Reformatting ACM. All changes are bit-exact in this CL.

TEST=VoE auto-test, audio_coding_module_test; 

only 15 ms of teststereo_out_1.pcm is not bit-exact with output file of the head revision
Review URL: https://webrtc-codereview.appspot.com/937035

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3287 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_coding/main/interface/audio_coding_module.h b/webrtc/modules/audio_coding/main/interface/audio_coding_module.h
index 2d38c3f..8679b36 100644
--- a/webrtc/modules/audio_coding/main/interface/audio_coding_module.h
+++ b/webrtc/modules/audio_coding/main/interface/audio_coding_module.h
@@ -11,18 +11,20 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_INTERFACE_AUDIO_CODING_MODULE_H
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_INTERFACE_AUDIO_CODING_MODULE_H
 
-#include "audio_coding_module_typedefs.h"
-#include "module.h"
-// TODO(turajs): If possible, forward declare and remove the following include.
-#include "module_common_types.h"
-
+#include "webrtc/common_types.h"
+#include "webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h"
+#include "webrtc/modules/interface/module.h"
+#include "webrtc/typedefs.h"
 
 namespace webrtc {
 
 // forward declarations
 struct CodecInst;
+struct WebRtcRTPHeader;
+class AudioFrame;
+class RTPFragmentationHeader;
 
-#define WEBRTC_10MS_PCM_AUDIO 960 // 16 bits super wideband 48 Khz
+#define WEBRTC_10MS_PCM_AUDIO 960 // 16 bits super wideband 48 kHz
 
 // Callback class used for sending data ready to be packetized
 class AudioPacketizationCallback {
@@ -30,8 +32,11 @@
   virtual ~AudioPacketizationCallback() {}
 
   virtual WebRtc_Word32 SendData(
-      FrameType frameType, WebRtc_UWord8 payloadType, WebRtc_UWord32 timeStamp,
-      const WebRtc_UWord8* payloadData, WebRtc_UWord16 payloadSize,
+      FrameType frame_type,
+      WebRtc_UWord8 payload_type,
+      WebRtc_UWord32 timestamp,
+      const WebRtc_UWord8* payload_data,
+      WebRtc_UWord16 payload_len_bytes,
       const RTPFragmentationHeader* fragmentation) = 0;
 };
 
@@ -40,7 +45,7 @@
  public:
   virtual ~AudioCodingFeedback() {}
 
-  virtual WebRtc_Word32 IncomingDtmf(const WebRtc_UWord8 digitDtmf,
+  virtual WebRtc_Word32 IncomingDtmf(const WebRtc_UWord8 digit_dtmf,
                                      const bool end) = 0;
 };
 
@@ -96,17 +101,17 @@
   // Get supported codec with list number.
   //
   // Input:
-  //   -listId             : list number.
+  //   -list_id             : list number.
   //
   // Output:
   //   -codec              : a structure where the parameters of the codec,
   //                         given by list number is written to.
   //
   // Return value:
-  //   -1 if the list number (listId) is invalid.
+  //   -1 if the list number (list_id) is invalid.
   //    0 if succeeded.
   //
-  static WebRtc_Word32 Codec(const WebRtc_UWord8 listId, CodecInst& codec);
+  static WebRtc_Word32 Codec(const WebRtc_UWord8 list_id, CodecInst& codec);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 Codec()
@@ -124,7 +129,7 @@
   //                         default parameters of the codec.
   //
   // Return value:
-  //   -1 if the list number (listId) is invalid.
+  //   -1 if no codec matches the given parameters.
   //    0 if succeeded.
   //
   static WebRtc_Word32 Codec(const char* payload_name, CodecInst& codec,
@@ -154,10 +159,10 @@
   // Checks the validity of the parameters of the given codec.
   //
   // Input:
-  //   -codec              : the structur which keeps the parameters of the
+  //   -codec              : the structure which keeps the parameters of the
   //                         codec.
   //
-  // Reurn value:
+  // Return value:
   //   true if the parameters are valid,
   //   false if any parameter is not valid.
   //
@@ -194,7 +199,7 @@
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 RegisterSendCodec()
-  // Registers a codec, specified by "sendCodec," as sending codec.
+  // Registers a codec, specified by |send_codec|, as sending codec.
   // This API can be called multiple of times to register Codec. The last codec
   // registered overwrites the previous ones.
   // The API can also be used to change payload type for CNG and RED, which are
@@ -211,7 +216,7 @@
   // secondary encoder will be unregistered.
   //
   // Input:
-  //   -sendCodec          : Parameters of the codec to be registered, c.f.
+  //   -send_codec         : Parameters of the codec to be registered, c.f.
   //                         common_types.h for the definition of
   //                         CodecInst.
   //
@@ -219,7 +224,7 @@
   //   -1 if failed to initialize,
   //    0 if succeeded.
   //
-  virtual WebRtc_Word32 RegisterSendCodec(const CodecInst& sendCodec) = 0;
+  virtual WebRtc_Word32 RegisterSendCodec(const CodecInst& send_codec) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // int RegisterSecondarySendCodec()
@@ -253,13 +258,13 @@
   // Get parameters for the codec currently registered as send codec.
   //
   // Output:
-  //   -currentSendCodec          : parameters of the send codec.
+  //   -current_send_codec          : parameters of the send codec.
   //
   // Return value:
   //   -1 if failed to get send codec,
   //    0 if succeeded.
   //
-  virtual WebRtc_Word32 SendCodec(CodecInst& currentSendCodec) const = 0;
+  virtual WebRtc_Word32 SendCodec(CodecInst& current_send_codec) const = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // int SecondarySendCodec()
@@ -336,7 +341,7 @@
   // current encoder ACM will resample the audio.
   //
   // Input:
-  //   -audioFrame         : the input audio frame, containing raw audio
+  //   -audio_frame        : the input audio frame, containing raw audio
   //                         sampling frequency etc.,
   //                         c.f. module_common_types.h for definition of
   //                         AudioFrame.
@@ -347,7 +352,7 @@
   //   < -1   to add the frame to the buffer n samples had to be
   //          overwritten, -n is the return value in this case.
   //
-  virtual WebRtc_Word32 Add10MsData(const AudioFrame& audioFrame) = 0;
+  virtual WebRtc_Word32 Add10MsData(const AudioFrame& audio_frame) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // (FEC) Forward Error Correction
@@ -368,14 +373,14 @@
   // This means that FEC is actually a RED scheme.
   //
   // Input:
-  //   -enableFEC          : if true FEC is enabled, otherwise FEC is
+  //   -enable_fec         : if true FEC is enabled, otherwise FEC is
   //                         disabled.
   //
   // Return value:
   //   -1 if failed to set FEC status,
   //    0 if succeeded.
   //
-  virtual WebRtc_Word32 SetFECStatus(const bool enableFEC) = 0;
+  virtual WebRtc_Word32 SetFECStatus(const bool enable_fec) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // bool FECStatus()
@@ -394,7 +399,7 @@
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 SetVAD()
   // If DTX is enabled & the codec does not have internal DTX/VAD
-  // WebRtc VAD will be automatically enabled and 'enableVAD' is ignored.
+  // WebRtc VAD will be automatically enabled and |enable_vad| is ignored.
   //
   // If DTX is disabled but VAD is enabled no DTX packets are send,
   // regardless of whether the codec has internal DTX/VAD or not. In this
@@ -403,11 +408,11 @@
   // NOTE! VAD/DTX is not supported when sending stereo.
   //
   // Inputs:
-  //   -enableDTX          : if true DTX is enabled,
+  //   -enable_dtx         : if true DTX is enabled,
   //                         otherwise DTX is disabled.
-  //   -enableVAD          : if true VAD is enabled,
+  //   -enable_vad         : if true VAD is enabled,
   //                         otherwise VAD is disabled.
-  //   -vadMode            : determines the aggressiveness of VAD. A more
+  //   -vad_mode           : determines the aggressiveness of VAD. A more
   //                         aggressive mode results in more frames labeled
   //                         as in-active, c.f. definition of
   //                         ACMVADMode in audio_coding_module_typedefs.h
@@ -417,27 +422,27 @@
   //   -1 if failed to set up VAD/DTX,
   //    0 if succeeded.
   //
-  virtual WebRtc_Word32 SetVAD(const bool enableDTX = true,
-                               const bool enableVAD = false,
-                               const ACMVADMode vadMode = VADNormal) = 0;
+  virtual WebRtc_Word32 SetVAD(const bool enable_dtx = true,
+                               const bool enable_vad = false,
+                               const ACMVADMode vad_mode = VADNormal) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 VAD()
   // Get VAD status.
   //
   // Outputs:
-  //   -dtxEnabled         : is set to true if DTX is enabled, otherwise
+  //   -dtx_enabled        : is set to true if DTX is enabled, otherwise
   //                         is set to false.
-  //   -vadEnabled         : is set to true if VAD is enabled, otherwise
+  //   -vad_enabled        : is set to true if VAD is enabled, otherwise
   //                         is set to false.
-  //   -vadMode            : is set to the current aggressiveness of VAD.
+  //   -vad_mode            : is set to the current aggressiveness of VAD.
   //
   // Return value:
   //   -1 if fails to retrieve the setting of DTX/VAD,
-  //    0 if succeeeded.
+  //    0 if succeeded.
   //
-  virtual WebRtc_Word32 VAD(bool& dtxEnabled, bool& vadEnabled,
-                            ACMVADMode& vadMode) const = 0;
+  virtual WebRtc_Word32 VAD(bool& dtx_enabled, bool& vad_enabled,
+                            ACMVADMode& vad_mode) const = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 ReplaceInternalDTXWithWebRtc()
@@ -445,7 +450,7 @@
   // supported for G729, where this call replaces AnnexB with WebRtc DTX.
   //
   // Input:
-  //   -useWebRtcDTX         : if false (default) the codec built-in DTX/VAD
+  //   -use_webrtc_dtx     : if false (default) the codec built-in DTX/VAD
   //                         scheme is used, otherwise the internal DTX is
   //                         replaced with WebRtc DTX/VAD.
   //
@@ -454,7 +459,7 @@
   //    0 if succeeded.
   //
   virtual WebRtc_Word32 ReplaceInternalDTXWithWebRtc(
-      const bool useWebRtcDTX = false) = 0;
+      const bool use_webrtc_dtx = false) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 IsInternalDTXReplacedWithWebRtc()
@@ -462,7 +467,7 @@
   // WebRtc DTX. This is only supported for G729.
   //
   // Output:
-  //   -usesWebRtcDTX        : is set to true if the codec internal DTX is
+  //   -uses_webrtc_dtx    : is set to true if the codec internal DTX is
   //                         replaced with WebRtc DTX/VAD, otherwise it is set
   //                         to false.
   //
@@ -471,7 +476,7 @@
   //    0 if succeeded.
   //
   virtual WebRtc_Word32 IsInternalDTXReplacedWithWebRtc(
-      bool& usesWebRtcDTX) = 0;
+      bool& uses_webrtc_dtx) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 RegisterVADCallback()
@@ -481,13 +486,13 @@
   // VAD is employed to identify a frame as active/inactive.
   //
   // Input:
-  //   -vadCallback        : pointer to a callback function.
+  //   -vad_callback        : pointer to a callback function.
   //
   // Return value:
   //   -1 if failed to register the callback function.
   //    0 if the callback function is registered successfully.
   //
-  virtual WebRtc_Word32 RegisterVADCallback(ACMVADCallback* vadCallback) = 0;
+  virtual WebRtc_Word32 RegisterVADCallback(ACMVADCallback* vad_callback) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   //   Receiver
@@ -544,7 +549,7 @@
   // codecs, CNG-NB, CNG-WB, CNG-SWB, AVT and RED.
   //
   // Input:
-  //   -receiveCodec       : parameters of the codec to be registered, c.f.
+  //   -receive_codec      : parameters of the codec to be registered, c.f.
   //                         common_types.h for the definition of
   //                         CodecInst.
   //
@@ -552,7 +557,8 @@
   //   -1 if failed to register the codec
   //    0 if the codec registered successfully.
   //
-  virtual WebRtc_Word32 RegisterReceiveCodec(const CodecInst& receiveCodec) = 0;
+  virtual WebRtc_Word32 RegisterReceiveCodec(
+      const CodecInst& receive_codec) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 UnregisterReceiveCodec()
@@ -560,22 +566,22 @@
   // from the list of possible receive codecs.
   //
   // Input:
-  //   -payloadType        : The number representing the payload type to
+  //   -payload_type        : The number representing the payload type to
   //                         unregister.
   //
   // Output:
-  //   -1 if the unregistration fails.
+  //   -1 if fails to unregister.
   //    0 if the given codec is successfully unregistered.
   //
   virtual WebRtc_Word32 UnregisterReceiveCodec(
-      const WebRtc_Word16 receiveCodec) = 0;
+      const WebRtc_Word16 payload_type) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 ReceiveCodec()
   // Get the codec associated with last received payload.
   //
   // Output:
-  //   -currRcvCodec       : parameters of the codec associated with the last
+  //   -curr_receive_codec : parameters of the codec associated with the last
   //                         received payload, c.f. common_types.h for
   //                         the definition of CodecInst.
   //
@@ -583,25 +589,25 @@
   //   -1 if failed to retrieve the codec,
   //    0 if the codec is successfully retrieved.
   //
-  virtual WebRtc_Word32 ReceiveCodec(CodecInst& currRcvCodec) const = 0;
+  virtual WebRtc_Word32 ReceiveCodec(CodecInst& curr_receive_codec) const = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 IncomingPacket()
   // Call this function to insert a parsed RTP packet into ACM.
   //
   // Inputs:
-  //   -incomingPayload    : received payload.
-  //   -payloadLengthByte  : the length of payload in bytes.
-  //   -rtpInfo            : the relevant information retrieved from RTP
+  //   -incoming_payload   : received payload.
+  //   -payload_len_bytes  : the length of payload in bytes.
+  //   -rtp_info           : the relevant information retrieved from RTP
   //                         header.
   //
   // Return value:
   //   -1 if failed to push in the payload
   //    0 if payload is successfully pushed in.
   //
-  virtual WebRtc_Word32 IncomingPacket(const WebRtc_UWord8* incomingPayload,
-                                       const WebRtc_Word32 payloadLengthByte,
-                                       const WebRtcRTPHeader& rtpInfo) = 0;
+  virtual WebRtc_Word32 IncomingPacket(const WebRtc_UWord8* incoming_payload,
+                                       const WebRtc_Word32 payload_len_bytes,
+                                       const WebRtcRTPHeader& rtp_info) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 IncomingPayload()
@@ -610,9 +616,9 @@
   // pre-encoded files are pushed in ACM
   //
   // Inputs:
-  //   -incomingPayload    : received payload.
-  //   -payloadLenghtByte  : the length, in bytes, of the received payload.
-  //   -payloadType        : the payload-type. This specifies which codec has
+  //   -incoming_payload   : received payload.
+  //   -payload_len_byte   : the length, in bytes, of the received payload.
+  //   -payload_type       : the payload-type. This specifies which codec has
   //                         to be used to decode the payload.
   //   -timestamp          : send timestamp of the payload. ACM starts with
   //                         a random value and increment it by the
@@ -627,9 +633,9 @@
   //   -1 if failed to push in the payload
   //    0 if payload is successfully pushed in.
   //
-  virtual WebRtc_Word32 IncomingPayload(const WebRtc_UWord8* incomingPayload,
-                                        const WebRtc_Word32 payloadLengthByte,
-                                        const WebRtc_UWord8 payloadType,
+  virtual WebRtc_Word32 IncomingPayload(const WebRtc_UWord8* incoming_payload,
+                                        const WebRtc_Word32 payload_len_byte,
+                                        const WebRtc_UWord8 payload_type,
                                         const WebRtc_UWord32 timestamp = 0) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
@@ -637,22 +643,22 @@
   // Set Minimum playout delay, used for lip-sync.
   //
   // Input:
-  //   -timeMs             : minimum delay in milliseconds.
+  //   -time_ms            : minimum delay in milliseconds.
   //
   // Return value:
   //   -1 if failed to set the delay,
   //    0 if the minimum delay is set.
   //
-  virtual WebRtc_Word32 SetMinimumPlayoutDelay(const WebRtc_Word32 timeMs) = 0;
+  virtual WebRtc_Word32 SetMinimumPlayoutDelay(const WebRtc_Word32 time_ms) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 RegisterIncomingMessagesCallback()
   // Used by the module to deliver messages to the codec module/application
-  // when a Dtmf tone is detected, as well as when it stopped.
+  // when a DTMF tone is detected, as well as when it stopped.
   //
   // Inputs:
-  //   -inMsgCallback      : pointer to callback function which will be called
-  //                         if Dtmf is detected.
+  //   -in_message_callback: pointer to callback function which will be called
+  //                         if DTMF is detected.
   //   -cpt                : enables CPT (Call Progress Tone) detection for the
   //                         specified country. c.f. definition of ACMCountries
   //                         in audio_coding_module_typedefs.h for valid
@@ -665,20 +671,20 @@
   //
   virtual WebRtc_Word32
       RegisterIncomingMessagesCallback(
-          AudioCodingFeedback* inMsgCallback,
+          AudioCodingFeedback* in_message_callback,
           const ACMCountries cpt = ACMDisableCountryDetection) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 SetDtmfPlayoutStatus()
-  // Configure Dtmf playout, i.e. whether out-of-band
-  // Dtmf tones are played or not.
+  // Configure DTMF playout, i.e. whether out-of-band
+  // DTMF tones are played or not.
   //
   // Input:
-  //   -enable             : if true to enable playout out-of-band Dtmf tones,
+  //   -enable             : if true to enable playout out-of-band DTMF tones,
   //                         false to disable.
   //
   // Return value:
-  //   -1 if the method fails, e.g. Dtmf playout is not supported.
+  //   -1 if the method fails, e.g. DTMF playout is not supported.
   //    0 if the status is set successfully.
   //
   virtual WebRtc_Word32 SetDtmfPlayoutStatus(const bool enable) = 0;
@@ -696,7 +702,7 @@
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 SetBackgroundNoiseMode()
   // Sets the mode of the background noise playout in an event of long
-  // packetloss burst. For the valid modes see the declaration of
+  // packet loss burst. For the valid modes see the declaration of
   // ACMBackgroundNoiseMode in audio_coding_module_typedefs.h.
   //
   // Input:
@@ -712,7 +718,7 @@
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 BackgroundNoiseMode()
   // Call this method to get the mode of the background noise playout.
-  // Playout of background noise is a result of a long packetloss burst.
+  // Playout of background noise is a result of a long packet loss burst.
   // See ACMBackgroundNoiseMode in audio_coding_module_typedefs.h for
   // possible modes.
   //
@@ -746,7 +752,7 @@
   // Get the estimate of the Bandwidth, in bits/second, based on the incoming
   // stream. This API is useful in one-way communication scenarios, where
   // the bandwidth information is sent in an out-of-band fashion.
-  // Currently only supported if iSAC is registered as a reciever.
+  // Currently only supported if iSAC is registered as a receiver.
   //
   // Return value:
   //   >0 bandwidth in bits/second.
@@ -762,7 +768,7 @@
   // delay. In FAX mode, NetEQ is optimized to have few delay changes as
   // possible and maintain a constant delay, perhaps large relative to voice
   // mode, to avoid PLC. In streaming mode, we tolerate a little more delay
-  // to acheive better jitter robustness.
+  // to achieve better jitter robustness.
   //
   // Input:
   //   -mode               : playout mode. Possible inputs are:
@@ -786,7 +792,7 @@
   //   fax:         a mode that is optimized for receiving FAX signals.
   //                In this mode NetEq tries to maintain a constant high
   //                delay to avoid PLC if possible.
-  //   streaming:   a mode that is suitable for streaminq. In this mode we
+  //   streaming:   a mode that is suitable for streaming. In this mode we
   //                accept longer delay to improve jitter robustness.
   //
   virtual AudioPlayoutMode PlayoutMode() const = 0;
@@ -797,12 +803,12 @@
   // frequency. ACM will perform a resampling if required.
   //
   // Input:
-  //   -desiredFreqHz      : the desired sampling frequency, in Hertz, of the
+  //   -desired_freq_hz    : the desired sampling frequency, in Hertz, of the
   //                         output audio. If set to -1, the function returns the
   //                         audio at the current sampling frequency.
   //
   // Output:
-  //   -audioFrame         : output audio frame which contains raw audio data
+  //   -audio_frame        : output audio frame which contains raw audio data
   //                         and other relevant parameters, c.f.
   //                         module_common_types.h for the definition of
   //                         AudioFrame.
@@ -812,8 +818,8 @@
   //    0 if the function succeeds.
   //
   virtual WebRtc_Word32
-      PlayoutData10Ms(const WebRtc_Word32 desiredFreqHz,
-                      AudioFrame &audioFrame) = 0;
+      PlayoutData10Ms(const WebRtc_Word32 desired_freq_hz,
+                      AudioFrame &audio_frame) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   //   (CNG) Comfort Noise Generation
@@ -855,43 +861,43 @@
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 SetISACMaxRate()
   // Set the maximum instantaneous rate of iSAC. For a payload of B bits
-  // with a frame-size of T sec the instantaneous rate is B/T bist per
-  // second. Therefore, (B/T < maxRateBitPerSec) and
-  // (B < maxPayloadLenBytes * 8) are always satisfied for iSAC payloads,
+  // with a frame-size of T sec the instantaneous rate is B/T bits per
+  // second. Therefore, (B/T < |max_rate_bps|) and
+  // (B < |max_payload_len_bytes| * 8) are always satisfied for iSAC payloads,
   // c.f SetISACMaxPayloadSize().
   //
   // Input:
-  //   -maxRateBitPerSec   : maximum instantaneous bit-rate given in bits/sec.
+  //   -max_rate_bps       : maximum instantaneous bit-rate given in bits/sec.
   //
   // Return value:
   //   -1 if failed to set the maximum rate.
   //    0 if the maximum rate is set successfully.
   //
   virtual WebRtc_Word32 SetISACMaxRate(
-      const WebRtc_UWord32 maxRateBitPerSec) = 0;
+      const WebRtc_UWord32 max_rate_bps) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 SetISACMaxPayloadSize()
   // Set the maximum payload size of iSAC packets. No iSAC payload,
   // regardless of its frame-size, may exceed the given limit. For
-  // an iSAC payload of size B bits and frame-size T sec we have;
-  // (B < maxPayloadLenBytes * 8) and (B/T < maxRateBitPerSec), c.f.
+  // an iSAC payload of size B bits and frame-size T seconds we have;
+  // (B < |max_payload_len_bytes| * 8) and (B/T < |max_rate_bps|), c.f.
   // SetISACMaxRate().
   //
   // Input:
-  //   -maxPayloadLenBytes : maximum payload size in bytes.
+  //   -max_payload_len_bytes : maximum payload size in bytes.
   //
   // Return value:
-  //   -1 if failed to set the maximm  payload-size.
-  //    0 if the given linit is seet successfully.
+  //   -1 if failed to set the maximum  payload-size.
+  //    0 if the given length is set successfully.
   //
   virtual WebRtc_Word32 SetISACMaxPayloadSize(
-      const WebRtc_UWord16 maxPayloadLenBytes) = 0;
+      const WebRtc_UWord16 max_payload_len_bytes) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 ConfigISACBandwidthEstimator()
   // Call this function to configure the bandwidth estimator of ISAC.
-  // During the adaptation of bit-rate, iSAC atomatically adjusts the
+  // During the adaptation of bit-rate, iSAC automatically adjusts the
   // frame-size (either 30 or 60 ms) to save on RTP header. The initial
   // frame-size can be specified by the first argument. The configuration also
   // regards the initial estimate of bandwidths. The estimator starts from
@@ -900,22 +906,22 @@
   // adaptation of frame-size. This is specified by the last parameter.
   //
   // Input:
-  //   -initFrameSizeMsec  : initial frame-size in milisecods. For iSAC-wb
+  //   -init_frame_size_ms : initial frame-size in milliseconds. For iSAC-wb
   //                         30 ms and 60 ms (default) are acceptable values,
   //                         and for iSAC-swb 30 ms is the only acceptable
-  //                         value. Zero indiates default value.
-  //   -initRateBitPerSec  : initial estimate of the bandwidth. Values
+  //                         value. Zero indicates default value.
+  //   -init_rate_bps      : initial estimate of the bandwidth. Values
   //                         between 10000 and 58000 are acceptable.
-  //   -enforceFrameSize   : if true, the frame-size will not be adapted.
+  //   -enforce_srame_size : if true, the frame-size will not be adapted.
   //
   // Return value:
   //   -1 if failed to configure the bandwidth estimator,
   //    0 if the configuration was successfully applied.
   //
   virtual WebRtc_Word32 ConfigISACBandwidthEstimator(
-      const WebRtc_UWord8 initFrameSizeMsec,
-      const WebRtc_UWord16 initRateBitPerSec,
-      const bool enforceFrameSize = false) = 0;
+      const WebRtc_UWord8 init_frame_size_ms,
+      const WebRtc_UWord16 init_rate_bps,
+      const bool enforce_frame_size = false) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   //   statistics
@@ -926,14 +932,14 @@
   // Get network statistics.
   //
   // Input:
-  //   -networkStatistics  : a structure that contains network statistics.
+  //   -network_statistics : a structure that contains network statistics.
   //
   // Return value:
   //   -1 if failed to set the network statistics,
   //    0 if statistics are set successfully.
   //
   virtual WebRtc_Word32 NetworkStatistics(
-      ACMNetworkStatistics& networkStatistics) const = 0;
+      ACMNetworkStatistics& network_statistics) const = 0;
 };
 
 }  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h b/webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h
index 1cb28f6..cc89151 100644
--- a/webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h
+++ b/webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_INTERFACE_AUDIO_CODING_MODULE_TYPEDEFS_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_INTERFACE_AUDIO_CODING_MODULE_TYPEDEFS_H_
 
-#include "typedefs.h"
+#include "webrtc/typedefs.h"
 
 namespace webrtc {
 
diff --git a/webrtc/modules/audio_coding/main/source/acm_amr.cc b/webrtc/modules/audio_coding/main/source/acm_amr.cc
index 067e7f0..249fe7b 100644
--- a/webrtc/modules/audio_coding/main/source/acm_amr.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_amr.cc
@@ -8,14 +8,15 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_amr.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "audio_coding_module_typedefs.h"
-#include "rw_lock_wrapper.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_amr.h"
+
+#include "webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/rw_lock_wrapper.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 #ifdef WEBRTC_CODEC_AMR
 // NOTE! GSM AMR is not included in the open-source package. The following
@@ -25,23 +26,23 @@
 //
 // The API in the header file should match the one below.
 //
-// int16_t WebRtcAmr_CreateEnc(AMR_encinst_t_** encInst);
-// int16_t WebRtcAmr_CreateDec(AMR_decinst_t_** decInst);
-// int16_t WebRtcAmr_FreeEnc(AMR_encinst_t_* encInst);
-// int16_t WebRtcAmr_FreeDec(AMR_decinst_t_* decInst);
-// int16_t WebRtcAmr_Encode(AMR_encinst_t_* encInst,
+// int16_t WebRtcAmr_CreateEnc(AMR_encinst_t_** enc_inst);
+// int16_t WebRtcAmr_CreateDec(AMR_decinst_t_** dec_inst);
+// int16_t WebRtcAmr_FreeEnc(AMR_encinst_t_* enc_inst);
+// int16_t WebRtcAmr_FreeDec(AMR_decinst_t_* dec_inst);
+// int16_t WebRtcAmr_Encode(AMR_encinst_t_* enc_inst,
 //                          int16_t* input,
 //                          int16_t len,
 //                          int16_t*output,
 //                          int16_t mode);
-//  int16_t WebRtcAmr_EncoderInit(AMR_encinst_t_* encInst,
-//                               int16_t dtxMode);
-// int16_t WebRtcAmr_EncodeBitmode(AMR_encinst_t_* encInst,
+//  int16_t WebRtcAmr_EncoderInit(AMR_encinst_t_* enc_inst,
+//                               int16_t dtx_mode);
+// int16_t WebRtcAmr_EncodeBitmode(AMR_encinst_t_* enc_inst,
 //                                 int format);
-// int16_t WebRtcAmr_Decode(AMR_decinst_t_* decInst);
-// int16_t WebRtcAmr_DecodePlc(AMR_decinst_t_* decInst);
-// int16_t WebRtcAmr_DecoderInit(AMR_decinst_t_* decInst);
-// int16_t WebRtcAmr_DecodeBitmode(AMR_decinst_t_* decInst,
+// int16_t WebRtcAmr_Decode(AMR_decinst_t_* dec_inst);
+// int16_t WebRtcAmr_DecodePlc(AMR_decinst_t_* dec_inst);
+// int16_t WebRtcAmr_DecoderInit(AMR_decinst_t_* dec_inst);
+// int16_t WebRtcAmr_DecodeBitmode(AMR_decinst_t_* dec_inst,
 //                                 int format);
 #include "amr_interface.h"
 #endif
@@ -49,13 +50,13 @@
 namespace webrtc {
 
 #ifndef WEBRTC_CODEC_AMR
-ACMAMR::ACMAMR(WebRtc_Word16 /* codecID */)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL),
-      _encodingMode(-1),  // Invalid value.
-      _encodingRate(0),  // Invalid value.
-      _encoderPackingFormat(AMRBandwidthEfficient),
-      _decoderPackingFormat(AMRBandwidthEfficient) {
+ACMAMR::ACMAMR(WebRtc_Word16 /* codec_id */)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL),
+      encoding_mode_(-1),  // Invalid value.
+      encoding_rate_(0),  // Invalid value.
+      encoder_packing_format_(AMRBandwidthEfficient),
+      decoder_packing_format_(AMRBandwidthEfficient) {
   return;
 }
 
@@ -63,16 +64,16 @@
   return;
 }
 
-WebRtc_Word16 ACMAMR::InternalEncode(WebRtc_UWord8* /* bitStream */,
-                                     WebRtc_Word16* /* bitStreamLenByte */) {
+WebRtc_Word16 ACMAMR::InternalEncode(WebRtc_UWord8* /* bitstream */,
+                                     WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
-WebRtc_Word16 ACMAMR::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                 WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMAMR::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                 WebRtc_Word16 /* bitstream_len_byte */,
                                  WebRtc_Word16* /* audio */,
-                                 WebRtc_Word16* /* audioSamples */,
-                                 WebRtc_Word8* /* speechType */) {
+                                 WebRtc_Word16* /* audio_samples */,
+                                 WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
@@ -85,17 +86,17 @@
 }
 
 WebRtc_Word16 ACMAMR::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMAMR::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-WebRtc_Word32 ACMAMR::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef */,
-                               const CodecInst& /* codecInst */) {
+WebRtc_Word32 ACMAMR::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def */,
+                               const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -123,12 +124,12 @@
   return -1;
 }
 
-void ACMAMR::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMAMR::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
 WebRtc_Word16 ACMAMR::SetAMREncoderPackingFormat(
-    ACMAMRPackingFormat /* packingFormat */) {
+    ACMAMRPackingFormat /* packing_format */) {
   return -1;
 }
 
@@ -137,7 +138,7 @@
 }
 
 WebRtc_Word16 ACMAMR::SetAMRDecoderPackingFormat(
-    ACMAMRPackingFormat /* packingFormat */) {
+    ACMAMRPackingFormat /* packing_format */) {
   return -1;
 }
 
@@ -156,78 +157,78 @@
 #define WEBRTC_AMR_MR102  6
 #define WEBRTC_AMR_MR122  7
 
-ACMAMR::ACMAMR(WebRtc_Word16 codecID)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL),
-      _encodingMode(-1), // invalid value
-      _encodingRate(0) { // invalid value
-  _codecID = codecID;
-  _hasInternalDTX = true;
-  _encoderPackingFormat = AMRBandwidthEfficient;
-  _decoderPackingFormat = AMRBandwidthEfficient;
+ACMAMR::ACMAMR(WebRtc_Word16 codec_id)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL),
+      encoding_mode_(-1),  // invalid value
+      encoding_rate_(0) {  // invalid value
+  codec_id_ = codec_id;
+  has_internal_dtx_ = true;
+  encoder_packing_format_ = AMRBandwidthEfficient;
+  decoder_packing_format_ = AMRBandwidthEfficient;
   return;
 }
 
 ACMAMR::~ACMAMR() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcAmr_FreeEnc(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcAmr_FreeEnc(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
-  if (_decoderInstPtr != NULL) {
-    WebRtcAmr_FreeDec(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcAmr_FreeDec(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
   return;
 }
 
-WebRtc_Word16 ACMAMR::InternalEncode(WebRtc_UWord8* bitStream,
-                                     WebRtc_Word16* bitStreamLenByte) {
-  WebRtc_Word16 vadDecision = 1;
+WebRtc_Word16 ACMAMR::InternalEncode(WebRtc_UWord8* bitstream,
+                                     WebRtc_Word16* bitstream_len_byte) {
+  WebRtc_Word16 vad_decision = 1;
   // sanity check, if the rate is set correctly. we might skip this
   // sanity check. if rate is not set correctly, initialization flag
   // should be false and should not be here.
-  if ((_encodingMode < WEBRTC_AMR_MR475) ||
-      (_encodingMode > WEBRTC_AMR_MR122)) {
-    *bitStreamLenByte = 0;
+  if ((encoding_mode_ < WEBRTC_AMR_MR475) ||
+      (encoding_mode_ > WEBRTC_AMR_MR122)) {
+    *bitstream_len_byte = 0;
     return -1;
   }
-  *bitStreamLenByte = WebRtcAmr_Encode(_encoderInstPtr,
-                                       &_inAudio[_inAudioIxRead],
-                                       _frameLenSmpl,
-                                       (WebRtc_Word16*) bitStream,
-                                       _encodingMode);
+  *bitstream_len_byte = WebRtcAmr_Encode(encoder_inst_ptr_,
+                                         &in_audio_[in_audio_ix_read_],
+                                         frame_len_smpl_,
+                                         (WebRtc_Word16*)bitstream,
+                                         encoding_mode_);
 
   // Update VAD, if internal DTX is used
-  if (_hasInternalDTX && _dtxEnabled) {
-    if (*bitStreamLenByte <= (7 * _frameLenSmpl / 160)) {
-      vadDecision = 0;
+  if (has_internal_dtx_ && dtx_enabled_) {
+    if (*bitstream_len_byte <= (7 * frame_len_smpl_ / 160)) {
+      vad_decision = 0;
     }
     for (WebRtc_Word16 n = 0; n < MAX_FRAME_SIZE_10MSEC; n++) {
-      _vadLabel[n] = vadDecision;
+      vad_label_[n] = vad_decision;
     }
   }
   // increment the read index
-  _inAudioIxRead += _frameLenSmpl;
-  return *bitStreamLenByte;
+  in_audio_ix_read_ += frame_len_smpl_;
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMAMR::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                 WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMAMR::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                 WebRtc_Word16 /* bitstream_len_byte */,
                                  WebRtc_Word16* /* audio */,
-                                 WebRtc_Word16* /* audioSamples */,
-                                 WebRtc_Word8* /* speechType */) {
+                                 WebRtc_Word16* /* audio_samples */,
+                                 WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
 WebRtc_Word16 ACMAMR::EnableDTX() {
-  if (_dtxEnabled) {
+  if (dtx_enabled_) {
     return 0;
-  } else if (_encoderExist) { // check if encoder exist
+  } else if (encoder_exist_) {  // check if encoder exist
     // enable DTX
-    if (WebRtcAmr_EncoderInit(_encoderInstPtr, 1) < 0) {
+    if (WebRtcAmr_EncoderInit(encoder_inst_ptr_, 1) < 0) {
       return -1;
     }
-    _dtxEnabled = true;
+    dtx_enabled_ = true;
     return 0;
   } else {
     return -1;
@@ -235,14 +236,14 @@
 }
 
 WebRtc_Word16 ACMAMR::DisableDTX() {
-  if (!_dtxEnabled) {
+  if (!dtx_enabled_) {
     return 0;
-  } else if (_encoderExist) { // check if encoder exist
+  } else if (encoder_exist_) {  // check if encoder exist
     // disable DTX
-    if (WebRtcAmr_EncoderInit(_encoderInstPtr, 0) < 0) {
+    if (WebRtcAmr_EncoderInit(encoder_inst_ptr_, 0) < 0) {
       return -1;
     }
-    _dtxEnabled = false;
+    dtx_enabled_ = false;
     return 0;
   } else {
     // encoder doesn't exists, therefore disabling is harmless
@@ -250,26 +251,26 @@
   }
 }
 
-WebRtc_Word16 ACMAMR::InternalInitEncoder(WebRtcACMCodecParams* codecParams) {
-  WebRtc_Word16 status = SetBitRateSafe((codecParams->codecInstant).rate);
+WebRtc_Word16 ACMAMR::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
+  WebRtc_Word16 status = SetBitRateSafe((codec_params->codec_inst).rate);
   status += (WebRtcAmr_EncoderInit(
-      _encoderInstPtr, ((codecParams->enableDTX) ? 1 : 0)) < 0) ? -1 : 0;
+      encoder_inst_ptr_, ((codec_params->enable_dtx) ? 1 : 0)) < 0) ? -1 : 0;
   status += (WebRtcAmr_EncodeBitmode(
-      _encoderInstPtr, _encoderPackingFormat) < 0) ? -1 : 0;
+      encoder_inst_ptr_, encoder_packing_format_) < 0) ? -1 : 0;
   return (status < 0) ? -1 : 0;
 }
 
 WebRtc_Word16 ACMAMR::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   WebRtc_Word16 status =
-      ((WebRtcAmr_DecoderInit(_decoderInstPtr) < 0) ? -1 : 0);
-  status += WebRtcAmr_DecodeBitmode(_decoderInstPtr, _decoderPackingFormat);
+      ((WebRtcAmr_DecoderInit(decoder_inst_ptr_) < 0) ? -1 : 0);
+  status += WebRtcAmr_DecodeBitmode(decoder_inst_ptr_, decoder_packing_format_);
   return (status < 0) ? -1 : 0;
 }
 
-WebRtc_Word32 ACMAMR::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                               const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
+WebRtc_Word32 ACMAMR::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                               const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
     // Todo:
     // log error
     return -1;
@@ -278,9 +279,9 @@
   // "SET_CODEC_PAR" & "SET_AMR_FUNCTION."
   // Then call NetEQ to add the codec to it's
   // database.
-  SET_CODEC_PAR((codecDef), kDecoderAMR, codecInst.pltype, _decoderInstPtr,
+  SET_CODEC_PAR((codec_def), kDecoderAMR, codec_inst.pltype, decoder_inst_ptr_,
                 8000);
-  SET_AMR_FUNCTIONS((codecDef));
+  SET_AMR_FUNCTIONS((codec_def));
   return 0;
 }
 
@@ -289,75 +290,75 @@
 }
 
 WebRtc_Word16 ACMAMR::InternalCreateEncoder() {
-  return WebRtcAmr_CreateEnc(&_encoderInstPtr);
+  return WebRtcAmr_CreateEnc(&encoder_inst_ptr_);
 }
 
 void ACMAMR::DestructEncoderSafe() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcAmr_FreeEnc(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcAmr_FreeEnc(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
   // there is no encoder set the following
-  _encoderExist = false;
-  _encoderInitialized = false;
-  _encodingMode = -1; // invalid value
-  _encodingRate = 0; // invalid value
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
+  encoding_mode_ = -1;  // invalid value
+  encoding_rate_ = 0;  // invalid value
 }
 
 WebRtc_Word16 ACMAMR::InternalCreateDecoder() {
-  return WebRtcAmr_CreateDec(&_decoderInstPtr);
+  return WebRtcAmr_CreateDec(&decoder_inst_ptr_);
 }
 
 void ACMAMR::DestructDecoderSafe() {
-  if (_decoderInstPtr != NULL) {
-    WebRtcAmr_FreeDec(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcAmr_FreeDec(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
   // there is no encoder instance set the followings
-  _decoderExist = false;
-  _decoderInitialized = false;
+  decoder_exist_ = false;
+  decoder_initialized_ = false;
 }
 
 WebRtc_Word16 ACMAMR::SetBitRateSafe(const WebRtc_Word32 rate) {
   switch (rate) {
     case 4750: {
-      _encodingMode = WEBRTC_AMR_MR475;
-      _encodingRate = 4750;
+      encoding_mode_ = WEBRTC_AMR_MR475;
+      encoding_rate_ = 4750;
       break;
     }
     case 5150: {
-      _encodingMode = WEBRTC_AMR_MR515;
-      _encodingRate = 5150;
+      encoding_mode_ = WEBRTC_AMR_MR515;
+      encoding_rate_ = 5150;
       break;
     }
     case 5900: {
-      _encodingMode = WEBRTC_AMR_MR59;
-      _encodingRate = 5900;
+      encoding_mode_ = WEBRTC_AMR_MR59;
+      encoding_rate_ = 5900;
       break;
     }
     case 6700: {
-      _encodingMode = WEBRTC_AMR_MR67;
-      _encodingRate = 6700;
+      encoding_mode_ = WEBRTC_AMR_MR67;
+      encoding_rate_ = 6700;
       break;
     }
     case 7400: {
-      _encodingMode = WEBRTC_AMR_MR74;
-      _encodingRate = 7400;
+      encoding_mode_ = WEBRTC_AMR_MR74;
+      encoding_rate_ = 7400;
       break;
     }
     case 7950: {
-      _encodingMode = WEBRTC_AMR_MR795;
-      _encodingRate = 7950;
+      encoding_mode_ = WEBRTC_AMR_MR795;
+      encoding_rate_ = 7950;
       break;
     }
     case 10200: {
-      _encodingMode = WEBRTC_AMR_MR102;
-      _encodingRate = 10200;
+      encoding_mode_ = WEBRTC_AMR_MR102;
+      encoding_rate_ = 10200;
       break;
     }
     case 12200: {
-      _encodingMode = WEBRTC_AMR_MR122;
-      _encodingRate = 12200;
+      encoding_mode_ = WEBRTC_AMR_MR122;
+      encoding_rate_ = 12200;
       break;
     }
     default: {
@@ -367,58 +368,57 @@
   return 0;
 }
 
-void ACMAMR::InternalDestructEncoderInst(void* ptrInst) {
-  // Free the memory where ptrInst is pointing to
-  if (ptrInst != NULL) {
-    WebRtcAmr_FreeEnc(reinterpret_cast<AMR_encinst_t_*>(ptrInst));
+void ACMAMR::InternalDestructEncoderInst(void* ptr_inst) {
+  // Free the memory where ptr_inst is pointing to
+  if (ptr_inst != NULL) {
+    WebRtcAmr_FreeEnc(reinterpret_cast<AMR_encinst_t_*>(ptr_inst));
   }
   return;
 }
 
 WebRtc_Word16 ACMAMR::SetAMREncoderPackingFormat(
-    ACMAMRPackingFormat packingFormat) {
-  if ((packingFormat != AMRBandwidthEfficient) &&
-      (packingFormat != AMROctetAlligned) &&
-      (packingFormat != AMRFileStorage)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    ACMAMRPackingFormat packing_format) {
+  if ((packing_format != AMRBandwidthEfficient) &&
+      (packing_format != AMROctetAlligned) &&
+      (packing_format != AMRFileStorage)) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Invalid AMR Encoder packing-format.");
     return -1;
   } else {
-    if (WebRtcAmr_EncodeBitmode(_encoderInstPtr, packingFormat) < 0) {
+    if (WebRtcAmr_EncodeBitmode(encoder_inst_ptr_, packing_format) < 0) {
       return -1;
     } else {
-      _encoderPackingFormat = packingFormat;
+      encoder_packing_format_ = packing_format;
       return 0;
     }
   }
 }
 
 ACMAMRPackingFormat ACMAMR::AMREncoderPackingFormat() const {
-  return _encoderPackingFormat;
+  return encoder_packing_format_;
 }
 
 WebRtc_Word16 ACMAMR::SetAMRDecoderPackingFormat(
-    ACMAMRPackingFormat packingFormat) {
-  if ((packingFormat != AMRBandwidthEfficient) &&
-      (packingFormat != AMROctetAlligned) &&
-      (packingFormat != AMRFileStorage)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    ACMAMRPackingFormat packing_format) {
+  if ((packing_format != AMRBandwidthEfficient) &&
+      (packing_format != AMROctetAlligned) &&
+      (packing_format != AMRFileStorage)) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Invalid AMR decoder packing-format.");
     return -1;
   } else {
-    if (WebRtcAmr_DecodeBitmode(_decoderInstPtr, packingFormat) < 0) {
+    if (WebRtcAmr_DecodeBitmode(decoder_inst_ptr_, packing_format) < 0) {
       return -1;
     } else {
-      _decoderPackingFormat = packingFormat;
+      decoder_packing_format_ = packing_format;
       return 0;
     }
   }
 }
 
 ACMAMRPackingFormat ACMAMR::AMRDecoderPackingFormat() const {
-  return _decoderPackingFormat;
+  return decoder_packing_format_;
 }
 
 #endif
-
 }
diff --git a/webrtc/modules/audio_coding/main/source/acm_amr.h b/webrtc/modules/audio_coding/main/source/acm_amr.h
index d3c175c..ebff0bb 100644
--- a/webrtc/modules/audio_coding/main/source/acm_amr.h
+++ b/webrtc/modules/audio_coding/main/source/acm_amr.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_AMR_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_AMR_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 // forward declaration
 struct AMR_encinst_t_;
@@ -23,36 +23,37 @@
 
 class ACMAMR: public ACMGenericCodec {
  public:
-  ACMAMR(WebRtc_Word16 codecID);
+  explicit ACMAMR(WebRtc_Word16 codec_id);
   ~ACMAMR();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
   WebRtc_Word16 SetAMREncoderPackingFormat(
-      const ACMAMRPackingFormat packingFormat);
+      const ACMAMRPackingFormat packing_format);
 
   ACMAMRPackingFormat AMREncoderPackingFormat() const;
 
   WebRtc_Word16 SetAMRDecoderPackingFormat(
-      const ACMAMRPackingFormat packingFormat);
+      const ACMAMRPackingFormat packing_format);
 
   ACMAMRPackingFormat AMRDecoderPackingFormat() const;
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
-                           WebRtc_Word16* audio, WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
+                           WebRtc_Word16* audio, WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -62,7 +63,7 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   WebRtc_Word16 SetBitRateSafe(const WebRtc_Word32 rate);
 
@@ -70,14 +71,14 @@
 
   WebRtc_Word16 DisableDTX();
 
-  AMR_encinst_t_* _encoderInstPtr;
-  AMR_decinst_t_* _decoderInstPtr;
-  WebRtc_Word16 _encodingMode;
-  WebRtc_Word16 _encodingRate;
-  ACMAMRPackingFormat _encoderPackingFormat;
-  ACMAMRPackingFormat _decoderPackingFormat;
+  AMR_encinst_t_* encoder_inst_ptr_;
+  AMR_decinst_t_* decoder_inst_ptr_;
+  WebRtc_Word16 encoding_mode_;
+  WebRtc_Word16 encoding_rate_;
+  ACMAMRPackingFormat encoder_packing_format_;
+  ACMAMRPackingFormat decoder_packing_format_;
 };
 
-} // namespace webrtc
+}  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_AMR_H_
diff --git a/webrtc/modules/audio_coding/main/source/acm_amrwb.cc b/webrtc/modules/audio_coding/main/source/acm_amrwb.cc
index 4187a1f..caa9494 100644
--- a/webrtc/modules/audio_coding/main/source/acm_amrwb.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_amrwb.cc
@@ -8,14 +8,15 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_amrwb.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "audio_coding_module_typedefs.h"
-#include "rw_lock_wrapper.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_amrwb.h"
+
+#include "webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/rw_lock_wrapper.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 #ifdef WEBRTC_CODEC_AMRWB
 // NOTE! GSM AMR-wb is not included in the open-source package. The
@@ -25,20 +26,20 @@
 //
 // The API in the header file should match the one below.
 //
-// int16_t WebRtcAmrWb_CreateEnc(AMRWB_encinst_t_** encInst);
-// int16_t WebRtcAmrWb_CreateDec(AMRWB_decinst_t_** decInst);
-// int16_t WebRtcAmrWb_FreeEnc(AMRWB_encinst_t_* encInst);
-// int16_t WebRtcAmrWb_FreeDec(AMRWB_decinst_t_* decInst);
-// int16_t WebRtcAmrWb_Encode(AMRWB_encinst_t_* encInst, int16_t* input,
+// int16_t WebRtcAmrWb_CreateEnc(AMRWB_encinst_t_** enc_inst);
+// int16_t WebRtcAmrWb_CreateDec(AMRWB_decinst_t_** dec_inst);
+// int16_t WebRtcAmrWb_FreeEnc(AMRWB_encinst_t_* enc_inst);
+// int16_t WebRtcAmrWb_FreeDec(AMRWB_decinst_t_* dec_inst);
+// int16_t WebRtcAmrWb_Encode(AMRWB_encinst_t_* enc_inst, int16_t* input,
 //                            int16_t len, int16_t* output, int16_t mode);
-// int16_t WebRtcAmrWb_EncoderInit(AMRWB_encinst_t_* encInst,
-//                                 int16_t dtxMode);
-// int16_t WebRtcAmrWb_EncodeBitmode(AMRWB_encinst_t_* encInst,
+// int16_t WebRtcAmrWb_EncoderInit(AMRWB_encinst_t_* enc_inst,
+//                                 int16_t dtx_mode);
+// int16_t WebRtcAmrWb_EncodeBitmode(AMRWB_encinst_t_* enc_inst,
 //                                    int format);
-// int16_t WebRtcAmrWb_Decode(AMRWB_decinst_t_* decInst);
-// int16_t WebRtcAmrWb_DecodePlc(AMRWB_decinst_t_* decInst);
-// int16_t WebRtcAmrWb_DecoderInit(AMRWB_decinst_t_* decInst);
-// int16_t WebRtcAmrWb_DecodeBitmode(AMRWB_decinst_t_* decInst,
+// int16_t WebRtcAmrWb_Decode(AMRWB_decinst_t_* dec_inst);
+// int16_t WebRtcAmrWb_DecodePlc(AMRWB_decinst_t_* dec_inst);
+// int16_t WebRtcAmrWb_DecoderInit(AMRWB_decinst_t_* dec_inst);
+// int16_t WebRtcAmrWb_DecodeBitmode(AMRWB_decinst_t_* dec_inst,
 //                                   int format);
 #include "amrwb_interface.h"
 #endif
@@ -46,30 +47,29 @@
 namespace webrtc {
 
 #ifndef WEBRTC_CODEC_AMRWB
-ACMAMRwb::ACMAMRwb(WebRtc_Word16 /* codecID*/)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL),
-      _encodingMode(-1),  // invalid value
-      _encodingRate(0),  // invalid value
-      _encoderPackingFormat(AMRBandwidthEfficient),
-      _decoderPackingFormat(AMRBandwidthEfficient) {
-  return;
+ACMAMRwb::ACMAMRwb(WebRtc_Word16 /* codec_id */)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL),
+      encoding_mode_(-1),  // invalid value
+      encoding_rate_(0),  // invalid value
+      encoder_packing_format_(AMRBandwidthEfficient),
+      decoder_packing_format_(AMRBandwidthEfficient) {
 }
 
 ACMAMRwb::~ACMAMRwb() {
-  return;
 }
 
-WebRtc_Word16 ACMAMRwb::InternalEncode(WebRtc_UWord8* /* bitStream */,
-                                       WebRtc_Word16* /* bitStreamLenByte */) {
+WebRtc_Word16 ACMAMRwb::InternalEncode(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
-WebRtc_Word16 ACMAMRwb::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                   WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMAMRwb::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                   WebRtc_Word16 /* bitstream_len_byte */,
                                    WebRtc_Word16* /* audio */,
-                                   WebRtc_Word16* /* audioSamples */,
-                                   WebRtc_Word8* /* speechType */) {
+                                   WebRtc_Word16* /* audio_samples */,
+                                   WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
@@ -82,17 +82,17 @@
 }
 
 WebRtc_Word16 ACMAMRwb::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMAMRwb::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-WebRtc_Word32 ACMAMRwb::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef */,
-                                 const CodecInst& /* codecInst */) {
+WebRtc_Word32 ACMAMRwb::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def */,
+                                 const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -121,12 +121,12 @@
   return -1;
 }
 
-void ACMAMRwb::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMAMRwb::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
 WebRtc_Word16 ACMAMRwb::SetAMRwbEncoderPackingFormat(
-    ACMAMRPackingFormat /* packingFormat */) {
+    ACMAMRPackingFormat /* packing_format */) {
   return -1;
 }
 
@@ -135,7 +135,7 @@
 }
 
 WebRtc_Word16 ACMAMRwb::SetAMRwbDecoderPackingFormat(
-    ACMAMRPackingFormat /* packingFormat */) {
+    ACMAMRPackingFormat /* packing_format */) {
   return -1;
 }
 
@@ -155,78 +155,78 @@
 #define AMRWB_MODE_23k      7
 #define AMRWB_MODE_24k      8
 
-ACMAMRwb::ACMAMRwb(WebRtc_Word16 codecID)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL),
-      _encodingMode(-1), // invalid value
-      _encodingRate(0) { // invalid value
-  _codecID = codecID;
-  _hasInternalDTX = true;
-  _encoderPackingFormat = AMRBandwidthEfficient;
-  _decoderPackingFormat = AMRBandwidthEfficient;
+ACMAMRwb::ACMAMRwb(WebRtc_Word16 codec_id)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL),
+      encoding_mode_(-1),  // invalid value
+      encoding_rate_(0) {  // invalid value
+  codec_id_ = codec_id;
+  has_internal_dtx_ = true;
+  encoder_packing_format_ = AMRBandwidthEfficient;
+  decoder_packing_format_ = AMRBandwidthEfficient;
   return;
 }
 
 ACMAMRwb::~ACMAMRwb() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcAmrWb_FreeEnc(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcAmrWb_FreeEnc(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
-  if (_decoderInstPtr != NULL) {
-    WebRtcAmrWb_FreeDec(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcAmrWb_FreeDec(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
   return;
 }
 
-WebRtc_Word16 ACMAMRwb::InternalEncode(WebRtc_UWord8* bitStream,
-                                       WebRtc_Word16* bitStreamLenByte) {
-  WebRtc_Word16 vadDecision = 1;
+WebRtc_Word16 ACMAMRwb::InternalEncode(WebRtc_UWord8* bitstream,
+                                       WebRtc_Word16* bitstream_len_byte) {
+  WebRtc_Word16 vad_decision = 1;
   // sanity check, if the rate is set correctly. we might skip this
   // sanity check. if rate is not set correctly, initialization flag
   // should be false and should not be here.
-  if ((_encodingMode < AMRWB_MODE_7k) || (_encodingMode > AMRWB_MODE_24k)) {
-    *bitStreamLenByte = 0;
+  if ((encoding_mode_ < AMRWB_MODE_7k) || (encoding_mode_ > AMRWB_MODE_24k)) {
+    *bitstream_len_byte = 0;
     return -1;
   }
-  *bitStreamLenByte = WebRtcAmrWb_Encode(_encoderInstPtr,
-                                         &_inAudio[_inAudioIxRead],
-                                         _frameLenSmpl,
-                                         (WebRtc_Word16*) bitStream,
-                                         _encodingMode);
+  *bitstream_len_byte = WebRtcAmrWb_Encode(encoder_inst_ptr_,
+                                           &in_audio_[in_audio_ix_read_],
+                                           frame_len_smpl_,
+                                           (WebRtc_Word16*)bitstream,
+                                           encoding_mode_);
 
   // Update VAD, if internal DTX is used
-  if (_hasInternalDTX && _dtxEnabled) {
-    if (*bitStreamLenByte <= (7 * _frameLenSmpl / 160)) {
-      vadDecision = 0;
+  if (has_internal_dtx_ && dtx_enabled_) {
+    if (*bitstream_len_byte <= (7 * frame_len_smpl_ / 160)) {
+      vad_decision = 0;
     }
     for (WebRtc_Word16 n = 0; n < MAX_FRAME_SIZE_10MSEC; n++) {
-      _vadLabel[n] = vadDecision;
+      vad_label_[n] = vad_decision;
     }
   }
   // increment the read index this tell the caller that how far
   // we have gone forward in reading the audio buffer
-  _inAudioIxRead += _frameLenSmpl;
-  return *bitStreamLenByte;
+  in_audio_ix_read_ += frame_len_smpl_;
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMAMRwb::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                   WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMAMRwb::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                   WebRtc_Word16 /* bitstream_len_byte */,
                                    WebRtc_Word16* /* audio */,
-                                   WebRtc_Word16* /* audioSamples */,
-                                   WebRtc_Word8* /* speechType */) {
+                                   WebRtc_Word16* /* audio_samples */,
+                                   WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
 WebRtc_Word16 ACMAMRwb::EnableDTX() {
-  if (_dtxEnabled) {
+  if (dtx_enabled_) {
     return 0;
-  } else if (_encoderExist) { // check if encoder exist
+  } else if (encoder_exist_) {  // check if encoder exist
     // enable DTX
-    if (WebRtcAmrWb_EncoderInit(_encoderInstPtr, 1) < 0) {
+    if (WebRtcAmrWb_EncoderInit(encoder_inst_ptr_, 1) < 0) {
       return -1;
     }
-    _dtxEnabled = true;
+    dtx_enabled_ = true;
     return 0;
   } else {
     return -1;
@@ -234,14 +234,14 @@
 }
 
 WebRtc_Word16 ACMAMRwb::DisableDTX() {
-  if (!_dtxEnabled) {
+  if (!dtx_enabled_) {
     return 0;
-  } else if (_encoderExist) { // check if encoder exist
+  } else if (encoder_exist_) {  // check if encoder exist
     // disable DTX
-    if (WebRtcAmrWb_EncoderInit(_encoderInstPtr, 0) < 0) {
+    if (WebRtcAmrWb_EncoderInit(encoder_inst_ptr_, 0) < 0) {
       return -1;
     }
-    _dtxEnabled = false;
+    dtx_enabled_ = false;
     return 0;
   } else {
     // encoder doesn't exists, therefore disabling is harmless
@@ -249,31 +249,32 @@
   }
 }
 
-WebRtc_Word16 ACMAMRwb::InternalInitEncoder(WebRtcACMCodecParams* codecParams) {
+WebRtc_Word16 ACMAMRwb::InternalInitEncoder(
+    WebRtcACMCodecParams* codec_params) {
   // sanity check
-  if (_encoderInstPtr == NULL) {
+  if (encoder_inst_ptr_ == NULL) {
     return -1;
   }
 
-  WebRtc_Word16 status = SetBitRateSafe((codecParams->codecInstant).rate);
+  WebRtc_Word16 status = SetBitRateSafe((codec_params->codec_inst).rate);
   status += (WebRtcAmrWb_EncoderInit(
-      _encoderInstPtr, ((codecParams->enableDTX) ? 1 : 0)) < 0) ? -1 : 0;
+      encoder_inst_ptr_, ((codec_params->enable_dtx) ? 1 : 0)) < 0) ? -1 : 0;
   status += (WebRtcAmrWb_EncodeBitmode(
-      _encoderInstPtr, _encoderPackingFormat) < 0) ? -1 : 0;
+      encoder_inst_ptr_, encoder_packing_format_) < 0) ? -1 : 0;
   return (status < 0) ? -1 : 0;
 }
 
 WebRtc_Word16 ACMAMRwb::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
-  WebRtc_Word16 status = WebRtcAmrWb_DecodeBitmode(_decoderInstPtr,
-                                                   _decoderPackingFormat);
-  status += ((WebRtcAmrWb_DecoderInit(_decoderInstPtr) < 0) ? -1 : 0);
+    WebRtcACMCodecParams* /* codec_params */) {
+  WebRtc_Word16 status = WebRtcAmrWb_DecodeBitmode(decoder_inst_ptr_,
+                                                   decoder_packing_format_);
+  status += ((WebRtcAmrWb_DecoderInit(decoder_inst_ptr_) < 0) ? -1 : 0);
   return (status < 0) ? -1 : 0;
 }
 
-WebRtc_Word32 ACMAMRwb::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                 const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
+WebRtc_Word32 ACMAMRwb::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                 const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
     return -1;
   }
 
@@ -281,9 +282,9 @@
   // "SET_CODEC_PAR" & "SET_AMRWB_FUNCTION."
   // Then call NetEQ to add the codec to it's
   // database.
-  SET_CODEC_PAR((codecDef), kDecoderAMRWB, codecInst.pltype, _decoderInstPtr,
-                16000);
-  SET_AMRWB_FUNCTIONS((codecDef));
+  SET_CODEC_PAR((codec_def), kDecoderAMRWB, codec_inst.pltype,
+                decoder_inst_ptr_, 16000);
+  SET_AMRWB_FUNCTIONS((codec_def));
   return 0;
 }
 
@@ -292,80 +293,80 @@
 }
 
 WebRtc_Word16 ACMAMRwb::InternalCreateEncoder() {
-  return WebRtcAmrWb_CreateEnc(&_encoderInstPtr);
+  return WebRtcAmrWb_CreateEnc(&encoder_inst_ptr_);
 }
 
 void ACMAMRwb::DestructEncoderSafe() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcAmrWb_FreeEnc(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcAmrWb_FreeEnc(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
   // there is no encoder set the following
-  _encoderExist = false;
-  _encoderInitialized = false;
-  _encodingMode = -1; // invalid value
-  _encodingRate = 0;
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
+  encoding_mode_ = -1;  // invalid value
+  encoding_rate_ = 0;
 }
 
 WebRtc_Word16 ACMAMRwb::InternalCreateDecoder() {
-  return WebRtcAmrWb_CreateDec(&_decoderInstPtr);
+  return WebRtcAmrWb_CreateDec(&decoder_inst_ptr_);
 }
 
 void ACMAMRwb::DestructDecoderSafe() {
-  if (_decoderInstPtr != NULL) {
-    WebRtcAmrWb_FreeDec(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcAmrWb_FreeDec(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
   // there is no encoder instance set the followings
-  _decoderExist = false;
-  _decoderInitialized = false;
+  decoder_exist_ = false;
+  decoder_initialized_ = false;
 }
 
 WebRtc_Word16 ACMAMRwb::SetBitRateSafe(const WebRtc_Word32 rate) {
   switch (rate) {
     case 7000: {
-      _encodingMode = AMRWB_MODE_7k;
-      _encodingRate = 7000;
+      encoding_mode_ = AMRWB_MODE_7k;
+      encoding_rate_ = 7000;
       break;
     }
     case 9000: {
-      _encodingMode = AMRWB_MODE_9k;
-      _encodingRate = 9000;
+      encoding_mode_ = AMRWB_MODE_9k;
+      encoding_rate_ = 9000;
       break;
     }
     case 12000: {
-      _encodingMode = AMRWB_MODE_12k;
-      _encodingRate = 12000;
+      encoding_mode_ = AMRWB_MODE_12k;
+      encoding_rate_ = 12000;
       break;
     }
     case 14000: {
-      _encodingMode = AMRWB_MODE_14k;
-      _encodingRate = 14000;
+      encoding_mode_ = AMRWB_MODE_14k;
+      encoding_rate_ = 14000;
       break;
     }
     case 16000: {
-      _encodingMode = AMRWB_MODE_16k;
-      _encodingRate = 16000;
+      encoding_mode_ = AMRWB_MODE_16k;
+      encoding_rate_ = 16000;
       break;
     }
     case 18000: {
-      _encodingMode = AMRWB_MODE_18k;
-      _encodingRate = 18000;
+      encoding_mode_ = AMRWB_MODE_18k;
+      encoding_rate_ = 18000;
       break;
     }
     case 20000: {
-      _encodingMode = AMRWB_MODE_20k;
-      _encodingRate = 20000;
+      encoding_mode_ = AMRWB_MODE_20k;
+      encoding_rate_ = 20000;
       break;
     }
     case 23000: {
-      _encodingMode = AMRWB_MODE_23k;
-      _encodingRate = 23000;
+      encoding_mode_ = AMRWB_MODE_23k;
+      encoding_rate_ = 23000;
       break;
     }
     case 24000: {
-      _encodingMode = AMRWB_MODE_24k;
-      _encodingRate = 24000;
+      encoding_mode_ = AMRWB_MODE_24k;
+      encoding_rate_ = 24000;
       break;
     }
     default: {
@@ -375,57 +376,57 @@
   return 0;
 }
 
-void ACMAMRwb::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    WebRtcAmrWb_FreeEnc(static_cast<AMRWB_encinst_t_*>(ptrInst));
+void ACMAMRwb::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    WebRtcAmrWb_FreeEnc(static_cast<AMRWB_encinst_t_*>(ptr_inst));
   }
   return;
 }
 
 WebRtc_Word16 ACMAMRwb::SetAMRwbEncoderPackingFormat(
-    ACMAMRPackingFormat packingFormat) {
-  if ((packingFormat != AMRBandwidthEfficient) &&
-      (packingFormat != AMROctetAlligned) &&
-      (packingFormat != AMRFileStorage)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    ACMAMRPackingFormat packing_format) {
+  if ((packing_format != AMRBandwidthEfficient) &&
+      (packing_format != AMROctetAlligned) &&
+      (packing_format != AMRFileStorage)) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Invalid AMRwb encoder packing-format.");
     return -1;
   } else {
-    if (WebRtcAmrWb_EncodeBitmode(_encoderInstPtr, packingFormat) < 0) {
+    if (WebRtcAmrWb_EncodeBitmode(encoder_inst_ptr_, packing_format) < 0) {
       return -1;
     } else {
-      _encoderPackingFormat = packingFormat;
+      encoder_packing_format_ = packing_format;
       return 0;
     }
   }
 }
 
 ACMAMRPackingFormat ACMAMRwb::AMRwbEncoderPackingFormat() const {
-  return _encoderPackingFormat;
+  return encoder_packing_format_;
 }
 
 WebRtc_Word16 ACMAMRwb::SetAMRwbDecoderPackingFormat(
-    ACMAMRPackingFormat packingFormat) {
-  if ((packingFormat != AMRBandwidthEfficient) &&
-      (packingFormat != AMROctetAlligned) &&
-      (packingFormat != AMRFileStorage)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    ACMAMRPackingFormat packing_format) {
+  if ((packing_format != AMRBandwidthEfficient) &&
+      (packing_format != AMROctetAlligned) &&
+      (packing_format != AMRFileStorage)) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Invalid AMRwb decoder packing-format.");
     return -1;
   } else {
-    if (WebRtcAmrWb_DecodeBitmode(_decoderInstPtr, packingFormat) < 0) {
+    if (WebRtcAmrWb_DecodeBitmode(decoder_inst_ptr_, packing_format) < 0) {
       return -1;
     } else {
-      _decoderPackingFormat = packingFormat;
+      decoder_packing_format_ = packing_format;
       return 0;
     }
   }
 }
 
 ACMAMRPackingFormat ACMAMRwb::AMRwbDecoderPackingFormat() const {
-  return _decoderPackingFormat;
+  return decoder_packing_format_;
 }
 
 #endif
 
-} // namespace webrtc
+}  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_amrwb.h b/webrtc/modules/audio_coding/main/source/acm_amrwb.h
index 126302c..0f8d0bb 100644
--- a/webrtc/modules/audio_coding/main/source/acm_amrwb.h
+++ b/webrtc/modules/audio_coding/main/source/acm_amrwb.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_AMRWB_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_AMRWB_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 // forward declaration
 struct AMRWB_encinst_t_;
@@ -19,40 +19,39 @@
 
 namespace webrtc {
 
-enum ACMAMRPackingFormat;
-
 class ACMAMRwb: public ACMGenericCodec {
  public:
-  ACMAMRwb(WebRtc_Word16 codecID);
+  explicit ACMAMRwb(WebRtc_Word16 codec_id);
   ~ACMAMRwb();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams* codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams* codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams* codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams* codec_params);
 
   WebRtc_Word16 SetAMRwbEncoderPackingFormat(
-      const ACMAMRPackingFormat packingFormat);
+      const ACMAMRPackingFormat packing_format);
 
   ACMAMRPackingFormat AMRwbEncoderPackingFormat() const;
 
   WebRtc_Word16 SetAMRwbDecoderPackingFormat(
-      const ACMAMRPackingFormat packingFormat);
+      const ACMAMRPackingFormat packing_format);
 
   ACMAMRPackingFormat AMRwbDecoderPackingFormat() const;
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
-                           WebRtc_Word16* audio, WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
+                           WebRtc_Word16* audio, WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -62,7 +61,7 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   WebRtc_Word16 SetBitRateSafe(const WebRtc_Word32 rate);
 
@@ -70,15 +69,15 @@
 
   WebRtc_Word16 DisableDTX();
 
-  AMRWB_encinst_t_* _encoderInstPtr;
-  AMRWB_decinst_t_* _decoderInstPtr;
+  AMRWB_encinst_t_* encoder_inst_ptr_;
+  AMRWB_decinst_t_* decoder_inst_ptr_;
 
-  WebRtc_Word16 _encodingMode;
-  WebRtc_Word16 _encodingRate;
-  ACMAMRPackingFormat _encoderPackingFormat;
-  ACMAMRPackingFormat _decoderPackingFormat;
+  WebRtc_Word16 encoding_mode_;
+  WebRtc_Word16 encoding_rate_;
+  ACMAMRPackingFormat encoder_packing_format_;
+  ACMAMRPackingFormat decoder_packing_format_;
 };
 
-} // namespace webrtc
+}  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_AMRWB_H_
diff --git a/webrtc/modules/audio_coding/main/source/acm_celt.cc b/webrtc/modules/audio_coding/main/source/acm_celt.cc
index d9678fd..e6ceda4 100644
--- a/webrtc/modules/audio_coding/main/source/acm_celt.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_celt.cc
@@ -8,13 +8,13 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "acm_celt.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
-// TODO(tlegrand): Add full paths.
+#include "webrtc/modules/audio_coding/main/source/acm_celt.h"
+
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 #ifdef WEBRTC_CODEC_CELT
 // NOTE! Celt is not included in the open-source package. Modify this file or
@@ -26,7 +26,7 @@
 
 #ifndef WEBRTC_CODEC_CELT
 
-ACMCELT::ACMCELT(int16_t /* codecID */)
+ACMCELT::ACMCELT(int16_t /* codec_id */)
     : enc_inst_ptr_(NULL),
       dec_inst_ptr_(NULL),
       sampling_freq_(0),
@@ -40,29 +40,29 @@
   return;
 }
 
-int16_t ACMCELT::InternalEncode(uint8_t* /* bitStream */,
-                                int16_t* /* bitStreamLenByte */) {
+int16_t ACMCELT::InternalEncode(uint8_t* /* bitstream */,
+                                int16_t* /* bitstream_len_byte */) {
   return -1;
 }
 
-int16_t ACMCELT::DecodeSafe(uint8_t* /* bitStream */,
-                            int16_t /* bitStreamLenByte */,
+int16_t ACMCELT::DecodeSafe(uint8_t* /* bitstream */,
+                            int16_t /* bitstream_len_byte */,
                             int16_t* /* audio */,
-                            int16_t* /* audioSamples */,
-                            WebRtc_Word8* /* speechType */) {
+                            int16_t* /* audio_samples */,
+                            WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
-int16_t ACMCELT::InternalInitEncoder(WebRtcACMCodecParams* /* codecParams */) {
+int16_t ACMCELT::InternalInitEncoder(WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-int16_t ACMCELT::InternalInitDecoder(WebRtcACMCodecParams* /* codecParams */) {
+int16_t ACMCELT::InternalInitDecoder(WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-int32_t ACMCELT::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef  */,
-                          const CodecInst& /* codecInst */) {
+int32_t ACMCELT::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def  */,
+                          const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -86,7 +86,7 @@
   return;
 }
 
-void ACMCELT::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMCELT::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
@@ -103,7 +103,7 @@
 
 #else  //===================== Actual Implementation =======================
 
-ACMCELT::ACMCELT(int16_t codecID)
+ACMCELT::ACMCELT(int16_t codec_id)
     : enc_inst_ptr_(NULL),
       dec_inst_ptr_(NULL),
       sampling_freq_(32000),  // Default sampling frequency.
@@ -111,7 +111,7 @@
       channels_(1),  // Default send mono.
       dec_channels_(1) {  // Default receive mono.
   // TODO(tlegrand): remove later when ACMGenericCodec has a new constructor.
-  _codecID = codecID;
+  codec_id_ = codec_id;
 
   return;
 }
@@ -128,52 +128,53 @@
   return;
 }
 
-int16_t ACMCELT::InternalEncode(uint8_t* bitStream, int16_t* bitStreamLenByte) {
-  *bitStreamLenByte = 0;
+int16_t ACMCELT::InternalEncode(uint8_t* bitstream,
+                                int16_t* bitstream_len_byte) {
+  *bitstream_len_byte = 0;
 
   // Call Encoder.
-  *bitStreamLenByte = WebRtcCelt_Encode(enc_inst_ptr_,
-                                        &_inAudio[_inAudioIxRead],
-                                        bitStream);
+  *bitstream_len_byte = WebRtcCelt_Encode(enc_inst_ptr_,
+                                          &in_audio_[in_audio_ix_read_],
+                                          bitstream);
 
   // Increment the read index this tell the caller that how far
   // we have gone forward in reading the audio buffer.
-  _inAudioIxRead += _frameLenSmpl * channels_;
+  in_audio_ix_read_ += frame_len_smpl_ * channels_;
 
-  if (*bitStreamLenByte < 0) {
+  if (*bitstream_len_byte < 0) {
     // Error reported from the encoder.
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalEncode: Encode error for Celt");
-    *bitStreamLenByte = 0;
+    *bitstream_len_byte = 0;
     return -1;
   }
 
-  return *bitStreamLenByte;
+  return *bitstream_len_byte;
 }
 
-int16_t ACMCELT::DecodeSafe(uint8_t* /* bitStream */,
-                            int16_t /* bitStreamLenByte */,
+int16_t ACMCELT::DecodeSafe(uint8_t* /* bitstream */,
+                            int16_t /* bitstream_len_byte */,
                             int16_t* /* audio */,
-                            int16_t* /* audioSamples */,
-                            WebRtc_Word8* /* speechType */) {
+                            int16_t* /* audio_samples */,
+                            WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
-int16_t ACMCELT::InternalInitEncoder(WebRtcACMCodecParams* codecParams) {
+int16_t ACMCELT::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
   // Set bitrate and check that it is within the valid range.
-  int16_t status = SetBitRateSafe((codecParams->codecInstant).rate);
+  int16_t status = SetBitRateSafe((codec_params->codec_inst).rate);
   if (status < 0) {
     return -1;
   }
 
   // If number of channels changed we need to re-create memory.
-  if (codecParams->codecInstant.channels != channels_) {
+  if (codec_params->codec_inst.channels != channels_) {
     WebRtcCelt_FreeEnc(enc_inst_ptr_);
     enc_inst_ptr_ = NULL;
     // Store new number of channels.
-    channels_ = codecParams->codecInstant.channels;
+    channels_ = codec_params->codec_inst.channels;
     if (WebRtcCelt_CreateEnc(&enc_inst_ptr_, channels_) < 0) {
-       return -1;
+      return -1;
     }
   }
 
@@ -185,36 +186,36 @@
   }
 }
 
-int16_t ACMCELT::InternalInitDecoder(WebRtcACMCodecParams* codecParams) {
+int16_t ACMCELT::InternalInitDecoder(WebRtcACMCodecParams* codec_params) {
   // If number of channels changed we need to re-create memory.
-  if (codecParams->codecInstant.channels != dec_channels_) {
+  if (codec_params->codec_inst.channels != dec_channels_) {
     WebRtcCelt_FreeDec(dec_inst_ptr_);
     dec_inst_ptr_ = NULL;
     // Store new number of channels.
-    dec_channels_ = codecParams->codecInstant.channels;
+    dec_channels_ = codec_params->codec_inst.channels;
     if (WebRtcCelt_CreateDec(&dec_inst_ptr_, dec_channels_) < 0) {
-       return -1;
+      return -1;
     }
   }
 
   // Initiate decoder, both master and slave parts.
   if (WebRtcCelt_DecoderInit(dec_inst_ptr_) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalInitDecoder: init decoder failed for Celt.");
     return -1;
   }
   if (WebRtcCelt_DecoderInitSlave(dec_inst_ptr_) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalInitDecoder: init decoder failed for Celt.");
     return -1;
   }
   return 0;
 }
 
-int32_t ACMCELT::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                          const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+int32_t ACMCELT::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                          const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "CodecDef: Decoder uninitialized for Celt");
     return -1;
   }
@@ -223,20 +224,20 @@
   // "SET_CODEC_PAR" and "SET_CELT_FUNCTIONS" or "SET_CELTSLAVE_FUNCTIONS".
   // Then call NetEQ to add the codec to it's
   // database.
-  if (codecInst.channels == 1) {
-    SET_CODEC_PAR(codecDef, kDecoderCELT_32, codecInst.pltype, dec_inst_ptr_,
+  if (codec_inst.channels == 1) {
+    SET_CODEC_PAR(codec_def, kDecoderCELT_32, codec_inst.pltype, dec_inst_ptr_,
                   32000);
   } else {
-    SET_CODEC_PAR(codecDef, kDecoderCELT_32_2ch, codecInst.pltype,
+    SET_CODEC_PAR(codec_def, kDecoderCELT_32_2ch, codec_inst.pltype,
                   dec_inst_ptr_, 32000);
   }
 
   // If this is the master of NetEQ, regular decoder will be added, otherwise
   // the slave decoder will be used.
-  if (_isMaster) {
-    SET_CELT_FUNCTIONS(codecDef);
+  if (is_master_) {
+    SET_CELT_FUNCTIONS(codec_def);
   } else {
-    SET_CELTSLAVE_FUNCTIONS(codecDef);
+    SET_CELTSLAVE_FUNCTIONS(codec_def);
   }
   return 0;
 }
@@ -246,18 +247,18 @@
 }
 
 int16_t ACMCELT::InternalCreateEncoder() {
-  if (WebRtcCelt_CreateEnc(&enc_inst_ptr_, _noChannels) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  if (WebRtcCelt_CreateEnc(&enc_inst_ptr_, num_channels_) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalCreateEncoder: create encoder failed for Celt");
     return -1;
   }
-  channels_ = _noChannels;
+  channels_ = num_channels_;
   return 0;
 }
 
 void ACMCELT::DestructEncoderSafe() {
-  _encoderExist = false;
-  _encoderInitialized = false;
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
   if (enc_inst_ptr_ != NULL) {
     WebRtcCelt_FreeEnc(enc_inst_ptr_);
     enc_inst_ptr_ = NULL;
@@ -266,7 +267,7 @@
 
 int16_t ACMCELT::InternalCreateDecoder() {
   if (WebRtcCelt_CreateDec(&dec_inst_ptr_, dec_channels_) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalCreateDecoder: create decoder failed for Celt");
     return -1;
   }
@@ -275,17 +276,17 @@
 }
 
 void ACMCELT::DestructDecoderSafe() {
-  _decoderExist = false;
-  _decoderInitialized = false;
+  decoder_exist_ = false;
+  decoder_initialized_ = false;
   if (dec_inst_ptr_ != NULL) {
     WebRtcCelt_FreeDec(dec_inst_ptr_);
     dec_inst_ptr_ = NULL;
   }
 }
 
-void ACMCELT::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    WebRtcCelt_FreeEnc(static_cast<CELT_encinst_t*>(ptrInst));
+void ACMCELT::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    WebRtcCelt_FreeEnc(static_cast<CELT_encinst_t*>(ptr_inst));
   }
   return;
 }
@@ -304,13 +305,13 @@
     if (WebRtcCelt_EncoderInit(enc_inst_ptr_, channels_, bitrate_) >= 0) {
       return 0;
     } else {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "SetBitRateSafe: Failed to initiate Celt with rate %d",
                    rate);
       return -1;
     }
   } else {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "SetBitRateSafe: Invalid rate Celt, %d", rate);
     return -1;
   }
diff --git a/webrtc/modules/audio_coding/main/source/acm_celt.h b/webrtc/modules/audio_coding/main/source/acm_celt.h
index 18e36dd..4f6953e 100644
--- a/webrtc/modules/audio_coding/main/source/acm_celt.h
+++ b/webrtc/modules/audio_coding/main/source/acm_celt.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_CELT_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_CELT_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 // forward declaration
 struct CELT_encinst_t_;
@@ -21,29 +21,29 @@
 
 class ACMCELT : public ACMGenericCodec {
  public:
-  ACMCELT(int16_t codecID);
+  explicit ACMCELT(int16_t codec_id);
   ~ACMCELT();
 
   ACMGenericCodec* CreateInstance(void);
 
-  int16_t InternalEncode(uint8_t* bitstream, int16_t* bitStreamLenByte);
+  int16_t InternalEncode(uint8_t* bitstream, int16_t* bitstream_len_byte);
 
-  int16_t InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  int16_t InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  int16_t InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  int16_t InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-
   WebRtc_Word16 DecodeSafe(
-      uint8_t* /* bitStream */,
-      int16_t /* bitStreamLenByte */,
+      uint8_t* /* bitstream */,
+      int16_t /* bitstream_len_byte */,
       int16_t* /* audio */,
-      int16_t* /* audioSamples */,
+      int16_t* /* audio_samples */,
       // TODO(leozwang): use int8_t here when WebRtc_Word8 is properly typed.
       // http://code.google.com/p/webrtc/issues/detail?id=311
-      WebRtc_Word8* /* speechType */);
+      WebRtc_Word8* /* speech_type */);
 
-  int32_t CodecDef(WebRtcNetEQ_CodecDef& codecDef, const CodecInst& codecInst);
+  int32_t CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                   const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -53,7 +53,7 @@
 
   int16_t InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   bool IsTrueStereoCodec();
 
@@ -69,6 +69,6 @@
   uint16_t dec_channels_;
 };
 
-} // namespace webrtc
+}  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_CELT_H_
diff --git a/webrtc/modules/audio_coding/main/source/acm_cng.cc b/webrtc/modules/audio_coding/main/source/acm_cng.cc
index 4edfc05..ff8cea0 100644
--- a/webrtc/modules/audio_coding/main/source/acm_cng.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_cng.cc
@@ -8,33 +8,34 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_cng.h"
-#include "acm_codec_database.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_cng.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_cng.h"
+
+#include "webrtc/modules/audio_coding/codecs/cng/include/webrtc_cng.h"
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 namespace webrtc {
 
-ACMCNG::ACMCNG(WebRtc_Word16 codecID) {
-  _encoderInstPtr = NULL;
-  _decoderInstPtr = NULL;
-  _codecID = codecID;
-  _sampFreqHz = ACMCodecDB::CodecFreq(_codecID);
+ACMCNG::ACMCNG(WebRtc_Word16 codec_id) {
+  encoder_inst_ptr_ = NULL;
+  decoder_inst_ptr_ = NULL;
+  codec_id_ = codec_id;
+  samp_freq_hz_ = ACMCodecDB::CodecFreq(codec_id_);
   return;
 }
 
 ACMCNG::~ACMCNG() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcCng_FreeEnc(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcCng_FreeEnc(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
-  if (_decoderInstPtr != NULL) {
-    WebRtcCng_FreeDec(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcCng_FreeDec(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
   return;
 }
@@ -43,16 +44,16 @@
 // should not be called normally
 // instead the following function is called from inside
 // ACMGenericCodec::ProcessFrameVADDTX
-WebRtc_Word16 ACMCNG::InternalEncode(WebRtc_UWord8* /* bitStream */,
-                                     WebRtc_Word16* /* bitStreamLenByte */) {
+WebRtc_Word16 ACMCNG::InternalEncode(WebRtc_UWord8* /* bitstream */,
+                                     WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
-WebRtc_Word16 ACMCNG::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                 WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMCNG::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                 WebRtc_Word16 /* bitstream_len_byte */,
                                  WebRtc_Word16* /* audio */,
-                                 WebRtc_Word16* /* audioSamples */,
-                                 WebRtc_Word8* /* speechType */) {
+                                 WebRtc_Word16* /* audio_samples */,
+                                 WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
@@ -61,19 +62,19 @@
 // instead the following function is called from inside
 // ACMGenericCodec::ProcessFrameVADDTX
 WebRtc_Word16 ACMCNG::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMCNG::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
-  return WebRtcCng_InitDec(_decoderInstPtr);
+    WebRtcACMCodecParams* /* codec_params */) {
+  return WebRtcCng_InitDec(decoder_inst_ptr_);
 }
 
-WebRtc_Word32 ACMCNG::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                               const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
-    // TODO (tlegrand): log error
+WebRtc_Word32 ACMCNG::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                               const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
+    // TODO(tlegrand): log error
     return -1;
   }
   // Fill up the structure by calling
@@ -81,11 +82,11 @@
   // Then return the structure back to NetEQ to add the codec to it's
   // database.
 
-  if (_sampFreqHz == 8000 || _sampFreqHz == 16000 || _sampFreqHz == 32000 ||
-      _sampFreqHz == 48000) {
-    SET_CODEC_PAR((codecDef), kDecoderCNG, codecInst.pltype,
-        _decoderInstPtr, _sampFreqHz);
-    SET_CNG_FUNCTIONS((codecDef));
+  if (samp_freq_hz_ == 8000 || samp_freq_hz_ == 16000 ||
+      samp_freq_hz_ == 32000 || samp_freq_hz_ == 48000) {
+    SET_CODEC_PAR((codec_def), kDecoderCNG, codec_inst.pltype,
+                  decoder_inst_ptr_, samp_freq_hz_);
+    SET_CNG_FUNCTIONS((codec_def));
     return 0;
   } else {
     return -1;
@@ -97,8 +98,8 @@
 }
 
 WebRtc_Word16 ACMCNG::InternalCreateEncoder() {
-  if (WebRtcCng_CreateEnc(&_encoderInstPtr) < 0) {
-    _encoderInstPtr = NULL;
+  if (WebRtcCng_CreateEnc(&encoder_inst_ptr_) < 0) {
+    encoder_inst_ptr_ = NULL;
     return -1;
   } else {
     return 0;
@@ -106,17 +107,17 @@
 }
 
 void ACMCNG::DestructEncoderSafe() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcCng_FreeEnc(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcCng_FreeEnc(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
-  _encoderExist = false;
-  _encoderInitialized = false;
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
 }
 
 WebRtc_Word16 ACMCNG::InternalCreateDecoder() {
-  if (WebRtcCng_CreateDec(&_decoderInstPtr) < 0) {
-    _decoderInstPtr = NULL;
+  if (WebRtcCng_CreateDec(&decoder_inst_ptr_) < 0) {
+    decoder_inst_ptr_ = NULL;
     return -1;
   } else {
     return 0;
@@ -124,19 +125,19 @@
 }
 
 void ACMCNG::DestructDecoderSafe() {
-  if (_decoderInstPtr != NULL) {
-    WebRtcCng_FreeDec(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcCng_FreeDec(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
-  _decoderExist = false;
-  _decoderInitialized = false;
+  decoder_exist_ = false;
+  decoder_initialized_ = false;
 }
 
-void ACMCNG::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    WebRtcCng_FreeEnc(static_cast<CNG_enc_inst*>(ptrInst));
+void ACMCNG::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    WebRtcCng_FreeEnc(static_cast<CNG_enc_inst*>(ptr_inst));
   }
   return;
 }
 
-} // namespace webrtc
+}  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_cng.h b/webrtc/modules/audio_coding/main/source/acm_cng.h
index d204d02..3f77a85 100644
--- a/webrtc/modules/audio_coding/main/source/acm_cng.h
+++ b/webrtc/modules/audio_coding/main/source/acm_cng.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_CNG_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_CNG_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 // forward declaration
 struct WebRtcCngEncInst;
@@ -21,26 +21,27 @@
 
 class ACMCNG: public ACMGenericCodec {
  public:
-  ACMCNG(WebRtc_Word16 codecID);
+  explicit ACMCNG(WebRtc_Word16 codec_id);
   ~ACMCNG();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
-protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
-                           WebRtc_Word16* audio, WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+ protected:
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
+                           WebRtc_Word16* audio, WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -50,7 +51,7 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   WebRtc_Word16 EnableDTX() {
     return -1;
@@ -60,11 +61,11 @@
     return -1;
   }
 
-  WebRtcCngEncInst* _encoderInstPtr;
-  WebRtcCngDecInst* _decoderInstPtr;
-  WebRtc_UWord16 _sampFreqHz;
+  WebRtcCngEncInst* encoder_inst_ptr_;
+  WebRtcCngDecInst* decoder_inst_ptr_;
+  WebRtc_UWord16 samp_freq_hz_;
 };
 
-} // namespace webrtc
+}  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_CNG_H_
diff --git a/webrtc/modules/audio_coding/main/source/acm_codec_database.cc b/webrtc/modules/audio_coding/main/source/acm_codec_database.cc
index b860b8a..9fc66ab 100644
--- a/webrtc/modules/audio_coding/main/source/acm_codec_database.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_codec_database.cc
@@ -15,90 +15,90 @@
 
 // TODO(tlegrand): Change constant input pointers in all functions to constant
 // references, where appropriate.
-#include "acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
 
 #include <stdio.h>
 
-#include "acm_common_defs.h"
-#include "trace.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 // Includes needed to create the codecs.
 // G.711, PCM mu-law and A-law.
-#include "acm_pcma.h"
-#include "acm_pcmu.h"
-#include "g711_interface.h"
+#include "webrtc/modules/audio_coding/codecs/g711/include/g711_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_pcma.h"
+#include "webrtc/modules/audio_coding/main/source/acm_pcmu.h"
 // CNG.
-#include "acm_cng.h"
-#include "webrtc_cng.h"
+#include "webrtc/modules/audio_coding/codecs/cng/include/webrtc_cng.h"
+#include "webrtc/modules/audio_coding/main/source/acm_cng.h"
 // NetEQ.
-#include "webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
 #ifdef WEBRTC_CODEC_ISAC
-    #include "acm_isac.h"
-    #include "acm_isac_macros.h"
-    #include "isac.h"
+#include "webrtc/modules/audio_coding/codecs/isac/main/interface/isac.h"
+#include "webrtc/modules/audio_coding/main/source/acm_isac.h"
+#include "webrtc/modules/audio_coding/main/source/acm_isac_macros.h"
 #endif
 #ifdef WEBRTC_CODEC_ISACFX
-    #include "acm_isac.h"
-    #include "acm_isac_macros.h"
-    #include "isacfix.h"
+#include "webrtc/modules/audio_coding/codecs/isac/fix/interface/isacfix.h"
+#include "webrtc/modules/audio_coding/main/source/acm_isac.h"
+#include "webrtc/modules/audio_coding/main/source/acm_isac_macros.h"
 #endif
 #ifdef WEBRTC_CODEC_PCM16
-    #include "pcm16b.h"
-    #include "acm_pcm16b.h"
+#include "webrtc/modules/audio_coding/codecs/pcm16b/include/pcm16b.h"
+#include "webrtc/modules/audio_coding/main/source/acm_pcm16b.h"
 #endif
 #ifdef WEBRTC_CODEC_ILBC
-    #include "acm_ilbc.h"
-    #include "ilbc.h"
+#include "webrtc/modules/audio_coding/codecs/ilbc/interface/ilbc.h"
+#include "webrtc/modules/audio_coding/main/source/acm_ilbc.h"
 #endif
 #ifdef WEBRTC_CODEC_AMR
-    #include "acm_amr.h"
-    #include "amr_interface.h"
+#include "amr_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_amr.h"
 #endif
 #ifdef WEBRTC_CODEC_AMRWB
-    #include "acm_amrwb.h"
-    #include "amrwb_interface.h"
+#include "amrwb_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_amrwb.h"
 #endif
 #ifdef WEBRTC_CODEC_CELT
-    #include "acm_celt.h"
-    #include "celt_interface.h"
+#include "celt_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_celt.h"
 #endif
 #ifdef WEBRTC_CODEC_G722
-    #include "acm_g722.h"
-    #include "g722_interface.h"
+#include "webrtc/modules/audio_coding/codecs/g722/include/g722_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_g722.h"
 #endif
 #ifdef WEBRTC_CODEC_G722_1
-    #include "acm_g7221.h"
-    #include "g7221_interface.h"
+#include "g7221_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_g7221.h"
 #endif
 #ifdef WEBRTC_CODEC_G722_1C
-    #include "acm_g7221c.h"
-    #include "g7221c_interface.h"
+#include "g7221c_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_g7221c.h"
 #endif
 #ifdef WEBRTC_CODEC_G729
-    #include "acm_g729.h"
-    #include "g729_interface.h"
+#include "g729_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_g729.h"
 #endif
 #ifdef WEBRTC_CODEC_G729_1
-    #include "acm_g7291.h"
-    #include "g7291_interface.h"
+#include "g7291_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_g7291.h"
 #endif
 #ifdef WEBRTC_CODEC_GSMFR
-    #include "acm_gsmfr.h"
-    #include "gsmfr_interface.h"
+#include "gsmfr_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_gsmfr.h"
 #endif
 #ifdef WEBRTC_CODEC_OPUS
-    #include "acm_opus.h"
-    #include "modules/audio_coding/codecs/opus/interface/opus_interface.h"
+#include "webrtc/modules/audio_coding/codecs/opus/interface/opus_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_opus.h"
 #endif
 #ifdef WEBRTC_CODEC_SPEEX
-    #include "acm_speex.h"
-    #include "speex_interface.h"
+#include "speex_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_speex.h"
 #endif
 #ifdef WEBRTC_CODEC_AVT
-    #include "acm_dtmf_playout.h"
+#include "webrtc/modules/audio_coding/main/source/acm_dtmf_playout.h"
 #endif
 #ifdef WEBRTC_CODEC_RED
-    #include "acm_red.h"
+#include "webrtc/modules/audio_coding/main/source/acm_red.h"
 #endif
 
 namespace webrtc {
@@ -108,19 +108,19 @@
 // are defined they will receive reserved fixed payload types (values 69-95).
 const int kDynamicPayloadtypes[ACMCodecDB::kMaxNumCodecs] = {
   107, 108, 109, 111, 112, 113, 114, 115, 116, 117, 92,
-   91,  90,  89,  88,  87,  86,  85,  84,  83,  82,  81, 80,
-   79,  78,  77,  76,  75,  74,  73,  72,  71,  70,  69, 68,
-   67, 66, 65
+  91,  90,  89,  88,  87,  86,  85,  84,  83,  82,  81, 80,
+  79,  78,  77,  76,  75,  74,  73,  72,  71,  70,  69, 68,
+  67, 66, 65
 };
 
 // Creates database with all supported codecs at compile time.
 // Each entry needs the following parameters in the given order:
 // payload type, name, sampling frequency, packet size in samples,
 // number of channels, and default rate.
-#if (defined(WEBRTC_CODEC_AMR) || defined(WEBRTC_CODEC_AMRWB) \
-  || defined(WEBRTC_CODEC_CELT) || defined(WEBRTC_CODEC_G722_1) \
-  || defined(WEBRTC_CODEC_G722_1C) || defined(WEBRTC_CODEC_G729_1) \
-  || defined(WEBRTC_CODEC_PCM16) || defined(WEBRTC_CODEC_SPEEX))
+#if (defined(WEBRTC_CODEC_AMR) || defined(WEBRTC_CODEC_AMRWB) || \
+    defined(WEBRTC_CODEC_CELT) || defined(WEBRTC_CODEC_G722_1) || \
+    defined(WEBRTC_CODEC_G722_1C) || defined(WEBRTC_CODEC_G729_1) || \
+    defined(WEBRTC_CODEC_PCM16) || defined(WEBRTC_CODEC_SPEEX))
 static int count_database = 0;
 #endif
 
@@ -219,180 +219,180 @@
 // Basic block samples, max number of channels that are supported.
 const ACMCodecDB::CodecSettings ACMCodecDB::codec_settings_[] = {
 #if (defined(WEBRTC_CODEC_ISAC) || defined(WEBRTC_CODEC_ISACFX))
-  {2, {kIsacPacSize480, kIsacPacSize960}, 0, 1},
+    {2, {kIsacPacSize480, kIsacPacSize960}, 0, 1},
 # if (defined(WEBRTC_CODEC_ISAC))
-  {1, {kIsacPacSize960}, 0, 1},
-  {1, {kIsacPacSize1440}, 0, 1},
+    {1, {kIsacPacSize960}, 0, 1},
+    {1, {kIsacPacSize1440}, 0, 1},
 # endif
 #endif
 #ifdef WEBRTC_CODEC_PCM16
-  // Mono
-  {4, {80, 160, 240, 320}, 0, 2},
-  {4, {160, 320, 480, 640}, 0, 2},
-  {2, {320, 640}, 0, 2},
-  // Stereo
-  {4, {80, 160, 240, 320}, 0, 2},
-  {4, {160, 320, 480, 640}, 0, 2},
-  {2, {320, 640}, 0, 2},
+    // Mono
+    {4, {80, 160, 240, 320}, 0, 2},
+    {4, {160, 320, 480, 640}, 0, 2},
+    {2, {320, 640}, 0, 2},
+    // Stereo
+    {4, {80, 160, 240, 320}, 0, 2},
+    {4, {160, 320, 480, 640}, 0, 2},
+    {2, {320, 640}, 0, 2},
 #endif
-  // G.711, PCM mu-law and A-law.
-  // Mono
-  {6, {80, 160, 240, 320, 400, 480}, 0, 2},
-  {6, {80, 160, 240, 320, 400, 480}, 0, 2},
-  // Stereo
-  {6, {80, 160, 240, 320, 400, 480}, 0, 2},
-  {6, {80, 160, 240, 320, 400, 480}, 0, 2},
+    // G.711, PCM mu-law and A-law.
+    // Mono
+    {6, {80, 160, 240, 320, 400, 480}, 0, 2},
+    {6, {80, 160, 240, 320, 400, 480}, 0, 2},
+    // Stereo
+    {6, {80, 160, 240, 320, 400, 480}, 0, 2},
+    {6, {80, 160, 240, 320, 400, 480}, 0, 2},
 #ifdef WEBRTC_CODEC_ILBC
-  {4, {160, 240, 320, 480}, 0, 1},
+    {4, {160, 240, 320, 480}, 0, 1},
 #endif
 #ifdef WEBRTC_CODEC_AMR
-  {3, {160, 320, 480}, 0, 1},
+    {3, {160, 320, 480}, 0, 1},
 #endif
 #ifdef WEBRTC_CODEC_AMRWB
-  {3, {320, 640, 960}, 0, 1},
+    {3, {320, 640, 960}, 0, 1},
 #endif
 #ifdef WEBRTC_CODEC_CELT
-  // Mono
-  {1, {640}, 0, 2},
-  // Stereo
-  {1, {640}, 0, 2},
+    // Mono
+    {1, {640}, 0, 2},
+    // Stereo
+    {1, {640}, 0, 2},
 #endif
 #ifdef WEBRTC_CODEC_G722
-  // Mono
-  {6, {160, 320, 480, 640, 800, 960}, 0, 2},
-  // Stereo
-  {6, {160, 320, 480, 640, 800, 960}, 0, 2},
+    // Mono
+    {6, {160, 320, 480, 640, 800, 960}, 0, 2},
+    // Stereo
+    {6, {160, 320, 480, 640, 800, 960}, 0, 2},
 #endif
 #ifdef WEBRTC_CODEC_G722_1
-  {1, {320}, 320, 1},
-  {1, {320}, 320, 1},
-  {1, {320}, 320, 1},
+    {1, {320}, 320, 1},
+    {1, {320}, 320, 1},
+    {1, {320}, 320, 1},
 #endif
 #ifdef WEBRTC_CODEC_G722_1C
-  {1, {640}, 640, 1},
-  {1, {640}, 640, 1},
-  {1, {640}, 640, 1},
+    {1, {640}, 640, 1},
+    {1, {640}, 640, 1},
+    {1, {640}, 640, 1},
 #endif
 #ifdef WEBRTC_CODEC_G729
-  {6, {80, 160, 240, 320, 400, 480}, 0, 1},
+    {6, {80, 160, 240, 320, 400, 480}, 0, 1},
 #endif
 #ifdef WEBRTC_CODEC_G729_1
-  {3, {320, 640, 960}, 0, 1},
+    {3, {320, 640, 960}, 0, 1},
 #endif
 #ifdef WEBRTC_CODEC_GSMFR
-  {3, {160, 320, 480}, 160, 1},
+    {3, {160, 320, 480}, 160, 1},
 #endif
 #ifdef WEBRTC_CODEC_OPUS
-  // Opus supports frames shorter than 10ms,
-  // but it doesn't help us to use them.
-  // Mono and stereo.
-  {1, {960}, 0, 2},
+    // Opus supports frames shorter than 10ms,
+    // but it doesn't help us to use them.
+    // Mono and stereo.
+    {1, {960}, 0, 2},
 #endif
 #ifdef WEBRTC_CODEC_SPEEX
-  {3, {160, 320, 480}, 0, 1},
-  {3, {320, 640, 960}, 0, 1},
+    {3, {160, 320, 480}, 0, 1},
+    {3, {320, 640, 960}, 0, 1},
 #endif
-  // Comfort noise for three different sampling frequencies.
-  {1, {240}, 240, 1},
-  {1, {480}, 480, 1},
-  {1, {960}, 960, 1},
-  {1, {1440}, 1440, 1},
+    // Comfort noise for three different sampling frequencies.
+    {1, {240}, 240, 1},
+    {1, {480}, 480, 1},
+    {1, {960}, 960, 1},
+    {1, {1440}, 1440, 1},
 #ifdef WEBRTC_CODEC_AVT
-  {1, {240}, 240, 1},
+    {1, {240}, 240, 1},
 #endif
 #ifdef WEBRTC_CODEC_RED
-  {1, {0}, 0, 1},
+    {1, {0}, 0, 1},
 #endif
-  // To prevent compile errors due to trailing commas.
-  {-1, {-1}, -1, -1}
+    // To prevent compile errors due to trailing commas.
+    {-1, {-1}, -1, -1}
 };
 
 // Create a database of all NetEQ decoders at compile time.
 const WebRtcNetEQDecoder ACMCodecDB::neteq_decoders_[] = {
 #if (defined(WEBRTC_CODEC_ISAC) || defined(WEBRTC_CODEC_ISACFX))
-  kDecoderISAC,
+    kDecoderISAC,
 # if (defined(WEBRTC_CODEC_ISAC))
-  kDecoderISACswb,
-  kDecoderISACfb,
+    kDecoderISACswb,
+    kDecoderISACfb,
 # endif
 #endif
 #ifdef WEBRTC_CODEC_PCM16
-  // Mono
-  kDecoderPCM16B,
-  kDecoderPCM16Bwb,
-  kDecoderPCM16Bswb32kHz,
-  // Stereo
-  kDecoderPCM16B_2ch,
-  kDecoderPCM16Bwb_2ch,
-  kDecoderPCM16Bswb32kHz_2ch,
+    // Mono
+    kDecoderPCM16B,
+    kDecoderPCM16Bwb,
+    kDecoderPCM16Bswb32kHz,
+    // Stereo
+    kDecoderPCM16B_2ch,
+    kDecoderPCM16Bwb_2ch,
+    kDecoderPCM16Bswb32kHz_2ch,
 #endif
-  // G.711, PCM mu-las and A-law.
-  // Mono
-  kDecoderPCMu,
-  kDecoderPCMa,
-  // Stereo
-  kDecoderPCMu_2ch,
-  kDecoderPCMa_2ch,
+    // G.711, PCM mu-las and A-law.
+    // Mono
+    kDecoderPCMu,
+    kDecoderPCMa,
+    // Stereo
+    kDecoderPCMu_2ch,
+    kDecoderPCMa_2ch,
 #ifdef WEBRTC_CODEC_ILBC
-  kDecoderILBC,
+    kDecoderILBC,
 #endif
 #ifdef WEBRTC_CODEC_AMR
-  kDecoderAMR,
+    kDecoderAMR,
 #endif
 #ifdef WEBRTC_CODEC_AMRWB
-  kDecoderAMRWB,
+    kDecoderAMRWB,
 #endif
 #ifdef WEBRTC_CODEC_CELT
-  // Mono
-  kDecoderCELT_32,
-  // Stereo
-  kDecoderCELT_32_2ch,
+    // Mono
+    kDecoderCELT_32,
+    // Stereo
+    kDecoderCELT_32_2ch,
 #endif
 #ifdef WEBRTC_CODEC_G722
-  // Mono
-  kDecoderG722,
-  // Stereo
-  kDecoderG722_2ch,
+    // Mono
+    kDecoderG722,
+    // Stereo
+    kDecoderG722_2ch,
 #endif
 #ifdef WEBRTC_CODEC_G722_1
-  kDecoderG722_1_32,
-  kDecoderG722_1_24,
-  kDecoderG722_1_16,
+    kDecoderG722_1_32,
+    kDecoderG722_1_24,
+    kDecoderG722_1_16,
 #endif
 #ifdef WEBRTC_CODEC_G722_1C
-  kDecoderG722_1C_48,
-  kDecoderG722_1C_32,
-  kDecoderG722_1C_24,
+    kDecoderG722_1C_48,
+    kDecoderG722_1C_32,
+    kDecoderG722_1C_24,
 #endif
 #ifdef WEBRTC_CODEC_G729
-  kDecoderG729,
+    kDecoderG729,
 #endif
 #ifdef WEBRTC_CODEC_G729_1
-  kDecoderG729_1,
+    kDecoderG729_1,
 #endif
 #ifdef WEBRTC_CODEC_GSMFR
-  kDecoderGSMFR,
+    kDecoderGSMFR,
 #endif
 #ifdef WEBRTC_CODEC_OPUS
-  // Mono and stereo.
-  kDecoderOpus,
+    // Mono and stereo.
+    kDecoderOpus,
 #endif
 #ifdef WEBRTC_CODEC_SPEEX
-  kDecoderSPEEX_8,
-  kDecoderSPEEX_16,
+    kDecoderSPEEX_8,
+    kDecoderSPEEX_16,
 #endif
-  // Comfort noise for three different sampling frequencies.
-  kDecoderCNG,
-  kDecoderCNG,
-  kDecoderCNG,
-  kDecoderCNG,
+    // Comfort noise for three different sampling frequencies.
+    kDecoderCNG,
+    kDecoderCNG,
+    kDecoderCNG,
+    kDecoderCNG,
 #ifdef WEBRTC_CODEC_AVT
-  kDecoderAVT,
+    kDecoderAVT,
 #endif
 #ifdef WEBRTC_CODEC_RED
-  kDecoderRED,
+    kDecoderRED,
 #endif
-  kDecoderReservedEnd
+    kDecoderReservedEnd
 };
 
 // Get codec information from database.
@@ -587,7 +587,7 @@
 }
 // Gets codec id number, and mirror id, from database for the receiver.
 int ACMCodecDB::ReceiverCodecNumber(const CodecInst* codec_inst,
-    int* mirror_id) {
+                                    int* mirror_id) {
   // Look for a matching codec in the database.
   int codec_id = CodecId(codec_inst);
 
@@ -618,7 +618,7 @@
 int ACMCodecDB::BasicCodingBlock(int codec_id) {
   // Error check to see that codec_id is not out of bounds.
   if (codec_id < 0 || codec_id >= kNumCodecs) {
-      return -1;
+    return -1;
   }
 
   return codec_settings_[codec_id].basic_block_samples;
diff --git a/webrtc/modules/audio_coding/main/source/acm_codec_database.h b/webrtc/modules/audio_coding/main/source/acm_codec_database.h
index 30d0462..0ea7741 100644
--- a/webrtc/modules/audio_coding/main/source/acm_codec_database.h
+++ b/webrtc/modules/audio_coding/main/source/acm_codec_database.h
@@ -16,9 +16,9 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_CODEC_DATABASE_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_CODEC_DATABASE_H_
 
-#include "acm_generic_codec.h"
-#include "common_types.h"
-#include "webrtc_neteq.h"
+#include "webrtc/common_types.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
 
 namespace webrtc {
 
diff --git a/webrtc/modules/audio_coding/main/source/acm_common_defs.h b/webrtc/modules/audio_coding/main/source/acm_common_defs.h
index 06d17f3..ac3f9b7 100644
--- a/webrtc/modules/audio_coding/main/source/acm_common_defs.h
+++ b/webrtc/modules/audio_coding/main/source/acm_common_defs.h
@@ -13,10 +13,10 @@
 
 #include <string.h>
 
-#include "audio_coding_module_typedefs.h"
-#include "common_types.h"
-#include "engine_configurations.h"
-#include "typedefs.h"
+#include "webrtc/common_types.h"
+#include "webrtc/engine_configurations.h"
+#include "webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h"
+#include "webrtc/typedefs.h"
 
 // Checks for enabled codecs, we prevent enabling codecs which are not
 // compatible.
@@ -26,10 +26,10 @@
 
 #ifdef WIN32
 // OS-dependent case-insensitive string comparison
-#define STR_CASE_CMP(x,y) ::_stricmp(x,y)
+#define STR_CASE_CMP(x, y) ::_stricmp(x, y)
 #else
 // OS-dependent case-insensitive string comparison
-#define STR_CASE_CMP(x,y) ::strcasecmp(x,y)
+#define STR_CASE_CMP(x, y) ::strcasecmp(x, y)
 #endif
 
 namespace webrtc {
@@ -78,40 +78,40 @@
 // A structure which contains codec parameters. For instance, used when
 // initializing encoder and decoder.
 //
-//   codecInstant            : c.f. common_types.h
-//   enableDTX               : set true to enable DTX. If codec does not have
-//                             internal DTX, this will enable VAD.
-//   enableVAD               : set true to enable VAD.
-//   vadMode                 : VAD mode, c.f. audio_coding_module_typedefs.h
-//                             for possible values.
+//   codec_inst: c.f. common_types.h
+//   enable_dtx: set true to enable DTX. If codec does not have
+//               internal DTX, this will enable VAD.
+//   enable_vad: set true to enable VAD.
+//   vad_mode: VAD mode, c.f. audio_coding_module_typedefs.h
+//             for possible values.
 struct WebRtcACMCodecParams {
-  CodecInst codecInstant;
-  bool enableDTX;
-  bool enableVAD;
-  ACMVADMode vadMode;
+  CodecInst codec_inst;
+  bool enable_dtx;
+  bool enable_vad;
+  ACMVADMode vad_mode;
 };
 
 // A structure that encapsulates audio buffer and related parameters
 // used for synchronization of audio of two ACMs.
 //
-//   inAudio                 : same as ACMGenericCodec::_inAudio
-//   inAudioIxRead           : same as ACMGenericCodec::_inAudioIxRead
-//   inAudioIxWrite          : same as ACMGenericCodec::_inAudioIxWrite
-//   inTimestamp             : same as ACMGenericCodec::_inTimestamp
-//   inTimestampIxWrite      : same as ACMGenericCodec::_inTImestampIxWrite
-//   lastTimestamp           : same as ACMGenericCodec::_lastTimestamp
-//   lastInTimestamp         : same as AudioCodingModuleImpl::_lastInTimestamp
+//   in_audio: same as ACMGenericCodec::in_audio_
+//   in_audio_ix_read: same as ACMGenericCodec::in_audio_ix_read_
+//   in_audio_ix_write: same as ACMGenericCodec::in_audio_ix_write_
+//   in_timestamp: same as ACMGenericCodec::in_timestamp_
+//   in_timestamp_ix_write: same as ACMGenericCodec::in_timestamp_ix_write_
+//   last_timestamp: same as ACMGenericCodec::last_timestamp_
+//   last_in_timestamp: same as AudioCodingModuleImpl::last_in_timestamp_
 //
 struct WebRtcACMAudioBuff {
-  WebRtc_Word16 inAudio[AUDIO_BUFFER_SIZE_W16];
-  WebRtc_Word16 inAudioIxRead;
-  WebRtc_Word16 inAudioIxWrite;
-  WebRtc_UWord32 inTimestamp[TIMESTAMP_BUFFER_SIZE_W32];
-  WebRtc_Word16 inTimestampIxWrite;
-  WebRtc_UWord32 lastTimestamp;
-  WebRtc_UWord32 lastInTimestamp;
+  WebRtc_Word16 in_audio[AUDIO_BUFFER_SIZE_W16];
+  WebRtc_Word16 in_audio_ix_read;
+  WebRtc_Word16 in_audio_ix_write;
+  WebRtc_UWord32 in_timestamp[TIMESTAMP_BUFFER_SIZE_W32];
+  WebRtc_Word16 in_timestamp_ix_write;
+  WebRtc_UWord32 last_timestamp;
+  WebRtc_UWord32 last_in_timestamp;
 };
 
-} // namespace webrtc
+}  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_COMMON_DEFS_H_
diff --git a/webrtc/modules/audio_coding/main/source/acm_dtmf_detection.cc b/webrtc/modules/audio_coding/main/source/acm_dtmf_detection.cc
index e256186..6271eae 100644
--- a/webrtc/modules/audio_coding/main/source/acm_dtmf_detection.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_dtmf_detection.cc
@@ -8,8 +8,9 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_dtmf_detection.h"
-#include "audio_coding_module_typedefs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_dtmf_detection.h"
+
+#include "webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h"
 
 namespace webrtc {
 
@@ -26,12 +27,12 @@
 }
 
 WebRtc_Word16 ACMDTMFDetection::Detect(
-    const WebRtc_Word16* /* inAudioBuff */,
-    const WebRtc_UWord16 /* inBuffLenWord16 */,
-    const WebRtc_Word32 /* inFreqHz */,
-    bool& /* toneDetected */,
+    const WebRtc_Word16* /* in_audio_buff */,
+    const WebRtc_UWord16 /* in_buff_len_word16 */,
+    const WebRtc_Word32 /* in_freq_hz */,
+    bool& /* tone_detected */,
     WebRtc_Word16& /* tone  */) {
   return -1;
 }
 
-} // namespace webrtc
+}  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_dtmf_detection.h b/webrtc/modules/audio_coding/main/source/acm_dtmf_detection.h
index fab6f18..4251d00 100644
--- a/webrtc/modules/audio_coding/main/source/acm_dtmf_detection.h
+++ b/webrtc/modules/audio_coding/main/source/acm_dtmf_detection.h
@@ -11,9 +11,9 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_DTMF_DETECTION_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_DTMF_DETECTION_H_
 
-#include "acm_resampler.h"
-#include "audio_coding_module_typedefs.h"
-#include "typedefs.h"
+#include "webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_resampler.h"
+#include "webrtc/typedefs.h"
 
 namespace webrtc {
 
@@ -23,14 +23,14 @@
   ~ACMDTMFDetection();
   WebRtc_Word16 Enable(ACMCountries cpt = ACMDisableCountryDetection);
   WebRtc_Word16 Disable();
-  WebRtc_Word16 Detect(const WebRtc_Word16* inAudioBuff,
-                       const WebRtc_UWord16 inBuffLenWord16,
-                       const WebRtc_Word32 inFreqHz,
-                       bool& toneDetected,
+  WebRtc_Word16 Detect(const WebRtc_Word16* in_audio_buff,
+                       const WebRtc_UWord16 in_buff_len_word16,
+                       const WebRtc_Word32 in_freq_hz,
+                       bool& tone_detected,
                        WebRtc_Word16& tone);
 
  private:
-  ACMResampler _resampler;
+  ACMResampler resampler_;
 };
 
 } // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_dtmf_playout.cc b/webrtc/modules/audio_coding/main/source/acm_dtmf_playout.cc
index de69f10..bf4f63b 100644
--- a/webrtc/modules/audio_coding/main/source/acm_dtmf_playout.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_dtmf_playout.cc
@@ -8,19 +8,20 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_dtmf_playout.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_dtmf_playout.h"
+
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 namespace webrtc {
 
 #ifndef WEBRTC_CODEC_AVT
 
 ACMDTMFPlayout::ACMDTMFPlayout(
-    WebRtc_Word16 /* codecID */) {
+    WebRtc_Word16 /* codec_id */) {
   return;
 }
 
@@ -29,31 +30,32 @@
 }
 
 WebRtc_Word16 ACMDTMFPlayout::InternalEncode(
-    WebRtc_UWord8* /* bitStream */,
-    WebRtc_Word16* /* bitStreamLenByte */) {
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
-WebRtc_Word16 ACMDTMFPlayout::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                         WebRtc_Word16 /* bitStreamLenByte */,
-                                         WebRtc_Word16* /* audio */,
-                                         WebRtc_Word16* /* audioSamples */,
-                                         WebRtc_Word8* /* speechType */) {
+WebRtc_Word16 ACMDTMFPlayout::DecodeSafe(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16 /* bitstream_len_byte */,
+    WebRtc_Word16* /* audio */,
+    WebRtc_Word16* /* audio_samples */,
+    WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
 WebRtc_Word16 ACMDTMFPlayout::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMDTMFPlayout::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-WebRtc_Word32 ACMDTMFPlayout::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef */,
-                                       const CodecInst& /* codecInst */) {
+WebRtc_Word32 ACMDTMFPlayout::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def */,
+                                       const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -69,7 +71,7 @@
   return -1;
 }
 
-void ACMDTMFPlayout::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMDTMFPlayout::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
@@ -83,8 +85,8 @@
 
 #else     //===================== Actual Implementation =======================
 
-ACMDTMFPlayout::ACMDTMFPlayout(WebRtc_Word16 codecID) {
-  _codecID = codecID;
+ACMDTMFPlayout::ACMDTMFPlayout(WebRtc_Word16 codec_id) {
+  codec_id_ = codec_id;
 }
 
 ACMDTMFPlayout::~ACMDTMFPlayout() {
@@ -92,41 +94,42 @@
 }
 
 WebRtc_Word16 ACMDTMFPlayout::InternalEncode(
-    WebRtc_UWord8* /* bitStream */,
-    WebRtc_Word16* /* bitStreamLenByte */) {
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
   return 0;
 }
 
-WebRtc_Word16 ACMDTMFPlayout::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                         WebRtc_Word16 /* bitStreamLenByte */,
-                                         WebRtc_Word16* /* audio */,
-                                         WebRtc_Word16* /* audioSamples */,
-                                         WebRtc_Word8* /* speechType */) {
+WebRtc_Word16 ACMDTMFPlayout::DecodeSafe(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16 /* bitstream_len_byte */,
+    WebRtc_Word16* /* audio */,
+    WebRtc_Word16* /* audio_samples */,
+    WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
 WebRtc_Word16 ACMDTMFPlayout::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   // This codec does not need initialization,
   // DTMFPlayout has no instance
   return 0;
 }
 
 WebRtc_Word16 ACMDTMFPlayout::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   // This codec does not need initialization,
   // DTMFPlayout has no instance
   return 0;
 }
 
-WebRtc_Word32 ACMDTMFPlayout::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                       const CodecInst& codecInst) {
+WebRtc_Word32 ACMDTMFPlayout::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                       const CodecInst& codec_inst) {
   // Fill up the structure by calling
   // "SET_CODEC_PAR" & "SET_AVT_FUNCTION."
   // Then call NetEQ to add the codec to it's
   // database.
-  SET_CODEC_PAR((codecDef), kDecoderAVT, codecInst.pltype, NULL, 8000);
-  SET_AVT_FUNCTIONS((codecDef));
+  SET_CODEC_PAR((codec_def), kDecoderAVT, codec_inst.pltype, NULL, 8000);
+  SET_AVT_FUNCTIONS((codec_def));
   return 0;
 }
 
@@ -144,7 +147,7 @@
   return 0;
 }
 
-void ACMDTMFPlayout::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMDTMFPlayout::InternalDestructEncoderInst(void* /* ptr_inst */) {
   // DTMFPlayout has no instance
   return;
 }
@@ -161,4 +164,4 @@
 
 #endif
 
-} // namespace webrtc
+}  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_dtmf_playout.h b/webrtc/modules/audio_coding/main/source/acm_dtmf_playout.h
index 62b1501..2607a2f 100644
--- a/webrtc/modules/audio_coding/main/source/acm_dtmf_playout.h
+++ b/webrtc/modules/audio_coding/main/source/acm_dtmf_playout.h
@@ -11,32 +11,33 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_DTMF_PLAYOUT_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_DTMF_PLAYOUT_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 namespace webrtc {
 
 class ACMDTMFPlayout: public ACMGenericCodec {
  public:
-  ACMDTMFPlayout(WebRtc_Word16 codecID);
+  explicit ACMDTMFPlayout(WebRtc_Word16 codec_id);
   ~ACMDTMFPlayout();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
-                           WebRtc_Word16* audio, WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
+                           WebRtc_Word16* audio, WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -46,9 +47,9 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 };
 
-} // namespace webrtc
+}  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_DTMF_PLAYOUT_H_
diff --git a/webrtc/modules/audio_coding/main/source/acm_g722.cc b/webrtc/modules/audio_coding/main/source/acm_g722.cc
index 12397be..cc93801 100644
--- a/webrtc/modules/audio_coding/main/source/acm_g722.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_g722.cc
@@ -8,64 +8,63 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_g722.h"
-#include "acm_codec_database.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
-#include "g722_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_g722.h"
+
+#include "webrtc/modules/audio_coding/codecs/g722/include/g722_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 namespace webrtc {
 
 #ifndef WEBRTC_CODEC_G722
 
-ACMG722::ACMG722(WebRtc_Word16 /* codecID */)
-    : _ptrEncStr(NULL),
-      _ptrDecStr(NULL),
-      _encoderInstPtr(NULL),
-      _encoderInstPtrRight(NULL),
-      _decoderInstPtr(NULL) {
-  return;
-}
+ACMG722::ACMG722(WebRtc_Word16 /* codec_id */)
+    : ptr_enc_str_(NULL),
+      ptr_dec_str_(NULL),
+      encoder_inst_ptr_(NULL),
+      encoder_inst_ptr_right_(NULL),
+      decoder_inst_ptr_(NULL) {}
 
-ACMG722::~ACMG722() {
-  return;
-}
+ACMG722::~ACMG722() {}
 
-WebRtc_Word32 ACMG722::Add10MsDataSafe(const WebRtc_UWord32 /* timestamp */,
-                                       const WebRtc_Word16* /* data */,
-                                       const WebRtc_UWord16 /* lengthSmpl */,
-                                       const WebRtc_UWord8 /* audioChannel */) {
+WebRtc_Word32 ACMG722::Add10MsDataSafe(
+    const WebRtc_UWord32 /* timestamp */,
+    const WebRtc_Word16* /* data */,
+    const WebRtc_UWord16 /* length_smpl */,
+    const WebRtc_UWord8 /* audio_channel */) {
   return -1;
 }
 
-WebRtc_Word16 ACMG722::InternalEncode(WebRtc_UWord8* /* bitStream */,
-                                      WebRtc_Word16* /* bitStreamLenByte */) {
+WebRtc_Word16 ACMG722::InternalEncode(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
-WebRtc_Word16 ACMG722::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                  WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMG722::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                  WebRtc_Word16 /* bitstream_len_byte */,
                                   WebRtc_Word16* /* audio */,
-                                  WebRtc_Word16* /* audioSamples */,
-                                  WebRtc_Word8* /* speechType */) {
+                                  WebRtc_Word16* /* audio_samples */,
+                                  WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
 WebRtc_Word16 ACMG722::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMG722::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-WebRtc_Word32 ACMG722::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef */,
-                                const CodecInst& /* codecInst */) {
+WebRtc_Word32 ACMG722::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def */,
+                                const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -89,7 +88,7 @@
   return;
 }
 
-void ACMG722::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMG722::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
@@ -100,158 +99,160 @@
 
 // Encoder and decoder memory
 struct ACMG722EncStr {
-  G722EncInst* inst; // instance for left channel in case of stereo
-  G722EncInst* instRight; // instance for right channel in case of stereo
+  G722EncInst* inst;  // instance for left channel in case of stereo
+  G722EncInst* inst_right;  // instance for right channel in case of stereo
 };
 struct ACMG722DecStr {
-  G722DecInst* inst; // instance for left channel in case of stereo
-  G722DecInst* instRight; // instance for right channel in case of stereo
+  G722DecInst* inst;  // instance for left channel in case of stereo
+  G722DecInst* inst_right;  // instance for right channel in case of stereo
 };
 
-ACMG722::ACMG722(WebRtc_Word16 codecID)
-    : _encoderInstPtr(NULL),
-      _encoderInstPtrRight(NULL),
-      _decoderInstPtr(NULL) {
+ACMG722::ACMG722(WebRtc_Word16 codec_id)
+    : encoder_inst_ptr_(NULL),
+      encoder_inst_ptr_right_(NULL),
+      decoder_inst_ptr_(NULL) {
   // Encoder
-  _ptrEncStr = new ACMG722EncStr;
-  if (_ptrEncStr != NULL) {
-    _ptrEncStr->inst = NULL;
-    _ptrEncStr->instRight = NULL;
+  ptr_enc_str_ = new ACMG722EncStr;
+  if (ptr_enc_str_ != NULL) {
+    ptr_enc_str_->inst = NULL;
+    ptr_enc_str_->inst_right = NULL;
   }
   // Decoder
-  _ptrDecStr = new ACMG722DecStr;
-  if (_ptrDecStr != NULL) {
-    _ptrDecStr->inst = NULL;
-    _ptrDecStr->instRight = NULL; // Not used
+  ptr_dec_str_ = new ACMG722DecStr;
+  if (ptr_dec_str_ != NULL) {
+    ptr_dec_str_->inst = NULL;
+    ptr_dec_str_->inst_right = NULL;  // Not used
   }
-  _codecID = codecID;
+  codec_id_ = codec_id;
   return;
 }
 
 ACMG722::~ACMG722() {
   // Encoder
-  if (_ptrEncStr != NULL) {
-    if (_ptrEncStr->inst != NULL) {
-      WebRtcG722_FreeEncoder(_ptrEncStr->inst);
-      _ptrEncStr->inst = NULL;
+  if (ptr_enc_str_ != NULL) {
+    if (ptr_enc_str_->inst != NULL) {
+      WebRtcG722_FreeEncoder(ptr_enc_str_->inst);
+      ptr_enc_str_->inst = NULL;
     }
-    if (_ptrEncStr->instRight != NULL) {
-      WebRtcG722_FreeEncoder(_ptrEncStr->instRight);
-      _ptrEncStr->instRight = NULL;
+    if (ptr_enc_str_->inst_right != NULL) {
+      WebRtcG722_FreeEncoder(ptr_enc_str_->inst_right);
+      ptr_enc_str_->inst_right = NULL;
     }
-    delete _ptrEncStr;
-    _ptrEncStr = NULL;
+    delete ptr_enc_str_;
+    ptr_enc_str_ = NULL;
   }
   // Decoder
-  if (_ptrDecStr != NULL) {
-    if (_ptrDecStr->inst != NULL) {
-      WebRtcG722_FreeDecoder(_ptrDecStr->inst);
-      _ptrDecStr->inst = NULL;
+  if (ptr_dec_str_ != NULL) {
+    if (ptr_dec_str_->inst != NULL) {
+      WebRtcG722_FreeDecoder(ptr_dec_str_->inst);
+      ptr_dec_str_->inst = NULL;
     }
-    if (_ptrDecStr->instRight != NULL) {
-      WebRtcG722_FreeDecoder(_ptrDecStr->instRight);
-      _ptrDecStr->instRight = NULL;
+    if (ptr_dec_str_->inst_right != NULL) {
+      WebRtcG722_FreeDecoder(ptr_dec_str_->inst_right);
+      ptr_dec_str_->inst_right = NULL;
     }
-    delete _ptrDecStr;
-    _ptrDecStr = NULL;
+    delete ptr_dec_str_;
+    ptr_dec_str_ = NULL;
   }
   return;
 }
 
 WebRtc_Word32 ACMG722::Add10MsDataSafe(const WebRtc_UWord32 timestamp,
                                        const WebRtc_Word16* data,
-                                       const WebRtc_UWord16 lengthSmpl,
-                                       const WebRtc_UWord8 audioChannel) {
-  return ACMGenericCodec::Add10MsDataSafe((timestamp >> 1), data, lengthSmpl,
-                                          audioChannel);
+                                       const WebRtc_UWord16 length_smpl,
+                                       const WebRtc_UWord8 audio_channel) {
+  return ACMGenericCodec::Add10MsDataSafe((timestamp >> 1), data, length_smpl,
+                                          audio_channel);
 }
 
-WebRtc_Word16 ACMG722::InternalEncode(WebRtc_UWord8* bitStream,
-                                      WebRtc_Word16* bitStreamLenByte) {
+WebRtc_Word16 ACMG722::InternalEncode(WebRtc_UWord8* bitstream,
+                                      WebRtc_Word16* bitstream_len_byte) {
   // If stereo, split input signal in left and right channel before encoding
-  if (_noChannels == 2) {
-    WebRtc_Word16 leftChannel[960];
-    WebRtc_Word16 rightChannel[960];
-    WebRtc_UWord8 outLeft[480];
-    WebRtc_UWord8 outRight[480];
-    WebRtc_Word16 lenInBytes;
-    for (int i = 0, j = 0; i < _frameLenSmpl * 2; i += 2, j++) {
-      leftChannel[j] = _inAudio[_inAudioIxRead + i];
-      rightChannel[j] = _inAudio[_inAudioIxRead + i + 1];
+  if (num_channels_ == 2) {
+    WebRtc_Word16 left_channel[960];
+    WebRtc_Word16 right_channel[960];
+    WebRtc_UWord8 out_left[480];
+    WebRtc_UWord8 out_right[480];
+    WebRtc_Word16 len_in_bytes;
+    for (int i = 0, j = 0; i < frame_len_smpl_ * 2; i += 2, j++) {
+      left_channel[j] = in_audio_[in_audio_ix_read_ + i];
+      right_channel[j] = in_audio_[in_audio_ix_read_ + i + 1];
     }
-    lenInBytes = WebRtcG722_Encode(_encoderInstPtr, leftChannel, _frameLenSmpl,
-                                   (WebRtc_Word16*) outLeft);
-    lenInBytes += WebRtcG722_Encode(_encoderInstPtrRight, rightChannel,
-                                    _frameLenSmpl, (WebRtc_Word16*) outRight);
-    *bitStreamLenByte = lenInBytes;
+    len_in_bytes = WebRtcG722_Encode(encoder_inst_ptr_, left_channel,
+                                     frame_len_smpl_,
+                                     (WebRtc_Word16*)out_left);
+    len_in_bytes += WebRtcG722_Encode(encoder_inst_ptr_right_, right_channel,
+                                      frame_len_smpl_,
+                                      (WebRtc_Word16*)out_right);
+    *bitstream_len_byte = len_in_bytes;
 
     // Interleave the 4 bits per sample from left and right channel
-    for (int i = 0, j = 0; i < lenInBytes; i += 2, j++) {
-      bitStream[i] = (outLeft[j] & 0xF0) + (outRight[j] >> 4);
-      bitStream[i + 1] = ((outLeft[j] & 0x0F) << 4) + (outRight[j] & 0x0F);
+    for (int i = 0, j = 0; i < len_in_bytes; i += 2, j++) {
+      bitstream[i] = (out_left[j] & 0xF0) + (out_right[j] >> 4);
+      bitstream[i + 1] = ((out_left[j] & 0x0F) << 4) + (out_right[j] & 0x0F);
     }
   } else {
-    *bitStreamLenByte = WebRtcG722_Encode(_encoderInstPtr,
-                                          &_inAudio[_inAudioIxRead],
-                                          _frameLenSmpl,
-                                          (WebRtc_Word16*) bitStream);
+    *bitstream_len_byte = WebRtcG722_Encode(encoder_inst_ptr_,
+                                            &in_audio_[in_audio_ix_read_],
+                                            frame_len_smpl_,
+                                            (WebRtc_Word16*)bitstream);
   }
 
   // increment the read index this tell the caller how far
   // we have gone forward in reading the audio buffer
-  _inAudioIxRead += _frameLenSmpl * _noChannels;
-  return *bitStreamLenByte;
+  in_audio_ix_read_ += frame_len_smpl_ * num_channels_;
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMG722::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                  WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMG722::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                  WebRtc_Word16 /* bitstream_len_byte */,
                                   WebRtc_Word16* /* audio */,
-                                  WebRtc_Word16* /* audioSamples */,
-                                  WebRtc_Word8* /* speechType */) {
+                                  WebRtc_Word16* /* audio_samples */,
+                                  WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
-WebRtc_Word16 ACMG722::InternalInitEncoder(WebRtcACMCodecParams* codecParams) {
-  if (codecParams->codecInstant.channels == 2) {
+WebRtc_Word16 ACMG722::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
+  if (codec_params->codec_inst.channels == 2) {
     // Create codec struct for right channel
-    if (_ptrEncStr->instRight == NULL) {
-      WebRtcG722_CreateEncoder(&_ptrEncStr->instRight);
-      if (_ptrEncStr->instRight == NULL) {
+    if (ptr_enc_str_->inst_right == NULL) {
+      WebRtcG722_CreateEncoder(&ptr_enc_str_->inst_right);
+      if (ptr_enc_str_->inst_right == NULL) {
         return -1;
       }
     }
-    _encoderInstPtrRight = _ptrEncStr->instRight;
-    if (WebRtcG722_EncoderInit(_encoderInstPtrRight) < 0) {
+    encoder_inst_ptr_right_ = ptr_enc_str_->inst_right;
+    if (WebRtcG722_EncoderInit(encoder_inst_ptr_right_) < 0) {
       return -1;
     }
   }
 
-  return WebRtcG722_EncoderInit(_encoderInstPtr);
+  return WebRtcG722_EncoderInit(encoder_inst_ptr_);
 }
 
 WebRtc_Word16 ACMG722::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
-  return WebRtcG722_DecoderInit(_decoderInstPtr);
+    WebRtcACMCodecParams* /* codec_params */) {
+  return WebRtcG722_DecoderInit(decoder_inst_ptr_);
 }
 
-WebRtc_Word32 ACMG722::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
-    // TODO: log error
+WebRtc_Word32 ACMG722::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
+    // TODO(turajs): log error
     return -1;
   }
   // Fill up the structure by calling
   // "SET_CODEC_PAR" & "SET_G722_FUNCTION."
   // Then call NetEQ to add the codec to it's
   // database.
-  if (codecInst.channels == 1) {
-    SET_CODEC_PAR(codecDef, kDecoderG722, codecInst.pltype, _decoderInstPtr,
+  if (codec_inst.channels == 1) {
+    SET_CODEC_PAR(codec_def, kDecoderG722, codec_inst.pltype, decoder_inst_ptr_,
                   16000);
   } else {
-    SET_CODEC_PAR(codecDef, kDecoderG722_2ch, codecInst.pltype,
-                  _decoderInstPtr, 16000);
+    SET_CODEC_PAR(codec_def, kDecoderG722_2ch, codec_inst.pltype,
+                  decoder_inst_ptr_, 16000);
   }
-  SET_G722_FUNCTIONS(codecDef);
+  SET_G722_FUNCTIONS(codec_def);
   return 0;
 }
 
@@ -260,61 +261,61 @@
 }
 
 WebRtc_Word16 ACMG722::InternalCreateEncoder() {
-  if (_ptrEncStr == NULL) {
+  if (ptr_enc_str_ == NULL) {
     // this structure must be created at the costructor
     // if it is still NULL then there is a probelm and
     // we dont continue
     return -1;
   }
-  WebRtcG722_CreateEncoder(&_ptrEncStr->inst);
-  if (_ptrEncStr->inst == NULL) {
+  WebRtcG722_CreateEncoder(&ptr_enc_str_->inst);
+  if (ptr_enc_str_->inst == NULL) {
     return -1;
   }
-  _encoderInstPtr = _ptrEncStr->inst;
+  encoder_inst_ptr_ = ptr_enc_str_->inst;
   return 0;
 }
 
 void ACMG722::DestructEncoderSafe() {
-  if (_ptrEncStr != NULL) {
-    if (_ptrEncStr->inst != NULL) {
-      WebRtcG722_FreeEncoder(_ptrEncStr->inst);
-      _ptrEncStr->inst = NULL;
+  if (ptr_enc_str_ != NULL) {
+    if (ptr_enc_str_->inst != NULL) {
+      WebRtcG722_FreeEncoder(ptr_enc_str_->inst);
+      ptr_enc_str_->inst = NULL;
     }
   }
-  _encoderExist = false;
-  _encoderInitialized = false;
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
 }
 
 WebRtc_Word16 ACMG722::InternalCreateDecoder() {
-  if (_ptrDecStr == NULL) {
+  if (ptr_dec_str_ == NULL) {
     // this structure must be created at the costructor
     // if it is still NULL then there is a probelm and
     // we dont continue
     return -1;
   }
 
-  WebRtcG722_CreateDecoder(&_ptrDecStr->inst);
-  if (_ptrDecStr->inst == NULL) {
+  WebRtcG722_CreateDecoder(&ptr_dec_str_->inst);
+  if (ptr_dec_str_->inst == NULL) {
     return -1;
   }
-  _decoderInstPtr = _ptrDecStr->inst;
+  decoder_inst_ptr_ = ptr_dec_str_->inst;
   return 0;
 }
 
 void ACMG722::DestructDecoderSafe() {
-  _decoderExist = false;
-  _decoderInitialized = false;
-  if (_ptrDecStr != NULL) {
-    if (_ptrDecStr->inst != NULL) {
-      WebRtcG722_FreeDecoder(_ptrDecStr->inst);
-      _ptrDecStr->inst = NULL;
+  decoder_exist_ = false;
+  decoder_initialized_ = false;
+  if (ptr_dec_str_ != NULL) {
+    if (ptr_dec_str_->inst != NULL) {
+      WebRtcG722_FreeDecoder(ptr_dec_str_->inst);
+      ptr_dec_str_->inst = NULL;
     }
   }
 }
 
-void ACMG722::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    WebRtcG722_FreeEncoder(static_cast<G722EncInst*>(ptrInst));
+void ACMG722::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    WebRtcG722_FreeEncoder(static_cast<G722EncInst*>(ptr_inst));
   }
   return;
 }
@@ -350,4 +351,4 @@
 
 #endif
 
-} // namespace webrtc
+}  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_g722.h b/webrtc/modules/audio_coding/main/source/acm_g722.h
index d718cdb..60ea2b4 100644
--- a/webrtc/modules/audio_coding/main/source/acm_g722.h
+++ b/webrtc/modules/audio_coding/main/source/acm_g722.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G722_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G722_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 typedef struct WebRtcG722EncInst G722EncInst;
 typedef struct WebRtcG722DecInst G722DecInst;
@@ -24,31 +24,32 @@
 
 class ACMG722: public ACMGenericCodec {
  public:
-  ACMG722(WebRtc_Word16 codecID);
+  explicit ACMG722(WebRtc_Word16 codec_id);
   ~ACMG722();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
-                           WebRtc_Word16* audio, WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
+                           WebRtc_Word16* audio, WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   WebRtc_Word32 Add10MsDataSafe(const WebRtc_UWord32 timestamp,
                                 const WebRtc_Word16* data,
-                                const WebRtc_UWord16 lengthSmpl,
-                                const WebRtc_UWord8 audioChannel);
+                                const WebRtc_UWord16 length_smpl,
+                                const WebRtc_UWord8 audio_channel);
 
   void DestructEncoderSafe();
 
@@ -58,18 +59,18 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   void SplitStereoPacket(uint8_t* payload, int32_t* payload_length);
 
-  ACMG722EncStr* _ptrEncStr;
-  ACMG722DecStr* _ptrDecStr;
+  ACMG722EncStr* ptr_enc_str_;
+  ACMG722DecStr* ptr_dec_str_;
 
-  G722EncInst* _encoderInstPtr;
-  G722EncInst* _encoderInstPtrRight; // Prepared for stereo
-  G722DecInst* _decoderInstPtr;
+  G722EncInst* encoder_inst_ptr_;
+  G722EncInst* encoder_inst_ptr_right_; // Prepared for stereo
+  G722DecInst* decoder_inst_ptr_;
 };
 
-} // namespace webrtc
+}  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G722_H_
diff --git a/webrtc/modules/audio_coding/main/source/acm_g7221.cc b/webrtc/modules/audio_coding/main/source/acm_g7221.cc
index b7a8f58..48c058c 100644
--- a/webrtc/modules/audio_coding/main/source/acm_g7221.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_g7221.cc
@@ -8,13 +8,14 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_g7221.h"
-#include "acm_codec_database.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_g7221.h"
+
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 #ifdef WEBRTC_CODEC_G722_1
 // NOTE! G.722.1 is not included in the open-source package. The following
@@ -24,62 +25,62 @@
 //
 // The API in the header file should match the one below.
 //
-// int16_t WebRtcG7221_CreateEnc16(G722_1_16_encinst_t_** encInst);
-// int16_t WebRtcG7221_CreateEnc24(G722_1_24_encinst_t_** encInst);
-// int16_t WebRtcG7221_CreateEnc32(G722_1_32_encinst_t_** encInst);
-// int16_t WebRtcG7221_CreateDec16(G722_1_16_decinst_t_** decInst);
-// int16_t WebRtcG7221_CreateDec24(G722_1_24_decinst_t_** decInst);
-// int16_t WebRtcG7221_CreateDec32(G722_1_32_decinst_t_** decInst);
+// int16_t WebRtcG7221_CreateEnc16(G722_1_16_encinst_t_** enc_inst);
+// int16_t WebRtcG7221_CreateEnc24(G722_1_24_encinst_t_** enc_inst);
+// int16_t WebRtcG7221_CreateEnc32(G722_1_32_encinst_t_** enc_inst);
+// int16_t WebRtcG7221_CreateDec16(G722_1_16_decinst_t_** dec_inst);
+// int16_t WebRtcG7221_CreateDec24(G722_1_24_decinst_t_** dec_inst);
+// int16_t WebRtcG7221_CreateDec32(G722_1_32_decinst_t_** dec_inst);
 //
-// int16_t WebRtcG7221_FreeEnc16(G722_1_16_encinst_t_** encInst);
-// int16_t WebRtcG7221_FreeEnc24(G722_1_24_encinst_t_** encInst);
-// int16_t WebRtcG7221_FreeEnc32(G722_1_32_encinst_t_** encInst);
-// int16_t WebRtcG7221_FreeDec16(G722_1_16_decinst_t_** decInst);
-// int16_t WebRtcG7221_FreeDec24(G722_1_24_decinst_t_** decInst);
-// int16_t WebRtcG7221_FreeDec32(G722_1_32_decinst_t_** decInst);
+// int16_t WebRtcG7221_FreeEnc16(G722_1_16_encinst_t_** enc_inst);
+// int16_t WebRtcG7221_FreeEnc24(G722_1_24_encinst_t_** enc_inst);
+// int16_t WebRtcG7221_FreeEnc32(G722_1_32_encinst_t_** enc_inst);
+// int16_t WebRtcG7221_FreeDec16(G722_1_16_decinst_t_** dec_inst);
+// int16_t WebRtcG7221_FreeDec24(G722_1_24_decinst_t_** dec_inst);
+// int16_t WebRtcG7221_FreeDec32(G722_1_32_decinst_t_** dec_inst);
 //
-// int16_t WebRtcG7221_EncoderInit16(G722_1_16_encinst_t_* encInst);
-// int16_t WebRtcG7221_EncoderInit24(G722_1_24_encinst_t_* encInst);
-// int16_t WebRtcG7221_EncoderInit32(G722_1_32_encinst_t_* encInst);
-// int16_t WebRtcG7221_DecoderInit16(G722_1_16_decinst_t_* decInst);
-// int16_t WebRtcG7221_DecoderInit24(G722_1_24_decinst_t_* decInst);
-// int16_t WebRtcG7221_DecoderInit32(G722_1_32_decinst_t_* decInst);
+// int16_t WebRtcG7221_EncoderInit16(G722_1_16_encinst_t_* enc_inst);
+// int16_t WebRtcG7221_EncoderInit24(G722_1_24_encinst_t_* enc_inst);
+// int16_t WebRtcG7221_EncoderInit32(G722_1_32_encinst_t_* enc_inst);
+// int16_t WebRtcG7221_DecoderInit16(G722_1_16_decinst_t_* dec_inst);
+// int16_t WebRtcG7221_DecoderInit24(G722_1_24_decinst_t_* dec_inst);
+// int16_t WebRtcG7221_DecoderInit32(G722_1_32_decinst_t_* dec_inst);
 //
-// int16_t WebRtcG7221_Encode16(G722_1_16_encinst_t_* encInst,
+// int16_t WebRtcG7221_Encode16(G722_1_16_encinst_t_* enc_inst,
 //                              int16_t* input,
 //                              int16_t len,
 //                              int16_t* output);
-// int16_t WebRtcG7221_Encode24(G722_1_24_encinst_t_* encInst,
+// int16_t WebRtcG7221_Encode24(G722_1_24_encinst_t_* enc_inst,
 //                              int16_t* input,
 //                              int16_t len,
 //                              int16_t* output);
-// int16_t WebRtcG7221_Encode32(G722_1_32_encinst_t_* encInst,
+// int16_t WebRtcG7221_Encode32(G722_1_32_encinst_t_* enc_inst,
 //                              int16_t* input,
 //                              int16_t len,
 //                              int16_t* output);
 //
-// int16_t WebRtcG7221_Decode16(G722_1_16_decinst_t_* decInst,
+// int16_t WebRtcG7221_Decode16(G722_1_16_decinst_t_* dec_inst,
 //                              int16_t* bitstream,
 //                              int16_t len,
 //                              int16_t* output);
-// int16_t WebRtcG7221_Decode24(G722_1_24_decinst_t_* decInst,
+// int16_t WebRtcG7221_Decode24(G722_1_24_decinst_t_* dec_inst,
 //                              int16_t* bitstream,
 //                              int16_t len,
 //                              int16_t* output);
-// int16_t WebRtcG7221_Decode32(G722_1_32_decinst_t_* decInst,
+// int16_t WebRtcG7221_Decode32(G722_1_32_decinst_t_* dec_inst,
 //                              int16_t* bitstream,
 //                              int16_t len,
 //                              int16_t* output);
 //
-// int16_t WebRtcG7221_DecodePlc16(G722_1_16_decinst_t_* decInst,
+// int16_t WebRtcG7221_DecodePlc16(G722_1_16_decinst_t_* dec_inst,
 //                                 int16_t* output,
-//                                 int16_t nrLostFrames);
-// int16_t WebRtcG7221_DecodePlc24(G722_1_24_decinst_t_* decInst,
+//                                 int16_t nr_lost_frames);
+// int16_t WebRtcG7221_DecodePlc24(G722_1_24_decinst_t_* dec_inst,
 //                                 int16_t* output,
-//                                 int16_t nrLostFrames);
-// int16_t WebRtcG7221_DecodePlc32(G722_1_32_decinst_t_* decInst,
+//                                 int16_t nr_lost_frames);
+// int16_t WebRtcG7221_DecodePlc32(G722_1_32_decinst_t_* dec_inst,
 //                                 int16_t* output,
-//                                 int16_t nrLostFrames);
+//                                 int16_t nr_lost_frames);
 #include "g7221_interface.h"
 #endif
 
@@ -87,20 +88,20 @@
 
 #ifndef WEBRTC_CODEC_G722_1
 
-ACMG722_1::ACMG722_1(WebRtc_Word16 /* codecID */)
-    : _operationalRate(-1),
-      _encoderInstPtr(NULL),
-      _encoderInstPtrRight(NULL),
-      _decoderInstPtr(NULL),
-      _encoderInst16Ptr(NULL),
-      _encoderInst16PtrR(NULL),
-      _encoderInst24Ptr(NULL),
-      _encoderInst24PtrR(NULL),
-      _encoderInst32Ptr(NULL),
-      _encoderInst32PtrR(NULL),
-      _decoderInst16Ptr(NULL),
-      _decoderInst24Ptr(NULL),
-      _decoderInst32Ptr(NULL) {
+ACMG722_1::ACMG722_1(WebRtc_Word16 /* codec_id */)
+    : operational_rate_(-1),
+      encoder_inst_ptr_(NULL),
+      encoder_inst_ptr_right_(NULL),
+      decoder_inst_ptr_(NULL),
+      encoder_inst16_ptr_(NULL),
+      encoder_inst16_ptr_right_(NULL),
+      encoder_inst24_ptr_(NULL),
+      encoder_inst24_ptr_right_(NULL),
+      encoder_inst32_ptr_(NULL),
+      encoder_inst32_ptr_right_(NULL),
+      decoder_inst16_ptr_(NULL),
+      decoder_inst24_ptr_(NULL),
+      decoder_inst32_ptr_(NULL) {
   return;
 }
 
@@ -108,31 +109,32 @@
   return;
 }
 
-WebRtc_Word16 ACMG722_1::InternalEncode(WebRtc_UWord8* /* bitStream */,
-                                        WebRtc_Word16* /* bitStreamLenByte */) {
+WebRtc_Word16 ACMG722_1::InternalEncode(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
-WebRtc_Word16 ACMG722_1::DecodeSafe(WebRtc_UWord8* /* bitStream  */,
-                                    WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMG722_1::DecodeSafe(WebRtc_UWord8* /* bitstream  */,
+                                    WebRtc_Word16 /* bitstream_len_byte */,
                                     WebRtc_Word16* /* audio */,
-                                    WebRtc_Word16* /* audioSamples */,
-                                    WebRtc_Word8* /* speechType */) {
+                                    WebRtc_Word16* /* audio_samples */,
+                                    WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
 WebRtc_Word16 ACMG722_1::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMG722_1::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-WebRtc_Word32 ACMG722_1::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef  */,
-                                  const CodecInst& /* codecInst */) {
+WebRtc_Word32 ACMG722_1::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def  */,
+                                  const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -156,69 +158,68 @@
   return;
 }
 
-void ACMG722_1::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMG722_1::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
 #else     //===================== Actual Implementation =======================
-ACMG722_1::ACMG722_1(
-    WebRtc_Word16 codecID):
-    _encoderInstPtr(NULL),
-    _encoderInstPtrRight(NULL),
-    _decoderInstPtr(NULL),
-    _encoderInst16Ptr(NULL),
-    _encoderInst16PtrR(NULL),
-    _encoderInst24Ptr(NULL),
-    _encoderInst24PtrR(NULL),
-    _encoderInst32Ptr(NULL),
-    _encoderInst32PtrR(NULL),
-    _decoderInst16Ptr(NULL),
-    _decoderInst24Ptr(NULL),
-    _decoderInst32Ptr(NULL) {
-  _codecID = codecID;
-  if (_codecID == ACMCodecDB::kG722_1_16) {
-    _operationalRate = 16000;
-  } else if (_codecID == ACMCodecDB::kG722_1_24) {
-    _operationalRate = 24000;
-  } else if (_codecID == ACMCodecDB::kG722_1_32) {
-    _operationalRate = 32000;
+ACMG722_1::ACMG722_1(WebRtc_Word16 codec_id)
+    : encoder_inst_ptr_(NULL),
+      encoder_inst_ptr_right_(NULL),
+      decoder_inst_ptr_(NULL),
+      encoder_inst16_ptr_(NULL),
+      encoder_inst16_ptr_right_(NULL),
+      encoder_inst24_ptr_(NULL),
+      encoder_inst24_ptr_right_(NULL),
+      encoder_inst32_ptr_(NULL),
+      encoder_inst32_ptr_right_(NULL),
+      decoder_inst16_ptr_(NULL),
+      decoder_inst24_ptr_(NULL),
+      decoder_inst32_ptr_(NULL) {
+  codec_id_ = codec_id;
+  if (codec_id_ == ACMCodecDB::kG722_1_16) {
+    operational_rate_ = 16000;
+  } else if (codec_id_ == ACMCodecDB::kG722_1_24) {
+    operational_rate_ = 24000;
+  } else if (codec_id_ == ACMCodecDB::kG722_1_32) {
+    operational_rate_ = 32000;
   } else {
-    _operationalRate = -1;
+    operational_rate_ = -1;
   }
   return;
 }
 
 ACMG722_1::~ACMG722_1() {
-  if (_encoderInstPtr != NULL) {
-    delete _encoderInstPtr;
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    delete encoder_inst_ptr_;
+    encoder_inst_ptr_ = NULL;
   }
-  if (_encoderInstPtrRight != NULL) {
-    delete _encoderInstPtrRight;
-    _encoderInstPtrRight = NULL;
+  if (encoder_inst_ptr_right_ != NULL) {
+    delete encoder_inst_ptr_right_;
+    encoder_inst_ptr_right_ = NULL;
   }
-  if (_decoderInstPtr != NULL) {
-    delete _decoderInstPtr;
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    delete decoder_inst_ptr_;
+    decoder_inst_ptr_ = NULL;
   }
 
-  switch (_operationalRate) {
+  switch (operational_rate_) {
     case 16000: {
-      _encoderInst16Ptr = NULL;
-      _encoderInst16PtrR = NULL;
-      _decoderInst16Ptr = NULL;
+      encoder_inst16_ptr_ = NULL;
+      encoder_inst16_ptr_right_ = NULL;
+      decoder_inst16_ptr_ = NULL;
       break;
     }
     case 24000: {
-      _encoderInst24Ptr = NULL;
-      _encoderInst24PtrR = NULL;
-      _decoderInst24Ptr = NULL;
+      encoder_inst24_ptr_ = NULL;
+      encoder_inst24_ptr_right_ = NULL;
+      decoder_inst24_ptr_ = NULL;
       break;
     }
     case 32000: {
-      _encoderInst32Ptr = NULL;
-      _encoderInst32PtrR = NULL;
-      _decoderInst32Ptr = NULL;
+      encoder_inst32_ptr_ = NULL;
+      encoder_inst32_ptr_right_ = NULL;
+      decoder_inst32_ptr_ = NULL;
       break;
     }
     default: {
@@ -228,131 +229,134 @@
   return;
 }
 
-WebRtc_Word16 ACMG722_1::InternalEncode(WebRtc_UWord8* bitStream,
-                                        WebRtc_Word16* bitStreamLenByte) {
-  WebRtc_Word16 leftChannel[320];
-  WebRtc_Word16 rightChannel[320];
-  WebRtc_Word16 lenInBytes;
-  WebRtc_Word16 outB[160];
+WebRtc_Word16 ACMG722_1::InternalEncode(WebRtc_UWord8* bitstream,
+                                        WebRtc_Word16* bitstream_len_byte) {
+  WebRtc_Word16 left_channel[320];
+  WebRtc_Word16 right_channel[320];
+  WebRtc_Word16 len_in_bytes;
+  WebRtc_Word16 out_bits[160];
 
   // If stereo, split input signal in left and right channel before encoding
-  if (_noChannels == 2) {
-    for (int i = 0, j = 0; i < _frameLenSmpl * 2; i += 2, j++) {
-      leftChannel[j] = _inAudio[_inAudioIxRead + i];
-      rightChannel[j] = _inAudio[_inAudioIxRead + i + 1];
+  if (num_channels_ == 2) {
+    for (int i = 0, j = 0; i < frame_len_smpl_ * 2; i += 2, j++) {
+      left_channel[j] = in_audio_[in_audio_ix_read_ + i];
+      right_channel[j] = in_audio_[in_audio_ix_read_ + i + 1];
     }
   } else {
-    memcpy(leftChannel, &_inAudio[_inAudioIxRead], 320);
+    memcpy(left_channel, &in_audio_[in_audio_ix_read_], 320);
   }
 
-  switch (_operationalRate) {
+  switch (operational_rate_) {
     case 16000: {
-      Inst lenInBytes = WebRtcG7221_Encode16(_encoderInst16Ptr, leftChannel,
-                                             320, &outB[0]);
-      if (_noChannels == 2) {
-        lenInBytes += WebRtcG7221_Encode16(_encoderInst16PtrR, rightChannel,
-                                           320, &outB[lenInBytes / 2]);
+      len_in_bytes = WebRtcG7221_Encode16(encoder_inst16_ptr_, left_channel,
+                                               320, &out_bits[0]);
+      if (num_channels_ == 2) {
+        len_in_bytes += WebRtcG7221_Encode16(encoder_inst16_ptr_right_,
+                                             right_channel, 320,
+                                             &out_bits[len_in_bytes / 2]);
       }
       break;
     }
     case 24000: {
-      lenInBytes = WebRtcG7221_Encode24(_encoderInst24Ptr, leftChannel, 320,
-                                        &outB[0]);
-      if (_noChannels == 2) {
-        lenInBytes += WebRtcG7221_Encode24(_encoderInst24PtrR, rightChannel,
-                                           320, &outB[lenInBytes / 2]);
+      len_in_bytes = WebRtcG7221_Encode24(encoder_inst24_ptr_, left_channel,
+                                          320, &out_bits[0]);
+      if (num_channels_ == 2) {
+        len_in_bytes += WebRtcG7221_Encode24(encoder_inst24_ptr_right_,
+                                             right_channel, 320,
+                                             &out_bits[len_in_bytes / 2]);
       }
       break;
     }
     case 32000: {
-      lenInBytes = WebRtcG7221_Encode32(_encoderInst32Ptr, leftChannel, 320,
-                                        &outB[0]);
-      if (_noChannels == 2) {
-        lenInBytes += WebRtcG7221_Encode32(_encoderInst32PtrR, rightChannel,
-                                           320, &outB[lenInBytes / 2]);
+      len_in_bytes = WebRtcG7221_Encode32(encoder_inst32_ptr_, left_channel,
+                                          320, &out_bits[0]);
+      if (num_channels_ == 2) {
+        len_in_bytes += WebRtcG7221_Encode32(encoder_inst32_ptr_right_,
+                                             right_channel, 320,
+                                             &out_bits[len_in_bytes / 2]);
       }
       break;
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "InternalInitEncode: Wrong rate for G722_1.");
       return -1;
     }
   }
-  memcpy(bitStream, outB, lenInBytes);
-  *bitStreamLenByte = lenInBytes;
+  memcpy(bitstream, out_bits, len_in_bytes);
+  *bitstream_len_byte = len_in_bytes;
 
   // increment the read index this tell the caller that how far
   // we have gone forward in reading the audio buffer
-  _inAudioIxRead += 320 * _noChannels;
-  return *bitStreamLenByte;
+  in_audio_ix_read_ += 320 * num_channels_;
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMG722_1::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                    WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMG722_1::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                    WebRtc_Word16 /* bitstream_len_byte */,
                                     WebRtc_Word16* /* audio */,
-                                    WebRtc_Word16* /* audioSamples */,
-                                    WebRtc_Word8* /* speechType */) {
+                                    WebRtc_Word16* /* audio_samples */,
+                                    WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
 WebRtc_Word16 ACMG722_1::InternalInitEncoder(
-    WebRtcACMCodecParams* codecParams) {
+    WebRtcACMCodecParams* codec_params) {
   WebRtc_Word16 ret;
 
-  switch (_operationalRate) {
+  switch (operational_rate_) {
     case 16000: {
-      ret = WebRtcG7221_EncoderInit16(_encoderInst16PtrR);
+      ret = WebRtcG7221_EncoderInit16(encoder_inst16_ptr_right_);
       if (ret < 0) {
         return ret;
       }
-      return WebRtcG7221_EncoderInit16(_encoderInst16Ptr);
+      return WebRtcG7221_EncoderInit16(encoder_inst16_ptr_);
     }
     case 24000: {
-      ret = WebRtcG7221_EncoderInit24(_encoderInst24PtrR);
+      ret = WebRtcG7221_EncoderInit24(encoder_inst24_ptr_right_);
       if (ret < 0) {
         return ret;
       }
-      return WebRtcG7221_EncoderInit24(_encoderInst24Ptr);
+      return WebRtcG7221_EncoderInit24(encoder_inst24_ptr_);
     }
     case 32000: {
-      ret = WebRtcG7221_EncoderInit32(_encoderInst32PtrR);
+      ret = WebRtcG7221_EncoderInit32(encoder_inst32_ptr_right_);
       if (ret < 0) {
         return ret;
       }
-      return WebRtcG7221_EncoderInit32(_encoderInst32Ptr);
+      return WebRtcG7221_EncoderInit32(encoder_inst32_ptr_);
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError,Inst webrtc::kTraceAudioCoding,
-                   _uniqueID, "InternalInitEncoder: Wrong rate for G722_1.");
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding,
+                   unique_id_, "InternalInitEncoder: Wrong rate for G722_1.");
       return -1;
     }
   }
 }
 
 WebRtc_Word16 ACMG722_1::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
-  switch (_operationalRate) {
+    WebRtcACMCodecParams* /* codec_params */) {
+  switch (operational_rate_) {
     case 16000: {
-      return WebRtcG7221_DecoderInit16(_decoderInst16Ptr);
+      return WebRtcG7221_DecoderInit16(decoder_inst16_ptr_);
     }
     case 24000: {
-      return WebRtcG7221_DecoderInit24(_decoderInst24Ptr);
+      return WebRtcG7221_DecoderInit24(decoder_inst24_ptr_);
     }
     case 32000: {
-      return WebRtcG7221_DecoderInit32(_decoderInst32Ptr);
+      return WebRtcG7221_DecoderInit32(decoder_inst32_ptr_);
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "InternalInitDecoder: Wrong rate for G722_1.");
       return -1;
     }
   }
 }
 
-WebRtc_Word32 ACMG722_1::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                  const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
+WebRtc_Word32 ACMG722_1::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                  const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
     // Todo:
     // log error
     return -1;
@@ -365,27 +369,27 @@
   // "SET_CODEC_PAR" & "SET_G722_1_XX_FUNCTION."
   // Then return the structure back to NetEQ to add the codec to it's
   // database.
-  switch (_operationalRate) {
+  switch (operational_rate_) {
     case 16000: {
-      SET_CODEC_PAR((codecDef), kDecoderG722_1_16, codecInst.pltype,
-          _decoderInst16Ptr, 16000);
-      SET_G722_1_16_FUNCTIONS((codecDef));
+      SET_CODEC_PAR((codec_def), kDecoderG722_1_16, codec_inst.pltype,
+                    decoder_inst16_ptr_, 16000);
+      SET_G722_1_16_FUNCTIONS((codec_def));
       break;
     }
     case 24000: {
-      SET_CODEC_PAR((codecDef), kDecoderG722_1_24, codecInst.pltype,
-          _decoderInst24Ptr, 16000);
-      SET_G722_1_24_FUNCTIONS((codecDef));
+      SET_CODEC_PAR((codec_def), kDecoderG722_1_24, codec_inst.pltype,
+                    decoder_inst24_ptr_, 16000);
+      SET_G722_1_24_FUNCTIONS((codec_def));
       break;
     }
     case 32000: {
-      SET_CODEC_PAR((codecDef), kDecoderG722_1_32, codecInst.pltype,
-          _decoderInst32Ptr, 16000);
-      SET_G722_1_32_FUNCTIONS((codecDef));
+      SET_CODEC_PAR((codec_def), kDecoderG722_1_32, codec_inst.pltype,
+                    decoder_inst32_ptr_, 16000);
+      SET_G722_1_32_FUNCTIONS((codec_def));
       break;
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "CodecDef: Wrong rate for G722_1.");
       return -1;
     }
@@ -398,27 +402,27 @@
 }
 
 WebRtc_Word16 ACMG722_1::InternalCreateEncoder() {
-  if ((_encoderInstPtr == NULL) || (_encoderInstPtrRight == NULL)) {
+  if ((encoder_inst_ptr_ == NULL) || (encoder_inst_ptr_right_ == NULL)) {
     return -1;
   }
-  switch (_operationalRate) {
+  switch (operational_rate_) {
     case 16000: {
-      WebRtcG7221_CreateEnc16(&_encoderInst16Ptr);
-      WebRtcG7221_CreateEnc16(&_encoderInst16PtrR);
+      WebRtcG7221_CreateEnc16(&encoder_inst16_ptr_);
+      WebRtcG7221_CreateEnc16(&encoder_inst16_ptr_right_);
       break;
     }
     case 24000: {
-      WebRtcG7221_CreateEnc24(&_encoderInst24Ptr);
-      WebRtcG7221_CreateEnc24(&_encoderInst24PtrR);
+      WebRtcG7221_CreateEnc24(&encoder_inst24_ptr_);
+      WebRtcG7221_CreateEnc24(&encoder_inst24_ptr_right_);
       break;
     }
     case 32000: {
-      WebRtcG7221_CreateEnc32(&_encoderInst32Ptr);
-      WebRtcG7221_CreateEnc32(&_encoderInst32PtrR);
+      WebRtcG7221_CreateEnc32(&encoder_inst32_ptr_);
+      WebRtcG7221_CreateEnc32(&encoder_inst32_ptr_right_);
       break;
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "InternalCreateEncoder: Wrong rate for G722_1.");
       return -1;
     }
@@ -427,40 +431,40 @@
 }
 
 void ACMG722_1::DestructEncoderSafe() {
-  _encoderExist = false;
-  _encoderInitialized = false;
-  if (_encoderInstPtr != NULL) {
-    delete _encoderInstPtr;
-    _encoderInstPtr = NULL;
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
+  if (encoder_inst_ptr_ != NULL) {
+    delete encoder_inst_ptr_;
+    encoder_inst_ptr_ = NULL;
   }
-  if (_encoderInstPtrRight != NULL) {
-    delete _encoderInstPtrRight;
-    _encoderInstPtrRight = NULL;
+  if (encoder_inst_ptr_right_ != NULL) {
+    delete encoder_inst_ptr_right_;
+    encoder_inst_ptr_right_ = NULL;
   }
-  _encoderInst16Ptr = NULL;
-  _encoderInst24Ptr = NULL;
-  _encoderInst32Ptr = NULL;
+  encoder_inst16_ptr_ = NULL;
+  encoder_inst24_ptr_ = NULL;
+  encoder_inst32_ptr_ = NULL;
 }
 
 WebRtc_Word16 ACMG722_1::InternalCreateDecoder() {
-  if (_decoderInstPtr == NULL) {
+  if (decoder_inst_ptr_ == NULL) {
     return -1;
   }
-  switch (_operationalRate) {
+  switch (operational_rate_) {
     case 16000: {
-      WebRtcG7221_CreateDec16(&_decoderInst16Ptr);
+      WebRtcG7221_CreateDec16(&decoder_inst16_ptr_);
       break;
     }
     case 24000: {
-      WebRtcG7221_CreateDec24(&_decoderInst24Ptr);
+      WebRtcG7221_CreateDec24(&decoder_inst24_ptr_);
       break;
     }
     case 32000: {
-      WebRtcG7221_CreateDec32(&_decoderInst32Ptr);
+      WebRtcG7221_CreateDec32(&decoder_inst32_ptr_);
       break;
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "InternalCreateDecoder: Wrong rate for G722_1.");
       return -1;
     }
@@ -469,24 +473,24 @@
 }
 
 void ACMG722_1::DestructDecoderSafe() {
-  _decoderExist = false;
-  _decoderInitialized = false;
-  if (_decoderInstPtr != NULL) {
-    delete _decoderInstPtr;
-    _decoderInstPtr = NULL;
+  decoder_exist_ = false;
+  decoder_initialized_ = false;
+  if (decoder_inst_ptr_ != NULL) {
+    delete decoder_inst_ptr_;
+    decoder_inst_ptr_ = NULL;
   }
-  _decoderInst16Ptr = NULL;
-  _decoderInst24Ptr = NULL;
-  _decoderInst32Ptr = NULL;
+  decoder_inst16_ptr_ = NULL;
+  decoder_inst24_ptr_ = NULL;
+  decoder_inst32_ptr_ = NULL;
 }
 
-void ACMG722_1::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    delete ptrInst;
+void ACMG722_1::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    delete ptr_inst;
   }
   return;
 }
 
 #endif
 
-} // namespace webrtc
+}  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_g7221.h b/webrtc/modules/audio_coding/main/source/acm_g7221.h
index af12475..9b4cb91 100644
--- a/webrtc/modules/audio_coding/main/source/acm_g7221.h
+++ b/webrtc/modules/audio_coding/main/source/acm_g7221.h
@@ -8,10 +8,10 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G722_1_H_
-#define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G722_1_H_
+#ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G7221_H_
+#define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G7221_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 // forward declaration
 struct G722_1_16_encinst_t_;
@@ -26,26 +26,27 @@
 
 class ACMG722_1: public ACMGenericCodec {
  public:
-  ACMG722_1(WebRtc_Word16 codecID);
+  explicit ACMG722_1(WebRtc_Word16 codec_id);
   ~ACMG722_1();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
-                           WebRtc_Word16* audio, WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
+                           WebRtc_Word16* audio, WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -55,28 +56,28 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
-  WebRtc_Word32 _operationalRate;
+  WebRtc_Word32 operational_rate_;
 
-  G722_1_Inst_t_* _encoderInstPtr;
-  G722_1_Inst_t_* _encoderInstPtrRight; //Used in stereo mode
-  G722_1_Inst_t_* _decoderInstPtr;
+  G722_1_Inst_t_* encoder_inst_ptr_;
+  G722_1_Inst_t_* encoder_inst_ptr_right_;  // Used in stereo mode
+  G722_1_Inst_t_* decoder_inst_ptr_;
 
   // Only one set of these pointer is valid at any instance
-  G722_1_16_encinst_t_* _encoderInst16Ptr;
-  G722_1_16_encinst_t_* _encoderInst16PtrR;
-  G722_1_24_encinst_t_* _encoderInst24Ptr;
-  G722_1_24_encinst_t_* _encoderInst24PtrR;
-  G722_1_32_encinst_t_* _encoderInst32Ptr;
-  G722_1_32_encinst_t_* _encoderInst32PtrR;
+  G722_1_16_encinst_t_* encoder_inst16_ptr_;
+  G722_1_16_encinst_t_* encoder_inst16_ptr_right_;
+  G722_1_24_encinst_t_* encoder_inst24_ptr_;
+  G722_1_24_encinst_t_* encoder_inst24_ptr_right_;
+  G722_1_32_encinst_t_* encoder_inst32_ptr_;
+  G722_1_32_encinst_t_* encoder_inst32_ptr_right_;
 
   // Only one of these pointer is valid at any instance
-  G722_1_16_decinst_t_* _decoderInst16Ptr;
-  G722_1_24_decinst_t_* _decoderInst24Ptr;
-  G722_1_32_decinst_t_* _decoderInst32Ptr;
+  G722_1_16_decinst_t_* decoder_inst16_ptr_;
+  G722_1_24_decinst_t_* decoder_inst24_ptr_;
+  G722_1_32_decinst_t_* decoder_inst32_ptr_;
 };
 
-} // namespace webrtc
+}  // namespace webrtc
 
-#endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G722_1_H_
+#endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G7221_H_
diff --git a/webrtc/modules/audio_coding/main/source/acm_g7221c.cc b/webrtc/modules/audio_coding/main/source/acm_g7221c.cc
index 6d055d6..3930ffa 100644
--- a/webrtc/modules/audio_coding/main/source/acm_g7221c.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_g7221c.cc
@@ -8,13 +8,14 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_g7221c.h"
-#include "acm_codec_database.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
-#include "trace.h"
+#include "webrtc/modules/audio_coding/main/source/acm_g7221c.h"
+
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 #ifdef WEBRTC_CODEC_G722_1C
 // NOTE! G.722.1C is not included in the open-source package. The following
@@ -24,62 +25,63 @@
 //
 // The API in the header file should match the one below.
 //
-// int16_t WebRtcG7221C_CreateEnc24(G722_1C_24_encinst_t_** encInst);
-// int16_t WebRtcG7221C_CreateEnc32(G722_1C_32_encinst_t_** encInst);
-// int16_t WebRtcG7221C_CreateEnc48(G722_1C_48_encinst_t_** encInst);
-// int16_t WebRtcG7221C_CreateDec24(G722_1C_24_decinst_t_** decInst);
-// int16_t WebRtcG7221C_CreateDec32(G722_1C_32_decinst_t_** decInst);
-// int16_t WebRtcG7221C_CreateDec48(G722_1C_48_decinst_t_** decInst);
+
+// int16_t WebRtcG7221C_CreateEnc24(G722_1C_24_encinst_t_** enc_inst);
+// int16_t WebRtcG7221C_CreateEnc32(G722_1C_32_encinst_t_** enc_inst);
+// int16_t WebRtcG7221C_CreateEnc48(G722_1C_48_encinst_t_** enc_inst);
+// int16_t WebRtcG7221C_CreateDec24(G722_1C_24_decinst_t_** dec_inst);
+// int16_t WebRtcG7221C_CreateDec32(G722_1C_32_decinst_t_** dec_inst);
+// int16_t WebRtcG7221C_CreateDec48(G722_1C_48_decinst_t_** dec_inst);
 //
-// int16_t WebRtcG7221C_FreeEnc24(G722_1C_24_encinst_t_** encInst);
-// int16_t WebRtcG7221C_FreeEnc32(G722_1C_32_encinst_t_** encInst);
-// int16_t WebRtcG7221C_FreeEnc48(G722_1C_48_encinst_t_** encInst);
-// int16_t WebRtcG7221C_FreeDec24(G722_1C_24_decinst_t_** decInst);
-// int16_t WebRtcG7221C_FreeDec32(G722_1C_32_decinst_t_** decInst);
-// int16_t WebRtcG7221C_FreeDec48(G722_1C_48_decinst_t_** decInst);
+// int16_t WebRtcG7221C_FreeEnc24(G722_1C_24_encinst_t_** enc_inst);
+// int16_t WebRtcG7221C_FreeEnc32(G722_1C_32_encinst_t_** enc_inst);
+// int16_t WebRtcG7221C_FreeEnc48(G722_1C_48_encinst_t_** enc_inst);
+// int16_t WebRtcG7221C_FreeDec24(G722_1C_24_decinst_t_** dec_inst);
+// int16_t WebRtcG7221C_FreeDec32(G722_1C_32_decinst_t_** dec_inst);
+// int16_t WebRtcG7221C_FreeDec48(G722_1C_48_decinst_t_** dec_inst);
 //
-// int16_t WebRtcG7221C_EncoderInit24(G722_1C_24_encinst_t_* encInst);
-// int16_t WebRtcG7221C_EncoderInit32(G722_1C_32_encinst_t_* encInst);
-// int16_t WebRtcG7221C_EncoderInit48(G722_1C_48_encinst_t_* encInst);
-// int16_t WebRtcG7221C_DecoderInit24(G722_1C_24_decinst_t_* decInst);
-// int16_t WebRtcG7221C_DecoderInit32(G722_1C_32_decinst_t_* decInst);
-// int16_t WebRtcG7221C_DecoderInit48(G722_1C_48_decinst_t_* decInst);
+// int16_t WebRtcG7221C_EncoderInit24(G722_1C_24_encinst_t_* enc_inst);
+// int16_t WebRtcG7221C_EncoderInit32(G722_1C_32_encinst_t_* enc_inst);
+// int16_t WebRtcG7221C_EncoderInit48(G722_1C_48_encinst_t_* enc_inst);
+// int16_t WebRtcG7221C_DecoderInit24(G722_1C_24_decinst_t_* dec_inst);
+// int16_t WebRtcG7221C_DecoderInit32(G722_1C_32_decinst_t_* dec_inst);
+// int16_t WebRtcG7221C_DecoderInit48(G722_1C_48_decinst_t_* dec_inst);
 //
-// int16_t WebRtcG7221C_Encode24(G722_1C_24_encinst_t_* encInst,
+// int16_t WebRtcG7221C_Encode24(G722_1C_24_encinst_t_* enc_inst,
 //                               int16_t* input,
 //                               int16_t len,
 //                               int16_t* output);
-// int16_t WebRtcG7221C_Encode32(G722_1C_32_encinst_t_* encInst,
+// int16_t WebRtcG7221C_Encode32(G722_1C_32_encinst_t_* enc_inst,
 //                               int16_t* input,
 //                               int16_t len,
 //                               int16_t* output);
-// int16_t WebRtcG7221C_Encode48(G722_1C_48_encinst_t_* encInst,
+// int16_t WebRtcG7221C_Encode48(G722_1C_48_encinst_t_* enc_inst,
 //                               int16_t* input,
 //                               int16_t len,
 //                               int16_t* output);
 //
-// int16_t WebRtcG7221C_Decode24(G722_1C_24_decinst_t_* decInst,
+// int16_t WebRtcG7221C_Decode24(G722_1C_24_decinst_t_* dec_inst,
 //                               int16_t* bitstream,
 //                               int16_t len,
 //                               int16_t* output);
-// int16_t WebRtcG7221C_Decode32(G722_1C_32_decinst_t_* decInst,
+// int16_t WebRtcG7221C_Decode32(G722_1C_32_decinst_t_* dec_inst,
 //                               int16_t* bitstream,
 //                               int16_t len,
 //                               int16_t* output);
-// int16_t WebRtcG7221C_Decode48(G722_1C_48_decinst_t_* decInst,
+// int16_t WebRtcG7221C_Decode48(G722_1C_48_decinst_t_* dec_inst,
 //                               int16_t* bitstream,
 //                               int16_t len,
 //                               int16_t* output);
 //
-// int16_t WebRtcG7221C_DecodePlc24(G722_1C_24_decinst_t_* decInst,
+// int16_t WebRtcG7221C_DecodePlc24(G722_1C_24_decinst_t_* dec_inst,
 //                                  int16_t* output,
-//                                  int16_t nrLostFrames);
-// int16_t WebRtcG7221C_DecodePlc32(G722_1C_32_decinst_t_* decInst,
+//                                  int16_t nr_lost_frames);
+// int16_t WebRtcG7221C_DecodePlc32(G722_1C_32_decinst_t_* dec_inst,
 //                                  int16_t* output,
-//                                  int16_t nrLostFrames);
-// int16_t WebRtcG7221C_DecodePlc48(G722_1C_48_decinst_t_* decInst,
+//                                  int16_t nr_lost_frames);
+// int16_t WebRtcG7221C_DecodePlc48(G722_1C_48_decinst_t_* dec_inst,
 //                                  int16_t* output,
-//                                  int16_t nrLostFrames);
+//                                  int16_t nr_lost_frames);
 #include "g7221c_interface.h"
 #endif
 
@@ -87,20 +89,20 @@
 
 #ifndef WEBRTC_CODEC_G722_1C
 
-ACMG722_1C::ACMG722_1C(WebRtc_Word16 /* codecID */)
-    : _operationalRate(-1),
-      _encoderInstPtr(NULL),
-      _encoderInstPtrRight(NULL),
-      _decoderInstPtr(NULL),
-      _encoderInst24Ptr(NULL),
-      _encoderInst24PtrR(NULL),
-      _encoderInst32Ptr(NULL),
-      _encoderInst32PtrR(NULL),
-      _encoderInst48Ptr(NULL),
-      _encoderInst48PtrR(NULL),
-      _decoderInst24Ptr(NULL),
-      _decoderInst32Ptr(NULL),
-      _decoderInst48Ptr(NULL) {
+ACMG722_1C::ACMG722_1C(WebRtc_Word16 /* codec_id */)
+    : operational_rate_(-1),
+      encoder_inst_ptr_(NULL),
+      encoder_inst_ptr_right_(NULL),
+      decoder_inst_ptr_(NULL),
+      encoder_inst24_ptr_(NULL),
+      encoder_inst24_ptr_right_(NULL),
+      encoder_inst32_ptr_(NULL),
+      encoder_inst32_ptr_right_(NULL),
+      encoder_inst48_ptr_(NULL),
+      encoder_inst48_ptr_right_(NULL),
+      decoder_inst24_ptr_(NULL),
+      decoder_inst32_ptr_(NULL),
+      decoder_inst48_ptr_(NULL) {
   return;
 }
 
@@ -109,31 +111,31 @@
 }
 
 WebRtc_Word16 ACMG722_1C::InternalEncode(
-    WebRtc_UWord8* /* bitStream */,
-    WebRtc_Word16* /* bitStreamLenByte */) {
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
-WebRtc_Word16 ACMG722_1C::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-    WebRtc_Word16 /* bitStreamLenByte */,
-    WebRtc_Word16* /* audio */,
-    WebRtc_Word16* /* audioSamples */,
-    WebRtc_Word8* /* speechType */) {
+WebRtc_Word16 ACMG722_1C::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                     WebRtc_Word16 /* bitstream_len_byte */,
+                                     WebRtc_Word16* /* audio */,
+                                     WebRtc_Word16* /* audio_samples */,
+                                     WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
 WebRtc_Word16 ACMG722_1C::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMG722_1C::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-WebRtc_Word32 ACMG722_1C::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef */,
-    const CodecInst& /* codecInst */) {
+WebRtc_Word32 ACMG722_1C::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def */,
+                                   const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -157,66 +159,74 @@
   return;
 }
 
-void ACMG722_1C::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMG722_1C::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
 #else     //===================== Actual Implementation =======================
-ACMG722_1C::ACMG722_1C(WebRtc_Word16 codecID) :
-  _encoderInstPtr(NULL), _encoderInstPtrRight(NULL), _decoderInstPtr(NULL),
-      _encoderInst24Ptr(NULL), _encoderInst24PtrR(NULL), _encoderInst32Ptr(NULL),
-      _encoderInst32PtrR(NULL), _encoderInst48Ptr(NULL), _encoderInst48PtrR(NULL),
-      _decoderInst24Ptr(NULL), _decoderInst32Ptr(NULL), _decoderInst48Ptr(NULL) {
-  _codecID = codecID;
-  if (_codecID == ACMCodecDB::kG722_1C_24) {
-    _operationalRate = 24000;
-  } else if (_codecID == ACMCodecDB::kG722_1C_32) {
-    _operationalRate = 32000;
-  } else if (_codecID == ACMCodecDB::kG722_1C_48) {
-    _operationalRate = 48000;
+ACMG722_1C::ACMG722_1C(WebRtc_Word16 codec_id)
+    : encoder_inst_ptr_(NULL),
+      encoder_inst_ptr_right_(NULL),
+      decoder_inst_ptr_(NULL),
+      encoder_inst24_ptr_(NULL),
+      encoder_inst24_ptr_right_(NULL),
+      encoder_inst32_ptr_(NULL),
+      encoder_inst32_ptr_right_(NULL),
+      encoder_inst48_ptr_(NULL),
+      encoder_inst48_ptr_right_(NULL),
+      decoder_inst24_ptr_(NULL),
+      decoder_inst32_ptr_(NULL),
+      decoder_inst48_ptr_(NULL) {
+  codec_id_ = codec_id;
+  if (codec_id_ == ACMCodecDB::kG722_1C_24) {
+    operational_rate_ = 24000;
+  } else if (codec_id_ == ACMCodecDB::kG722_1C_32) {
+    operational_rate_ = 32000;
+  } else if (codec_id_ == ACMCodecDB::kG722_1C_48) {
+    operational_rate_ = 48000;
   } else {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Wrong codec id for G722_1c.");
-    _operationalRate = -1;
+    operational_rate_ = -1;
   }
   return;
 }
 
 ACMG722_1C::~ACMG722_1C() {
-  if (_encoderInstPtr != NULL) {
-    delete _encoderInstPtr;
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    delete encoder_inst_ptr_;
+    encoder_inst_ptr_ = NULL;
   }
-  if (_encoderInstPtrRight != NULL) {
-    delete _encoderInstPtrRight;
-    _encoderInstPtrRight = NULL;
+  if (encoder_inst_ptr_right_ != NULL) {
+    delete encoder_inst_ptr_right_;
+    encoder_inst_ptr_right_ = NULL;
   }
-  if (_decoderInstPtr != NULL) {
-    delete _decoderInstPtr;
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    delete decoder_inst_ptr_;
+    decoder_inst_ptr_ = NULL;
   }
 
-  switch (_operationalRate) {
+  switch (operational_rate_) {
     case 24000: {
-      _encoderInst24Ptr = NULL;
-      _encoderInst24PtrR = NULL;
-      _decoderInst24Ptr = NULL;
+      encoder_inst24_ptr_ = NULL;
+      encoder_inst24_ptr_right_ = NULL;
+      decoder_inst24_ptr_ = NULL;
       break;
     }
     case 32000: {
-      _encoderInst32Ptr = NULL;
-      _encoderInst32PtrR = NULL;
-      _decoderInst32Ptr = NULL;
+      encoder_inst32_ptr_ = NULL;
+      encoder_inst32_ptr_right_ = NULL;
+      decoder_inst32_ptr_ = NULL;
       break;
     }
     case 48000: {
-      _encoderInst48Ptr = NULL;
-      _encoderInst48PtrR = NULL;
-      _decoderInst48Ptr = NULL;
+      encoder_inst48_ptr_ = NULL;
+      encoder_inst48_ptr_right_ = NULL;
+      decoder_inst48_ptr_ = NULL;
       break;
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "Wrong rate for G722_1c.");
       break;
     }
@@ -224,104 +234,107 @@
   return;
 }
 
-WebRtc_Word16 ACMG722_1C::InternalEncode(WebRtc_UWord8* bitStream,
-                                         WebRtc_Word16* bitStreamLenByte) {
-  WebRtc_Word16 leftChannel[640];
-  WebRtc_Word16 rightChannel[640];
-  WebRtc_Word16 lenInBytes;
-  WebRtc_Word16 outB[240];
+WebRtc_Word16 ACMG722_1C::InternalEncode(WebRtc_UWord8* bitstream,
+                                         WebRtc_Word16* bitstream_len_byte) {
+  WebRtc_Word16 left_channel[640];
+  WebRtc_Word16 right_channel[640];
+  WebRtc_Word16 len_in_bytes;
+  WebRtc_Word16 out_bits[240];
 
   // If stereo, split input signal in left and right channel before encoding
-  if (_noChannels == 2) {
-    for (int i = 0, j = 0; i < _frameLenSmpl * 2; i += 2, j++) {
-      leftChannel[j] = _inAudio[_inAudioIxRead + i];
-      rightChannel[j] = _inAudio[_inAudioIxRead + i + 1];
+  if (num_channels_ == 2) {
+    for (int i = 0, j = 0; i < frame_len_smpl_ * 2; i += 2, j++) {
+      left_channel[j] = in_audio_[in_audio_ix_read_ + i];
+      right_channel[j] = in_audio_[in_audio_ix_read_ + i + 1];
     }
   } else {
-    memcpy(leftChannel, &_inAudio[_inAudioIxRead], 640);
+    memcpy(left_channel, &in_audio_[in_audio_ix_read_], 640);
   }
 
-  switch (_operationalRate) {
+  switch (operational_rate_) {
     case 24000: {
-      lenInBytes = WebRtcG7221C_Encode24(_encoderInst24Ptr, leftChannel, 640,
-                                         &outB[0]);
-      if (_noChannels == 2) {
-        lenInBytes += WebRtcG7221C_Encode24(_encoderInst24PtrR, rightChannel,
-                                            640, &outB[lenInBytes / 2]);
+      len_in_bytes = WebRtcG7221C_Encode24(encoder_inst24_ptr_, left_channel,
+                                           640, &out_bits[0]);
+      if (num_channels_ == 2) {
+        len_in_bytes += WebRtcG7221C_Encode24(encoder_inst24_ptr_right_,
+                                              right_channel, 640,
+                                              &out_bits[len_in_bytes / 2]);
       }
       break;
     }
     case 32000: {
-      lenInBytes = WebRtcG7221C_Encode32(_encoderInst32Ptr, leftChannel, 640,
-                                         &outB[0]);
-      if (_noChannels == 2) {
-        lenInBytes += WebRtcG7221C_Encode32(_encoderInst32PtrR, rightChannel,
-                                            640, &outB[lenInBytes / 2]);
+      len_in_bytes = WebRtcG7221C_Encode32(encoder_inst32_ptr_, left_channel,
+                                           640, &out_bits[0]);
+      if (num_channels_ == 2) {
+        len_in_bytes += WebRtcG7221C_Encode32(encoder_inst32_ptr_right_,
+                                              right_channel, 640,
+                                              &out_bits[len_in_bytes / 2]);
       }
       break;
     }
     case 48000: {
-      lenInBytes = WebRtcG7221C_Encode48(_encoderInst48Ptr, leftChannel, 640,
-                                         &outB[0]);
-      if (_noChannels == 2) {
-        lenInBytes += WebRtcG7221C_Encode48(_encoderInst48PtrR, rightChannel,
-                                            640, &outB[lenInBytes / 2]);
+      len_in_bytes = WebRtcG7221C_Encode48(encoder_inst48_ptr_, left_channel,
+                                           640, &out_bits[0]);
+      if (num_channels_ == 2) {
+        len_in_bytes += WebRtcG7221C_Encode48(encoder_inst48_ptr_right_,
+                                              right_channel, 640,
+                                              &out_bits[len_in_bytes / 2]);
       }
       break;
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "InternalEncode: Wrong rate for G722_1c.");
       return -1;
     }
   }
 
-  memcpy(bitStream, outB, lenInBytes);
-  *bitStreamLenByte = lenInBytes;
+  memcpy(bitstream, out_bits, len_in_bytes);
+  *bitstream_len_byte = len_in_bytes;
 
   // increment the read index this tell the caller that how far
   // we have gone forward in reading the audio buffer
-  _inAudioIxRead += 640 * _noChannels;
+  in_audio_ix_read_ += 640 * num_channels_;
 
-  return *bitStreamLenByte;
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMG722_1C::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                     WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMG722_1C::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                     WebRtc_Word16 /* bitstream_len_byte */,
                                      WebRtc_Word16* /* audio */,
-                                     WebRtc_Word16* /* audioSamples */,
-                                     WebRtc_Word8* /* speechType */) {
+                                     WebRtc_Word16* /* audio_samples */,
+                                     WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
 WebRtc_Word16 ACMG722_1C::InternalInitEncoder(
-    WebRtcACMCodecParams* codecParams) {
+    WebRtcACMCodecParams* codec_params) {
   WebRtc_Word16 ret;
 
-  switch (_operationalRate) {
+  switch (operational_rate_) {
     case 24000: {
-      ret = WebRtcG7221C_EncoderInit24(_encoderInst24PtrR);
+      ret = WebRtcG7221C_EncoderInit24(encoder_inst24_ptr_right_);
       if (ret < 0) {
         return ret;
       }
-      return WebRtcG7221C_EncoderInit24(_encoderInst24Ptr);
+      return WebRtcG7221C_EncoderInit24(encoder_inst24_ptr_);
     }
     case 32000: {
-      ret = WebRtcG7221C_EncoderInit32(_encoderInst32PtrR);
+      ret = WebRtcG7221C_EncoderInit32(encoder_inst32_ptr_right_);
       if (ret < 0) {
         return ret;
       }
-      return WebRtcG7221C_EncoderInit32(_encoderInst32Ptr);
+      return WebRtcG7221C_EncoderInit32(encoder_inst32_ptr_);
     }
     case 48000: {
-      ret = WebRtcG7221C_EncoderInit48(_encoderInst48PtrR);
+      ret = WebRtcG7221C_EncoderInit48(encoder_inst48_ptr_right_);
       if (ret < 0) {
         return ret;
       }
-      return WebRtcG7221C_EncoderInit48(_encoderInst48Ptr);
+      return WebRtcG7221C_EncoderInit48(encoder_inst48_ptr_);
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "InternalInitEncode: Wrong rate for G722_1c.");
       return -1;
     }
@@ -329,30 +342,29 @@
 }
 
 WebRtc_Word16 ACMG722_1C::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
-  switch (_operationalRate) {
+    WebRtcACMCodecParams* /* codec_params */) {
+  switch (operational_rate_) {
     case 24000: {
-      return WebRtcG7221C_DecoderInit24(_decoderInst24Ptr);
+      return WebRtcG7221C_DecoderInit24(decoder_inst24_ptr_);
     }
     case 32000: {
-      return WebRtcG7221C_DecoderInit32(_decoderInst32Ptr);
+      return WebRtcG7221C_DecoderInit32(decoder_inst32_ptr_);
     }
     case 48000: {
-      return WebRtcG7221C_DecoderInit48(_decoderInst48Ptr);
+      return WebRtcG7221C_DecoderInit48(decoder_inst48_ptr_);
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "InternalInitDecoder: Wrong rate for G722_1c.");
       return -1;
     }
   }
 }
 
-WebRtc_Word32 ACMG722_1C::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                   const CodecInst& codecInst) {
-
-  if (!_decoderInitialized) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+WebRtc_Word32 ACMG722_1C::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                   const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "CodeDef: decoder not initialized for G722_1c");
     return -1;
   }
@@ -364,27 +376,27 @@
   // "SET_CODEC_PAR" & "SET_G722_1_XX_FUNCTION."
   // Then return the structure back to NetEQ to add the codec to it's
   // database.
-  switch (_operationalRate) {
+  switch (operational_rate_) {
     case 24000: {
-      SET_CODEC_PAR((codecDef), kDecoderG722_1C_24, codecInst.pltype,
-          _decoderInst24Ptr, 32000);
-      SET_G722_1C_24_FUNCTIONS((codecDef));
+      SET_CODEC_PAR((codec_def), kDecoderG722_1C_24, codec_inst.pltype,
+                    decoder_inst24_ptr_, 32000);
+      SET_G722_1C_24_FUNCTIONS((codec_def));
       break;
     }
     case 32000: {
-      SET_CODEC_PAR((codecDef), kDecoderG722_1C_32, codecInst.pltype,
-          _decoderInst32Ptr, 32000);
-      SET_G722_1C_32_FUNCTIONS((codecDef));
+      SET_CODEC_PAR((codec_def), kDecoderG722_1C_32, codec_inst.pltype,
+                    decoder_inst32_ptr_, 32000);
+      SET_G722_1C_32_FUNCTIONS((codec_def));
       break;
     }
     case 48000: {
-      SET_CODEC_PAR((codecDef), kDecoderG722_1C_32, codecInst.pltype,
-          _decoderInst48Ptr, 32000);
-      SET_G722_1C_48_FUNCTIONS((codecDef));
+      SET_CODEC_PAR((codec_def), kDecoderG722_1C_32, codec_inst.pltype,
+                    decoder_inst48_ptr_, 32000);
+      SET_G722_1C_48_FUNCTIONS((codec_def));
       break;
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "CodeDef: Wrong rate for G722_1c.");
       return -1;
     }
@@ -398,27 +410,27 @@
 }
 
 WebRtc_Word16 ACMG722_1C::InternalCreateEncoder() {
-  if ((_encoderInstPtr == NULL) || (_encoderInstPtrRight == NULL)) {
+  if ((encoder_inst_ptr_ == NULL) || (encoder_inst_ptr_right_ == NULL)) {
     return -1;
   }
-  switch (_operationalRate) {
+  switch (operational_rate_) {
     case 24000: {
-      WebRtcG7221C_CreateEnc24(&_encoderInst24Ptr);
-      WebRtcG7221C_CreateEnc24(&_encoderInst24PtrR);
+      WebRtcG7221C_CreateEnc24(&encoder_inst24_ptr_);
+      WebRtcG7221C_CreateEnc24(&encoder_inst24_ptr_right_);
       break;
     }
     case 32000: {
-      WebRtcG7221C_CreateEnc32(&_encoderInst32Ptr);
-      WebRtcG7221C_CreateEnc32(&_encoderInst32PtrR);
+      WebRtcG7221C_CreateEnc32(&encoder_inst32_ptr_);
+      WebRtcG7221C_CreateEnc32(&encoder_inst32_ptr_right_);
       break;
     }
     case 48000: {
-      WebRtcG7221C_CreateEnc48(&_encoderInst48Ptr);
-      WebRtcG7221C_CreateEnc48(&_encoderInst48PtrR);
+      WebRtcG7221C_CreateEnc48(&encoder_inst48_ptr_);
+      WebRtcG7221C_CreateEnc48(&encoder_inst48_ptr_right_);
       break;
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "InternalCreateEncoder: Wrong rate for G722_1c.");
       return -1;
     }
@@ -427,42 +439,42 @@
 }
 
 void ACMG722_1C::DestructEncoderSafe() {
-  _encoderExist = false;
-  _encoderInitialized = false;
-  if (_encoderInstPtr != NULL) {
-    delete _encoderInstPtr;
-    _encoderInstPtr = NULL;
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
+  if (encoder_inst_ptr_ != NULL) {
+    delete encoder_inst_ptr_;
+    encoder_inst_ptr_ = NULL;
   }
-  if (_encoderInstPtrRight != NULL) {
-    delete _encoderInstPtrRight;
-    _encoderInstPtrRight = NULL;
+  if (encoder_inst_ptr_right_ != NULL) {
+    delete encoder_inst_ptr_right_;
+    encoder_inst_ptr_right_ = NULL;
   }
-  _encoderInst24Ptr = NULL;
-  _encoderInst32Ptr = NULL;
-  _encoderInst48Ptr = NULL;
+  encoder_inst24_ptr_ = NULL;
+  encoder_inst32_ptr_ = NULL;
+  encoder_inst48_ptr_ = NULL;
 }
 
 WebRtc_Word16 ACMG722_1C::InternalCreateDecoder() {
-  if (_decoderInstPtr == NULL) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  if (decoder_inst_ptr_ == NULL) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalCreateEncoder: cannot create decoder");
     return -1;
   }
-  switch (_operationalRate) {
+  switch (operational_rate_) {
     case 24000: {
-      WebRtcG7221C_CreateDec24(&_decoderInst24Ptr);
+      WebRtcG7221C_CreateDec24(&decoder_inst24_ptr_);
       break;
     }
     case 32000: {
-      WebRtcG7221C_CreateDec32(&_decoderInst32Ptr);
+      WebRtcG7221C_CreateDec32(&decoder_inst32_ptr_);
       break;
     }
     case 48000: {
-      WebRtcG7221C_CreateDec48(&_decoderInst48Ptr);
+      WebRtcG7221C_CreateDec48(&decoder_inst48_ptr_);
       break;
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "InternalCreateEncoder: Wrong rate for G722_1c.");
       return -1;
     }
@@ -471,24 +483,24 @@
 }
 
 void ACMG722_1C::DestructDecoderSafe() {
-  _decoderExist = false;
-  _decoderInitialized = false;
-  if (_decoderInstPtr != NULL) {
-    delete _decoderInstPtr;
-    _decoderInstPtr = NULL;
+  decoder_exist_ = false;
+  decoder_initialized_ = false;
+  if (decoder_inst_ptr_ != NULL) {
+    delete decoder_inst_ptr_;
+    decoder_inst_ptr_ = NULL;
   }
-  _decoderInst24Ptr = NULL;
-  _decoderInst32Ptr = NULL;
-  _decoderInst48Ptr = NULL;
+  decoder_inst24_ptr_ = NULL;
+  decoder_inst32_ptr_ = NULL;
+  decoder_inst48_ptr_ = NULL;
 }
 
-void ACMG722_1C::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    delete ptrInst;
+void ACMG722_1C::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    delete ptr_inst;
   }
   return;
 }
 
 #endif
 
-} // namespace webrtc
+}  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_g7221c.h b/webrtc/modules/audio_coding/main/source/acm_g7221c.h
index ef573dc..4ce2d84 100644
--- a/webrtc/modules/audio_coding/main/source/acm_g7221c.h
+++ b/webrtc/modules/audio_coding/main/source/acm_g7221c.h
@@ -8,10 +8,10 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G722_1C_H_
-#define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G722_1C_H_
+#ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G7221C_H_
+#define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G7221C_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 // forward declaration
 struct G722_1C_24_encinst_t_;
@@ -24,67 +24,67 @@
 
 namespace webrtc {
 
-class ACMG722_1C : public ACMGenericCodec
-{
-public:
-    ACMG722_1C(WebRtc_Word16 codecID);
-    ~ACMG722_1C();
-    // for FEC
-    ACMGenericCodec* CreateInstance(void);
+class ACMG722_1C : public ACMGenericCodec {
+ public:
+  explicit ACMG722_1C(WebRtc_Word16 codec_id);
+  ~ACMG722_1C();
 
-    WebRtc_Word16 InternalEncode(
-        WebRtc_UWord8* bitstream,
-        WebRtc_Word16* bitStreamLenByte);
+  // for FEC
+  ACMGenericCodec* CreateInstance(void);
 
-    WebRtc_Word16 InternalInitEncoder(
-        WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalEncode(
+      WebRtc_UWord8* bitstream,
+      WebRtc_Word16* bitstream_len_byte);
 
-    WebRtc_Word16 InternalInitDecoder(
-        WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(
+      WebRtcACMCodecParams *codec_params);
 
-protected:
-    WebRtc_Word16 DecodeSafe(
-        WebRtc_UWord8* bitStream,
-        WebRtc_Word16  bitStreamLenByte,
-        WebRtc_Word16* audio,
-        WebRtc_Word16* audioSamples,
-        WebRtc_Word8*  speechType);
+  WebRtc_Word16 InternalInitDecoder(
+      WebRtcACMCodecParams *codec_params);
 
-    WebRtc_Word32 CodecDef(
-        WebRtcNetEQ_CodecDef& codecDef,
-        const CodecInst&      codecInst);
+ protected:
+  WebRtc_Word16 DecodeSafe(
+      WebRtc_UWord8* bitstream,
+      WebRtc_Word16 bitstream_len_byte,
+      WebRtc_Word16* audio,
+      WebRtc_Word16* audio_samples,
+      WebRtc_Word8* speech_type);
 
-    void DestructEncoderSafe();
+  WebRtc_Word32 CodecDef(
+      WebRtcNetEQ_CodecDef& codec_def,
+      const CodecInst& codec_inst);
 
-    void DestructDecoderSafe();
+  void DestructEncoderSafe();
 
-    WebRtc_Word16 InternalCreateEncoder();
+  void DestructDecoderSafe();
 
-    WebRtc_Word16 InternalCreateDecoder();
+  WebRtc_Word16 InternalCreateEncoder();
 
-    void InternalDestructEncoderInst(
-        void* ptrInst);
+  WebRtc_Word16 InternalCreateDecoder();
 
-    WebRtc_Word32    _operationalRate;
+  void InternalDestructEncoderInst(
+      void* ptr_inst);
 
-    G722_1_Inst_t_*  _encoderInstPtr;
-    G722_1_Inst_t_*  _encoderInstPtrRight; //Used in stereo mode
-    G722_1_Inst_t_*  _decoderInstPtr;
+  WebRtc_Word32 operational_rate_;
 
-    // Only one set of these pointer is valid at any instance
-    G722_1C_24_encinst_t_* _encoderInst24Ptr;
-    G722_1C_24_encinst_t_* _encoderInst24PtrR;
-    G722_1C_32_encinst_t_* _encoderInst32Ptr;
-    G722_1C_32_encinst_t_* _encoderInst32PtrR;
-    G722_1C_48_encinst_t_* _encoderInst48Ptr;
-    G722_1C_48_encinst_t_* _encoderInst48PtrR;
+  G722_1_Inst_t_* encoder_inst_ptr_;
+  G722_1_Inst_t_* encoder_inst_ptr_right_;  // Used in stereo mode
+  G722_1_Inst_t_* decoder_inst_ptr_;
 
-    // Only one of these pointer is valid at any instance
-    G722_1C_24_decinst_t_* _decoderInst24Ptr;
-    G722_1C_32_decinst_t_* _decoderInst32Ptr;
-    G722_1C_48_decinst_t_* _decoderInst48Ptr;
+  // Only one set of these pointer is valid at any instance
+  G722_1C_24_encinst_t_* encoder_inst24_ptr_;
+  G722_1C_24_encinst_t_* encoder_inst24_ptr_right_;
+  G722_1C_32_encinst_t_* encoder_inst32_ptr_;
+  G722_1C_32_encinst_t_* encoder_inst32_ptr_right_;
+  G722_1C_48_encinst_t_* encoder_inst48_ptr_;
+  G722_1C_48_encinst_t_* encoder_inst48_ptr_right_;
+
+  // Only one of these pointer is valid at any instance
+  G722_1C_24_decinst_t_* decoder_inst24_ptr_;
+  G722_1C_32_decinst_t_* decoder_inst32_ptr_;
+  G722_1C_48_decinst_t_* decoder_inst48_ptr_;
 };
 
-} // namespace webrtc;
+}  // namespace webrtc;
 
-#endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G722_1C_H_
+#endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G7221C_H_
diff --git a/webrtc/modules/audio_coding/main/source/acm_g729.cc b/webrtc/modules/audio_coding/main/source/acm_g729.cc
index f9bc781..031ccb7 100644
--- a/webrtc/modules/audio_coding/main/source/acm_g729.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_g729.cc
@@ -8,12 +8,13 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_g729.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_g729.h"
+
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 #ifdef WEBRTC_CODEC_G729
 // NOTE! G.729 is not included in the open-source package. Modify this file
@@ -26,9 +27,9 @@
 
 #ifndef WEBRTC_CODEC_G729
 
-ACMG729::ACMG729(WebRtc_Word16 /* codecID */)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL) {
+ACMG729::ACMG729(WebRtc_Word16 /* codec_id */)
+: encoder_inst_ptr_(NULL),
+  decoder_inst_ptr_(NULL) {
   return;
 }
 
@@ -36,8 +37,9 @@
   return;
 }
 
-WebRtc_Word16 ACMG729::InternalEncode(WebRtc_UWord8* /* bitStream */,
-                                      WebRtc_Word16* /* bitStreamLenByte */) {
+WebRtc_Word16 ACMG729::InternalEncode(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
@@ -50,35 +52,35 @@
 }
 
 WebRtc_Word32 ACMG729::ReplaceInternalDTXSafe(
-    const bool /*replaceInternalDTX*/) {
+    const bool /*replace_internal_dtx */) {
   return -1;
 }
 
 WebRtc_Word32 ACMG729::IsInternalDTXReplacedSafe(
-    bool* /* internalDTXReplaced */) {
+    bool* /* internal_dtx_replaced */) {
   return -1;
 }
 
-WebRtc_Word16 ACMG729::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                  WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMG729::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                  WebRtc_Word16 /* bitstream_len_byte */,
                                   WebRtc_Word16* /* audio */,
-                                  WebRtc_Word16* /* audioSamples */,
-                                  WebRtc_Word8* /* speechType */) {
+                                  WebRtc_Word16* /* audio_samples */,
+                                  WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
 WebRtc_Word16 ACMG729::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMG729::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-WebRtc_Word32 ACMG729::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef  */,
-                                const CodecInst& /* codecInst */) {
+WebRtc_Word32 ACMG729::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def  */,
+                                const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -102,63 +104,63 @@
   return;
 }
 
-void ACMG729::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMG729::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
 #else     //===================== Actual Implementation =======================
-ACMG729::ACMG729(WebRtc_Word16 codecID)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL) {
-  _codecID = codecID;
-  _hasInternalDTX = true;
+ACMG729::ACMG729(WebRtc_Word16 codec_id)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL) {
+  codec_id_ = codec_id;
+  has_internal_dtx_ = true;
   return;
 }
 
 ACMG729::~ACMG729() {
-  if (_encoderInstPtr != NULL) {
+  if (encoder_inst_ptr_ != NULL) {
     // Delete encoder memory
-    WebRtcG729_FreeEnc(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+    WebRtcG729_FreeEnc(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
-  if (_decoderInstPtr != NULL) {
+  if (decoder_inst_ptr_ != NULL) {
     // Delete decoder memory
-    WebRtcG729_FreeDec(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+    WebRtcG729_FreeDec(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
   return;
 }
 
-WebRtc_Word16 ACMG729::InternalEncode(WebRtc_UWord8* bitStream,
-                                      WebRtc_Word16* bitStreamLenByte) {
+WebRtc_Word16 ACMG729::InternalEncode(WebRtc_UWord8* bitstream,
+                                      WebRtc_Word16* bitstream_len_byte) {
   // Initialize before entering the loop
-  WebRtc_Word16 noEncodedSamples = 0;
-  WebRtc_Word16 tmpLenByte = 0;
-  WebRtc_Word16 vadDecision = 0;
-  *bitStreamLenByte = 0;
-  while (noEncodedSamples < _frameLenSmpl) {
+  WebRtc_Word16 num_encoded_samples = 0;
+  WebRtc_Word16 tmp_len_byte = 0;
+  WebRtc_Word16 vad_decision = 0;
+  *bitstream_len_byte = 0;
+  while (num_encoded_samples < frame_len_smpl_) {
     // Call G.729 encoder with pointer to encoder memory, input
     // audio, number of samples and bitsream
-    tmpLenByte = WebRtcG729_Encode(
-        _encoderInstPtr, &_inAudio[_inAudioIxRead], 80,
-        (WebRtc_Word16*) (&(bitStream[*bitStreamLenByte])));
+    tmp_len_byte = WebRtcG729_Encode(
+        encoder_inst_ptr_, &in_audio_[in_audio_ix_read_], 80,
+        (WebRtc_Word16*)(&(bitstream[*bitstream_len_byte])));
 
     // increment the read index this tell the caller that how far
     // we have gone forward in reading the audio buffer
-    _inAudioIxRead += 80;
+    in_audio_ix_read_ += 80;
 
     // sanity check
-    if (tmpLenByte < 0) {
+    if (tmp_len_byte < 0) {
       // error has happened
-      *bitStreamLenByte = 0;
+      *bitstream_len_byte = 0;
       return -1;
     }
 
     // increment number of written bytes
-    *bitStreamLenByte += tmpLenByte;
-    switch (tmpLenByte) {
+    *bitstream_len_byte += tmp_len_byte;
+    switch (tmp_len_byte) {
       case 0: {
-        if (0 == noEncodedSamples) {
+        if (0 == num_encoded_samples) {
           // this is the first 10 ms in this packet and there is
           // no data generated, perhaps DTX is enabled and the
           // codec is not generating any bit-stream for this 10 ms.
@@ -169,18 +171,18 @@
       }
       case 2: {
         // check if G.729 internal DTX is enabled
-        if (_hasInternalDTX && _dtxEnabled) {
-          vadDecision = 0;
+        if (has_internal_dtx_ && dtx_enabled_) {
+          vad_decision = 0;
           for (WebRtc_Word16 n = 0; n < MAX_FRAME_SIZE_10MSEC; n++) {
-            _vadLabel[n] = vadDecision;
+            vad_label_[n] = vad_decision;
           }
         }
         // we got a SID and have to send out this packet no matter
         // how much audio we have encoded
-        return *bitStreamLenByte;
+        return *bitstream_len_byte;
       }
       case 10: {
-        vadDecision = 1;
+        vad_decision = 1;
         // this is a valid length just continue encoding
         break;
       }
@@ -190,30 +192,30 @@
     }
 
     // update number of encoded samples
-    noEncodedSamples += 80;
+    num_encoded_samples += 80;
   }
 
   // update VAD decision vector
-  if (_hasInternalDTX && !vadDecision && _dtxEnabled) {
+  if (has_internal_dtx_ && !vad_decision && dtx_enabled_) {
     for (WebRtc_Word16 n = 0; n < MAX_FRAME_SIZE_10MSEC; n++) {
-      _vadLabel[n] = vadDecision;
+      vad_label_[n] = vad_decision;
     }
   }
 
   // done encoding, return number of encoded bytes
-  return *bitStreamLenByte;
+  return *bitstream_len_byte;
 }
 
 WebRtc_Word16 ACMG729::EnableDTX() {
-  if (_dtxEnabled) {
+  if (dtx_enabled_) {
     // DTX already enabled, do nothing
     return 0;
-  } else if (_encoderExist) {
+  } else if (encoder_exist_) {
     // Re-init the G.729 encoder to turn on DTX
-    if (WebRtcG729_EncoderInit(_encoderInstPtr, 1) < 0) {
+    if (WebRtcG729_EncoderInit(encoder_inst_ptr_, 1) < 0) {
       return -1;
     }
-    _dtxEnabled = true;
+    dtx_enabled_ = true;
     return 0;
   } else {
     return -1;
@@ -221,15 +223,15 @@
 }
 
 WebRtc_Word16 ACMG729::DisableDTX() {
-  if (!_dtxEnabled) {
+  if (!dtx_enabled_) {
     // DTX already dissabled, do nothing
     return 0;
-  } else if (_encoderExist) {
+  } else if (encoder_exist_) {
     // Re-init the G.729 decoder to turn off DTX
-    if (WebRtcG729_EncoderInit(_encoderInstPtr, 0) < 0) {
+    if (WebRtcG729_EncoderInit(encoder_inst_ptr_, 0) < 0) {
       return -1;
     }
-    _dtxEnabled = false;
+    dtx_enabled_ = false;
     return 0;
   } else {
     // encoder doesn't exists, therefore disabling is harmless
@@ -237,67 +239,67 @@
   }
 }
 
-WebRtc_Word32 ACMG729::ReplaceInternalDTXSafe(const bool replaceInternalDTX) {
+WebRtc_Word32 ACMG729::ReplaceInternalDTXSafe(const bool replace_internal_dtx) {
   // This function is used to disable the G.729 built in DTX and use an
   // external instead.
 
-  if (replaceInternalDTX == _hasInternalDTX) {
+  if (replace_internal_dtx == has_internal_dtx_) {
     // Make sure we keep the DTX/VAD setting if possible
-    bool oldEnableDTX = _dtxEnabled;
-    bool oldEnableVAD = _vadEnabled;
-    ACMVADMode oldMode = _vadMode;
-    if (replaceInternalDTX) {
+    bool old_enable_dtx = dtx_enabled_;
+    bool old_enable_vad = vad_enabled_;
+    ACMVADMode old_mode = vad_mode_;
+    if (replace_internal_dtx) {
       // Disable internal DTX before enabling external DTX
       DisableDTX();
     } else {
       // Disable external DTX before enabling internal
       ACMGenericCodec::DisableDTX();
     }
-    _hasInternalDTX = !replaceInternalDTX;
-    WebRtc_Word16 status = SetVADSafe(oldEnableDTX, oldEnableVAD, oldMode);
+    has_internal_dtx_ = !replace_internal_dtx;
+    WebRtc_Word16 status = SetVADSafe(old_enable_dtx, old_enable_vad, old_mode);
     // Check if VAD status has changed from inactive to active, or if error was
     // reported
     if (status == 1) {
-      _vadEnabled = true;
+      vad_enabled_ = true;
       return status;
     } else if (status < 0) {
-      _hasInternalDTX = replaceInternalDTX;
+      has_internal_dtx_ = replace_internal_dtx;
       return -1;
     }
   }
   return 0;
 }
 
-WebRtc_Word32 ACMG729::IsInternalDTXReplacedSafe(bool* internalDTXReplaced) {
+WebRtc_Word32 ACMG729::IsInternalDTXReplacedSafe(bool* internal_dtx_replaced) {
   // Get status of wether DTX is replaced or not
-  *internalDTXReplaced = !_hasInternalDTX;
+  *internal_dtx_replaced = !has_internal_dtx_;
   return 0;
 }
 
-WebRtc_Word16 ACMG729::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                  WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMG729::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                  WebRtc_Word16 /* bitstream_len_byte */,
                                   WebRtc_Word16* /* audio */,
-                                  WebRtc_Word16* /* audioSamples */,
-                                  WebRtc_Word8* /* speechType */) {
+                                  WebRtc_Word16* /* audio_samples */,
+                                  WebRtc_Word8* /* speech_type */) {
   // This function is not used. G.729 decoder is called from inside NetEQ
   return 0;
 }
 
-WebRtc_Word16 ACMG729::InternalInitEncoder(WebRtcACMCodecParams* codecParams) {
+WebRtc_Word16 ACMG729::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
   // Init G.729 encoder
-  return WebRtcG729_EncoderInit(_encoderInstPtr,
-                                ((codecParams->enableDTX) ? 1 : 0));
+  return WebRtcG729_EncoderInit(encoder_inst_ptr_,
+                                ((codec_params->enable_dtx) ? 1 : 0));
 }
 
 WebRtc_Word16 ACMG729::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   // Init G.729 decoder
-  return WebRtcG729_DecoderInit(_decoderInstPtr);
+  return WebRtcG729_DecoderInit(decoder_inst_ptr_);
 }
 
-WebRtc_Word32 ACMG729::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
+WebRtc_Word32 ACMG729::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
     // Todo:
     // log error
     return -1;
@@ -307,9 +309,9 @@
   // "SET_CODEC_PAR" & "SET_G729_FUNCTION."
   // Then call NetEQ to add the codec to it's
   // database.
-  SET_CODEC_PAR((codecDef), kDecoderG729, codecInst.pltype, _decoderInstPtr,
+  SET_CODEC_PAR((codec_def), kDecoderG729, codec_inst.pltype, decoder_inst_ptr_,
                 8000);
-  SET_G729_FUNCTIONS((codecDef));
+  SET_G729_FUNCTIONS((codec_def));
   return 0;
 }
 
@@ -320,37 +322,37 @@
 
 WebRtc_Word16 ACMG729::InternalCreateEncoder() {
   // Create encoder memory
-  return WebRtcG729_CreateEnc(&_encoderInstPtr);
+  return WebRtcG729_CreateEnc(&encoder_inst_ptr_);
 }
 
 void ACMG729::DestructEncoderSafe() {
   // Free encoder memory
-  _encoderExist = false;
-  _encoderInitialized = false;
-  if (_encoderInstPtr != NULL) {
-    WebRtcG729_FreeEnc(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcG729_FreeEnc(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
 }
 
 WebRtc_Word16 ACMG729::InternalCreateDecoder() {
   // Create decoder memory
-  return WebRtcG729_CreateDec(&_decoderInstPtr);
+  return WebRtcG729_CreateDec(&decoder_inst_ptr_);
 }
 
 void ACMG729::DestructDecoderSafe() {
   // Free decoder memory
-  _decoderExist = false;
-  _decoderInitialized = false;
-  if (_decoderInstPtr != NULL) {
-    WebRtcG729_FreeDec(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  decoder_exist_ = false;
+  decoder_initialized_ = false;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcG729_FreeDec(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
 }
 
-void ACMG729::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    WebRtcG729_FreeEnc((G729_encinst_t_*) ptrInst);
+void ACMG729::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    WebRtcG729_FreeEnc((G729_encinst_t_*) ptr_inst);
   }
   return;
 }
diff --git a/webrtc/modules/audio_coding/main/source/acm_g729.h b/webrtc/modules/audio_coding/main/source/acm_g729.h
index 5d8d4a8..e923a32 100644
--- a/webrtc/modules/audio_coding/main/source/acm_g729.h
+++ b/webrtc/modules/audio_coding/main/source/acm_g729.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G729_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G729_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 // forward declaration
 struct G729_encinst_t_;
@@ -21,27 +21,28 @@
 
 class ACMG729 : public ACMGenericCodec {
  public:
-  ACMG729(WebRtc_Word16 codecID);
+  explicit ACMG729(WebRtc_Word16 codec_id);
   ~ACMG729();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
                            WebRtc_Word16* audio,
-                           WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+                           WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -51,18 +52,18 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   WebRtc_Word16 EnableDTX();
 
   WebRtc_Word16 DisableDTX();
 
-  WebRtc_Word32 ReplaceInternalDTXSafe(const bool replaceInternalDTX);
+  WebRtc_Word32 ReplaceInternalDTXSafe(const bool replace_internal_dtx);
 
-  WebRtc_Word32 IsInternalDTXReplacedSafe(bool* internalDTXReplaced);
+  WebRtc_Word32 IsInternalDTXReplacedSafe(bool* internal_dtx_replaced);
 
-  G729_encinst_t_* _encoderInstPtr;
-  G729_decinst_t_* _decoderInstPtr;
+  G729_encinst_t_* encoder_inst_ptr_;
+  G729_decinst_t_* decoder_inst_ptr_;
 
 };
 
diff --git a/webrtc/modules/audio_coding/main/source/acm_g7291.cc b/webrtc/modules/audio_coding/main/source/acm_g7291.cc
index 0726dec..89c984a 100644
--- a/webrtc/modules/audio_coding/main/source/acm_g7291.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_g7291.cc
@@ -8,30 +8,30 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_g7291.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_g7291.h"
 
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 #ifdef WEBRTC_CODEC_G729_1
 // NOTE! G.729.1 is not included in the open-source package. Modify this file
 // or your codec API to match the function calls and names of used G.729.1 API
 // file.
-    #include "g7291_interface.h"
+#include "g7291_interface.h"
 #endif
 
 namespace webrtc {
 
 #ifndef WEBRTC_CODEC_G729_1
 
-ACMG729_1::ACMG729_1(WebRtc_Word16 /* codecID */)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL),
-      _myRate(32000),
-      _flag8kHz(0),
-      _flagG729mode(0) {
+ACMG729_1::ACMG729_1(WebRtc_Word16 /* codec_id */)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL),
+      my_rate_(32000),
+      flag_8khz_(0),
+      flag_g729_mode_(0) {
   return;
 }
 
@@ -39,31 +39,32 @@
   return;
 }
 
-WebRtc_Word16 ACMG729_1::InternalEncode(WebRtc_UWord8* /* bitStream */,
-                                        WebRtc_Word16* /* bitStreamLenByte */) {
+WebRtc_Word16 ACMG729_1::InternalEncode(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
-WebRtc_Word16 ACMG729_1::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                    WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMG729_1::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                    WebRtc_Word16 /* bitstream_len_byte */,
                                     WebRtc_Word16* /* audio */,
-                                    WebRtc_Word16* /* audioSamples */,
-                                    WebRtc_Word8* /* speechType */) {
+                                    WebRtc_Word16* /* audio_samples */,
+                                    WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
 WebRtc_Word16 ACMG729_1::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMG729_1::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-WebRtc_Word32 ACMG729_1::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef */,
-                                  const CodecInst& /* codecInst */) {
+WebRtc_Word32 ACMG729_1::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def */,
+                                  const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -87,7 +88,7 @@
   return;
 }
 
-void ACMG729_1::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMG729_1::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
@@ -99,113 +100,114 @@
 
 struct G729_1_inst_t_;
 
-ACMG729_1::ACMG729_1(WebRtc_Word16 codecID)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL),
-      _myRate(32000),  // Default rate.
-      _flag8kHz(0),
-      _flagG729mode(0) {
-  // TODO(tlegrand): We should add codecID as a input variable to the
+ACMG729_1::ACMG729_1(WebRtc_Word16 codec_id)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL),
+      my_rate_(32000),  // Default rate.
+      flag_8khz_(0),
+      flag_g729_mode_(0) {
+  // TODO(tlegrand): We should add codec_id as a input variable to the
   // constructor of ACMGenericCodec.
-  _codecID = codecID;
+  codec_id_ = codec_id;
   return;
 }
 
 ACMG729_1::~ACMG729_1() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcG7291_Free(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcG7291_Free(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
-  if (_decoderInstPtr != NULL) {
-    WebRtcG7291_Free(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcG7291_Free(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
   return;
 }
 
-WebRtc_Word16 ACMG729_1::InternalEncode(WebRtc_UWord8* bitStream,
-                                        WebRtc_Word16* bitStreamLenByte) {
+WebRtc_Word16 ACMG729_1::InternalEncode(WebRtc_UWord8* bitstream,
+                                        WebRtc_Word16* bitstream_len_byte) {
 
   // Initialize before entering the loop
-  WebRtc_Word16 noEncodedSamples = 0;
-  *bitStreamLenByte = 0;
+  WebRtc_Word16 num_encoded_samples = 0;
+  *bitstream_len_byte = 0;
 
-  WebRtc_Word16 byteLengthFrame = 0;
+  WebRtc_Word16 byte_length_frame = 0;
 
   // Derive number of 20ms frames per encoded packet.
   // [1,2,3] <=> [20,40,60]ms <=> [320,640,960] samples
-  WebRtc_Word16 n20msFrames = (_frameLenSmpl / 320);
+  WebRtc_Word16 num_20ms_frames = (frame_len_smpl_ / 320);
   // Byte length for the frame. +1 is for rate information.
-  byteLengthFrame = _myRate / (8 * 50) * n20msFrames + (1 - _flagG729mode);
+  byte_length_frame = my_rate_ / (8 * 50) * num_20ms_frames + (1 -
+      flag_g729_mode_);
 
   // The following might be revised if we have G729.1 Annex C (support for DTX);
   do {
-    *bitStreamLenByte = WebRtcG7291_Encode(_encoderInstPtr,
-                                           &_inAudio[_inAudioIxRead],
-                                           (WebRtc_Word16*) bitStream, _myRate,
-                                           n20msFrames);
+    *bitstream_len_byte = WebRtcG7291_Encode(encoder_inst_ptr_,
+                                             &in_audio_[in_audio_ix_read_],
+                                             (WebRtc_Word16*) bitstream,
+                                             my_rate_, num_20ms_frames);
 
     // increment the read index this tell the caller that how far
     // we have gone forward in reading the audio buffer
-    _inAudioIxRead += 160;
+    in_audio_ix_read_ += 160;
 
     // sanity check
-    if (*bitStreamLenByte < 0) {
+    if (*bitstream_len_byte < 0) {
       // error has happened
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "InternalEncode: Encode error for G729_1");
-      *bitStreamLenByte = 0;
+      *bitstream_len_byte = 0;
       return -1;
     }
 
-    noEncodedSamples += 160;
-  } while (*bitStreamLenByte == 0);
+    num_encoded_samples += 160;
+  } while (*bitstream_len_byte == 0);
 
   // This criteria will change if we have Annex C.
-  if (*bitStreamLenByte != byteLengthFrame) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  if (*bitstream_len_byte != byte_length_frame) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalEncode: Encode error for G729_1");
-    *bitStreamLenByte = 0;
+    *bitstream_len_byte = 0;
     return -1;
   }
 
-  if (noEncodedSamples != _frameLenSmpl) {
-    *bitStreamLenByte = 0;
+  if (num_encoded_samples != frame_len_smpl_) {
+    *bitstream_len_byte = 0;
     return -1;
   }
 
-  return *bitStreamLenByte;
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMG729_1::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                    WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMG729_1::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                    WebRtc_Word16 /* bitstream_len_byte */,
                                     WebRtc_Word16* /* audio */,
-                                    WebRtc_Word16* /* audioSamples */,
-                                    WebRtc_Word8* /* speechType */) {
+                                    WebRtc_Word16* /* audio_samples */,
+                                    WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
 WebRtc_Word16 ACMG729_1::InternalInitEncoder(
-    WebRtcACMCodecParams* codecParams) {
+    WebRtcACMCodecParams* codec_params) {
   //set the bit rate and initialize
-  _myRate = codecParams->codecInstant.rate;
-  return SetBitRateSafe((WebRtc_UWord32) _myRate);
+  my_rate_ = codec_params->codec_inst.rate;
+  return SetBitRateSafe((WebRtc_UWord32) my_rate_);
 }
 
 WebRtc_Word16 ACMG729_1::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
-  if (WebRtcG7291_DecoderInit(_decoderInstPtr) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WebRtcACMCodecParams* /* codec_params */) {
+  if (WebRtcG7291_DecoderInit(decoder_inst_ptr_) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalInitDecoder: init decoder failed for G729_1");
     return -1;
   }
   return 0;
 }
 
-WebRtc_Word32 ACMG729_1::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                  const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+WebRtc_Word32 ACMG729_1::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                  const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "CodeDef: Decoder uninitialized for G729_1");
     return -1;
   }
@@ -214,9 +216,9 @@
   // "SET_CODEC_PAR" & "SET_G729_FUNCTION."
   // Then call NetEQ to add the codec to it's
   // database.
-  SET_CODEC_PAR((codecDef), kDecoderG729_1, codecInst.pltype, _decoderInstPtr,
-                16000);
-  SET_G729_1_FUNCTIONS((codecDef));
+  SET_CODEC_PAR((codec_def), kDecoderG729_1, codec_inst.pltype,
+                decoder_inst_ptr_, 16000);
+  SET_G729_1_FUNCTIONS((codec_def));
   return 0;
 }
 
@@ -225,8 +227,8 @@
 }
 
 WebRtc_Word16 ACMG729_1::InternalCreateEncoder() {
-  if (WebRtcG7291_Create(&_encoderInstPtr) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  if (WebRtcG7291_Create(&encoder_inst_ptr_) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalCreateEncoder: create encoder failed for G729_1");
     return -1;
   }
@@ -234,17 +236,17 @@
 }
 
 void ACMG729_1::DestructEncoderSafe() {
-  _encoderExist = false;
-  _encoderInitialized = false;
-  if (_encoderInstPtr != NULL) {
-    WebRtcG7291_Free(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcG7291_Free(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
 }
 
 WebRtc_Word16 ACMG729_1::InternalCreateDecoder() {
-  if (WebRtcG7291_Create(&_decoderInstPtr) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  if (WebRtcG7291_Create(&decoder_inst_ptr_) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalCreateDecoder: create decoder failed for G729_1");
     return -1;
   }
@@ -252,86 +254,86 @@
 }
 
 void ACMG729_1::DestructDecoderSafe() {
-  _decoderExist = false;
-  _decoderInitialized = false;
-  if (_decoderInstPtr != NULL) {
-    WebRtcG7291_Free(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  decoder_exist_ = false;
+  decoder_initialized_ = false;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcG7291_Free(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
 }
 
-void ACMG729_1::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    //WebRtcG7291_Free((G729_1_inst_t*)ptrInst);
+void ACMG729_1::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    // WebRtcG7291_Free((G729_1_inst_t*)ptrInst);
   }
   return;
 }
 
 WebRtc_Word16 ACMG729_1::SetBitRateSafe(const WebRtc_Word32 rate) {
-  //allowed rates: { 8000, 12000, 14000, 16000, 18000, 20000,
+  // allowed rates: { 8000, 12000, 14000, 16000, 18000, 20000,
   //                22000, 24000, 26000, 28000, 30000, 32000};
   // TODO(tlegrand): This check exists in one other place two. Should be
   // possible to reuse code.
   switch (rate) {
     case 8000: {
-      _myRate = 8000;
+      my_rate_ = 8000;
       break;
     }
     case 12000: {
-      _myRate = 12000;
+      my_rate_ = 12000;
       break;
     }
     case 14000: {
-      _myRate = 14000;
+      my_rate_ = 14000;
       break;
     }
     case 16000: {
-      _myRate = 16000;
+      my_rate_ = 16000;
       break;
     }
     case 18000: {
-      _myRate = 18000;
+      my_rate_ = 18000;
       break;
     }
     case 20000: {
-      _myRate = 20000;
+      my_rate_ = 20000;
       break;
     }
     case 22000: {
-      _myRate = 22000;
+      my_rate_ = 22000;
       break;
     }
     case 24000: {
-      _myRate = 24000;
+      my_rate_ = 24000;
       break;
     }
     case 26000: {
-      _myRate = 26000;
+      my_rate_ = 26000;
       break;
     }
     case 28000: {
-      _myRate = 28000;
+      my_rate_ = 28000;
       break;
     }
     case 30000: {
-      _myRate = 30000;
+      my_rate_ = 30000;
       break;
     }
     case 32000: {
-      _myRate = 32000;
+      my_rate_ = 32000;
       break;
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "SetBitRateSafe: Invalid rate G729_1");
       return -1;
     }
   }
 
   // Re-init with new rate
-  if (WebRtcG7291_EncoderInit(_encoderInstPtr, _myRate, _flag8kHz,
-                              _flagG729mode) >= 0) {
-    _encoderParams.codecInstant.rate = _myRate;
+  if (WebRtcG7291_EncoderInit(encoder_inst_ptr_, my_rate_, flag_8khz_,
+                              flag_g729_mode_) >= 0) {
+    encoder_params_.codec_inst.rate = my_rate_;
     return 0;
   } else {
     return -1;
diff --git a/webrtc/modules/audio_coding/main/source/acm_g7291.h b/webrtc/modules/audio_coding/main/source/acm_g7291.h
index 35f07ff..d55c51b 100644
--- a/webrtc/modules/audio_coding/main/source/acm_g7291.h
+++ b/webrtc/modules/audio_coding/main/source/acm_g7291.h
@@ -8,10 +8,10 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G729_1_H_
-#define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G729_1_H_
+#ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G7291_H_
+#define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G7291_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 // forward declaration
 struct G729_1_inst_t_;
@@ -21,27 +21,28 @@
 
 class ACMG729_1 : public ACMGenericCodec {
  public:
-  ACMG729_1(WebRtc_Word16 codecID);
+  explicit ACMG729_1(WebRtc_Word16 codec_id);
   ~ACMG729_1();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
                            WebRtc_Word16* audio,
-                           WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+                           WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -51,18 +52,18 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   WebRtc_Word16 SetBitRateSafe(const WebRtc_Word32 rate);
 
-  G729_1_inst_t_* _encoderInstPtr;
-  G729_1_inst_t_* _decoderInstPtr;
+  G729_1_inst_t_* encoder_inst_ptr_;
+  G729_1_inst_t_* decoder_inst_ptr_;
 
-  WebRtc_UWord16 _myRate;
-  WebRtc_Word16 _flag8kHz;
-  WebRtc_Word16 _flagG729mode;
+  WebRtc_UWord16 my_rate_;
+  WebRtc_Word16 flag_8khz_;
+  WebRtc_Word16 flag_g729_mode_;
 };
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G729_1_H_
+#endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_G7291_H_
diff --git a/webrtc/modules/audio_coding/main/source/acm_generic_codec.cc b/webrtc/modules/audio_coding/main/source/acm_generic_codec.cc
index c39edcd..7d84658 100644
--- a/webrtc/modules/audio_coding/main/source/acm_generic_codec.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_generic_codec.cc
@@ -8,16 +8,17 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
+
 #include <assert.h>
 #include <string.h>
 
-#include "acm_codec_database.h"
-#include "acm_common_defs.h"
-#include "acm_generic_codec.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_vad.h"
-#include "webrtc_cng.h"
+#include "webrtc/common_audio/vad/include/webrtc_vad.h"
+#include "webrtc/modules/audio_coding/codecs/cng/include/webrtc_cng.h"
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 namespace webrtc {
 
@@ -36,285 +37,289 @@
 // if a proper initialization has happened. Another approach is
 // to initialize to a default codec that we are sure is always included.
 ACMGenericCodec::ACMGenericCodec()
-    : _inAudioIxWrite(0),
-      _inAudioIxRead(0),
-      _inTimestampIxWrite(0),
-      _inAudio(NULL),
-      _inTimestamp(NULL),
-      _frameLenSmpl(-1),  // invalid value
-      _noChannels(1),
-      _codecID(-1),  // invalid value
-      _noMissedSamples(0),
-      _encoderExist(false),
-      _decoderExist(false),
-      _encoderInitialized(false),
-      _decoderInitialized(false),
-      _registeredInNetEq(false),
-      _hasInternalDTX(false),
-      _ptrVADInst(NULL),
-      _vadEnabled(false),
-      _vadMode(VADNormal),
-      _dtxEnabled(false),
-      _ptrDTXInst(NULL),
-      _numLPCParams(kNewCNGNumPLCParams),
-      _sentCNPrevious(false),
-      _isMaster(true),
-      _prev_frame_cng(0),
-      _netEqDecodeLock(NULL),
-      _codecWrapperLock(*RWLockWrapper::CreateRWLock()),
-      _lastEncodedTimestamp(0),
-      _lastTimestamp(0xD87F3F9F),
-      _isAudioBuffFresh(true),
-      _uniqueID(0) {
+    : in_audio_ix_write_(0),
+      in_audio_ix_read_(0),
+      in_timestamp_ix_write_(0),
+      in_audio_(NULL),
+      in_timestamp_(NULL),
+      frame_len_smpl_(-1),  // invalid value
+      num_channels_(1),
+      codec_id_(-1),  // invalid value
+      num_missed_samples_(0),
+      encoder_exist_(false),
+      decoder_exist_(false),
+      encoder_initialized_(false),
+      decoder_initialized_(false),
+      registered_in_neteq_(false),
+      has_internal_dtx_(false),
+      ptr_vad_inst_(NULL),
+      vad_enabled_(false),
+      vad_mode_(VADNormal),
+      dtx_enabled_(false),
+      ptr_dtx_inst_(NULL),
+      num_lpc_params_(kNewCNGNumPLCParams),
+      sent_cn_previous_(false),
+      is_master_(true),
+      prev_frame_cng_(0),
+      neteq_decode_lock_(NULL),
+      codec_wrapper_lock_(*RWLockWrapper::CreateRWLock()),
+      last_encoded_timestamp_(0),
+      last_timestamp_(0xD87F3F9F),
+      is_audio_buff_fresh_(true),
+      unique_id_(0) {
   // Initialize VAD vector.
   for (int i = 0; i < MAX_FRAME_SIZE_10MSEC; i++) {
-    _vadLabel[i] = 0;
+    vad_label_[i] = 0;
   }
   // Nullify memory for encoder and decoder, and set payload type to an
   // invalid value.
-  memset(&_encoderParams, 0, sizeof(WebRtcACMCodecParams));
-  _encoderParams.codecInstant.pltype = -1;
-  memset(&_decoderParams, 0, sizeof(WebRtcACMCodecParams));
-  _decoderParams.codecInstant.pltype = -1;
+  memset(&encoder_params_, 0, sizeof(WebRtcACMCodecParams));
+  encoder_params_.codec_inst.pltype = -1;
+  memset(&decoder_params_, 0, sizeof(WebRtcACMCodecParams));
+  decoder_params_.codec_inst.pltype = -1;
 }
 
 ACMGenericCodec::~ACMGenericCodec() {
   // Check all the members which are pointers, and if they are not NULL
   // delete/free them.
-  if (_ptrVADInst != NULL) {
-    WebRtcVad_Free(_ptrVADInst);
-    _ptrVADInst = NULL;
+  if (ptr_vad_inst_ != NULL) {
+    WebRtcVad_Free(ptr_vad_inst_);
+    ptr_vad_inst_ = NULL;
   }
-  if (_inAudio != NULL) {
-    delete[] _inAudio;
-    _inAudio = NULL;
+  if (in_audio_ != NULL) {
+    delete[] in_audio_;
+    in_audio_ = NULL;
   }
-  if (_inTimestamp != NULL) {
-    delete[] _inTimestamp;
-    _inTimestamp = NULL;
+  if (in_timestamp_ != NULL) {
+    delete[] in_timestamp_;
+    in_timestamp_ = NULL;
   }
-  if (_ptrDTXInst != NULL) {
-    WebRtcCng_FreeEnc(_ptrDTXInst);
-    _ptrDTXInst = NULL;
+  if (ptr_dtx_inst_ != NULL) {
+    WebRtcCng_FreeEnc(ptr_dtx_inst_);
+    ptr_dtx_inst_ = NULL;
   }
-  delete &_codecWrapperLock;
+  delete &codec_wrapper_lock_;
 }
 
 int32_t ACMGenericCodec::Add10MsData(const uint32_t timestamp,
                                      const int16_t* data,
-                                     const uint16_t lengthSmpl,
-                                     const uint8_t audioChannel) {
-  WriteLockScoped wl(_codecWrapperLock);
-  return Add10MsDataSafe(timestamp, data, lengthSmpl, audioChannel);
+                                     const uint16_t length_smpl,
+                                     const uint8_t audio_channel) {
+  WriteLockScoped wl(codec_wrapper_lock_);
+  return Add10MsDataSafe(timestamp, data, length_smpl, audio_channel);
 }
 
 int32_t ACMGenericCodec::Add10MsDataSafe(const uint32_t timestamp,
                                          const int16_t* data,
-                                         const uint16_t lengthSmpl,
-                                         const uint8_t audioChannel) {
+                                         const uint16_t length_smpl,
+                                         const uint8_t audio_channel) {
   // The codec expects to get data in correct sampling rate. Get the sampling
   // frequency of the codec.
-  uint16_t plFreqHz;
-  if (EncoderSampFreq(plFreqHz) < 0) {
-    // _codecID is not correct, perhaps the codec is not initialized yet.
+  uint16_t plfreq_hz;
+  if (EncoderSampFreq(plfreq_hz) < 0) {
     return -1;
   }
 
   // Sanity check to make sure the length of the input corresponds to 10 ms.
-  if ((plFreqHz / 100) != lengthSmpl) {
+  if ((plfreq_hz / 100) != length_smpl) {
     // This is not 10 ms of audio, given the sampling frequency of the codec.
     return -1;
   }
 
-  if (_lastTimestamp == timestamp) {
+  if (last_timestamp_ == timestamp) {
     // Same timestamp as the last time, overwrite.
-    if ((_inAudioIxWrite >= lengthSmpl * audioChannel) &&
-        (_inTimestampIxWrite > 0)) {
-      _inAudioIxWrite -= lengthSmpl * audioChannel;
-      _inTimestampIxWrite--;
-      WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, _uniqueID,
-          "Adding 10ms with previous timestamp, overwriting the previous 10ms");
+    if ((in_audio_ix_write_ >= length_smpl * audio_channel) &&
+        (in_timestamp_ix_write_ > 0)) {
+      in_audio_ix_write_ -= length_smpl * audio_channel;
+      in_timestamp_ix_write_--;
+      WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, unique_id_,
+                   "Adding 10ms with previous timestamp, overwriting the "
+                   "previous 10ms");
     } else {
-      WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, unique_id_,
                    "Adding 10ms with previous timestamp, this will sound bad");
     }
   }
 
-  _lastTimestamp = timestamp;
+  last_timestamp_ = timestamp;
 
   // If the data exceeds the buffer size, we throw away the oldest data and
   // add the newly received 10 msec at the end.
-  if ((_inAudioIxWrite + lengthSmpl * audioChannel) > AUDIO_BUFFER_SIZE_W16) {
+  if ((in_audio_ix_write_ + length_smpl * audio_channel) >
+      AUDIO_BUFFER_SIZE_W16) {
     // Get the number of samples to be overwritten.
-    int16_t missedSamples = _inAudioIxWrite + lengthSmpl * audioChannel -
+    int16_t missed_samples = in_audio_ix_write_ + length_smpl * audio_channel -
         AUDIO_BUFFER_SIZE_W16;
 
     // Move the data (overwrite the old data).
-    memmove(_inAudio, _inAudio + missedSamples,
-            (AUDIO_BUFFER_SIZE_W16 - lengthSmpl * audioChannel) *
+    memmove(in_audio_, in_audio_ + missed_samples,
+            (AUDIO_BUFFER_SIZE_W16 - length_smpl * audio_channel) *
             sizeof(int16_t));
 
     // Copy the new data.
-    memcpy(_inAudio + (AUDIO_BUFFER_SIZE_W16 - lengthSmpl * audioChannel), data,
-           lengthSmpl * audioChannel * sizeof(int16_t));
+    memcpy(in_audio_ + (AUDIO_BUFFER_SIZE_W16 - length_smpl * audio_channel),
+           data, length_smpl * audio_channel * sizeof(int16_t));
 
     // Get the number of 10 ms blocks which are overwritten.
-    int16_t missed10MsecBlocks =static_cast<int16_t>(
-        (missedSamples / audioChannel * 100) / plFreqHz);
+    int16_t missed_10ms_blocks =static_cast<int16_t>(
+        (missed_samples / audio_channel * 100) / plfreq_hz);
 
     // Move the timestamps.
-    memmove(_inTimestamp, _inTimestamp + missed10MsecBlocks,
-            (_inTimestampIxWrite - missed10MsecBlocks) * sizeof(uint32_t));
-    _inTimestampIxWrite -= missed10MsecBlocks;
-    _inTimestamp[_inTimestampIxWrite] = timestamp;
-    _inTimestampIxWrite++;
+    memmove(in_timestamp_, in_timestamp_ + missed_10ms_blocks,
+            (in_timestamp_ix_write_ - missed_10ms_blocks) * sizeof(uint32_t));
+    in_timestamp_ix_write_ -= missed_10ms_blocks;
+    in_timestamp_[in_timestamp_ix_write_] = timestamp;
+    in_timestamp_ix_write_++;
 
     // Buffer is full.
-    _inAudioIxWrite = AUDIO_BUFFER_SIZE_W16;
-    IncreaseNoMissedSamples(missedSamples);
-    _isAudioBuffFresh = false;
-    return -missedSamples;
+    in_audio_ix_write_ = AUDIO_BUFFER_SIZE_W16;
+    IncreaseNoMissedSamples(missed_samples);
+    is_audio_buff_fresh_ = false;
+    return -missed_samples;
   }
 
   // Store the input data in our data buffer.
-  memcpy(_inAudio + _inAudioIxWrite, data,
-         lengthSmpl * audioChannel * sizeof(int16_t));
-  _inAudioIxWrite += lengthSmpl * audioChannel;
+  memcpy(in_audio_ + in_audio_ix_write_, data,
+         length_smpl * audio_channel * sizeof(int16_t));
+  in_audio_ix_write_ += length_smpl * audio_channel;
 
-  assert(_inTimestampIxWrite < TIMESTAMP_BUFFER_SIZE_W32);
-  assert(_inTimestampIxWrite >= 0);
+  assert(in_timestamp_ix_write_ < TIMESTAMP_BUFFER_SIZE_W32);
+  assert(in_timestamp_ix_write_ >= 0);
 
-  _inTimestamp[_inTimestampIxWrite] = timestamp;
-  _inTimestampIxWrite++;
-  _isAudioBuffFresh = false;
+  in_timestamp_[in_timestamp_ix_write_] = timestamp;
+  in_timestamp_ix_write_++;
+  is_audio_buff_fresh_ = false;
   return 0;
 }
 
 bool ACMGenericCodec::HasFrameToEncode() const {
-  ReadLockScoped lockCodec(_codecWrapperLock);
-  if (_inAudioIxWrite < _frameLenSmpl * _noChannels)
+  ReadLockScoped lockCodec(codec_wrapper_lock_);
+  if (in_audio_ix_write_ < frame_len_smpl_ * num_channels_)
     return false;
   return true;
 }
 
-int16_t ACMGenericCodec::Encode(uint8_t* bitStream,
-                                int16_t* bitStreamLenByte,
-                                uint32_t* timeStamp,
-                                WebRtcACMEncodingType* encodingType) {
+int16_t ACMGenericCodec::Encode(uint8_t* bitstream,
+                                int16_t* bitstream_len_byte,
+                                uint32_t* timestamp,
+                                WebRtcACMEncodingType* encoding_type) {
   if (!HasFrameToEncode()) {
     // There is not enough audio
-    *timeStamp = 0;
-    *bitStreamLenByte = 0;
+    *timestamp = 0;
+    *bitstream_len_byte = 0;
     // Doesn't really matter what this parameter set to
-    *encodingType = kNoEncoding;
+    *encoding_type = kNoEncoding;
     return 0;
   }
-  WriteLockScoped lockCodec(_codecWrapperLock);
-  ReadLockScoped lockNetEq(*_netEqDecodeLock);
+  WriteLockScoped lockCodec(codec_wrapper_lock_);
+  ReadLockScoped lockNetEq(*neteq_decode_lock_);
 
   // Not all codecs accept the whole frame to be pushed into encoder at once.
   // Some codecs needs to be feed with a specific number of samples different
   // from the frame size. If this is the case, |myBasicCodingBlockSmpl| will
   // report a number different from 0, and we will loop over calls to encoder
   // further down, until we have encode a complete frame.
-  const int16_t myBasicCodingBlockSmpl = ACMCodecDB::BasicCodingBlock(_codecID);
-  if (myBasicCodingBlockSmpl < 0 || !_encoderInitialized || !_encoderExist) {
+  const int16_t my_basic_coding_block_smpl =
+      ACMCodecDB::BasicCodingBlock(codec_id_);
+  if (my_basic_coding_block_smpl < 0 || !encoder_initialized_ ||
+      !encoder_exist_) {
     // This should not happen, but in case it does, report no encoding done.
-    *timeStamp = 0;
-    *bitStreamLenByte = 0;
-    *encodingType = kNoEncoding;
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    *timestamp = 0;
+    *bitstream_len_byte = 0;
+    *encoding_type = kNoEncoding;
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "EncodeSafe: error, basic coding sample block is negative");
     return -1;
   }
   // This makes the internal encoder read from the beginning of the buffer.
-  _inAudioIxRead = 0;
-  *timeStamp = _inTimestamp[0];
+  in_audio_ix_read_ = 0;
+  *timestamp = in_timestamp_[0];
 
-  // Process the audio through VAD. The function will set |_vadLabels|.
-  // If VAD is disabled all entries in |_vadLabels| are set to ONE (active).
+  // Process the audio through VAD. The function will set |_vad_labels|.
+  // If VAD is disabled all entries in |_vad_labels| are set to ONE (active).
   int16_t status = 0;
-  int16_t dtxProcessedSamples = 0;
-  status = ProcessFrameVADDTX(bitStream, bitStreamLenByte,
-                              &dtxProcessedSamples);
+  int16_t dtx_processed_samples = 0;
+  status = ProcessFrameVADDTX(bitstream, bitstream_len_byte,
+                              &dtx_processed_samples);
   if (status < 0) {
-    *timeStamp = 0;
-    *bitStreamLenByte = 0;
-    *encodingType = kNoEncoding;
+    *timestamp = 0;
+    *bitstream_len_byte = 0;
+    *encoding_type = kNoEncoding;
   } else {
-    if (dtxProcessedSamples > 0) {
+    if (dtx_processed_samples > 0) {
       // Dtx have processed some samples, and even if a bit-stream is generated
       // we should not do any encoding (normally there won't be enough data).
 
       // Setting the following makes sure that the move of audio data and
       // timestamps done correctly.
-      _inAudioIxRead = dtxProcessedSamples;
+      in_audio_ix_read_ = dtx_processed_samples;
       // This will let the owner of ACMGenericCodec to know that the
       // generated bit-stream is DTX to use correct payload type.
-      uint16_t sampFreqHz;
-      EncoderSampFreq(sampFreqHz);
-      if (sampFreqHz == 8000) {
-        *encodingType = kPassiveDTXNB;
-      } else if (sampFreqHz == 16000) {
-        *encodingType = kPassiveDTXWB;
-      } else if (sampFreqHz == 32000) {
-        *encodingType = kPassiveDTXSWB;
-      } else if (sampFreqHz == 48000) {
-        *encodingType = kPassiveDTXFB;
+      uint16_t samp_freq_hz;
+      EncoderSampFreq(samp_freq_hz);
+      if (samp_freq_hz == 8000) {
+        *encoding_type = kPassiveDTXNB;
+      } else if (samp_freq_hz == 16000) {
+        *encoding_type = kPassiveDTXWB;
+      } else if (samp_freq_hz == 32000) {
+        *encoding_type = kPassiveDTXSWB;
+      } else if (samp_freq_hz == 48000) {
+        *encoding_type = kPassiveDTXFB;
       } else {
         status = -1;
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                      "EncodeSafe: Wrong sampling frequency for DTX.");
       }
 
       // Transport empty frame if we have an empty bitstream.
-      if ((*bitStreamLenByte == 0) &&
-          (_sentCNPrevious || ((_inAudioIxWrite - _inAudioIxRead) <= 0))) {
+      if ((*bitstream_len_byte == 0) &&
+          (sent_cn_previous_ ||
+          ((in_audio_ix_write_ - in_audio_ix_read_) <= 0))) {
         // Makes sure we transmit an empty frame.
-        *bitStreamLenByte = 1;
-        *encodingType = kNoEncoding;
+        *bitstream_len_byte = 1;
+        *encoding_type = kNoEncoding;
       }
-      _sentCNPrevious = true;
+      sent_cn_previous_ = true;
     } else {
       // We should encode the audio frame. Either VAD and/or DTX is off, or the
       // audio was considered "active".
 
-      _sentCNPrevious = false;
-      if (myBasicCodingBlockSmpl == 0) {
+      sent_cn_previous_ = false;
+      if (my_basic_coding_block_smpl == 0) {
         // This codec can handle all allowed frame sizes as basic coding block.
-        status = InternalEncode(bitStream, bitStreamLenByte);
+        status = InternalEncode(bitstream, bitstream_len_byte);
         if (status < 0) {
           // TODO(tlegrand): Maybe reseting the encoder to be fresh for the next
           // frame.
           WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding,
-                       _uniqueID, "EncodeSafe: error in internalEncode");
-          *bitStreamLenByte = 0;
-          *encodingType = kNoEncoding;
+                       unique_id_, "EncodeSafe: error in internal_encode");
+          *bitstream_len_byte = 0;
+          *encoding_type = kNoEncoding;
         }
       } else {
         // A basic-coding-block for this codec is defined so we loop over the
         // audio with the steps of the basic-coding-block.
-        int16_t tmpBitStreamLenByte;
+        int16_t tmp_bitstream_len_byte;
 
         // Reset the variables which will be incremented in the loop.
-        *bitStreamLenByte = 0;
+        *bitstream_len_byte = 0;
         bool done = false;
         while (!done) {
-          status = InternalEncode(&bitStream[*bitStreamLenByte],
-                                  &tmpBitStreamLenByte);
-          *bitStreamLenByte += tmpBitStreamLenByte;
+          status = InternalEncode(&bitstream[*bitstream_len_byte],
+                                  &tmp_bitstream_len_byte);
+          *bitstream_len_byte += tmp_bitstream_len_byte;
 
           // Guard Against errors and too large payloads.
-          if ((status < 0) || (*bitStreamLenByte > MAX_PAYLOAD_SIZE_BYTE)) {
+          if ((status < 0) || (*bitstream_len_byte > MAX_PAYLOAD_SIZE_BYTE)) {
             // Error has happened, and even if we are in the middle of a full
             // frame we have to exit. Before exiting, whatever bits are in the
             // buffer are probably corrupted, so we ignore them.
-            *bitStreamLenByte = 0;
-            *encodingType = kNoEncoding;
+            *bitstream_len_byte = 0;
+            *encoding_type = kNoEncoding;
             // We might have come here because of the second condition.
             status = -1;
             WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding,
-                         _uniqueID, "EncodeSafe: error in InternalEncode");
+                         unique_id_, "EncodeSafe: error in InternalEncode");
             // break from the loop
             break;
           }
@@ -322,18 +327,18 @@
           // TODO(andrew): This should be multiplied by the number of
           //               channels, right?
           // http://code.google.com/p/webrtc/issues/detail?id=714
-          done = _inAudioIxRead >= _frameLenSmpl;
+          done = in_audio_ix_read_ >= frame_len_smpl_;
         }
       }
       if (status >= 0) {
-        *encodingType = (_vadLabel[0] == 1) ? kActiveNormalEncoded :
+        *encoding_type = (vad_label_[0] == 1) ? kActiveNormalEncoded :
             kPassiveNormalEncoded;
         // Transport empty frame if we have an empty bitstream.
-        if ((*bitStreamLenByte == 0) &&
-            ((_inAudioIxWrite - _inAudioIxRead) <= 0)) {
+        if ((*bitstream_len_byte == 0) &&
+            ((in_audio_ix_write_ - in_audio_ix_read_) <= 0)) {
           // Makes sure we transmit an empty frame.
-          *bitStreamLenByte = 1;
-          *encodingType = kNoEncoding;
+          *bitstream_len_byte = 1;
+          *encoding_type = kNoEncoding;
         }
       }
     }
@@ -341,148 +346,148 @@
 
   // Move the timestamp buffer according to the number of 10 ms blocks
   // which are read.
-  uint16_t sampFreqHz;
-  EncoderSampFreq(sampFreqHz);
-  int16_t num10MsecBlocks = static_cast<int16_t>(
-      (_inAudioIxRead / _noChannels * 100) / sampFreqHz);
-  if (_inTimestampIxWrite > num10MsecBlocks) {
-    memmove(_inTimestamp, _inTimestamp + num10MsecBlocks,
-            (_inTimestampIxWrite - num10MsecBlocks) * sizeof(int32_t));
+  uint16_t samp_freq_hz;
+  EncoderSampFreq(samp_freq_hz);
+  int16_t num_10ms_blocks = static_cast<int16_t>(
+      (in_audio_ix_read_ / num_channels_ * 100) / samp_freq_hz);
+  if (in_timestamp_ix_write_ > num_10ms_blocks) {
+    memmove(in_timestamp_, in_timestamp_ + num_10ms_blocks,
+            (in_timestamp_ix_write_ - num_10ms_blocks) * sizeof(int32_t));
   }
-  _inTimestampIxWrite -= num10MsecBlocks;
+  in_timestamp_ix_write_ -= num_10ms_blocks;
 
   // Remove encoded audio and move next audio to be encoded to the beginning
   // of the buffer. Accordingly, adjust the read and write indices.
-  if (_inAudioIxRead < _inAudioIxWrite) {
-    memmove(_inAudio, &_inAudio[_inAudioIxRead],
-            (_inAudioIxWrite - _inAudioIxRead) * sizeof(int16_t));
+  if (in_audio_ix_read_ < in_audio_ix_write_) {
+    memmove(in_audio_, &in_audio_[in_audio_ix_read_],
+            (in_audio_ix_write_ - in_audio_ix_read_) * sizeof(int16_t));
   }
-  _inAudioIxWrite -= _inAudioIxRead;
-  _inAudioIxRead = 0;
-  _lastEncodedTimestamp = *timeStamp;
-  return (status < 0) ? (-1) : (*bitStreamLenByte);
+  in_audio_ix_write_ -= in_audio_ix_read_;
+  in_audio_ix_read_ = 0;
+  last_encoded_timestamp_ = *timestamp;
+  return (status < 0) ? (-1) : (*bitstream_len_byte);
 }
 
-int16_t ACMGenericCodec::Decode(uint8_t* bitStream,
-                                int16_t bitStreamLenByte,
+int16_t ACMGenericCodec::Decode(uint8_t* bitstream,
+                                int16_t bitstream_len_byte,
                                 int16_t* audio,
-                                int16_t* audioSamples,
-                                int8_t* speechType) {
-  WriteLockScoped wl(_codecWrapperLock);
-  return DecodeSafe(bitStream, bitStreamLenByte, audio, audioSamples,
-                    speechType);
+                                int16_t* audio_samples,
+                                int8_t* speech_type) {
+  WriteLockScoped wl(codec_wrapper_lock_);
+  return DecodeSafe(bitstream, bitstream_len_byte, audio, audio_samples,
+                    speech_type);
 }
 
 bool ACMGenericCodec::EncoderInitialized() {
-  ReadLockScoped rl(_codecWrapperLock);
-  return _encoderInitialized;
+  ReadLockScoped rl(codec_wrapper_lock_);
+  return encoder_initialized_;
 }
 
 bool ACMGenericCodec::DecoderInitialized() {
-  ReadLockScoped rl(_codecWrapperLock);
-  return _decoderInitialized;
+  ReadLockScoped rl(codec_wrapper_lock_);
+  return decoder_initialized_;
 }
 
-int32_t ACMGenericCodec::RegisterInNetEq(ACMNetEQ* netEq,
-                                         const CodecInst& codecInst) {
-  WebRtcNetEQ_CodecDef codecDef;
-  WriteLockScoped wl(_codecWrapperLock);
+int32_t ACMGenericCodec::RegisterInNetEq(ACMNetEQ* neteq,
+                                         const CodecInst& codec_inst) {
+  WebRtcNetEQ_CodecDef codec_def;
+  WriteLockScoped wl(codec_wrapper_lock_);
 
-  if (CodecDef(codecDef, codecInst) < 0) {
+  if (CodecDef(codec_def, codec_inst) < 0) {
     // Failed to register the decoder.
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "RegisterInNetEq: error, failed to register");
-    _registeredInNetEq = false;
+    registered_in_neteq_ = false;
     return -1;
   } else {
-    if (netEq->AddCodec(&codecDef, _isMaster) < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    if (neteq->AddCodec(&codec_def, is_master_) < 0) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "RegisterInNetEq: error, failed to add codec");
-      _registeredInNetEq = false;
+      registered_in_neteq_ = false;
       return -1;
     }
     // Succeeded registering the decoder.
-    _registeredInNetEq = true;
+    registered_in_neteq_ = true;
     return 0;
   }
 }
 
-int16_t ACMGenericCodec::EncoderParams(WebRtcACMCodecParams* encParams) {
-  ReadLockScoped rl(_codecWrapperLock);
-  return EncoderParamsSafe(encParams);
+int16_t ACMGenericCodec::EncoderParams(WebRtcACMCodecParams* enc_params) {
+  ReadLockScoped rl(codec_wrapper_lock_);
+  return EncoderParamsSafe(enc_params);
 }
 
-int16_t ACMGenericCodec::EncoderParamsSafe(WebRtcACMCodecParams* encParams) {
+int16_t ACMGenericCodec::EncoderParamsSafe(WebRtcACMCodecParams* enc_params) {
   // Codec parameters are valid only if the encoder is initialized.
-  if (_encoderInitialized) {
-    int32_t currentRate;
-    memcpy(encParams, &_encoderParams, sizeof(WebRtcACMCodecParams));
-    currentRate = encParams->codecInstant.rate;
-    CurrentRate(currentRate);
-    encParams->codecInstant.rate = currentRate;
+  if (encoder_initialized_) {
+    int32_t current_rate;
+    memcpy(enc_params, &encoder_params_, sizeof(WebRtcACMCodecParams));
+    current_rate = enc_params->codec_inst.rate;
+    CurrentRate(current_rate);
+    enc_params->codec_inst.rate = current_rate;
     return 0;
   } else {
-    encParams->codecInstant.plname[0] = '\0';
-    encParams->codecInstant.pltype = -1;
-    encParams->codecInstant.pacsize = 0;
-    encParams->codecInstant.rate = 0;
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    enc_params->codec_inst.plname[0] = '\0';
+    enc_params->codec_inst.pltype = -1;
+    enc_params->codec_inst.pacsize = 0;
+    enc_params->codec_inst.rate = 0;
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "EncoderParamsSafe: error, encoder not initialized");
     return -1;
   }
 }
 
-bool ACMGenericCodec::DecoderParams(WebRtcACMCodecParams* decParams,
-                                    const uint8_t payloadType) {
-  ReadLockScoped rl(_codecWrapperLock);
-  return DecoderParamsSafe(decParams, payloadType);
+bool ACMGenericCodec::DecoderParams(WebRtcACMCodecParams* dec_params,
+                                    const uint8_t payload_type) {
+  ReadLockScoped rl(codec_wrapper_lock_);
+  return DecoderParamsSafe(dec_params, payload_type);
 }
 
-bool ACMGenericCodec::DecoderParamsSafe(WebRtcACMCodecParams* decParams,
-                                        const uint8_t payloadType) {
+bool ACMGenericCodec::DecoderParamsSafe(WebRtcACMCodecParams* dec_params,
+                                        const uint8_t payload_type) {
   // Decoder parameters are valid only if decoder is initialized.
-  if (_decoderInitialized) {
-    if (payloadType == _decoderParams.codecInstant.pltype) {
-      memcpy(decParams, &_decoderParams, sizeof(WebRtcACMCodecParams));
+  if (decoder_initialized_) {
+    if (payload_type == decoder_params_.codec_inst.pltype) {
+      memcpy(dec_params, &decoder_params_, sizeof(WebRtcACMCodecParams));
       return true;
     }
   }
 
-  decParams->codecInstant.plname[0] = '\0';
-  decParams->codecInstant.pltype = -1;
-  decParams->codecInstant.pacsize = 0;
-  decParams->codecInstant.rate = 0;
+  dec_params->codec_inst.plname[0] = '\0';
+  dec_params->codec_inst.pltype = -1;
+  dec_params->codec_inst.pacsize = 0;
+  dec_params->codec_inst.rate = 0;
   return false;
 }
 
 int16_t ACMGenericCodec::ResetEncoder() {
-  WriteLockScoped lockCodec(_codecWrapperLock);
-  ReadLockScoped lockNetEq(*_netEqDecodeLock);
+  WriteLockScoped lockCodec(codec_wrapper_lock_);
+  ReadLockScoped lockNetEq(*neteq_decode_lock_);
   return ResetEncoderSafe();
 }
 
 int16_t ACMGenericCodec::ResetEncoderSafe() {
-  if (!_encoderExist || !_encoderInitialized) {
+  if (!encoder_exist_ || !encoder_initialized_) {
     // We don't reset if encoder doesn't exists or isn't initialized yet.
     return 0;
   }
 
-  _inAudioIxWrite = 0;
-  _inAudioIxRead = 0;
-  _inTimestampIxWrite = 0;
-  _noMissedSamples = 0;
-  _isAudioBuffFresh = true;
-  memset(_inAudio, 0, AUDIO_BUFFER_SIZE_W16 * sizeof(int16_t));
-  memset(_inTimestamp, 0, TIMESTAMP_BUFFER_SIZE_W32 * sizeof(int32_t));
+  in_audio_ix_write_ = 0;
+  in_audio_ix_read_ = 0;
+  in_timestamp_ix_write_ = 0;
+  num_missed_samples_ = 0;
+  is_audio_buff_fresh_ = true;
+  memset(in_audio_, 0, AUDIO_BUFFER_SIZE_W16 * sizeof(int16_t));
+  memset(in_timestamp_, 0, TIMESTAMP_BUFFER_SIZE_W32 * sizeof(int32_t));
 
   // Store DTX/VAD parameters.
-  bool enableVAD = _vadEnabled;
-  bool enableDTX = _dtxEnabled;
-  ACMVADMode mode = _vadMode;
+  bool enable_vad = vad_enabled_;
+  bool enable_dtx = dtx_enabled_;
+  ACMVADMode mode = vad_mode_;
 
   // Reset the encoder.
   if (InternalResetEncoder() < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "ResetEncoderSafe: error in reset encoder");
     return -1;
   }
@@ -492,243 +497,245 @@
   DisableVAD();
 
   // Set DTX/VAD.
-  return SetVADSafe(enableDTX, enableVAD, mode);
+  return SetVADSafe(enable_dtx, enable_vad, mode);
 }
 
 int16_t ACMGenericCodec::InternalResetEncoder() {
   // Call the codecs internal encoder initialization/reset function.
-  return InternalInitEncoder(&_encoderParams);
+  return InternalInitEncoder(&encoder_params_);
 }
 
-int16_t ACMGenericCodec::InitEncoder(WebRtcACMCodecParams* codecParams,
-                                     bool forceInitialization) {
-  WriteLockScoped lockCodec(_codecWrapperLock);
-  ReadLockScoped lockNetEq(*_netEqDecodeLock);
-  return InitEncoderSafe(codecParams, forceInitialization);
+int16_t ACMGenericCodec::InitEncoder(WebRtcACMCodecParams* codec_params,
+                                     bool force_initialization) {
+  WriteLockScoped lockCodec(codec_wrapper_lock_);
+  ReadLockScoped lockNetEq(*neteq_decode_lock_);
+  return InitEncoderSafe(codec_params, force_initialization);
 }
 
-int16_t ACMGenericCodec::InitEncoderSafe(WebRtcACMCodecParams* codecParams,
-                                         bool forceInitialization) {
+int16_t ACMGenericCodec::InitEncoderSafe(WebRtcACMCodecParams* codec_params,
+                                         bool force_initialization) {
   // Check if we got a valid set of parameters.
   int mirrorID;
-  int codecNumber = ACMCodecDB::CodecNumber(&(codecParams->codecInstant),
-                                            &mirrorID);
-  if (codecNumber < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  int codec_number = ACMCodecDB::CodecNumber(&(codec_params->codec_inst),
+                                             &mirrorID);
+  if (codec_number < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InitEncoderSafe: error, codec number negative");
     return -1;
   }
   // Check if the parameters are for this codec.
-  if ((_codecID >= 0) && (_codecID != codecNumber) && (_codecID != mirrorID)) {
-    // The current codec is not the same as the one given by codecParams.
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
-        "InitEncoderSafe: current codec is not the same as the one given by "
-        "codecParams");
+  if ((codec_id_ >= 0) && (codec_id_ != codec_number) &&
+      (codec_id_ != mirrorID)) {
+    // The current codec is not the same as the one given by codec_params.
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
+                 "InitEncoderSafe: current codec is not the same as the one "
+                 "given by codec_params");
     return -1;
   }
 
-  if (!CanChangeEncodingParam(codecParams->codecInstant)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  if (!CanChangeEncodingParam(codec_params->codec_inst)) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InitEncoderSafe: cannot change encoding parameters");
     return -1;
   }
 
-  if (_encoderInitialized && !forceInitialization) {
+  if (encoder_initialized_ && !force_initialization) {
     // The encoder is already initialized, and we don't want to force
     // initialization.
     return 0;
   }
   int16_t status;
-  if (!_encoderExist) {
+  if (!encoder_exist_) {
     // New encoder, start with creating.
-    _encoderInitialized = false;
+    encoder_initialized_ = false;
     status = CreateEncoder();
     if (status < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "InitEncoderSafe: cannot create encoder");
       return -1;
     } else {
-      _encoderExist = true;
+      encoder_exist_ = true;
     }
   }
-  _frameLenSmpl = (codecParams->codecInstant).pacsize;
-  _noChannels = codecParams->codecInstant.channels;
-  status = InternalInitEncoder(codecParams);
+  frame_len_smpl_ = (codec_params->codec_inst).pacsize;
+  num_channels_ = codec_params->codec_inst.channels;
+  status = InternalInitEncoder(codec_params);
   if (status < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InitEncoderSafe: error in init encoder");
-    _encoderInitialized = false;
+    encoder_initialized_ = false;
     return -1;
   } else {
     // Store encoder parameters.
-    memcpy(&_encoderParams, codecParams, sizeof(WebRtcACMCodecParams));
-    _encoderInitialized = true;
-    if (_inAudio == NULL) {
-      _inAudio = new int16_t[AUDIO_BUFFER_SIZE_W16];
-      if (_inAudio == NULL) {
+    memcpy(&encoder_params_, codec_params, sizeof(WebRtcACMCodecParams));
+    encoder_initialized_ = true;
+    if (in_audio_ == NULL) {
+      in_audio_ = new int16_t[AUDIO_BUFFER_SIZE_W16];
+      if (in_audio_ == NULL) {
         return -1;
       }
-      memset(_inAudio, 0, AUDIO_BUFFER_SIZE_W16 * sizeof(int16_t));
+      memset(in_audio_, 0, AUDIO_BUFFER_SIZE_W16 * sizeof(int16_t));
     }
-    if (_inTimestamp == NULL) {
-      _inTimestamp = new uint32_t[TIMESTAMP_BUFFER_SIZE_W32];
-      if (_inTimestamp == NULL) {
+    if (in_timestamp_ == NULL) {
+      in_timestamp_ = new uint32_t[TIMESTAMP_BUFFER_SIZE_W32];
+      if (in_timestamp_ == NULL) {
         return -1;
       }
-      memset(_inTimestamp, 0, sizeof(uint32_t) * TIMESTAMP_BUFFER_SIZE_W32);
+      memset(in_timestamp_, 0, sizeof(uint32_t) * TIMESTAMP_BUFFER_SIZE_W32);
     }
-    _isAudioBuffFresh = true;
+    is_audio_buff_fresh_ = true;
   }
-  status = SetVADSafe(codecParams->enableDTX, codecParams->enableVAD,
-                      codecParams->vadMode);
+  status = SetVADSafe(codec_params->enable_dtx, codec_params->enable_vad,
+                      codec_params->vad_mode);
 
   return status;
 }
 
 // TODO(tlegrand): Remove the function CanChangeEncodingParam. Returns true
 // for all codecs.
-bool ACMGenericCodec::CanChangeEncodingParam(CodecInst& /*codecInst*/) {
+bool ACMGenericCodec::CanChangeEncodingParam(CodecInst& /*codec_inst*/) {
   return true;
 }
 
-int16_t ACMGenericCodec::InitDecoder(WebRtcACMCodecParams* codecParams,
-                                     bool forceInitialization) {
-  WriteLockScoped lockCodc(_codecWrapperLock);
-  WriteLockScoped lockNetEq(*_netEqDecodeLock);
-  return InitDecoderSafe(codecParams, forceInitialization);
+int16_t ACMGenericCodec::InitDecoder(WebRtcACMCodecParams* codec_params,
+                                     bool force_initialization) {
+  WriteLockScoped lockCodc(codec_wrapper_lock_);
+  WriteLockScoped lockNetEq(*neteq_decode_lock_);
+  return InitDecoderSafe(codec_params, force_initialization);
 }
 
-int16_t ACMGenericCodec::InitDecoderSafe(WebRtcACMCodecParams* codecParams,
-                                         bool forceInitialization) {
-  int mirrorID;
+int16_t ACMGenericCodec::InitDecoderSafe(WebRtcACMCodecParams* codec_params,
+                                         bool force_initialization) {
+  int mirror_id;
   // Check if we got a valid set of parameters.
-  int codecNumber = ACMCodecDB::ReceiverCodecNumber(&codecParams->codecInstant,
-                                                    &mirrorID);
-  if (codecNumber < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  int codec_number = ACMCodecDB::ReceiverCodecNumber(&codec_params->codec_inst,
+                                                     &mirror_id);
+  if (codec_number < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InitDecoderSafe: error, invalid codec number");
     return -1;
   }
   // Check if the parameters are for this codec.
-  if ((_codecID >= 0) && (_codecID != codecNumber) && (_codecID != mirrorID)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
-        "InitDecoderSafe: current codec is not the same as the one given "
-        "by codecParams");
-    // The current codec is not the same as the one given by codecParams.
+  if ((codec_id_ >= 0) && (codec_id_ != codec_number) &&
+      (codec_id_ != mirror_id)) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
+                 "InitDecoderSafe: current codec is not the same as the one "
+                 "given by codec_params");
+    // The current codec is not the same as the one given by codec_params.
     return -1;
   }
 
-  if (_decoderInitialized && !forceInitialization) {
+  if (decoder_initialized_ && !force_initialization) {
     // The decoder is already initialized, and we don't want to force
     // initialization.
     return 0;
   }
 
   int16_t status;
-  if (!_decoderExist) {
+  if (!decoder_exist_) {
     // New decoder, start with creating.
-    _decoderInitialized = false;
+    decoder_initialized_ = false;
     status = CreateDecoder();
     if (status < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "InitDecoderSafe: cannot create decoder");
       return -1;
     } else {
-      _decoderExist = true;
+      decoder_exist_ = true;
     }
   }
 
-  status = InternalInitDecoder(codecParams);
+  status = InternalInitDecoder(codec_params);
   if (status < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InitDecoderSafe: cannot init decoder");
-    _decoderInitialized = false;
+    decoder_initialized_ = false;
     return -1;
   } else {
     // Store decoder parameters.
-    SaveDecoderParamSafe(codecParams);
-    _decoderInitialized = true;
+    SaveDecoderParamSafe(codec_params);
+    decoder_initialized_ = true;
   }
   return 0;
 }
 
-int16_t ACMGenericCodec::ResetDecoder(int16_t payloadType) {
-  WriteLockScoped lockCodec(_codecWrapperLock);
-  WriteLockScoped lockNetEq(*_netEqDecodeLock);
-  return ResetDecoderSafe(payloadType);
+int16_t ACMGenericCodec::ResetDecoder(int16_t payload_type) {
+  WriteLockScoped lockCodec(codec_wrapper_lock_);
+  WriteLockScoped lockNetEq(*neteq_decode_lock_);
+  return ResetDecoderSafe(payload_type);
 }
 
-int16_t ACMGenericCodec::ResetDecoderSafe(int16_t payloadType) {
-  WebRtcACMCodecParams decoderParams;
-  if (!_decoderExist || !_decoderInitialized) {
+int16_t ACMGenericCodec::ResetDecoderSafe(int16_t payload_type) {
+  WebRtcACMCodecParams decoder_params;
+  if (!decoder_exist_ || !decoder_initialized_) {
     return 0;
   }
   // Initialization of the decoder should work for all the codec. For codecs
   // that needs to keep some states an overloading implementation of
   // |DecoderParamsSafe| exists.
-  DecoderParamsSafe(&decoderParams, static_cast<uint8_t>(payloadType));
-  return InternalInitDecoder(&decoderParams);
+  DecoderParamsSafe(&decoder_params, static_cast<uint8_t>(payload_type));
+  return InternalInitDecoder(&decoder_params);
 }
 
 void ACMGenericCodec::ResetNoMissedSamples() {
-  WriteLockScoped cs(_codecWrapperLock);
-  _noMissedSamples = 0;
+  WriteLockScoped cs(codec_wrapper_lock_);
+  num_missed_samples_ = 0;
 }
 
-void ACMGenericCodec::IncreaseNoMissedSamples(const int16_t noSamples) {
-  _noMissedSamples += noSamples;
+void ACMGenericCodec::IncreaseNoMissedSamples(const int16_t num_samples) {
+  num_missed_samples_ += num_samples;
 }
 
 // Get the number of missed samples, this can be public.
 uint32_t ACMGenericCodec::NoMissedSamples() const {
-  ReadLockScoped cs(_codecWrapperLock);
-  return _noMissedSamples;
+  ReadLockScoped cs(codec_wrapper_lock_);
+  return num_missed_samples_;
 }
 
 void ACMGenericCodec::DestructEncoder() {
-  WriteLockScoped wl(_codecWrapperLock);
+  WriteLockScoped wl(codec_wrapper_lock_);
 
   // Disable VAD and delete the instance.
-  if (_ptrVADInst != NULL) {
-    WebRtcVad_Free(_ptrVADInst);
-    _ptrVADInst = NULL;
+  if (ptr_vad_inst_ != NULL) {
+    WebRtcVad_Free(ptr_vad_inst_);
+    ptr_vad_inst_ = NULL;
   }
-  _vadEnabled = false;
-  _vadMode = VADNormal;
+  vad_enabled_ = false;
+  vad_mode_ = VADNormal;
 
   // Disable DTX and delete the instance.
-  _dtxEnabled = false;
-  if (_ptrDTXInst != NULL) {
-    WebRtcCng_FreeEnc(_ptrDTXInst);
-    _ptrDTXInst = NULL;
+  dtx_enabled_ = false;
+  if (ptr_dtx_inst_ != NULL) {
+    WebRtcCng_FreeEnc(ptr_dtx_inst_);
+    ptr_dtx_inst_ = NULL;
   }
-  _numLPCParams = kNewCNGNumPLCParams;
+  num_lpc_params_ = kNewCNGNumPLCParams;
 
   DestructEncoderSafe();
 }
 
 void ACMGenericCodec::DestructDecoder() {
-  WriteLockScoped wl(_codecWrapperLock);
-  _decoderParams.codecInstant.pltype = -1;
+  WriteLockScoped wl(codec_wrapper_lock_);
+  decoder_params_.codec_inst.pltype = -1;
   DestructDecoderSafe();
 }
 
-int16_t ACMGenericCodec::SetBitRate(const int32_t bitRateBPS) {
-  WriteLockScoped wl(_codecWrapperLock);
-  return SetBitRateSafe(bitRateBPS);
+int16_t ACMGenericCodec::SetBitRate(const int32_t bitrate_bps) {
+  WriteLockScoped wl(codec_wrapper_lock_);
+  return SetBitRateSafe(bitrate_bps);
 }
 
-int16_t ACMGenericCodec::SetBitRateSafe(const int32_t bitRateBPS) {
+int16_t ACMGenericCodec::SetBitRateSafe(const int32_t bitrate_bps) {
   // If the codec can change the bit-rate this function is overloaded.
   // Otherwise the only acceptable value is the one that is in the database.
-  CodecInst codecParams;
-  if (ACMCodecDB::Codec(_codecID, &codecParams) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  CodecInst codec_params;
+  if (ACMCodecDB::Codec(codec_id_, &codec_params) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "SetBitRateSafe: error in ACMCodecDB::Codec");
     return -1;
   }
-  if (codecParams.rate != bitRateBPS) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  if (codec_params.rate != bitrate_bps) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "SetBitRateSafe: rate value is not acceptable");
     return -1;
   } else {
@@ -738,7 +745,7 @@
 
 // iSAC specific functions:
 int32_t ACMGenericCodec::GetEstimatedBandwidth() {
-  WriteLockScoped wl(_codecWrapperLock);
+  WriteLockScoped wl(codec_wrapper_lock_);
   return GetEstimatedBandwidthSafe();
 }
 
@@ -747,157 +754,159 @@
   return -1;
 }
 
-int32_t ACMGenericCodec::SetEstimatedBandwidth(int32_t estimatedBandwidth) {
-  WriteLockScoped wl(_codecWrapperLock);
-  return SetEstimatedBandwidthSafe(estimatedBandwidth);
+int32_t ACMGenericCodec::SetEstimatedBandwidth(int32_t estimated_bandwidth) {
+  WriteLockScoped wl(codec_wrapper_lock_);
+  return SetEstimatedBandwidthSafe(estimated_bandwidth);
 }
 
 int32_t ACMGenericCodec::SetEstimatedBandwidthSafe(
-    int32_t /*estimatedBandwidth*/) {
+    int32_t /*estimated_bandwidth*/) {
   // All codecs but iSAC will return -1.
   return -1;
 }
 // End of iSAC specific functions.
 
-int32_t ACMGenericCodec::GetRedPayload(uint8_t* redPayload,
-                                       int16_t* payloadBytes) {
-  WriteLockScoped wl(_codecWrapperLock);
-  return GetRedPayloadSafe(redPayload, payloadBytes);
+int32_t ACMGenericCodec::GetRedPayload(uint8_t* red_payload,
+                                       int16_t* payload_bytes) {
+  WriteLockScoped wl(codec_wrapper_lock_);
+  return GetRedPayloadSafe(red_payload, payload_bytes);
 }
 
-int32_t ACMGenericCodec::GetRedPayloadSafe(uint8_t* /* redPayload */,
-                                           int16_t* /* payloadBytes */) {
+int32_t ACMGenericCodec::GetRedPayloadSafe(uint8_t* /* red_payload */,
+                                           int16_t* /* payload_bytes */) {
   return -1;  // Do nothing by default.
 }
 
 int16_t ACMGenericCodec::CreateEncoder() {
   int16_t status = 0;
-  if (!_encoderExist) {
+  if (!encoder_exist_) {
     status = InternalCreateEncoder();
     // We just created the codec and obviously it is not initialized.
-    _encoderInitialized = false;
+    encoder_initialized_ = false;
   }
   if (status < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "CreateEncoder: error in internal create encoder");
-    _encoderExist = false;
+    encoder_exist_ = false;
   } else {
-    _encoderExist = true;
+    encoder_exist_ = true;
   }
   return status;
 }
 
 int16_t ACMGenericCodec::CreateDecoder() {
   int16_t status = 0;
-  if (!_decoderExist) {
+  if (!decoder_exist_) {
     status = InternalCreateDecoder();
     // Decoder just created and obviously it is not initialized.
-    _decoderInitialized = false;
+    decoder_initialized_ = false;
   }
   if (status < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "CreateDecoder: error in internal create decoder");
-    _decoderExist = false;
+    decoder_exist_ = false;
   } else {
-    _decoderExist = true;
+    decoder_exist_ = true;
   }
   return status;
 }
 
-void ACMGenericCodec::DestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    WriteLockScoped lockCodec(_codecWrapperLock);
-    ReadLockScoped lockNetEq(*_netEqDecodeLock);
-    InternalDestructEncoderInst(ptrInst);
+void ACMGenericCodec::DestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    WriteLockScoped lockCodec(codec_wrapper_lock_);
+    ReadLockScoped lockNetEq(*neteq_decode_lock_);
+    InternalDestructEncoderInst(ptr_inst);
   }
 }
 
 // Get the current audio buffer including read and write states, and timestamps.
-int16_t ACMGenericCodec::AudioBuffer(WebRtcACMAudioBuff& audioBuff) {
-  ReadLockScoped cs(_codecWrapperLock);
-  memcpy(audioBuff.inAudio, _inAudio,
+int16_t ACMGenericCodec::AudioBuffer(WebRtcACMAudioBuff& audio_buff) {
+  ReadLockScoped cs(codec_wrapper_lock_);
+  memcpy(audio_buff.in_audio, in_audio_,
          AUDIO_BUFFER_SIZE_W16 * sizeof(int16_t));
-  audioBuff.inAudioIxRead = _inAudioIxRead;
-  audioBuff.inAudioIxWrite = _inAudioIxWrite;
-  memcpy(audioBuff.inTimestamp, _inTimestamp,
+  audio_buff.in_audio_ix_read = in_audio_ix_read_;
+  audio_buff.in_audio_ix_write = in_audio_ix_write_;
+  memcpy(audio_buff.in_timestamp, in_timestamp_,
          TIMESTAMP_BUFFER_SIZE_W32 * sizeof(uint32_t));
-  audioBuff.inTimestampIxWrite = _inTimestampIxWrite;
-  audioBuff.lastTimestamp = _lastTimestamp;
+  audio_buff.in_timestamp_ix_write = in_timestamp_ix_write_;
+  audio_buff.last_timestamp = last_timestamp_;
   return 0;
 }
 
 // Set the audio buffer.
-int16_t ACMGenericCodec::SetAudioBuffer(WebRtcACMAudioBuff& audioBuff) {
-  WriteLockScoped cs(_codecWrapperLock);
-  memcpy(_inAudio, audioBuff.inAudio,
+int16_t ACMGenericCodec::SetAudioBuffer(WebRtcACMAudioBuff& audio_buff) {
+  WriteLockScoped cs(codec_wrapper_lock_);
+  memcpy(in_audio_, audio_buff.in_audio,
          AUDIO_BUFFER_SIZE_W16 * sizeof(int16_t));
-  _inAudioIxRead = audioBuff.inAudioIxRead;
-  _inAudioIxWrite = audioBuff.inAudioIxWrite;
-  memcpy(_inTimestamp, audioBuff.inTimestamp,
+  in_audio_ix_read_ = audio_buff.in_audio_ix_read;
+  in_audio_ix_write_ = audio_buff.in_audio_ix_write;
+  memcpy(in_timestamp_, audio_buff.in_timestamp,
          TIMESTAMP_BUFFER_SIZE_W32 * sizeof(uint32_t));
-  _inTimestampIxWrite = audioBuff.inTimestampIxWrite;
-  _lastTimestamp = audioBuff.lastTimestamp;
-  _isAudioBuffFresh = false;
+  in_timestamp_ix_write_ = audio_buff.in_timestamp_ix_write;
+  last_timestamp_ = audio_buff.last_timestamp;
+  is_audio_buff_fresh_ = false;
   return 0;
 }
 
 uint32_t ACMGenericCodec::LastEncodedTimestamp() const {
-  ReadLockScoped cs(_codecWrapperLock);
-  return _lastEncodedTimestamp;
+  ReadLockScoped cs(codec_wrapper_lock_);
+  return last_encoded_timestamp_;
 }
 
 uint32_t ACMGenericCodec::EarliestTimestamp() const {
-  ReadLockScoped cs(_codecWrapperLock);
-  return _inTimestamp[0];
+  ReadLockScoped cs(codec_wrapper_lock_);
+  return in_timestamp_[0];
 }
 
-int16_t ACMGenericCodec::SetVAD(const bool enableDTX, const bool enableVAD,
+int16_t ACMGenericCodec::SetVAD(const bool enable_dtx,
+                                const bool enable_vad,
                                 const ACMVADMode mode) {
-  WriteLockScoped cs(_codecWrapperLock);
-  return SetVADSafe(enableDTX, enableVAD, mode);
+  WriteLockScoped cs(codec_wrapper_lock_);
+  return SetVADSafe(enable_dtx, enable_vad, mode);
 }
 
-int16_t ACMGenericCodec::SetVADSafe(const bool enableDTX, const bool enableVAD,
+int16_t ACMGenericCodec::SetVADSafe(const bool enable_dtx,
+                                    const bool enable_vad,
                                     const ACMVADMode mode) {
-  if (enableDTX) {
+  if (enable_dtx) {
     // Make G729 AnnexB a special case.
-    if (!STR_CASE_CMP(_encoderParams.codecInstant.plname, "G729")
-        && !_hasInternalDTX) {
+    if (!STR_CASE_CMP(encoder_params_.codec_inst.plname, "G729")
+        && !has_internal_dtx_) {
       if (ACMGenericCodec::EnableDTX() < 0) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                      "SetVADSafe: error in enable DTX");
         return -1;
       }
     } else {
       if (EnableDTX() < 0) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                      "SetVADSafe: error in enable DTX");
         return -1;
       }
     }
 
-    if (_hasInternalDTX) {
+    if (has_internal_dtx_) {
       // Codec has internal DTX, practically we don't need WebRtc VAD, however,
       // we let the user to turn it on if they need call-backs on silence.
       // Store VAD mode for future even if VAD is off.
-      _vadMode = mode;
-      return (enableVAD) ? EnableVAD(mode) : DisableVAD();
+      vad_mode_ = mode;
+      return (enable_vad) ? EnableVAD(mode) : DisableVAD();
     } else {
       // Codec does not have internal DTX so enabling DTX requires an active
-      // VAD. 'enableDTX == true' overwrites VAD status.
+      // VAD. 'enable_dtx == true' overwrites VAD status.
       if (EnableVAD(mode) < 0) {
         // If we cannot create VAD we have to disable DTX.
-        if (!_vadEnabled) {
+        if (!vad_enabled_) {
           DisableDTX();
         }
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                      "SetVADSafe: error in enable VAD");
         return -1;
       }
 
       // Return '1', to let the caller know VAD was turned on, even if the
       // function was called with VAD='false'.
-      if (enableVAD == false) {
+      if (enable_vad == false) {
         return 1;
       } else {
         return 0;
@@ -905,145 +914,146 @@
     }
   } else {
     // Make G729 AnnexB a special case.
-    if (!STR_CASE_CMP(_encoderParams.codecInstant.plname, "G729")
-        && !_hasInternalDTX) {
+    if (!STR_CASE_CMP(encoder_params_.codec_inst.plname, "G729")
+        && !has_internal_dtx_) {
       ACMGenericCodec::DisableDTX();
     } else {
       DisableDTX();
     }
-    return (enableVAD) ? EnableVAD(mode) : DisableVAD();
+    return (enable_vad) ? EnableVAD(mode) : DisableVAD();
   }
 }
 
 int16_t ACMGenericCodec::EnableDTX() {
-  if (_hasInternalDTX) {
+  if (has_internal_dtx_) {
     // We should not be here if we have internal DTX this function should be
     // overloaded by the derived class in this case.
     return -1;
   }
-  if (!_dtxEnabled) {
-    if (WebRtcCng_CreateEnc(&_ptrDTXInst) < 0) {
-      _ptrDTXInst = NULL;
+  if (!dtx_enabled_) {
+    if (WebRtcCng_CreateEnc(&ptr_dtx_inst_) < 0) {
+      ptr_dtx_inst_ = NULL;
       return -1;
     }
-    uint16_t freqHz;
-    EncoderSampFreq(freqHz);
-    if (WebRtcCng_InitEnc(_ptrDTXInst, freqHz, kCngSidIntervalMsec,
-                          _numLPCParams) < 0) {
+    uint16_t freq_hz;
+    EncoderSampFreq(freq_hz);
+    if (WebRtcCng_InitEnc(ptr_dtx_inst_, freq_hz, kCngSidIntervalMsec,
+                          num_lpc_params_) < 0) {
       // Couldn't initialize, has to return -1, and free the memory.
-      WebRtcCng_FreeEnc(_ptrDTXInst);
-      _ptrDTXInst = NULL;
+      WebRtcCng_FreeEnc(ptr_dtx_inst_);
+      ptr_dtx_inst_ = NULL;
       return -1;
     }
-    _dtxEnabled = true;
+    dtx_enabled_ = true;
   }
   return 0;
 }
 
 int16_t ACMGenericCodec::DisableDTX() {
-  if (_hasInternalDTX) {
+  if (has_internal_dtx_) {
     // We should not be here if we have internal DTX this function should be
     // overloaded by the derived class in this case.
     return -1;
   }
-  if (_ptrDTXInst != NULL) {
-    WebRtcCng_FreeEnc(_ptrDTXInst);
-    _ptrDTXInst = NULL;
+  if (ptr_dtx_inst_ != NULL) {
+    WebRtcCng_FreeEnc(ptr_dtx_inst_);
+    ptr_dtx_inst_ = NULL;
   }
-  _dtxEnabled = false;
+  dtx_enabled_ = false;
   return 0;
 }
 
 int16_t ACMGenericCodec::EnableVAD(ACMVADMode mode) {
   if ((mode < VADNormal) || (mode > VADVeryAggr)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "EnableVAD: error in VAD mode range");
     return -1;
   }
 
-  if (!_vadEnabled) {
-    if (WebRtcVad_Create(&_ptrVADInst) < 0) {
-      _ptrVADInst = NULL;
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  if (!vad_enabled_) {
+    if (WebRtcVad_Create(&ptr_vad_inst_) < 0) {
+      ptr_vad_inst_ = NULL;
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "EnableVAD: error in create VAD");
       return -1;
     }
-    if (WebRtcVad_Init(_ptrVADInst) < 0) {
-      WebRtcVad_Free(_ptrVADInst);
-      _ptrVADInst = NULL;
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    if (WebRtcVad_Init(ptr_vad_inst_) < 0) {
+      WebRtcVad_Free(ptr_vad_inst_);
+      ptr_vad_inst_ = NULL;
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "EnableVAD: error in init VAD");
       return -1;
     }
   }
 
   // Set the VAD mode to the given value.
-  if (WebRtcVad_set_mode(_ptrVADInst, mode) < 0) {
+  if (WebRtcVad_set_mode(ptr_vad_inst_, mode) < 0) {
     // We failed to set the mode and we have to return -1. If we already have a
-    // working VAD (_vadEnabled == true) then we leave it to work. Otherwise,
+    // working VAD (vad_enabled_ == true) then we leave it to work. Otherwise,
     // the following will be executed.
-    if (!_vadEnabled) {
+    if (!vad_enabled_) {
       // We just created the instance but cannot set the mode we have to free
       // the memory.
-      WebRtcVad_Free(_ptrVADInst);
-      _ptrVADInst = NULL;
+      WebRtcVad_Free(ptr_vad_inst_);
+      ptr_vad_inst_ = NULL;
     }
-    WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, unique_id_,
                  "EnableVAD: failed to set the VAD mode");
     return -1;
   }
-  _vadMode = mode;
-  _vadEnabled = true;
+  vad_mode_ = mode;
+  vad_enabled_ = true;
   return 0;
 }
 
 int16_t ACMGenericCodec::DisableVAD() {
-  if (_ptrVADInst != NULL) {
-    WebRtcVad_Free(_ptrVADInst);
-    _ptrVADInst = NULL;
+  if (ptr_vad_inst_ != NULL) {
+    WebRtcVad_Free(ptr_vad_inst_);
+    ptr_vad_inst_ = NULL;
   }
-  _vadEnabled = false;
+  vad_enabled_ = false;
   return 0;
 }
 
-int32_t ACMGenericCodec::ReplaceInternalDTX(const bool replaceInternalDTX) {
-  WriteLockScoped cs(_codecWrapperLock);
-  return ReplaceInternalDTXSafe(replaceInternalDTX);
+int32_t ACMGenericCodec::ReplaceInternalDTX(const bool replace_internal_dtx) {
+  WriteLockScoped cs(codec_wrapper_lock_);
+  return ReplaceInternalDTXSafe(replace_internal_dtx);
 }
 
 int32_t ACMGenericCodec::ReplaceInternalDTXSafe(
-    const bool /* replaceInternalDTX */) {
+    const bool /* replace_internal_dtx */) {
   return -1;
 }
 
-int32_t ACMGenericCodec::IsInternalDTXReplaced(bool* internalDTXReplaced) {
-  WriteLockScoped cs(_codecWrapperLock);
-  return IsInternalDTXReplacedSafe(internalDTXReplaced);
+int32_t ACMGenericCodec::IsInternalDTXReplaced(bool* internal_dtx_replaced) {
+  WriteLockScoped cs(codec_wrapper_lock_);
+  return IsInternalDTXReplacedSafe(internal_dtx_replaced);
 }
 
-int32_t ACMGenericCodec::IsInternalDTXReplacedSafe(bool* internalDTXReplaced) {
-  *internalDTXReplaced = false;
+int32_t ACMGenericCodec::IsInternalDTXReplacedSafe(
+    bool* internal_dtx_replaced) {
+  *internal_dtx_replaced = false;
   return 0;
 }
 
-int16_t ACMGenericCodec::ProcessFrameVADDTX(uint8_t* bitStream,
-                                            int16_t* bitStreamLenByte,
-                                            int16_t* samplesProcessed) {
-  if (!_vadEnabled) {
-    // VAD not enabled, set all vadLable[] to 1 (speech detected).
+int16_t ACMGenericCodec::ProcessFrameVADDTX(uint8_t* bitstream,
+                                            int16_t* bitstream_len_byte,
+                                            int16_t* samples_processed) {
+  if (!vad_enabled_) {
+    // VAD not enabled, set all |vad_lable_[]| to 1 (speech detected).
     for (int n = 0; n < MAX_FRAME_SIZE_10MSEC; n++) {
-      _vadLabel[n] = 1;
+      vad_label_[n] = 1;
     }
-    *samplesProcessed = 0;
+    *samples_processed = 0;
     return 0;
   }
 
-  uint16_t freqHz;
-  EncoderSampFreq(freqHz);
+  uint16_t freq_hz;
+  EncoderSampFreq(freq_hz);
 
   // Calculate number of samples in 10 ms blocks, and number ms in one frame.
-  int16_t samplesIn10Msec = static_cast<int16_t>(freqHz / 100);
-  int32_t frameLenMsec = static_cast<int32_t>(_frameLenSmpl) * 1000 / freqHz;
+  int16_t samples_in_10ms = static_cast<int16_t>(freq_hz / 100);
+  int32_t frame_len_ms = static_cast<int32_t>(frame_len_smpl_) * 1000 / freq_hz;
   int16_t status;
 
   // Vector for storing maximum 30 ms of mono audio at 48 kHz.
@@ -1051,43 +1061,44 @@
 
   // Calculate number of VAD-blocks to process, and number of samples in each
   // block.
-  int noSamplesToProcess[2];
-  if (frameLenMsec == 40) {
+  int num_samples_to_process[2];
+  if (frame_len_ms == 40) {
     // 20 ms in each VAD block.
-    noSamplesToProcess[0] = noSamplesToProcess[1] = 2 * samplesIn10Msec;
+    num_samples_to_process[0] = num_samples_to_process[1] = 2 * samples_in_10ms;
   } else {
     // For 10-30 ms framesizes, second VAD block will be size zero ms,
     // for 50 and 60 ms first VAD block will be 30 ms.
-    noSamplesToProcess[0] =
-        (frameLenMsec > 30) ? 3 * samplesIn10Msec : _frameLenSmpl;
-    noSamplesToProcess[1] = _frameLenSmpl - noSamplesToProcess[0];
+    num_samples_to_process[0] =
+        (frame_len_ms > 30) ? 3 * samples_in_10ms : frame_len_smpl_;
+    num_samples_to_process[1] = frame_len_smpl_ - num_samples_to_process[0];
   }
 
-  int offSet = 0;
-  int loops = (noSamplesToProcess[1] > 0) ? 2 : 1;
+  int offset = 0;
+  int loops = (num_samples_to_process[1] > 0) ? 2 : 1;
   for (int i = 0; i < loops; i++) {
+    // TODO(turajs): Do we need to care about VAD together with stereo?
     // If stereo, calculate mean of the two channels.
-    if (_noChannels == 2) {
-      for (int j = 0; j < noSamplesToProcess[i]; j++) {
-        audio[j] = (_inAudio[(offSet + j) * 2] +
-            _inAudio[(offSet + j) * 2 + 1]) / 2;
+    if (num_channels_ == 2) {
+      for (int j = 0; j < num_samples_to_process[i]; j++) {
+        audio[j] = (in_audio_[(offset + j) * 2] +
+            in_audio_[(offset + j) * 2 + 1]) / 2;
       }
-      offSet = noSamplesToProcess[0];
+      offset = num_samples_to_process[0];
     } else {
-      // Mono, copy data from _inAudio to continue work on.
-      memcpy(audio, _inAudio, sizeof(int16_t) * noSamplesToProcess[i]);
+      // Mono, copy data from in_audio_ to continue work on.
+      memcpy(audio, in_audio_, sizeof(int16_t) * num_samples_to_process[i]);
     }
 
     // Call VAD.
-    status = static_cast<int16_t>(WebRtcVad_Process(_ptrVADInst,
-                                                    static_cast<int>(freqHz),
+    status = static_cast<int16_t>(WebRtcVad_Process(ptr_vad_inst_,
+                                                    static_cast<int>(freq_hz),
                                                     audio,
-                                                    noSamplesToProcess[i]));
-    _vadLabel[i] = status;
+                                                    num_samples_to_process[i]));
+    vad_label_[i] = status;
 
     if (status < 0) {
       // This will force that the data be removed from the buffer.
-      *samplesProcessed += noSamplesToProcess[i];
+      *samples_processed += num_samples_to_process[i];
       return -1;
     }
 
@@ -1095,41 +1106,41 @@
     // first part of a frame gets the VAD decision "inactive". Otherwise DTX
     // might say it is time to transmit SID frame, but we will encode the whole
     // frame, because the first part is active.
-    *samplesProcessed = 0;
-    if ((status == 0) && (i == 0) && _dtxEnabled && !_hasInternalDTX) {
-      int16_t bitStreamLen;
-      int num10MsecFrames = noSamplesToProcess[i] / samplesIn10Msec;
-      *bitStreamLenByte = 0;
-      for (int n = 0; n < num10MsecFrames; n++) {
+    *samples_processed = 0;
+    if ((status == 0) && (i == 0) && dtx_enabled_ && !has_internal_dtx_) {
+      int16_t bitstream_len;
+      int num_10ms_frames = num_samples_to_process[i] / samples_in_10ms;
+      *bitstream_len_byte = 0;
+      for (int n = 0; n < num_10ms_frames; n++) {
         // This block is (passive) && (vad enabled). If first CNG after
         // speech, force SID by setting last parameter to "1".
-        status = WebRtcCng_Encode(_ptrDTXInst, &audio[n * samplesIn10Msec],
-                                  samplesIn10Msec, bitStream, &bitStreamLen,
-                                  !_prev_frame_cng);
+        status = WebRtcCng_Encode(ptr_dtx_inst_, &audio[n * samples_in_10ms],
+                                  samples_in_10ms, bitstream, &bitstream_len,
+                                  !prev_frame_cng_);
         if (status < 0) {
           return -1;
         }
 
         // Update previous frame was CNG.
-        _prev_frame_cng = 1;
+        prev_frame_cng_ = 1;
 
-        *samplesProcessed += samplesIn10Msec * _noChannels;
+        *samples_processed += samples_in_10ms * num_channels_;
 
-        // |bitStreamLen| will only be > 0 once per 100 ms.
-        *bitStreamLenByte += bitStreamLen;
+        // |bitstream_len_byte| will only be > 0 once per 100 ms.
+        *bitstream_len_byte += bitstream_len;
       }
 
       // Check if all samples got processed by the DTX.
-      if (*samplesProcessed != noSamplesToProcess[i] * _noChannels) {
+      if (*samples_processed != num_samples_to_process[i] * num_channels_) {
         // Set to zero since something went wrong. Shouldn't happen.
-        *samplesProcessed = 0;
+        *samples_processed = 0;
       }
     } else {
       // Update previous frame was not CNG.
-      _prev_frame_cng = 0;
+      prev_frame_cng_ = 0;
     }
 
-    if (*samplesProcessed > 0) {
+    if (*samples_processed > 0) {
       // The block contains inactive speech, and is processed by DTX.
       // Discontinue running VAD.
       break;
@@ -1140,85 +1151,88 @@
 }
 
 int16_t ACMGenericCodec::SamplesLeftToEncode() {
-  ReadLockScoped rl(_codecWrapperLock);
-  return (_frameLenSmpl <= _inAudioIxWrite) ? 0 :
-      (_frameLenSmpl - _inAudioIxWrite);
+  ReadLockScoped rl(codec_wrapper_lock_);
+  return (frame_len_smpl_ <= in_audio_ix_write_) ? 0 :
+      (frame_len_smpl_ - in_audio_ix_write_);
 }
 
 void ACMGenericCodec::SetUniqueID(const uint32_t id) {
-  _uniqueID = id;
+  unique_id_ = id;
 }
 
 bool ACMGenericCodec::IsAudioBufferFresh() const {
-  ReadLockScoped rl(_codecWrapperLock);
-  return _isAudioBuffFresh;
+  ReadLockScoped rl(codec_wrapper_lock_);
+  return is_audio_buff_fresh_;
 }
 
 // This function is replaced by codec specific functions for some codecs.
-int16_t ACMGenericCodec::EncoderSampFreq(uint16_t& sampFreqHz) {
+int16_t ACMGenericCodec::EncoderSampFreq(uint16_t& samp_freq_hz) {
   int32_t f;
-  f = ACMCodecDB::CodecFreq(_codecID);
+  f = ACMCodecDB::CodecFreq(codec_id_);
   if (f < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "EncoderSampFreq: codec frequency is negative");
     return -1;
   } else {
-    sampFreqHz = static_cast<uint16_t>(f);
+    samp_freq_hz = static_cast<uint16_t>(f);
     return 0;
   }
 }
 
 int32_t ACMGenericCodec::ConfigISACBandwidthEstimator(
-    const uint8_t /* initFrameSizeMsec */,
-    const uint16_t /* initRateBitPerSec */,
-    const bool /* enforceFrameSize  */) {
-  WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, _uniqueID,
-      "The send-codec is not iSAC, failed to config iSAC bandwidth estimator.");
+    const uint8_t /* init_frame_size_msec */,
+    const uint16_t /* init_rate_bit_per_sec */,
+    const bool /* enforce_frame_size  */) {
+  WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, unique_id_,
+               "The send-codec is not iSAC, failed to config iSAC bandwidth "
+               "estimator.");
   return -1;
 }
 
-int32_t ACMGenericCodec::SetISACMaxRate(const uint32_t /* maxRateBitPerSec */) {
-  WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, _uniqueID,
+int32_t ACMGenericCodec::SetISACMaxRate(
+    const uint32_t /* max_rate_bit_per_sec */) {
+  WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, unique_id_,
                "The send-codec is not iSAC, failed to set iSAC max rate.");
   return -1;
 }
 
 int32_t ACMGenericCodec::SetISACMaxPayloadSize(
-    const uint16_t /* maxPayloadLenBytes */) {
-  WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, _uniqueID,
-      "The send-codec is not iSAC, failed to set iSAC max payload-size.");
+    const uint16_t /* max_payload_len_bytes */) {
+  WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, unique_id_,
+               "The send-codec is not iSAC, failed to set iSAC max "
+               "payload-size.");
   return -1;
 }
 
 void ACMGenericCodec::SaveDecoderParam(
-    const WebRtcACMCodecParams* codecParams) {
-  WriteLockScoped wl(_codecWrapperLock);
-  SaveDecoderParamSafe(codecParams);
+    const WebRtcACMCodecParams* codec_params) {
+  WriteLockScoped wl(codec_wrapper_lock_);
+  SaveDecoderParamSafe(codec_params);
 }
 
 void ACMGenericCodec::SaveDecoderParamSafe(
-    const WebRtcACMCodecParams* codecParams) {
-  memcpy(&_decoderParams, codecParams, sizeof(WebRtcACMCodecParams));
+    const WebRtcACMCodecParams* codec_params) {
+  memcpy(&decoder_params_, codec_params, sizeof(WebRtcACMCodecParams));
 }
 
 int16_t ACMGenericCodec::UpdateEncoderSampFreq(
-    uint16_t /* encoderSampFreqHz */) {
-  WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
-      "It is asked for a change in smapling frequency while the current "
-      "send-codec supports only one sampling rate.");
+    uint16_t /* samp_freq_hz */) {
+  WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
+               "It is asked for a change in smapling frequency while the "
+               "current  send-codec supports only one sampling rate.");
   return -1;
 }
 
-void ACMGenericCodec::SetIsMaster(bool isMaster) {
-  WriteLockScoped wl(_codecWrapperLock);
-  _isMaster = isMaster;
+void ACMGenericCodec::SetIsMaster(bool is_master) {
+  WriteLockScoped wl(codec_wrapper_lock_);
+  is_master_ = is_master;
 }
 
-int16_t ACMGenericCodec::REDPayloadISAC(const int32_t /* isacRate */,
-                                        const int16_t /* isacBwEstimate */,
+int16_t ACMGenericCodec::REDPayloadISAC(const int32_t /* isac_rate */,
+                                        const int16_t /* isac_bw_estimate */,
                                         uint8_t* /* payload */,
-                                        int16_t* /* payloadLenBytes */) {
-  WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+                                        int16_t* /* payload_len_bytes */) {
+  WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                "Error: REDPayloadISAC is an iSAC specific function");
   return -1;
 }
diff --git a/webrtc/modules/audio_coding/main/source/acm_generic_codec.h b/webrtc/modules/audio_coding/main/source/acm_generic_codec.h
index 42d1386..681f56e 100644
--- a/webrtc/modules/audio_coding/main/source/acm_generic_codec.h
+++ b/webrtc/modules/audio_coding/main/source/acm_generic_codec.h
@@ -11,11 +11,11 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_GENERIC_CODEC_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_GENERIC_CODEC_H_
 
-#include "acm_common_defs.h"
-#include "audio_coding_module_typedefs.h"
-#include "rw_lock_wrapper.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/system_wrappers/interface/rw_lock_wrapper.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 #define MAX_FRAME_SIZE_10MSEC 6
 
@@ -57,8 +57,8 @@
   // A) Neither VAD nor DTX is active; the frame is encoded by the encoder.
   //
   // B) VAD is enabled but not DTX; in this case the audio is processed by VAD
-  //    and encoded by the encoder. The "*encodingType" will be either
-  //    "activeNormalEncode" or "passiveNormalEncode" if frame is active or
+  //    and encoded by the encoder. The "*encoding_type" will be either
+  //    "kActiveNormalEncode" or "kPassiveNormalEncode" if frame is active or
   //    passive, respectively.
   //
   // C) DTX is enabled; if the codec has internal VAD/DTX we just encode the
@@ -70,13 +70,13 @@
   // the actual processing.
   //
   // Outputs:
-  //   -bitStream          : a buffer where bit-stream will be written to.
-  //   -bitStreamLenByte   : contains the length of the bit-stream in
+  //   -bitstream          : a buffer where bit-stream will be written to.
+  //   -bitstream_len_byte : contains the length of the bit-stream in
   //                         bytes.
-  //   -timeStamp          : contains the RTP timestamp, this is the
+  //   -timestamp          : contains the RTP timestamp, this is the
   //                         sampling time of the first sample encoded
   //                         (measured in number of samples).
-  //   -encodingType       : contains the type of encoding applied on the
+  //   -encoding_type       : contains the type of encoding applied on the
   //                         audio samples. The alternatives are
   //                         (c.f. acm_common_types.h)
   //                         -kNoEncoding:
@@ -100,10 +100,10 @@
   //   -1 if error is occurred, otherwise the length of the bit-stream in
   //      bytes.
   //
-  WebRtc_Word16 Encode(WebRtc_UWord8* bitStream,
-                       WebRtc_Word16* bitStreamLenByte,
-                       WebRtc_UWord32* timeStamp,
-                       WebRtcACMEncodingType* encodingType);
+  WebRtc_Word16 Encode(WebRtc_UWord8* bitstream,
+                       WebRtc_Word16* bitstream_len_byte,
+                       WebRtc_UWord32* timestamp,
+                       WebRtcACMEncodingType* encoding_type);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word16 Decode()
@@ -114,22 +114,24 @@
   // the actual processing. Please note that this is not functional yet.
   //
   // Inputs:
-  //   -bitStream          : a buffer where bit-stream will be read.
-  //   -bitStreamLenByte   : the length of the bit-stream in bytes.
+  //   -bitstream         : a buffer where bit-stream will be read.
+  //   -bitstream_len_byte : the length of the bit-stream in bytes.
   //
   // Outputs:
   //   -audio              : pointer to a buffer where the audio will written.
-  //   -audioSamples       : number of audio samples out of decoding the given
+  //   -audio_samples      : number of audio samples out of decoding the given
   //                         bit-stream.
-  //   -speechType         : speech type (for future use).
+  //   -speech_type        : speech type (for future use).
   //
   // Return value:
   //   -1 if failed to decode,
   //    0 if succeeded.
   //
-  WebRtc_Word16 Decode(WebRtc_UWord8* bitStream, WebRtc_Word16 bitStreamLenByte,
-                       WebRtc_Word16* audio, WebRtc_Word16* audioSamples,
-                       WebRtc_Word8* speechType);
+  WebRtc_Word16 Decode(WebRtc_UWord8* bitstream,
+                       WebRtc_Word16 bitstream_len_byte,
+                       WebRtc_Word16* audio,
+                       WebRtc_Word16* audio_samples,
+                       WebRtc_Word8* speech_type);
 
   ///////////////////////////////////////////////////////////////////////////
   // void SplitStereoPacket()
@@ -146,9 +148,9 @@
   //                          twice the input in case of true stereo, where
   //                          we simply copy the data and return it both for
   //                          left channel and right channel decoding.
+  //
   virtual void SplitStereoPacket(WebRtc_UWord8* /* payload */,
-                                 WebRtc_Word32* /* payload_length */) {
-  }
+                                 WebRtc_Word32* /* payload_length */) {}
 
   ///////////////////////////////////////////////////////////////////////////
   // bool EncoderInitialized();
@@ -174,7 +176,7 @@
   // EncoderParamsSafe() in turn.
   //
   // Output:
-  //   -encParams          : a buffer where the encoder parameters is
+  //   -enc_params         : a buffer where the encoder parameters is
   //                         written to. If the encoder is not
   //                         initialized this buffer is filled with
   //                         invalid values
@@ -182,8 +184,7 @@
   //   -1 if the encoder is not initialized,
   //    0 otherwise.
   //
-  //
-  WebRtc_Word16 EncoderParams(WebRtcACMCodecParams *encParams);
+  WebRtc_Word16 EncoderParams(WebRtcACMCodecParams *enc_params);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word16 DecoderParams(...)
@@ -191,7 +192,7 @@
   // in turn.
   //
   // Output:
-  //   -decParams          : a buffer where the decoder parameters is
+  //   -dec_params         : a buffer where the decoder parameters is
   //                         written to. If the decoder is not initialized
   //                         this buffer is filled with invalid values
   //
@@ -200,8 +201,8 @@
   //    0 otherwise.
   //
   //
-  bool DecoderParams(WebRtcACMCodecParams *decParams,
-                     const WebRtc_UWord8 payloadType);
+  bool DecoderParams(WebRtcACMCodecParams *dec_params,
+                     const WebRtc_UWord8 payload_type);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word16 InitEncoder(...)
@@ -209,18 +210,18 @@
   // parameters.
   //
   // Input:
-  //   -codecParams        : parameters of encoder.
-  //   -forceInitialization: if false the initialization is invoked only if
-  //                         the encoder is not initialized. If true the
-  //                         encoder is forced to (re)initialize.
+  //   -codec_params        : parameters of encoder.
+  //   -force_initialization: if false the initialization is invoked only if
+  //                          the encoder is not initialized. If true the
+  //                          encoder is forced to (re)initialize.
   //
   // Return value:
   //   0 if could initialize successfully,
   //  -1 if failed to initialize.
   //
   //
-  WebRtc_Word16 InitEncoder(WebRtcACMCodecParams* codecParams,
-                            bool forceInitialization);
+  WebRtc_Word16 InitEncoder(WebRtcACMCodecParams* codec_params,
+                            bool force_initialization);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word16 InitDecoder()
@@ -229,33 +230,33 @@
   // definition of the structure)
   //
   // Input:
-  //   -codecParams        : parameters of decoder.
-  //   -forceInitialization: if false the initialization is invoked only
-  //                         if the decoder is not initialized. If true
-  //                         the encoder is forced to(re)initialize.
+  //   -codec_params        : parameters of decoder.
+  //   -force_initialization: if false the initialization is invoked only
+  //                          if the decoder is not initialized. If true
+  //                          the encoder is forced to(re)initialize.
   //
   // Return value:
   //   0 if could initialize successfully,
   //  -1 if failed to initialize.
   //
   //
-  WebRtc_Word16 InitDecoder(WebRtcACMCodecParams* codecParams,
-                            bool forceInitialization);
+  WebRtc_Word16 InitDecoder(WebRtcACMCodecParams* codec_params,
+                            bool force_initialization);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 RegisterInNetEq(...)
   // This function is called to register the decoder in NetEq, with the given
-  // payload-type.
+  // payload type.
   //
   // Inputs:
-  //   -netEq              : pointer to NetEq Instance
-  //   -codecInst          : instance with of the codec settings of the codec
+  //   -neteq              : pointer to NetEq Instance
+  //   -codec_inst         : instance with of the codec settings of the codec
   //
   // Return values
   //   -1 if failed to register,
   //    0 if successfully initialized.
   //
-  WebRtc_Word32 RegisterInNetEq(ACMNetEQ* netEq, const CodecInst& codecInst);
+  WebRtc_Word32 RegisterInNetEq(ACMNetEQ* neteq, const CodecInst& codec_inst);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 Add10MsData(...)
@@ -263,23 +264,23 @@
   // the codec.
   //
   // Inputs:
-  //   -timeStamp          : the timestamp of the 10 ms audio. the timestamp
+  //   -timestamp          : the timestamp of the 10 ms audio. the timestamp
   //                         is the sampling time of the
   //                         first sample measured in number of samples.
   //   -data               : a buffer that contains the audio. The codec
   //                         expects to get the audio in correct sampling
   //                         frequency
   //   -length             : the length of the audio buffer
-  //   -audioChannel       : 0 for mono, 1 for stereo (not supported yet)
+  //   -audio_channel      : 0 for mono, 1 for stereo (not supported yet)
   //
   // Return values:
   //   -1 if failed
   //    0 otherwise.
   //
-  WebRtc_Word32 Add10MsData(const WebRtc_UWord32 timeStamp,
+  WebRtc_Word32 Add10MsData(const WebRtc_UWord32 timestamp,
                             const WebRtc_Word16* data,
                             const WebRtc_UWord16 length,
-                            const WebRtc_UWord8 audioChannel);
+                            const WebRtc_UWord8 audio_channel);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_UWord32 NoMissedSamples()
@@ -305,26 +306,26 @@
   // The function is called to set the encoding rate.
   //
   // Input:
-  //   -bitRateBPS         : encoding rate in bits per second
+  //   -bitrate_bps        : encoding rate in bits per second
   //
   // Return value:
   //   -1 if failed to set the rate, due to invalid input or given
   //      codec is not rate-adjustable.
   //    0 if the rate is adjusted successfully
   //
-  WebRtc_Word16 SetBitRate(const WebRtc_Word32 bitRateBPS);
+  WebRtc_Word16 SetBitRate(const WebRtc_Word32 bitrate_bps);
 
   ///////////////////////////////////////////////////////////////////////////
   // DestructEncoderInst()
   // This API is used in conferencing. It will free the memory that is pointed
-  // by "ptrInst". "ptrInst" is a pointer to encoder instance, created and
+  // by |ptr_inst|. |ptr_inst| is a pointer to encoder instance, created and
   // filled up by calling EncoderInst(...).
   //
   // Inputs:
-  //   -ptrInst            : pointer to an encoder instance to be deleted.
+  //   -ptr_inst            : pointer to an encoder instance to be deleted.
   //
   //
-  void DestructEncoderInst(void* ptrInst);
+  void DestructEncoderInst(void* ptr_inst);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word16 AudioBuffer()
@@ -334,14 +335,14 @@
   // as timestamps...
   //
   // Output:
-  //   -audioBuff          : a pointer to WebRtcACMAudioBuff where the audio
+  //   -audio_buff         : a pointer to WebRtcACMAudioBuff where the audio
   //                         buffer of this codec will be written to.
   //
   // Return value:
   //   -1 if fails to copy the audio buffer,
   //    0 if succeeded.
   //
-  WebRtc_Word16 AudioBuffer(WebRtcACMAudioBuff& audioBuff);
+  WebRtc_Word16 AudioBuffer(WebRtcACMAudioBuff& audio_buff);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_UWord32 EarliestTimestamp()
@@ -362,7 +363,7 @@
   //   -1 if fails to copy the audio buffer,
   //    0 if succeeded.
   //
-  WebRtc_Word16 SetAudioBuffer(WebRtcACMAudioBuff& audioBuff);
+  WebRtc_Word16 SetAudioBuffer(WebRtcACMAudioBuff& audio_buff);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word16 SetVAD()
@@ -376,24 +377,24 @@
   // are kept.
   //
   // Inputs:
-  //   -enableDTX          : if true DTX will be enabled otherwise the DTX is
+  //   -enable_dtx         : if true DTX will be enabled otherwise the DTX is
   //                         disabled. If codec has internal DTX that will be
   //                         used, otherwise WebRtc-CNG is used. In the latter
   //                         case VAD is automatically activated.
-  //   -enableVAD          : if true WebRtc-VAD is enabled, otherwise VAD is
+  //   -enable_vad         : if true WebRtc-VAD is enabled, otherwise VAD is
   //                         disabled, except for the case that DTX is enabled
   //                         but codec doesn't have internal DTX. In this case
   //                         VAD is enabled regardless of the value of
-  //                         "enableVAD."
+  //                         |enable_vad|.
   //   -mode               : this specifies the aggressiveness of VAD.
   //
   // Return value
   //   -1 if failed to set DTX & VAD as specified,
   //    0 if succeeded.
   //
-  WebRtc_Word16 SetVAD(const bool enableDTX = true,
-                       const bool enableVAD = false, const ACMVADMode mode =
-                           VADNormal);
+  WebRtc_Word16 SetVAD(const bool enable_dtx = true,
+                       const bool enable_vad = false,
+                       const ACMVADMode mode = VADNormal);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 ReplaceInternalDTX()
@@ -402,13 +403,13 @@
   // AnnexB with WebRtc DTX. For other codecs this function has no effect.
   //
   // Input:
-  //   -replaceInternalDTX : if true the internal DTX is replaced with WebRtc.
+  //   -replace_internal_dtx : if true the internal DTX is replaced with WebRtc.
   //
   // Return value
   //   -1 if failed to replace internal DTX,
   //    0 if succeeded.
   //
-  WebRtc_Word32 ReplaceInternalDTX(const bool replaceInternalDTX);
+  WebRtc_Word32 ReplaceInternalDTX(const bool replace_internal_dtx);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 IsInternalDTXReplaced()
@@ -417,23 +418,23 @@
   // AnnexB with WebRtc DTX. For other codecs this function has no effect.
   //
   // Output:
-  //   -internalDTXReplaced  : if true the internal DTX is replaced with WebRtc.
+  //   -internal_dtx_replaced: if true the internal DTX is replaced with WebRtc.
   //
   // Return value
   //   -1 if failed to check
   //    0 if succeeded.
   //
-  WebRtc_Word32 IsInternalDTXReplaced(bool* internalDTXReplaced);
+  WebRtc_Word32 IsInternalDTXReplaced(bool* internal_dtx_replaced);
 
   ///////////////////////////////////////////////////////////////////////////
   // void SetNetEqDecodeLock()
   // Passes the NetEq lock to the codec.
   //
   // Input:
-  //   -netEqDecodeLock    : pointer to the lock associated with NetEQ of ACM.
+  //   -neteq_decode_lock  : pointer to the lock associated with NetEQ of ACM.
   //
-  void SetNetEqDecodeLock(RWLockWrapper* netEqDecodeLock) {
-    _netEqDecodeLock = netEqDecodeLock;
+  void SetNetEqDecodeLock(RWLockWrapper* neteq_decode_lock) {
+    neteq_decode_lock_ = neteq_decode_lock;
   }
 
   ///////////////////////////////////////////////////////////////////////////
@@ -445,7 +446,7 @@
   //   false otherwise.
   //
   bool HasInternalDTX() const {
-    return _hasInternalDTX;
+    return has_internal_dtx_;
   }
 
   ///////////////////////////////////////////////////////////////////////////
@@ -465,13 +466,13 @@
   // iSAC will have use for the value.
   //
   // Input:
-  //       -estimatedBandwidth:    estimated bandwidth in bits/sec
+  //       -estimated_bandwidth:    estimated bandwidth in bits/sec
   //
   // Return value:
   //   -1 if fails to set estimated bandwidth,
   //    0 on success.
   //
-  WebRtc_Word32 SetEstimatedBandwidth(WebRtc_Word32 estimatedBandwidth);
+  WebRtc_Word32 SetEstimatedBandwidth(WebRtc_Word32 estimated_bandwidth);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 GetRedPayload()
@@ -479,15 +480,15 @@
   // Currently only done in iSAC.
   //
   // Outputs:
-  //   -redPayload        : a pointer to the data for RED payload.
-  //   -payloadBytes      : number of bytes in RED payload.
+  //   -red_payload       : a pointer to the data for RED payload.
+  //   -payload_bytes     : number of bytes in RED payload.
   //
   // Return value:
   //   -1 if fails to get codec specific RED,
   //    0 if succeeded.
   //
-  WebRtc_Word32 GetRedPayload(WebRtc_UWord8* redPayload,
-                              WebRtc_Word16* payloadBytes);
+  WebRtc_Word32 GetRedPayload(WebRtc_UWord8* red_payload,
+                              WebRtc_Word16* payload_bytes);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word16 ResetEncoder()
@@ -510,7 +511,7 @@
   //   -1 if failed,
   //    0 if succeeded.
   //
-  WebRtc_Word16 ResetDecoder(WebRtc_Word16 payloadType);
+  WebRtc_Word16 ResetDecoder(WebRtc_Word16 payload_type);
 
   ///////////////////////////////////////////////////////////////////////////
   // void DestructEncoder()
@@ -551,7 +552,7 @@
 
   ///////////////////////////////////////////////////////////////////////////
   // SetUniqueID()
-  // Set a unique ID for the codec to be used for tracing and debuging
+  // Set a unique ID for the codec to be used for tracing and debugging
   //
   // Input
   //   -id                 : A number to identify the codec.
@@ -572,28 +573,28 @@
   // UpdateDecoderSampFreq()
   // For most of the codecs this function does nothing. It must be
   // implemented for those codecs that one codec instance serves as the
-  // decoder for different flavers of the codec. One example is iSAC. there,
+  // decoder for different flavors of the codec. One example is iSAC. there,
   // iSAC 16 kHz and iSAC 32 kHz are treated as two different codecs with
   // different payload types, however, there is only one iSAC instance to
   // decode. The reason for that is we would like to decode and encode with
   // the same codec instance for bandwidth estimator to work.
   //
-  // Each time that we receive a new payload type, we call this funtion to
+  // Each time that we receive a new payload type, we call this function to
   // prepare the decoder associated with the new payload. Normally, decoders
   // doesn't have to do anything. For iSAC the decoder has to change it's
-  // sampling rate. The input parameter specifies the current flaver of the
+  // sampling rate. The input parameter specifies the current flavor of the
   // codec in codec database. For instance, if we just got a SWB payload then
   // the input parameter is ACMCodecDB::isacswb.
   //
   // Input:
-  //   -codecId            : the ID of the codec associated with the
+  //   -codec_id           : the ID of the codec associated with the
   //                         payload type that we just received.
   //
   // Return value:
   //    0 if succeeded in updating the decoder.
   //   -1 if failed to update.
   //
-  virtual WebRtc_Word16 UpdateDecoderSampFreq(WebRtc_Word16 /* codecId */) {
+  virtual WebRtc_Word16 UpdateDecoderSampFreq(WebRtc_Word16 /* codec_id */) {
     return 0;
   }
 
@@ -607,32 +608,33 @@
   // is treated as a change in parameter. Therefore, we need this function.
   //
   // Input:
-  //   -encoderSampFreqHz  : encoder sampling frequency.
+  //   -samp_freq_hz        : encoder sampling frequency.
   //
   // Return value:
   //   -1 if failed, or if this is meaningless for the given codec.
   //    0 if succeeded.
   //
-  virtual WebRtc_Word16 UpdateEncoderSampFreq(WebRtc_UWord16 encoderSampFreqHz);
+  virtual WebRtc_Word16 UpdateEncoderSampFreq(
+      WebRtc_UWord16 samp_freq_hz);
 
   ///////////////////////////////////////////////////////////////////////////
   // EncoderSampFreq()
   // Get the sampling frequency that the encoder (WebRtc wrapper) expects.
   //
   // Output:
-  //   -sampFreqHz         : sampling frequency, in Hertz, which the encoder
+  //   -samp_freq_hz       : sampling frequency, in Hertz, which the encoder
   //                         should be fed with.
   //
   // Return value:
   //   -1 if failed to output sampling rate.
   //    0 if the sample rate is returned successfully.
   //
-  virtual WebRtc_Word16 EncoderSampFreq(WebRtc_UWord16& sampFreqHz);
+  virtual WebRtc_Word16 EncoderSampFreq(WebRtc_UWord16& samp_freq_hz);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word32 ConfigISACBandwidthEstimator()
   // Call this function to configure the bandwidth estimator of ISAC.
-  // During the adaptation of bit-rate, iSAC atomatically adjusts the
+  // During the adaptation of bit-rate, iSAC automatically adjusts the
   // frame-size (either 30 or 60 ms) to save on RTP header. The initial
   // frame-size can be specified by the first argument. The configuration also
   // regards the initial estimate of bandwidths. The estimator starts from
@@ -641,72 +643,73 @@
   // adaptation of frame-size. This is specified by the last parameter.
   //
   // Input:
-  //   -initFrameSizeMsec  : initial frame-size in milisecods. For iSAC-wb
+  //   -init_frame_fize_ms : initial frame-size in milliseconds. For iSAC-wb
   //                         30 ms and 60 ms (default) are acceptable values,
   //                         and for iSAC-swb 30 ms is the only acceptable
-  //                         value. Zero indiates default value.
-  //   -initRateBitPerSec  : initial estimate of the bandwidth. Values
+  //                         value. Zero indicates default value.
+  //   -init_rate_bps      : initial estimate of the bandwidth. Values
   //                         between 10000 and 58000 are acceptable.
-  //   -enforceFrameSize   : if true, the frame-size will not be adapted.
+  //   -enforce_frame_size : if true, the frame-size will not be adapted.
   //
   // Return value:
   //   -1 if failed to configure the bandwidth estimator,
   //    0 if the configuration was successfully applied.
   //
   virtual WebRtc_Word32 ConfigISACBandwidthEstimator(
-      const WebRtc_UWord8 initFrameSizeMsec,
-      const WebRtc_UWord16 initRateBitPerSec, const bool enforceFrameSize);
+      const WebRtc_UWord8 init_frame_size_msec,
+      const WebRtc_UWord16 init_rate_bps,
+      const bool enforce_frame_size);
 
   ///////////////////////////////////////////////////////////////////////////
   // SetISACMaxPayloadSize()
   // Set the maximum payload size of iSAC packets. No iSAC payload,
   // regardless of its frame-size, may exceed the given limit. For
   // an iSAC payload of size B bits and frame-size T sec we have;
-  // (B < maxPayloadLenBytes * 8) and (B/T < maxRateBitPerSec), c.f.
+  // (B < max_payload_len_bytes * 8) and (B/T < max_rate_bit_per_sec), c.f.
   // SetISACMaxRate().
   //
   // Input:
-  //   -maxPayloadLenBytes : maximum payload size in bytes.
+  //   -max_payload_len_bytes : maximum payload size in bytes.
   //
   // Return value:
-  //   -1 if failed to set the maximm  payload-size.
-  //    0 if the given linit is seet successfully.
+  //   -1 if failed to set the maximum  payload-size.
+  //    0 if the given length is set successfully.
   //
   virtual WebRtc_Word32 SetISACMaxPayloadSize(
-      const WebRtc_UWord16 maxPayloadLenBytes);
+      const WebRtc_UWord16 max_payload_len_bytes);
 
   ///////////////////////////////////////////////////////////////////////////
   // SetISACMaxRate()
   // Set the maximum instantaneous rate of iSAC. For a payload of B bits
-  // with a frame-size of T sec the instantaneous rate is B/T bist per
-  // second. Therefore, (B/T < maxRateBitPerSec) and
-  // (B < maxPayloadLenBytes * 8) are always satisfied for iSAC payloads,
+  // with a frame-size of T sec the instantaneous rate is B/T bits per
+  // second. Therefore, (B/T < max_rate_bit_per_sec) and
+  // (B < max_payload_len_bytes * 8) are always satisfied for iSAC payloads,
   // c.f SetISACMaxPayloadSize().
   //
   // Input:
-  //   -maxRateBitPerSec   : maximum instantaneous bit-rate given in bits/sec.
+  //   -max_rate_bps       : maximum instantaneous bit-rate given in bits/sec.
   //
   // Return value:
   //   -1 if failed to set the maximum rate.
   //    0 if the maximum rate is set successfully.
   //
-  virtual WebRtc_Word32 SetISACMaxRate(const WebRtc_UWord32 maxRateBitPerSec);
+  virtual WebRtc_Word32 SetISACMaxRate(const WebRtc_UWord32 max_rate_bps);
 
   ///////////////////////////////////////////////////////////////////////////
   // SaveDecoderParamS()
   // Save the parameters of decoder.
   //
   // Input:
-  //   -codecParams        : pointer to a struct where the parameters of
+  //   -codec_params       : pointer to a structure where the parameters of
   //                         decoder is stored in.
   //
-  void SaveDecoderParam(const WebRtcACMCodecParams* codecParams);
+  void SaveDecoderParam(const WebRtcACMCodecParams* codec_params);
 
   WebRtc_Word32 FrameSize() {
-    return _frameLenSmpl;
+    return frame_len_smpl_;
   }
 
-  void SetIsMaster(bool isMaster);
+  void SetIsMaster(bool is_master);
 
   ///////////////////////////////////////////////////////////////////////////
   // REDPayloadISAC()
@@ -714,28 +717,27 @@
   // payload from a default-encoder.
   //
   // Inputs:
-  //   -isacRate           : the target rate of the main payload. A RED
+  //   -isac_rate          : the target rate of the main payload. A RED
   //                         payload is generated according to the rate of
   //                         main payload. Note that we are not specifying the
   //                         rate of RED payload, but the main payload.
-  //   -isacBwEstimate     : bandwidth information should be inserted in
+  //   -isac_bw_estimate   : bandwidth information should be inserted in
   //                         RED payload.
   //
   // Output:
   //   -payload            : pointer to a buffer where the RED payload will
   //                         written to.
-  //   -payloadLenBytes    : a place-holder to write the length of the RED
+  //   -payload_len_bytes  : a place-holder to write the length of the RED
   //                         payload in Bytes.
   //
   // Return value:
-  //   -1 if an error occures, otherwise the length of the payload (in Bytes)
+  //   -1 if an error occurs, otherwise the length of the payload (in Bytes)
   //   is returned.
   //
-  //
-  virtual WebRtc_Word16 REDPayloadISAC(const WebRtc_Word32 isacRate,
-                                       const WebRtc_Word16 isacBwEstimate,
+  virtual WebRtc_Word16 REDPayloadISAC(const WebRtc_Word32 isac_rate,
+                                       const WebRtc_Word16 isac_bw_estimate,
                                        WebRtc_UWord8* payload,
-                                       WebRtc_Word16* payloadLenBytes);
+                                       WebRtc_Word16* payload_len_bytes);
 
   ///////////////////////////////////////////////////////////////////////////
   // IsTrueStereoCodec()
@@ -769,40 +771,40 @@
   // See Decode() for the description of function, input(s)/output(s) and
   // return value.
   //
-  virtual WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                                   WebRtc_Word16 bitStreamLenByte,
+  virtual WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                                   WebRtc_Word16 bitstream_len_byte,
                                    WebRtc_Word16* audio,
-                                   WebRtc_Word16* audioSamples,
-                                   WebRtc_Word8* speechType) = 0;
+                                   WebRtc_Word16* audio_samples,
+                                   WebRtc_Word8* speech_type) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // See Add10MsSafe() for the description of function, input(s)/output(s)
   // and return value.
   //
-  virtual WebRtc_Word32 Add10MsDataSafe(const WebRtc_UWord32 timeStamp,
+  virtual WebRtc_Word32 Add10MsDataSafe(const WebRtc_UWord32 timestamp,
                                         const WebRtc_Word16* data,
                                         const WebRtc_UWord16 length,
-                                        const WebRtc_UWord8 audioChannel);
+                                        const WebRtc_UWord8 audio_channel);
 
   ///////////////////////////////////////////////////////////////////////////
   // See RegisterInNetEq() for the description of function,
   // input(s)/output(s) and  return value.
   //
-  virtual WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                 const CodecInst& codecInst) = 0;
+  virtual WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                 const CodecInst& codec_inst) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // See EncoderParam() for the description of function, input(s)/output(s)
   // and return value.
   //
-  WebRtc_Word16 EncoderParamsSafe(WebRtcACMCodecParams *encParams);
+  WebRtc_Word16 EncoderParamsSafe(WebRtcACMCodecParams *enc_params);
 
   ///////////////////////////////////////////////////////////////////////////
   // See DecoderParam for the description of function, input(s)/output(s)
   // and return value.
   //
   // Note:
-  // Any Class where a single instance handle several flavers of the
+  // Any Class where a single instance handle several flavors of the
   // same codec, therefore, several payload types are associated with
   // the same instance have to implement this function.
   //
@@ -811,8 +813,8 @@
   // can be registered as receive codec. Hence two payloads are associated
   // with a single codec instance.
   //
-  virtual bool DecoderParamsSafe(WebRtcACMCodecParams *decParams,
-                                 const WebRtc_UWord8 payloadType);
+  virtual bool DecoderParamsSafe(WebRtcACMCodecParams *dec_params,
+                                 const WebRtc_UWord8 payload_type);
 
   ///////////////////////////////////////////////////////////////////////////
   // See ResetEncoder() for the description of function, input(s)/output(s)
@@ -824,21 +826,21 @@
   // See InitEncoder() for the description of function, input(s)/output(s)
   // and return value.
   //
-  WebRtc_Word16 InitEncoderSafe(WebRtcACMCodecParams *codecParams,
-                                bool forceInitialization);
+  WebRtc_Word16 InitEncoderSafe(WebRtcACMCodecParams *codec_params,
+                                bool force_initialization);
 
   ///////////////////////////////////////////////////////////////////////////
   // See InitDecoder() for the description of function, input(s)/output(s)
   // and return value.
   //
-  WebRtc_Word16 InitDecoderSafe(WebRtcACMCodecParams *codecParams,
-                                bool forceInitialization);
+  WebRtc_Word16 InitDecoderSafe(WebRtcACMCodecParams *codec_params,
+                                bool force_initialization);
 
   ///////////////////////////////////////////////////////////////////////////
   // See ResetDecoder() for the description of function, input(s)/output(s)
   // and return value.
   //
-  WebRtc_Word16 ResetDecoderSafe(WebRtc_Word16 payloadType);
+  WebRtc_Word16 ResetDecoderSafe(WebRtc_Word16 payload_type);
 
   ///////////////////////////////////////////////////////////////////////////
   // See DestructEncoder() for the description of function,
@@ -858,7 +860,7 @@
   //
   // Any codec that can change the bit-rate has to implement this.
   //
-  virtual WebRtc_Word16 SetBitRateSafe(const WebRtc_Word32 bitRateBPS);
+  virtual WebRtc_Word16 SetBitRateSafe(const WebRtc_Word32 bitrate_bps);
 
   ///////////////////////////////////////////////////////////////////////////
   // See GetEstimatedBandwidth() for the description of function,
@@ -871,34 +873,34 @@
   // input(s)/output(s) and return value.
   //
   virtual WebRtc_Word32 SetEstimatedBandwidthSafe(
-      WebRtc_Word32 estimatedBandwidth);
+      WebRtc_Word32 estimated_bandwidth);
 
   ///////////////////////////////////////////////////////////////////////////
   // See GetRedPayload() for the description of function, input(s)/output(s)
   // and return value.
   //
-  virtual WebRtc_Word32 GetRedPayloadSafe(WebRtc_UWord8* redPayload,
-                                          WebRtc_Word16* payloadBytes);
+  virtual WebRtc_Word32 GetRedPayloadSafe(WebRtc_UWord8* red_payload,
+                                          WebRtc_Word16* payload_bytes);
 
   ///////////////////////////////////////////////////////////////////////////
   // See SetVAD() for the description of function, input(s)/output(s) and
   // return value.
   //
-  WebRtc_Word16 SetVADSafe(const bool enableDTX = true, const bool enableVAD =
-                               false,
+  WebRtc_Word16 SetVADSafe(const bool enable_dtx = true,
+                           const bool enable_vad = false,
                            const ACMVADMode mode = VADNormal);
 
   ///////////////////////////////////////////////////////////////////////////
   // See ReplaceInternalDTX() for the description of function, input and
   // return value.
   //
-  virtual WebRtc_Word32 ReplaceInternalDTXSafe(const bool replaceInternalDTX);
+  virtual WebRtc_Word32 ReplaceInternalDTXSafe(const bool replace_internal_dtx);
 
   ///////////////////////////////////////////////////////////////////////////
   // See IsInternalDTXReplaced() for the description of function, input and
   // return value.
   //
-  virtual WebRtc_Word32 IsInternalDTXReplacedSafe(bool* internalDTXReplaced);
+  virtual WebRtc_Word32 IsInternalDTXReplacedSafe(bool* internal_dtx_replaced);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word16 CreateEncoder()
@@ -973,17 +975,17 @@
   // encode a frame of audio.
   //
   // Outputs:
-  //   -bitStream          : pointer to a buffer where the bit-stream is
+  //   -bitstream          : pointer to a buffer where the bit-stream is
   //                         written to.
-  //   -bitStreamLenByte   : the length of the bit-stream in bytes,
+  //   -bitstream_len_byte : the length of the bit-stream in bytes,
   //                         a negative value indicates error.
   //
   // Return value:
   //   -1 if failed,
   //   otherwise the length of the bit-stream is returned.
   //
-  virtual WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitStream,
-                                       WebRtc_Word16* bitStreamLenByte) = 0;
+  virtual WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
+                                       WebRtc_Word16* bitstream_len_byte) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word16 InternalInitEncoder()
@@ -992,9 +994,9 @@
   // encoder parameters.
   //
   // Input:
-  //   -codecParams        : pointer to a structure that contains parameters to
+  //   -codec_params       : pointer to a structure that contains parameters to
   //                         initialize encoder.
-  //                         Set codecParam->CodecInst.rate to -1 for
+  //                         Set codec_params->codec_inst.rate to -1 for
   //                         iSAC to operate in adaptive mode.
   //                         (to do: if frame-length is -1 frame-length will be
   //                         automatically adjusted, otherwise, given
@@ -1005,7 +1007,7 @@
   //    0 if succeeded.
   //
   virtual WebRtc_Word16 InternalInitEncoder(
-      WebRtcACMCodecParams *codecParams) = 0;
+      WebRtcACMCodecParams *codec_params) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word16 InternalInitDecoder()
@@ -1014,7 +1016,7 @@
   // decoder parameters.
   //
   // Input:
-  //   -codecParams        : pointer to a structure that contains parameters to
+  //   -codec_params       : pointer to a structure that contains parameters to
   //                         initialize encoder.
   //
   // Return value:
@@ -1022,7 +1024,7 @@
   //    0 if succeeded.
   //
   virtual WebRtc_Word16 InternalInitDecoder(
-      WebRtcACMCodecParams *codecParams) = 0;
+      WebRtcACMCodecParams *codec_params) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // void IncreaseNoMissedSamples()
@@ -1030,10 +1032,10 @@
   // overwritten in the audio buffer.
   //
   // Input:
-  //   -noSamples          : the number of overwritten samples is incremented
+  //   -num_samples        : the number of overwritten samples is incremented
   //                         by this value.
   //
-  void IncreaseNoMissedSamples(const WebRtc_Word16 noSamples);
+  void IncreaseNoMissedSamples(const WebRtc_Word16 num_samples);
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word16 InternalCreateEncoder()
@@ -1064,17 +1066,17 @@
   // This is a codec-specific method, used in conferencing, called from
   // DestructEncoderInst(). The input argument is pointer to encoder instance
   // (codec instance for codecs that encoder and decoder share the same
-  // instance). This method is called to free the memory that "ptrInst" is
+  // instance). This method is called to free the memory that |ptr_inst| is
   // pointing to.
   //
   // Input:
-  //   -ptrInst            : pointer to encoder instance.
+  //   -ptr_inst           : pointer to encoder instance.
   //
   // Return value:
   //   -1 if failed,
   //    0 if succeeded.
   //
-  virtual void InternalDestructEncoderInst(void* ptrInst) = 0;
+  virtual void InternalDestructEncoderInst(void* ptr_inst) = 0;
 
   ///////////////////////////////////////////////////////////////////////////
   // WebRtc_Word16 InternalResetEncoder()
@@ -1098,123 +1100,123 @@
   // by VAD & CN/DTX. If a frame is divided into two blocks then there are two
   // cases. First, the first block is active, the second block will not be
   // processed by CN/DTX but only by VAD and return to caller with
-  // '*samplesProcessed' set to zero. There, the audio frame will be encoded
+  // '*samples_processed' set to zero. There, the audio frame will be encoded
   // by the encoder. Second, the first block is inactive and is processed by
   // CN/DTX, then we stop processing the next block and return to the caller
-  // which is EncodeSafe(), with "*samplesProcessed" equal to the number of
+  // which is EncodeSafe(), with "*samples_processed" equal to the number of
   // samples in first block.
   //
   // Output:
-  //   -bitStream          : pointer to a buffer where DTX frame, if
+  //   -bitstream          : pointer to a buffer where DTX frame, if
   //                         generated, will be written to.
-  //   -bitStreamLenByte   : contains the length of bit-stream in bytes, if
+  //   -bitstream_len_byte : contains the length of bit-stream in bytes, if
   //                         generated. Zero if no bit-stream is generated.
-  //   -noSamplesProcessed : contains no of samples that actually CN has
+  //   -samples_processed  : contains no of samples that actually CN has
   //                         processed. Those samples processed by CN will not
   //                         be encoded by the encoder, obviously. If
   //                         contains zero, it means that the frame has been
   //                         identified as active by VAD. Note that
-  //                         "*noSamplesProcessed" might be non-zero but
-  //                         "*bitStreamLenByte" be zero.
+  //                         "*samples_processed" might be non-zero but
+  //                         "*bitstream_len_byte" be zero.
   //
   // Return value:
   //   -1 if failed,
   //    0 if succeeded.
   //
-  WebRtc_Word16 ProcessFrameVADDTX(WebRtc_UWord8* bitStream,
-                                   WebRtc_Word16* bitStreamLenByte,
-                                   WebRtc_Word16* samplesProcessed);
+  WebRtc_Word16 ProcessFrameVADDTX(WebRtc_UWord8* bitstream,
+                                   WebRtc_Word16* bitstream_len_byte,
+                                   WebRtc_Word16* samples_processed);
 
   ///////////////////////////////////////////////////////////////////////////
   // CanChangeEncodingParam()
   // Check if the codec parameters can be changed. In conferencing normally
-  // codec parametrs cannot be changed. The exception is bit-rate of isac.
+  // codec parameters cannot be changed. The exception is bit-rate of isac.
   //
   // return value:
   //   -true  if codec parameters are allowed to change.
-  //   -flase otherwise.
+  //   -false otherwise.
   //
-  virtual bool CanChangeEncodingParam(CodecInst& codecInst);
+  virtual bool CanChangeEncodingParam(CodecInst& codec_inst);
 
   ///////////////////////////////////////////////////////////////////////////
   // CurrentRate()
   // Call to get the current encoding rate of the encoder. This function
-  // should be overwritten for codecs whic automatically change their
+  // should be overwritten for codecs which automatically change their
   // target rate. One example is iSAC. The output of the function is the
   // current target rate.
   //
   // Output:
-  //   -rateBitPerSec      : the current target rate of the codec.
+  //   -rate_bps           : the current target rate of the codec.
   //
-  virtual void CurrentRate(WebRtc_Word32& /* rateBitPerSec */) {
+  virtual void CurrentRate(WebRtc_Word32& /* rate_bps */) {
     return;
   }
 
-  virtual void SaveDecoderParamSafe(const WebRtcACMCodecParams* codecParams);
+  virtual void SaveDecoderParamSafe(const WebRtcACMCodecParams* codec_params);
 
-  // &_inAudio[_inAudioIxWrite] always point to where new audio can be
+  // &in_audio_[in_audio_ix_write_] always point to where new audio can be
   // written to
-  WebRtc_Word16 _inAudioIxWrite;
+  WebRtc_Word16 in_audio_ix_write_;
 
-  // &_inAudio[_inAudioIxRead] points to where audio has to be read from
-  WebRtc_Word16 _inAudioIxRead;
+  // &in_audio_[in_audio_ix_read_] points to where audio has to be read from
+  WebRtc_Word16 in_audio_ix_read_;
 
-  WebRtc_Word16 _inTimestampIxWrite;
+  WebRtc_Word16 in_timestamp_ix_write_;
 
   // Where the audio is stored before encoding,
   // To save memory the following buffer can be allocated
-  // dynamically for 80ms depending on the sampling frequency
+  // dynamically for 80 ms depending on the sampling frequency
   // of the codec.
-  WebRtc_Word16* _inAudio;
-  WebRtc_UWord32* _inTimestamp;
+  WebRtc_Word16* in_audio_;
+  WebRtc_UWord32* in_timestamp_;
 
-  WebRtc_Word16 _frameLenSmpl;
-  WebRtc_UWord16 _noChannels;
+  WebRtc_Word16 frame_len_smpl_;
+  WebRtc_UWord16 num_channels_;
 
   // This will point to a static database of the supported codecs
-  WebRtc_Word16 _codecID;
+  WebRtc_Word16 codec_id_;
 
-  // This will account for the No of samples  were not encoded
-  // the case is rare, either samples are missed due to overwite
+  // This will account for the number of samples  were not encoded
+  // the case is rare, either samples are missed due to overwrite
   // at input buffer or due to encoding error
-  WebRtc_UWord32 _noMissedSamples;
+  WebRtc_UWord32 num_missed_samples_;
 
   // True if the encoder instance created
-  bool _encoderExist;
-  bool _decoderExist;
-  // True if the ecncoder instance initialized
-  bool _encoderInitialized;
-  bool _decoderInitialized;
+  bool encoder_exist_;
+  bool decoder_exist_;
+  // True if the encoder instance initialized
+  bool encoder_initialized_;
+  bool decoder_initialized_;
 
-  bool _registeredInNetEq;
+  bool registered_in_neteq_;
 
   // VAD/DTX
-  bool _hasInternalDTX;
-  WebRtcVadInst* _ptrVADInst;
-  bool _vadEnabled;
-  ACMVADMode _vadMode;
-  WebRtc_Word16 _vadLabel[MAX_FRAME_SIZE_10MSEC];
-  bool _dtxEnabled;
-  WebRtcCngEncInst* _ptrDTXInst;
-  WebRtc_UWord8 _numLPCParams;
-  bool _sentCNPrevious;
-  bool _isMaster;
-  int16_t _prev_frame_cng;
+  bool has_internal_dtx_;
+  WebRtcVadInst* ptr_vad_inst_;
+  bool vad_enabled_;
+  ACMVADMode vad_mode_;
+  WebRtc_Word16 vad_label_[MAX_FRAME_SIZE_10MSEC];
+  bool dtx_enabled_;
+  WebRtcCngEncInst* ptr_dtx_inst_;
+  WebRtc_UWord8 num_lpc_params_;
+  bool sent_cn_previous_;
+  bool is_master_;
+  int16_t prev_frame_cng_;
 
-  WebRtcACMCodecParams _encoderParams;
-  WebRtcACMCodecParams _decoderParams;
+  WebRtcACMCodecParams encoder_params_;
+  WebRtcACMCodecParams decoder_params_;
 
-  // Used as a global lock for all avaiable decoders
+  // Used as a global lock for all available decoders
   // so that no decoder is used when NetEQ decodes.
-  RWLockWrapper* _netEqDecodeLock;
+  RWLockWrapper* neteq_decode_lock_;
   // Used to lock wrapper internal data
   // such as buffers and state variables.
-  RWLockWrapper& _codecWrapperLock;
+  RWLockWrapper& codec_wrapper_lock_;
 
-  WebRtc_UWord32 _lastEncodedTimestamp;
-  WebRtc_UWord32 _lastTimestamp;
-  bool _isAudioBuffFresh;
-  WebRtc_UWord32 _uniqueID;
+  WebRtc_UWord32 last_encoded_timestamp_;
+  WebRtc_UWord32 last_timestamp_;
+  bool is_audio_buff_fresh_;
+  WebRtc_UWord32 unique_id_;
 };
 
 }  // namespace webrt
diff --git a/webrtc/modules/audio_coding/main/source/acm_gsmfr.cc b/webrtc/modules/audio_coding/main/source/acm_gsmfr.cc
index 18c3077..5b59ed3 100644
--- a/webrtc/modules/audio_coding/main/source/acm_gsmfr.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_gsmfr.cc
@@ -8,13 +8,13 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_gsmfr.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_gsmfr.h"
 
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 #ifdef WEBRTC_CODEC_GSMFR
 // NOTE! GSM-FR is not included in the open-source package. Modify this file
 // or your codec API to match the function calls and names of used GSM-FR API
@@ -26,9 +26,9 @@
 
 #ifndef WEBRTC_CODEC_GSMFR
 
-ACMGSMFR::ACMGSMFR(WebRtc_Word16 /* codecID */)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL) {
+ACMGSMFR::ACMGSMFR(WebRtc_Word16 /* codec_id */)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL) {
   return;
 }
 
@@ -36,16 +36,17 @@
   return;
 }
 
-WebRtc_Word16 ACMGSMFR::InternalEncode(WebRtc_UWord8* /* bitStream */,
-                                       WebRtc_Word16* /* bitStreamLenByte */) {
+WebRtc_Word16 ACMGSMFR::InternalEncode(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
-WebRtc_Word16 ACMGSMFR::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                   WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMGSMFR::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                   WebRtc_Word16 /* bitstream_len_byte */,
                                    WebRtc_Word16* /* audio */,
-                                   WebRtc_Word16* /* audioSamples */,
-                                   WebRtc_Word8* /* speechType */) {
+                                   WebRtc_Word16* /* audio_samples */,
+                                   WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
@@ -58,17 +59,17 @@
 }
 
 WebRtc_Word16 ACMGSMFR::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMGSMFR::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-WebRtc_Word32 ACMGSMFR::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef */,
-                                 const CodecInst& /* codecInst */) {
+WebRtc_Word32 ACMGSMFR::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def */,
+                                 const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -92,62 +93,62 @@
   return;
 }
 
-void ACMGSMFR::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMGSMFR::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
 #else     //===================== Actual Implementation =======================
 
-ACMGSMFR::ACMGSMFR(WebRtc_Word16 codecID)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL) {
-  _codecID = codecID;
-  _hasInternalDTX = true;
+ACMGSMFR::ACMGSMFR(WebRtc_Word16 codec_id)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL) {
+  codec_id_ = codec_id;
+  has_internal_dtx_ = true;
   return;
 }
 
 ACMGSMFR::~ACMGSMFR() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcGSMFR_FreeEnc(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcGSMFR_FreeEnc(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
-  if (_decoderInstPtr != NULL) {
-    WebRtcGSMFR_FreeDec(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcGSMFR_FreeDec(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
   return;
 }
 
-WebRtc_Word16 ACMGSMFR::InternalEncode(WebRtc_UWord8* bitStream,
-                                       WebRtc_Word16* bitStreamLenByte) {
-  *bitStreamLenByte = WebRtcGSMFR_Encode(_encoderInstPtr,
-                                         &_inAudio[_inAudioIxRead],
-                                         _frameLenSmpl,
-                                         (WebRtc_Word16*) bitStream);
+WebRtc_Word16 ACMGSMFR::InternalEncode(WebRtc_UWord8* bitstream,
+                                       WebRtc_Word16* bitstream_len_byte) {
+  *bitstream_len_byte = WebRtcGSMFR_Encode(encoder_inst_ptr_,
+                                           &in_audio_[in_audio_ix_read_],
+                                           frame_len_smpl_,
+                                           (WebRtc_Word16*)bitstream);
   // increment the read index this tell the caller that how far
   // we have gone forward in reading the audio buffer
-  _inAudioIxRead += _frameLenSmpl;
-  return *bitStreamLenByte;
+  in_audio_ix_read_ += frame_len_smpl_;
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMGSMFR::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                   WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMGSMFR::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                   WebRtc_Word16 /* bitstream_len_byte */,
                                    WebRtc_Word16* /* audio */,
-                                   WebRtc_Word16* /* audioSamples */,
-                                   WebRtc_Word8* /* speechType */) {
+                                   WebRtc_Word16* /* audio_samples */,
+                                   WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
 WebRtc_Word16 ACMGSMFR::EnableDTX() {
-  if (_dtxEnabled) {
+  if (dtx_enabled_) {
     return 0;
-  } else if (_encoderExist) {
-    if (WebRtcGSMFR_EncoderInit(_encoderInstPtr, 1) < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  } else if (encoder_exist_) {
+    if (WebRtcGSMFR_EncoderInit(encoder_inst_ptr_, 1) < 0) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "EnableDTX: cannot init encoder for GSMFR");
       return -1;
     }
-    _dtxEnabled = true;
+    dtx_enabled_ = true;
     return 0;
   } else {
     return -1;
@@ -155,15 +156,15 @@
 }
 
 WebRtc_Word16 ACMGSMFR::DisableDTX() {
-  if (!_dtxEnabled) {
+  if (!dtx_enabled_) {
     return 0;
-  } else if (_encoderExist) {
-    if (WebRtcGSMFR_EncoderInit(_encoderInstPtr, 0) < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  } else if (encoder_exist_) {
+    if (WebRtcGSMFR_EncoderInit(encoder_inst_ptr_, 0) < 0) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "DisableDTX: cannot init encoder for GSMFR");
       return -1;
     }
-    _dtxEnabled = false;
+    dtx_enabled_ = false;
     return 0;
   } else {
     // encoder doesn't exists, therefore disabling is harmless
@@ -171,29 +172,30 @@
   }
 }
 
-WebRtc_Word16 ACMGSMFR::InternalInitEncoder(WebRtcACMCodecParams* codecParams) {
-  if (WebRtcGSMFR_EncoderInit(_encoderInstPtr,
-                              ((codecParams->enableDTX) ? 1 : 0)) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+WebRtc_Word16 ACMGSMFR::InternalInitEncoder(
+    WebRtcACMCodecParams* codec_params) {
+  if (WebRtcGSMFR_EncoderInit(encoder_inst_ptr_,
+                              ((codec_params->enable_dtx) ? 1 : 0)) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalInitEncoder: cannot init encoder for GSMFR");
   }
   return 0;
 }
 
 WebRtc_Word16 ACMGSMFR::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
-  if (WebRtcGSMFR_DecoderInit(_decoderInstPtr) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WebRtcACMCodecParams* /* codec_params */) {
+  if (WebRtcGSMFR_DecoderInit(decoder_inst_ptr_) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalInitDecoder: cannot init decoder for GSMFR");
     return -1;
   }
   return 0;
 }
 
-WebRtc_Word32 ACMGSMFR::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                 const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+WebRtc_Word32 ACMGSMFR::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                 const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "CodecDef: decoder is not initialized for GSMFR");
     return -1;
   }
@@ -201,9 +203,9 @@
   // "SET_CODEC_PAR" & "SET_GSMFR_FUNCTION."
   // Then call NetEQ to add the codec to it's
   // database.
-  SET_CODEC_PAR((codecDef), kDecoderGSMFR, codecInst.pltype, _decoderInstPtr,
-                8000);
-  SET_GSMFR_FUNCTIONS((codecDef));
+  SET_CODEC_PAR((codec_def), kDecoderGSMFR, codec_inst.pltype,
+                decoder_inst_ptr_, 8000);
+  SET_GSMFR_FUNCTIONS((codec_def));
   return 0;
 }
 
@@ -212,44 +214,46 @@
 }
 
 WebRtc_Word16 ACMGSMFR::InternalCreateEncoder() {
-  if (WebRtcGSMFR_CreateEnc(&_encoderInstPtr) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
-        "InternalCreateEncoder: cannot create instance for GSMFR encoder");
+  if (WebRtcGSMFR_CreateEnc(&encoder_inst_ptr_) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
+                 "InternalCreateEncoder: cannot create instance for GSMFR "
+                 "encoder");
     return -1;
   }
   return 0;
 }
 
 void ACMGSMFR::DestructEncoderSafe() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcGSMFR_FreeEnc(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcGSMFR_FreeEnc(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
-  _encoderExist = false;
-  _encoderInitialized = false;
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
 }
 
 WebRtc_Word16 ACMGSMFR::InternalCreateDecoder() {
-  if (WebRtcGSMFR_CreateDec(&_decoderInstPtr) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
-        "InternalCreateDecoder: cannot create instance for GSMFR decoder");
+  if (WebRtcGSMFR_CreateDec(&decoder_inst_ptr_) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
+                 "InternalCreateDecoder: cannot create instance for GSMFR "
+                 "decoder");
     return -1;
   }
   return 0;
 }
 
 void ACMGSMFR::DestructDecoderSafe() {
-  if (_decoderInstPtr != NULL) {
-    WebRtcGSMFR_FreeDec(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcGSMFR_FreeDec(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
-  _decoderExist = false;
-  _decoderInitialized = false;
+  decoder_exist_ = false;
+  decoder_initialized_ = false;
 }
 
-void ACMGSMFR::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    WebRtcGSMFR_FreeEnc((GSMFR_encinst_t_*) ptrInst);
+void ACMGSMFR::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    WebRtcGSMFR_FreeEnc((GSMFR_encinst_t_*) ptr_inst);
   }
   return;
 }
diff --git a/webrtc/modules/audio_coding/main/source/acm_gsmfr.h b/webrtc/modules/audio_coding/main/source/acm_gsmfr.h
index 370d85e..b841711 100644
--- a/webrtc/modules/audio_coding/main/source/acm_gsmfr.h
+++ b/webrtc/modules/audio_coding/main/source/acm_gsmfr.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_GSMFR_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_GSMFR_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 // forward declaration
 struct GSMFR_encinst_t_;
@@ -21,27 +21,28 @@
 
 class ACMGSMFR : public ACMGenericCodec {
  public:
-  ACMGSMFR(WebRtc_Word16 codecID);
+  explicit ACMGSMFR(WebRtc_Word16 codec_id);
   ~ACMGSMFR();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
                            WebRtc_Word16* audio,
-                           WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+                           WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -51,14 +52,14 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   WebRtc_Word16 EnableDTX();
 
   WebRtc_Word16 DisableDTX();
 
-  GSMFR_encinst_t_* _encoderInstPtr;
-  GSMFR_decinst_t_* _decoderInstPtr;
+  GSMFR_encinst_t_* encoder_inst_ptr_;
+  GSMFR_decinst_t_* decoder_inst_ptr_;
 };
 
 }  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_ilbc.cc b/webrtc/modules/audio_coding/main/source/acm_ilbc.cc
index 53f0019..963201b 100644
--- a/webrtc/modules/audio_coding/main/source/acm_ilbc.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_ilbc.cc
@@ -7,25 +7,25 @@
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
+#include "webrtc/modules/audio_coding/main/source/acm_ilbc.h"
 
-#include "acm_common_defs.h"
-#include "acm_ilbc.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 #ifdef WEBRTC_CODEC_ILBC
-#include "ilbc.h"
+#include "webrtc/modules/audio_coding/codecs/ilbc/interface/ilbc.h"
 #endif
 
 namespace webrtc {
 
 #ifndef WEBRTC_CODEC_ILBC
 
-ACMILBC::ACMILBC(WebRtc_Word16 /* codecID */)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL) {
+ACMILBC::ACMILBC(WebRtc_Word16 /* codec_id */)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL) {
   return;
 }
 
@@ -33,31 +33,32 @@
   return;
 }
 
-WebRtc_Word16 ACMILBC::InternalEncode(WebRtc_UWord8* /* bitStream */,
-                                      WebRtc_Word16* /* bitStreamLenByte */) {
+WebRtc_Word16 ACMILBC::InternalEncode(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
-WebRtc_Word16 ACMILBC::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                  WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMILBC::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                  WebRtc_Word16 /* bitstream_len_byte */,
                                   WebRtc_Word16* /* audio */,
-                                  WebRtc_Word16* /* audioSamples */,
-                                  WebRtc_Word8* /* speechType */) {
+                                  WebRtc_Word16* /* audio_samples */,
+                                  WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
 WebRtc_Word16 ACMILBC::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMILBC::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-WebRtc_Word32 ACMILBC::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef  */,
-                                const CodecInst& /* codecInst */) {
+WebRtc_Word32 ACMILBC::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def  */,
+                                const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -81,7 +82,7 @@
   return;
 }
 
-void ACMILBC::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMILBC::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
@@ -91,88 +92,88 @@
 
 #else  //===================== Actual Implementation =======================
 
-ACMILBC::ACMILBC(WebRtc_Word16 codecID)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL) {
-  _codecID = codecID;
+ACMILBC::ACMILBC(WebRtc_Word16 codec_id)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL) {
+  codec_id_ = codec_id;
   return;
 }
 
 ACMILBC::~ACMILBC() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcIlbcfix_EncoderFree(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcIlbcfix_EncoderFree(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
-  if (_decoderInstPtr != NULL) {
-    WebRtcIlbcfix_DecoderFree(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcIlbcfix_DecoderFree(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
   return;
 }
 
-WebRtc_Word16 ACMILBC::InternalEncode(WebRtc_UWord8* bitStream,
-                                      WebRtc_Word16* bitStreamLenByte) {
-  *bitStreamLenByte = WebRtcIlbcfix_Encode(_encoderInstPtr,
-                                           &_inAudio[_inAudioIxRead],
-                                           _frameLenSmpl,
-                                           (WebRtc_Word16*) bitStream);
-  if (*bitStreamLenByte < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+WebRtc_Word16 ACMILBC::InternalEncode(WebRtc_UWord8* bitstream,
+                                      WebRtc_Word16* bitstream_len_byte) {
+  *bitstream_len_byte = WebRtcIlbcfix_Encode(encoder_inst_ptr_,
+                                             &in_audio_[in_audio_ix_read_],
+                                             frame_len_smpl_,
+                                             (WebRtc_Word16*)bitstream);
+  if (*bitstream_len_byte < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalEncode: error in encode for ILBC");
     return -1;
   }
   // increment the read index this tell the caller that how far
   // we have gone forward in reading the audio buffer
-  _inAudioIxRead += _frameLenSmpl;
-  return *bitStreamLenByte;
+  in_audio_ix_read_ += frame_len_smpl_;
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMILBC::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                  WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMILBC::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                  WebRtc_Word16 /* bitstream_len_byte */,
                                   WebRtc_Word16* /* audio */,
-                                  WebRtc_Word16* /* audioSamples */,
-                                  WebRtc_Word8* /* speechType */) {
+                                  WebRtc_Word16* /* audio_samples */,
+                                  WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
-WebRtc_Word16 ACMILBC::InternalInitEncoder(WebRtcACMCodecParams* codecParams) {
+WebRtc_Word16 ACMILBC::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
   // initialize with a correct processing block length
-  if ((160 == (codecParams->codecInstant).pacsize) ||
-      (320 == (codecParams->codecInstant).pacsize)) {
+  if ((160 == (codec_params->codec_inst).pacsize) ||
+      (320 == (codec_params->codec_inst).pacsize)) {
     // processing block of 20ms
-    return WebRtcIlbcfix_EncoderInit(_encoderInstPtr, 20);
-  } else if ((240 == (codecParams->codecInstant).pacsize) ||
-      (480 == (codecParams->codecInstant).pacsize)) {
+    return WebRtcIlbcfix_EncoderInit(encoder_inst_ptr_, 20);
+  } else if ((240 == (codec_params->codec_inst).pacsize) ||
+      (480 == (codec_params->codec_inst).pacsize)) {
     // processing block of 30ms
-    return WebRtcIlbcfix_EncoderInit(_encoderInstPtr, 30);
+    return WebRtcIlbcfix_EncoderInit(encoder_inst_ptr_, 30);
   } else {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalInitEncoder: invalid processing block");
     return -1;
   }
 }
 
-WebRtc_Word16 ACMILBC::InternalInitDecoder(WebRtcACMCodecParams* codecParams) {
+WebRtc_Word16 ACMILBC::InternalInitDecoder(WebRtcACMCodecParams* codec_params) {
   // initialize with a correct processing block length
-  if ((160 == (codecParams->codecInstant).pacsize) ||
-      (320 == (codecParams->codecInstant).pacsize)) {
+  if ((160 == (codec_params->codec_inst).pacsize) ||
+      (320 == (codec_params->codec_inst).pacsize)) {
     // processing block of 20ms
-    return WebRtcIlbcfix_DecoderInit(_decoderInstPtr, 20);
-  } else if ((240 == (codecParams->codecInstant).pacsize) ||
-      (480 == (codecParams->codecInstant).pacsize)) {
+    return WebRtcIlbcfix_DecoderInit(decoder_inst_ptr_, 20);
+  } else if ((240 == (codec_params->codec_inst).pacsize) ||
+      (480 == (codec_params->codec_inst).pacsize)) {
     // processing block of 30ms
-    return WebRtcIlbcfix_DecoderInit(_decoderInstPtr, 30);
+    return WebRtcIlbcfix_DecoderInit(decoder_inst_ptr_, 30);
   } else {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalInitDecoder: invalid processing block");
     return -1;
   }
 }
 
-WebRtc_Word32 ACMILBC::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+WebRtc_Word32 ACMILBC::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "CodeDef: decoder not initialized for ILBC");
     return -1;
   }
@@ -180,9 +181,9 @@
   // "SET_CODEC_PAR" & "SET_ILBC_FUNCTION."
   // Then return the structure back to NetEQ to add the codec to it's
   // database.
-  SET_CODEC_PAR((codecDef), kDecoderILBC, codecInst.pltype, _decoderInstPtr,
+  SET_CODEC_PAR((codec_def), kDecoderILBC, codec_inst.pltype, decoder_inst_ptr_,
                 8000);
-  SET_ILBC_FUNCTIONS((codecDef));
+  SET_ILBC_FUNCTIONS((codec_def));
   return 0;
 }
 
@@ -191,44 +192,46 @@
 }
 
 WebRtc_Word16 ACMILBC::InternalCreateEncoder() {
-  if (WebRtcIlbcfix_EncoderCreate(&_encoderInstPtr) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
-        "InternalCreateEncoder: cannot create instance for ILBC encoder");
+  if (WebRtcIlbcfix_EncoderCreate(&encoder_inst_ptr_) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
+                 "InternalCreateEncoder: cannot create instance for ILBC "
+                 "encoder");
     return -1;
   }
   return 0;
 }
 
 void ACMILBC::DestructEncoderSafe() {
-  _encoderInitialized = false;
-  _encoderExist = false;
-  if (_encoderInstPtr != NULL) {
-    WebRtcIlbcfix_EncoderFree(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  encoder_initialized_ = false;
+  encoder_exist_ = false;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcIlbcfix_EncoderFree(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
 }
 
 WebRtc_Word16 ACMILBC::InternalCreateDecoder() {
-  if (WebRtcIlbcfix_DecoderCreate(&_decoderInstPtr) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
-        "InternalCreateDecoder: cannot create instance for ILBC decoder");
+  if (WebRtcIlbcfix_DecoderCreate(&decoder_inst_ptr_) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
+                 "InternalCreateDecoder: cannot create instance for ILBC "
+                 "decoder");
     return -1;
   }
   return 0;
 }
 
 void ACMILBC::DestructDecoderSafe() {
-  _decoderInitialized = false;
-  _decoderExist = false;
-  if (_decoderInstPtr != NULL) {
-    WebRtcIlbcfix_DecoderFree(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  decoder_initialized_ = false;
+  decoder_exist_ = false;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcIlbcfix_DecoderFree(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
 }
 
-void ACMILBC::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    WebRtcIlbcfix_EncoderFree((iLBC_encinst_t_*) ptrInst);
+void ACMILBC::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    WebRtcIlbcfix_EncoderFree((iLBC_encinst_t_*) ptr_inst);
   }
   return;
 }
@@ -236,13 +239,13 @@
 WebRtc_Word16 ACMILBC::SetBitRateSafe(const WebRtc_Word32 rate) {
   // Check that rate is valid. No need to store the value
   if (rate == 13300) {
-    WebRtcIlbcfix_EncoderInit(_encoderInstPtr, 30);
+    WebRtcIlbcfix_EncoderInit(encoder_inst_ptr_, 30);
   } else if (rate == 15200) {
-    WebRtcIlbcfix_EncoderInit(_encoderInstPtr, 20);
+    WebRtcIlbcfix_EncoderInit(encoder_inst_ptr_, 20);
   } else {
     return -1;
   }
-  _encoderParams.codecInstant.rate = rate;
+  encoder_params_.codec_inst.rate = rate;
 
   return 0;
 }
diff --git a/webrtc/modules/audio_coding/main/source/acm_ilbc.h b/webrtc/modules/audio_coding/main/source/acm_ilbc.h
index c7d4466..a61e34e 100644
--- a/webrtc/modules/audio_coding/main/source/acm_ilbc.h
+++ b/webrtc/modules/audio_coding/main/source/acm_ilbc.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_ILBC_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_ILBC_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 // forward declaration
 struct iLBC_encinst_t_;
@@ -21,27 +21,28 @@
 
 class ACMILBC : public ACMGenericCodec {
  public:
-  ACMILBC(WebRtc_Word16 codecID);
+  explicit ACMILBC(WebRtc_Word16 codec_id);
   ~ACMILBC();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
                            WebRtc_Word16* audio,
-                           WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+                           WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   WebRtc_Word16 SetBitRateSafe(const WebRtc_Word32 rate);
 
@@ -53,10 +54,10 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
-  iLBC_encinst_t_* _encoderInstPtr;
-  iLBC_decinst_t_* _decoderInstPtr;
+  iLBC_encinst_t_* encoder_inst_ptr_;
+  iLBC_decinst_t_* decoder_inst_ptr_;
 };
 
 }  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_isac.cc b/webrtc/modules/audio_coding/main/source/acm_isac.cc
index 052251e..defcb8b 100644
--- a/webrtc/modules/audio_coding/main/source/acm_isac.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_isac.cc
@@ -7,23 +7,23 @@
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
+#include "webrtc/modules/audio_coding/main/source/acm_isac.h"
 
-#include "acm_codec_database.h"
-#include "acm_common_defs.h"
-#include "acm_isac.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 #ifdef WEBRTC_CODEC_ISAC
-#include "acm_isac_macros.h"
-#include "isac.h"
+#include "webrtc/modules/audio_coding/codecs/isac/main/interface/isac.h"
+#include "webrtc/modules/audio_coding/main/source/acm_isac_macros.h"
 #endif
 
 #ifdef WEBRTC_CODEC_ISACFX
-#include "acm_isac_macros.h"
-#include "isacfix.h"
+#include "webrtc/modules/audio_coding/codecs/isac/fix/interface/isacfix.h"
+#include "webrtc/modules/audio_coding/main/source/acm_isac_macros.h"
 #endif
 
 namespace webrtc {
@@ -39,6 +39,194 @@
 #define ISAC_MIN_RATE 10000
 #define ISAC_MAX_RATE 56000
 
+// Tables for bandwidth estimates
+#define NR_ISAC_BANDWIDTHS 24
+static const WebRtc_Word32 kIsacRatesWb[NR_ISAC_BANDWIDTHS] = {
+    10000, 11100, 12300, 13700, 15200, 16900,
+    18800, 20900, 23300, 25900, 28700, 31900,
+    10100, 11200, 12400, 13800, 15300, 17000,
+    18900, 21000, 23400, 26000, 28800, 32000
+};
+
+static const WebRtc_Word32 kIsacRatesSwb[NR_ISAC_BANDWIDTHS] = {
+    10000, 11000, 12400, 13800, 15300, 17000,
+    18900, 21000, 23200, 25400, 27600, 29800,
+    32000, 34100, 36300, 38500, 40700, 42900,
+    45100, 47300, 49500, 51700, 53900, 56000,
+};
+
+#if (!defined(WEBRTC_CODEC_ISAC) && !defined(WEBRTC_CODEC_ISACFX))
+
+ACMISAC::ACMISAC(WebRtc_Word16 /* codec_id */)
+    : codec_inst_ptr_(NULL),
+      is_enc_initialized_(false),
+      isac_coding_mode_(CHANNEL_INDEPENDENT),
+      enforce_frame_size_(false),
+      isac_currentBN_(32000),
+      samples_in10MsAudio_(160) {  // Initiates to 16 kHz mode.
+  // Initiate decoder parameters for the 32 kHz mode.
+  memset(&decoder_params32kHz_, 0, sizeof(WebRtcACMCodecParams));
+  decoder_params32kHz_.codec_inst.pltype = -1;
+
+  return;
+}
+
+ACMISAC::~ACMISAC() {
+  return;
+}
+
+ACMGenericCodec* ACMISAC::CreateInstance(void) {
+  return NULL;
+}
+
+WebRtc_Word16 ACMISAC::InternalEncode(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
+  return -1;
+}
+
+WebRtc_Word16 ACMISAC::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                  WebRtc_Word16 /* bitstream_len_byte */,
+                                  WebRtc_Word16* /* audio */,
+                                  WebRtc_Word16* /* audio_samples */,
+                                  WebRtc_Word8* /* speech_type */) {
+  return 0;
+}
+
+WebRtc_Word16 ACMISAC::InternalInitEncoder(
+    WebRtcACMCodecParams* /* codec_params */) {
+  return -1;
+}
+
+WebRtc_Word16 ACMISAC::InternalInitDecoder(
+    WebRtcACMCodecParams* /* codec_params */) {
+  return -1;
+}
+
+WebRtc_Word16 ACMISAC::InternalCreateDecoder() {
+  return -1;
+}
+
+void ACMISAC::DestructDecoderSafe() {
+  return;
+}
+
+WebRtc_Word16 ACMISAC::InternalCreateEncoder() {
+  return -1;
+}
+
+void ACMISAC::DestructEncoderSafe() {
+  return;
+}
+
+WebRtc_Word32 ACMISAC::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def */,
+                                const CodecInst& /* codec_inst */) {
+  return -1;
+}
+
+void ACMISAC::InternalDestructEncoderInst(void* /* ptr_inst */) {
+  return;
+}
+
+WebRtc_Word16 ACMISAC::DeliverCachedIsacData(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */,
+    WebRtc_UWord32* /* timestamp */,
+    WebRtcACMEncodingType* /* encoding_type */,
+    const WebRtc_UWord16 /* isac_rate */,
+    const WebRtc_UWord8 /* isac_bw_estimate */) {
+  return -1;
+}
+
+WebRtc_Word16 ACMISAC::Transcode(WebRtc_UWord8* /* bitstream */,
+                                 WebRtc_Word16* /* bitstream_len_byte */,
+                                 WebRtc_Word16 /* q_bwe */,
+                                 WebRtc_Word32 /* scale */,
+                                 bool /* is_red */) {
+  return -1;
+}
+
+WebRtc_Word16 ACMISAC::SetBitRateSafe(WebRtc_Word32 /* bit_rate */) {
+  return -1;
+}
+
+WebRtc_Word32 ACMISAC::GetEstimatedBandwidthSafe() {
+  return -1;
+}
+
+WebRtc_Word32 ACMISAC::SetEstimatedBandwidthSafe(
+    WebRtc_Word32 /* estimated_bandwidth */) {
+  return -1;
+}
+
+WebRtc_Word32 ACMISAC::GetRedPayloadSafe(WebRtc_UWord8* /* red_payload */,
+                                         WebRtc_Word16* /* payload_bytes */) {
+  return -1;
+}
+
+WebRtc_Word16 ACMISAC::UpdateDecoderSampFreq(WebRtc_Word16 /* codec_id */) {
+  return -1;
+}
+
+WebRtc_Word16 ACMISAC::UpdateEncoderSampFreq(
+    WebRtc_UWord16 /* encoder_samp_freq_hz */) {
+  return -1;
+}
+
+WebRtc_Word16 ACMISAC::EncoderSampFreq(WebRtc_UWord16& /* samp_freq_hz */) {
+  return -1;
+}
+
+WebRtc_Word32 ACMISAC::ConfigISACBandwidthEstimator(
+    const WebRtc_UWord8 /* init_frame_size_msec */,
+    const WebRtc_UWord16 /* init_rate_bit_per_sec */,
+    const bool /* enforce_frame_size  */) {
+  return -1;
+}
+
+WebRtc_Word32 ACMISAC::SetISACMaxPayloadSize(
+    const WebRtc_UWord16 /* max_payload_len_bytes */) {
+  return -1;
+}
+
+WebRtc_Word32 ACMISAC::SetISACMaxRate(
+    const WebRtc_UWord32 /* max_rate_bit_per_sec */) {
+  return -1;
+}
+
+void ACMISAC::UpdateFrameLen() {
+  return;
+}
+
+void ACMISAC::CurrentRate(WebRtc_Word32& /*rate_bit_per_sec */) {
+  return;
+}
+
+bool
+ACMISAC::DecoderParamsSafe(
+    WebRtcACMCodecParams* /* dec_params */,
+    const WebRtc_UWord8   /* payload_type */) {
+  return false;
+}
+
+void
+ACMISAC::SaveDecoderParamSafe(
+    const WebRtcACMCodecParams* /* codec_params */) {
+  return;
+}
+
+WebRtc_Word16 ACMISAC::REDPayloadISAC(
+    const WebRtc_Word32 /* isac_rate */,
+    const WebRtc_Word16 /* isac_bw_estimate */,
+    WebRtc_UWord8* /* payload */,
+    WebRtc_Word16* /* payload_len_bytes */) {
+  return -1;
+}
+
+#else     //===================== Actual Implementation =======================
+
+#ifdef WEBRTC_CODEC_ISACFX
+
 // How the scaling is computed. iSAC computes a gain based on the
 // bottleneck. It follows the following expression for that
 //
@@ -54,209 +242,29 @@
 // S(BN_kbps) = G(BN_kbps) / G(32);
 
 #define ISAC_NUM_SUPPORTED_RATES 9
-const WebRtc_UWord16 isacSuportedRates[ISAC_NUM_SUPPORTED_RATES] = {
+
+static const WebRtc_UWord16 kIsacSuportedRates[ISAC_NUM_SUPPORTED_RATES] = {
     32000,    30000,    26000,   23000,   21000,
     19000,    17000,   15000,    12000
 };
 
-const float isacScale[ISAC_NUM_SUPPORTED_RATES] = {
-     1.0f,    0.8954f,  0.7178f, 0.6081f, 0.5445f,
-     0.4875f, 0.4365f,  0.3908f, 0.3311f
+static const float kIsacScale[ISAC_NUM_SUPPORTED_RATES] = {
+    1.0f,    0.8954f,  0.7178f, 0.6081f, 0.5445f,
+    0.4875f, 0.4365f,  0.3908f, 0.3311f
 };
 
-// Tables for bandwidth estimates
-#define NR_ISAC_BANDWIDTHS 24
-const WebRtc_Word32 isacRatesWB[NR_ISAC_BANDWIDTHS] = {
-    10000, 11100, 12300, 13700, 15200, 16900,
-    18800, 20900, 23300, 25900, 28700, 31900,
-    10100, 11200, 12400, 13800, 15300, 17000,
-    18900, 21000, 23400, 26000, 28800, 32000
+enum IsacSamplingRate {
+  kIsacWideband = 16,
+  kIsacSuperWideband = 32
 };
 
-const WebRtc_Word32 isacRatesSWB[NR_ISAC_BANDWIDTHS] = {
-    10000, 11000, 12400, 13800, 15300, 17000,
-    18900, 21000, 23200, 25400, 27600, 29800,
-    32000, 34100, 36300, 38500, 40700, 42900,
-    45100, 47300, 49500, 51700, 53900, 56000,
-};
-
-#if (!defined(WEBRTC_CODEC_ISAC) && !defined(WEBRTC_CODEC_ISACFX))
-
-ACMISAC::ACMISAC(WebRtc_Word16 /* codecID */)
-    : _codecInstPtr(NULL),
-      _isEncInitialized(false),
-      _isacCodingMode(CHANNEL_INDEPENDENT),
-      _enforceFrameSize(false),
-      _isacCurrentBN(32000),
-      _samplesIn10MsAudio(160) {  // Initiates to 16 kHz mode.
-  // Initiate decoder parameters for the 32 kHz mode.
-  memset(&_decoderParams32kHz, 0, sizeof(WebRtcACMCodecParams));
-  _decoderParams32kHz.codecInstant.pltype = -1;
-
-  return;
-}
-
-ACMISAC::~ACMISAC() {
-  return;
-}
-
-ACMGenericCodec* ACMISAC::CreateInstance(void) {
-  return NULL;
-}
-
-WebRtc_Word16 ACMISAC::InternalEncode(WebRtc_UWord8* /* bitstream */,
-                                      WebRtc_Word16* /* bitStreamLenByte */) {
-  return -1;
-}
-
-WebRtc_Word16 ACMISAC::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                  WebRtc_Word16 /* bitStreamLenByte */,
-                                  WebRtc_Word16* /* audio */,
-                                  WebRtc_Word16* /* audioSamples */,
-                                  WebRtc_Word8* /* speechType */) {
-  return 0;
-}
-
-WebRtc_Word16 ACMISAC::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
-  return -1;
-}
-
-WebRtc_Word16 ACMISAC::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
-  return -1;
-}
-
-WebRtc_Word16 ACMISAC::InternalCreateDecoder() {
-  return -1;
-}
-
-void ACMISAC::DestructDecoderSafe() {
-  return;
-}
-
-WebRtc_Word16 ACMISAC::InternalCreateEncoder() {
-  return -1;
-}
-
-void ACMISAC::DestructEncoderSafe() {
-  return;
-}
-
-WebRtc_Word32 ACMISAC::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef */,
-                                const CodecInst& /* codecInst */) {
-  return -1;
-}
-
-void ACMISAC::InternalDestructEncoderInst(void* /* ptrInst */) {
-  return;
-}
-
-WebRtc_Word16 ACMISAC::DeliverCachedIsacData(
-    WebRtc_UWord8* /* bitStream */, WebRtc_Word16* /* bitStreamLenByte */,
-    WebRtc_UWord32* /* timestamp */, WebRtcACMEncodingType* /* encodingType */,
-    const WebRtc_UWord16 /* isacRate */,
-    const WebRtc_UWord8 /* isacBWestimate */) {
-  return -1;
-}
-
-WebRtc_Word16 ACMISAC::Transcode(WebRtc_UWord8* /* bitStream */,
-                                 WebRtc_Word16* /* bitStreamLenByte */,
-                                 WebRtc_Word16 /* qBWE */,
-                                 WebRtc_Word32 /* scale */,
-                                 bool /* isRED */) {
-  return -1;
-}
-
-WebRtc_Word16 ACMISAC::SetBitRateSafe(WebRtc_Word32 /* bitRate */) {
-  return -1;
-}
-
-WebRtc_Word32 ACMISAC::GetEstimatedBandwidthSafe() {
-  return -1;
-}
-
-WebRtc_Word32 ACMISAC::SetEstimatedBandwidthSafe(
-    WebRtc_Word32 /* estimatedBandwidth */) {
-  return -1;
-}
-
-WebRtc_Word32 ACMISAC::GetRedPayloadSafe(WebRtc_UWord8* /* redPayload */,
-                                         WebRtc_Word16* /* payloadBytes */) {
-  return -1;
-}
-
-WebRtc_Word16 ACMISAC::UpdateDecoderSampFreq(WebRtc_Word16 /* codecId */) {
-  return -1;
-}
-
-WebRtc_Word16 ACMISAC::UpdateEncoderSampFreq(
-    WebRtc_UWord16 /* encoderSampFreqHz */) {
-  return -1;
-}
-
-WebRtc_Word16 ACMISAC::EncoderSampFreq(WebRtc_UWord16& /* sampFreqHz */) {
-  return -1;
-}
-
-WebRtc_Word32 ACMISAC::ConfigISACBandwidthEstimator(
-    const WebRtc_UWord8 /* initFrameSizeMsec */,
-    const WebRtc_UWord16 /* initRateBitPerSec */,
-    const bool /* enforceFrameSize  */) {
-  return -1;
-}
-
-WebRtc_Word32 ACMISAC::SetISACMaxPayloadSize(
-    const WebRtc_UWord16 /* maxPayloadLenBytes */) {
-  return -1;
-}
-
-WebRtc_Word32 ACMISAC::SetISACMaxRate(
-    const WebRtc_UWord32 /* maxRateBitPerSec */) {
-  return -1;
-}
-
-void ACMISAC::UpdateFrameLen() {
-  return;
-}
-
-void ACMISAC::CurrentRate(WebRtc_Word32& /*rateBitPerSec */) {
-  return;
-}
-
-bool
-ACMISAC::DecoderParamsSafe(
-    WebRtcACMCodecParams* /* decParams */,
-    const WebRtc_UWord8   /* payloadType */)
-{
-    return false;
-}
-
-void
-ACMISAC::SaveDecoderParamSafe(
-    const WebRtcACMCodecParams* /* codecParams */)
-{
-    return;
-}
-
-WebRtc_Word16 ACMISAC::REDPayloadISAC(const WebRtc_Word32 /* isacRate */,
-                                      const WebRtc_Word16 /* isacBwEstimate */,
-                                      WebRtc_UWord8* /* payload */,
-                                      WebRtc_Word16* /* payloadLenBytes */) {
-  return -1;
-}
-
-#else     //===================== Actual Implementation =======================
-
-#ifdef WEBRTC_CODEC_ISACFX
-
 static float ACMISACFixTranscodingScale(WebRtc_UWord16 rate) {
   // find the scale for transcoding, the scale is rounded
   // downward
   float scale = -1;
   for (WebRtc_Word16 n = 0; n < ISAC_NUM_SUPPORTED_RATES; n++) {
-    if (rate >= isacSuportedRates[n]) {
-      scale = isacScale[n];
+    if (rate >= kIsacSuportedRates[n]) {
+      scale = kIsacScale[n];
       break;
     }
   }
@@ -264,50 +272,50 @@
 }
 
 static void ACMISACFixGetSendBitrate(ACM_ISAC_STRUCT* inst,
-                                     WebRtc_Word32* bottleNeck) {
-  *bottleNeck = WebRtcIsacfix_GetUplinkBw(inst);
+                                     WebRtc_Word32* bottleneck) {
+  *bottleneck = WebRtcIsacfix_GetUplinkBw(inst);
 }
 
 static WebRtc_Word16 ACMISACFixGetNewBitstream(ACM_ISAC_STRUCT* inst,
-                                               WebRtc_Word16 BWEIndex,
-                                               WebRtc_Word16 /* jitterIndex */,
+                                               WebRtc_Word16 bwe_index,
+                                               WebRtc_Word16 /* jitter_index */,
                                                WebRtc_Word32 rate,
-                                               WebRtc_Word16* bitStream,
-                                               bool isRED) {
-  if (isRED) {
+                                               WebRtc_Word16* bitstream,
+                                               bool is_red) {
+  if (is_red) {
     // RED not supported with iSACFIX
     return -1;
   }
   float scale = ACMISACFixTranscodingScale((WebRtc_UWord16) rate);
-  return WebRtcIsacfix_GetNewBitStream(inst, BWEIndex, scale, bitStream);
+  return WebRtcIsacfix_GetNewBitStream(inst, bwe_index, scale, bitstream);
 }
 
 static WebRtc_Word16 ACMISACFixGetSendBWE(ACM_ISAC_STRUCT* inst,
-                                          WebRtc_Word16* rateIndex,
+                                          WebRtc_Word16* rate_index,
                                           WebRtc_Word16* /* dummy */) {
-  WebRtc_Word16 localRateIndex;
+  WebRtc_Word16 local_rate_index;
   WebRtc_Word16 status = WebRtcIsacfix_GetDownLinkBwIndex(inst,
-                                                          &localRateIndex);
+                                                          &local_rate_index);
   if (status < 0) {
     return -1;
   } else {
-    *rateIndex = localRateIndex;
+    *rate_index = local_rate_index;
     return 0;
   }
 }
 
 static WebRtc_Word16 ACMISACFixControlBWE(ACM_ISAC_STRUCT* inst,
-                                          WebRtc_Word32 rateBPS,
-                                          WebRtc_Word16 frameSizeMs,
-                                          WebRtc_Word16 enforceFrameSize) {
-  return WebRtcIsacfix_ControlBwe(inst, (WebRtc_Word16) rateBPS, frameSizeMs,
-                                  enforceFrameSize);
+                                          WebRtc_Word32 rate_bps,
+                                          WebRtc_Word16 frame_size_ms,
+                                          WebRtc_Word16 enforce_frame_size) {
+  return WebRtcIsacfix_ControlBwe(inst, (WebRtc_Word16) rate_bps, frame_size_ms,
+                                  enforce_frame_size);
 }
 
 static WebRtc_Word16 ACMISACFixControl(ACM_ISAC_STRUCT* inst,
-                                       WebRtc_Word32 rateBPS,
-                                       WebRtc_Word16 frameSizeMs) {
-  return WebRtcIsacfix_Control(inst, (WebRtc_Word16) rateBPS, frameSizeMs);
+                                       WebRtc_Word32 rate_bps,
+                                       WebRtc_Word16 frame_size_ms) {
+  return WebRtcIsacfix_Control(inst, (WebRtc_Word16) rate_bps, frame_size_ms);
 }
 
 // The following two function should have the same signature as their counter
@@ -323,39 +331,39 @@
 
 #endif
 
-ACMISAC::ACMISAC(WebRtc_Word16 codecID)
-    : _isEncInitialized(false),
-      _isacCodingMode(CHANNEL_INDEPENDENT),
-      _enforceFrameSize(false),
-      _isacCurrentBN(32000),
-      _samplesIn10MsAudio(160) {  // Initiates to 16 kHz mode.
-  _codecID = codecID;
+ACMISAC::ACMISAC(WebRtc_Word16 codec_id)
+    : is_enc_initialized_(false),
+      isac_coding_mode_(CHANNEL_INDEPENDENT),
+      enforce_frame_size_(false),
+      isac_current_bn_(32000),
+      samples_in_10ms_audio_(160) {  // Initiates to 16 kHz mode.
+  codec_id_ = codec_id;
 
   // Create codec instance.
-  _codecInstPtr = new ACMISACInst;
-  if (_codecInstPtr == NULL) {
+  codec_inst_ptr_ = new ACMISACInst;
+  if (codec_inst_ptr_ == NULL) {
     return;
   }
-  _codecInstPtr->inst = NULL;
+  codec_inst_ptr_->inst = NULL;
 
   // Initiate decoder parameters for the 32 kHz mode.
-  memset(&_decoderParams32kHz, 0, sizeof(WebRtcACMCodecParams));
-  _decoderParams32kHz.codecInstant.pltype = -1;
+  memset(&decoder_params_32khz_, 0, sizeof(WebRtcACMCodecParams));
+  decoder_params_32khz_.codec_inst.pltype = -1;
 
   // TODO(tlegrand): Check if the following is really needed, now that
   // ACMGenericCodec has been updated to initialize this value.
   // Initialize values that can be used uninitialized otherwise
-  _decoderParams.codecInstant.pltype = -1;
+  decoder_params_.codec_inst.pltype = -1;
 }
 
 ACMISAC::~ACMISAC() {
-  if (_codecInstPtr != NULL) {
-    if (_codecInstPtr->inst != NULL) {
-      ACM_ISAC_FREE(_codecInstPtr->inst);
-      _codecInstPtr->inst = NULL;
+  if (codec_inst_ptr_ != NULL) {
+    if (codec_inst_ptr_->inst != NULL) {
+      ACM_ISAC_FREE(codec_inst_ptr_->inst);
+      codec_inst_ptr_->inst = NULL;
     }
-    delete _codecInstPtr;
-    _codecInstPtr = NULL;
+    delete codec_inst_ptr_;
+    codec_inst_ptr_ = NULL;
   }
   return;
 }
@@ -365,7 +373,7 @@
 }
 
 WebRtc_Word16 ACMISAC::InternalEncode(WebRtc_UWord8* bitstream,
-                                      WebRtc_Word16* bitStreamLenByte) {
+                                      WebRtc_Word16* bitstream_len_byte) {
   // ISAC takes 10ms audio everytime we call encoder, therefor,
   // it should be treated like codecs with 'basic coding block'
   // non-zero, and the following 'while-loop' should not be necessary.
@@ -373,98 +381,98 @@
   // at the first 10ms pushed in to iSAC if the bit-rate is low, this is
   // sort of a bug in iSAC. to address this we treat iSAC as the
   // following.
-  if (_codecInstPtr == NULL) {
+  if (codec_inst_ptr_ == NULL) {
     return -1;
   }
-  *bitStreamLenByte = 0;
-  while ((*bitStreamLenByte == 0) && (_inAudioIxRead < _frameLenSmpl)) {
-    if (_inAudioIxRead > _inAudioIxWrite) {
+  *bitstream_len_byte = 0;
+  while ((*bitstream_len_byte == 0) && (in_audio_ix_read_ < frame_len_smpl_)) {
+    if (in_audio_ix_read_ > in_audio_ix_write_) {
       // something is wrong.
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
-          "The actual fram-size of iSAC appears to be larger that expected. "
-          "All audio pushed in but no bit-stream is generated.");
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
+                   "The actual fram-size of iSAC appears to be larger that "
+                   "expected. All audio pushed in but no bit-stream is "
+                   "generated.");
       return -1;
     }
-    *bitStreamLenByte = ACM_ISAC_ENCODE(_codecInstPtr->inst,
-                                        &_inAudio[_inAudioIxRead],
-                                        (WebRtc_Word16*) bitstream);
+    *bitstream_len_byte = ACM_ISAC_ENCODE(codec_inst_ptr_->inst,
+                                           &in_audio_[in_audio_ix_read_],
+                                           (WebRtc_Word16*)bitstream);
     // increment the read index this tell the caller that how far
     // we have gone forward in reading the audio buffer
-    _inAudioIxRead += _samplesIn10MsAudio;
+    in_audio_ix_read_ += samples_in_10ms_audio_;
   }
-  if (*bitStreamLenByte == 0) {
-    WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, _uniqueID,
-        "ISAC Has encoded the whole frame but no bit-stream is generated.");
+  if (*bitstream_len_byte == 0) {
+    WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, unique_id_,
+                 "ISAC Has encoded the whole frame but no bit-stream is "
+                 "generated.");
   }
 
   // a packet is generated iSAC, is set in adaptive mode may change
   // the frame length and we like to update the bottleneck value as
   // well, although updating bottleneck is not crucial
-  if ((*bitStreamLenByte > 0) && (_isacCodingMode == ADAPTIVE)) {
-    //_frameLenSmpl = ACM_ISAC_GETNEWFRAMELEN(_codecInstPtr->inst);
-    ACM_ISAC_GETSENDBITRATE(_codecInstPtr->inst, &_isacCurrentBN);
+  if ((*bitstream_len_byte > 0) && (isac_coding_mode_ == ADAPTIVE)) {
+    ACM_ISAC_GETSENDBITRATE(codec_inst_ptr_->inst, &isac_current_bn_);
   }
   UpdateFrameLen();
-  return *bitStreamLenByte;
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMISAC::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                  WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMISAC::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                  WebRtc_Word16 /* bitstream_len_byte */,
                                   WebRtc_Word16* /* audio */,
-                                  WebRtc_Word16* /* audioSample */,
-                                  WebRtc_Word8* /* speechType */) {
+                                  WebRtc_Word16* /* audio_sample */,
+                                  WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
-WebRtc_Word16 ACMISAC::InternalInitEncoder(WebRtcACMCodecParams* codecParams) {
+WebRtc_Word16 ACMISAC::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
   // if rate is set to -1 then iSAC has to be in adaptive mode
-  if (codecParams->codecInstant.rate == -1) {
-    _isacCodingMode = ADAPTIVE;
-  }
-
-  // sanity check that rate is in acceptable range
-  else if ((codecParams->codecInstant.rate >= ISAC_MIN_RATE) &&
-      (codecParams->codecInstant.rate <= ISAC_MAX_RATE)) {
-    _isacCodingMode = CHANNEL_INDEPENDENT;
-    _isacCurrentBN = codecParams->codecInstant.rate;
+  if (codec_params->codec_inst.rate == -1) {
+    isac_coding_mode_ = ADAPTIVE;
+  } else if ((codec_params->codec_inst.rate >= ISAC_MIN_RATE) &&
+      (codec_params->codec_inst.rate <= ISAC_MAX_RATE)) {
+    // sanity check that rate is in acceptable range
+    isac_coding_mode_ = CHANNEL_INDEPENDENT;
+    isac_current_bn_ = codec_params->codec_inst.rate;
   } else {
     return -1;
   }
 
   // we need to set the encoder sampling frequency.
-  if (UpdateEncoderSampFreq((WebRtc_UWord16) codecParams->codecInstant.plfreq)
+  if (UpdateEncoderSampFreq((WebRtc_UWord16) codec_params->codec_inst.plfreq)
       < 0) {
     return -1;
   }
-  if (ACM_ISAC_ENCODERINIT(_codecInstPtr->inst, _isacCodingMode) < 0) {
+  if (ACM_ISAC_ENCODERINIT(codec_inst_ptr_->inst, isac_coding_mode_) < 0) {
     return -1;
   }
 
   // apply the frame-size and rate if operating in
   // channel-independent mode
-  if (_isacCodingMode == CHANNEL_INDEPENDENT) {
-    if (ACM_ISAC_CONTROL(_codecInstPtr->inst, codecParams->codecInstant.rate,
-        codecParams->codecInstant.pacsize /
-        (codecParams->codecInstant.plfreq / 1000)) < 0) {
+  if (isac_coding_mode_ == CHANNEL_INDEPENDENT) {
+    if (ACM_ISAC_CONTROL(codec_inst_ptr_->inst,
+                         codec_params->codec_inst.rate,
+                         codec_params->codec_inst.pacsize /
+                         (codec_params->codec_inst.plfreq / 1000)) < 0) {
       return -1;
     }
   } else {
     // We need this for adaptive case and has to be called
     // after initialization
-    ACM_ISAC_GETSENDBITRATE(_codecInstPtr->inst, &_isacCurrentBN);
+    ACM_ISAC_GETSENDBITRATE(codec_inst_ptr_->inst, &isac_current_bn_);
   }
-  _frameLenSmpl = ACM_ISAC_GETNEWFRAMELEN(_codecInstPtr->inst);
+  frame_len_smpl_ = ACM_ISAC_GETNEWFRAMELEN(codec_inst_ptr_->inst);
   return 0;
 }
 
-WebRtc_Word16 ACMISAC::InternalInitDecoder(WebRtcACMCodecParams* codecParams) {
-  if (_codecInstPtr == NULL) {
+WebRtc_Word16 ACMISAC::InternalInitDecoder(WebRtcACMCodecParams* codec_params) {
+  if (codec_inst_ptr_ == NULL) {
     return -1;
   }
 
   // set decoder sampling frequency.
-  if (codecParams->codecInstant.plfreq == 32000 ||
-      codecParams->codecInstant.plfreq == 48000) {
+  if (codec_params->codec_inst.plfreq == 32000 ||
+      codec_params->codec_inst.plfreq == 48000) {
     UpdateDecoderSampFreq(ACMCodecDB::kISACSWB);
   } else {
     UpdateDecoderSampFreq(ACMCodecDB::kISAC);
@@ -474,165 +482,165 @@
   // However we like that the BWE to work properly so it has to
   // be initialized. The BWE is initialized when iSAC encoder is initialized.
   // Therefore, we need this.
-  if (!_encoderInitialized) {
+  if (!encoder_initialized_) {
     // Since we don't require a valid rate or a valid packet size when
     // initializing the decoder, we set valid values before initializing encoder
-    codecParams->codecInstant.rate = kIsacWbDefaultRate;
-    codecParams->codecInstant.pacsize = kIsacPacSize960;
-    if (InternalInitEncoder(codecParams) < 0) {
+    codec_params->codec_inst.rate = kIsacWbDefaultRate;
+    codec_params->codec_inst.pacsize = kIsacPacSize960;
+    if (InternalInitEncoder(codec_params) < 0) {
       return -1;
     }
-    _encoderInitialized = true;
+    encoder_initialized_ = true;
   }
 
-  return ACM_ISAC_DECODERINIT(_codecInstPtr->inst);
+  return ACM_ISAC_DECODERINIT(codec_inst_ptr_->inst);
 }
 
 WebRtc_Word16 ACMISAC::InternalCreateDecoder() {
-  if (_codecInstPtr == NULL) {
+  if (codec_inst_ptr_ == NULL) {
     return -1;
   }
-  WebRtc_Word16 status = ACM_ISAC_CREATE(&(_codecInstPtr->inst));
+  WebRtc_Word16 status = ACM_ISAC_CREATE(&(codec_inst_ptr_->inst));
 
   // specific to codecs with one instance for encoding and decoding
-  _encoderInitialized = false;
+  encoder_initialized_ = false;
   if (status < 0) {
-    _encoderExist = false;
+    encoder_exist_ = false;
   } else {
-    _encoderExist = true;
+    encoder_exist_ = true;
   }
   return status;
 }
 
 void ACMISAC::DestructDecoderSafe() {
   // codec with shared instance cannot delete.
-  _decoderInitialized = false;
+  decoder_initialized_ = false;
   return;
 }
 
 WebRtc_Word16 ACMISAC::InternalCreateEncoder() {
-  if (_codecInstPtr == NULL) {
+  if (codec_inst_ptr_ == NULL) {
     return -1;
   }
-  WebRtc_Word16 status = ACM_ISAC_CREATE(&(_codecInstPtr->inst));
+  WebRtc_Word16 status = ACM_ISAC_CREATE(&(codec_inst_ptr_->inst));
 
   // specific to codecs with one instance for encoding and decoding
-  _decoderInitialized = false;
+  decoder_initialized_ = false;
   if (status < 0) {
-    _decoderExist = false;
+    decoder_exist_ = false;
   } else {
-    _decoderExist = true;
+    decoder_exist_ = true;
   }
   return status;
 }
 
 void ACMISAC::DestructEncoderSafe() {
   // codec with shared instance cannot delete.
-  _encoderInitialized = false;
+  encoder_initialized_ = false;
   return;
 }
 
-WebRtc_Word32 ACMISAC::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                const CodecInst& codecInst) {
+WebRtc_Word32 ACMISAC::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                const CodecInst& codec_inst) {
   // Sanity checks
-  if (_codecInstPtr == NULL) {
+  if (codec_inst_ptr_ == NULL) {
     return -1;
   }
-  if (!_decoderInitialized || !_decoderExist) {
+  if (!decoder_initialized_ || !decoder_exist_) {
     return -1;
   }
   // Fill up the structure by calling
   // "SET_CODEC_PAR" & "SET_ISAC_FUNCTION."
   // Then call NetEQ to add the codec to it's
   // database.
-  if (codecInst.plfreq == 16000) {
-    SET_CODEC_PAR((codecDef), kDecoderISAC, codecInst.pltype,
-                  _codecInstPtr->inst, 16000);
+  if (codec_inst.plfreq == 16000) {
+    SET_CODEC_PAR((codec_def), kDecoderISAC, codec_inst.pltype,
+                  codec_inst_ptr_->inst, 16000);
 #ifdef WEBRTC_CODEC_ISAC
-    SET_ISAC_FUNCTIONS((codecDef));
+    SET_ISAC_FUNCTIONS((codec_def));
 #else
-    SET_ISACfix_FUNCTIONS((codecDef));
+    SET_ISACfix_FUNCTIONS((codec_def));
 #endif
   } else {
 #ifdef WEBRTC_CODEC_ISAC
     // Decoder is either @ 16 kHz or 32 kHz. Even if encoder is set @ 48 kHz
     // decoding is @ 32 kHz.
-    if (codecInst.plfreq == 32000) {
-      SET_CODEC_PAR((codecDef), kDecoderISACswb, codecInst.pltype,
-                    _codecInstPtr->inst, 32000);
-      SET_ISACSWB_FUNCTIONS((codecDef));
+    if (codec_inst.plfreq == 32000) {
+      SET_CODEC_PAR((codec_def), kDecoderISACswb, codec_inst.pltype,
+                    codec_inst_ptr_->inst, 32000);
+      SET_ISACSWB_FUNCTIONS((codec_def));
     } else {
-      SET_CODEC_PAR((codecDef), kDecoderISACfb, codecInst.pltype,
-                    _codecInstPtr->inst, 32000);
-      SET_ISACFB_FUNCTIONS((codecDef));
+      SET_CODEC_PAR((codec_def), kDecoderISACfb, codec_inst.pltype,
+                    codec_inst_ptr_->inst, 32000);
+      SET_ISACFB_FUNCTIONS((codec_def));
     }
 #else
-    return -1;
+  return -1;
 #endif
   }
   return 0;
 }
 
-void ACMISAC::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    ACM_ISAC_FREE((ACM_ISAC_STRUCT *) ptrInst);
+void ACMISAC::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    ACM_ISAC_FREE((ACM_ISAC_STRUCT *) ptr_inst);
   }
   return;
 }
 
-WebRtc_Word16 ACMISAC::Transcode(WebRtc_UWord8* bitStream,
-                                 WebRtc_Word16* bitStreamLenByte,
-                                 WebRtc_Word16 qBWE, WebRtc_Word32 rate,
-                                 bool isRED) {
-  WebRtc_Word16 jitterInfo = 0;
+WebRtc_Word16 ACMISAC::Transcode(WebRtc_UWord8* bitstream,
+                                 WebRtc_Word16* bitstream_len_byte,
+                                 WebRtc_Word16 q_bwe,
+                                 WebRtc_Word32 rate,
+                                 bool is_red) {
+  WebRtc_Word16 jitter_info = 0;
   // transcode from a higher rate to lower rate sanity check
-  if (_codecInstPtr == NULL) {
+  if (codec_inst_ptr_ == NULL) {
     return -1;
   }
 
-  *bitStreamLenByte = ACM_ISAC_GETNEWBITSTREAM(_codecInstPtr->inst, qBWE,
-                                               jitterInfo, rate,
-                                               (WebRtc_Word16*) bitStream,
-                                               (isRED) ? 1 : 0);
+  *bitstream_len_byte = ACM_ISAC_GETNEWBITSTREAM(codec_inst_ptr_->inst, q_bwe,
+                                                 jitter_info, rate,
+                                                 (WebRtc_Word16*)bitstream,
+                                                 (is_red) ? 1 : 0);
 
-  if (*bitStreamLenByte < 0) {
+  if (*bitstream_len_byte < 0) {
     // error happened
-    *bitStreamLenByte = 0;
+    *bitstream_len_byte = 0;
     return -1;
   } else {
-    return *bitStreamLenByte;
+    return *bitstream_len_byte;
   }
 }
 
-WebRtc_Word16 ACMISAC::SetBitRateSafe(WebRtc_Word32 bitRate) {
-  if (_codecInstPtr == NULL) {
+WebRtc_Word16 ACMISAC::SetBitRateSafe(WebRtc_Word32 bit_rate) {
+  if (codec_inst_ptr_ == NULL) {
     return -1;
   }
-  WebRtc_UWord16 encoderSampFreq;
-  EncoderSampFreq(encoderSampFreq);
+  WebRtc_UWord16 encoder_samp_freq;
+  EncoderSampFreq(encoder_samp_freq);
   bool reinit = false;
   // change the BN of iSAC
-  if (bitRate == -1) {
+  if (bit_rate == -1) {
     // ADAPTIVE MODE
     // Check if it was already in adaptive mode
-    if (_isacCodingMode != ADAPTIVE) {
+    if (isac_coding_mode_ != ADAPTIVE) {
       // was not in adaptive, then set the mode to adaptive
       // and flag for re-initialization
-      _isacCodingMode = ADAPTIVE;
+      isac_coding_mode_ = ADAPTIVE;
       reinit = true;
     }
-  }
-  // Sanity check if the rate valid
-  else if ((bitRate >= ISAC_MIN_RATE) && (bitRate <= ISAC_MAX_RATE)) {
-    //check if it was in channel-independent mode before
-    if (_isacCodingMode != CHANNEL_INDEPENDENT) {
+  } else if ((bit_rate >= ISAC_MIN_RATE) && (bit_rate <= ISAC_MAX_RATE)) {
+    // Sanity check if the rate valid
+    // check if it was in channel-independent mode before
+    if (isac_coding_mode_ != CHANNEL_INDEPENDENT) {
       // was not in channel independent, set the mode to
       // channel-independent and flag for re-initialization
-      _isacCodingMode = CHANNEL_INDEPENDENT;
+      isac_coding_mode_ = CHANNEL_INDEPENDENT;
       reinit = true;
     }
     // store the bottleneck
-    _isacCurrentBN = (WebRtc_UWord16) bitRate;
+    isac_current_bn_ = (WebRtc_UWord16) bit_rate;
   } else {
     // invlaid rate
     return -1;
@@ -641,243 +649,248 @@
   WebRtc_Word16 status = 0;
   if (reinit) {
     // initialize and check if it is successful
-    if (ACM_ISAC_ENCODERINIT(_codecInstPtr->inst, _isacCodingMode) < 0) {
+    if (ACM_ISAC_ENCODERINIT(codec_inst_ptr_->inst, isac_coding_mode_) < 0) {
       // failed initialization
       return -1;
     }
   }
-  if (_isacCodingMode == CHANNEL_INDEPENDENT) {
-
+  if (isac_coding_mode_ == CHANNEL_INDEPENDENT) {
     status = ACM_ISAC_CONTROL(
-        _codecInstPtr->inst, _isacCurrentBN,
-        (encoderSampFreq == 32000 || encoderSampFreq == 48000) ? 30 :
-            (_frameLenSmpl / 16));
+        codec_inst_ptr_->inst, isac_current_bn_,
+        (encoder_samp_freq == 32000 || encoder_samp_freq == 48000) ? 30 :
+            (frame_len_smpl_ / 16));
     if (status < 0) {
       status = -1;
     }
   }
 
   // Update encoder parameters
-  _encoderParams.codecInstant.rate = bitRate;
+  encoder_params_.codec_inst.rate = bit_rate;
 
   UpdateFrameLen();
   return status;
 }
 
 WebRtc_Word32 ACMISAC::GetEstimatedBandwidthSafe() {
-  WebRtc_Word16 bandwidthIndex = 0;
-  WebRtc_Word16 delayIndex = 0;
-  int sampRate;
+  WebRtc_Word16 bandwidth_index = 0;
+  WebRtc_Word16 delay_index = 0;
+  int samp_rate;
 
   // Get bandwidth information
-  ACM_ISAC_GETSENDBWE(_codecInstPtr->inst, &bandwidthIndex, &delayIndex);
+  ACM_ISAC_GETSENDBWE(codec_inst_ptr_->inst, &bandwidth_index, &delay_index);
 
   // Validy check of index
-  if ((bandwidthIndex < 0) || (bandwidthIndex >= NR_ISAC_BANDWIDTHS)) {
+  if ((bandwidth_index < 0) || (bandwidth_index >= NR_ISAC_BANDWIDTHS)) {
     return -1;
   }
 
   // Check sample frequency
-  sampRate = ACM_ISAC_GETDECSAMPRATE(_codecInstPtr->inst);
-  if (sampRate == 16000) {
-    return isacRatesWB[bandwidthIndex];
+  samp_rate = ACM_ISAC_GETDECSAMPRATE(codec_inst_ptr_->inst);
+  if (samp_rate == 16000) {
+    return kIsacRatesWb[bandwidth_index];
   } else {
-    return isacRatesSWB[bandwidthIndex];
+    return kIsacRatesSwb[bandwidth_index];
   }
 }
 
 WebRtc_Word32 ACMISAC::SetEstimatedBandwidthSafe(
-    WebRtc_Word32 estimatedBandwidth) {
-  int sampRate;
-  WebRtc_Word16 bandwidthIndex;
+    WebRtc_Word32 estimated_bandwidth) {
+  int samp_rate;
+  WebRtc_Word16 bandwidth_index;
 
   // Check sample frequency and choose appropriate table
-  sampRate = ACM_ISAC_GETENCSAMPRATE(_codecInstPtr->inst);
+  samp_rate = ACM_ISAC_GETENCSAMPRATE(codec_inst_ptr_->inst);
 
-  if (sampRate == 16000) {
+  if (samp_rate == 16000) {
     // Search through the WB rate table to find the index
-    bandwidthIndex = NR_ISAC_BANDWIDTHS / 2 - 1;
+    bandwidth_index = NR_ISAC_BANDWIDTHS / 2 - 1;
     for (int i = 0; i < (NR_ISAC_BANDWIDTHS / 2); i++) {
-      if (estimatedBandwidth == isacRatesWB[i]) {
-        bandwidthIndex = i;
+      if (estimated_bandwidth == kIsacRatesWb[i]) {
+        bandwidth_index = i;
         break;
-      } else if (estimatedBandwidth
-          == isacRatesWB[i + NR_ISAC_BANDWIDTHS / 2]) {
-        bandwidthIndex = i + NR_ISAC_BANDWIDTHS / 2;
+      } else if (estimated_bandwidth
+          == kIsacRatesWb[i + NR_ISAC_BANDWIDTHS / 2]) {
+        bandwidth_index = i + NR_ISAC_BANDWIDTHS / 2;
         break;
-      } else if (estimatedBandwidth < isacRatesWB[i]) {
-        bandwidthIndex = i;
+      } else if (estimated_bandwidth < kIsacRatesWb[i]) {
+        bandwidth_index = i;
         break;
       }
     }
   } else {
     // Search through the SWB rate table to find the index
-    bandwidthIndex = NR_ISAC_BANDWIDTHS - 1;
+    bandwidth_index = NR_ISAC_BANDWIDTHS - 1;
     for (int i = 0; i < NR_ISAC_BANDWIDTHS; i++) {
-      if (estimatedBandwidth <= isacRatesSWB[i]) {
-        bandwidthIndex = i;
+      if (estimated_bandwidth <= kIsacRatesSwb[i]) {
+        bandwidth_index = i;
         break;
       }
     }
   }
 
   // Set iSAC Bandwidth Estimate
-  ACM_ISAC_SETBWE(_codecInstPtr->inst, bandwidthIndex);
+  ACM_ISAC_SETBWE(codec_inst_ptr_->inst, bandwidth_index);
 
   return 0;
 }
 
 WebRtc_Word32 ACMISAC::GetRedPayloadSafe(
 #if (!defined(WEBRTC_CODEC_ISAC))
-    WebRtc_UWord8* /* redPayload */, WebRtc_Word16* /* payloadBytes */) {
+    WebRtc_UWord8* /* red_payload */, WebRtc_Word16* /* payload_bytes */) {
   return -1;
 #else
-    WebRtc_UWord8* redPayload, WebRtc_Word16* payloadBytes) {
-  WebRtc_Word16 bytes = WebRtcIsac_GetRedPayload(_codecInstPtr->inst,
-                                                 (WebRtc_Word16*)redPayload);
+    WebRtc_UWord8* red_payload, WebRtc_Word16* payload_bytes) {
+  WebRtc_Word16 bytes = WebRtcIsac_GetRedPayload(codec_inst_ptr_->inst,
+                                                 (WebRtc_Word16*)red_payload);
   if (bytes < 0) {
     return -1;
   }
-  *payloadBytes = bytes;
+  *payload_bytes = bytes;
   return 0;
 #endif
 }
 
 WebRtc_Word16 ACMISAC::UpdateDecoderSampFreq(
 #ifdef WEBRTC_CODEC_ISAC
-    WebRtc_Word16 codecId) {
-  // The decoder supports only wideband and super-wideband.
-  if (ACMCodecDB::kISAC == codecId) {
-    return WebRtcIsac_SetDecSampRate(_codecInstPtr->inst, 16000);
-  } else if (ACMCodecDB::kISACSWB == codecId ||
-      ACMCodecDB::kISACFB == codecId) {
-    return WebRtcIsac_SetDecSampRate(_codecInstPtr->inst, 32000);
+    WebRtc_Word16 codec_id) {
+    // The decoder supports only wideband and super-wideband.
+  if (ACMCodecDB::kISAC == codec_id) {
+    return WebRtcIsac_SetDecSampRate(codec_inst_ptr_->inst, 16000);
+  } else if (ACMCodecDB::kISACSWB == codec_id ||
+      ACMCodecDB::kISACFB == codec_id) {
+    return WebRtcIsac_SetDecSampRate(codec_inst_ptr_->inst, 32000);
   } else {
     return -1;
   }
 #else
-    WebRtc_Word16 /* codecId */) {
+    WebRtc_Word16 /* codec_id */) {
   return 0;
 #endif
 }
 
 WebRtc_Word16 ACMISAC::UpdateEncoderSampFreq(
 #ifdef WEBRTC_CODEC_ISAC
-    WebRtc_UWord16 encoderSampFreqHz) {
-  WebRtc_UWord16 currentSampRateHz;
-  EncoderSampFreq(currentSampRateHz);
+    WebRtc_UWord16 encoder_samp_freq_hz) {
+  WebRtc_UWord16 current_samp_rate_hz;
+  EncoderSampFreq(current_samp_rate_hz);
 
-  if (currentSampRateHz != encoderSampFreqHz) {
-    if ((encoderSampFreqHz != 16000) && (encoderSampFreqHz != 32000) &&
-        (encoderSampFreqHz != 48000)) {
+  if (current_samp_rate_hz != encoder_samp_freq_hz) {
+    if ((encoder_samp_freq_hz != 16000) &&
+        (encoder_samp_freq_hz != 32000) &&
+        (encoder_samp_freq_hz != 48000)) {
       return -1;
     } else {
-      _inAudioIxRead = 0;
-      _inAudioIxWrite = 0;
-      _inTimestampIxWrite = 0;
-      if (WebRtcIsac_SetEncSampRate(_codecInstPtr->inst,
-                                    encoderSampFreqHz) < 0) {
+      in_audio_ix_read_ = 0;
+      in_audio_ix_write_ = 0;
+      in_timestamp_ix_write_ = 0;
+      if (WebRtcIsac_SetEncSampRate(codec_inst_ptr_->inst,
+                                    encoder_samp_freq_hz) < 0) {
         return -1;
       }
-      _samplesIn10MsAudio = encoderSampFreqHz / 100;
-      _frameLenSmpl = ACM_ISAC_GETNEWFRAMELEN(_codecInstPtr->inst);
-      _encoderParams.codecInstant.pacsize = _frameLenSmpl;
-      _encoderParams.codecInstant.plfreq = encoderSampFreqHz;
+      samples_in_10ms_audio_ = encoder_samp_freq_hz / 100;
+      frame_len_smpl_ = ACM_ISAC_GETNEWFRAMELEN(codec_inst_ptr_->inst);
+      encoder_params_.codec_inst.pacsize = frame_len_smpl_;
+      encoder_params_.codec_inst.plfreq = encoder_samp_freq_hz;
       return 0;
     }
   }
 #else
-    WebRtc_UWord16 /* codecId */) {
+    WebRtc_UWord16 /* codec_id */) {
 #endif
   return 0;
 }
 
-WebRtc_Word16 ACMISAC::EncoderSampFreq(WebRtc_UWord16& sampFreqHz) {
-  sampFreqHz = ACM_ISAC_GETENCSAMPRATE(_codecInstPtr->inst);
+WebRtc_Word16 ACMISAC::EncoderSampFreq(WebRtc_UWord16& samp_freq_hz) {
+  samp_freq_hz = ACM_ISAC_GETENCSAMPRATE(codec_inst_ptr_->inst);
   return 0;
 }
 
 WebRtc_Word32 ACMISAC::ConfigISACBandwidthEstimator(
-    const WebRtc_UWord8 initFrameSizeMsec,
-    const WebRtc_UWord16 initRateBitPerSec, const bool enforceFrameSize) {
+    const WebRtc_UWord8 init_frame_size_msec,
+    const WebRtc_UWord16 init_rate_bit_per_sec,
+    const bool enforce_frame_size) {
   WebRtc_Word16 status;
   {
-    WebRtc_UWord16 sampFreqHz;
-    EncoderSampFreq(sampFreqHz);
+    WebRtc_UWord16 samp_freq_hz;
+    EncoderSampFreq(samp_freq_hz);
     // TODO(turajs): at 32kHz we hardcode calling with 30ms and enforce
     // the frame-size otherwise we might get error. Revise if
     // control-bwe is changed.
-    if (sampFreqHz == 32000 || sampFreqHz == 48000) {
-      status = ACM_ISAC_CONTROL_BWE(_codecInstPtr->inst, initRateBitPerSec, 30,
-                                    1);
+    if (samp_freq_hz == 32000 || samp_freq_hz == 48000) {
+      status = ACM_ISAC_CONTROL_BWE(codec_inst_ptr_->inst,
+                                    init_rate_bit_per_sec, 30, 1);
     } else {
-      status = ACM_ISAC_CONTROL_BWE(_codecInstPtr->inst, initRateBitPerSec,
-                                    initFrameSizeMsec,
-                                    enforceFrameSize ? 1 : 0);
+      status = ACM_ISAC_CONTROL_BWE(codec_inst_ptr_->inst,
+                                    init_rate_bit_per_sec,
+                                    init_frame_size_msec,
+                                    enforce_frame_size ? 1 : 0);
     }
   }
   if (status < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Couldn't config iSAC BWE.");
     return -1;
   }
   UpdateFrameLen();
-  ACM_ISAC_GETSENDBITRATE(_codecInstPtr->inst, &_isacCurrentBN);
+  ACM_ISAC_GETSENDBITRATE(codec_inst_ptr_->inst, &isac_current_bn_);
   return 0;
 }
 
 WebRtc_Word32 ACMISAC::SetISACMaxPayloadSize(
-    const WebRtc_UWord16 maxPayloadLenBytes) {
-  return ACM_ISAC_SETMAXPAYLOADSIZE(_codecInstPtr->inst, maxPayloadLenBytes);
+    const WebRtc_UWord16 max_payload_len_bytes) {
+  return ACM_ISAC_SETMAXPAYLOADSIZE(codec_inst_ptr_->inst,
+                                    max_payload_len_bytes);
 }
 
-WebRtc_Word32 ACMISAC::SetISACMaxRate(const WebRtc_UWord32 maxRateBitPerSec) {
-  return ACM_ISAC_SETMAXRATE(_codecInstPtr->inst, maxRateBitPerSec);
+WebRtc_Word32 ACMISAC::SetISACMaxRate(
+    const WebRtc_UWord32 max_rate_bit_per_sec) {
+  return ACM_ISAC_SETMAXRATE(codec_inst_ptr_->inst, max_rate_bit_per_sec);
 }
 
 void ACMISAC::UpdateFrameLen() {
-  _frameLenSmpl = ACM_ISAC_GETNEWFRAMELEN(_codecInstPtr->inst);
-  _encoderParams.codecInstant.pacsize = _frameLenSmpl;
+  frame_len_smpl_ = ACM_ISAC_GETNEWFRAMELEN(codec_inst_ptr_->inst);
+  encoder_params_.codec_inst.pacsize = frame_len_smpl_;
 }
 
-void ACMISAC::CurrentRate(WebRtc_Word32& rateBitPerSec) {
-  if (_isacCodingMode == ADAPTIVE) {
-    ACM_ISAC_GETSENDBITRATE(_codecInstPtr->inst, &rateBitPerSec);
+void ACMISAC::CurrentRate(WebRtc_Word32& rate_bit_per_sec) {
+  if (isac_coding_mode_ == ADAPTIVE) {
+    ACM_ISAC_GETSENDBITRATE(codec_inst_ptr_->inst, &rate_bit_per_sec);
   }
 }
 
-bool ACMISAC::DecoderParamsSafe(WebRtcACMCodecParams* decParams,
-                                const WebRtc_UWord8 payloadType) {
-  if (_decoderInitialized) {
-    if (payloadType == _decoderParams.codecInstant.pltype) {
-      memcpy(decParams, &_decoderParams, sizeof(WebRtcACMCodecParams));
+bool ACMISAC::DecoderParamsSafe(WebRtcACMCodecParams* dec_params,
+                                const WebRtc_UWord8 payload_type) {
+  if (decoder_initialized_) {
+    if (payload_type == decoder_params_.codec_inst.pltype) {
+      memcpy(dec_params, &decoder_params_, sizeof(WebRtcACMCodecParams));
       return true;
     }
-    if (payloadType == _decoderParams32kHz.codecInstant.pltype) {
-      memcpy(decParams, &_decoderParams32kHz, sizeof(WebRtcACMCodecParams));
+    if (payload_type == decoder_params_32khz_.codec_inst.pltype) {
+      memcpy(dec_params, &decoder_params_32khz_, sizeof(WebRtcACMCodecParams));
       return true;
     }
   }
   return false;
 }
 
-void ACMISAC::SaveDecoderParamSafe(const WebRtcACMCodecParams* codecParams) {
+void ACMISAC::SaveDecoderParamSafe(const WebRtcACMCodecParams* codec_params) {
   // set decoder sampling frequency.
-  if (codecParams->codecInstant.plfreq == 32000 ||
-      codecParams->codecInstant.plfreq == 48000) {
-    memcpy(&_decoderParams32kHz, codecParams, sizeof(WebRtcACMCodecParams));
+  if (codec_params->codec_inst.plfreq == 32000 ||
+      codec_params->codec_inst.plfreq == 48000) {
+    memcpy(&decoder_params_32khz_, codec_params, sizeof(WebRtcACMCodecParams));
   } else {
-    memcpy(&_decoderParams, codecParams, sizeof(WebRtcACMCodecParams));
+    memcpy(&decoder_params_, codec_params, sizeof(WebRtcACMCodecParams));
   }
 }
 
-WebRtc_Word16 ACMISAC::REDPayloadISAC(const WebRtc_Word32 isacRate,
-                                      const WebRtc_Word16 isacBwEstimate,
+WebRtc_Word16 ACMISAC::REDPayloadISAC(const WebRtc_Word32 isac_rate,
+                                      const WebRtc_Word16 isac_bw_estimate,
                                       WebRtc_UWord8* payload,
-                                      WebRtc_Word16* payloadLenBytes) {
+                                      WebRtc_Word16* payload_len_bytes) {
   WebRtc_Word16 status;
-  ReadLockScoped rl(_codecWrapperLock);
-  status = Transcode(payload, payloadLenBytes, isacBwEstimate, isacRate, true);
+  ReadLockScoped rl(codec_wrapper_lock_);
+  status = Transcode(payload, payload_len_bytes, isac_bw_estimate, isac_rate,
+                     true);
   return status;
 }
 
diff --git a/webrtc/modules/audio_coding/main/source/acm_isac.h b/webrtc/modules/audio_coding/main/source/acm_isac.h
index ee22637..1724cf8 100644
--- a/webrtc/modules/audio_coding/main/source/acm_isac.h
+++ b/webrtc/modules/audio_coding/main/source/acm_isac.h
@@ -11,112 +11,118 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_ISAC_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_ISAC_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 namespace webrtc {
 
 struct ACMISACInst;
 
-enum iSACCodingMode {
+enum IsacCodingMode {
   ADAPTIVE,
   CHANNEL_INDEPENDENT
 };
 
 class ACMISAC : public ACMGenericCodec {
  public:
-  ACMISAC(WebRtc_Word16 codecID);
+  explicit ACMISAC(WebRtc_Word16 codec_id);
   ~ACMISAC();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 DeliverCachedIsacData(WebRtc_UWord8* bitStream,
-                                      WebRtc_Word16* bitStreamLenByte,
+  WebRtc_Word16 DeliverCachedIsacData(WebRtc_UWord8* bitstream,
+                                      WebRtc_Word16* bitstream_len_byte,
                                       WebRtc_UWord32* timestamp,
-                                      WebRtcACMEncodingType* encodingType,
-                                      const WebRtc_UWord16 isacRate,
-                                      const WebRtc_UWord8 isacBWestimate);
+                                      WebRtcACMEncodingType* encoding_type,
+                                      const WebRtc_UWord16 isac_rate,
+                                      const WebRtc_UWord8 isac_bwestimate);
 
-  WebRtc_Word16 DeliverCachedData(WebRtc_UWord8* /* bitStream */,
-                                  WebRtc_Word16* /* bitStreamLenByte */,
+  WebRtc_Word16 DeliverCachedData(WebRtc_UWord8* /* bitstream */,
+                                  WebRtc_Word16* /* bitstream_len_byte */,
                                   WebRtc_UWord32* /* timestamp */,
-                                  WebRtcACMEncodingType* /* encodingType */) {
+                                  WebRtcACMEncodingType* /* encoding_type */) {
     return -1;
   }
 
-  WebRtc_Word16 UpdateDecoderSampFreq(WebRtc_Word16 codecId);
+  WebRtc_Word16 UpdateDecoderSampFreq(WebRtc_Word16 codec_id);
 
-  WebRtc_Word16 UpdateEncoderSampFreq(WebRtc_UWord16 sampFreqHz);
+  WebRtc_Word16 UpdateEncoderSampFreq(WebRtc_UWord16 samp_freq_hz);
 
-  WebRtc_Word16 EncoderSampFreq(WebRtc_UWord16& sampFreqHz);
+  WebRtc_Word16 EncoderSampFreq(WebRtc_UWord16& samp_freq_hz);
 
   WebRtc_Word32 ConfigISACBandwidthEstimator(
-      const WebRtc_UWord8 initFrameSizeMsec,
-      const WebRtc_UWord16 initRateBitPerSec, const bool enforceFrameSize);
+      const WebRtc_UWord8 init_frame_size_msec,
+      const WebRtc_UWord16 init_rate_bit_per_sec,
+      const bool enforce_frame_size);
 
-  WebRtc_Word32 SetISACMaxPayloadSize(const WebRtc_UWord16 maxPayloadLenBytes);
+  WebRtc_Word32 SetISACMaxPayloadSize(
+      const WebRtc_UWord16 max_payload_len_bytes);
 
-  WebRtc_Word32 SetISACMaxRate(const WebRtc_UWord32 maxRateBitPerSec);
+  WebRtc_Word32 SetISACMaxRate(const WebRtc_UWord32 max_rate_bit_per_sec);
 
-  WebRtc_Word16 REDPayloadISAC(const WebRtc_Word32 isacRate,
-                               const WebRtc_Word16 isacBwEstimate,
+  WebRtc_Word16 REDPayloadISAC(const WebRtc_Word32 isac_rate,
+                               const WebRtc_Word16 isac_bw_estimate,
                                WebRtc_UWord8* payload,
-                               WebRtc_Word16* payloadLenBytes);
+                               WebRtc_Word16* payload_len_bytes);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte, WebRtc_Word16* audio,
-                           WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
+                           WebRtc_Word16* audio,
+                           WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
   void DestructDecoderSafe();
 
-  WebRtc_Word16 SetBitRateSafe(const WebRtc_Word32 bitRate);
+  WebRtc_Word16 SetBitRateSafe(const WebRtc_Word32 bit_rate);
 
   WebRtc_Word32 GetEstimatedBandwidthSafe();
 
-  WebRtc_Word32 SetEstimatedBandwidthSafe(WebRtc_Word32 estimatedBandwidth);
+  WebRtc_Word32 SetEstimatedBandwidthSafe(WebRtc_Word32 estimated_bandwidth);
 
-  WebRtc_Word32 GetRedPayloadSafe(WebRtc_UWord8* redPayload,
-                                  WebRtc_Word16* payloadBytes);
+  WebRtc_Word32 GetRedPayloadSafe(WebRtc_UWord8* red_payload,
+                                  WebRtc_Word16* payload_bytes);
 
   WebRtc_Word16 InternalCreateEncoder();
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
-  WebRtc_Word16 Transcode(WebRtc_UWord8* bitStream,
-                          WebRtc_Word16* bitStreamLenByte, WebRtc_Word16 qBWE,
-                          WebRtc_Word32 rate, bool isRED);
+  WebRtc_Word16 Transcode(WebRtc_UWord8* bitstream,
+                          WebRtc_Word16* bitstream_len_byte,
+                          WebRtc_Word16 q_bwe,
+                          WebRtc_Word32 rate,
+                          bool is_red);
 
-  void CurrentRate(WebRtc_Word32& rateBitPerSec);
+  void CurrentRate(WebRtc_Word32& rate_bit_per_sec);
 
   void UpdateFrameLen();
 
-  bool DecoderParamsSafe(WebRtcACMCodecParams *decParams,
-                         const WebRtc_UWord8 payloadType);
+  bool DecoderParamsSafe(WebRtcACMCodecParams *dec_params,
+                         const WebRtc_UWord8 payload_type);
 
-  void SaveDecoderParamSafe(const WebRtcACMCodecParams* codecParams);
+  void SaveDecoderParamSafe(const WebRtcACMCodecParams* codec_params);
 
-  ACMISACInst* _codecInstPtr;
-  bool _isEncInitialized;
-  iSACCodingMode _isacCodingMode;
-  bool _enforceFrameSize;
-  WebRtc_Word32 _isacCurrentBN;
-  WebRtc_UWord16 _samplesIn10MsAudio;
-  WebRtcACMCodecParams _decoderParams32kHz;
+  ACMISACInst* codec_inst_ptr_;
+  bool is_enc_initialized_;
+  IsacCodingMode isac_coding_mode_;
+  bool enforce_frame_size_;
+  WebRtc_Word32 isac_current_bn_;
+  WebRtc_UWord16 samples_in_10ms_audio_;
+  WebRtcACMCodecParams decoder_params_32khz_;
 };
 
 }  // namespace
diff --git a/webrtc/modules/audio_coding/main/source/acm_isac_macros.h b/webrtc/modules/audio_coding/main/source/acm_isac_macros.h
index 07031d6..99d7084 100644
--- a/webrtc/modules/audio_coding/main/source/acm_isac_macros.h
+++ b/webrtc/modules/audio_coding/main/source/acm_isac_macros.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_ISAC_MACROS_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_ISAC_MACROS_H_
 
-#include "engine_configurations.h"
+#include "webrtc/engine_configurations.h"
 
 namespace webrtc {
 
diff --git a/webrtc/modules/audio_coding/main/source/acm_neteq.cc b/webrtc/modules/audio_coding/main/source/acm_neteq.cc
index 671a5e3..497be79 100644
--- a/webrtc/modules/audio_coding/main/source/acm_neteq.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_neteq.cc
@@ -8,19 +8,21 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include <algorithm>  // sort
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+
 #include <stdlib.h>  // malloc
+
+#include <algorithm>  // sort
 #include <vector>
 
-#include "acm_neteq.h"
-#include "common_types.h"
-#include "critical_section_wrapper.h"
-#include "rw_lock_wrapper.h"
-#include "signal_processing_library.h"
-#include "tick_util.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_internal.h"
+#include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
+#include "webrtc/common_types.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_internal.h"
+#include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
+#include "webrtc/system_wrappers/interface/rw_lock_wrapper.h"
+#include "webrtc/system_wrappers/interface/tick_util.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 namespace webrtc {
 
@@ -30,81 +32,81 @@
 #define NETEQ_ERR_MSG_LEN_BYTE (WEBRTC_NETEQ_MAX_ERROR_NAME + 1)
 
 ACMNetEQ::ACMNetEQ()
-    : _id(0),
-      _currentSampFreqKHz(NETEQ_INIT_FREQ_KHZ),
-      _avtPlayout(false),
-      _playoutMode(voice),
-      _netEqCritSect(CriticalSectionWrapper::CreateCriticalSection()),
-      _vadStatus(false),
-      _vadMode(VADNormal),
-      _decodeLock(RWLockWrapper::CreateRWLock()),
-      _numSlaves(0),
-      _receivedStereo(false),
-      _masterSlaveInfo(NULL),
-      _previousAudioActivity(AudioFrame::kVadUnknown),
-      _extraDelay(0),
-      _callbackCritSect(CriticalSectionWrapper::CreateCriticalSection()) {
+    : id_(0),
+      current_samp_freq_khz_(NETEQ_INIT_FREQ_KHZ),
+      avt_playout_(false),
+      playout_mode_(voice),
+      neteq_crit_sect_(CriticalSectionWrapper::CreateCriticalSection()),
+      vad_status_(false),
+      vad_mode_(VADNormal),
+      decode_lock_(RWLockWrapper::CreateRWLock()),
+      num_slaves_(0),
+      received_stereo_(false),
+      master_slave_info_(NULL),
+      previous_audio_activity_(AudioFrame::kVadUnknown),
+      extra_delay_(0),
+      callback_crit_sect_(CriticalSectionWrapper::CreateCriticalSection()) {
   for (int n = 0; n < MAX_NUM_SLAVE_NETEQ + 1; n++) {
-    _isInitialized[n] = false;
-    _ptrVADInst[n] = NULL;
-    _inst[n] = NULL;
-    _instMem[n] = NULL;
-    _netEqPacketBuffer[n] = NULL;
+    is_initialized_[n] = false;
+    ptr_vadinst_[n] = NULL;
+    inst_[n] = NULL;
+    inst_mem_[n] = NULL;
+    neteq_packet_buffer_[n] = NULL;
   }
 }
 
 ACMNetEQ::~ACMNetEQ() {
   {
-    CriticalSectionScoped lock(_netEqCritSect);
+    CriticalSectionScoped lock(neteq_crit_sect_);
     RemoveNetEQSafe(0);  // Master.
     RemoveSlavesSafe();
   }
-  if (_netEqCritSect != NULL) {
-    delete _netEqCritSect;
+  if (neteq_crit_sect_ != NULL) {
+    delete neteq_crit_sect_;
   }
 
-  if (_decodeLock != NULL) {
-    delete _decodeLock;
+  if (decode_lock_ != NULL) {
+    delete decode_lock_;
   }
 
-  if (_callbackCritSect != NULL) {
-    delete _callbackCritSect;
+  if (callback_crit_sect_ != NULL) {
+    delete callback_crit_sect_;
   }
 }
 
 WebRtc_Word32 ACMNetEQ::Init() {
-  CriticalSectionScoped lock(_netEqCritSect);
+  CriticalSectionScoped lock(neteq_crit_sect_);
 
-  for (WebRtc_Word16 idx = 0; idx < _numSlaves + 1; idx++) {
+  for (WebRtc_Word16 idx = 0; idx < num_slaves_ + 1; idx++) {
     if (InitByIdxSafe(idx) < 0) {
       return -1;
     }
     // delete VAD instance and start fresh if required.
-    if (_ptrVADInst[idx] != NULL) {
-      WebRtcVad_Free(_ptrVADInst[idx]);
-      _ptrVADInst[idx] = NULL;
+    if (ptr_vadinst_[idx] != NULL) {
+      WebRtcVad_Free(ptr_vadinst_[idx]);
+      ptr_vadinst_[idx] = NULL;
     }
-    if (_vadStatus) {
+    if (vad_status_) {
       // Has to enable VAD
       if (EnableVADByIdxSafe(idx) < 0) {
         // Failed to enable VAD.
         // Delete VAD instance, if it is created
-        if (_ptrVADInst[idx] != NULL) {
-          WebRtcVad_Free(_ptrVADInst[idx]);
-          _ptrVADInst[idx] = NULL;
+        if (ptr_vadinst_[idx] != NULL) {
+          WebRtcVad_Free(ptr_vadinst_[idx]);
+          ptr_vadinst_[idx] = NULL;
         }
         // We are at initialization of NetEq, if failed to
         // enable VAD, we delete the NetEq instance.
-        if (_instMem[idx] != NULL) {
-          free(_instMem[idx]);
-          _instMem[idx] = NULL;
-          _inst[idx] = NULL;
+        if (inst_mem_[idx] != NULL) {
+          free(inst_mem_[idx]);
+          inst_mem_[idx] = NULL;
+          inst_[idx] = NULL;
         }
-        _isInitialized[idx] = false;
+        is_initialized_[idx] = false;
         return -1;
       }
     }
-    _isInitialized[idx] = true;
+    is_initialized_[idx] = true;
   }
   if (EnableVAD() == -1) {
     return -1;
@@ -113,56 +115,56 @@
 }
 
 WebRtc_Word16 ACMNetEQ::InitByIdxSafe(const WebRtc_Word16 idx) {
-  int memorySizeBytes;
-  if (WebRtcNetEQ_AssignSize(&memorySizeBytes) != 0) {
+  int memory_size_bytes;
+  if (WebRtcNetEQ_AssignSize(&memory_size_bytes) != 0) {
     LogError("AssignSize", idx);
     return -1;
   }
 
-  if (_instMem[idx] != NULL) {
-    free(_instMem[idx]);
-    _instMem[idx] = NULL;
+  if (inst_mem_[idx] != NULL) {
+    free(inst_mem_[idx]);
+    inst_mem_[idx] = NULL;
   }
-  _instMem[idx] = malloc(memorySizeBytes);
-  if (_instMem[idx] == NULL) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-        "InitByIdxSafe: NetEq Initialization error: could not allocate memory "
-        "for NetEq");
-    _isInitialized[idx] = false;
+  inst_mem_[idx] = malloc(memory_size_bytes);
+  if (inst_mem_[idx] == NULL) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                 "InitByIdxSafe: NetEq Initialization error: could not "
+                 "allocate memory for NetEq");
+    is_initialized_[idx] = false;
     return -1;
   }
-  if (WebRtcNetEQ_Assign(&_inst[idx], _instMem[idx]) != 0) {
-    if (_instMem[idx] != NULL) {
-      free(_instMem[idx]);
-      _instMem[idx] = NULL;
+  if (WebRtcNetEQ_Assign(&inst_[idx], inst_mem_[idx]) != 0) {
+    if (inst_mem_[idx] != NULL) {
+      free(inst_mem_[idx]);
+      inst_mem_[idx] = NULL;
     }
     LogError("Assign", idx);
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "InitByIdxSafe: NetEq Initialization error: could not Assign");
-    _isInitialized[idx] = false;
+    is_initialized_[idx] = false;
     return -1;
   }
-  if (WebRtcNetEQ_Init(_inst[idx], NETEQ_INIT_FREQ) != 0) {
-    if (_instMem[idx] != NULL) {
-      free(_instMem[idx]);
-      _instMem[idx] = NULL;
+  if (WebRtcNetEQ_Init(inst_[idx], NETEQ_INIT_FREQ) != 0) {
+    if (inst_mem_[idx] != NULL) {
+      free(inst_mem_[idx]);
+      inst_mem_[idx] = NULL;
     }
     LogError("Init", idx);
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-        "InitByIdxSafe: NetEq Initialization error: could not initialize "
-        "NetEq");
-    _isInitialized[idx] = false;
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                 "InitByIdxSafe: NetEq Initialization error: could not "
+                 "initialize NetEq");
+    is_initialized_[idx] = false;
     return -1;
   }
-  _isInitialized[idx] = true;
+  is_initialized_[idx] = true;
   return 0;
 }
 
 WebRtc_Word16 ACMNetEQ::EnableVADByIdxSafe(const WebRtc_Word16 idx) {
-  if (_ptrVADInst[idx] == NULL) {
-    if (WebRtcVad_Create(&_ptrVADInst[idx]) < 0) {
-      _ptrVADInst[idx] = NULL;
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if (ptr_vadinst_[idx] == NULL) {
+    if (WebRtcVad_Create(&ptr_vadinst_[idx]) < 0) {
+      ptr_vadinst_[idx] = NULL;
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "EnableVADByIdxSafe: NetEq Initialization error: could not "
                    "create VAD");
       return -1;
@@ -170,37 +172,37 @@
   }
 
   if (WebRtcNetEQ_SetVADInstance(
-      _inst[idx], _ptrVADInst[idx],
+      inst_[idx], ptr_vadinst_[idx],
       (WebRtcNetEQ_VADInitFunction) WebRtcVad_Init,
       (WebRtcNetEQ_VADSetmodeFunction) WebRtcVad_set_mode,
       (WebRtcNetEQ_VADFunction) WebRtcVad_Process) < 0) {
     LogError("setVADinstance", idx);
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-        "EnableVADByIdxSafe: NetEq Initialization error: could not set "
-        "VAD instance");
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                 "EnableVADByIdxSafe: NetEq Initialization error: could not "
+                 "set VAD instance");
     return -1;
   }
 
-  if (WebRtcNetEQ_SetVADMode(_inst[idx], _vadMode) < 0) {
+  if (WebRtcNetEQ_SetVADMode(inst_[idx], vad_mode_) < 0) {
     LogError("setVADmode", idx);
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-        "EnableVADByIdxSafe: NetEq Initialization error: could not set "
-        "VAD mode");
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                 "EnableVADByIdxSafe: NetEq Initialization error: could not "
+                 "set VAD mode");
     return -1;
   }
   return 0;
 }
 
 WebRtc_Word32 ACMNetEQ::AllocatePacketBuffer(
-    const WebRtcNetEQDecoder* usedCodecs,
-    WebRtc_Word16 noOfCodecs) {
+    const WebRtcNetEQDecoder* used_codecs,
+    WebRtc_Word16 num_codecs) {
   // Due to WebRtcNetEQ_GetRecommendedBufferSize
   // the following has to be int otherwise we will have compiler error
   // if not casted
 
-  CriticalSectionScoped lock(_netEqCritSect);
-  for (WebRtc_Word16 idx = 0; idx < _numSlaves + 1; idx++) {
-    if (AllocatePacketBufferByIdxSafe(usedCodecs, noOfCodecs, idx) < 0) {
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  for (WebRtc_Word16 idx = 0; idx < num_slaves_ + 1; idx++) {
+    if (AllocatePacketBufferByIdxSafe(used_codecs, num_codecs, idx) < 0) {
       return -1;
     }
   }
@@ -208,42 +210,43 @@
 }
 
 WebRtc_Word16 ACMNetEQ::AllocatePacketBufferByIdxSafe(
-    const WebRtcNetEQDecoder* usedCodecs,
-    WebRtc_Word16 noOfCodecs,
+    const WebRtcNetEQDecoder* used_codecs,
+    WebRtc_Word16 num_codecs,
     const WebRtc_Word16 idx) {
-  int maxNoPackets;
-  int bufferSizeInBytes;
+  int max_num_packets;
+  int buffer_size_in_bytes;
 
-  if (!_isInitialized[idx]) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if (!is_initialized_[idx]) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "AllocatePacketBufferByIdxSafe: NetEq is not initialized.");
     return -1;
   }
-  if (WebRtcNetEQ_GetRecommendedBufferSize(_inst[idx], usedCodecs, noOfCodecs,
-                                           kTCPLargeJitter, &maxNoPackets,
-                                           &bufferSizeInBytes) != 0) {
+  if (WebRtcNetEQ_GetRecommendedBufferSize(inst_[idx], used_codecs,
+                                           num_codecs,
+                                           kTCPLargeJitter,
+                                           &max_num_packets,
+                                           &buffer_size_in_bytes) != 0) {
     LogError("GetRecommendedBufferSize", idx);
     return -1;
   }
-  if (_netEqPacketBuffer[idx] != NULL) {
-    free(_netEqPacketBuffer[idx]);
-    _netEqPacketBuffer[idx] = NULL;
+  if (neteq_packet_buffer_[idx] != NULL) {
+    free(neteq_packet_buffer_[idx]);
+    neteq_packet_buffer_[idx] = NULL;
   }
 
-  _netEqPacketBuffer[idx] = (WebRtc_Word16 *) malloc(bufferSizeInBytes);
-  if (_netEqPacketBuffer[idx] == NULL) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-        "AllocatePacketBufferByIdxSafe: NetEq Initialization error: could not "
-        "allocate memory for NetEq Packet Buffer");
+  neteq_packet_buffer_[idx] = (WebRtc_Word16 *) malloc(buffer_size_in_bytes);
+  if (neteq_packet_buffer_[idx] == NULL) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                 "AllocatePacketBufferByIdxSafe: NetEq Initialization error: "
+                 "could not allocate memory for NetEq Packet Buffer");
     return -1;
-
   }
-  if (WebRtcNetEQ_AssignBuffer(_inst[idx], maxNoPackets,
-                               _netEqPacketBuffer[idx],
-                               bufferSizeInBytes) != 0) {
-    if (_netEqPacketBuffer[idx] != NULL) {
-      free(_netEqPacketBuffer[idx]);
-      _netEqPacketBuffer[idx] = NULL;
+  if (WebRtcNetEQ_AssignBuffer(inst_[idx], max_num_packets,
+                               neteq_packet_buffer_[idx],
+                               buffer_size_in_bytes) != 0) {
+    if (neteq_packet_buffer_[idx] != NULL) {
+      free(neteq_packet_buffer_[idx]);
+      neteq_packet_buffer_[idx] = NULL;
     }
     LogError("AssignBuffer", idx);
     return -1;
@@ -251,109 +254,109 @@
   return 0;
 }
 
-WebRtc_Word32 ACMNetEQ::SetExtraDelay(const WebRtc_Word32 delayInMS) {
-  CriticalSectionScoped lock(_netEqCritSect);
+WebRtc_Word32 ACMNetEQ::SetExtraDelay(const WebRtc_Word32 delay_in_ms) {
+  CriticalSectionScoped lock(neteq_crit_sect_);
 
-  for (WebRtc_Word16 idx = 0; idx < _numSlaves + 1; idx++) {
-    if (!_isInitialized[idx]) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  for (WebRtc_Word16 idx = 0; idx < num_slaves_ + 1; idx++) {
+    if (!is_initialized_[idx]) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "SetExtraDelay: NetEq is not initialized.");
       return -1;
     }
-    if (WebRtcNetEQ_SetExtraDelay(_inst[idx], delayInMS) < 0) {
+    if (WebRtcNetEQ_SetExtraDelay(inst_[idx], delay_in_ms) < 0) {
       LogError("SetExtraDelay", idx);
       return -1;
     }
   }
-  _extraDelay = delayInMS;
+  extra_delay_ = delay_in_ms;
   return 0;
 }
 
 WebRtc_Word32 ACMNetEQ::SetAVTPlayout(const bool enable) {
-  CriticalSectionScoped lock(_netEqCritSect);
-  if (_avtPlayout != enable) {
-    for (WebRtc_Word16 idx = 0; idx < _numSlaves + 1; idx++) {
-      if (!_isInitialized[idx]) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  if (avt_playout_ != enable) {
+    for (WebRtc_Word16 idx = 0; idx < num_slaves_ + 1; idx++) {
+      if (!is_initialized_[idx]) {
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "SetAVTPlayout: NetEq is not initialized.");
         return -1;
       }
-      if (WebRtcNetEQ_SetAVTPlayout(_inst[idx], (enable) ? 1 : 0) < 0) {
+      if (WebRtcNetEQ_SetAVTPlayout(inst_[idx], (enable) ? 1 : 0) < 0) {
         LogError("SetAVTPlayout", idx);
         return -1;
       }
     }
   }
-  _avtPlayout = enable;
+  avt_playout_ = enable;
   return 0;
 }
 
-bool ACMNetEQ::AVTPlayout() const {
-  CriticalSectionScoped lock(_netEqCritSect);
-  return _avtPlayout;
+bool ACMNetEQ::avt_playout() const {
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  return avt_playout_;
 }
 
 WebRtc_Word32 ACMNetEQ::CurrentSampFreqHz() const {
-  CriticalSectionScoped lock(_netEqCritSect);
-  if (!_isInitialized[0]) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  if (!is_initialized_[0]) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "CurrentSampFreqHz: NetEq is not initialized.");
     return -1;
   }
-  return (WebRtc_Word32)(1000 * _currentSampFreqKHz);
+  return (WebRtc_Word32)(1000 * current_samp_freq_khz_);
 }
 
 WebRtc_Word32 ACMNetEQ::SetPlayoutMode(const AudioPlayoutMode mode) {
-  CriticalSectionScoped lock(_netEqCritSect);
-  if (_playoutMode != mode) {
-    for (WebRtc_Word16 idx = 0; idx < _numSlaves + 1; idx++) {
-      if (!_isInitialized[idx]) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  if (playout_mode_ != mode) {
+    for (WebRtc_Word16 idx = 0; idx < num_slaves_ + 1; idx++) {
+      if (!is_initialized_[idx]) {
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "SetPlayoutMode: NetEq is not initialized.");
         return -1;
       }
 
-      enum WebRtcNetEQPlayoutMode playoutMode = kPlayoutOff;
+      enum WebRtcNetEQPlayoutMode playout_mode = kPlayoutOff;
       switch (mode) {
         case voice:
-          playoutMode = kPlayoutOn;
+          playout_mode = kPlayoutOn;
           break;
         case fax:
-          playoutMode = kPlayoutFax;
+          playout_mode = kPlayoutFax;
           break;
         case streaming:
-          playoutMode = kPlayoutStreaming;
+          playout_mode = kPlayoutStreaming;
           break;
         case off:
-          playoutMode = kPlayoutOff;
+          playout_mode = kPlayoutOff;
           break;
       }
-      if (WebRtcNetEQ_SetPlayoutMode(_inst[idx], playoutMode) < 0) {
+      if (WebRtcNetEQ_SetPlayoutMode(inst_[idx], playout_mode) < 0) {
         LogError("SetPlayoutMode", idx);
         return -1;
       }
     }
-    _playoutMode = mode;
+    playout_mode_ = mode;
   }
 
   return 0;
 }
 
-AudioPlayoutMode ACMNetEQ::PlayoutMode() const {
-  CriticalSectionScoped lock(_netEqCritSect);
-  return _playoutMode;
+AudioPlayoutMode ACMNetEQ::playout_mode() const {
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  return playout_mode_;
 }
 
 WebRtc_Word32 ACMNetEQ::NetworkStatistics(
     ACMNetworkStatistics* statistics) const {
   WebRtcNetEQ_NetworkStatistics stats;
-  CriticalSectionScoped lock(_netEqCritSect);
-  if (!_isInitialized[0]) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  if (!is_initialized_[0]) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "NetworkStatistics: NetEq is not initialized.");
     return -1;
   }
-  if (WebRtcNetEQ_GetNetworkStatistics(_inst[0], &stats) == 0) {
+  if (WebRtcNetEQ_GetNetworkStatistics(inst_[0], &stats) == 0) {
     statistics->currentAccelerateRate = stats.currentAccelerateRate;
     statistics->currentBufferSize = stats.currentBufferSize;
     statistics->jitterPeaksFound = (stats.jitterPeaksFound > 0);
@@ -369,7 +372,7 @@
   }
   const int kArrayLen = 100;
   int waiting_times[kArrayLen];
-  int waiting_times_len = WebRtcNetEQ_GetRawFrameWaitingTimes(_inst[0],
+  int waiting_times_len = WebRtcNetEQ_GetRawFrameWaitingTimes(inst_[0],
                                                               kArrayLen,
                                                               waiting_times);
   if (waiting_times_len > 0) {
@@ -379,8 +382,8 @@
     size_t size = waiting_times_vec.size();
     assert(size == static_cast<size_t>(waiting_times_len));
     if (size % 2 == 0) {
-      statistics->medianWaitingTimeMs = (waiting_times_vec[size / 2 - 1]
-          + waiting_times_vec[size / 2]) / 2;
+      statistics->medianWaitingTimeMs = (waiting_times_vec[size / 2 - 1] +
+          waiting_times_vec[size / 2]) / 2;
     } else {
       statistics->medianWaitingTimeMs = waiting_times_vec[size / 2];
     }
@@ -403,67 +406,68 @@
   return 0;
 }
 
-WebRtc_Word32 ACMNetEQ::RecIn(const WebRtc_UWord8* incomingPayload,
-                              const WebRtc_Word32 payloadLength,
-                              const WebRtcRTPHeader& rtpInfo) {
-  WebRtc_Word16 payload_length = static_cast<WebRtc_Word16>(payloadLength);
+WebRtc_Word32 ACMNetEQ::RecIn(const WebRtc_UWord8* incoming_payload,
+                              const WebRtc_Word32 length_payload,
+                              const WebRtcRTPHeader& rtp_info) {
+  WebRtc_Word16 payload_length = static_cast<WebRtc_Word16>(length_payload);
 
   // translate to NetEq struct
-  WebRtcNetEQ_RTPInfo netEqRTPInfo;
-  netEqRTPInfo.payloadType = rtpInfo.header.payloadType;
-  netEqRTPInfo.sequenceNumber = rtpInfo.header.sequenceNumber;
-  netEqRTPInfo.timeStamp = rtpInfo.header.timestamp;
-  netEqRTPInfo.SSRC = rtpInfo.header.ssrc;
-  netEqRTPInfo.markerBit = rtpInfo.header.markerBit;
+  WebRtcNetEQ_RTPInfo neteq_rtpinfo;
+  neteq_rtpinfo.payloadType = rtp_info.header.payloadType;
+  neteq_rtpinfo.sequenceNumber = rtp_info.header.sequenceNumber;
+  neteq_rtpinfo.timeStamp = rtp_info.header.timestamp;
+  neteq_rtpinfo.SSRC = rtp_info.header.ssrc;
+  neteq_rtpinfo.markerBit = rtp_info.header.markerBit;
 
-  CriticalSectionScoped lock(_netEqCritSect);
+  CriticalSectionScoped lock(neteq_crit_sect_);
   // Down-cast the time to (32-6)-bit since we only care about
   // the least significant bits. (32-6) bits cover 2^(32-6) = 67108864 ms.
   // we masked 6 most significant bits of 32-bit so we don't loose resolution
   // when do the following multiplication.
-  const WebRtc_UWord32 nowInMs =
+  const WebRtc_UWord32 now_in_ms =
       static_cast<WebRtc_UWord32>(
           TickTime::MillisecondTimestamp() & 0x03ffffff);
-  WebRtc_UWord32 recvTimestamp = static_cast<WebRtc_UWord32>(
-      _currentSampFreqKHz * nowInMs);
+  WebRtc_UWord32 recv_timestamp = static_cast<WebRtc_UWord32>(
+      current_samp_freq_khz_ * now_in_ms);
 
   int status;
   // In case of stereo payload, first half of the data should be pushed into
   // master, and the second half into slave.
-  if (rtpInfo.type.Audio.channel == 2) {
+  if (rtp_info.type.Audio.channel == 2) {
     payload_length = payload_length / 2;
   }
 
   // Check that master is initialized.
-  if (!_isInitialized[0]) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if (!is_initialized_[0]) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "RecIn: NetEq is not initialized.");
     return -1;
   }
   // PUSH into Master
-  status = WebRtcNetEQ_RecInRTPStruct(_inst[0], &netEqRTPInfo, incomingPayload,
-                                      payload_length, recvTimestamp);
+  status = WebRtcNetEQ_RecInRTPStruct(inst_[0], &neteq_rtpinfo,
+                                      incoming_payload, payload_length,
+                                      recv_timestamp);
   if (status < 0) {
     LogError("RecInRTPStruct", 0);
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "RecIn: NetEq, error in pushing in Master");
     return -1;
   }
 
   // If the received stream is stereo, insert second half of paket into slave.
-  if (rtpInfo.type.Audio.channel == 2) {
-    if (!_isInitialized[1]) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if (rtp_info.type.Audio.channel == 2) {
+    if (!is_initialized_[1]) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "RecIn: NetEq is not initialized.");
       return -1;
     }
     // PUSH into Slave
-    status = WebRtcNetEQ_RecInRTPStruct(_inst[1], &netEqRTPInfo,
-                                        &incomingPayload[payload_length],
-                                        payload_length, recvTimestamp);
+    status = WebRtcNetEQ_RecInRTPStruct(inst_[1], &neteq_rtpinfo,
+                                        &incoming_payload[payload_length],
+                                        payload_length, recv_timestamp);
     if (status < 0) {
       LogError("RecInRTPStruct", 1);
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "RecIn: NetEq, error in pushing in Slave");
       return -1;
     }
@@ -472,183 +476,185 @@
   return 0;
 }
 
-WebRtc_Word32 ACMNetEQ::RecOut(AudioFrame& audioFrame) {
+WebRtc_Word32 ACMNetEQ::RecOut(AudioFrame& audio_frame) {
   enum WebRtcNetEQOutputType type;
-  WebRtc_Word16 payloadLenSample;
-  enum WebRtcNetEQOutputType typeMaster;
-  enum WebRtcNetEQOutputType typeSlave;
+  WebRtc_Word16 payload_len_sample;
+  enum WebRtcNetEQOutputType type_master;
+  enum WebRtcNetEQOutputType type_slave;
 
-  WebRtc_Word16 payloadLenSampleSlave;
+  WebRtc_Word16 payload_len_sample_slave;
 
-  CriticalSectionScoped lockNetEq(_netEqCritSect);
+  CriticalSectionScoped lockNetEq(neteq_crit_sect_);
 
-  if (!_receivedStereo) {
-    if (!_isInitialized[0]) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if (!received_stereo_) {
+    if (!is_initialized_[0]) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "RecOut: NetEq is not initialized.");
       return -1;
     }
     {
-      WriteLockScoped lockCodec(*_decodeLock);
-      if (WebRtcNetEQ_RecOut(_inst[0], &(audioFrame.data_[0]),
-                             &payloadLenSample) != 0) {
+      WriteLockScoped lockCodec(*decode_lock_);
+      if (WebRtcNetEQ_RecOut(inst_[0], &(audio_frame.data_[0]),
+                             &payload_len_sample) != 0) {
         LogError("RecOut", 0);
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "RecOut: NetEq, error in pulling out for mono case");
 
         // Check for errors that can be recovered from:
         // RECOUT_ERROR_SAMPLEUNDERRUN = 2003
-        int errorCode = WebRtcNetEQ_GetErrorCode(_inst[0]);
-        if (errorCode != 2003) {
+        int error_code = WebRtcNetEQ_GetErrorCode(inst_[0]);
+        if (error_code != 2003) {
           // Cannot recover; return an error
           return -1;
         }
       }
     }
-    WebRtcNetEQ_GetSpeechOutputType(_inst[0], &type);
-    audioFrame.num_channels_ = 1;
+    WebRtcNetEQ_GetSpeechOutputType(inst_[0], &type);
+    audio_frame.num_channels_ = 1;
   } else {
-    if (!_isInitialized[0] || !_isInitialized[1]) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    if (!is_initialized_[0] || !is_initialized_[1]) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "RecOut: NetEq is not initialized.");
       return -1;
     }
-    WebRtc_Word16 payloadMaster[480];
-    WebRtc_Word16 payloadSlave[480];
+    WebRtc_Word16 payload_master[480];
+    WebRtc_Word16 payload_slave[480];
     {
-      WriteLockScoped lockCodec(*_decodeLock);
-      if (WebRtcNetEQ_RecOutMasterSlave(_inst[0], payloadMaster,
-                                        &payloadLenSample, _masterSlaveInfo, 1)
-          != 0) {
+      WriteLockScoped lockCodec(*decode_lock_);
+      if (WebRtcNetEQ_RecOutMasterSlave(inst_[0], payload_master,
+                                        &payload_len_sample, master_slave_info_,
+                                        1) != 0) {
         LogError("RecOutMasterSlave", 0);
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "RecOut: NetEq, error in pulling out for master");
 
         // Check for errors that can be recovered from:
         // RECOUT_ERROR_SAMPLEUNDERRUN = 2003
-        int errorCode = WebRtcNetEQ_GetErrorCode(_inst[0]);
-        if (errorCode != 2003) {
+        int error_code = WebRtcNetEQ_GetErrorCode(inst_[0]);
+        if (error_code != 2003) {
           // Cannot recover; return an error
           return -1;
         }
       }
-      if (WebRtcNetEQ_RecOutMasterSlave(_inst[1], payloadSlave,
-                                        &payloadLenSampleSlave,
-                                        _masterSlaveInfo, 0) != 0) {
+      if (WebRtcNetEQ_RecOutMasterSlave(inst_[1], payload_slave,
+                                        &payload_len_sample_slave,
+                                        master_slave_info_, 0) != 0) {
         LogError("RecOutMasterSlave", 1);
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "RecOut: NetEq, error in pulling out for slave");
 
         // Check for errors that can be recovered from:
         // RECOUT_ERROR_SAMPLEUNDERRUN = 2003
-        int errorCode = WebRtcNetEQ_GetErrorCode(_inst[1]);
-        if (errorCode != 2003) {
+        int error_code = WebRtcNetEQ_GetErrorCode(inst_[1]);
+        if (error_code != 2003) {
           // Cannot recover; return an error
           return -1;
         }
       }
     }
 
-    if (payloadLenSample != payloadLenSampleSlave) {
-      WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, _id,
-          "RecOut: mismatch between the lenght of the decoded audio by Master "
-          "(%d samples) and Slave (%d samples).",
-          payloadLenSample, payloadLenSampleSlave);
-      if (payloadLenSample > payloadLenSampleSlave) {
-        memset(&payloadSlave[payloadLenSampleSlave], 0,
-            (payloadLenSample - payloadLenSampleSlave) * sizeof(WebRtc_Word16));
+    if (payload_len_sample != payload_len_sample_slave) {
+      WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, id_,
+                   "RecOut: mismatch between the lenght of the decoded audio "
+                   "by Master (%d samples) and Slave (%d samples).",
+                   payload_len_sample, payload_len_sample_slave);
+      if (payload_len_sample > payload_len_sample_slave) {
+        memset(&payload_slave[payload_len_sample_slave], 0,
+               (payload_len_sample - payload_len_sample_slave) *
+               sizeof(WebRtc_Word16));
       }
     }
 
-    for (WebRtc_Word16 n = 0; n < payloadLenSample; n++) {
-      audioFrame.data_[n << 1] = payloadMaster[n];
-      audioFrame.data_[(n << 1) + 1] = payloadSlave[n];
+    for (WebRtc_Word16 n = 0; n < payload_len_sample; n++) {
+      audio_frame.data_[n << 1] = payload_master[n];
+      audio_frame.data_[(n << 1) + 1] = payload_slave[n];
     }
-    audioFrame.num_channels_ = 2;
+    audio_frame.num_channels_ = 2;
 
-    WebRtcNetEQ_GetSpeechOutputType(_inst[0], &typeMaster);
-    WebRtcNetEQ_GetSpeechOutputType(_inst[1], &typeSlave);
-    if ((typeMaster == kOutputNormal) || (typeSlave == kOutputNormal)) {
+    WebRtcNetEQ_GetSpeechOutputType(inst_[0], &type_master);
+    WebRtcNetEQ_GetSpeechOutputType(inst_[1], &type_slave);
+    if ((type_master == kOutputNormal) || (type_slave == kOutputNormal)) {
       type = kOutputNormal;
     } else {
-      type = typeMaster;
+      type = type_master;
     }
   }
 
-  audioFrame.samples_per_channel_ =
-      static_cast<WebRtc_UWord16>(payloadLenSample);
+  audio_frame.samples_per_channel_ =
+      static_cast<WebRtc_UWord16>(payload_len_sample);
   // NetEq always returns 10 ms of audio.
-  _currentSampFreqKHz =
-      static_cast<float>(audioFrame.samples_per_channel_) / 10.0f;
-  audioFrame.sample_rate_hz_ = audioFrame.samples_per_channel_ * 100;
-  if (_vadStatus) {
+  current_samp_freq_khz_ =
+      static_cast<float>(audio_frame.samples_per_channel_) / 10.0f;
+  audio_frame.sample_rate_hz_ = audio_frame.samples_per_channel_ * 100;
+  if (vad_status_) {
     if (type == kOutputVADPassive) {
-      audioFrame.vad_activity_ = AudioFrame::kVadPassive;
-      audioFrame.speech_type_ = AudioFrame::kNormalSpeech;
+      audio_frame.vad_activity_ = AudioFrame::kVadPassive;
+      audio_frame.speech_type_ = AudioFrame::kNormalSpeech;
     } else if (type == kOutputNormal) {
-      audioFrame.vad_activity_ = AudioFrame::kVadActive;
-      audioFrame.speech_type_ = AudioFrame::kNormalSpeech;
+      audio_frame.vad_activity_ = AudioFrame::kVadActive;
+      audio_frame.speech_type_ = AudioFrame::kNormalSpeech;
     } else if (type == kOutputPLC) {
-      audioFrame.vad_activity_ = _previousAudioActivity;
-      audioFrame.speech_type_ = AudioFrame::kPLC;
+      audio_frame.vad_activity_ = previous_audio_activity_;
+      audio_frame.speech_type_ = AudioFrame::kPLC;
     } else if (type == kOutputCNG) {
-      audioFrame.vad_activity_ = AudioFrame::kVadPassive;
-      audioFrame.speech_type_ = AudioFrame::kCNG;
+      audio_frame.vad_activity_ = AudioFrame::kVadPassive;
+      audio_frame.speech_type_ = AudioFrame::kCNG;
     } else {
-      audioFrame.vad_activity_ = AudioFrame::kVadPassive;
-      audioFrame.speech_type_ = AudioFrame::kPLCCNG;
+      audio_frame.vad_activity_ = AudioFrame::kVadPassive;
+      audio_frame.speech_type_ = AudioFrame::kPLCCNG;
     }
   } else {
     // Always return kVadUnknown when receive VAD is inactive
-    audioFrame.vad_activity_ = AudioFrame::kVadUnknown;
+    audio_frame.vad_activity_ = AudioFrame::kVadUnknown;
     if (type == kOutputNormal) {
-      audioFrame.speech_type_ = AudioFrame::kNormalSpeech;
+      audio_frame.speech_type_ = AudioFrame::kNormalSpeech;
     } else if (type == kOutputPLC) {
-      audioFrame.speech_type_ = AudioFrame::kPLC;
+      audio_frame.speech_type_ = AudioFrame::kPLC;
     } else if (type == kOutputPLCtoCNG) {
-      audioFrame.speech_type_ = AudioFrame::kPLCCNG;
+      audio_frame.speech_type_ = AudioFrame::kPLCCNG;
     } else if (type == kOutputCNG) {
-      audioFrame.speech_type_ = AudioFrame::kCNG;
+      audio_frame.speech_type_ = AudioFrame::kCNG;
     } else {
       // type is kOutputVADPassive which
-      // we don't expect to get if _vadStatus is false
-      WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, _id,
-          "RecOut: NetEq returned kVadPassive while _vadStatus is false.");
-      audioFrame.vad_activity_ = AudioFrame::kVadUnknown;
-      audioFrame.speech_type_ = AudioFrame::kNormalSpeech;
+      // we don't expect to get if vad_status_ is false
+      WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, id_,
+                   "RecOut: NetEq returned kVadPassive while vad_status_ is "
+                   "false.");
+      audio_frame.vad_activity_ = AudioFrame::kVadUnknown;
+      audio_frame.speech_type_ = AudioFrame::kNormalSpeech;
     }
   }
-  _previousAudioActivity = audioFrame.vad_activity_;
+  previous_audio_activity_ = audio_frame.vad_activity_;
 
   return 0;
 }
 
-// When ACMGenericCodec has set the codec specific parameters in codecDef
+// When ACMGenericCodec has set the codec specific parameters in codec_def
 // it calls AddCodec() to add the new codec to the NetEQ database.
-WebRtc_Word32 ACMNetEQ::AddCodec(WebRtcNetEQ_CodecDef* codecDef,
-                                 bool toMaster) {
-  if (codecDef == NULL) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-                 "ACMNetEQ::AddCodec: error, codecDef is NULL");
+WebRtc_Word32 ACMNetEQ::AddCodec(WebRtcNetEQ_CodecDef* codec_def,
+                                 bool to_master) {
+  if (codec_def == NULL) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                 "ACMNetEQ::AddCodec: error, codec_def is NULL");
     return -1;
   }
-  CriticalSectionScoped lock(_netEqCritSect);
+  CriticalSectionScoped lock(neteq_crit_sect_);
 
   WebRtc_Word16 idx;
-  if (toMaster) {
+  if (to_master) {
     idx = 0;
   } else {
     idx = 1;
   }
 
-  if (!_isInitialized[idx]) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if (!is_initialized_[idx]) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "ACMNetEQ::AddCodec: NetEq is not initialized.");
     return -1;
   }
-  if (WebRtcNetEQ_CodecDbAdd(_inst[idx], codecDef) < 0) {
+  if (WebRtcNetEQ_CodecDbAdd(inst_[idx], codec_def) < 0) {
     LogError("CodecDB_Add", idx);
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "ACMNetEQ::AddCodec: NetEq, error in adding codec");
     return -1;
   } else {
@@ -658,65 +664,69 @@
 
 // Creates a Word16 RTP packet out of a Word8 payload and an rtp info struct.
 // Must be byte order safe.
-void ACMNetEQ::RTPPack(WebRtc_Word16* rtpPacket, const WebRtc_Word8* payload,
-                       const WebRtc_Word32 payloadLengthW8,
-                       const WebRtcRTPHeader& rtpInfo) {
+void ACMNetEQ::RTPPack(WebRtc_Word16* rtp_packet, const WebRtc_Word8* payload,
+                       const WebRtc_Word32 payload_length_bytes,
+                       const WebRtcRTPHeader& rtp_info) {
   WebRtc_Word32 idx = 0;
-  WEBRTC_SPL_SET_BYTE(rtpPacket, (WebRtc_Word8) 0x80, idx);
+  WEBRTC_SPL_SET_BYTE(rtp_packet, (WebRtc_Word8) 0x80, idx);
   idx++;
-  WEBRTC_SPL_SET_BYTE(rtpPacket, rtpInfo.header.payloadType, idx);
+  WEBRTC_SPL_SET_BYTE(rtp_packet, rtp_info.header.payloadType, idx);
   idx++;
-  WEBRTC_SPL_SET_BYTE(rtpPacket,
-                      WEBRTC_SPL_GET_BYTE(&(rtpInfo.header.sequenceNumber), 1),
+  WEBRTC_SPL_SET_BYTE(rtp_packet,
+                      WEBRTC_SPL_GET_BYTE(&(rtp_info.header.sequenceNumber), 1),
                       idx);
   idx++;
-  WEBRTC_SPL_SET_BYTE(rtpPacket,
-                      WEBRTC_SPL_GET_BYTE(&(rtpInfo.header.sequenceNumber), 0),
+  WEBRTC_SPL_SET_BYTE(rtp_packet,
+                      WEBRTC_SPL_GET_BYTE(&(rtp_info.header.sequenceNumber), 0),
                       idx);
   idx++;
-  WEBRTC_SPL_SET_BYTE(rtpPacket,
-                      WEBRTC_SPL_GET_BYTE(&(rtpInfo.header.timestamp), 3), idx);
-  idx++;
-  WEBRTC_SPL_SET_BYTE(rtpPacket,
-                      WEBRTC_SPL_GET_BYTE(&(rtpInfo.header.timestamp), 2), idx);
-  idx++;
-  WEBRTC_SPL_SET_BYTE(rtpPacket,
-                      WEBRTC_SPL_GET_BYTE(&(rtpInfo.header.timestamp), 1), idx);
-  idx++;
-  WEBRTC_SPL_SET_BYTE(rtpPacket,
-                      WEBRTC_SPL_GET_BYTE(&(rtpInfo.header.timestamp), 0), idx);
-  idx++;
-  WEBRTC_SPL_SET_BYTE(rtpPacket, WEBRTC_SPL_GET_BYTE(&(rtpInfo.header.ssrc), 3),
+  WEBRTC_SPL_SET_BYTE(rtp_packet,
+                      WEBRTC_SPL_GET_BYTE(&(rtp_info.header.timestamp), 3),
                       idx);
   idx++;
-  WEBRTC_SPL_SET_BYTE(rtpPacket, WEBRTC_SPL_GET_BYTE(&(rtpInfo.header.ssrc), 2),
+  WEBRTC_SPL_SET_BYTE(rtp_packet,
+                      WEBRTC_SPL_GET_BYTE(&(rtp_info.header.timestamp), 2),
                       idx);
   idx++;
-  WEBRTC_SPL_SET_BYTE(rtpPacket, WEBRTC_SPL_GET_BYTE(&(rtpInfo.header.ssrc), 1),
+  WEBRTC_SPL_SET_BYTE(rtp_packet,
+                      WEBRTC_SPL_GET_BYTE(&(rtp_info.header.timestamp), 1),
                       idx);
   idx++;
-  WEBRTC_SPL_SET_BYTE(rtpPacket, WEBRTC_SPL_GET_BYTE(&(rtpInfo.header.ssrc), 0),
+  WEBRTC_SPL_SET_BYTE(rtp_packet,
+                      WEBRTC_SPL_GET_BYTE(&(rtp_info.header.timestamp), 0),
                       idx);
   idx++;
-  for (WebRtc_Word16 i = 0; i < payloadLengthW8; i++) {
-    WEBRTC_SPL_SET_BYTE(rtpPacket, payload[i], idx);
+  WEBRTC_SPL_SET_BYTE(rtp_packet,
+                      WEBRTC_SPL_GET_BYTE(&(rtp_info.header.ssrc), 3), idx);
+  idx++;
+  WEBRTC_SPL_SET_BYTE(rtp_packet, WEBRTC_SPL_GET_BYTE(&(rtp_info.header.ssrc),
+                                                      2), idx);
+  idx++;
+  WEBRTC_SPL_SET_BYTE(rtp_packet, WEBRTC_SPL_GET_BYTE(&(rtp_info.header.ssrc),
+                                                      1), idx);
+  idx++;
+  WEBRTC_SPL_SET_BYTE(rtp_packet, WEBRTC_SPL_GET_BYTE(&(rtp_info.header.ssrc),
+                                                      0), idx);
+  idx++;
+  for (WebRtc_Word16 i = 0; i < payload_length_bytes; i++) {
+    WEBRTC_SPL_SET_BYTE(rtp_packet, payload[i], idx);
     idx++;
   }
-  if (payloadLengthW8 & 1) {
+  if (payload_length_bytes & 1) {
     // Our 16 bits buffer is one byte too large, set that
     // last byte to zero.
-    WEBRTC_SPL_SET_BYTE(rtpPacket, 0x0, idx);
+    WEBRTC_SPL_SET_BYTE(rtp_packet, 0x0, idx);
   }
 }
 
 WebRtc_Word16 ACMNetEQ::EnableVAD() {
-  CriticalSectionScoped lock(_netEqCritSect);
-  if (_vadStatus) {
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  if (vad_status_) {
     return 0;
   }
-  for (WebRtc_Word16 idx = 0; idx < _numSlaves + 1; idx++) {
-    if (!_isInitialized[idx]) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  for (WebRtc_Word16 idx = 0; idx < num_slaves_ + 1; idx++) {
+    if (!is_initialized_[idx]) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "SetVADStatus: NetEq is not initialized.");
       return -1;
     }
@@ -726,50 +736,50 @@
     }
 
     // Set previous VAD status to PASSIVE
-    _previousAudioActivity = AudioFrame::kVadPassive;
+    previous_audio_activity_ = AudioFrame::kVadPassive;
   }
-  _vadStatus = true;
+  vad_status_ = true;
   return 0;
 }
 
-ACMVADMode ACMNetEQ::VADMode() const {
-  CriticalSectionScoped lock(_netEqCritSect);
-  return _vadMode;
+ACMVADMode ACMNetEQ::vad_mode() const {
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  return vad_mode_;
 }
 
 WebRtc_Word16 ACMNetEQ::SetVADMode(const ACMVADMode mode) {
-  CriticalSectionScoped lock(_netEqCritSect);
+  CriticalSectionScoped lock(neteq_crit_sect_);
   if ((mode < VADNormal) || (mode > VADVeryAggr)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "SetVADMode: NetEq error: could not set VAD mode, mode is not "
                  "supported");
     return -1;
   } else {
-    for (WebRtc_Word16 idx = 0; idx < _numSlaves + 1; idx++) {
-      if (!_isInitialized[idx]) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    for (WebRtc_Word16 idx = 0; idx < num_slaves_ + 1; idx++) {
+      if (!is_initialized_[idx]) {
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "SetVADMode: NetEq is not initialized.");
         return -1;
       }
-      if (WebRtcNetEQ_SetVADMode(_inst[idx], mode) < 0) {
+      if (WebRtcNetEQ_SetVADMode(inst_[idx], mode) < 0) {
         LogError("SetVADmode", idx);
         return -1;
       }
     }
-    _vadMode = mode;
+    vad_mode_ = mode;
     return 0;
   }
 }
 
 WebRtc_Word32 ACMNetEQ::FlushBuffers() {
-  CriticalSectionScoped lock(_netEqCritSect);
-  for (WebRtc_Word16 idx = 0; idx < _numSlaves + 1; idx++) {
-    if (!_isInitialized[idx]) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  for (WebRtc_Word16 idx = 0; idx < num_slaves_ + 1; idx++) {
+    if (!is_initialized_[idx]) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "FlushBuffers: NetEq is not initialized.");
       return -1;
     }
-    if (WebRtcNetEQ_FlushBuffers(_inst[idx]) < 0) {
+    if (WebRtcNetEQ_FlushBuffers(inst_[idx]) < 0) {
       LogError("FlushBuffers", idx);
       return -1;
     }
@@ -777,30 +787,30 @@
   return 0;
 }
 
-WebRtc_Word16 ACMNetEQ::RemoveCodec(WebRtcNetEQDecoder codecIdx,
-                                    bool isStereo) {
+WebRtc_Word16 ACMNetEQ::RemoveCodec(WebRtcNetEQDecoder codec_idx,
+                                    bool is_stereo) {
   // sanity check
-  if ((codecIdx <= kDecoderReservedStart) ||
-      (codecIdx >= kDecoderReservedEnd)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-        "RemoveCodec: NetEq error: could not Remove Codec, codec index out "
-        "of range");
+  if ((codec_idx <= kDecoderReservedStart) ||
+      (codec_idx >= kDecoderReservedEnd)) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                 "RemoveCodec: NetEq error: could not Remove Codec, codec "
+                 "index out of range");
     return -1;
   }
-  CriticalSectionScoped lock(_netEqCritSect);
-  if (!_isInitialized[0]) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  if (!is_initialized_[0]) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "RemoveCodec: NetEq is not initialized.");
     return -1;
   }
 
-  if (WebRtcNetEQ_CodecDbRemove(_inst[0], codecIdx) < 0) {
+  if (WebRtcNetEQ_CodecDbRemove(inst_[0], codec_idx) < 0) {
     LogError("CodecDB_Remove", 0);
     return -1;
   }
 
-  if (isStereo) {
-    if (WebRtcNetEQ_CodecDbRemove(_inst[1], codecIdx) < 0) {
+  if (is_stereo) {
+    if (WebRtcNetEQ_CodecDbRemove(inst_[1], codec_idx) < 0) {
       LogError("CodecDB_Remove", 1);
       return -1;
     }
@@ -811,14 +821,14 @@
 
 WebRtc_Word16 ACMNetEQ::SetBackgroundNoiseMode(
     const ACMBackgroundNoiseMode mode) {
-  CriticalSectionScoped lock(_netEqCritSect);
-  for (WebRtc_Word16 idx = 0; idx < _numSlaves + 1; idx++) {
-    if (!_isInitialized[idx]) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  for (WebRtc_Word16 idx = 0; idx < num_slaves_ + 1; idx++) {
+    if (!is_initialized_[idx]) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "SetBackgroundNoiseMode: NetEq is not initialized.");
       return -1;
     }
-    if (WebRtcNetEQ_SetBGNMode(_inst[idx], (WebRtcNetEQBGNMode) mode) < 0) {
+    if (WebRtcNetEQ_SetBGNMode(inst_[idx], (WebRtcNetEQBGNMode) mode) < 0) {
       LogError("SetBGNMode", idx);
       return -1;
     }
@@ -827,45 +837,45 @@
 }
 
 WebRtc_Word16 ACMNetEQ::BackgroundNoiseMode(ACMBackgroundNoiseMode& mode) {
-  WebRtcNetEQBGNMode myMode;
-  CriticalSectionScoped lock(_netEqCritSect);
-  if (!_isInitialized[0]) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  WebRtcNetEQBGNMode my_mode;
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  if (!is_initialized_[0]) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "BackgroundNoiseMode: NetEq is not initialized.");
     return -1;
   }
-  if (WebRtcNetEQ_GetBGNMode(_inst[0], &myMode) < 0) {
+  if (WebRtcNetEQ_GetBGNMode(inst_[0], &my_mode) < 0) {
     LogError("WebRtcNetEQ_GetBGNMode", 0);
     return -1;
   } else {
-    mode = (ACMBackgroundNoiseMode) myMode;
+    mode = (ACMBackgroundNoiseMode) my_mode;
   }
   return 0;
 }
 
-void ACMNetEQ::SetUniqueId(WebRtc_Word32 id) {
-  CriticalSectionScoped lock(_netEqCritSect);
-  _id = id;
+void ACMNetEQ::set_id(WebRtc_Word32 id) {
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  id_ = id;
 }
 
-void ACMNetEQ::LogError(const char* neteqFuncName,
+void ACMNetEQ::LogError(const char* neteq_func_name,
                         const WebRtc_Word16 idx) const {
-  char errorName[NETEQ_ERR_MSG_LEN_BYTE];
-  char myFuncName[50];
-  int neteqErrorCode = WebRtcNetEQ_GetErrorCode(_inst[idx]);
-  WebRtcNetEQ_GetErrorName(neteqErrorCode, errorName,
+  char error_name[NETEQ_ERR_MSG_LEN_BYTE];
+  char my_func_name[50];
+  int neteq_error_code = WebRtcNetEQ_GetErrorCode(inst_[idx]);
+  WebRtcNetEQ_GetErrorName(neteq_error_code, error_name,
                            NETEQ_ERR_MSG_LEN_BYTE - 1);
-  strncpy(myFuncName, neteqFuncName, 49);
-  errorName[NETEQ_ERR_MSG_LEN_BYTE - 1] = '\0';
-  myFuncName[49] = '\0';
-  WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-      "NetEq-%d Error in function %s, error-code: %d, error-string: %s", idx,
-      myFuncName, neteqErrorCode, errorName);
+  strncpy(my_func_name, neteq_func_name, 49);
+  error_name[NETEQ_ERR_MSG_LEN_BYTE - 1] = '\0';
+  my_func_name[49] = '\0';
+  WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+               "NetEq-%d Error in function %s, error-code: %d, error-string: "
+               " %s", idx, my_func_name, neteq_error_code, error_name);
 }
 
 WebRtc_Word32 ACMNetEQ::PlayoutTimestamp(WebRtc_UWord32& timestamp) {
-  CriticalSectionScoped lock(_netEqCritSect);
-  if (WebRtcNetEQ_GetSpeechTimeStamp(_inst[0], &timestamp) < 0) {
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  if (WebRtcNetEQ_GetSpeechTimeStamp(inst_[0], &timestamp) < 0) {
     LogError("GetSpeechTimeStamp", 0);
     return -1;
   } else {
@@ -874,65 +884,67 @@
 }
 
 void ACMNetEQ::RemoveSlaves() {
-  CriticalSectionScoped lock(_netEqCritSect);
+  CriticalSectionScoped lock(neteq_crit_sect_);
   RemoveSlavesSafe();
 }
 
 void ACMNetEQ::RemoveSlavesSafe() {
-  for (int i = 1; i < _numSlaves + 1; i++) {
+  for (int i = 1; i < num_slaves_ + 1; i++) {
     RemoveNetEQSafe(i);
   }
 
-  if (_masterSlaveInfo != NULL) {
-    free(_masterSlaveInfo);
-    _masterSlaveInfo = NULL;
+  if (master_slave_info_ != NULL) {
+    free(master_slave_info_);
+    master_slave_info_ = NULL;
   }
-  _numSlaves = 0;
+  num_slaves_ = 0;
 }
 
 void ACMNetEQ::RemoveNetEQSafe(int index) {
-  if (_instMem[index] != NULL) {
-    free(_instMem[index]);
-    _instMem[index] = NULL;
+  if (inst_mem_[index] != NULL) {
+    free(inst_mem_[index]);
+    inst_mem_[index] = NULL;
   }
-  if (_netEqPacketBuffer[index] != NULL) {
-    free(_netEqPacketBuffer[index]);
-    _netEqPacketBuffer[index] = NULL;
+  if (neteq_packet_buffer_[index] != NULL) {
+    free(neteq_packet_buffer_[index]);
+    neteq_packet_buffer_[index] = NULL;
   }
-  if (_ptrVADInst[index] != NULL) {
-    WebRtcVad_Free(_ptrVADInst[index]);
-    _ptrVADInst[index] = NULL;
+  if (ptr_vadinst_[index] != NULL) {
+    WebRtcVad_Free(ptr_vadinst_[index]);
+    ptr_vadinst_[index] = NULL;
   }
 }
 
-WebRtc_Word16 ACMNetEQ::AddSlave(const WebRtcNetEQDecoder* usedCodecs,
-                                 WebRtc_Word16 noOfCodecs) {
-  CriticalSectionScoped lock(_netEqCritSect);
-  const WebRtc_Word16 slaveIdx = 1;
-  if (_numSlaves < 1) {
+WebRtc_Word16 ACMNetEQ::AddSlave(const WebRtcNetEQDecoder* used_codecs,
+                                 WebRtc_Word16 num_codecs) {
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  const WebRtc_Word16 slave_idx = 1;
+  if (num_slaves_ < 1) {
     // initialize the receiver, this also sets up VAD.
-    if (InitByIdxSafe(slaveIdx) < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    if (InitByIdxSafe(slave_idx) < 0) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "AddSlave: AddSlave Failed, Could not Initialize");
       return -1;
     }
 
     // Allocate buffer.
-    if (AllocatePacketBufferByIdxSafe(usedCodecs, noOfCodecs, slaveIdx) < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-          "AddSlave: AddSlave Failed, Could not Allocate Packet Buffer");
+    if (AllocatePacketBufferByIdxSafe(used_codecs, num_codecs,
+                                      slave_idx) < 0) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                   "AddSlave: AddSlave Failed, Could not Allocate Packet "
+                   "Buffer");
       return -1;
     }
 
-    if (_masterSlaveInfo != NULL) {
-      free(_masterSlaveInfo);
-      _masterSlaveInfo = NULL;
+    if (master_slave_info_ != NULL) {
+      free(master_slave_info_);
+      master_slave_info_ = NULL;
     }
-    int msInfoSize = WebRtcNetEQ_GetMasterSlaveInfoSize();
-    _masterSlaveInfo = malloc(msInfoSize);
+    int ms_info_size = WebRtcNetEQ_GetMasterSlaveInfoSize();
+    master_slave_info_ = malloc(ms_info_size);
 
-    if (_masterSlaveInfo == NULL) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    if (master_slave_info_ == NULL) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "AddSlave: AddSlave Failed, Could not Allocate memory for "
                    "Master-Slave Info");
       return -1;
@@ -940,60 +952,62 @@
 
     // We accept this as initialized NetEQ, the rest is to synchronize
     // Slave with Master.
-    _numSlaves = 1;
-    _isInitialized[slaveIdx] = true;
+    num_slaves_ = 1;
+    is_initialized_[slave_idx] = true;
 
     // Set Slave delay as all other instances.
-    if (WebRtcNetEQ_SetExtraDelay(_inst[slaveIdx], _extraDelay) < 0) {
-      LogError("SetExtraDelay", slaveIdx);
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    if (WebRtcNetEQ_SetExtraDelay(inst_[slave_idx], extra_delay_) < 0) {
+      LogError("SetExtraDelay", slave_idx);
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "AddSlave: AddSlave Failed, Could not set delay");
       return -1;
     }
 
     // Set AVT
-    if (WebRtcNetEQ_SetAVTPlayout(_inst[slaveIdx], (_avtPlayout) ? 1 : 0) < 0) {
-      LogError("SetAVTPlayout", slaveIdx);
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    if (WebRtcNetEQ_SetAVTPlayout(inst_[slave_idx],
+                                  (avt_playout_) ? 1 : 0) < 0) {
+      LogError("SetAVTPlayout", slave_idx);
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "AddSlave: AddSlave Failed, Could not set AVT playout.");
       return -1;
     }
 
     // Set Background Noise
-    WebRtcNetEQBGNMode currentMode;
-    if (WebRtcNetEQ_GetBGNMode(_inst[0], &currentMode) < 0) {
+    WebRtcNetEQBGNMode current_mode;
+    if (WebRtcNetEQ_GetBGNMode(inst_[0], &current_mode) < 0) {
       LogError("GetBGNMode", 0);
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-          "AAddSlave: AddSlave Failed, Could not Get BGN form Master.");
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                   "AAddSlave: AddSlave Failed, Could not Get BGN form "
+                   "Master.");
       return -1;
     }
 
-    if (WebRtcNetEQ_SetBGNMode(_inst[slaveIdx],
-                               (WebRtcNetEQBGNMode) currentMode) < 0) {
-      LogError("SetBGNMode", slaveIdx);
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    if (WebRtcNetEQ_SetBGNMode(inst_[slave_idx],
+                               (WebRtcNetEQBGNMode) current_mode) < 0) {
+      LogError("SetBGNMode", slave_idx);
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "AddSlave: AddSlave Failed, Could not set BGN mode.");
       return -1;
     }
 
-    enum WebRtcNetEQPlayoutMode playoutMode = kPlayoutOff;
-    switch (_playoutMode) {
+    enum WebRtcNetEQPlayoutMode playout_mode = kPlayoutOff;
+    switch (playout_mode_) {
       case voice:
-        playoutMode = kPlayoutOn;
+        playout_mode = kPlayoutOn;
         break;
       case fax:
-        playoutMode = kPlayoutFax;
+        playout_mode = kPlayoutFax;
         break;
       case streaming:
-        playoutMode = kPlayoutStreaming;
+        playout_mode = kPlayoutStreaming;
         break;
       case off:
-        playoutMode = kPlayoutOff;
+        playout_mode = kPlayoutOff;
         break;
     }
-    if (WebRtcNetEQ_SetPlayoutMode(_inst[slaveIdx], playoutMode) < 0) {
+    if (WebRtcNetEQ_SetPlayoutMode(inst_[slave_idx], playout_mode) < 0) {
       LogError("SetPlayoutMode", 1);
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "AddSlave: AddSlave Failed, Could not Set Playout Mode.");
       return -1;
     }
@@ -1002,14 +1016,14 @@
   return 0;
 }
 
-void ACMNetEQ::SetReceivedStereo(bool receivedStereo) {
-  CriticalSectionScoped lock(_netEqCritSect);
-  _receivedStereo = receivedStereo;
+void ACMNetEQ::set_received_stereo(bool received_stereo) {
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  received_stereo_ = received_stereo;
 }
 
-WebRtc_UWord8 ACMNetEQ::NumSlaves() {
-  CriticalSectionScoped lock(_netEqCritSect);
-  return _numSlaves;
+WebRtc_UWord8 ACMNetEQ::num_slaves() {
+  CriticalSectionScoped lock(neteq_crit_sect_);
+  return num_slaves_;
 }
 
 }  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_neteq.h b/webrtc/modules/audio_coding/main/source/acm_neteq.h
index 0086460..1ee4309 100644
--- a/webrtc/modules/audio_coding/main/source/acm_neteq.h
+++ b/webrtc/modules/audio_coding/main/source/acm_neteq.h
@@ -11,26 +11,29 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_NETEQ_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_NETEQ_H_
 
-#include "audio_coding_module.h"
-#include "audio_coding_module_typedefs.h"
-#include "engine_configurations.h"
-#include "module_common_types.h"
-#include "typedefs.h"
-#include "webrtc_neteq.h"
-#include "webrtc_vad.h"
+#include "webrtc/common_audio/vad/include/webrtc_vad.h"
+#include "webrtc/engine_configurations.h"
+#include "webrtc/modules/audio_coding/main/interface/audio_coding_module.h"
+#include "webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/interface/module_common_types.h"
+#include "webrtc/typedefs.h"
 
 namespace webrtc {
 
 class CriticalSectionWrapper;
 class RWLockWrapper;
 struct CodecInst;
-enum AudioPlayoutMode;
-enum ACMSpeechType;
 
 #define MAX_NUM_SLAVE_NETEQ 1
 
 class ACMNetEQ {
  public:
+  enum JitterBuffer {
+    kMasterJb = 0,
+    kSlaveJb = 1
+  };
+
   // Constructor of the class
   ACMNetEQ();
 
@@ -41,9 +44,9 @@
   // Init()
   // Allocates memory for NetEQ and VAD and initializes them.
   //
-  // Return value              : 0 if ok.
-  //                            -1 if NetEQ or VAD returned an error or
-  //                            if out of memory.
+  // Return value             : 0 if ok.
+  //                           -1 if NetEQ or VAD returned an error or
+  //                           if out of memory.
   //
   WebRtc_Word32 Init();
 
@@ -52,82 +55,83 @@
   // Gives the payload to NetEQ.
   //
   // Input:
-  //   - incomingPayload      : Incoming audio payload.
-  //   - payloadLength        : Length of incoming audio payload.
-  //   - rtpInfo              : RTP header for the incoming payload containing
+  //   - incoming_payload     : Incoming audio payload.
+  //   - length_payload       : Length of incoming audio payload.
+  //   - rtp_info             : RTP header for the incoming payload containing
   //                            information about payload type, sequence number,
-  //                            timestamp, ssrc and marker bit.
+  //                            timestamp, SSRC and marker bit.
   //
   // Return value             : 0 if ok.
   //                           <0 if NetEQ returned an error.
   //
-  WebRtc_Word32 RecIn(const WebRtc_UWord8* incomingPayload,
-                      const WebRtc_Word32 payloadLength,
-                      const WebRtcRTPHeader& rtpInfo);
+  WebRtc_Word32 RecIn(const WebRtc_UWord8* incoming_payload,
+                      const WebRtc_Word32 length_payload,
+                      const WebRtcRTPHeader& rtp_info);
 
   //
   // RecOut()
   // Asks NetEQ for 10 ms of decoded audio.
   //
   // Input:
-  //   -audioFrame             : an audio frame were output data and
-  //                             associated parameters are written to.
+  //   -audio_frame           : an audio frame were output data and
+  //                            associated parameters are written to.
   //
-  // Return value              : 0 if ok.
-  //                            -1 if NetEQ returned an error.
+  // Return value             : 0 if ok.
+  //                           -1 if NetEQ returned an error.
   //
-  WebRtc_Word32 RecOut(AudioFrame& audioFrame);
+  WebRtc_Word32 RecOut(AudioFrame& audio_frame);
 
   //
   // AddCodec()
   // Adds a new codec to the NetEQ codec database.
   //
   // Input:
-  //   - codecDef              : The codec to be added.
-  //   - toMaster              : true if the codec has to be added to Master
-  //                             NetEq, otherwise will be added to the Slave
-  //                             NetEQ.
+  //   - codec_def            : The codec to be added.
+  //   - to_master            : true if the codec has to be added to Master
+  //                            NetEq, otherwise will be added to the Slave
+  //                            NetEQ.
   //
-  // Return value              : 0 if ok.
-  //                            <0 if NetEQ returned an error.
+  // Return value             : 0 if ok.
+  //                           <0 if NetEQ returned an error.
   //
-  WebRtc_Word32 AddCodec(WebRtcNetEQ_CodecDef *codecDef, bool toMaster = true);
+  WebRtc_Word32 AddCodec(WebRtcNetEQ_CodecDef *codec_def,
+                         bool to_master = true);
 
   //
   // AllocatePacketBuffer()
   // Allocates the NetEQ packet buffer.
   //
   // Input:
-  //   - usedCodecs            : An array of the codecs to be used by NetEQ.
-  //   - noOfCodecs            : Number of codecs in usedCodecs.
+  //   - used_codecs          : An array of the codecs to be used by NetEQ.
+  //   - num_codecs           : Number of codecs in used_codecs.
   //
-  // Return value              : 0 if ok.
-  //                            <0 if NetEQ returned an error.
+  // Return value             : 0 if ok.
+  //                           <0 if NetEQ returned an error.
   //
-  WebRtc_Word32 AllocatePacketBuffer(const WebRtcNetEQDecoder* usedCodecs,
-                                     WebRtc_Word16 noOfCodecs);
+  WebRtc_Word32 AllocatePacketBuffer(const WebRtcNetEQDecoder* used_codecs,
+                                     WebRtc_Word16 num_codecs);
 
   //
   // SetExtraDelay()
-  // Sets an delayInMS milliseconds extra delay in NetEQ.
+  // Sets a |delay_in_ms| milliseconds extra delay in NetEQ.
   //
   // Input:
-  //   - delayInMS             : Extra delay in milliseconds.
+  //   - delay_in_ms          : Extra delay in milliseconds.
   //
-  // Return value              : 0 if ok.
-  //                            <0 if NetEQ returned an error.
+  // Return value             : 0 if ok.
+  //                           <0 if NetEQ returned an error.
   //
-  WebRtc_Word32 SetExtraDelay(const WebRtc_Word32 delayInMS);
+  WebRtc_Word32 SetExtraDelay(const WebRtc_Word32 delay_in_ms);
 
   //
   // SetAVTPlayout()
   // Enable/disable playout of AVT payloads.
   //
   // Input:
-  //   - enable                : Enable if true, disable if false.
+  //   - enable               : Enable if true, disable if false.
   //
-  // Return value              : 0 if ok.
-  //                            <0 if NetEQ returned an error.
+  // Return value             : 0 if ok.
+  //                           <0 if NetEQ returned an error.
   //
   WebRtc_Word32 SetAVTPlayout(const bool enable);
 
@@ -135,16 +139,16 @@
   // AVTPlayout()
   // Get the current AVT playout state.
   //
-  // Return value              : True if AVT playout is enabled.
-  //                             False if AVT playout is disabled.
+  // Return value             : True if AVT playout is enabled.
+  //                            False if AVT playout is disabled.
   //
-  bool AVTPlayout() const;
+  bool avt_playout() const;
 
   //
   // CurrentSampFreqHz()
   // Get the current sampling frequency in Hz.
   //
-  // Return value              : Sampling frequency in Hz.
+  // Return value             : Sampling frequency in Hz.
   //
   WebRtc_Word32 CurrentSampFreqHz() const;
 
@@ -153,11 +157,11 @@
   // Sets the playout mode to voice or fax.
   //
   // Input:
-  //   - mode                  : The playout mode to be used, voice,
-  //                             fax, or streaming.
+  //   - mode                 : The playout mode to be used, voice,
+  //                            fax, or streaming.
   //
-  // Return value              : 0 if ok.
-  //                            <0 if NetEQ returned an error.
+  // Return value             : 0 if ok.
+  //                           <0 if NetEQ returned an error.
   //
   WebRtc_Word32 SetPlayoutMode(const AudioPlayoutMode mode);
 
@@ -165,19 +169,19 @@
   // PlayoutMode()
   // Get the current playout mode.
   //
-  // Return value              : The current playout mode.
+  // Return value             : The current playout mode.
   //
-  AudioPlayoutMode PlayoutMode() const;
+  AudioPlayoutMode playout_mode() const;
 
   //
   // NetworkStatistics()
   // Get the current network statistics from NetEQ.
   //
   // Output:
-  //   - statistics            : The current network statistics.
+  //   - statistics           : The current network statistics.
   //
-  // Return value              : 0 if ok.
-  //                            <0 if NetEQ returned an error.
+  // Return value             : 0 if ok.
+  //                           <0 if NetEQ returned an error.
   //
   WebRtc_Word32 NetworkStatistics(ACMNetworkStatistics* statistics) const;
 
@@ -185,19 +189,19 @@
   // VADMode()
   // Get the current VAD Mode.
   //
-  // Return value              : The current VAD mode.
+  // Return value             : The current VAD mode.
   //
-  ACMVADMode VADMode() const;
+  ACMVADMode vad_mode() const;
 
   //
   // SetVADMode()
   // Set the VAD mode.
   //
   // Input:
-  //   - mode                  : The new VAD mode.
+  //   - mode                 : The new VAD mode.
   //
-  // Return value              : 0 if ok.
-  //                            -1 if an error occurred.
+  // Return value             : 0 if ok.
+  //                           -1 if an error occurred.
   //
   WebRtc_Word16 SetVADMode(const ACMVADMode mode);
 
@@ -205,18 +209,18 @@
   // DecodeLock()
   // Get the decode lock used to protect decoder instances while decoding.
   //
-  // Return value              : Pointer to the decode lock.
+  // Return value             : Pointer to the decode lock.
   //
   RWLockWrapper* DecodeLock() const {
-    return _decodeLock;
+    return decode_lock_;
   }
 
   //
   // FlushBuffers()
   // Flushes the NetEQ packet and speech buffers.
   //
-  // Return value              : 0 if ok.
-  //                            -1 if NetEQ returned an error.
+  // Return value             : 0 if ok.
+  //                           -1 if NetEQ returned an error.
   //
   WebRtc_Word32 FlushBuffers();
 
@@ -225,23 +229,24 @@
   // Removes a codec from the NetEQ codec database.
   //
   // Input:
-  //   - codecIdx              : Codec to be removed.
+  //   - codec_idx            : Codec to be removed.
   //
-  // Return value              : 0 if ok.
-  //                            -1 if an error occurred.
+  // Return value             : 0 if ok.
+  //                           -1 if an error occurred.
   //
-  WebRtc_Word16 RemoveCodec(WebRtcNetEQDecoder codecIdx, bool isStereo = false);
+  WebRtc_Word16 RemoveCodec(WebRtcNetEQDecoder codec_idx,
+                            bool is_stereo = false);
 
   //
   // SetBackgroundNoiseMode()
   // Set the mode of the background noise.
   //
   // Input:
-  //   - mode                  : an enumerator specifying the mode of the
-  //                             background noise.
+  //   - mode                 : an enumerator specifying the mode of the
+  //                            background noise.
   //
-  // Return value              : 0 if succeeded,
-  //                            -1 if failed to set the mode.
+  // Return value             : 0 if succeeded,
+  //                           -1 if failed to set the mode.
   //
   WebRtc_Word16 SetBackgroundNoiseMode(const ACMBackgroundNoiseMode mode);
 
@@ -249,28 +254,23 @@
   // BackgroundNoiseMode()
   // return the mode of the background noise.
   //
-  // Return value              : The mode of background noise.
+  // Return value             : The mode of background noise.
   //
   WebRtc_Word16 BackgroundNoiseMode(ACMBackgroundNoiseMode& mode);
 
-  void SetUniqueId(WebRtc_Word32 id);
+  void set_id(WebRtc_Word32 id);
 
   WebRtc_Word32 PlayoutTimestamp(WebRtc_UWord32& timestamp);
 
-  void SetReceivedStereo(bool receivedStereo);
+  void set_received_stereo(bool received_stereo);
 
-  WebRtc_UWord8 NumSlaves();
-
-  enum JB {
-    masterJB = 0,
-    slaveJB = 1
-  };
+  WebRtc_UWord8 num_slaves();
 
   // Delete all slaves.
   void RemoveSlaves();
 
-  WebRtc_Word16 AddSlave(const WebRtcNetEQDecoder* usedCodecs,
-                         WebRtc_Word16 noOfCodecs);
+  WebRtc_Word16 AddSlave(const WebRtcNetEQDecoder* used_codecs,
+                         WebRtc_Word16 num_codecs);
 
  private:
   //
@@ -279,34 +279,35 @@
   // a WebRtcRTPHeader.
   //
   // Input:
-  //   - payload               : Payload to be packetized.
-  //   - payloadLengthW8       : Length of the payload in bytes.
-  //   - rtpInfo               : RTP header struct.
+  //   - payload              : Payload to be packetized.
+  //   - payload_length_bytes : Length of the payload in bytes.
+  //   - rtp_info             : RTP header structure.
   //
   // Output:
-  //   - rtpPacket             : The RTP packet.
+  //   - rtp_packet           : The RTP packet.
   //
-  static void RTPPack(WebRtc_Word16* rtpPacket, const WebRtc_Word8* payload,
-                      const WebRtc_Word32 payloadLengthW8,
-                      const WebRtcRTPHeader& rtpInfo);
+  static void RTPPack(WebRtc_Word16* rtp_packet, const WebRtc_Word8* payload,
+                      const WebRtc_Word32 payload_length_bytes,
+                      const WebRtcRTPHeader& rtp_info);
 
-  void LogError(const char* neteqFuncName, const WebRtc_Word16 idx) const;
+  void LogError(const char* neteq_func_name, const WebRtc_Word16 idx) const;
 
   WebRtc_Word16 InitByIdxSafe(const WebRtc_Word16 idx);
 
+  //
   // EnableVAD()
   // Enable VAD.
   //
-  // Return value              : 0 if ok.
-  //                            -1 if an error occurred.
+  // Return value             : 0 if ok.
+  //                           -1 if an error occurred.
   //
   WebRtc_Word16 EnableVAD();
 
   WebRtc_Word16 EnableVADByIdxSafe(const WebRtc_Word16 idx);
 
   WebRtc_Word16 AllocatePacketBufferByIdxSafe(
-      const WebRtcNetEQDecoder* usedCodecs,
-      WebRtc_Word16 noOfCodecs,
+      const WebRtcNetEQDecoder* used_codecs,
+      WebRtc_Word16 num_codecs,
       const WebRtc_Word16 idx);
 
   // Delete the NetEQ corresponding to |index|.
@@ -314,32 +315,32 @@
 
   void RemoveSlavesSafe();
 
-  void* _inst[MAX_NUM_SLAVE_NETEQ + 1];
-  void* _instMem[MAX_NUM_SLAVE_NETEQ + 1];
+  void* inst_[MAX_NUM_SLAVE_NETEQ + 1];
+  void* inst_mem_[MAX_NUM_SLAVE_NETEQ + 1];
 
-  WebRtc_Word16* _netEqPacketBuffer[MAX_NUM_SLAVE_NETEQ + 1];
+  WebRtc_Word16* neteq_packet_buffer_[MAX_NUM_SLAVE_NETEQ + 1];
 
-  WebRtc_Word32 _id;
-  float _currentSampFreqKHz;
-  bool _avtPlayout;
-  AudioPlayoutMode _playoutMode;
-  CriticalSectionWrapper* _netEqCritSect;
+  WebRtc_Word32 id_;
+  float current_samp_freq_khz_;
+  bool avt_playout_;
+  AudioPlayoutMode playout_mode_;
+  CriticalSectionWrapper* neteq_crit_sect_;
 
-  WebRtcVadInst* _ptrVADInst[MAX_NUM_SLAVE_NETEQ + 1];
+  WebRtcVadInst* ptr_vadinst_[MAX_NUM_SLAVE_NETEQ + 1];
 
-  bool _vadStatus;
-  ACMVADMode _vadMode;
-  RWLockWrapper* _decodeLock;
-  bool _isInitialized[MAX_NUM_SLAVE_NETEQ + 1];
-  WebRtc_UWord8 _numSlaves;
-  bool _receivedStereo;
-  void* _masterSlaveInfo;
-  AudioFrame::VADActivity _previousAudioActivity;
-  WebRtc_Word32 _extraDelay;
+  bool vad_status_;
+  ACMVADMode vad_mode_;
+  RWLockWrapper* decode_lock_;
+  bool is_initialized_[MAX_NUM_SLAVE_NETEQ + 1];
+  WebRtc_UWord8 num_slaves_;
+  bool received_stereo_;
+  void* master_slave_info_;
+  AudioFrame::VADActivity previous_audio_activity_;
+  WebRtc_Word32 extra_delay_;
 
-  CriticalSectionWrapper* _callbackCritSect;
+  CriticalSectionWrapper* callback_crit_sect_;
 };
 
-}  //namespace webrtc
+}  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_NETEQ_H_
diff --git a/webrtc/modules/audio_coding/main/source/acm_neteq_unittest.cc b/webrtc/modules/audio_coding/main/source/acm_neteq_unittest.cc
index 8f73592..d7f3f83 100644
--- a/webrtc/modules/audio_coding/main/source/acm_neteq_unittest.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_neteq_unittest.cc
@@ -10,16 +10,17 @@
 
 // This file contains unit tests for ACM's NetEQ wrapper (class ACMNetEQ).
 
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+
 #include <stdlib.h>
 
 #include "gtest/gtest.h"
-#include "modules/audio_coding/codecs/pcm16b/include/pcm16b.h"
-#include "modules/audio_coding/main/interface/audio_coding_module_typedefs.h"
-#include "modules/audio_coding/main/source/acm_codec_database.h"
-#include "modules/audio_coding/main/source/acm_neteq.h"
-#include "modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
-#include "modules/interface/module_common_types.h"
-#include "typedefs.h"  // NOLINT(build/include)
+#include "webrtc/modules/audio_coding/codecs/pcm16b/include/pcm16b.h"
+#include "webrtc/modules/audio_coding/main/interface/audio_coding_module_typedefs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/modules/interface/module_common_types.h"
+#include "webrtc/typedefs.h"
 
 namespace webrtc {
 
diff --git a/webrtc/modules/audio_coding/main/source/acm_opus.cc b/webrtc/modules/audio_coding/main/source/acm_opus.cc
index 4e9e5a2..83c5694 100644
--- a/webrtc/modules/audio_coding/main/source/acm_opus.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_opus.cc
@@ -8,29 +8,29 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_opus.h"
+#include "webrtc/modules/audio_coding/main/source/acm_opus.h"
 
-#include "acm_codec_database.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 #ifdef WEBRTC_CODEC_OPUS
-#include "modules/audio_coding/codecs/opus/interface/opus_interface.h"
+#include "webrtc/modules/audio_coding/codecs/opus/interface/opus_interface.h"
 #endif
 
 namespace webrtc {
 
 #ifndef WEBRTC_CODEC_OPUS
 
-ACMOpus::ACMOpus(int16_t /* codecID */)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL),
-      _sampleFreq(0),
-      _bitrate(0),
-      _channels(1) {
+ACMOpus::ACMOpus(int16_t /* codec_id */)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL),
+      sample_freq_(0),
+      bitrate_(0),
+      channels_(1) {
   return;
 }
 
@@ -38,29 +38,29 @@
   return;
 }
 
-int16_t ACMOpus::InternalEncode(uint8_t* /* bitStream */,
-                                int16_t* /* bitStreamLenByte */) {
+int16_t ACMOpus::InternalEncode(uint8_t* /* bitstream */,
+                                int16_t* /* bitstream_len_byte */) {
   return -1;
 }
 
-int16_t ACMOpus::DecodeSafe(uint8_t* /* bitStream */,
-                            int16_t /* bitStreamLenByte */,
+int16_t ACMOpus::DecodeSafe(uint8_t* /* bitstream */,
+                            int16_t /* bitstream_len_byte */,
                             int16_t* /* audio */,
-                            int16_t* /* audioSamples */,
-                            int8_t* /* speechType */) {
+                            int16_t* /* audio_samples */,
+                            int8_t* /* speech_type */) {
   return -1;
 }
 
-int16_t ACMOpus::InternalInitEncoder(WebRtcACMCodecParams* /* codecParams */) {
+int16_t ACMOpus::InternalInitEncoder(WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-int16_t ACMOpus::InternalInitDecoder(WebRtcACMCodecParams* /* codecParams */) {
+int16_t ACMOpus::InternalInitDecoder(WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-int32_t ACMOpus::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef */,
-                          const CodecInst& /* codecInst */) {
+int32_t ACMOpus::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def */,
+                          const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -84,7 +84,7 @@
   return;
 }
 
-void ACMOpus::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMOpus::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
@@ -101,119 +101,120 @@
 
 #else  //===================== Actual Implementation =======================
 
-ACMOpus::ACMOpus(int16_t codecID)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL),
-      _sampleFreq(32000),  // Default sampling frequency.
-      _bitrate(20000),  // Default bit-rate.
-      _channels(1) {  // Default mono
-  _codecID = codecID;
+ACMOpus::ACMOpus(int16_t codec_id)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL),
+      sample_freq_(32000),  // Default sampling frequency.
+      bitrate_(20000),  // Default bit-rate.
+      channels_(1) {  // Default mono
+  codec_id_ = codec_id;
   // Opus has internal DTX, but we dont use it for now.
-  _hasInternalDTX = false;
+  has_internal_dtx_ = false;
 
-  if (_codecID != ACMCodecDB::kOpus) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  if (codec_id_ != ACMCodecDB::kOpus) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Wrong codec id for Opus.");
-    _sampleFreq = -1;
-    _bitrate = -1;
+    sample_freq_ = -1;
+    bitrate_ = -1;
   }
   return;
 }
 
 ACMOpus::~ACMOpus() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcOpus_EncoderFree(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcOpus_EncoderFree(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
-  if (_decoderInstPtr != NULL) {
-    WebRtcOpus_DecoderFree(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcOpus_DecoderFree(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
   return;
 }
 
-int16_t ACMOpus::InternalEncode(uint8_t* bitStream, int16_t* bitStreamLenByte) {
+int16_t ACMOpus::InternalEncode(uint8_t* bitstream,
+                                int16_t* bitstream_len_byte) {
   // Call Encoder.
-  *bitStreamLenByte = WebRtcOpus_Encode(_encoderInstPtr,
-                                        &_inAudio[_inAudioIxRead],
-                                        _frameLenSmpl,
-                                        MAX_PAYLOAD_SIZE_BYTE,
-                                        bitStream);
+  *bitstream_len_byte = WebRtcOpus_Encode(encoder_inst_ptr_,
+                                          &in_audio_[in_audio_ix_read_],
+                                          frame_len_smpl_,
+                                          MAX_PAYLOAD_SIZE_BYTE, bitstream);
   // Check for error reported from encoder.
-  if (*bitStreamLenByte < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  if (*bitstream_len_byte < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "InternalEncode: Encode error for Opus");
-    *bitStreamLenByte = 0;
+    *bitstream_len_byte = 0;
     return -1;
   }
 
   // Increment the read index. This tells the caller how far
   // we have gone forward in reading the audio buffer.
-  _inAudioIxRead += _frameLenSmpl * _channels;
+  in_audio_ix_read_ += frame_len_smpl_ * channels_;
 
-  return *bitStreamLenByte;
+  return *bitstream_len_byte;
 }
 
-int16_t ACMOpus::DecodeSafe(uint8_t* bitStream, int16_t bitStreamLenByte,
-                            int16_t* audio, int16_t* audioSamples,
-                            int8_t* speechType) {
+int16_t ACMOpus::DecodeSafe(uint8_t* bitstream, int16_t bitstream_len_byte,
+                            int16_t* audio, int16_t* audio_samples,
+                            int8_t* speech_type) {
   return 0;
 }
 
-int16_t ACMOpus::InternalInitEncoder(WebRtcACMCodecParams* codecParams) {
+int16_t ACMOpus::InternalInitEncoder(WebRtcACMCodecParams* codec_params) {
   int16_t ret;
-  if (_encoderInstPtr != NULL) {
-    WebRtcOpus_EncoderFree(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcOpus_EncoderFree(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
-  ret = WebRtcOpus_EncoderCreate(&_encoderInstPtr,
-                                 codecParams->codecInstant.channels);
+  ret = WebRtcOpus_EncoderCreate(&encoder_inst_ptr_,
+                                 codec_params->codec_inst.channels);
   // Store number of channels.
-  _channels = codecParams->codecInstant.channels;
+  channels_ = codec_params->codec_inst.channels;
 
   if (ret < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Encoder creation failed for Opus");
     return ret;
   }
-  ret = WebRtcOpus_SetBitRate(_encoderInstPtr, codecParams->codecInstant.rate);
+  ret = WebRtcOpus_SetBitRate(encoder_inst_ptr_,
+                              codec_params->codec_inst.rate);
   if (ret < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Setting initial bitrate failed for Opus");
     return ret;
   }
 
   // Store bitrate.
-  _bitrate = codecParams->codecInstant.rate;
+  bitrate_ = codec_params->codec_inst.rate;
 
   return 0;
 }
 
-int16_t ACMOpus::InternalInitDecoder(WebRtcACMCodecParams* codecParams) {
-  if(_decoderInstPtr == NULL) {
-    if (WebRtcOpus_DecoderCreate(&_decoderInstPtr,
-                                 codecParams->codecInstant.channels) < 0) {
+int16_t ACMOpus::InternalInitDecoder(WebRtcACMCodecParams* codec_params) {
+  if (decoder_inst_ptr_ == NULL) {
+    if (WebRtcOpus_DecoderCreate(&decoder_inst_ptr_,
+                                 codec_params->codec_inst.channels) < 0) {
       return -1;
     }
   }
 
-  // Number of channels in decoder should match the number in |codecParams|.
-  assert(codecParams->codecInstant.channels ==
-      WebRtcOpus_DecoderChannels(_decoderInstPtr));
+  // Number of channels in decoder should match the number in |codec_params|.
+  assert(codec_params->codec_inst.channels ==
+      WebRtcOpus_DecoderChannels(decoder_inst_ptr_));
 
-  if (WebRtcOpus_DecoderInit(_decoderInstPtr) < 0) {
+  if (WebRtcOpus_DecoderInit(decoder_inst_ptr_) < 0) {
     return -1;
   }
-  if (WebRtcOpus_DecoderInitSlave(_decoderInstPtr) < 0) {
+  if (WebRtcOpus_DecoderInitSlave(decoder_inst_ptr_) < 0) {
     return -1;
   }
   return 0;
 }
 
-int32_t ACMOpus::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                          const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+int32_t ACMOpus::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                          const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "CodeDef: Decoder uninitialized for Opus");
     return -1;
   }
@@ -223,21 +224,20 @@
   // TODO(tlegrand): Decoder is registered in NetEQ as a 32 kHz decoder, which
   // is true until we have a full 48 kHz system, and remove the downsampling
   // in the Opus decoder wrapper.
-  SET_CODEC_PAR(codecDef, kDecoderOpus, codecInst.pltype,
-                _decoderInstPtr, 32000);
+  SET_CODEC_PAR(codec_def, kDecoderOpus, codec_inst.pltype,
+                decoder_inst_ptr_, 32000);
 
   // If this is the master of NetEQ, regular decoder will be added, otherwise
   // the slave decoder will be used.
-  if (_isMaster) {
-    SET_OPUS_FUNCTIONS(codecDef);
+  if (is_master_) {
+    SET_OPUS_FUNCTIONS(codec_def);
   } else {
-    SET_OPUSSLAVE_FUNCTIONS(codecDef);
+    SET_OPUSSLAVE_FUNCTIONS(codec_def);
   }
 
   return 0;
 }
 
-
 ACMGenericCodec* ACMOpus::CreateInstance(void) {
   return NULL;
 }
@@ -248,9 +248,9 @@
 }
 
 void ACMOpus::DestructEncoderSafe() {
-  if (_encoderInstPtr) {
-    WebRtcOpus_EncoderFree(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_) {
+    WebRtcOpus_EncoderFree(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
 }
 
@@ -260,32 +260,32 @@
 }
 
 void ACMOpus::DestructDecoderSafe() {
-  _decoderInitialized = false;
-  if (_decoderInstPtr) {
-    WebRtcOpus_DecoderFree(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  decoder_initialized_ = false;
+  if (decoder_inst_ptr_) {
+    WebRtcOpus_DecoderFree(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
 }
 
-void ACMOpus::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    WebRtcOpus_EncoderFree((OpusEncInst*) ptrInst);
+void ACMOpus::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    WebRtcOpus_EncoderFree((OpusEncInst*) ptr_inst);
   }
   return;
 }
 
 int16_t ACMOpus::SetBitRateSafe(const int32_t rate) {
   if (rate < 6000 || rate > 510000) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "SetBitRateSafe: Invalid rate Opus");
     return -1;
   }
 
-  _bitrate = rate;
+  bitrate_ = rate;
 
   // Ask the encoder for the new rate.
-  if (WebRtcOpus_SetBitRate(_encoderInstPtr, _bitrate) >= 0) {
-    _encoderParams.codecInstant.rate = _bitrate;
+  if (WebRtcOpus_SetBitRate(encoder_inst_ptr_, bitrate_) >= 0) {
+    encoder_params_.codec_inst.rate = bitrate_;
     return 0;
   }
 
diff --git a/webrtc/modules/audio_coding/main/source/acm_opus.h b/webrtc/modules/audio_coding/main/source/acm_opus.h
index 34cd376..bd8ff32 100644
--- a/webrtc/modules/audio_coding/main/source/acm_opus.h
+++ b/webrtc/modules/audio_coding/main/source/acm_opus.h
@@ -11,8 +11,8 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_OPUS_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_OPUS_H_
 
-#include "acm_generic_codec.h"
-#include "resampler.h"
+#include "webrtc/common_audio/resampler/include/resampler.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 struct WebRtcOpusEncInst;
 struct WebRtcOpusDecInst;
@@ -21,22 +21,26 @@
 
 class ACMOpus : public ACMGenericCodec {
  public:
-  ACMOpus(int16_t codecID);
+  explicit ACMOpus(int16_t codec_id);
   ~ACMOpus();
 
   ACMGenericCodec* CreateInstance(void);
 
-  int16_t InternalEncode(uint8_t* bitstream, int16_t* bitStreamLenByte);
+  int16_t InternalEncode(uint8_t* bitstream, int16_t* bitstream_len_byte);
 
-  int16_t InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  int16_t InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  int16_t InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  int16_t InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  int16_t DecodeSafe(uint8_t* bitStream, int16_t bitStreamLenByte,
-                     int16_t* audio, int16_t* audioSamples, int8_t* speechType);
+  int16_t DecodeSafe(uint8_t* bitstream,
+                     int16_t bitstream_len_byte,
+                     int16_t* audio,
+                     int16_t* audio_samples,
+                     int8_t* speech_type);
 
-  int32_t CodecDef(WebRtcNetEQ_CodecDef& codecDef, const CodecInst& codecInst);
+  int32_t CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                   const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -46,7 +50,7 @@
 
   int16_t InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   int16_t SetBitRateSafe(const int32_t rate);
 
@@ -54,11 +58,11 @@
 
   void SplitStereoPacket(uint8_t* payload, int32_t* payload_length);
 
-  WebRtcOpusEncInst* _encoderInstPtr;
-  WebRtcOpusDecInst* _decoderInstPtr;
-  uint16_t _sampleFreq;
-  uint16_t _bitrate;
-  int _channels;
+  WebRtcOpusEncInst* encoder_inst_ptr_;
+  WebRtcOpusDecInst* decoder_inst_ptr_;
+  uint16_t sample_freq_;
+  uint16_t bitrate_;
+  int channels_;
 };
 
 }  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_pcm16b.cc b/webrtc/modules/audio_coding/main/source/acm_pcm16b.cc
index 4e88743..f341295 100644
--- a/webrtc/modules/audio_coding/main/source/acm_pcm16b.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_pcm16b.cc
@@ -8,24 +8,24 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_pcm16b.h"
+#include "webrtc/modules/audio_coding/main/source/acm_pcm16b.h"
 
-#include "acm_codec_database.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 #ifdef WEBRTC_CODEC_PCM16
-#include "pcm16b.h"
+#include "webrtc/modules/audio_coding/codecs/pcm16b/include/pcm16b.h"
 #endif
 
 namespace webrtc {
 
 #ifndef WEBRTC_CODEC_PCM16
 
-ACMPCM16B::ACMPCM16B(WebRtc_Word16 /* codecID */) {
+ACMPCM16B::ACMPCM16B(WebRtc_Word16 /* codec_id */) {
   return;
 }
 
@@ -33,31 +33,32 @@
   return;
 }
 
-WebRtc_Word16 ACMPCM16B::InternalEncode(WebRtc_UWord8* /* bitStream */,
-                                        WebRtc_Word16* /* bitStreamLenByte */) {
+WebRtc_Word16 ACMPCM16B::InternalEncode(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
-WebRtc_Word16 ACMPCM16B::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                    WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMPCM16B::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                    WebRtc_Word16 /* bitstream_len_byte */,
                                     WebRtc_Word16* /* audio */,
-                                    WebRtc_Word16* /* audioSamples */,
-                                    WebRtc_Word8* /* speechType */) {
+                                    WebRtc_Word16* /* audio_samples */,
+                                    WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
 WebRtc_Word16 ACMPCM16B::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMPCM16B::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-WebRtc_Word32 ACMPCM16B::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef */,
-                                  const CodecInst& /* codecInst */) {
+WebRtc_Word32 ACMPCM16B::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def */,
+                                  const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -73,7 +74,7 @@
   return -1;
 }
 
-void ACMPCM16B::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMPCM16B::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
@@ -90,67 +91,67 @@
 }
 
 #else     //===================== Actual Implementation =======================
-ACMPCM16B::ACMPCM16B(WebRtc_Word16 codecID) {
-  _codecID = codecID;
-  _samplingFreqHz = ACMCodecDB::CodecFreq(_codecID);
+ACMPCM16B::ACMPCM16B(WebRtc_Word16 codec_id) {
+  codec_id_ = codec_id;
+  sampling_freq_hz_ = ACMCodecDB::CodecFreq(codec_id_);
 }
 
 ACMPCM16B::~ACMPCM16B() {
   return;
 }
 
-WebRtc_Word16 ACMPCM16B::InternalEncode(WebRtc_UWord8* bitStream,
-                                        WebRtc_Word16* bitStreamLenByte) {
-  *bitStreamLenByte = WebRtcPcm16b_Encode(&_inAudio[_inAudioIxRead],
-      _frameLenSmpl * _noChannels,
-      bitStream);
+WebRtc_Word16 ACMPCM16B::InternalEncode(WebRtc_UWord8* bitstream,
+                                        WebRtc_Word16* bitstream_len_byte) {
+  *bitstream_len_byte = WebRtcPcm16b_Encode(&in_audio_[in_audio_ix_read_],
+                                            frame_len_smpl_ * num_channels_,
+                                            bitstream);
   // Increment the read index to tell the caller that how far
   // we have gone forward in reading the audio buffer.
-  _inAudioIxRead += _frameLenSmpl * _noChannels;
-  return *bitStreamLenByte;
+  in_audio_ix_read_ += frame_len_smpl_ * num_channels_;
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMPCM16B::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                    WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMPCM16B::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                    WebRtc_Word16 /* bitstream_len_byte */,
                                     WebRtc_Word16* /* audio */,
-                                    WebRtc_Word16* /* audioSamples */,
-                                    WebRtc_Word8* /* speechType */) {
+                                    WebRtc_Word16* /* audio_samples */,
+                                    WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
 WebRtc_Word16 ACMPCM16B::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   // This codec does not need initialization, PCM has no instance.
   return 0;
 }
 
 WebRtc_Word16 ACMPCM16B::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   // This codec does not need initialization, PCM has no instance.
   return 0;
 }
 
-WebRtc_Word32 ACMPCM16B::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                  const CodecInst& codecInst) {
+WebRtc_Word32 ACMPCM16B::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                  const CodecInst& codec_inst) {
   // Fill up the structure by calling "SET_CODEC_PAR" & "SET_PCMU_FUNCTION".
   // Then call NetEQ to add the codec to it's database.
-  if (codecInst.channels == 1) {
-    switch(_samplingFreqHz) {
+  if (codec_inst.channels == 1) {
+    switch (sampling_freq_hz_) {
       case 8000: {
-        SET_CODEC_PAR(codecDef, kDecoderPCM16B, codecInst.pltype, NULL, 8000);
-        SET_PCM16B_FUNCTIONS(codecDef);
+        SET_CODEC_PAR(codec_def, kDecoderPCM16B, codec_inst.pltype, NULL, 8000);
+        SET_PCM16B_FUNCTIONS(codec_def);
         break;
       }
       case 16000: {
-        SET_CODEC_PAR(codecDef, kDecoderPCM16Bwb, codecInst.pltype, NULL,
-            16000);
-        SET_PCM16B_WB_FUNCTIONS(codecDef);
+        SET_CODEC_PAR(codec_def, kDecoderPCM16Bwb, codec_inst.pltype, NULL,
+                      16000);
+        SET_PCM16B_WB_FUNCTIONS(codec_def);
         break;
       }
       case 32000: {
-        SET_CODEC_PAR(codecDef, kDecoderPCM16Bswb32kHz, codecInst.pltype,
-            NULL, 32000);
-        SET_PCM16B_SWB32_FUNCTIONS(codecDef);
+        SET_CODEC_PAR(codec_def, kDecoderPCM16Bswb32kHz, codec_inst.pltype,
+                      NULL, 32000);
+        SET_PCM16B_SWB32_FUNCTIONS(codec_def);
         break;
       }
       default: {
@@ -158,23 +159,23 @@
       }
     }
   } else {
-    switch(_samplingFreqHz) {
+    switch (sampling_freq_hz_) {
       case 8000: {
-        SET_CODEC_PAR(codecDef, kDecoderPCM16B_2ch, codecInst.pltype, NULL,
-            8000);
-        SET_PCM16B_FUNCTIONS(codecDef);
+        SET_CODEC_PAR(codec_def, kDecoderPCM16B_2ch, codec_inst.pltype, NULL,
+                      8000);
+        SET_PCM16B_FUNCTIONS(codec_def);
         break;
       }
       case 16000: {
-        SET_CODEC_PAR(codecDef, kDecoderPCM16Bwb_2ch, codecInst.pltype,
-            NULL, 16000);
-        SET_PCM16B_WB_FUNCTIONS(codecDef);
+        SET_CODEC_PAR(codec_def, kDecoderPCM16Bwb_2ch, codec_inst.pltype,
+                      NULL, 16000);
+        SET_PCM16B_WB_FUNCTIONS(codec_def);
         break;
       }
       case 32000: {
-        SET_CODEC_PAR(codecDef, kDecoderPCM16Bswb32kHz_2ch, codecInst.pltype,
-            NULL, 32000);
-        SET_PCM16B_SWB32_FUNCTIONS(codecDef);
+        SET_CODEC_PAR(codec_def, kDecoderPCM16Bswb32kHz_2ch, codec_inst.pltype,
+                      NULL, 32000);
+        SET_PCM16B_SWB32_FUNCTIONS(codec_def);
         break;
       }
       default: {
@@ -199,22 +200,22 @@
   return 0;
 }
 
-void ACMPCM16B::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMPCM16B::InternalDestructEncoderInst(void* /* ptr_inst */) {
   // PCM has no instance.
   return;
 }
 
 void ACMPCM16B::DestructEncoderSafe() {
   // PCM has no instance.
-  _encoderExist = false;
-  _encoderInitialized = false;
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
   return;
 }
 
 void ACMPCM16B::DestructDecoderSafe() {
   // PCM has no instance.
-  _decoderExist = false;
-  _decoderInitialized = false;
+  decoder_exist_ = false;
+  decoder_initialized_ = false;
   return;
 }
 
diff --git a/webrtc/modules/audio_coding/main/source/acm_pcm16b.h b/webrtc/modules/audio_coding/main/source/acm_pcm16b.h
index cd81070..314e3bb 100644
--- a/webrtc/modules/audio_coding/main/source/acm_pcm16b.h
+++ b/webrtc/modules/audio_coding/main/source/acm_pcm16b.h
@@ -11,33 +11,34 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_PCM16B_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_PCM16B_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 namespace webrtc {
 
 class ACMPCM16B : public ACMGenericCodec {
  public:
-  ACMPCM16B(WebRtc_Word16 codecID);
+  explicit ACMPCM16B(WebRtc_Word16 codec_id);
   ~ACMPCM16B();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
                            WebRtc_Word16* audio,
-                           WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+                           WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -47,11 +48,11 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   void SplitStereoPacket(uint8_t* payload, int32_t* payload_length);
 
-  WebRtc_Word32 _samplingFreqHz;
+  WebRtc_Word32 sampling_freq_hz_;
 };
 
 }  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_pcma.cc b/webrtc/modules/audio_coding/main/source/acm_pcma.cc
index 867f543..24a6fe2 100644
--- a/webrtc/modules/audio_coding/main/source/acm_pcma.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_pcma.cc
@@ -8,71 +8,71 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_pcma.h"
+#include "webrtc/modules/audio_coding/main/source/acm_pcma.h"
 
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/codecs/g711/include/g711_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 // Codec interface
-#include "g711_interface.h"
 
 namespace webrtc {
 
-ACMPCMA::ACMPCMA(WebRtc_Word16 codecID) {
-  _codecID = codecID;
+ACMPCMA::ACMPCMA(WebRtc_Word16 codec_id) {
+  codec_id_ = codec_id;
 }
 
 ACMPCMA::~ACMPCMA() {
   return;
 }
 
-WebRtc_Word16 ACMPCMA::InternalEncode(WebRtc_UWord8* bitStream,
-                                      WebRtc_Word16* bitStreamLenByte) {
-  *bitStreamLenByte = WebRtcG711_EncodeA(NULL, &_inAudio[_inAudioIxRead],
-                                         _frameLenSmpl * _noChannels,
-                                         (WebRtc_Word16*) bitStream);
+WebRtc_Word16 ACMPCMA::InternalEncode(WebRtc_UWord8* bitstream,
+                                      WebRtc_Word16* bitstream_len_byte) {
+  *bitstream_len_byte = WebRtcG711_EncodeA(NULL, &in_audio_[in_audio_ix_read_],
+                                           frame_len_smpl_ * num_channels_,
+                                           (WebRtc_Word16*) bitstream);
   // Increment the read index this tell the caller that how far
   // we have gone forward in reading the audio buffer.
-  _inAudioIxRead += _frameLenSmpl * _noChannels;
-  return *bitStreamLenByte;
+  in_audio_ix_read_ += frame_len_smpl_ * num_channels_;
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMPCMA::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                  WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMPCMA::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                  WebRtc_Word16 /* bitstream_len_byte */,
                                   WebRtc_Word16* /* audio */,
-                                  WebRtc_Word16* /* audioSamples */,
-                                  WebRtc_Word8* /* speechType */) {
+                                  WebRtc_Word16* /* audio_samples */,
+                                  WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
 WebRtc_Word16 ACMPCMA::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   // This codec does not need initialization, PCM has no instance.
   return 0;
 }
 
 WebRtc_Word16 ACMPCMA::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   // This codec does not need initialization, PCM has no instance.
   return 0;
 }
 
-WebRtc_Word32 ACMPCMA::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                const CodecInst& codecInst) {
+WebRtc_Word32 ACMPCMA::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                const CodecInst& codec_inst) {
   // Fill up the structure by calling
   // "SET_CODEC_PAR" & "SET_PCMA_FUNCTION."
   // Then call NetEQ to add the codec to it's database.
-  if (codecInst.channels == 1) {
+  if (codec_inst.channels == 1) {
     // Mono mode.
-    SET_CODEC_PAR(codecDef, kDecoderPCMa, codecInst.pltype, NULL, 8000);
+    SET_CODEC_PAR(codec_def, kDecoderPCMa, codec_inst.pltype, NULL, 8000);
   } else {
     // Stereo mode.
-    SET_CODEC_PAR(codecDef, kDecoderPCMa_2ch, codecInst.pltype, NULL, 8000);
+    SET_CODEC_PAR(codec_def, kDecoderPCMa_2ch, codec_inst.pltype, NULL, 8000);
   }
-  SET_PCMA_FUNCTIONS(codecDef);
+  SET_PCMA_FUNCTIONS(codec_def);
   return 0;
 }
 
@@ -90,7 +90,7 @@
   return 0;
 }
 
-void ACMPCMA::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMPCMA::InternalDestructEncoderInst(void* /* ptr_inst */) {
   // PCM has no instance.
   return;
 }
@@ -102,8 +102,8 @@
 
 void ACMPCMA::DestructDecoderSafe() {
   // PCM has no instance.
-  _decoderInitialized = false;
-  _decoderExist = false;
+  decoder_initialized_ = false;
+  decoder_exist_ = false;
   return;
 }
 
diff --git a/webrtc/modules/audio_coding/main/source/acm_pcma.h b/webrtc/modules/audio_coding/main/source/acm_pcma.h
index 56dac16..cf12dca 100644
--- a/webrtc/modules/audio_coding/main/source/acm_pcma.h
+++ b/webrtc/modules/audio_coding/main/source/acm_pcma.h
@@ -11,33 +11,34 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_PCMA_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_PCMA_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 namespace webrtc {
 
 class ACMPCMA : public ACMGenericCodec {
  public:
-  ACMPCMA(WebRtc_Word16 codecID);
+  explicit ACMPCMA(WebRtc_Word16 codec_id);
   ~ACMPCMA();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
                            WebRtc_Word16* audio,
-                           WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+                           WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -47,7 +48,7 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   void SplitStereoPacket(uint8_t* payload, int32_t* payload_length);
 };
diff --git a/webrtc/modules/audio_coding/main/source/acm_pcmu.cc b/webrtc/modules/audio_coding/main/source/acm_pcmu.cc
index 92f7f5c..919826d 100644
--- a/webrtc/modules/audio_coding/main/source/acm_pcmu.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_pcmu.cc
@@ -8,71 +8,71 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_pcmu.h"
+#include "webrtc/modules/audio_coding/main/source/acm_pcmu.h"
 
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/codecs/g711/include/g711_interface.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 // Codec interface
-#include "g711_interface.h"
 
 namespace webrtc {
 
-ACMPCMU::ACMPCMU(WebRtc_Word16 codecID) {
-  _codecID = codecID;
+ACMPCMU::ACMPCMU(WebRtc_Word16 codec_id) {
+  codec_id_ = codec_id;
 }
 
 ACMPCMU::~ACMPCMU() {
   return;
 }
 
-WebRtc_Word16 ACMPCMU::InternalEncode(WebRtc_UWord8* bitStream,
-                                      WebRtc_Word16* bitStreamLenByte) {
-  *bitStreamLenByte = WebRtcG711_EncodeU(NULL, &_inAudio[_inAudioIxRead],
-                                         _frameLenSmpl * _noChannels,
-                                         (WebRtc_Word16*) bitStream);
+WebRtc_Word16 ACMPCMU::InternalEncode(WebRtc_UWord8* bitstream,
+                                      WebRtc_Word16* bitstream_len_byte) {
+  *bitstream_len_byte = WebRtcG711_EncodeU(NULL, &in_audio_[in_audio_ix_read_],
+                                           frame_len_smpl_ * num_channels_,
+                                           (WebRtc_Word16*)bitstream);
   // Increment the read index this tell the caller that how far
   // we have gone forward in reading the audio buffer.
-  _inAudioIxRead += _frameLenSmpl * _noChannels;
-  return *bitStreamLenByte;
+  in_audio_ix_read_ += frame_len_smpl_ * num_channels_;
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMPCMU::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                  WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMPCMU::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                  WebRtc_Word16 /* bitstream_len_byte */,
                                   WebRtc_Word16* /* audio */,
-                                  WebRtc_Word16* /* audioSamples */,
-                                  WebRtc_Word8* /* speechType */) {
+                                  WebRtc_Word16* /* audio_samples */,
+                                  WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
 WebRtc_Word16 ACMPCMU::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   // This codec does not need initialization, PCM has no instance.
   return 0;
 }
 
 WebRtc_Word16 ACMPCMU::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   // This codec does not need initialization, PCM has no instance.
   return 0;
 }
 
-WebRtc_Word32 ACMPCMU::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                const CodecInst& codecInst) {
+WebRtc_Word32 ACMPCMU::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                const CodecInst& codec_inst) {
   // Fill up the structure by calling
   // "SET_CODEC_PAR" & "SET_PCMU_FUNCTION."
   // Then call NetEQ to add the codec to it's database.
-  if (codecInst.channels == 1) {
+  if (codec_inst.channels == 1) {
     // Mono mode.
-    SET_CODEC_PAR(codecDef, kDecoderPCMu, codecInst.pltype, NULL, 8000);
+    SET_CODEC_PAR(codec_def, kDecoderPCMu, codec_inst.pltype, NULL, 8000);
   } else {
     // Stereo mode.
-    SET_CODEC_PAR(codecDef, kDecoderPCMu_2ch, codecInst.pltype, NULL, 8000);
+    SET_CODEC_PAR(codec_def, kDecoderPCMu_2ch, codec_inst.pltype, NULL, 8000);
   }
-  SET_PCMU_FUNCTIONS(codecDef);
+  SET_PCMU_FUNCTIONS(codec_def);
   return 0;
 }
 
@@ -90,22 +90,22 @@
   return 0;
 }
 
-void ACMPCMU::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMPCMU::InternalDestructEncoderInst(void* /* ptr_inst */) {
   // PCM has no instance.
   return;
 }
 
 void ACMPCMU::DestructEncoderSafe() {
   // PCM has no instance.
-  _encoderExist = false;
-  _encoderInitialized = false;
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
   return;
 }
 
 void ACMPCMU::DestructDecoderSafe() {
   // PCM has no instance.
-  _decoderInitialized = false;
-  _decoderExist = false;
+  decoder_initialized_ = false;
+  decoder_exist_ = false;
   return;
 }
 
diff --git a/webrtc/modules/audio_coding/main/source/acm_pcmu.h b/webrtc/modules/audio_coding/main/source/acm_pcmu.h
index c8b999a..f75e7aa 100644
--- a/webrtc/modules/audio_coding/main/source/acm_pcmu.h
+++ b/webrtc/modules/audio_coding/main/source/acm_pcmu.h
@@ -11,33 +11,34 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_PCMU_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_PCMU_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 namespace webrtc {
 
 class ACMPCMU : public ACMGenericCodec {
  public:
-  ACMPCMU(WebRtc_Word16 codecID);
+  explicit ACMPCMU(WebRtc_Word16 codec_id);
   ~ACMPCMU();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
                            WebRtc_Word16* audio,
-                           WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+                           WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -47,7 +48,7 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   void SplitStereoPacket(uint8_t* payload, int32_t* payload_length);
 };
diff --git a/webrtc/modules/audio_coding/main/source/acm_red.cc b/webrtc/modules/audio_coding/main/source/acm_red.cc
index cad985e..a249449 100644
--- a/webrtc/modules/audio_coding/main/source/acm_red.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_red.cc
@@ -8,55 +8,56 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_red.h"
-#include "acm_neteq.h"
-#include "acm_common_defs.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_red.h"
+
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 namespace webrtc {
 
-ACMRED::ACMRED(WebRtc_Word16 codecID) {
-  _codecID = codecID;
+ACMRED::ACMRED(WebRtc_Word16 codec_id) {
+  codec_id_ = codec_id;
 }
 
 ACMRED::~ACMRED() {
   return;
 }
 
-WebRtc_Word16 ACMRED::InternalEncode(WebRtc_UWord8* /* bitStream */,
-                                     WebRtc_Word16* /* bitStreamLenByte */) {
+WebRtc_Word16 ACMRED::InternalEncode(WebRtc_UWord8* /* bitstream */,
+                                     WebRtc_Word16* /* bitstream_len_byte */) {
   // RED is never used as an encoder
   // RED has no instance
   return 0;
 }
 
-WebRtc_Word16 ACMRED::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                 WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMRED::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                 WebRtc_Word16 /* bitstream_len_byte */,
                                  WebRtc_Word16* /* audio */,
-                                 WebRtc_Word16* /* audioSamples */,
-                                 WebRtc_Word8* /* speechType */) {
+                                 WebRtc_Word16* /* audio_samples */,
+                                 WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
 WebRtc_Word16 ACMRED::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   // This codec does not need initialization,
   // RED has no instance
   return 0;
 }
 
 WebRtc_Word16 ACMRED::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   // This codec does not need initialization,
   // RED has no instance
   return 0;
 }
 
-WebRtc_Word32 ACMRED::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                               const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
+WebRtc_Word32 ACMRED::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                               const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
     // Todo:
     // log error
     return -1;
@@ -66,8 +67,8 @@
   // "SET_CODEC_PAR" & "SET_PCMU_FUNCTION."
   // Then call NetEQ to add the codec to it's
   // database.
-  SET_CODEC_PAR((codecDef), kDecoderRED, codecInst.pltype, NULL, 8000);
-  SET_RED_FUNCTIONS((codecDef));
+  SET_CODEC_PAR((codec_def), kDecoderRED, codec_inst.pltype, NULL, 8000);
+  SET_RED_FUNCTIONS((codec_def));
   return 0;
 }
 
@@ -85,7 +86,7 @@
   return 0;
 }
 
-void ACMRED::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMRED::InternalDestructEncoderInst(void* /* ptr_inst */) {
   // RED has no instance
   return;
 }
diff --git a/webrtc/modules/audio_coding/main/source/acm_red.h b/webrtc/modules/audio_coding/main/source/acm_red.h
index 1e07823..5f4cb9b 100644
--- a/webrtc/modules/audio_coding/main/source/acm_red.h
+++ b/webrtc/modules/audio_coding/main/source/acm_red.h
@@ -11,33 +11,34 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_RED_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_RED_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 namespace webrtc {
 
 class ACMRED : public ACMGenericCodec {
  public:
-  ACMRED(WebRtc_Word16 codecID);
+  explicit ACMRED(WebRtc_Word16 codec_id);
   ~ACMRED();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
                            WebRtc_Word16* audio,
-                           WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+                           WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -47,7 +48,7 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 };
 
 }  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_resampler.cc b/webrtc/modules/audio_coding/main/source/acm_resampler.cc
index f8965ce..a776052 100644
--- a/webrtc/modules/audio_coding/main/source/acm_resampler.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_resampler.cc
@@ -8,65 +8,66 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+#include "webrtc/modules/audio_coding/main/source/acm_resampler.h"
+
 #include <string.h>
 
-#include "acm_resampler.h"
-
-#include "critical_section_wrapper.h"
-#include "resampler.h"
-#include "signal_processing_library.h"
-#include "trace.h"
+#include "webrtc/common_audio/resampler/include/resampler.h"
+#include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
+#include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 namespace webrtc {
 
 ACMResampler::ACMResampler()
-    : _resamplerCritSect(CriticalSectionWrapper::CreateCriticalSection()) {
+    : resampler_crit_sect_(CriticalSectionWrapper::CreateCriticalSection()) {
 }
 
 ACMResampler::~ACMResampler() {
-  delete _resamplerCritSect;
+  delete resampler_crit_sect_;
 }
 
-WebRtc_Word16 ACMResampler::Resample10Msec(const WebRtc_Word16* inAudio,
-                                           WebRtc_Word32 inFreqHz,
-                                           WebRtc_Word16* outAudio,
-                                           WebRtc_Word32 outFreqHz,
-                                           WebRtc_UWord8 numAudioChannels) {
-  CriticalSectionScoped cs(_resamplerCritSect);
+WebRtc_Word16 ACMResampler::Resample10Msec(const WebRtc_Word16* in_audio,
+                                           WebRtc_Word32 in_freq_hz,
+                                           WebRtc_Word16* out_audio,
+                                           WebRtc_Word32 out_freq_hz,
+                                           WebRtc_UWord8 num_audio_channels) {
+  CriticalSectionScoped cs(resampler_crit_sect_);
 
-  if (inFreqHz == outFreqHz) {
-    size_t length = static_cast<size_t>(inFreqHz * numAudioChannels / 100);
-    memcpy(outAudio, inAudio, length * sizeof(WebRtc_Word16));
-    return static_cast<WebRtc_Word16>(inFreqHz / 100);
+  if (in_freq_hz == out_freq_hz) {
+    size_t length = static_cast<size_t>(in_freq_hz * num_audio_channels / 100);
+    memcpy(out_audio, in_audio, length * sizeof(WebRtc_Word16));
+    return static_cast<WebRtc_Word16>(in_freq_hz / 100);
   }
 
   // |maxLen| is maximum number of samples for 10ms at 48kHz.
-  int maxLen = 480 * numAudioChannels;
-  int lengthIn = (WebRtc_Word16)(inFreqHz / 100) * numAudioChannels;
-  int outLen;
+  int max_len = 480 * num_audio_channels;
+  int length_in = (WebRtc_Word16)(in_freq_hz / 100) * num_audio_channels;
+  int out_len;
 
   WebRtc_Word32 ret;
   ResamplerType type;
-  type = (numAudioChannels == 1) ? kResamplerSynchronous :
+  type = (num_audio_channels == 1) ? kResamplerSynchronous :
       kResamplerSynchronousStereo;
 
-  ret = _resampler.ResetIfNeeded(inFreqHz, outFreqHz, type);
+  ret = resampler_.ResetIfNeeded(in_freq_hz, out_freq_hz, type);
   if (ret < 0) {
     WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, 0,
                  "Error in reset of resampler");
     return -1;
   }
 
-  ret = _resampler.Push(inAudio, lengthIn, outAudio, maxLen, outLen);
+  ret = resampler_.Push(in_audio, length_in, out_audio, max_len, out_len);
   if (ret < 0) {
     WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, 0,
                  "Error in resampler: resampler.Push");
     return -1;
   }
 
-  WebRtc_Word16 outAudioLenSmpl = (WebRtc_Word16) outLen / numAudioChannels;
+  WebRtc_Word16 out_audio_len_smpl = (WebRtc_Word16) out_len /
+      num_audio_channels;
 
-  return outAudioLenSmpl;
+  return out_audio_len_smpl;
 }
 
 }  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_resampler.h b/webrtc/modules/audio_coding/main/source/acm_resampler.h
index 1586f02..aacd222 100644
--- a/webrtc/modules/audio_coding/main/source/acm_resampler.h
+++ b/webrtc/modules/audio_coding/main/source/acm_resampler.h
@@ -11,8 +11,8 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_RESAMPLER_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_RESAMPLER_H_
 
-#include "resampler.h"
-#include "typedefs.h"
+#include "webrtc/common_audio/resampler/include/resampler.h"
+#include "webrtc/typedefs.h"
 
 namespace webrtc {
 
@@ -23,16 +23,16 @@
   ACMResampler();
   ~ACMResampler();
 
-  WebRtc_Word16 Resample10Msec(const WebRtc_Word16* inAudio,
-                               const WebRtc_Word32 inFreqHz,
-                               WebRtc_Word16* outAudio,
-                               const WebRtc_Word32 outFreqHz,
-                               WebRtc_UWord8 numAudioChannels);
+  WebRtc_Word16 Resample10Msec(const WebRtc_Word16* in_audio,
+                               const WebRtc_Word32 in_freq_hz,
+                               WebRtc_Word16* out_audio,
+                               const WebRtc_Word32 out_freq_hz,
+                               WebRtc_UWord8 num_audio_channels);
 
  private:
   // Use the Resampler class.
-  Resampler _resampler;
-  CriticalSectionWrapper* _resamplerCritSect;
+  Resampler resampler_;
+  CriticalSectionWrapper* resampler_crit_sect_;
 };
 
 }  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/acm_speex.cc b/webrtc/modules/audio_coding/main/source/acm_speex.cc
index ae5f366..73ab7fc 100644
--- a/webrtc/modules/audio_coding/main/source/acm_speex.cc
+++ b/webrtc/modules/audio_coding/main/source/acm_speex.cc
@@ -8,13 +8,14 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_speex.h"
-#include "acm_codec_database.h"
-#include "acm_common_defs.h"
-#include "acm_neteq.h"
-#include "trace.h"
-#include "webrtc_neteq.h"
-#include "webrtc_neteq_help_macros.h"
+#include "webrtc/modules/audio_coding/main/source/acm_speex.h"
+
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq.h"
+#include "webrtc/modules/audio_coding/neteq/interface/webrtc_neteq_help_macros.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 #ifdef WEBRTC_CODEC_SPEEX
 // NOTE! Speex is not included in the open-source package. Modify this file or
@@ -25,14 +26,14 @@
 namespace webrtc {
 
 #ifndef WEBRTC_CODEC_SPEEX
-ACMSPEEX::ACMSPEEX(WebRtc_Word16 /* codecID */)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL),
-      _complMode(0),
-      _vbrEnabled(false),
-      _encodingRate(-1),
-      _samplingFrequency(-1),
-      _samplesIn20MsAudio(-1) {
+ACMSPEEX::ACMSPEEX(WebRtc_Word16 /* codec_id */)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL),
+      compl_mode_(0),
+      vbr_enabled_(false),
+      encoding_rate_(-1),
+      sampling_frequency_(-1),
+      samples_in_20ms_audio_(-1) {
   return;
 }
 
@@ -40,16 +41,17 @@
   return;
 }
 
-WebRtc_Word16 ACMSPEEX::InternalEncode(WebRtc_UWord8* /* bitStream */,
-                                       WebRtc_Word16* /* bitStreamLenByte */) {
+WebRtc_Word16 ACMSPEEX::InternalEncode(
+    WebRtc_UWord8* /* bitstream */,
+    WebRtc_Word16* /* bitstream_len_byte */) {
   return -1;
 }
 
-WebRtc_Word16 ACMSPEEX::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                   WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMSPEEX::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                   WebRtc_Word16 /* bitstream_len_byte */,
                                    WebRtc_Word16* /* audio */,
-                                   WebRtc_Word16* /* audioSamples */,
-                                   WebRtc_Word8* /* speechType */) {
+                                   WebRtc_Word16* /* audio_samples */,
+                                   WebRtc_Word8* /* speech_type */) {
   return -1;
 }
 
@@ -62,17 +64,17 @@
 }
 
 WebRtc_Word16 ACMSPEEX::InternalInitEncoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
 WebRtc_Word16 ACMSPEEX::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   return -1;
 }
 
-WebRtc_Word32 ACMSPEEX::CodecDef(WebRtcNetEQ_CodecDef& /* codecDef */,
-                                 const CodecInst& /* codecInst */) {
+WebRtc_Word32 ACMSPEEX::CodecDef(WebRtcNetEQ_CodecDef& /* codec_def */,
+                                 const CodecInst& /* codec_inst */) {
   return -1;
 }
 
@@ -100,7 +102,7 @@
   return -1;
 }
 
-void ACMSPEEX::InternalDestructEncoderInst(void* /* ptrInst */) {
+void ACMSPEEX::InternalDestructEncoderInst(void* /* ptr_inst */) {
   return;
 }
 
@@ -120,111 +122,110 @@
 
 #else  //===================== Actual Implementation =======================
 
-ACMSPEEX::ACMSPEEX(WebRtc_Word16 codecID)
-    : _encoderInstPtr(NULL),
-      _decoderInstPtr(NULL) {
-  _codecID = codecID;
+ACMSPEEX::ACMSPEEX(WebRtc_Word16 codec_id)
+    : encoder_inst_ptr_(NULL),
+      decoder_inst_ptr_(NULL) {
+  codec_id_ = codec_id;
 
   // Set sampling frequency, frame size and rate Speex
-  if (_codecID == ACMCodecDB::kSPEEX8) {
-    _samplingFrequency = 8000;
-    _samplesIn20MsAudio = 160;
-    _encodingRate = 11000;
-  } else if (_codecID == ACMCodecDB::kSPEEX16) {
-    _samplingFrequency = 16000;
-    _samplesIn20MsAudio = 320;
-    _encodingRate = 22000;
+  if (codec_id_ == ACMCodecDB::kSPEEX8) {
+    sampling_frequency_ = 8000;
+    samples_in_20ms_audio_ = 160;
+    encoding_rate_ = 11000;
+  } else if (codec_id_ == ACMCodecDB::kSPEEX16) {
+    sampling_frequency_ = 16000;
+    samples_in_20ms_audio_ = 320;
+    encoding_rate_ = 22000;
   } else {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Wrong codec id for Speex.");
 
-    _samplingFrequency = -1;
-    _samplesIn20MsAudio = -1;
-    _encodingRate = -1;
+    sampling_frequency_ = -1;
+    samples_in_20ms_audio_ = -1;
+    encoding_rate_ = -1;
   }
 
-  _hasInternalDTX = true;
-  _dtxEnabled = false;
-  _vbrEnabled = false;
-  _complMode = 3;  // default complexity value
+  has_internal_dtx_ = true;
+  dtx_enabled_ = false;
+  vbr_enabled_ = false;
+  compl_mode_ = 3;  // default complexity value
 
   return;
 }
 
 ACMSPEEX::~ACMSPEEX() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcSpeex_FreeEnc(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcSpeex_FreeEnc(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
-  if (_decoderInstPtr != NULL) {
-    WebRtcSpeex_FreeDec(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcSpeex_FreeDec(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
   return;
 }
 
-WebRtc_Word16 ACMSPEEX::InternalEncode(WebRtc_UWord8* bitStream,
-                                       WebRtc_Word16* bitStreamLenByte) {
+WebRtc_Word16 ACMSPEEX::InternalEncode(WebRtc_UWord8* bitstream,
+                                       WebRtc_Word16* bitstream_len_byte) {
   WebRtc_Word16 status;
-  WebRtc_Word16 numEncodedSamples = 0;
+  WebRtc_Word16 num_encoded_samples = 0;
   WebRtc_Word16 n = 0;
 
-  while (numEncodedSamples < _frameLenSmpl) {
-    status = WebRtcSpeex_Encode(_encoderInstPtr, &_inAudio[_inAudioIxRead],
-                                _encodingRate);
+  while (num_encoded_samples < frame_len_smpl_) {
+    status = WebRtcSpeex_Encode(encoder_inst_ptr_,
+                                &in_audio_[in_audio_ix_read_], encoding_rate_);
 
     // increment the read index this tell the caller that how far
     // we have gone forward in reading the audio buffer
-    _inAudioIxRead += _samplesIn20MsAudio;
-    numEncodedSamples += _samplesIn20MsAudio;
+    in_audio_ix_read_ += samples_in_20ms_audio_;
+    num_encoded_samples += samples_in_20ms_audio_;
 
     if (status < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "Error in Speex encoder");
       return status;
     }
 
     // Update VAD, if internal DTX is used
-    if (_hasInternalDTX && _dtxEnabled) {
-      _vadLabel[n++] = status;
-      _vadLabel[n++] = status;
+    if (has_internal_dtx_ && dtx_enabled_) {
+      vad_label_[n++] = status;
+      vad_label_[n++] = status;
     }
 
     if (status == 0) {
       // This frame is detected as inactive. We need send whatever
       // encoded so far.
-      *bitStreamLenByte = WebRtcSpeex_GetBitstream(_encoderInstPtr,
-                                                   (WebRtc_Word16*) bitStream);
-
-      return *bitStreamLenByte;
+      *bitstream_len_byte = WebRtcSpeex_GetBitstream(encoder_inst_ptr_,
+                                                     (WebRtc_Word16*)bitstream);
+      return *bitstream_len_byte;
     }
   }
 
-  *bitStreamLenByte = WebRtcSpeex_GetBitstream(_encoderInstPtr,
-                                               (WebRtc_Word16*) bitStream);
-  return *bitStreamLenByte;
+  *bitstream_len_byte = WebRtcSpeex_GetBitstream(encoder_inst_ptr_,
+                                                 (WebRtc_Word16*)bitstream);
+  return *bitstream_len_byte;
 }
 
-WebRtc_Word16 ACMSPEEX::DecodeSafe(WebRtc_UWord8* /* bitStream */,
-                                   WebRtc_Word16 /* bitStreamLenByte */,
+WebRtc_Word16 ACMSPEEX::DecodeSafe(WebRtc_UWord8* /* bitstream */,
+                                   WebRtc_Word16 /* bitstream_len_byte */,
                                    WebRtc_Word16* /* audio */,
-                                   WebRtc_Word16* /* audioSamples */,
-                                   WebRtc_Word8* /* speechType */) {
+                                   WebRtc_Word16* /* audio_samples */,
+                                   WebRtc_Word8* /* speech_type */) {
   return 0;
 }
 
 WebRtc_Word16 ACMSPEEX::EnableDTX() {
-  if (_dtxEnabled) {
+  if (dtx_enabled_) {
     return 0;
-  } else if (_encoderExist) {  // check if encoder exist
+  } else if (encoder_exist_) {  // check if encoder exist
     // enable DTX
-    if (WebRtcSpeex_EncoderInit(_encoderInstPtr, (_vbrEnabled ? 1 : 0),
-                                _complMode, 1) < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    if (WebRtcSpeex_EncoderInit(encoder_inst_ptr_, (vbr_enabled_ ? 1 : 0),
+                                compl_mode_, 1) < 0) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "Cannot enable DTX for Speex");
       return -1;
     }
-    _dtxEnabled = true;
+    dtx_enabled_ = true;
     return 0;
   } else {
     return -1;
@@ -234,17 +235,17 @@
 }
 
 WebRtc_Word16 ACMSPEEX::DisableDTX() {
-  if (!_dtxEnabled) {
+  if (!dtx_enabled_) {
     return 0;
-  } else if (_encoderExist) {  // check if encoder exist
+  } else if (encoder_exist_) {  // check if encoder exist
     // disable DTX
-    if (WebRtcSpeex_EncoderInit(_encoderInstPtr, (_vbrEnabled ? 1 : 0),
-                                _complMode, 0) < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    if (WebRtcSpeex_EncoderInit(encoder_inst_ptr_, (vbr_enabled_ ? 1 : 0),
+                                compl_mode_, 0) < 0) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "Cannot disable DTX for Speex");
       return -1;
     }
-    _dtxEnabled = false;
+    dtx_enabled_ = false;
     return 0;
   } else {
     // encoder doesn't exists, therefore disabling is harmless
@@ -254,54 +255,55 @@
   return 0;
 }
 
-WebRtc_Word16 ACMSPEEX::InternalInitEncoder(WebRtcACMCodecParams* codecParams) {
+WebRtc_Word16 ACMSPEEX::InternalInitEncoder(
+    WebRtcACMCodecParams* codec_params) {
   // sanity check
-  if (_encoderInstPtr == NULL) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  if (encoder_inst_ptr_ == NULL) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Cannot initialize Speex encoder, instance does not exist");
     return -1;
   }
 
-  WebRtc_Word16 status = SetBitRateSafe((codecParams->codecInstant).rate);
+  WebRtc_Word16 status = SetBitRateSafe((codec_params->codecInstant).rate);
   status +=
-      (WebRtcSpeex_EncoderInit(_encoderInstPtr, _vbrEnabled, _complMode,
-                               ((codecParams->enableDTX) ? 1 : 0)) < 0) ?
-          -1 : 0;
+      (WebRtcSpeex_EncoderInit(encoder_inst_ptr_, vbr_enabled_, compl_mode_,
+                               ((codec_params->enable_dtx) ? 1 : 0)) < 0) ?
+                                   -1 : 0;
 
   if (status >= 0) {
     return 0;
   } else {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Error in initialization of Speex encoder");
     return -1;
   }
 }
 
 WebRtc_Word16 ACMSPEEX::InternalInitDecoder(
-    WebRtcACMCodecParams* /* codecParams */) {
+    WebRtcACMCodecParams* /* codec_params */) {
   WebRtc_Word16 status;
 
   // sanity check
-  if (_decoderInstPtr == NULL) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+  if (decoder_inst_ptr_ == NULL) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Cannot initialize Speex decoder, instance does not exist");
     return -1;
   }
-  status = ((WebRtcSpeex_DecoderInit(_decoderInstPtr) < 0) ? -1 : 0);
+  status = ((WebRtcSpeex_DecoderInit(decoder_inst_ptr_) < 0) ? -1 : 0);
 
   if (status >= 0) {
     return 0;
   } else {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Error in initialization of Speex decoder");
     return -1;
   }
 }
 
-WebRtc_Word32 ACMSPEEX::CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                                 const CodecInst& codecInst) {
-  if (!_decoderInitialized) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+WebRtc_Word32 ACMSPEEX::CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                                 const CodecInst& codec_inst) {
+  if (!decoder_initialized_) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Error, Speex decoder is not initialized");
     return -1;
   }
@@ -311,26 +313,26 @@
   // Then call NetEQ to add the codec to its
   // database.
 
-  switch (_samplingFrequency) {
+  switch (sampling_frequency_) {
     case 8000: {
-      SET_CODEC_PAR((codecDef), kDecoderSPEEX_8, codecInst.pltype,
-                    _decoderInstPtr, 8000);
+      SET_CODEC_PAR((codec_def), kDecoderSPEEX_8, codec_inst.pltype,
+                    decoder_inst_ptr_, 8000);
       break;
     }
     case 16000: {
-      SET_CODEC_PAR((codecDef), kDecoderSPEEX_16, codecInst.pltype,
-                    _decoderInstPtr, 16000);
+      SET_CODEC_PAR((codec_def), kDecoderSPEEX_16, codec_inst.pltype,
+                    decoder_inst_ptr_, 16000);
       break;
     }
     default: {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "Unsupported sampling frequency for Speex");
 
       return -1;
     }
   }
 
-  SET_SPEEX_FUNCTIONS((codecDef));
+  SET_SPEEX_FUNCTIONS((codec_def));
   return 0;
 }
 
@@ -339,43 +341,43 @@
 }
 
 WebRtc_Word16 ACMSPEEX::InternalCreateEncoder() {
-  return WebRtcSpeex_CreateEnc(&_encoderInstPtr, _samplingFrequency);
+  return WebRtcSpeex_CreateEnc(&encoder_inst_ptr_, sampling_frequency_);
 }
 
 void ACMSPEEX::DestructEncoderSafe() {
-  if (_encoderInstPtr != NULL) {
-    WebRtcSpeex_FreeEnc(_encoderInstPtr);
-    _encoderInstPtr = NULL;
+  if (encoder_inst_ptr_ != NULL) {
+    WebRtcSpeex_FreeEnc(encoder_inst_ptr_);
+    encoder_inst_ptr_ = NULL;
   }
   // there is no encoder set the following
-  _encoderExist = false;
-  _encoderInitialized = false;
-  _encodingRate = 0;
+  encoder_exist_ = false;
+  encoder_initialized_ = false;
+  encoding_rate_ = 0;
 }
 
 WebRtc_Word16 ACMSPEEX::InternalCreateDecoder() {
-  return WebRtcSpeex_CreateDec(&_decoderInstPtr, _samplingFrequency, 1);
+  return WebRtcSpeex_CreateDec(&decoder_inst_ptr_, sampling_frequency_, 1);
 }
 
 void ACMSPEEX::DestructDecoderSafe() {
-  if (_decoderInstPtr != NULL) {
-    WebRtcSpeex_FreeDec(_decoderInstPtr);
-    _decoderInstPtr = NULL;
+  if (decoder_inst_ptr_ != NULL) {
+    WebRtcSpeex_FreeDec(decoder_inst_ptr_);
+    decoder_inst_ptr_ = NULL;
   }
   // there is no encoder instance set the followings
-  _decoderExist = false;
-  _decoderInitialized = false;
+  decoder_exist_ = false;
+  decoder_initialized_ = false;
 }
 
 WebRtc_Word16 ACMSPEEX::SetBitRateSafe(const WebRtc_Word32 rate) {
   // Check if changed rate
-  if (rate == _encodingRate) {
+  if (rate == encoding_rate_) {
     return 0;
   } else if (rate > 2000) {
-    _encodingRate = rate;
-    _encoderParams.codecInstant.rate = rate;
+    encoding_rate_ = rate;
+    encoder_params_.codecInstant.rate = rate;
   } else {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                  "Unsupported encoding rate for Speex");
 
     return -1;
@@ -384,31 +386,30 @@
   return 0;
 }
 
-void ACMSPEEX::InternalDestructEncoderInst(void* ptrInst) {
-  if (ptrInst != NULL) {
-    WebRtcSpeex_FreeEnc((SPEEX_encinst_t_*) ptrInst);
+void ACMSPEEX::InternalDestructEncoderInst(void* ptr_inst) {
+  if (ptr_inst != NULL) {
+    WebRtcSpeex_FreeEnc((SPEEX_encinst_t_*) ptr_inst);
   }
   return;
 }
 
 #ifdef UNUSEDSPEEX
 
-// This API is currently not in use. If requested to be able to enable/disable VBR
-// an ACM API need to be added.
+// This API is currently not in use. If requested to be able to enable/disable
+// VBR an ACM API need to be added.
 WebRtc_Word16 ACMSPEEX::EnableVBR() {
-  if (_vbrEnabled) {
+  if (vbr_enabled_) {
     return 0;
-  } else if (_encoderExist)  // check if encoder exist
-  {
+  } else if (encoder_exist_) {  // check if encoder exist
     // enable Variable Bit Rate (VBR)
-    if (WebRtcSpeex_EncoderInit(_encoderInstPtr, 1, _complMode,
-                                (_dtxEnabled ? 1 : 0)) < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    if (WebRtcSpeex_EncoderInit(encoder_inst_ptr_, 1, compl_mode_,
+                                (dtx_enabled_ ? 1 : 0)) < 0) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "Cannot enable VBR mode for Speex");
 
       return -1;
     }
-    _vbrEnabled = true;
+    vbr_enabled_ = true;
     return 0;
   } else {
     return -1;
@@ -418,18 +419,18 @@
 // This API is currently not in use. If requested to be able to enable/disable
 // VBR an ACM API need to be added.
 WebRtc_Word16 ACMSPEEX::DisableVBR() {
-  if (!_vbrEnabled) {
+  if (!vbr_enabled_) {
     return 0;
-  } else if (_encoderExist) {  // check if encoder exist
+  } else if (encoder_exist_) {  // check if encoder exist
     // disable DTX
-    if (WebRtcSpeex_EncoderInit(_encoderInstPtr, 0, _complMode,
-                                (_dtxEnabled ? 1 : 0)) < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    if (WebRtcSpeex_EncoderInit(encoder_inst_ptr_, 0, compl_mode_,
+                                (dtx_enabled_ ? 1 : 0)) < 0) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "Cannot disable DTX for Speex");
 
       return -1;
     }
-    _vbrEnabled = false;
+    vbr_enabled_ = false;
     return 0;
   } else {
     // encoder doesn't exists, therefore disabling is harmless
@@ -441,17 +442,17 @@
 // an ACM API need to be added.
 WebRtc_Word16 ACMSPEEX::SetComplMode(WebRtc_Word16 mode) {
   // Check if new mode
-  if (mode == _complMode) {
+  if (mode == compl_mode_) {
     return 0;
-  } else if (_encoderExist) {  // check if encoder exist
+  } else if (encoder_exist_) {  // check if encoder exist
     // Set new mode
-    if (WebRtcSpeex_EncoderInit(_encoderInstPtr, 0, mode, (_dtxEnabled ? 1 : 0))
-        < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _uniqueID,
+    if (WebRtcSpeex_EncoderInit(encoder_inst_ptr_, 0, mode,
+                                (dtx_enabled_ ? 1 : 0)) < 0) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, unique_id_,
                    "Error in complexity mode for Speex");
       return -1;
     }
-    _complMode = mode;
+    compl_mode_ = mode;
     return 0;
   } else {
     // encoder doesn't exists, therefore disabling is harmless
diff --git a/webrtc/modules/audio_coding/main/source/acm_speex.h b/webrtc/modules/audio_coding/main/source/acm_speex.h
index ee31daf..d1cd840 100644
--- a/webrtc/modules/audio_coding/main/source/acm_speex.h
+++ b/webrtc/modules/audio_coding/main/source/acm_speex.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_SPEEX_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_SPEEX_H_
 
-#include "acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
 
 // forward declaration
 struct SPEEX_encinst_t_;
@@ -21,27 +21,28 @@
 
 class ACMSPEEX : public ACMGenericCodec {
  public:
-  ACMSPEEX(WebRtc_Word16 codecID);
+  explicit ACMSPEEX(WebRtc_Word16 codec_id);
   ~ACMSPEEX();
+
   // for FEC
   ACMGenericCodec* CreateInstance(void);
 
   WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
-                               WebRtc_Word16* bitStreamLenByte);
+                               WebRtc_Word16* bitstream_len_byte);
 
-  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codec_params);
 
-  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);
+  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codec_params);
 
  protected:
-  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
-                           WebRtc_Word16 bitStreamLenByte,
+  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitstream,
+                           WebRtc_Word16 bitstream_len_byte,
                            WebRtc_Word16* audio,
-                           WebRtc_Word16* audioSamples,
-                           WebRtc_Word8* speechType);
+                           WebRtc_Word16* audio_samples,
+                           WebRtc_Word8* speech_type);
 
-  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
-                         const CodecInst& codecInst);
+  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codec_def,
+                         const CodecInst& codec_inst);
 
   void DestructEncoderSafe();
 
@@ -51,7 +52,7 @@
 
   WebRtc_Word16 InternalCreateDecoder();
 
-  void InternalDestructEncoderInst(void* ptrInst);
+  void InternalDestructEncoderInst(void* ptr_inst);
 
   WebRtc_Word16 SetBitRateSafe(const WebRtc_Word32 rate);
 
@@ -67,13 +68,13 @@
   WebRtc_Word16 SetComplMode(WebRtc_Word16 mode);
 #endif
 
-  SPEEX_encinst_t_* _encoderInstPtr;
-  SPEEX_decinst_t_* _decoderInstPtr;
-  WebRtc_Word16 _complMode;
-  bool _vbrEnabled;
-  WebRtc_Word32 _encodingRate;
-  WebRtc_Word16 _samplingFrequency;
-  WebRtc_UWord16 _samplesIn20MsAudio;
+  SPEEX_encinst_t_* encoder_inst_ptr_;
+  SPEEX_decinst_t_* decoder_inst_ptr_;
+  WebRtc_Word16 compl_mode_;
+  bool vbr_enabled_;
+  WebRtc_Word32 encoding_rate_;
+  WebRtc_Word16 sampling_frequency_;
+  WebRtc_UWord16 samples_in_20ms_audio_;
 };
 
 }  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/source/audio_coding_module.cc b/webrtc/modules/audio_coding/main/source/audio_coding_module.cc
index 12ebf00..6891305 100644
--- a/webrtc/modules/audio_coding/main/source/audio_coding_module.cc
+++ b/webrtc/modules/audio_coding/main/source/audio_coding_module.cc
@@ -8,10 +8,13 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "acm_dtmf_detection.h"
-#include "audio_coding_module.h"
-#include "audio_coding_module_impl.h"
-#include "trace.h"
+#include "webrtc/modules/audio_coding/main/interface/audio_coding_module.h"
+
+#include "webrtc/common_types.h"
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_dtmf_detection.h"
+#include "webrtc/modules/audio_coding/main/source/audio_coding_module_impl.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 namespace webrtc {
 
@@ -31,10 +34,10 @@
 }
 
 // Get supported codec param with id
-WebRtc_Word32 AudioCodingModule::Codec(const WebRtc_UWord8 listId,
+WebRtc_Word32 AudioCodingModule::Codec(const WebRtc_UWord8 list_id,
                                        CodecInst& codec) {
   // Get the codec settings for the codec with the given list ID
-  return ACMCodecDB::Codec(listId, &codec);
+  return ACMCodecDB::Codec(list_id, &codec);
 }
 
 // Get supported codec Param with name, frequency and number of channels.
@@ -74,13 +77,13 @@
 
 // Checks the validity of the parameters of the given codec
 bool AudioCodingModule::IsCodecValid(const CodecInst& codec) {
-  int mirrorID;
-  char errMsg[500];
+  int mirror_id;
+  char err_msg[500];
 
-  int codecNumber = ACMCodecDB::CodecNumber(&codec, &mirrorID, errMsg, 500);
+  int codec_number = ACMCodecDB::CodecNumber(&codec, &mirror_id, err_msg, 500);
 
-  if (codecNumber < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, -1, errMsg);
+  if (codec_number < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, -1, err_msg);
     return false;
   } else {
     return true;
diff --git a/webrtc/modules/audio_coding/main/source/audio_coding_module_impl.cc b/webrtc/modules/audio_coding/main/source/audio_coding_module_impl.cc
index 7b47b12..2ce5abb 100644
--- a/webrtc/modules/audio_coding/main/source/audio_coding_module_impl.cc
+++ b/webrtc/modules/audio_coding/main/source/audio_coding_module_impl.cc
@@ -8,23 +8,20 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "audio_coding_module_impl.h"
+#include "webrtc/modules/audio_coding/main/source/audio_coding_module_impl.h"
 
 #include <assert.h>
 #include <stdlib.h>
-#ifdef ACM_QA_TEST
-#   include <stdio.h>
-#endif
 
-#include "acm_codec_database.h"
-#include "acm_common_defs.h"
-#include "acm_dtmf_detection.h"
-#include "acm_generic_codec.h"
-#include "acm_resampler.h"
-#include "critical_section_wrapper.h"
-#include "engine_configurations.h"
-#include "rw_lock_wrapper.h"
-#include "trace.h"
+#include "webrtc/engine_configurations.h"
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_common_defs.h"
+#include "webrtc/modules/audio_coding/main/source/acm_dtmf_detection.h"
+#include "webrtc/modules/audio_coding/main/source/acm_generic_codec.h"
+#include "webrtc/modules/audio_coding/main/source/acm_resampler.h"
+#include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
+#include "webrtc/system_wrappers/interface/rw_lock_wrapper.h"
+#include "webrtc/system_wrappers/interface/trace.h"
 
 namespace webrtc {
 
@@ -105,65 +102,66 @@
 }  // namespace
 
 AudioCodingModuleImpl::AudioCodingModuleImpl(const WebRtc_Word32 id)
-    : _packetizationCallback(NULL),
-      _id(id),
-      _lastTimestamp(0xD87F3F9F),
-      _lastInTimestamp(0xD87F3F9F),
-      _sendCodecInst(),
-      _cng_nb_pltype(255),
-      _cng_wb_pltype(255),
-      _cng_swb_pltype(255),
-      _cng_fb_pltype(255),
-      _red_pltype(255),
-      _vadEnabled(false),
-      _dtxEnabled(false),
-      _vadMode(VADNormal),
-      _stereoReceiveRegistered(false),
-      _stereoSend(false),
-      _prev_received_channel(0),
-      _expected_channels(1),
-      _currentSendCodecIdx(-1),
-      _current_receive_codec_idx(-1),
-      _sendCodecRegistered(false),
-      _acmCritSect(CriticalSectionWrapper::CreateCriticalSection()),
-      _vadCallback(NULL),
-      _lastRecvAudioCodecPlType(255),
-      _isFirstRED(true),
-      _fecEnabled(false),
-      _lastFECTimestamp(0),
-      _receiveREDPayloadType(255),
-      _previousPayloadType(255),
-      _dummyRTPHeader(NULL),
-      _recvPlFrameSizeSmpls(0),
-      _receiverInitialized(false),
-      _dtmfDetector(NULL),
-      _dtmfCallback(NULL),
-      _lastDetectedTone(kACMToneEnd),
-      _callbackCritSect(CriticalSectionWrapper::CreateCriticalSection()),
-      _secondarySendCodecInst(),
-      _secondaryEncoder(NULL) {
+    : packetization_callback_(NULL),
+      id_(id),
+      last_timestamp_(0xD87F3F9F),
+      last_in_timestamp_(0xD87F3F9F),
+      send_codec_inst_(),
+      cng_nb_pltype_(255),
+      cng_wb_pltype_(255),
+      cng_swb_pltype_(255),
+      cng_fb_pltype_(255),
+      red_pltype_(255),
+      vad_enabled_(false),
+      dtx_enabled_(false),
+      vad_mode_(VADNormal),
+      stereo_receive_registered_(false),
+      stereo_send_(false),
+      prev_received_channel_(0),
+      expected_channels_(1),
+      current_send_codec_idx_(-1),
+      current_receive_codec_idx_(-1),
+      send_codec_registered_(false),
+      acm_crit_sect_(CriticalSectionWrapper::CreateCriticalSection()),
+      vad_callback_(NULL),
+      last_recv_audio_codec_pltype_(255),
+      is_first_red_(true),
+      fec_enabled_(false),
+      last_fec_timestamp_(0),
+      receive_red_pltype_(255),
+      previous_pltype_(255),
+      dummy_rtp_header_(NULL),
+      recv_pl_frame_size_smpls_(0),
+      receiver_initialized_(false),
+      dtmf_detector_(NULL),
+      dtmf_callback_(NULL),
+      last_detected_tone_(kACMToneEnd),
+      callback_crit_sect_(CriticalSectionWrapper::CreateCriticalSection()),
+      secondary_send_codec_inst_(),
+      secondary_encoder_(NULL) {
 
   // Nullify send codec memory, set payload type and set codec name to
   // invalid values.
   const char no_name[] = "noCodecRegistered";
-  strncpy(_sendCodecInst.plname, no_name, RTP_PAYLOAD_NAME_SIZE - 1);
-  _sendCodecInst.pltype = -1;
+  strncpy(send_codec_inst_.plname, no_name, RTP_PAYLOAD_NAME_SIZE - 1);
+  send_codec_inst_.pltype = -1;
 
-  strncpy(_secondarySendCodecInst.plname, no_name, RTP_PAYLOAD_NAME_SIZE - 1);
-  _secondarySendCodecInst.pltype = -1;
+  strncpy(secondary_send_codec_inst_.plname, no_name,
+          RTP_PAYLOAD_NAME_SIZE - 1);
+  secondary_send_codec_inst_.pltype = -1;
 
   for (int i = 0; i < ACMCodecDB::kMaxNumCodecs; i++) {
-    _codecs[i] = NULL;
-    _registeredPlTypes[i] = -1;
-    _stereoReceive[i] = false;
-    _slaveCodecs[i] = NULL;
-    _mirrorCodecIdx[i] = -1;
+    codecs_[i] = NULL;
+    registered_pltypes_[i] = -1;
+    stereo_receive_[i] = false;
+    slave_codecs_[i] = NULL;
+    mirror_codec_idx_[i] = -1;
   }
 
-  _netEq.SetUniqueId(_id);
+  neteq_.set_id(id_);
 
   // Allocate memory for RED.
-  _redBuffer = new WebRtc_UWord8[MAX_PAYLOAD_SIZE_BYTE];
+  red_buffer_ = new WebRtc_UWord8[MAX_PAYLOAD_SIZE_BYTE];
 
   // TODO(turajs): This might not be exactly how this class is supposed to work.
   // The external usage might be that |fragmentationVectorSize| has to match
@@ -175,166 +173,127 @@
   // space matches |fragmentationVectorSize|, therefore, this should not cause
   // any problem. A better approach is not using RTPFragmentationHeader as
   // member variable, instead, use an ACM-specific structure to hold RED-related
-  // data.
-  _fragmentation.VerifyAndAllocateFragmentationHeader(
+  // data. See module_common_type.h for the definition of
+  // RTPFragmentationHeader.
+  fragmentation_.VerifyAndAllocateFragmentationHeader(
       kMaxNumFragmentationVectors);
 
-  // Register the default payload type for RED and for CNG for the three
-  // frequencies 8, 16 and 32 kHz.
+  // Register the default payload type for RED and for CNG at sampling rates of
+  // 8, 16, 32 and 48 kHz.
   for (int i = (ACMCodecDB::kNumCodecs - 1); i >= 0; i--) {
     if (IsCodecRED(i)) {
-      _red_pltype = static_cast<uint8_t>(ACMCodecDB::database_[i].pltype);
+      red_pltype_ = static_cast<uint8_t>(ACMCodecDB::database_[i].pltype);
     } else if (IsCodecCN(i)) {
       if (ACMCodecDB::database_[i].plfreq == 8000) {
-        _cng_nb_pltype = static_cast<uint8_t>(ACMCodecDB::database_[i].pltype);
+        cng_nb_pltype_ = static_cast<uint8_t>(ACMCodecDB::database_[i].pltype);
       } else if (ACMCodecDB::database_[i].plfreq == 16000) {
-        _cng_wb_pltype = static_cast<uint8_t>(ACMCodecDB::database_[i].pltype);
+        cng_wb_pltype_ = static_cast<uint8_t>(ACMCodecDB::database_[i].pltype);
       } else if (ACMCodecDB::database_[i].plfreq == 32000) {
-        _cng_swb_pltype = static_cast<uint8_t>(ACMCodecDB::database_[i].pltype);
+        cng_swb_pltype_ = static_cast<uint8_t>(ACMCodecDB::database_[i].pltype);
       } else if (ACMCodecDB::database_[i].plfreq == 48000) {
-        _cng_fb_pltype = static_cast<uint8_t>(ACMCodecDB::database_[i].pltype);
+        cng_fb_pltype_ = static_cast<uint8_t>(ACMCodecDB::database_[i].pltype);
       }
     }
   }
 
   if (InitializeReceiverSafe() < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-                 "Cannot initialize reciever");
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                 "Cannot initialize receiver");
   }
-#ifdef ACM_QA_TEST
-  char file_name[500];
-  sprintf(file_name, "ACM_QA_incomingPL_%03d_%d%d%d%d%d%d.dat", _id,
-          rand() % 10, rand() % 10, rand() % 10, rand() % 10, rand() % 10,
-          rand() % 10);
-  _incomingPL = fopen(file_name, "wb");
-  sprintf(file_name, "ACM_QA_outgoingPL_%03d_%d%d%d%d%d%d.dat", _id,
-          rand() % 10, rand() % 10, rand() % 10, rand() % 10, rand() % 10,
-          rand() % 10);
-  _outgoingPL = fopen(file_name, "wb");
-#endif
-
   WEBRTC_TRACE(webrtc::kTraceMemory, webrtc::kTraceAudioCoding, id, "Created");
 }
 
 AudioCodingModuleImpl::~AudioCodingModuleImpl() {
   {
-    CriticalSectionScoped lock(_acmCritSect);
-    _currentSendCodecIdx = -1;
+    CriticalSectionScoped lock(acm_crit_sect_);
+    current_send_codec_idx_ = -1;
 
     for (int i = 0; i < ACMCodecDB::kMaxNumCodecs; i++) {
-      if (_codecs[i] != NULL) {
+      if (codecs_[i] != NULL) {
         // True stereo codecs share the same memory for master and
         // slave, so slave codec need to be nullified here, since the
         // memory will be deleted.
-        if (_slaveCodecs[i] == _codecs[i]) {
-          _slaveCodecs[i] = NULL;
+        if (slave_codecs_[i] == codecs_[i]) {
+          slave_codecs_[i] = NULL;
         }
 
         // Mirror index holds the address of the codec memory.
-        assert(_mirrorCodecIdx[i] > -1);
-        if (_codecs[_mirrorCodecIdx[i]] != NULL) {
-          delete _codecs[_mirrorCodecIdx[i]];
-          _codecs[_mirrorCodecIdx[i]] = NULL;
+        assert(mirror_codec_idx_[i] > -1);
+        if (codecs_[mirror_codec_idx_[i]] != NULL) {
+          delete codecs_[mirror_codec_idx_[i]];
+          codecs_[mirror_codec_idx_[i]] = NULL;
         }
 
-        _codecs[i] = NULL;
+        codecs_[i] = NULL;
       }
 
-      if (_slaveCodecs[i] != NULL) {
+      if (slave_codecs_[i] != NULL) {
         // Delete memory for stereo usage of mono codecs.
-        assert(_mirrorCodecIdx[i] > -1);
-        if (_slaveCodecs[_mirrorCodecIdx[i]] != NULL) {
-          delete _slaveCodecs[_mirrorCodecIdx[i]];
-          _slaveCodecs[_mirrorCodecIdx[i]] = NULL;
+        assert(mirror_codec_idx_[i] > -1);
+        if (slave_codecs_[mirror_codec_idx_[i]] != NULL) {
+          delete slave_codecs_[mirror_codec_idx_[i]];
+          slave_codecs_[mirror_codec_idx_[i]] = NULL;
         }
-        _slaveCodecs[i] = NULL;
+        slave_codecs_[i] = NULL;
       }
     }
 
-    if (_dtmfDetector != NULL) {
-      delete _dtmfDetector;
-      _dtmfDetector = NULL;
+    if (dtmf_detector_ != NULL) {
+      delete dtmf_detector_;
+      dtmf_detector_ = NULL;
     }
-    if (_dummyRTPHeader != NULL) {
-      delete _dummyRTPHeader;
-      _dummyRTPHeader = NULL;
+    if (dummy_rtp_header_ != NULL) {
+      delete dummy_rtp_header_;
+      dummy_rtp_header_ = NULL;
     }
-    if (_redBuffer != NULL) {
-      delete[] _redBuffer;
-      _redBuffer = NULL;
+    if (red_buffer_ != NULL) {
+      delete[] red_buffer_;
+      red_buffer_ = NULL;
     }
   }
 
-#ifdef ACM_QA_TEST
-  if (_incomingPL != NULL) {
-    fclose(_incomingPL);
-  }
+  delete callback_crit_sect_;
+  callback_crit_sect_ = NULL;
 
-  if (_outgoingPL != NULL) {
-    fclose(_outgoingPL);
-  }
-#endif
-
-  delete _callbackCritSect;
-  _callbackCritSect = NULL;
-
-  delete _acmCritSect;
-  _acmCritSect = NULL;
-  WEBRTC_TRACE(webrtc::kTraceMemory, webrtc::kTraceAudioCoding, _id,
+  delete acm_crit_sect_;
+  acm_crit_sect_ = NULL;
+  WEBRTC_TRACE(webrtc::kTraceMemory, webrtc::kTraceAudioCoding, id_,
                "Destroyed");
 }
 
 WebRtc_Word32 AudioCodingModuleImpl::ChangeUniqueId(const WebRtc_Word32 id) {
   {
-    CriticalSectionScoped lock(_acmCritSect);
-    _id = id;
+    CriticalSectionScoped lock(acm_crit_sect_);
+    id_ = id;
 
-#ifdef ACM_QA_TEST
-    if (_incomingPL != NULL) {
-      fclose (_incomingPL);
-    }
-    if (_outgoingPL != NULL) {
-      fclose (_outgoingPL);
-    }
-    char fileName[500];
-    sprintf(fileName, "ACM_QA_incomingPL_%03d_%d%d%d%d%d%d.dat", _id,
-            rand() % 10, rand() % 10, rand() % 10, rand() % 10, rand() % 10,
-            rand() % 10);
-    _incomingPL = fopen(fileName, "wb");
-    sprintf(fileName, "ACM_QA_outgoingPL_%03d_%d%d%d%d%d%d.dat", _id,
-            rand() % 10, rand() % 10, rand() % 10, rand() % 10, rand() % 10,
-            rand() % 10);
-    _outgoingPL = fopen(fileName, "wb");
-#endif
-
-    for (int i = 0; i < ACMCodecDB::kMaxNumCodecs; i++) {
-      if (_codecs[i] != NULL) {
-        _codecs[i]->SetUniqueID(id);
+   for (int i = 0; i < ACMCodecDB::kMaxNumCodecs; i++) {
+      if (codecs_[i] != NULL) {
+        codecs_[i]->SetUniqueID(id);
       }
     }
   }
 
-  _netEq.SetUniqueId(_id);
+  neteq_.set_id(id_);
   return 0;
 }
 
 // Returns the number of milliseconds until the module want a
 // worker thread to call Process.
 WebRtc_Word32 AudioCodingModuleImpl::TimeUntilNextProcess() {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
   if (!HaveValidEncoder("TimeUntilNextProcess")) {
     return -1;
   }
-  return _codecs[_currentSendCodecIdx]->SamplesLeftToEncode() /
-      (_sendCodecInst.plfreq / 1000);
+  return codecs_[current_send_codec_idx_]->SamplesLeftToEncode() /
+      (send_codec_inst_.plfreq / 1000);
 }
 
 WebRtc_Word32 AudioCodingModuleImpl::Process() {
   bool dual_stream;
   {
-    CriticalSectionScoped lock(_acmCritSect);
-    dual_stream = (_secondaryEncoder.get() != NULL);
+    CriticalSectionScoped lock(acm_crit_sect_);
+    dual_stream = (secondary_encoder_.get() != NULL);
   }
   if (dual_stream) {
     return ProcessDualStream();
@@ -356,11 +315,11 @@
   assert(encoding_type == kActiveNormalEncoded);
   assert(len_bytes > 0);
 
-  _fragmentation.fragmentationLength[fragmentation_index] = len_bytes;
-  _fragmentation.fragmentationPlType[fragmentation_index] = payload_type;
-  _fragmentation.fragmentationTimeDiff[fragmentation_index] =
+  fragmentation_.fragmentationLength[fragmentation_index] = len_bytes;
+  fragmentation_.fragmentationPlType[fragmentation_index] = payload_type;
+  fragmentation_.fragmentationTimeDiff[fragmentation_index] =
       static_cast<WebRtc_UWord16>(current_timestamp - rtp_timestamp);
-  _fragmentation.fragmentationVectorSize++;
+  fragmentation_.fragmentationVectorSize++;
   return len_bytes;
 }
 
@@ -378,29 +337,29 @@
   uint8_t my_red_payload_type;
 
   {
-    CriticalSectionScoped lock(_acmCritSect);
+    CriticalSectionScoped lock(acm_crit_sect_);
     // Check if there is an encoder before.
     if (!HaveValidEncoder("ProcessDualStream") ||
-        _secondaryEncoder.get() == NULL) {
+        secondary_encoder_.get() == NULL) {
       return -1;
     }
-    ACMGenericCodec* primary_encoder = _codecs[_currentSendCodecIdx];
+    ACMGenericCodec* primary_encoder = codecs_[current_send_codec_idx_];
     // If primary encoder has a full frame of audio to generate payload.
     bool primary_ready_to_encode = primary_encoder->HasFrameToEncode();
     // If the secondary encoder has a frame of audio to generate a payload.
-    bool secondary_ready_to_encode = _secondaryEncoder->HasFrameToEncode();
+    bool secondary_ready_to_encode = secondary_encoder_->HasFrameToEncode();
 
     if (!primary_ready_to_encode && !secondary_ready_to_encode) {
       // Nothing to send.
       return 0;
     }
     int len_bytes_previous_secondary = static_cast<int>(
-        _fragmentation.fragmentationLength[2]);
+        fragmentation_.fragmentationLength[2]);
     assert(len_bytes_previous_secondary <= MAX_PAYLOAD_SIZE_BYTE);
     bool has_previous_payload = len_bytes_previous_secondary > 0;
 
     uint32_t primary_timestamp = primary_encoder->EarliestTimestamp();
-    uint32_t secondary_timestamp = _secondaryEncoder->EarliestTimestamp();
+    uint32_t secondary_timestamp = secondary_encoder_->EarliestTimestamp();
 
     if (!has_previous_payload && !primary_ready_to_encode &&
         secondary_ready_to_encode) {
@@ -408,16 +367,17 @@
       // encoder, store the payload, and return. No packet is sent.
       int16_t len_bytes = MAX_PAYLOAD_SIZE_BYTE;
       WebRtcACMEncodingType encoding_type;
-      if (_secondaryEncoder->Encode(_redBuffer, &len_bytes, &_lastFECTimestamp,
-                                    &encoding_type) < 0) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+      if (secondary_encoder_->Encode(red_buffer_, &len_bytes,
+                                     &last_fec_timestamp_,
+                                     &encoding_type) < 0) {
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "ProcessDual(): Encoding of secondary encoder Failed");
         return -1;
       }
       assert(len_bytes > 0);
       assert(encoding_type == kActiveNormalEncoded);
       assert(len_bytes <= MAX_PAYLOAD_SIZE_BYTE);
-      _fragmentation.fragmentationLength[2] = len_bytes;
+      fragmentation_.fragmentationLength[2] = len_bytes;
       return 0;
     }
 
@@ -431,7 +391,7 @@
       index_primary = secondary_ready_to_encode ?
           TimestampLessThan(primary_timestamp, secondary_timestamp) : 0;
       index_primary += has_previous_payload ?
-          TimestampLessThan(primary_timestamp, _lastFECTimestamp) : 0;
+          TimestampLessThan(primary_timestamp, last_fec_timestamp_) : 0;
     }
 
     if (secondary_ready_to_encode) {
@@ -443,7 +403,7 @@
 
     if (has_previous_payload) {
       index_previous_secondary = primary_ready_to_encode ?
-          (1 - TimestampLessThan(primary_timestamp, _lastFECTimestamp)) : 0;
+          (1 - TimestampLessThan(primary_timestamp, last_fec_timestamp_)) : 0;
       // If secondary is ready it always have a timestamp larger than previous
       // secondary. So the index is either 0 or 1.
       index_previous_secondary += secondary_ready_to_encode ? 1 : 0;
@@ -464,32 +424,32 @@
     } else if (index_secondary == 0) {
       current_timestamp = secondary_timestamp;
     } else {
-      current_timestamp = _lastFECTimestamp;
+      current_timestamp = last_fec_timestamp_;
     }
 
-    _fragmentation.fragmentationVectorSize = 0;
+    fragmentation_.fragmentationVectorSize = 0;
     if (has_previous_payload) {
       assert(index_previous_secondary >= 0 &&
              index_previous_secondary < kMaxNumFragmentationVectors);
       assert(len_bytes_previous_secondary <= MAX_PAYLOAD_SIZE_BYTE);
       memcpy(&stream[index_previous_secondary * MAX_PAYLOAD_SIZE_BYTE],
-             _redBuffer, sizeof(stream[0]) * len_bytes_previous_secondary);
-      _fragmentation.fragmentationLength[index_previous_secondary] =
+             red_buffer_, sizeof(stream[0]) * len_bytes_previous_secondary);
+      fragmentation_.fragmentationLength[index_previous_secondary] =
           len_bytes_previous_secondary;
-      _fragmentation.fragmentationPlType[index_previous_secondary] =
-          _secondarySendCodecInst.pltype;
-      _fragmentation.fragmentationTimeDiff[index_previous_secondary] =
-          static_cast<WebRtc_UWord16>(current_timestamp - _lastFECTimestamp);
-      _fragmentation.fragmentationVectorSize++;
+      fragmentation_.fragmentationPlType[index_previous_secondary] =
+          secondary_send_codec_inst_.pltype;
+      fragmentation_.fragmentationTimeDiff[index_previous_secondary] =
+          static_cast<WebRtc_UWord16>(current_timestamp - last_fec_timestamp_);
+      fragmentation_.fragmentationVectorSize++;
     }
 
     if (primary_ready_to_encode) {
       assert(index_primary >= 0 && index_primary < kMaxNumFragmentationVectors);
       int i = index_primary * MAX_PAYLOAD_SIZE_BYTE;
-      if (EncodeFragmentation(index_primary, _sendCodecInst.pltype,
+      if (EncodeFragmentation(index_primary, send_codec_inst_.pltype,
                               current_timestamp, primary_encoder,
                               &stream[i]) < 0) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "ProcessDualStream(): Encoding of primary encoder Failed");
         return -1;
       }
@@ -499,40 +459,41 @@
       assert(index_secondary >= 0 &&
              index_secondary < kMaxNumFragmentationVectors - 1);
       int i = index_secondary * MAX_PAYLOAD_SIZE_BYTE;
-      if (EncodeFragmentation(index_secondary, _secondarySendCodecInst.pltype,
-                              current_timestamp, _secondaryEncoder.get(),
+      if (EncodeFragmentation(index_secondary,
+                              secondary_send_codec_inst_.pltype,
+                              current_timestamp, secondary_encoder_.get(),
                               &stream[i]) < 0) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "ProcessDualStream(): Encoding of secondary encoder "
                      "Failed");
         return -1;
       }
     }
     // Copy to local variable, as it will be used outside the ACM lock.
-    my_fragmentation.CopyFrom(_fragmentation);
-    my_red_payload_type = _red_pltype;
+    my_fragmentation.CopyFrom(fragmentation_);
+    my_red_payload_type = red_pltype_;
     length_bytes = 0;
-    for (int n = 0; n < _fragmentation.fragmentationVectorSize; n++) {
-      length_bytes += _fragmentation.fragmentationLength[n];
+    for (int n = 0; n < fragmentation_.fragmentationVectorSize; n++) {
+      length_bytes += fragmentation_.fragmentationLength[n];
     }
   }
 
   {
-    CriticalSectionScoped lock(_callbackCritSect);
-    if (_packetizationCallback != NULL) {
+    CriticalSectionScoped lock(callback_crit_sect_);
+    if (packetization_callback_ != NULL) {
       // Callback with payload data, including redundant data (FEC/RED).
-      if (_packetizationCallback->SendData(kAudioFrameSpeech,
-                                           my_red_payload_type,
-                                           current_timestamp, stream,
-                                           length_bytes,
-                                           &my_fragmentation) < 0) {
+      if (packetization_callback_->SendData(kAudioFrameSpeech,
+                                            my_red_payload_type,
+                                            current_timestamp, stream,
+                                            length_bytes,
+                                            &my_fragmentation) < 0) {
         return -1;
       }
     }
   }
 
   {
-    CriticalSectionScoped lock(_acmCritSect);
+    CriticalSectionScoped lock(acm_crit_sect_);
     // Now that data is sent, clean up fragmentation.
     ResetFragmentation(0);
   }
@@ -556,17 +517,17 @@
 
   // Keep the scope of the ACM critical section limited.
   {
-    CriticalSectionScoped lock(_acmCritSect);
+    CriticalSectionScoped lock(acm_crit_sect_);
     // Check if there is an encoder before.
     if (!HaveValidEncoder("ProcessSingleStream")) {
       return -1;
     }
-    status = _codecs[_currentSendCodecIdx]->Encode(stream, &length_bytes,
-                                                   &rtp_timestamp,
-                                                   &encoding_type);
+    status = codecs_[current_send_codec_idx_]->Encode(stream, &length_bytes,
+                                                      &rtp_timestamp,
+                                                      &encoding_type);
     if (status < 0) {
       // Encode failed.
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "ProcessSingleStream(): Encoding Failed");
       length_bytes = 0;
       return -1;
@@ -576,69 +537,69 @@
     } else {
       switch (encoding_type) {
         case kNoEncoding: {
-          current_payload_type = _previousPayloadType;
+          current_payload_type = previous_pltype_;
           frame_type = kFrameEmpty;
           length_bytes = 0;
           break;
         }
         case kActiveNormalEncoded:
         case kPassiveNormalEncoded: {
-          current_payload_type = (WebRtc_UWord8) _sendCodecInst.pltype;
+          current_payload_type = (WebRtc_UWord8) send_codec_inst_.pltype;
           frame_type = kAudioFrameSpeech;
           break;
         }
         case kPassiveDTXNB: {
-          current_payload_type = _cng_nb_pltype;
+          current_payload_type = cng_nb_pltype_;
           frame_type = kAudioFrameCN;
-          _isFirstRED = true;
+          is_first_red_ = true;
           break;
         }
         case kPassiveDTXWB: {
-          current_payload_type = _cng_wb_pltype;
+          current_payload_type = cng_wb_pltype_;
           frame_type = kAudioFrameCN;
-          _isFirstRED = true;
+          is_first_red_ = true;
           break;
         }
         case kPassiveDTXSWB: {
-          current_payload_type = _cng_swb_pltype;
+          current_payload_type = cng_swb_pltype_;
           frame_type = kAudioFrameCN;
-          _isFirstRED = true;
+          is_first_red_ = true;
           break;
         }
         case kPassiveDTXFB: {
-          current_payload_type = _cng_fb_pltype;
+          current_payload_type = cng_fb_pltype_;
           frame_type = kAudioFrameCN;
-          _isFirstRED = true;
+          is_first_red_ = true;
           break;
         }
       }
       has_data_to_send = true;
-      _previousPayloadType = current_payload_type;
+      previous_pltype_ = current_payload_type;
 
       // Redundancy encode is done here. The two bitstreams packetized into
       // one RTP packet and the fragmentation points are set.
       // Only apply RED on speech data.
-      if ((_fecEnabled) &&
+      if ((fec_enabled_) &&
           ((encoding_type == kActiveNormalEncoded) ||
               (encoding_type == kPassiveNormalEncoded))) {
         // FEC is enabled within this scope.
         //
         // Note that, a special solution exists for iSAC since it is the only
-        // codec for which getRedPayload has a non-empty implementation.
+        // codec for which GetRedPayload has a non-empty implementation.
         //
         // Summary of the FEC scheme below (use iSAC as example):
         //
-        //  1st (_firstRED is true) encoded iSAC frame (primary #1) =>
-        //      - call getRedPayload() and store redundancy for packet #1 in
+        //  1st (is_first_red_ is true) encoded iSAC frame (primary #1) =>
+        //      - call GetRedPayload() and store redundancy for packet #1 in
         //        second fragment of RED buffer (old data)
         //      - drop the primary iSAC frame
         //      - don't call SendData
-        //  2nd (_firstRED is false) encoded iSAC frame (primary #2) =>
+        //  2nd (is_first_red_ is false) encoded iSAC frame (primary #2) =>
         //      - store primary #2 in 1st fragment of RED buffer and send the
         //        combined packet
         //      - the transmitted packet contains primary #2 (new) and
         //        reduncancy for packet #1 (old)
-        //      - call getRedPayload() and store redundancy for packet #2 in
+        //      - call GetRed_Payload() and store redundancy for packet #2 in
         //        second fragment of RED buffer
         //
         //  ...
@@ -648,10 +609,10 @@
         //        combined packet
         //      - the transmitted packet contains primary #N (new) and
         //        reduncancy for packet #(N-1) (old)
-        //      - call getRedPayload() and store redundancy for packet #N in
+        //      - call GetRedPayload() and store redundancy for packet #N in
         //        second fragment of RED buffer
         //
-        //  For all other codecs, getRedPayload does nothing and returns -1 =>
+        //  For all other codecs, GetRedPayload does nothing and returns -1 =>
         //  redundant data is only a copy.
         //
         //  First combined packet contains : #2 (new) and #1 (old)
@@ -664,29 +625,29 @@
 
         has_data_to_send = false;
         // Skip the following part for the first packet in a RED session.
-        if (!_isFirstRED) {
+        if (!is_first_red_) {
           // Rearrange stream such that FEC packets are included.
           // Replace stream now that we have stored current stream.
-          memcpy(stream + _fragmentation.fragmentationOffset[1], _redBuffer,
-                 _fragmentation.fragmentationLength[1]);
+          memcpy(stream + fragmentation_.fragmentationOffset[1], red_buffer_,
+                 fragmentation_.fragmentationLength[1]);
           // Update the fragmentation time difference vector, in number of
           // timestamps.
           WebRtc_UWord16 time_since_last = WebRtc_UWord16(
-              rtp_timestamp - _lastFECTimestamp);
+              rtp_timestamp - last_fec_timestamp_);
 
           // Update fragmentation vectors.
-          _fragmentation.fragmentationPlType[1] =
-              _fragmentation.fragmentationPlType[0];
-          _fragmentation.fragmentationTimeDiff[1] = time_since_last;
+          fragmentation_.fragmentationPlType[1] =
+              fragmentation_.fragmentationPlType[0];
+          fragmentation_.fragmentationTimeDiff[1] = time_since_last;
           has_data_to_send = true;
         }
 
         // Insert new packet length.
-        _fragmentation.fragmentationLength[0] = length_bytes;
+        fragmentation_.fragmentationLength[0] = length_bytes;
 
         // Insert new packet payload type.
-        _fragmentation.fragmentationPlType[0] = current_payload_type;
-        _lastFECTimestamp = rtp_timestamp;
+        fragmentation_.fragmentationPlType[0] = current_payload_type;
+        last_fec_timestamp_ = rtp_timestamp;
 
         // Can be modified by the GetRedPayload() call if iSAC is utilized.
         red_length_bytes = length_bytes;
@@ -696,69 +657,55 @@
         // First fragment is the current data (new).
         // Second fragment is the previous data (old).
         length_bytes = static_cast<WebRtc_Word16>(
-            _fragmentation.fragmentationLength[0] +
-            _fragmentation.fragmentationLength[1]);
+            fragmentation_.fragmentationLength[0] +
+            fragmentation_.fragmentationLength[1]);
 
         // Get, and store, redundant data from the encoder based on the recently
         // encoded frame.
         // NOTE - only iSAC contains an implementation; all other codecs does
         // nothing and returns -1.
-        if (_codecs[_currentSendCodecIdx]->GetRedPayload(
-            _redBuffer,
+        if (codecs_[current_send_codec_idx_]->GetRedPayload(
+            red_buffer_,
             &red_length_bytes) == -1) {
           // The codec was not iSAC => use current encoder output as redundant
           // data instead (trivial FEC scheme).
-          memcpy(_redBuffer, stream, red_length_bytes);
+          memcpy(red_buffer_, stream, red_length_bytes);
         }
 
-        _isFirstRED = false;
+        is_first_red_ = false;
         // Update payload type with RED payload type.
-        current_payload_type = _red_pltype;
+        current_payload_type = red_pltype_;
         // We have packed 2 payloads.
-        _fragmentation.fragmentationVectorSize = kNumFecFragmentationVectors;
+        fragmentation_.fragmentationVectorSize = kNumFecFragmentationVectors;
 
         // Copy to local variable, as it will be used outside ACM lock.
-        my_fragmentation.CopyFrom(_fragmentation);
+        my_fragmentation.CopyFrom(fragmentation_);
         // Store RED length.
-        _fragmentation.fragmentationLength[1] = red_length_bytes;
+        fragmentation_.fragmentationLength[1] = red_length_bytes;
       }
     }
   }
 
   if (has_data_to_send) {
-    CriticalSectionScoped lock(_callbackCritSect);
-#ifdef ACM_QA_TEST
-    if (_outgoingPL != NULL) {
-      if (fwrite(&rtp_timestamp, sizeof(WebRtc_UWord32), 1, _outgoingPL) != 1) {
-        return -1;
-      }
-      if (fwrite(&current_payload_type, sizeof(WebRtc_UWord8),
-                 1, _outgoingPL) != 1) {
-        return -1;
-      }
-      if (fwrite(&length_bytes, sizeof(WebRtc_Word16), 1, _outgoingPL) != 1) {
-        return -1;
-      }
-    }
-#endif
+    CriticalSectionScoped lock(callback_crit_sect_);
 
-    if (_packetizationCallback != NULL) {
+    if (packetization_callback_ != NULL) {
       if (fec_active) {
         // Callback with payload data, including redundant data (FEC/RED).
-        _packetizationCallback->SendData(frame_type, current_payload_type,
-                                         rtp_timestamp, stream, length_bytes,
-                                         &my_fragmentation);
+        packetization_callback_->SendData(frame_type, current_payload_type,
+                                          rtp_timestamp, stream, length_bytes,
+                                          &my_fragmentation);
       } else {
         // Callback with payload data.
-        _packetizationCallback->SendData(frame_type, current_payload_type,
-                                         rtp_timestamp, stream, length_bytes,
-                                         NULL);
+        packetization_callback_->SendData(frame_type, current_payload_type,
+                                          rtp_timestamp, stream, length_bytes,
+                                          NULL);
       }
     }
 
-    if (_vadCallback != NULL) {
+    if (vad_callback_ != NULL) {
       // Callback with VAD decision.
-      _vadCallback->InFrameType(((WebRtc_Word16) encoding_type));
+      vad_callback_->InFrameType(((WebRtc_Word16) encoding_type));
     }
   }
   return length_bytes;
@@ -770,27 +717,27 @@
 
 // Initialize send codec.
 WebRtc_Word32 AudioCodingModuleImpl::InitializeSender() {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
   // Start with invalid values.
-  _sendCodecRegistered = false;
-  _currentSendCodecIdx = -1;
-  _sendCodecInst.plname[0] = '\0';
+  send_codec_registered_ = false;
+  current_send_codec_idx_ = -1;
+  send_codec_inst_.plname[0] = '\0';
 
   // Delete all encoders to start fresh.
   for (int id = 0; id < ACMCodecDB::kMaxNumCodecs; id++) {
-    if (_codecs[id] != NULL) {
-      _codecs[id]->DestructEncoder();
+    if (codecs_[id] != NULL) {
+      codecs_[id]->DestructEncoder();
     }
   }
 
   // Initialize FEC/RED.
-  _isFirstRED = true;
-  if (_fecEnabled || _secondaryEncoder.get() != NULL) {
-    if (_redBuffer != NULL) {
-      memset(_redBuffer, 0, MAX_PAYLOAD_SIZE_BYTE);
+  is_first_red_ = true;
+  if (fec_enabled_ || secondary_encoder_.get() != NULL) {
+    if (red_buffer_ != NULL) {
+      memset(red_buffer_, 0, MAX_PAYLOAD_SIZE_BYTE);
     }
-    if (_fecEnabled) {
+    if (fec_enabled_) {
       ResetFragmentation(kNumFecFragmentationVectors);
     } else {
       ResetFragmentation(0);
@@ -801,20 +748,20 @@
 }
 
 WebRtc_Word32 AudioCodingModuleImpl::ResetEncoder() {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
   if (!HaveValidEncoder("ResetEncoder")) {
     return -1;
   }
-  return _codecs[_currentSendCodecIdx]->ResetEncoder();
+  return codecs_[current_send_codec_idx_]->ResetEncoder();
 }
 
 void AudioCodingModuleImpl::UnregisterSendCodec() {
-  CriticalSectionScoped lock(_acmCritSect);
-  _sendCodecRegistered = false;
-  _currentSendCodecIdx = -1;
+  CriticalSectionScoped lock(acm_crit_sect_);
+  send_codec_registered_ = false;
+  current_send_codec_idx_ = -1;
   // If send Codec is unregistered then remove the secondary codec as well.
-  if (_secondaryEncoder.get() != NULL)
-    _secondaryEncoder.reset();
+  if (secondary_encoder_.get() != NULL)
+    secondary_encoder_.reset();
   return;
 }
 
@@ -824,12 +771,12 @@
   my_codec = ACMCodecDB::CreateCodecInstance(&codec);
   if (my_codec == NULL) {
     // Error, could not create the codec.
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "ACMCodecDB::CreateCodecInstance() failed in CreateCodec()");
     return my_codec;
   }
-  my_codec->SetUniqueID(_id);
-  my_codec->SetNetEqDecodeLock(_netEq.DecodeLock());
+  my_codec->SetUniqueID(id_);
+  my_codec->SetNetEqDecodeLock(neteq_.DecodeLock());
 
   return my_codec;
 }
@@ -840,12 +787,12 @@
                             int acm_id,
                             int* mirror_id) {
   if ((send_codec.channels != 1) && (send_codec.channels != 2)) {
-     WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, acm_id,
-                  "Wrong number of channels (%d, only mono and stereo are "
-                  "supported) for %s encoder", send_codec.channels,
-                  is_primary_encoder ? "primary" : "secondary");
-     return -1;
-   }
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, acm_id,
+                 "Wrong number of channels (%d, only mono and stereo are "
+                 "supported) for %s encoder", send_codec.channels,
+                 is_primary_encoder ? "primary" : "secondary");
+    return -1;
+  }
 
   char error_message[500];
   int codec_id = ACMCodecDB::CodecNumber(&send_codec, mirror_id, error_message,
@@ -853,7 +800,7 @@
   if (codec_id < 0) {
     WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, acm_id,
                  error_message);
-   return -1;
+    return -1;
   }
 
   // TODO(tlegrand): Remove this check. Already taken care of in
@@ -905,16 +852,16 @@
 
 int AudioCodingModuleImpl::RegisterSecondarySendCodec(
     const CodecInst& send_codec) {
-  CriticalSectionScoped lock(_acmCritSect);
-  if (!_sendCodecRegistered) {
+  CriticalSectionScoped lock(acm_crit_sect_);
+  if (!send_codec_registered_) {
     return -1;
   }
   // Primary and Secondary codecs should have the same sampling rates.
-  if (send_codec.plfreq != _sendCodecInst.plfreq) {
+  if (send_codec.plfreq != send_codec_inst_.plfreq) {
     return -1;
   }
   int mirror_id;
-  int codec_id = IsValidSendCodec(send_codec, false, _id, &mirror_id);
+  int codec_id = IsValidSendCodec(send_codec, false, id_, &mirror_id);
   if (codec_id < 0) {
     return -1;
   }
@@ -922,47 +869,47 @@
   WebRtcACMCodecParams codec_params;
   // Initialize the codec before registering. For secondary codec VAD & DTX are
   // disabled.
-  memcpy(&(codec_params.codecInstant), &send_codec, sizeof(CodecInst));
-  codec_params.enableVAD = false;
-  codec_params.enableDTX = false;
-  codec_params.vadMode = VADNormal;
+  memcpy(&(codec_params.codec_inst), &send_codec, sizeof(CodecInst));
+  codec_params.enable_vad = false;
+  codec_params.enable_dtx = false;
+  codec_params.vad_mode = VADNormal;
   // Force initialization.
   if (encoder->InitEncoder(&codec_params, true) < 0) {
     // Could not initialize, therefore cannot be registered.
     delete encoder;
     return -1;
   }
-  _secondaryEncoder.reset(encoder);
-  memcpy(&_secondarySendCodecInst, &send_codec, sizeof(send_codec));
+  secondary_encoder_.reset(encoder);
+  memcpy(&secondary_send_codec_inst_, &send_codec, sizeof(send_codec));
 
   // Disable VAD & DTX.
   SetVADSafe(false, false, VADNormal);
 
   // Cleaning.
-  if (_redBuffer) {
-    memset(_redBuffer, 0, MAX_PAYLOAD_SIZE_BYTE);
+  if (red_buffer_) {
+    memset(red_buffer_, 0, MAX_PAYLOAD_SIZE_BYTE);
   }
   ResetFragmentation(0);
   return 0;
 }
 
 void AudioCodingModuleImpl::UnregisterSecondarySendCodec() {
-  CriticalSectionScoped lock(_acmCritSect);
-  if (_secondaryEncoder.get() == NULL) {
+  CriticalSectionScoped lock(acm_crit_sect_);
+  if (secondary_encoder_.get() == NULL) {
     return;
   }
-  _secondaryEncoder.reset();
+  secondary_encoder_.reset();
   ResetFragmentation(0);
 }
 
 int AudioCodingModuleImpl::SecondarySendCodec(
     CodecInst* secondary_codec) const {
-  CriticalSectionScoped lock(_acmCritSect);
-  if (_secondaryEncoder.get() == NULL) {
+  CriticalSectionScoped lock(acm_crit_sect_);
+  if (secondary_encoder_.get() == NULL) {
     return -1;
   }
-  memcpy(secondary_codec, &_secondarySendCodecInst,
-         sizeof(_secondarySendCodecInst));
+  memcpy(secondary_codec, &secondary_send_codec_inst_,
+         sizeof(secondary_send_codec_inst_));
   return 0;
 }
 
@@ -970,15 +917,15 @@
 WebRtc_Word32 AudioCodingModuleImpl::RegisterSendCodec(
     const CodecInst& send_codec) {
   int mirror_id;
-  int codec_id = IsValidSendCodec(send_codec, true, _id, &mirror_id);
+  int codec_id = IsValidSendCodec(send_codec, true, id_, &mirror_id);
 
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
   // Check for reported errors from function IsValidSendCodec().
   if (codec_id < 0) {
-    if (!_sendCodecRegistered) {
+    if (!send_codec_registered_) {
       // This values has to be NULL if there is no codec registered.
-      _currentSendCodecIdx = -1;
+      current_send_codec_idx_ = -1;
     }
     return -1;
   }
@@ -990,13 +937,13 @@
     // ACMCodecDB::CodecNumber().
     // Check if the payload-type is valid
     if (!ACMCodecDB::ValidPayloadType(send_codec.pltype)) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "Invalid payload-type %d for %s.", send_codec.pltype,
                    send_codec.plname);
       return -1;
     }
     // Set RED payload type.
-    _red_pltype = static_cast<uint8_t>(send_codec.pltype);
+    red_pltype_ = static_cast<uint8_t>(send_codec.pltype);
     return 0;
   }
 
@@ -1006,51 +953,50 @@
     // CNG is registered.
     switch (send_codec.plfreq) {
       case 8000: {
-        _cng_nb_pltype = static_cast<uint8_t>(send_codec.pltype);
+        cng_nb_pltype_ = static_cast<uint8_t>(send_codec.pltype);
         break;
       }
       case 16000: {
-        _cng_wb_pltype = static_cast<uint8_t>(send_codec.pltype);
+        cng_wb_pltype_ = static_cast<uint8_t>(send_codec.pltype);
         break;
       }
       case 32000: {
-        _cng_swb_pltype = static_cast<uint8_t>(send_codec.pltype);
+        cng_swb_pltype_ = static_cast<uint8_t>(send_codec.pltype);
         break;
       }
       case 48000: {
-        _cng_fb_pltype = static_cast<uint8_t>(send_codec.pltype);
+        cng_fb_pltype_ = static_cast<uint8_t>(send_codec.pltype);
         break;
       }
       default: {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "RegisterSendCodec() failed, invalid frequency for CNG "
                      "registration");
         return -1;
       }
     }
-
     return 0;
   }
 
   // Set Stereo, and make sure VAD and DTX is turned off.
   if (send_codec.channels == 2) {
-    _stereoSend = true;
-    if (_vadEnabled || _dtxEnabled) {
-      WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, _id,
+    stereo_send_ = true;
+    if (vad_enabled_ || dtx_enabled_) {
+      WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, id_,
                    "VAD/DTX is turned off, not supported when sending stereo.");
     }
-    _vadEnabled = false;
-    _dtxEnabled = false;
+    vad_enabled_ = false;
+    dtx_enabled_ = false;
   } else {
-    _stereoSend = false;
+    stereo_send_ = false;
   }
 
   // Check if the codec is already registered as send codec.
   bool is_send_codec;
-  if (_sendCodecRegistered) {
+  if (send_codec_registered_) {
     int send_codec_mirror_id;
-    int send_codec_id = ACMCodecDB::CodecNumber(&_sendCodecInst,
-                                              &send_codec_mirror_id);
+    int send_codec_id = ACMCodecDB::CodecNumber(&send_codec_inst_,
+                                                &send_codec_mirror_id);
     assert(send_codec_id >= 0);
     is_send_codec = (send_codec_id == codec_id) ||
         (mirror_id == send_codec_mirror_id);
@@ -1061,55 +1007,54 @@
   // If there is secondary codec registered and the new send codec has a
   // sampling rate different than that of secondary codec, then unregister the
   // secondary codec.
-  if (_secondaryEncoder.get() != NULL &&
-      _secondarySendCodecInst.plfreq != send_codec.plfreq) {
-    _secondaryEncoder.reset();
+  if (secondary_encoder_.get() != NULL &&
+      secondary_send_codec_inst_.plfreq != send_codec.plfreq) {
+    secondary_encoder_.reset();
     ResetFragmentation(0);
   }
 
   // If new codec, or new settings, register.
   if (!is_send_codec) {
-    if (_codecs[mirror_id] == NULL) {
-
-      _codecs[mirror_id] = CreateCodec(send_codec);
-      if (_codecs[mirror_id] == NULL) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    if (codecs_[mirror_id] == NULL) {
+      codecs_[mirror_id] = CreateCodec(send_codec);
+      if (codecs_[mirror_id] == NULL) {
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "Cannot Create the codec");
         return -1;
       }
-      _mirrorCodecIdx[mirror_id] = mirror_id;
+      mirror_codec_idx_[mirror_id] = mirror_id;
     }
 
     if (mirror_id != codec_id) {
-      _codecs[codec_id] = _codecs[mirror_id];
-      _mirrorCodecIdx[codec_id] = mirror_id;
+      codecs_[codec_id] = codecs_[mirror_id];
+      mirror_codec_idx_[codec_id] = mirror_id;
     }
 
-    ACMGenericCodec* codec_ptr = _codecs[codec_id];
+    ACMGenericCodec* codec_ptr = codecs_[codec_id];
     WebRtc_Word16 status;
     WebRtcACMCodecParams codec_params;
 
-    memcpy(&(codec_params.codecInstant), &send_codec, sizeof(CodecInst));
-    codec_params.enableVAD = _vadEnabled;
-    codec_params.enableDTX = _dtxEnabled;
-    codec_params.vadMode = _vadMode;
+    memcpy(&(codec_params.codec_inst), &send_codec, sizeof(CodecInst));
+    codec_params.enable_vad = vad_enabled_;
+    codec_params.enable_dtx = dtx_enabled_;
+    codec_params.vad_mode = vad_mode_;
     // Force initialization.
     status = codec_ptr->InitEncoder(&codec_params, true);
 
     // Check if VAD was turned on, or if error is reported.
     if (status == 1) {
-      _vadEnabled = true;
+      vad_enabled_ = true;
     } else if (status < 0) {
       // Could not initialize the encoder.
 
       // Check if already have a registered codec.
       // Depending on that different messages are logged.
-      if (!_sendCodecRegistered) {
-        _currentSendCodecIdx = -1;
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+      if (!send_codec_registered_) {
+        current_send_codec_idx_ = -1;
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "Cannot Initialize the encoder No Encoder is registered");
       } else {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "Cannot Initialize the encoder, continue encoding with "
                      "the previously registered codec");
       }
@@ -1117,22 +1062,22 @@
     }
 
     // Everything is fine so we can replace the previous codec with this one.
-    if (_sendCodecRegistered) {
+    if (send_codec_registered_) {
       // If we change codec we start fresh with FEC.
       // This is not strictly required by the standard.
-      _isFirstRED = true;
+      is_first_red_ = true;
 
-      if (codec_ptr->SetVAD(_dtxEnabled, _vadEnabled, _vadMode) < 0) {
+      if (codec_ptr->SetVAD(dtx_enabled_, vad_enabled_, vad_mode_) < 0) {
         // SetVAD failed.
-        _vadEnabled = false;
-        _dtxEnabled = false;
+        vad_enabled_ = false;
+        dtx_enabled_ = false;
       }
     }
 
-    _currentSendCodecIdx = codec_id;
-    _sendCodecRegistered = true;
-    memcpy(&_sendCodecInst, &send_codec, sizeof(CodecInst));
-    _previousPayloadType = _sendCodecInst.pltype;
+    current_send_codec_idx_ = codec_id;
+    send_codec_registered_ = true;
+    memcpy(&send_codec_inst_, &send_codec, sizeof(CodecInst));
+    previous_pltype_ = send_codec_inst_.pltype;
     return 0;
   } else {
     // If codec is the same as already registered check if any parameters
@@ -1141,17 +1086,17 @@
     bool force_init = false;
 
     if (mirror_id != codec_id) {
-      _codecs[codec_id] = _codecs[mirror_id];
-      _mirrorCodecIdx[codec_id] = mirror_id;
+      codecs_[codec_id] = codecs_[mirror_id];
+      mirror_codec_idx_[codec_id] = mirror_id;
     }
 
     // Check the payload type.
-    if (send_codec.pltype != _sendCodecInst.pltype) {
+    if (send_codec.pltype != send_codec_inst_.pltype) {
       // At this point check if the given payload type is valid.
       // Record it later when the sampling frequency is changed
       // successfully.
       if (!ACMCodecDB::ValidPayloadType(send_codec.pltype)) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "Out of range payload type");
         return -1;
       }
@@ -1162,56 +1107,57 @@
     // one such a codec is iSAC. Both WB and SWB are encoded and decoded
     // with one iSAC instance. Therefore, we need to update the encoder
     // frequency if required.
-    if (_sendCodecInst.plfreq != send_codec.plfreq) {
+    if (send_codec_inst_.plfreq != send_codec.plfreq) {
       force_init = true;
 
       // If sampling frequency is changed we have to start fresh with RED.
-      _isFirstRED = true;
+      is_first_red_ = true;
     }
 
     // If packet size or number of channels has changed, we need to
     // re-initialize the encoder.
-    if (_sendCodecInst.pacsize != send_codec.pacsize) {
+    if (send_codec_inst_.pacsize != send_codec.pacsize) {
       force_init = true;
     }
-    if (_sendCodecInst.channels != send_codec.channels) {
+    if (send_codec_inst_.channels != send_codec.channels) {
       force_init = true;
     }
 
     if (force_init) {
       WebRtcACMCodecParams codec_params;
 
-      memcpy(&(codec_params.codecInstant), &send_codec, sizeof(CodecInst));
-      codec_params.enableVAD = _vadEnabled;
-      codec_params.enableDTX = _dtxEnabled;
-      codec_params.vadMode = _vadMode;
+      memcpy(&(codec_params.codec_inst), &send_codec, sizeof(CodecInst));
+      codec_params.enable_vad = vad_enabled_;
+      codec_params.enable_dtx = dtx_enabled_;
+      codec_params.vad_mode = vad_mode_;
 
       // Force initialization.
-      if (_codecs[_currentSendCodecIdx]->InitEncoder(&codec_params, true) < 0) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+      if (codecs_[current_send_codec_idx_]->InitEncoder(&codec_params,
+                                                        true) < 0) {
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "Could not change the codec packet-size.");
         return -1;
       }
 
-      _sendCodecInst.plfreq = send_codec.plfreq;
-      _sendCodecInst.pacsize = send_codec.pacsize;
-      _sendCodecInst.channels = send_codec.channels;
+      send_codec_inst_.plfreq = send_codec.plfreq;
+      send_codec_inst_.pacsize = send_codec.pacsize;
+      send_codec_inst_.channels = send_codec.channels;
     }
 
     // If the change of sampling frequency has been successful then
     // we store the payload-type.
-    _sendCodecInst.pltype = send_codec.pltype;
+    send_codec_inst_.pltype = send_codec.pltype;
 
     // Check if a change in Rate is required.
-    if (send_codec.rate != _sendCodecInst.rate) {
-      if (_codecs[codec_id]->SetBitRate(send_codec.rate) < 0) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    if (send_codec.rate != send_codec_inst_.rate) {
+      if (codecs_[codec_id]->SetBitRate(send_codec.rate) < 0) {
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "Could not change the codec rate.");
         return -1;
       }
-      _sendCodecInst.rate = send_codec.rate;
+      send_codec_inst_.rate = send_codec.rate;
     }
-    _previousPayloadType = _sendCodecInst.pltype;
+    previous_pltype_ = send_codec_inst_.pltype;
 
     return 0;
   }
@@ -1220,72 +1166,72 @@
 // Get current send codec.
 WebRtc_Word32 AudioCodingModuleImpl::SendCodec(
     CodecInst& current_codec) const {
-  WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, _id,
+  WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, id_,
                "SendCodec()");
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
-  if (!_sendCodecRegistered) {
-    WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, _id,
+  if (!send_codec_registered_) {
+    WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, id_,
                  "SendCodec Failed, no codec is registered");
 
     return -1;
   }
   WebRtcACMCodecParams encoder_param;
-  _codecs[_currentSendCodecIdx]->EncoderParams(&encoder_param);
-  encoder_param.codecInstant.pltype = _sendCodecInst.pltype;
-  memcpy(&current_codec, &(encoder_param.codecInstant), sizeof(CodecInst));
+  codecs_[current_send_codec_idx_]->EncoderParams(&encoder_param);
+  encoder_param.codec_inst.pltype = send_codec_inst_.pltype;
+  memcpy(&current_codec, &(encoder_param.codec_inst), sizeof(CodecInst));
 
   return 0;
 }
 
 // Get current send frequency.
 WebRtc_Word32 AudioCodingModuleImpl::SendFrequency() const {
-  WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, _id,
+  WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, id_,
                "SendFrequency()");
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
-  if (!_sendCodecRegistered) {
-    WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, _id,
+  if (!send_codec_registered_) {
+    WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, id_,
                  "SendFrequency Failed, no codec is registered");
 
     return -1;
   }
 
-  return _sendCodecInst.plfreq;
+  return send_codec_inst_.plfreq;
 }
 
 // Get encode bitrate.
 // Adaptive rate codecs return their current encode target rate, while other
 // codecs return there longterm avarage or their fixed rate.
 WebRtc_Word32 AudioCodingModuleImpl::SendBitrate() const {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
-  if (!_sendCodecRegistered) {
-    WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, _id,
+  if (!send_codec_registered_) {
+    WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, id_,
                  "SendBitrate Failed, no codec is registered");
 
     return -1;
   }
 
   WebRtcACMCodecParams encoder_param;
-  _codecs[_currentSendCodecIdx]->EncoderParams(&encoder_param);
+  codecs_[current_send_codec_idx_]->EncoderParams(&encoder_param);
 
-  return encoder_param.codecInstant.rate;
+  return encoder_param.codec_inst.rate;
 }
 
 // Set available bandwidth, inform the encoder about the estimated bandwidth
 // received from the remote party.
 WebRtc_Word32 AudioCodingModuleImpl::SetReceivedEstimatedBandwidth(
     const WebRtc_Word32 bw) {
-  return _codecs[_currentSendCodecIdx]->SetEstimatedBandwidth(bw);
+  return codecs_[current_send_codec_idx_]->SetEstimatedBandwidth(bw);
 }
 
 // Register a transport callback which will be called to deliver
 // the encoded buffers.
 WebRtc_Word32 AudioCodingModuleImpl::RegisterTransportCallback(
     AudioPacketizationCallback* transport) {
-  CriticalSectionScoped lock(_callbackCritSect);
-  _packetizationCallback = transport;
+  CriticalSectionScoped lock(callback_crit_sect_);
+  packetization_callback_ = transport;
   return 0;
 }
 
@@ -1303,35 +1249,35 @@
 
   // Enter the critical section for callback.
   {
-    CriticalSectionScoped lock(_callbackCritSect);
-    _dtmfCallback = incoming_message;
+    CriticalSectionScoped lock(callback_crit_sect_);
+    dtmf_callback_ = incoming_message;
   }
   // Enter the ACM critical section to set up the DTMF class.
   {
-    CriticalSectionScoped lock(_acmCritSect);
+    CriticalSectionScoped lock(acm_crit_sect_);
     // Check if the call is to disable or enable the callback.
     if (incoming_message == NULL) {
       // Callback is disabled, delete DTMF-detector class.
-      if (_dtmfDetector != NULL) {
-        delete _dtmfDetector;
-        _dtmfDetector = NULL;
+      if (dtmf_detector_ != NULL) {
+        delete dtmf_detector_;
+        dtmf_detector_ = NULL;
       }
       status = 0;
     } else {
       status = 0;
-      if (_dtmfDetector == NULL) {
-        _dtmfDetector = new (ACMDTMFDetection);
-        if (_dtmfDetector == NULL) {
+      if (dtmf_detector_ == NULL) {
+        dtmf_detector_ = new ACMDTMFDetection;
+        if (dtmf_detector_ == NULL) {
           status = -1;
         }
       }
       if (status >= 0) {
-        status = _dtmfDetector->Enable(cpt);
+        status = dtmf_detector_->Enable(cpt);
         if (status < 0) {
           // Failed to initialize if DTMF-detection was not enabled before,
           // delete the class, and set the callback to NULL and return -1.
-          delete _dtmfDetector;
-          _dtmfDetector = NULL;
+          delete dtmf_detector_;
+          dtmf_detector_ = NULL;
         }
       }
     }
@@ -1339,8 +1285,8 @@
   // Check if we failed in setting up the DTMF-detector class.
   if ((status < 0)) {
     // We failed, we cannot have the callback.
-    CriticalSectionScoped lock(_callbackCritSect);
-    _dtmfCallback = NULL;
+    CriticalSectionScoped lock(callback_crit_sect_);
+    dtmf_callback_ = NULL;
   }
 
   return status;
@@ -1350,11 +1296,11 @@
 // Add 10MS of raw (PCM) audio data to the encoder.
 WebRtc_Word32 AudioCodingModuleImpl::Add10MsData(
     const AudioFrame& audio_frame) {
-
   if (audio_frame.samples_per_channel_ <= 0) {
     assert(false);
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-                 "Cannot Add 10 ms audio, payload length is negative or zero");
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                 "Cannot Add 10 ms audio, payload length is negative or "
+                 "zero");
     return -1;
   }
 
@@ -1364,7 +1310,7 @@
       && (audio_frame.sample_rate_hz_ != 32000)
       && (audio_frame.sample_rate_hz_ != 48000)) {
     assert(false);
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "Cannot Add 10 ms audio, input frequency not valid");
     return -1;
   }
@@ -1372,37 +1318,38 @@
   // If the length and frequency matches. We currently just support raw PCM.
   if ((audio_frame.sample_rate_hz_ / 100)
       != audio_frame.samples_per_channel_) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "Cannot Add 10 ms audio, input frequency and length doesn't"
                  " match");
     return -1;
   }
 
   if (audio_frame.num_channels_ != 1 && audio_frame.num_channels_ != 2) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "Cannot Add 10 ms audio, invalid number of channels.");
     return -1;
   }
 
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
   // Do we have a codec registered?
   if (!HaveValidEncoder("Add10MsData")) {
     return -1;
   }
 
   const AudioFrame* ptr_frame;
-  // Perform a resampling, also down-mix if it is required and can be performed
-  // before resampling (a down mix prior to resampling will take place if both
-  // primary and secondary encoders are mono and input is in stereo).
+  // Perform a resampling, also down-mix if it is required and can be
+  // performed before resampling (a down mix prior to resampling will take
+  // place if both primary and secondary encoders are mono and input is in
+  // stereo).
   if (PreprocessToAddData(audio_frame, &ptr_frame) < 0) {
     return -1;
   }
 
   // Check whether we need an up-mix or down-mix?
-  bool remix = ptr_frame->num_channels_ != _sendCodecInst.channels;
-  if (_secondaryEncoder.get() != NULL) {
+  bool remix = ptr_frame->num_channels_ != send_codec_inst_.channels;
+  if (secondary_encoder_.get() != NULL) {
     remix = remix ||
-        (ptr_frame->num_channels_ != _secondarySendCodecInst.channels);
+        (ptr_frame->num_channels_ != secondary_send_codec_inst_.channels);
   }
 
   // If a re-mix is required (up or down), this buffer will store re-mixed
@@ -1423,23 +1370,23 @@
   const int16_t* ptr_audio = ptr_frame->data_;
 
   // For pushing data to primary, point the |ptr_audio| to correct buffer.
-  if (_sendCodecInst.channels != ptr_frame->num_channels_)
-    ptr_audio = buffer;;
+  if (send_codec_inst_.channels != ptr_frame->num_channels_)
+    ptr_audio = buffer;
 
-  if (_codecs[_currentSendCodecIdx]->Add10MsData(
-          ptr_frame->timestamp_, ptr_audio, ptr_frame->samples_per_channel_,
-          _sendCodecInst.channels) < 0)
+  if (codecs_[current_send_codec_idx_]->Add10MsData(
+      ptr_frame->timestamp_, ptr_audio, ptr_frame->samples_per_channel_,
+      send_codec_inst_.channels) < 0)
     return -1;
 
-  if (_secondaryEncoder.get() != NULL) {
+  if (secondary_encoder_.get() != NULL) {
     // For pushing data to secondary, point the |ptr_audio| to correct buffer.
     ptr_audio = ptr_frame->data_;
-    if (_secondarySendCodecInst.channels != ptr_frame->num_channels_)
+    if (secondary_send_codec_inst_.channels != ptr_frame->num_channels_)
       ptr_audio = buffer;
 
-    if (_secondaryEncoder->Add10MsData(ptr_frame->timestamp_, ptr_audio,
-                                       ptr_frame->samples_per_channel_,
-                                       _secondarySendCodecInst.channels) < 0)
+    if (secondary_encoder_->Add10MsData(
+        ptr_frame->timestamp_, ptr_audio, ptr_frame->samples_per_channel_,
+        secondary_send_codec_inst_.channels) < 0)
       return -1;
   }
 
@@ -1453,38 +1400,38 @@
 // is required, |*ptr_out| points to |in_frame|.
 int AudioCodingModuleImpl::PreprocessToAddData(const AudioFrame& in_frame,
                                                const AudioFrame** ptr_out) {
-   // Primary and secondary (if exists) should have the same sampling rate.
-  assert((_secondaryEncoder.get() != NULL) ?
-      _secondarySendCodecInst.plfreq == _sendCodecInst.plfreq :
-      true);
+  // Primary and secondary (if exists) should have the same sampling rate.
+  assert((secondary_encoder_.get() != NULL) ?
+      secondary_send_codec_inst_.plfreq == send_codec_inst_.plfreq : true);
 
   bool resample = ((WebRtc_Word32) in_frame.sample_rate_hz_
-      != _sendCodecInst.plfreq);
+      != send_codec_inst_.plfreq);
 
   // This variable is true if primary codec and secondary codec (if exists)
   // are both mono and input is stereo.
   bool down_mix;
-  if (_secondaryEncoder.get() != NULL) {
+  if (secondary_encoder_.get() != NULL) {
     down_mix = (in_frame.num_channels_ == 2) &&
-        (_sendCodecInst.channels == 1) &&
-        (_secondarySendCodecInst.channels == 1);
+        (send_codec_inst_.channels == 1) &&
+        (secondary_send_codec_inst_.channels == 1);
   } else {
-    down_mix = (in_frame.num_channels_ == 2) && (_sendCodecInst.channels == 1);
+    down_mix = (in_frame.num_channels_ == 2) &&
+        (send_codec_inst_.channels == 1);
   }
 
   if (!down_mix && !resample) {
     // No pre-processing is required.
-    _lastInTimestamp = in_frame.timestamp_;
-    _lastTimestamp = in_frame.timestamp_;
+    last_in_timestamp_ = in_frame.timestamp_;
+    last_timestamp_ = in_frame.timestamp_;
     *ptr_out = &in_frame;
     return 0;
   }
 
-  *ptr_out = &_preprocess_frame;
-  _preprocess_frame.num_channels_ = in_frame.num_channels_;
+  *ptr_out = &preprocess_frame_;
+  preprocess_frame_.num_channels_ = in_frame.num_channels_;
   int16_t audio[WEBRTC_10MS_PCM_AUDIO];
   const int16_t* src_ptr_audio = in_frame.data_;
-  int16_t* dest_ptr_audio = _preprocess_frame.data_;
+  int16_t* dest_ptr_audio = preprocess_frame_.data_;
   if (down_mix) {
     // If a resampling is required the output of a down-mix is written into a
     // local buffer, otherwise, it will be written to the output frame.
@@ -1492,46 +1439,46 @@
       dest_ptr_audio = audio;
     if (DownMix(in_frame, WEBRTC_10MS_PCM_AUDIO, dest_ptr_audio) < 0)
       return -1;
-    _preprocess_frame.num_channels_ = 1;
+    preprocess_frame_.num_channels_ = 1;
     // Set the input of the resampler is the down-mixed signal.
     src_ptr_audio = audio;
   }
 
-  _preprocess_frame.timestamp_ = in_frame.timestamp_;
-  _preprocess_frame.samples_per_channel_ = in_frame.samples_per_channel_;
-  _preprocess_frame.sample_rate_hz_ = in_frame.sample_rate_hz_;
+  preprocess_frame_.timestamp_ = in_frame.timestamp_;
+  preprocess_frame_.samples_per_channel_ = in_frame.samples_per_channel_;
+  preprocess_frame_.sample_rate_hz_ = in_frame.sample_rate_hz_;
   // If it is required, we have to do a resampling.
   if (resample) {
     // The result of the resampler is written to output frame.
-    dest_ptr_audio = _preprocess_frame.data_;
+    dest_ptr_audio = preprocess_frame_.data_;
 
     uint32_t timestamp_diff;
 
     // Calculate the timestamp of this frame.
-    if (_lastInTimestamp > in_frame.timestamp_) {
+    if (last_in_timestamp_ > in_frame.timestamp_) {
       // A wrap around has happened.
-      timestamp_diff = ((WebRtc_UWord32) 0xFFFFFFFF - _lastInTimestamp)
-          + in_frame.timestamp_;
+      timestamp_diff = ((WebRtc_UWord32) 0xFFFFFFFF - last_in_timestamp_)
+                                                 + in_frame.timestamp_;
     } else {
-      timestamp_diff = in_frame.timestamp_ - _lastInTimestamp;
+      timestamp_diff = in_frame.timestamp_ - last_in_timestamp_;
     }
-    _preprocess_frame.timestamp_ = _lastTimestamp +
-        (WebRtc_UWord32)(timestamp_diff * ((double) _sendCodecInst.plfreq /
-            (double) in_frame.sample_rate_hz_));
+    preprocess_frame_.timestamp_ = last_timestamp_ +
+        (WebRtc_UWord32)(timestamp_diff * ((double) send_codec_inst_.plfreq /
+            static_cast<double>(in_frame.sample_rate_hz_)));
 
-    _preprocess_frame.samples_per_channel_ = _inputResampler.Resample10Msec(
+    preprocess_frame_.samples_per_channel_ = input_resampler_.Resample10Msec(
         src_ptr_audio, in_frame.sample_rate_hz_, dest_ptr_audio,
-        _sendCodecInst.plfreq, _preprocess_frame.num_channels_);
+        send_codec_inst_.plfreq, preprocess_frame_.num_channels_);
 
-    if (_preprocess_frame.samples_per_channel_ < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    if (preprocess_frame_.samples_per_channel_ < 0) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "Cannot add 10 ms audio, resmapling failed");
       return -1;
     }
-    _preprocess_frame.sample_rate_hz_ = _sendCodecInst.plfreq;
+    preprocess_frame_.sample_rate_hz_ = send_codec_inst_.plfreq;
   }
-  _lastInTimestamp = in_frame.timestamp_;
-  _lastTimestamp = _preprocess_frame.timestamp_;
+  last_in_timestamp_ = in_frame.timestamp_;
+  last_timestamp_ = preprocess_frame_.timestamp_;
 
   return 0;
 }
@@ -1541,8 +1488,8 @@
 //
 
 bool AudioCodingModuleImpl::FECStatus() const {
-  CriticalSectionScoped lock(_acmCritSect);
-  return _fecEnabled;
+  CriticalSectionScoped lock(acm_crit_sect_);
+  return fec_enabled_;
 }
 
 // Configure FEC status i.e on/off.
@@ -1550,25 +1497,25 @@
 AudioCodingModuleImpl::SetFECStatus(
 #ifdef WEBRTC_CODEC_RED
     const bool enable_fec) {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
-  if (_fecEnabled != enable_fec) {
+  if (fec_enabled_ != enable_fec) {
     // Reset the RED buffer.
-    memset(_redBuffer, 0, MAX_PAYLOAD_SIZE_BYTE);
+    memset(red_buffer_, 0, MAX_PAYLOAD_SIZE_BYTE);
 
     // Reset fragmentation buffers.
     ResetFragmentation(kNumFecFragmentationVectors);
-    // Set _fecEnabled.
-    _fecEnabled = enable_fec;
+    // Set fec_enabled_.
+    fec_enabled_ = enable_fec;
   }
-  _isFirstRED = true;  // Make sure we restart FEC.
+  is_first_red_ = true;  // Make sure we restart FEC.
   return 0;
 #else
     const bool /* enable_fec */) {
-  _fecEnabled = false;
-  WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, _id,
-               "  WEBRTC_CODEC_RED is undefined => _fecEnabled = %d",
-               _fecEnabled);
+  fec_enabled_ = false;
+  WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, id_,
+               "  WEBRTC_CODEC_RED is undefined => fec_enabled_ = %d",
+               fec_enabled_);
   return -1;
 #endif
 }
@@ -1579,7 +1526,7 @@
 WebRtc_Word32 AudioCodingModuleImpl::SetVAD(const bool enable_dtx,
                                             const bool enable_vad,
                                             const ACMVADMode mode) {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
   return SetVADSafe(enable_dtx, enable_vad, mode);
 }
 
@@ -1589,7 +1536,7 @@
   // Sanity check of the mode.
   if ((mode != VADNormal) && (mode != VADLowBitrate)
       && (mode != VADAggr) && (mode != VADVeryAggr)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "Invalid VAD Mode %d, no change is made to VAD/DTX status",
                  (int) mode);
     return -1;
@@ -1597,47 +1544,47 @@
 
   // Check that the send codec is mono. We don't support VAD/DTX for stereo
   // sending.
-  if ((enable_dtx || enable_vad) && _stereoSend) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if ((enable_dtx || enable_vad) && stereo_send_) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "VAD/DTX not supported for stereo sending");
     return -1;
   }
 
   // We don't support VAD/DTX when dual-streaming is enabled, i.e.
   // secondary-encoder is registered.
-  if ((enable_dtx || enable_vad) && _secondaryEncoder.get() != NULL) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if ((enable_dtx || enable_vad) && secondary_encoder_.get() != NULL) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "VAD/DTX not supported when dual-streaming is enabled.");
     return -1;
   }
 
   // If a send codec is registered, set VAD/DTX for the codec.
   if (HaveValidEncoder("SetVAD")) {
-    WebRtc_Word16 status = _codecs[_currentSendCodecIdx]->SetVAD(enable_dtx,
-                                                                 enable_vad,
-                                                                 mode);
+    WebRtc_Word16 status = codecs_[current_send_codec_idx_]->SetVAD(enable_dtx,
+                                                                    enable_vad,
+                                                                    mode);
     if (status == 1) {
       // Vad was enabled.
-      _vadEnabled = true;
-      _dtxEnabled = enable_dtx;
-      _vadMode = mode;
+      vad_enabled_ = true;
+      dtx_enabled_ = enable_dtx;
+      vad_mode_ = mode;
 
       return 0;
     } else if (status < 0) {
       // SetVAD failed.
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "SetVAD failed");
 
-      _vadEnabled = false;
-      _dtxEnabled = false;
+      vad_enabled_ = false;
+      dtx_enabled_ = false;
 
       return -1;
     }
   }
 
-  _vadEnabled = enable_vad;
-  _dtxEnabled = enable_dtx;
-  _vadMode = mode;
+  vad_enabled_ = enable_vad;
+  dtx_enabled_ = enable_dtx;
+  vad_mode_ = mode;
 
   return 0;
 }
@@ -1645,11 +1592,11 @@
 // Get VAD/DTX settings.
 WebRtc_Word32 AudioCodingModuleImpl::VAD(bool& dtx_enabled, bool& vad_enabled,
                                          ACMVADMode& mode) const {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
-  dtx_enabled = _dtxEnabled;
-  vad_enabled = _vadEnabled;
-  mode = _vadMode;
+  dtx_enabled = dtx_enabled_;
+  vad_enabled = vad_enabled_;
+  mode = vad_mode_;
 
   return 0;
 }
@@ -1659,7 +1606,7 @@
 //
 
 WebRtc_Word32 AudioCodingModuleImpl::InitializeReceiver() {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
   return InitializeReceiverSafe();
 }
 
@@ -1668,25 +1615,25 @@
   // If the receiver is already initialized then we want to destroy any
   // existing decoders. After a call to this function, we should have a clean
   // start-up.
-  if (_receiverInitialized) {
+  if (receiver_initialized_) {
     for (int i = 0; i < ACMCodecDB::kNumCodecs; i++) {
       if (UnregisterReceiveCodecSafe(i) < 0) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "InitializeReceiver() failed, Could not unregister codec");
         return -1;
       }
     }
   }
-  if (_netEq.Init() != 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if (neteq_.Init() != 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "InitializeReceiver() failed, Could not initialize NetEQ");
     return -1;
   }
-  _netEq.SetUniqueId(_id);
-  if (_netEq.AllocatePacketBuffer(ACMCodecDB::NetEQDecoders(),
-                                  ACMCodecDB::kNumCodecs) != 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-                 "NetEQ cannot allocatePacket Buffer");
+  neteq_.set_id(id_);
+  if (neteq_.AllocatePacketBuffer(ACMCodecDB::NetEQDecoders(),
+                                   ACMCodecDB::kNumCodecs) != 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                 "NetEQ cannot allocate_packet Buffer");
     return -1;
   }
 
@@ -1694,70 +1641,70 @@
   for (int i = 0; i < ACMCodecDB::kNumCodecs; i++) {
     if (IsCodecRED(i) || IsCodecCN(i)) {
       if (RegisterRecCodecMSSafe(ACMCodecDB::database_[i], i, i,
-                                 ACMNetEQ::masterJB) < 0) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+                                 ACMNetEQ::kMasterJb) < 0) {
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "Cannot register master codec.");
         return -1;
       }
-      _registeredPlTypes[i] = ACMCodecDB::database_[i].pltype;
+      registered_pltypes_[i] = ACMCodecDB::database_[i].pltype;
     }
   }
 
-  _receiverInitialized = true;
+  receiver_initialized_ = true;
   return 0;
 }
 
 // Reset the decoder state.
 WebRtc_Word32 AudioCodingModuleImpl::ResetDecoder() {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
   for (int id = 0; id < ACMCodecDB::kMaxNumCodecs; id++) {
-    if ((_codecs[id] != NULL) && (_registeredPlTypes[id] != -1)) {
-      if (_codecs[id]->ResetDecoder(_registeredPlTypes[id]) < 0) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    if ((codecs_[id] != NULL) && (registered_pltypes_[id] != -1)) {
+      if (codecs_[id]->ResetDecoder(registered_pltypes_[id]) < 0) {
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "ResetDecoder failed:");
         return -1;
       }
     }
   }
-  return _netEq.FlushBuffers();
+  return neteq_.FlushBuffers();
 }
 
 // Get current receive frequency.
 WebRtc_Word32 AudioCodingModuleImpl::ReceiveFrequency() const {
-  WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, _id,
+  WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, id_,
                "ReceiveFrequency()");
   WebRtcACMCodecParams codec_params;
 
-  CriticalSectionScoped lock(_acmCritSect);
-  if (DecoderParamByPlType(_lastRecvAudioCodecPlType, codec_params) < 0) {
-    return _netEq.CurrentSampFreqHz();
-  } else if (codec_params.codecInstant.plfreq == 48000) {
+  CriticalSectionScoped lock(acm_crit_sect_);
+  if (DecoderParamByPlType(last_recv_audio_codec_pltype_, codec_params) < 0) {
+    return neteq_.CurrentSampFreqHz();
+  } else if (codec_params.codec_inst.plfreq == 48000) {
     // TODO(tlegrand): Remove this option when we have full 48 kHz support.
     return 32000;
   } else {
-    return codec_params.codecInstant.plfreq;
+    return codec_params.codec_inst.plfreq;
   }
 }
 
 // Get current playout frequency.
 WebRtc_Word32 AudioCodingModuleImpl::PlayoutFrequency() const {
-  WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, _id,
+  WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, id_,
                "PlayoutFrequency()");
 
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
-  return _netEq.CurrentSampFreqHz();
+  return neteq_.CurrentSampFreqHz();
 }
 
 // Register possible receive codecs, can be called multiple times,
 // for codecs, CNG (NB, WB and SWB), DTMF, RED.
 WebRtc_Word32 AudioCodingModuleImpl::RegisterReceiveCodec(
     const CodecInst& receive_codec) {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
   if (receive_codec.channels > 2) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "More than 2 audio channel is not supported.");
     return -1;
   }
@@ -1766,21 +1713,21 @@
   int codec_id = ACMCodecDB::ReceiverCodecNumber(&receive_codec, &mirror_id);
 
   if (codec_id < 0 || codec_id >= ACMCodecDB::kNumCodecs) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "Wrong codec params to be registered as receive codec");
     return -1;
   }
   // Check if the payload-type is valid.
   if (!ACMCodecDB::ValidPayloadType(receive_codec.pltype)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "Invalid payload-type %d for %s.", receive_codec.pltype,
                  receive_codec.plname);
     return -1;
   }
 
-  if (!_receiverInitialized) {
+  if (!receiver_initialized_) {
     if (InitializeReceiverSafe() < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "Cannot initialize reciver, so failed registering a codec.");
       return -1;
     }
@@ -1788,61 +1735,61 @@
 
   // If codec already registered, unregister. Except for CN where we only
   // unregister if payload type is changing.
-  if ((_registeredPlTypes[codec_id] == receive_codec.pltype)
+  if ((registered_pltypes_[codec_id] == receive_codec.pltype)
       && IsCodecCN(&receive_codec)) {
     // Codec already registered as receiver with this payload type. Nothing
     // to be done.
     return 0;
-  } else if (_registeredPlTypes[codec_id] != -1) {
+  } else if (registered_pltypes_[codec_id] != -1) {
     if (UnregisterReceiveCodecSafe(codec_id) < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "Cannot register master codec.");
       return -1;
     }
   }
 
   if (RegisterRecCodecMSSafe(receive_codec, codec_id, mirror_id,
-                             ACMNetEQ::masterJB) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+                             ACMNetEQ::kMasterJb) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "Cannot register master codec.");
     return -1;
   }
 
   // TODO(andrew): Refactor how the slave is initialized. Can we instead
   // always start up a slave and pre-register CN and RED? We should be able
-  // to get rid of _stereoReceiveRegistered.
+  // to get rid of stereo_receive_registered_.
   // http://code.google.com/p/webrtc/issues/detail?id=453
 
   // Register stereo codecs with the slave, or, if we've had already seen a
   // stereo codec, register CN or RED as a special case.
   if (receive_codec.channels == 2 ||
-      (_stereoReceiveRegistered && (IsCodecCN(&receive_codec) ||
+      (stereo_receive_registered_ && (IsCodecCN(&receive_codec) ||
           IsCodecRED(&receive_codec)))) {
     // TODO(andrew): refactor this block to combine with InitStereoSlave().
 
-    if (!_stereoReceiveRegistered) {
+    if (!stereo_receive_registered_) {
       // This is the first time a stereo codec has been registered. Make
       // some stereo preparations.
 
       // Add a stereo slave.
-      assert(_netEq.NumSlaves() == 0);
-      if (_netEq.AddSlave(ACMCodecDB::NetEQDecoders(),
-                          ACMCodecDB::kNumCodecs) < 0) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+      assert(neteq_.num_slaves() == 0);
+      if (neteq_.AddSlave(ACMCodecDB::NetEQDecoders(),
+                           ACMCodecDB::kNumCodecs) < 0) {
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "Cannot add slave jitter buffer to NetEQ.");
         return -1;
       }
 
       // Register any existing CN or RED codecs with the slave and as stereo.
       for (int i = 0; i < ACMCodecDB::kNumCodecs; i++) {
-        if (_registeredPlTypes[i] != -1 && (IsCodecRED(i) || IsCodecCN(i))) {
-          _stereoReceive[i] = true;
+        if (registered_pltypes_[i] != -1 && (IsCodecRED(i) || IsCodecCN(i))) {
+          stereo_receive_[i] = true;
 
           CodecInst codec;
           memcpy(&codec, &ACMCodecDB::database_[i], sizeof(CodecInst));
-          codec.pltype = _registeredPlTypes[i];
-          if (RegisterRecCodecMSSafe(codec, i, i, ACMNetEQ::slaveJB) < 0) {
-            WEBRTC_TRACE(kTraceError, kTraceAudioCoding, _id,
+          codec.pltype = registered_pltypes_[i];
+          if (RegisterRecCodecMSSafe(codec, i, i, ACMNetEQ::kSlaveJb) < 0) {
+            WEBRTC_TRACE(kTraceError, kTraceAudioCoding, id_,
                          "Cannot register slave codec.");
             return -1;
           }
@@ -1851,65 +1798,65 @@
     }
 
     if (RegisterRecCodecMSSafe(receive_codec, codec_id, mirror_id,
-                               ACMNetEQ::slaveJB) < 0) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+                               ACMNetEQ::kSlaveJb) < 0) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "Cannot register slave codec.");
       return -1;
     }
 
-    if (!_stereoReceive[codec_id]
-        && (_lastRecvAudioCodecPlType == receive_codec.pltype)) {
+    if (!stereo_receive_[codec_id] &&
+        (last_recv_audio_codec_pltype_ == receive_codec.pltype)) {
       // The last received payload type is the same as the one we are
       // registering. Expected number of channels to receive is one (mono),
       // but we are now registering the receiving codec as stereo (number of
       // channels is 2).
-      // Set |_lastRecvAudioCodedPlType| to invalid value to trigger a flush in
-      // NetEq, and a reset of expected number of channels next time a packet is
-      // received in AudioCodingModuleImpl::IncomingPacket().
-      _lastRecvAudioCodecPlType = -1;
+      // Set |last_recv_audio_coded_pltype_| to invalid value to trigger a
+      // flush in NetEq, and a reset of expected number of channels next time a
+      // packet is received in AudioCodingModuleImpl::IncomingPacket().
+      last_recv_audio_codec_pltype_ = -1;
     }
 
-    _stereoReceive[codec_id] = true;
-    _stereoReceiveRegistered = true;
+    stereo_receive_[codec_id] = true;
+    stereo_receive_registered_ = true;
   } else {
-    if (_lastRecvAudioCodecPlType == receive_codec.pltype &&
-        _expected_channels == 2) {
+    if (last_recv_audio_codec_pltype_ == receive_codec.pltype &&
+        expected_channels_ == 2) {
       // The last received payload type is the same as the one we are
       // registering. Expected number of channels to receive is two (stereo),
       // but we are now registering the receiving codec as mono (number of
       // channels is 1).
-      // Set |_lastRecvAudioCodedPlType| to invalid value to trigger a flush in
-      // NetEq, and a reset of expected number of channels next time a packet is
-      // received in AudioCodingModuleImpl::IncomingPacket().
-      _lastRecvAudioCodecPlType = -1;
+      // Set |last_recv_audio_coded_pl_type_| to invalid value to trigger a
+      // flush in NetEq, and a reset of expected number of channels next time a
+      // packet is received in AudioCodingModuleImpl::IncomingPacket().
+      last_recv_audio_codec_pltype_ = -1;
     }
-    _stereoReceive[codec_id] = false;
+    stereo_receive_[codec_id] = false;
   }
 
-  _registeredPlTypes[codec_id] = receive_codec.pltype;
+  registered_pltypes_[codec_id] = receive_codec.pltype;
 
   if (IsCodecRED(&receive_codec)) {
-    _receiveREDPayloadType = receive_codec.pltype;
+    receive_red_pltype_ = receive_codec.pltype;
   }
   return 0;
 }
 
 WebRtc_Word32 AudioCodingModuleImpl::RegisterRecCodecMSSafe(
     const CodecInst& receive_codec, WebRtc_Word16 codec_id,
-    WebRtc_Word16 mirror_id, ACMNetEQ::JB jitter_buffer) {
+    WebRtc_Word16 mirror_id, ACMNetEQ::JitterBuffer jitter_buffer) {
   ACMGenericCodec** codecs;
-  if (jitter_buffer == ACMNetEQ::masterJB) {
-    codecs = &_codecs[0];
-  } else if (jitter_buffer == ACMNetEQ::slaveJB) {
-    codecs = &_slaveCodecs[0];
-    if (_codecs[codec_id]->IsTrueStereoCodec()) {
+  if (jitter_buffer == ACMNetEQ::kMasterJb) {
+    codecs = &codecs_[0];
+  } else if (jitter_buffer == ACMNetEQ::kSlaveJb) {
+    codecs = &slave_codecs_[0];
+    if (codecs_[codec_id]->IsTrueStereoCodec()) {
       // True stereo codecs need to use the same codec memory
       // for both master and slave.
-      _slaveCodecs[mirror_id] = _codecs[mirror_id];
-      _mirrorCodecIdx[mirror_id] = mirror_id;
+      slave_codecs_[mirror_id] = codecs_[mirror_id];
+      mirror_codec_idx_[mirror_id] = mirror_id;
     }
   } else {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "RegisterReceiveCodecMSSafe failed, jitter_buffer is neither "
                  "master or slave ");
     return -1;
@@ -1918,25 +1865,25 @@
   if (codecs[mirror_id] == NULL) {
     codecs[mirror_id] = CreateCodec(receive_codec);
     if (codecs[mirror_id] == NULL) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                    "Cannot create codec to register as receive codec");
       return -1;
     }
-    _mirrorCodecIdx[mirror_id] = mirror_id;
+    mirror_codec_idx_[mirror_id] = mirror_id;
   }
   if (mirror_id != codec_id) {
     codecs[codec_id] = codecs[mirror_id];
-    _mirrorCodecIdx[codec_id] = mirror_id;
+    mirror_codec_idx_[codec_id] = mirror_id;
   }
 
-  codecs[codec_id]->SetIsMaster(jitter_buffer == ACMNetEQ::masterJB);
+  codecs[codec_id]->SetIsMaster(jitter_buffer == ACMNetEQ::kMasterJb);
 
   WebRtc_Word16 status = 0;
   WebRtcACMCodecParams codec_params;
-  memcpy(&(codec_params.codecInstant), &receive_codec, sizeof(CodecInst));
-  codec_params.enableVAD = false;
-  codec_params.enableDTX = false;
-  codec_params.vadMode = VADNormal;
+  memcpy(&(codec_params.codec_inst), &receive_codec, sizeof(CodecInst));
+  codec_params.enable_vad = false;
+  codec_params.enable_dtx = false;
+  codec_params.vad_mode = VADNormal;
   if (!codecs[codec_id]->DecoderInitialized()) {
     // Force initialization.
     status = codecs[codec_id]->InitDecoder(&codec_params, true);
@@ -1944,7 +1891,7 @@
       // Could not initialize the decoder, we don't want to
       // continue if we could not initialize properly.
       WEBRTC_TRACE(
-          webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+          webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
           "could not initialize the receive codec, codec not registered");
 
       return -1;
@@ -1955,10 +1902,10 @@
     codecs[codec_id]->SaveDecoderParam(&codec_params);
   }
 
-  if (codecs[codec_id]->RegisterInNetEq(&_netEq, receive_codec) != 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if (codecs[codec_id]->RegisterInNetEq(&neteq_, receive_codec) != 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "Receive codec could not be registered in NetEQ");
-      return -1;
+    return -1;
   }
   // Guarantee that the same payload-type that is
   // registered in NetEQ is stored in the codec.
@@ -1970,15 +1917,16 @@
 // Get current received codec.
 WebRtc_Word32 AudioCodingModuleImpl::ReceiveCodec(
     CodecInst& current_codec) const {
-  WebRtcACMCodecParams decoderParam;
-  CriticalSectionScoped lock(_acmCritSect);
+  WebRtcACMCodecParams decoder_param;
+  CriticalSectionScoped lock(acm_crit_sect_);
 
   for (int id = 0; id < ACMCodecDB::kMaxNumCodecs; id++) {
-    if (_codecs[id] != NULL) {
-      if (_codecs[id]->DecoderInitialized()) {
-        if (_codecs[id]->DecoderParams(&decoderParam,
-                                       _lastRecvAudioCodecPlType)) {
-          memcpy(&current_codec, &decoderParam.codecInstant, sizeof(CodecInst));
+    if (codecs_[id] != NULL) {
+      if (codecs_[id]->DecoderInitialized()) {
+        if (codecs_[id]->DecoderParams(&decoder_param,
+                                       last_recv_audio_codec_pltype_)) {
+          memcpy(&current_codec, &decoder_param.codec_inst,
+                 sizeof(CodecInst));
           return 0;
         }
       }
@@ -2001,39 +1949,22 @@
   memcpy(&rtp_header, &rtp_info, sizeof(WebRtcRTPHeader));
 
   if (payload_length < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "IncomingPacket() Error, payload-length cannot be negative");
     return -1;
   }
   {
     // Store the payload Type. This will be used to retrieve "received codec"
     // and "received frequency."
-    CriticalSectionScoped lock(_acmCritSect);
-#ifdef ACM_QA_TEST
-    if (_incomingPL != NULL) {
-      if (fwrite(&rtp_info.header.timestamp, sizeof(WebRtc_UWord32),
-                 1, _incomingPL) != 1) {
-        return -1;
-      }
-      if (fwrite(&rtp_info.header.payloadType, sizeof(WebRtc_UWord8),
-                 1, _incomingPL) != 1) {
-        return -1;
-      }
-      if (fwrite(&payload_length, sizeof(WebRtc_Word16),
-                 1, _incomingPL) != 1) {
-        return -1;
-      }
-    }
-#endif
-
-    WebRtc_UWord8 myPayloadType;
+    CriticalSectionScoped lock(acm_crit_sect_);
+    WebRtc_UWord8 my_payload_type;
 
     // Check if this is an RED payload.
-    if (rtp_info.header.payloadType == _receiveREDPayloadType) {
+    if (rtp_info.header.payloadType == receive_red_pltype_) {
       // Get the primary payload-type.
-      myPayloadType = incoming_payload[0] & 0x7F;
+      my_payload_type = incoming_payload[0] & 0x7F;
     } else {
-      myPayloadType = rtp_info.header.payloadType;
+      my_payload_type = rtp_info.header.payloadType;
     }
 
     // If payload is audio, check if received payload is different from
@@ -2041,108 +1972,108 @@
     if (!rtp_info.type.Audio.isCNG) {
       // This is Audio not CNG.
 
-      if (myPayloadType != _lastRecvAudioCodecPlType) {
+      if (my_payload_type != last_recv_audio_codec_pltype_) {
         // We detect a change in payload type. It is necessary for iSAC
         // we are going to use ONE iSAC instance for decoding both WB and
         // SWB payloads. If payload is changed there might be a need to reset
         // sampling rate of decoder. depending what we have received "now".
         for (int i = 0; i < ACMCodecDB::kMaxNumCodecs; i++) {
-          if (_registeredPlTypes[i] == myPayloadType) {
+          if (registered_pltypes_[i] == my_payload_type) {
             if (UpdateUponReceivingCodec(i) != 0)
               return -1;
             break;
           }
         }
       }
-      _lastRecvAudioCodecPlType = myPayloadType;
+      last_recv_audio_codec_pltype_ = my_payload_type;
     }
   }
 
   // Split the payload for stereo packets, so that first half of payload
   // vector holds left channel, and second half holds right channel.
-  if (_expected_channels == 2) {
+  if (expected_channels_ == 2) {
     if (!rtp_info.type.Audio.isCNG) {
       // Create a new vector for the payload, maximum payload size.
       WebRtc_Word32 length = payload_length;
       WebRtc_UWord8 payload[kMaxPacketSize];
       assert(payload_length <= kMaxPacketSize);
       memcpy(payload, incoming_payload, payload_length);
-      _codecs[_current_receive_codec_idx]->SplitStereoPacket(payload, &length);
+      codecs_[current_receive_codec_idx_]->SplitStereoPacket(payload, &length);
       rtp_header.type.Audio.channel = 2;
       // Insert packet into NetEQ.
-      return _netEq.RecIn(payload, length, rtp_header);
+      return neteq_.RecIn(payload, length, rtp_header);
     } else {
       // If we receive a CNG packet while expecting stereo, we ignore the packet
       // and continue. CNG is not supported for stereo.
       return 0;
     }
   } else {
-    return _netEq.RecIn(incoming_payload, payload_length, rtp_header);
+    return neteq_.RecIn(incoming_payload, payload_length, rtp_header);
   }
 }
 
 int AudioCodingModuleImpl::UpdateUponReceivingCodec(int index) {
-  if (_codecs[index] == NULL) {
-    WEBRTC_TRACE(kTraceError, kTraceAudioCoding, _id,
-        "IncomingPacket() error: payload type found but corresponding codec "
-        "is NULL");
+  if (codecs_[index] == NULL) {
+    WEBRTC_TRACE(kTraceError, kTraceAudioCoding, id_,
+                 "IncomingPacket() error: payload type found but "
+                 "corresponding codec is NULL");
     return -1;
   }
-  _codecs[index]->UpdateDecoderSampFreq(index);
-  _netEq.SetReceivedStereo(_stereoReceive[index]);
-  _current_receive_codec_idx = index;
+  codecs_[index]->UpdateDecoderSampFreq(index);
+  neteq_.set_received_stereo(stereo_receive_[index]);
+  current_receive_codec_idx_ = index;
 
   // If we have a change in the expected number of channels, flush packet
   // buffers in NetEQ.
-  if ((_stereoReceive[index] && (_expected_channels == 1)) ||
-      (!_stereoReceive[index] && (_expected_channels == 2))) {
-    _netEq.FlushBuffers();
-    _codecs[index]->ResetDecoder(_registeredPlTypes[index]);
+  if ((stereo_receive_[index] && (expected_channels_ == 1)) ||
+      (!stereo_receive_[index] && (expected_channels_ == 2))) {
+    neteq_.FlushBuffers();
+    codecs_[index]->ResetDecoder(registered_pltypes_[index]);
   }
 
-  if (_stereoReceive[index] && (_expected_channels == 1)) {
+  if (stereo_receive_[index] && (expected_channels_ == 1)) {
     // When switching from a mono to stereo codec reset the slave.
     if (InitStereoSlave() != 0)
       return -1;
   }
 
   // Store number of channels we expect to receive for the current payload type.
-  if (_stereoReceive[index]) {
-    _expected_channels = 2;
+  if (stereo_receive_[index]) {
+    expected_channels_ = 2;
   } else {
-    _expected_channels = 1;
+    expected_channels_ = 1;
   }
 
   // Reset previous received channel.
-  _prev_received_channel = 0;
+  prev_received_channel_ = 0;
   return 0;
 }
 
 bool AudioCodingModuleImpl::IsCodecForSlave(int index) const {
-  return (_registeredPlTypes[index] != -1 && _stereoReceive[index]);
+  return (registered_pltypes_[index] != -1 && stereo_receive_[index]);
 }
 
 int AudioCodingModuleImpl::InitStereoSlave() {
-  _netEq.RemoveSlaves();
+  neteq_.RemoveSlaves();
 
-  if (_netEq.AddSlave(ACMCodecDB::NetEQDecoders(),
-                      ACMCodecDB::kNumCodecs) < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if (neteq_.AddSlave(ACMCodecDB::NetEQDecoders(),
+                       ACMCodecDB::kNumCodecs) < 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "Cannot add slave jitter buffer to NetEQ.");
     return -1;
   }
 
   // Register all needed codecs with slave.
   for (int i = 0; i < ACMCodecDB::kNumCodecs; i++) {
-    if (_codecs[i] != NULL && IsCodecForSlave(i)) {
+    if (codecs_[i] != NULL && IsCodecForSlave(i)) {
       WebRtcACMCodecParams decoder_params;
-      if (_codecs[i]->DecoderParams(&decoder_params, _registeredPlTypes[i])) {
-        if (RegisterRecCodecMSSafe(decoder_params.codecInstant,
+      if (codecs_[i]->DecoderParams(&decoder_params, registered_pltypes_[i])) {
+        if (RegisterRecCodecMSSafe(decoder_params.codec_inst,
                                    i, ACMCodecDB::MirrorID(i),
-                                   ACMNetEQ::slaveJB) < 0) {
-            WEBRTC_TRACE(kTraceError, kTraceAudioCoding, _id,
-                         "Cannot register slave codec.");
-            return -1;
+                                   ACMNetEQ::kSlaveJb) < 0) {
+          WEBRTC_TRACE(kTraceError, kTraceAudioCoding, id_,
+                       "Cannot register slave codec.");
+          return -1;
         }
       }
     }
@@ -2154,11 +2085,11 @@
 WebRtc_Word32 AudioCodingModuleImpl::SetMinimumPlayoutDelay(
     const WebRtc_Word32 time_ms) {
   if ((time_ms < 0) || (time_ms > 1000)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "Delay must be in the range of 0-1000 milliseconds.");
     return -1;
   }
-  return _netEq.SetExtraDelay(time_ms);
+  return neteq_.SetExtraDelay(time_ms);
 }
 
 // Get Dtmf playout status.
@@ -2166,7 +2097,7 @@
 #ifndef WEBRTC_CODEC_AVT
   return false;
 #else
-  return _netEq.AVTPlayout();
+  return neteq_.avt_playout();
 #endif
 }
 
@@ -2175,12 +2106,12 @@
 WebRtc_Word32 AudioCodingModuleImpl::SetDtmfPlayoutStatus(
 #ifndef WEBRTC_CODEC_AVT
     const bool /* enable */) {
-  WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, _id,
-               "SetDtmfPlayoutStatus() failed: AVT is not supported.");
+  WEBRTC_TRACE(webrtc::kTraceWarning, webrtc::kTraceAudioCoding, id_,
+              "SetDtmfPlayoutStatus() failed: AVT is not supported.");
   return -1;
 #else
     const bool enable) {
-  return _netEq.SetAVTPlayout(enable);
+  return neteq_.SetAVTPlayout(enable);
 #endif
 }
 
@@ -2190,8 +2121,8 @@
 WebRtc_Word32 AudioCodingModuleImpl::DecoderEstimatedBandwidth() const {
   CodecInst codec;
   WebRtc_Word16 codec_id = -1;
-  int payloadtype_wb;
-  int payloadtype_swb;
+  int pltype_wb;
+  int pltype_swb;
 
   // Get iSAC settings.
   for (int id = 0; id < ACMCodecDB::kNumCodecs; id++) {
@@ -2200,24 +2131,24 @@
 
     if (!STR_CASE_CMP(codec.plname, "isac")) {
       codec_id = 1;
-      payloadtype_wb = codec.pltype;
+      pltype_wb = codec.pltype;
 
       ACMCodecDB::Codec(id + 1, &codec);
-      payloadtype_swb = codec.pltype;
+      pltype_swb = codec.pltype;
 
       break;
     }
   }
 
   if (codec_id < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "DecoderEstimatedBandwidth failed");
     return -1;
   }
 
-  if ((_lastRecvAudioCodecPlType == payloadtype_wb) ||
-      (_lastRecvAudioCodecPlType == payloadtype_swb)) {
-    return _codecs[codec_id]->GetEstimatedBandwidth();
+  if ((last_recv_audio_codec_pltype_ == pltype_wb) ||
+      (last_recv_audio_codec_pltype_ == pltype_swb)) {
+    return codecs_[codec_id]->GetEstimatedBandwidth();
   } else {
     return -1;
   }
@@ -2228,16 +2159,16 @@
     const AudioPlayoutMode mode) {
   if ((mode != voice) && (mode != fax) && (mode != streaming) &&
       (mode != off)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "Invalid playout mode.");
     return -1;
   }
-  return _netEq.SetPlayoutMode(mode);
+  return neteq_.SetPlayoutMode(mode);
 }
 
 // Get playout mode voice, fax.
 AudioPlayoutMode AudioCodingModuleImpl::PlayoutMode() const {
-  return _netEq.PlayoutMode();
+  return neteq_.playout_mode();
 }
 
 // Get 10 milliseconds of raw audio data to play out.
@@ -2247,38 +2178,38 @@
   bool stereo_mode;
 
   // RecOut always returns 10 ms.
-  if (_netEq.RecOut(_audioFrame) != 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if (neteq_.RecOut(audio_frame_) != 0) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "PlayoutData failed, RecOut Failed");
     return -1;
   }
 
-  audio_frame.num_channels_ = _audioFrame.num_channels_;
-  audio_frame.vad_activity_ = _audioFrame.vad_activity_;
-  audio_frame.speech_type_ = _audioFrame.speech_type_;
+  audio_frame.num_channels_ = audio_frame_.num_channels_;
+  audio_frame.vad_activity_ = audio_frame_.vad_activity_;
+  audio_frame.speech_type_ = audio_frame_.speech_type_;
 
-  stereo_mode = (_audioFrame.num_channels_ > 1);
+  stereo_mode = (audio_frame_.num_channels_ > 1);
   // For stereo playout:
   // Master and Slave samples are interleaved starting with Master.
 
   const WebRtc_UWord16 receive_freq =
-      static_cast<WebRtc_UWord16>(_audioFrame.sample_rate_hz_);
+      static_cast<WebRtc_UWord16>(audio_frame_.sample_rate_hz_);
   bool tone_detected = false;
   WebRtc_Word16 last_detected_tone;
   WebRtc_Word16 tone;
 
   // Limit the scope of ACM Critical section.
   {
-    CriticalSectionScoped lock(_acmCritSect);
+    CriticalSectionScoped lock(acm_crit_sect_);
 
     if ((receive_freq != desired_freq_hz) && (desired_freq_hz != -1)) {
-      // Resample payloadData.
-      WebRtc_Word16 temp_len = _outputResampler.Resample10Msec(
-          _audioFrame.data_, receive_freq, audio_frame.data_,
-          desired_freq_hz, _audioFrame.num_channels_);
+      // Resample payload_data.
+      WebRtc_Word16 temp_len = output_resampler_.Resample10Msec(
+          audio_frame_.data_, receive_freq, audio_frame.data_,
+          desired_freq_hz, audio_frame_.num_channels_);
 
       if (temp_len < 0) {
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "PlayoutData failed, resampler failed");
         return -1;
       }
@@ -2288,83 +2219,83 @@
       // Set the sampling frequency.
       audio_frame.sample_rate_hz_ = desired_freq_hz;
     } else {
-      memcpy(audio_frame.data_, _audioFrame.data_,
-             _audioFrame.samples_per_channel_ * audio_frame.num_channels_
+      memcpy(audio_frame.data_, audio_frame_.data_,
+             audio_frame_.samples_per_channel_ * audio_frame.num_channels_
              * sizeof(WebRtc_Word16));
       // Set the payload length.
       audio_frame.samples_per_channel_ =
-          _audioFrame.samples_per_channel_;
+          audio_frame_.samples_per_channel_;
       // Set the sampling frequency.
       audio_frame.sample_rate_hz_ = receive_freq;
     }
 
     // Tone detection done for master channel.
-    if (_dtmfDetector != NULL) {
+    if (dtmf_detector_ != NULL) {
       // Dtmf Detection.
       if (audio_frame.sample_rate_hz_ == 8000) {
         // Use audio_frame.data_ then Dtmf detector doesn't
         // need resampling.
         if (!stereo_mode) {
-          _dtmfDetector->Detect(audio_frame.data_,
-                                audio_frame.samples_per_channel_,
-                                audio_frame.sample_rate_hz_, tone_detected,
-                                tone);
+          dtmf_detector_->Detect(audio_frame.data_,
+                                 audio_frame.samples_per_channel_,
+                                 audio_frame.sample_rate_hz_, tone_detected,
+                                 tone);
         } else {
           // We are in 8 kHz so the master channel needs only 80 samples.
           WebRtc_Word16 master_channel[80];
           for (int n = 0; n < 80; n++) {
             master_channel[n] = audio_frame.data_[n << 1];
           }
-          _dtmfDetector->Detect(master_channel,
-                                audio_frame.samples_per_channel_,
-                                audio_frame.sample_rate_hz_, tone_detected,
-                                tone);
+          dtmf_detector_->Detect(master_channel,
+                                 audio_frame.samples_per_channel_,
+                                 audio_frame.sample_rate_hz_, tone_detected,
+                                 tone);
         }
       } else {
-        // Do the detection on the audio that we got from NetEQ (_audioFrame).
+        // Do the detection on the audio that we got from NetEQ (audio_frame_).
         if (!stereo_mode) {
-          _dtmfDetector->Detect(_audioFrame.data_,
-                                _audioFrame.samples_per_channel_,
-                                receive_freq, tone_detected, tone);
+          dtmf_detector_->Detect(audio_frame_.data_,
+                                 audio_frame_.samples_per_channel_,
+                                 receive_freq, tone_detected, tone);
         } else {
           WebRtc_Word16 master_channel[WEBRTC_10MS_PCM_AUDIO];
-          for (int n = 0; n < _audioFrame.samples_per_channel_; n++) {
-            master_channel[n] = _audioFrame.data_[n << 1];
+          for (int n = 0; n < audio_frame_.samples_per_channel_; n++) {
+            master_channel[n] = audio_frame_.data_[n << 1];
           }
-          _dtmfDetector->Detect(master_channel,
-                                _audioFrame.samples_per_channel_,
-                                receive_freq, tone_detected, tone);
+          dtmf_detector_->Detect(master_channel,
+                                 audio_frame_.samples_per_channel_,
+                                 receive_freq, tone_detected, tone);
         }
       }
     }
 
-    // We want to do this while we are in _acmCritSect.
+    // We want to do this while we are in acm_crit_sect_.
     // (Doesn't really need to initialize the following
     // variable but Linux complains if we don't.)
     last_detected_tone = kACMToneEnd;
     if (tone_detected) {
-      last_detected_tone = _lastDetectedTone;
-      _lastDetectedTone = tone;
+      last_detected_tone = last_detected_tone_;
+      last_detected_tone_ = tone;
     }
   }
 
   if (tone_detected) {
     // We will deal with callback here, so enter callback critical section.
-    CriticalSectionScoped lock(_callbackCritSect);
+    CriticalSectionScoped lock(callback_crit_sect_);
 
-    if (_dtmfCallback != NULL) {
+    if (dtmf_callback_ != NULL) {
       if (tone != kACMToneEnd) {
         // just a tone
-        _dtmfCallback->IncomingDtmf((WebRtc_UWord8) tone, false);
+        dtmf_callback_->IncomingDtmf((WebRtc_UWord8) tone, false);
       } else if ((tone == kACMToneEnd) && (last_detected_tone != kACMToneEnd)) {
         // The tone is "END" and the previously detected tone is
         // not "END," so call fir an end.
-        _dtmfCallback->IncomingDtmf((WebRtc_UWord8) last_detected_tone, true);
+        dtmf_callback_->IncomingDtmf((WebRtc_UWord8) last_detected_tone, true);
       }
     }
   }
 
-  audio_frame.id_ = _id;
+  audio_frame.id_ = id_;
   audio_frame.energy_ = -1;
   audio_frame.timestamp_ = 0;
 
@@ -2378,12 +2309,12 @@
 
 // Get VAD aggressiveness on the incoming stream
 ACMVADMode AudioCodingModuleImpl::ReceiveVADMode() const {
-  return _netEq.VADMode();
+  return neteq_.vad_mode();
 }
 
 // Configure VAD aggressiveness on the incoming stream.
 WebRtc_Word16 AudioCodingModuleImpl::SetReceiveVADMode(const ACMVADMode mode) {
-  return _netEq.SetVADMode(mode);
+  return neteq_.SetVADMode(mode);
 }
 
 /////////////////////////////////////////
@@ -2393,57 +2324,56 @@
 WebRtc_Word32 AudioCodingModuleImpl::NetworkStatistics(
     ACMNetworkStatistics& statistics) const {
   WebRtc_Word32 status;
-  status = _netEq.NetworkStatistics(&statistics);
+  status = neteq_.NetworkStatistics(&statistics);
   return status;
 }
 
-
 void AudioCodingModuleImpl::DestructEncoderInst(void* inst) {
-  WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, _id,
+  WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, id_,
                "DestructEncoderInst()");
   if (!HaveValidEncoder("DestructEncoderInst")) {
     return;
   }
 
-  _codecs[_currentSendCodecIdx]->DestructEncoderInst(inst);
+  codecs_[current_send_codec_idx_]->DestructEncoderInst(inst);
 }
 
 WebRtc_Word16 AudioCodingModuleImpl::AudioBuffer(
     WebRtcACMAudioBuff& buffer) {
-  WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, _id,
+  WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, id_,
                "AudioBuffer()");
   if (!HaveValidEncoder("AudioBuffer")) {
     return -1;
   }
-  buffer.lastInTimestamp = _lastInTimestamp;
-  return _codecs[_currentSendCodecIdx]->AudioBuffer(buffer);
+  buffer.last_in_timestamp = last_in_timestamp_;
+  return codecs_[current_send_codec_idx_]->AudioBuffer(buffer);
 }
 
 WebRtc_Word16 AudioCodingModuleImpl::SetAudioBuffer(
     WebRtcACMAudioBuff& buffer) {
-  WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, _id,
+  WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, id_,
                "SetAudioBuffer()");
   if (!HaveValidEncoder("SetAudioBuffer")) {
     return -1;
   }
-  return _codecs[_currentSendCodecIdx]->SetAudioBuffer(buffer);
+  return codecs_[current_send_codec_idx_]->SetAudioBuffer(buffer);
 }
 
 WebRtc_UWord32 AudioCodingModuleImpl::EarliestTimestamp() const {
-  WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, _id,
+  WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, id_,
                "EarliestTimestamp()");
   if (!HaveValidEncoder("EarliestTimestamp")) {
     return -1;
   }
-  return _codecs[_currentSendCodecIdx]->EarliestTimestamp();
+  return codecs_[current_send_codec_idx_]->EarliestTimestamp();
 }
 
 WebRtc_Word32 AudioCodingModuleImpl::RegisterVADCallback(
     ACMVADCallback* vad_callback) {
-  WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, _id,
+  WEBRTC_TRACE(webrtc::kTraceDebug, webrtc::kTraceAudioCoding, id_,
                "RegisterVADCallback()");
-  CriticalSectionScoped lock(_callbackCritSect);
-  _vadCallback = vad_callback;
+  CriticalSectionScoped lock(callback_crit_sect_);
+  vad_callback_ = vad_callback;
   return 0;
 }
 
@@ -2453,43 +2383,44 @@
     const WebRtc_UWord8 payload_type, const WebRtc_UWord32 timestamp) {
   if (payload_length < 0) {
     // Log error in trace file.
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "IncomingPacket() Error, payload-length cannot be negative");
     return -1;
   }
 
-  if (_dummyRTPHeader == NULL) {
-    // This is the first time that we are using _dummyRTPHeader
+  if (dummy_rtp_header_ == NULL) {
+    // This is the first time that we are using |dummy_rtp_header_|
     // so we have to create it.
     WebRtcACMCodecParams codec_params;
-    _dummyRTPHeader = new WebRtcRTPHeader;
-    if (_dummyRTPHeader == NULL) {
-      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
-                   "IncomingPacket() Error, out of memory");
+    dummy_rtp_header_ = new WebRtcRTPHeader;
+    if (dummy_rtp_header_ == NULL) {
+      WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
+                   "IncomingPayload() Error, out of memory");
       return -1;
     }
-    _dummyRTPHeader->header.payloadType = payload_type;
+    dummy_rtp_header_->header.payloadType = payload_type;
     // Don't matter in this case.
-    _dummyRTPHeader->header.ssrc = 0;
-    _dummyRTPHeader->header.markerBit = false;
+    dummy_rtp_header_->header.ssrc = 0;
+    dummy_rtp_header_->header.markerBit = false;
     // Start with random numbers.
-    _dummyRTPHeader->header.sequenceNumber = rand();
-    _dummyRTPHeader->header.timestamp = (((WebRtc_UWord32) rand()) << 16)
-        + (WebRtc_UWord32) rand();
-    _dummyRTPHeader->type.Audio.channel = 1;
+    dummy_rtp_header_->header.sequenceNumber = rand();
+    dummy_rtp_header_->header.timestamp =
+        (static_cast<WebRtc_UWord32>(rand()) << 16) +
+        static_cast<WebRtc_UWord32>(rand());
+    dummy_rtp_header_->type.Audio.channel = 1;
 
     if (DecoderParamByPlType(payload_type, codec_params) < 0) {
       // We didn't find a codec with the given payload.
-      // Something is wrong we exit, but we delete _dummyRTPHeader
+      // Something is wrong we exit, but we delete |dummy_rtp_header_|
       // and set it to NULL to start clean next time.
-      delete _dummyRTPHeader;
-      _dummyRTPHeader = NULL;
+      delete dummy_rtp_header_;
+      dummy_rtp_header_ = NULL;
       return -1;
     }
-    _recvPlFrameSizeSmpls = codec_params.codecInstant.pacsize;
+    recv_pl_frame_size_smpls_ = codec_params.codec_inst.pacsize;
   }
 
-  if (payload_type != _dummyRTPHeader->header.payloadType) {
+  if (payload_type != dummy_rtp_header_->header.payloadType) {
     // Payload type has changed since the last time we might need to
     // update the frame-size.
     WebRtcACMCodecParams codec_params;
@@ -2497,38 +2428,38 @@
       // We didn't find a codec with the given payload.
       return -1;
     }
-    _recvPlFrameSizeSmpls = codec_params.codecInstant.pacsize;
-    _dummyRTPHeader->header.payloadType = payload_type;
+    recv_pl_frame_size_smpls_ = codec_params.codec_inst.pacsize;
+    dummy_rtp_header_->header.payloadType = payload_type;
   }
 
   if (timestamp > 0) {
-    _dummyRTPHeader->header.timestamp = timestamp;
+    dummy_rtp_header_->header.timestamp = timestamp;
   }
 
   // Store the payload Type. this will be used to retrieve "received codec"
   // and "received frequency."
-  _lastRecvAudioCodecPlType = payload_type;
+  last_recv_audio_codec_pltype_ = payload_type;
 
   // Insert in NetEQ.
-  if (_netEq.RecIn(incoming_payload, payload_length, (*_dummyRTPHeader)) < 0) {
+  if (neteq_.RecIn(incoming_payload, payload_length, *dummy_rtp_header_) < 0) {
     return -1;
   }
 
   // Get ready for the next payload.
-  _dummyRTPHeader->header.sequenceNumber++;
-  _dummyRTPHeader->header.timestamp += _recvPlFrameSizeSmpls;
+  dummy_rtp_header_->header.sequenceNumber++;
+  dummy_rtp_header_->header.timestamp += recv_pl_frame_size_smpls_;
   return 0;
 }
 
 WebRtc_Word16 AudioCodingModuleImpl::DecoderParamByPlType(
     const WebRtc_UWord8 payload_type,
     WebRtcACMCodecParams& codec_params) const {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
   for (WebRtc_Word16 id = 0; id < ACMCodecDB::kMaxNumCodecs;
       id++) {
-    if (_codecs[id] != NULL) {
-      if (_codecs[id]->DecoderInitialized()) {
-        if (_codecs[id]->DecoderParams(&codec_params, payload_type)) {
+    if (codecs_[id] != NULL) {
+      if (codecs_[id]->DecoderInitialized()) {
+        if (codecs_[id]->DecoderParams(&codec_params, payload_type)) {
           return 0;
         }
       }
@@ -2537,25 +2468,25 @@
   // If we are here it means that we could not find a
   // codec with that payload type. reset the values to
   // not acceptable values and return -1.
-  codec_params.codecInstant.plname[0] = '\0';
-  codec_params.codecInstant.pacsize = 0;
-  codec_params.codecInstant.rate = 0;
-  codec_params.codecInstant.pltype = -1;
+  codec_params.codec_inst.plname[0] = '\0';
+  codec_params.codec_inst.pacsize = 0;
+  codec_params.codec_inst.rate = 0;
+  codec_params.codec_inst.pltype = -1;
   return -1;
 }
 
 WebRtc_Word16 AudioCodingModuleImpl::DecoderListIDByPlName(
     const char* name, const WebRtc_UWord16 frequency) const {
   WebRtcACMCodecParams codec_params;
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
   for (WebRtc_Word16 id = 0; id < ACMCodecDB::kMaxNumCodecs; id++) {
-    if ((_codecs[id] != NULL)) {
-      if (_codecs[id]->DecoderInitialized()) {
-        assert(_registeredPlTypes[id] >= 0);
-        assert(_registeredPlTypes[id] <= 255);
-        _codecs[id]->DecoderParams(
-            &codec_params, (WebRtc_UWord8) _registeredPlTypes[id]);
-        if (!STR_CASE_CMP(codec_params.codecInstant.plname, name)) {
+    if ((codecs_[id] != NULL)) {
+      if (codecs_[id]->DecoderInitialized()) {
+        assert(registered_pltypes_[id] >= 0);
+        assert(registered_pltypes_[id] <= 255);
+        codecs_[id]->DecoderParams(
+            &codec_params, (WebRtc_UWord8) registered_pltypes_[id]);
+        if (!STR_CASE_CMP(codec_params.codec_inst.plname, name)) {
           // Check if the given sampling frequency matches.
           // A zero sampling frequency means we matching the names
           // is sufficient and we don't need to check for the
@@ -2563,7 +2494,7 @@
           // Currently it is only iSAC which has one name but two
           // sampling frequencies.
           if ((frequency == 0)||
-              (codec_params.codecInstant.plfreq == frequency)) {
+              (codec_params.codec_inst.plfreq == frequency)) {
             return id;
           }
         }
@@ -2577,32 +2508,32 @@
 
 WebRtc_Word32 AudioCodingModuleImpl::LastEncodedTimestamp(
     WebRtc_UWord32& timestamp) const {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
   if (!HaveValidEncoder("LastEncodedTimestamp")) {
     return -1;
   }
-  timestamp = _codecs[_currentSendCodecIdx]->LastEncodedTimestamp();
+  timestamp = codecs_[current_send_codec_idx_]->LastEncodedTimestamp();
   return 0;
 }
 
 WebRtc_Word32 AudioCodingModuleImpl::ReplaceInternalDTXWithWebRtc(
     bool use_webrtc_dtx) {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
   if (!HaveValidEncoder("ReplaceInternalDTXWithWebRtc")) {
     WEBRTC_TRACE(
-        webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+        webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
         "Cannot replace codec internal DTX when no send codec is registered.");
     return -1;
   }
 
-  WebRtc_Word32 res = _codecs[_currentSendCodecIdx]->ReplaceInternalDTX(
+  WebRtc_Word32 res = codecs_[current_send_codec_idx_]->ReplaceInternalDTX(
       use_webrtc_dtx);
   // Check if VAD is turned on, or if there is any error.
   if (res == 1) {
-    _vadEnabled = true;
+    vad_enabled_ = true;
   } else if (res < 0) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "Failed to set ReplaceInternalDTXWithWebRtc(%d)",
                  use_webrtc_dtx);
     return res;
@@ -2613,12 +2544,12 @@
 
 WebRtc_Word32 AudioCodingModuleImpl::IsInternalDTXReplacedWithWebRtc(
     bool& uses_webrtc_dtx) {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
   if (!HaveValidEncoder("IsInternalDTXReplacedWithWebRtc")) {
     return -1;
   }
-  if (_codecs[_currentSendCodecIdx]->IsInternalDTXReplaced(&uses_webrtc_dtx)
+  if (codecs_[current_send_codec_idx_]->IsInternalDTXReplaced(&uses_webrtc_dtx)
       < 0) {
     return -1;
   }
@@ -2627,24 +2558,24 @@
 
 WebRtc_Word32 AudioCodingModuleImpl::SetISACMaxRate(
     const WebRtc_UWord32 max_bit_per_sec) {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
   if (!HaveValidEncoder("SetISACMaxRate")) {
     return -1;
   }
 
-  return _codecs[_currentSendCodecIdx]->SetISACMaxRate(max_bit_per_sec);
+  return codecs_[current_send_codec_idx_]->SetISACMaxRate(max_bit_per_sec);
 }
 
 WebRtc_Word32 AudioCodingModuleImpl::SetISACMaxPayloadSize(
     const WebRtc_UWord16 max_size_bytes) {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
   if (!HaveValidEncoder("SetISACMaxPayloadSize")) {
     return -1;
   }
 
-  return _codecs[_currentSendCodecIdx]->SetISACMaxPayloadSize(
+  return codecs_[current_send_codec_idx_]->SetISACMaxPayloadSize(
       max_size_bytes);
 }
 
@@ -2652,53 +2583,53 @@
     const WebRtc_UWord8 frame_size_ms,
     const WebRtc_UWord16 rate_bit_per_sec,
     const bool enforce_frame_size) {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
 
   if (!HaveValidEncoder("ConfigISACBandwidthEstimator")) {
     return -1;
   }
 
-  return _codecs[_currentSendCodecIdx]->ConfigISACBandwidthEstimator(
+  return codecs_[current_send_codec_idx_]->ConfigISACBandwidthEstimator(
       frame_size_ms, rate_bit_per_sec, enforce_frame_size);
 }
 
 WebRtc_Word32 AudioCodingModuleImpl::SetBackgroundNoiseMode(
     const ACMBackgroundNoiseMode mode) {
   if ((mode < On) || (mode > Off)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "The specified background noise is out of range.\n");
     return -1;
   }
-  return _netEq.SetBackgroundNoiseMode(mode);
+  return neteq_.SetBackgroundNoiseMode(mode);
 }
 
 WebRtc_Word32 AudioCodingModuleImpl::BackgroundNoiseMode(
     ACMBackgroundNoiseMode& mode) {
-  return _netEq.BackgroundNoiseMode(mode);
+  return neteq_.BackgroundNoiseMode(mode);
 }
 
 WebRtc_Word32 AudioCodingModuleImpl::PlayoutTimestamp(
     WebRtc_UWord32& timestamp) {
-  WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, _id,
+  WEBRTC_TRACE(webrtc::kTraceStream, webrtc::kTraceAudioCoding, id_,
                "PlayoutTimestamp()");
-  return _netEq.PlayoutTimestamp(timestamp);
+  return neteq_.PlayoutTimestamp(timestamp);
 }
 
 bool AudioCodingModuleImpl::HaveValidEncoder(const char* caller_name) const {
-  if ((!_sendCodecRegistered) || (_currentSendCodecIdx < 0) ||
-      (_currentSendCodecIdx >= ACMCodecDB::kNumCodecs)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if ((!send_codec_registered_) || (current_send_codec_idx_ < 0) ||
+      (current_send_codec_idx_ >= ACMCodecDB::kNumCodecs)) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "%s failed: No send codec is registered.", caller_name);
     return false;
   }
-  if ((_currentSendCodecIdx < 0) ||
-      (_currentSendCodecIdx >= ACMCodecDB::kNumCodecs)) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if ((current_send_codec_idx_ < 0) ||
+      (current_send_codec_idx_ >= ACMCodecDB::kNumCodecs)) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "%s failed: Send codec index out of range.", caller_name);
     return false;
   }
-  if (_codecs[_currentSendCodecIdx] == NULL) {
-    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+  if (codecs_[current_send_codec_idx_] == NULL) {
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                  "%s failed: Send codec is NULL pointer.", caller_name);
     return false;
   }
@@ -2707,12 +2638,12 @@
 
 WebRtc_Word32 AudioCodingModuleImpl::UnregisterReceiveCodec(
     const WebRtc_Word16 payload_type) {
-  CriticalSectionScoped lock(_acmCritSect);
+  CriticalSectionScoped lock(acm_crit_sect_);
   int id;
 
   // Search through the list of registered payload types.
   for (id = 0; id < ACMCodecDB::kMaxNumCodecs; id++) {
-    if (_registeredPlTypes[id] == payload_type) {
+    if (registered_pltypes_[id] == payload_type) {
       // We have found the id registered with the payload type.
       break;
     }
@@ -2733,17 +2664,17 @@
   WebRtc_Word16 mirror_id = ACMCodecDB::MirrorID(codec_id);
   bool stereo_receiver = false;
 
-  if (_codecs[codec_id] != NULL) {
-    if (_registeredPlTypes[codec_id] != -1) {
+  if (codecs_[codec_id] != NULL) {
+    if (registered_pltypes_[codec_id] != -1) {
       // Store stereo information for future use.
-      stereo_receiver = _stereoReceive[codec_id];
+      stereo_receiver = stereo_receive_[codec_id];
 
       // Before deleting the decoder instance unregister from NetEQ.
-      if (_netEq.RemoveCodec(neteq_decoder[codec_id],
-                             _stereoReceive[codec_id])  < 0) {
+      if (neteq_.RemoveCodec(neteq_decoder[codec_id],
+                              stereo_receive_[codec_id])  < 0) {
         CodecInst codec;
         ACMCodecDB::Codec(codec_id, &codec);
-        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, _id,
+        WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, id_,
                      "Unregistering %s-%d from NetEQ failed.", codec.plname,
                      codec.plfreq);
         return -1;
@@ -2754,17 +2685,16 @@
       if (IsCodecCN(codec_id)) {
         for (int i = 0; i < ACMCodecDB::kNumCodecs; i++) {
           if (IsCodecCN(i)) {
-            _stereoReceive[i] = false;
-            _registeredPlTypes[i] = -1;
+            stereo_receive_[i] = false;
+            registered_pltypes_[i] = -1;
           }
         }
       } else {
         if (codec_id == mirror_id) {
-          _codecs[codec_id]->DestructDecoder();
-          if (_stereoReceive[codec_id]) {
-            _slaveCodecs[codec_id]->DestructDecoder();
-            _stereoReceive[codec_id] = false;
-
+          codecs_[codec_id]->DestructDecoder();
+          if (stereo_receive_[codec_id]) {
+            slave_codecs_[codec_id]->DestructDecoder();
+            stereo_receive_[codec_id] = false;
           }
         }
       }
@@ -2774,7 +2704,7 @@
         bool no_stereo = true;
 
         for (int i = 0; i < ACMCodecDB::kNumCodecs; i++) {
-          if (_stereoReceive[i]) {
+          if (stereo_receive_[i]) {
             // We still have stereo codecs registered.
             no_stereo = false;
             break;
@@ -2783,18 +2713,18 @@
 
         // If we don't have any stereo codecs left, change status.
         if (no_stereo) {
-          _netEq.RemoveSlaves();  // No longer need the slave.
-          _stereoReceiveRegistered = false;
+          neteq_.RemoveSlaves();  // No longer need the slave.
+          stereo_receive_registered_ = false;
         }
       }
     }
   }
 
-  if (_registeredPlTypes[codec_id] == _receiveREDPayloadType) {
+  if (registered_pltypes_[codec_id] == receive_red_pltype_) {
     // RED is going to be unregistered, set to an invalid value.
-    _receiveREDPayloadType = 255;
+    receive_red_pltype_ = 255;
   }
-  _registeredPlTypes[codec_id] = -1;
+  registered_pltypes_[codec_id] = -1;
 
   return 0;
 }
@@ -2806,24 +2736,24 @@
     return -1;
   }
   WebRtc_Word16 status;
-  status = _codecs[_currentSendCodecIdx]->REDPayloadISAC(isac_rate,
-                                                         isac_bw_estimate,
-                                                         payload,
-                                                         length_bytes);
+  status = codecs_[current_send_codec_idx_]->REDPayloadISAC(isac_rate,
+                                                            isac_bw_estimate,
+                                                            payload,
+                                                            length_bytes);
   return status;
 }
 
 void AudioCodingModuleImpl::ResetFragmentation(int vector_size) {
   for (int n = 0; n < kMaxNumFragmentationVectors; n++) {
-    _fragmentation.fragmentationOffset[n] = n * MAX_PAYLOAD_SIZE_BYTE;
+    fragmentation_.fragmentationOffset[n] = n * MAX_PAYLOAD_SIZE_BYTE;
   }
-  memset(_fragmentation.fragmentationLength, 0, kMaxNumFragmentationVectors *
-         sizeof(_fragmentation.fragmentationLength[0]));
-  memset(_fragmentation.fragmentationTimeDiff, 0, kMaxNumFragmentationVectors *
-         sizeof(_fragmentation.fragmentationTimeDiff[0]));
-  memset(_fragmentation.fragmentationPlType, 0, kMaxNumFragmentationVectors *
-         sizeof(_fragmentation.fragmentationPlType[0]));
-  _fragmentation.fragmentationVectorSize =
+  memset(fragmentation_.fragmentationLength, 0, kMaxNumFragmentationVectors *
+         sizeof(fragmentation_.fragmentationLength[0]));
+  memset(fragmentation_.fragmentationTimeDiff, 0, kMaxNumFragmentationVectors *
+         sizeof(fragmentation_.fragmentationTimeDiff[0]));
+  memset(fragmentation_.fragmentationPlType, 0, kMaxNumFragmentationVectors *
+         sizeof(fragmentation_.fragmentationPlType[0]));
+  fragmentation_.fragmentationVectorSize =
       static_cast<WebRtc_UWord16>(vector_size);
 }
 
diff --git a/webrtc/modules/audio_coding/main/source/audio_coding_module_impl.h b/webrtc/modules/audio_coding/main/source/audio_coding_module_impl.h
index c631067..a8950a6 100644
--- a/webrtc/modules/audio_coding/main/source/audio_coding_module_impl.h
+++ b/webrtc/modules/audio_coding/main/source/audio_coding_module_impl.h
@@ -11,11 +11,11 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_AUDIO_CODING_MODULE_IMPL_H_
 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_AUDIO_CODING_MODULE_IMPL_H_
 
-#include "acm_codec_database.h"
-#include "acm_neteq.h"
-#include "acm_resampler.h"
-#include "common_types.h"
-#include "engine_configurations.h"
+#include "webrtc/common_types.h"
+#include "webrtc/engine_configurations.h"
+#include "webrtc/modules/audio_coding/main/source/acm_codec_database.h"
+#include "webrtc/modules/audio_coding/main/source/acm_neteq.h"
+#include "webrtc/modules/audio_coding/main/source/acm_resampler.h"
 #include "webrtc/system_wrappers/interface/scoped_ptr.h"
 
 namespace webrtc {
@@ -25,14 +25,10 @@
 class CriticalSectionWrapper;
 class RWLockWrapper;
 
-#ifdef ACM_QA_TEST
-#   include <stdio.h>
-#endif
-
 class AudioCodingModuleImpl : public AudioCodingModule {
  public:
   // Constructor
-  AudioCodingModuleImpl(const WebRtc_Word32 id);
+  explicit AudioCodingModuleImpl(const WebRtc_Word32 id);
 
   // Destructor
   ~AudioCodingModuleImpl();
@@ -77,9 +73,9 @@
   // Get current send frequency.
   WebRtc_Word32 SendFrequency() const;
 
-  // Get encode bitrate.
+  // Get encode bit-rate.
   // Adaptive rate codecs return their current encode target rate, while other
-  // codecs return there longterm avarage or their fixed rate.
+  // codecs return there long-term average or their fixed rate.
   WebRtc_Word32 SendBitrate() const;
 
   // Set available bandwidth, inform the encoder about the
@@ -96,7 +92,7 @@
   WebRtc_Word32 RegisterIncomingMessagesCallback(
       AudioCodingFeedback* incoming_message, const ACMCountries cpt);
 
-  // Add 10MS of raw (PCM) audio data to the encoder.
+  // Add 10 ms of raw (PCM) audio data to the encoder.
   WebRtc_Word32 Add10MsData(const AudioFrame& audio_frame);
 
   // Set background noise mode for NetEQ, on, off or fade.
@@ -128,7 +124,7 @@
   WebRtc_Word32 VAD(bool& dtx_enabled, bool& vad_enabled,
                     ACMVADMode& mode) const;
 
-  WebRtc_Word32 RegisterVADCallback(ACMVADCallback* vadCallback);
+  WebRtc_Word32 RegisterVADCallback(ACMVADCallback* vad_callback);
 
   // Get VAD aggressiveness on the incoming stream.
   ACMVADMode ReceiveVADMode() const;
@@ -152,7 +148,7 @@
   // Get current playout frequency.
   WebRtc_Word32 PlayoutFrequency() const;
 
-  // Register possible reveive codecs, can be called multiple times,
+  // Register possible receive codecs, can be called multiple times,
   // for codecs, CNG, DTMF, RED.
   WebRtc_Word32 RegisterReceiveCodec(const CodecInst& receive_codec);
 
@@ -171,7 +167,7 @@
                                 const WebRtc_UWord8 payload_type,
                                 const WebRtc_UWord32 timestamp = 0);
 
-  // Minimum playout dealy (used for lip-sync).
+  // Minimum playout delay (used for lip-sync).
   WebRtc_Word32 SetMinimumPlayoutDelay(const WebRtc_Word32 time_ms);
 
   // Configure Dtmf playout status i.e on/off playout the incoming outband Dtmf
@@ -258,7 +254,7 @@
   WebRtc_Word32 RegisterRecCodecMSSafe(const CodecInst& receive_codec,
                                        WebRtc_Word16 codec_id,
                                        WebRtc_Word16 mirror_id,
-                                       ACMNetEQ::JB jitter_buffer);
+                                       ACMNetEQ::JitterBuffer jitter_buffer);
 
   // Set VAD/DTX status. This function does not acquire a lock, and it is
   // created to be called only from inside a critical section.
@@ -273,19 +269,16 @@
   int ProcessDualStream();
 
   // Preprocessing of input audio, including resampling and down-mixing if
-  // required, before pushing audio into encoder'r buffer.
+  // required, before pushing audio into encoder's buffer.
   //
   // in_frame: input audio-frame
-  // out_frame: output audio_frame, the output is valid only if a preprocessing
-  //            is required.
+  // ptr_out: pointer to output audio_frame. If no preprocessing is required
+  //          |ptr_out| will be pointing to |in_frame|, otherwise pointing to
+  //          |preprocess_frame_|.
   //
   // Return value:
   //   -1: if encountering an error.
-  //    kPreprocessingSuccessful: if a preprocessing successfully performed.
-  //    kNoPreprocessingRequired: if there was no need for preprocessing. In
-  //                              this case |out_frame| is not updated and
-  //                              |in_frame| has to be used for further
-  //                              operations.
+  //    0: otherwise.
   int PreprocessToAddData(const AudioFrame& in_frame,
                           const AudioFrame** ptr_out);
 
@@ -304,89 +297,84 @@
 
   int EncodeFragmentation(int fragmentation_index, int payload_type,
                           uint32_t current_timestamp,
-                          ACMGenericCodec* _secondary_encoder,
+                          ACMGenericCodec* encoder,
                           uint8_t* stream);
 
   void ResetFragmentation(int vector_size);
 
-  AudioPacketizationCallback* _packetizationCallback;
-  WebRtc_Word32 _id;
-  WebRtc_UWord32 _lastTimestamp;
-  WebRtc_UWord32 _lastInTimestamp;
-  CodecInst _sendCodecInst;
-  uint8_t _cng_nb_pltype;
-  uint8_t _cng_wb_pltype;
-  uint8_t _cng_swb_pltype;
-  uint8_t _cng_fb_pltype;
-  uint8_t _red_pltype;
-  bool _vadEnabled;
-  bool _dtxEnabled;
-  ACMVADMode _vadMode;
-  ACMGenericCodec* _codecs[ACMCodecDB::kMaxNumCodecs];
-  ACMGenericCodec* _slaveCodecs[ACMCodecDB::kMaxNumCodecs];
-  WebRtc_Word16 _mirrorCodecIdx[ACMCodecDB::kMaxNumCodecs];
-  bool _stereoReceive[ACMCodecDB::kMaxNumCodecs];
-  bool _stereoReceiveRegistered;
-  bool _stereoSend;
-  int _prev_received_channel;
-  int _expected_channels;
-  WebRtc_Word32 _currentSendCodecIdx;
-  int _current_receive_codec_idx;
-  bool _sendCodecRegistered;
-  ACMResampler _inputResampler;
-  ACMResampler _outputResampler;
-  ACMNetEQ _netEq;
-  CriticalSectionWrapper* _acmCritSect;
-  ACMVADCallback* _vadCallback;
-  WebRtc_UWord8 _lastRecvAudioCodecPlType;
+  AudioPacketizationCallback* packetization_callback_;
+  WebRtc_Word32 id_;
+  WebRtc_UWord32 last_timestamp_;
+  WebRtc_UWord32 last_in_timestamp_;
+  CodecInst send_codec_inst_;
+  uint8_t cng_nb_pltype_;
+  uint8_t cng_wb_pltype_;
+  uint8_t cng_swb_pltype_;
+  uint8_t cng_fb_pltype_;
+  uint8_t red_pltype_;
+  bool vad_enabled_;
+  bool dtx_enabled_;
+  ACMVADMode vad_mode_;
+  ACMGenericCodec* codecs_[ACMCodecDB::kMaxNumCodecs];
+  ACMGenericCodec* slave_codecs_[ACMCodecDB::kMaxNumCodecs];
+  WebRtc_Word16 mirror_codec_idx_[ACMCodecDB::kMaxNumCodecs];
+  bool stereo_receive_[ACMCodecDB::kMaxNumCodecs];
+  bool stereo_receive_registered_;
+  bool stereo_send_;
+  int prev_received_channel_;
+  int expected_channels_;
+  WebRtc_Word32 current_send_codec_idx_;
+  int current_receive_codec_idx_;
+  bool send_codec_registered_;
+  ACMResampler input_resampler_;
+  ACMResampler output_resampler_;
+  ACMNetEQ neteq_;
+  CriticalSectionWrapper* acm_crit_sect_;
+  ACMVADCallback* vad_callback_;
+  WebRtc_UWord8 last_recv_audio_codec_pltype_;
 
   // RED/FEC.
-  bool _isFirstRED;
-  bool _fecEnabled;
-  // TODO(turajs): |_redBuffer| is allocated in constructor, why having them
+  bool is_first_red_;
+  bool fec_enabled_;
+  // TODO(turajs): |red_buffer_| is allocated in constructor, why having them
   // as pointers and not an array. If concerned about the memory, then make a
   // set-up function to allocate them only when they are going to be used, i.e.
   // FEC or Dual-streaming is enabled.
-  WebRtc_UWord8* _redBuffer;
-  // TODO(turajs): we actually don't need |_fragmentation| as a member variable.
+  WebRtc_UWord8* red_buffer_;
+  // TODO(turajs): we actually don't need |fragmentation_| as a member variable.
   // It is sufficient to keep the length & payload type of previous payload in
   // member variables.
-  RTPFragmentationHeader _fragmentation;
-  WebRtc_UWord32 _lastFECTimestamp;
+  RTPFragmentationHeader fragmentation_;
+  WebRtc_UWord32 last_fec_timestamp_;
   // If no RED is registered as receive codec this
   // will have an invalid value.
-  WebRtc_UWord8 _receiveREDPayloadType;
+  WebRtc_UWord8 receive_red_pltype_;
 
   // This is to keep track of CN instances where we can send DTMFs.
-  WebRtc_UWord8 _previousPayloadType;
+  WebRtc_UWord8 previous_pltype_;
 
-  // This keeps track of payload types associated with _codecs[].
+  // This keeps track of payload types associated with codecs_[].
   // We define it as signed variable and initialize with -1 to indicate
   // unused elements.
-  WebRtc_Word16 _registeredPlTypes[ACMCodecDB::kMaxNumCodecs];
+  WebRtc_Word16 registered_pltypes_[ACMCodecDB::kMaxNumCodecs];
 
   // Used when payloads are pushed into ACM without any RTP info
   // One example is when pre-encoded bit-stream is pushed from
   // a file.
-  WebRtcRTPHeader* _dummyRTPHeader;
-  WebRtc_UWord16 _recvPlFrameSizeSmpls;
+  WebRtcRTPHeader* dummy_rtp_header_;
+  WebRtc_UWord16 recv_pl_frame_size_smpls_;
 
-  bool _receiverInitialized;
-  ACMDTMFDetection* _dtmfDetector;
+  bool receiver_initialized_;
+  ACMDTMFDetection* dtmf_detector_;
 
-  AudioCodingFeedback* _dtmfCallback;
-  WebRtc_Word16 _lastDetectedTone;
-  CriticalSectionWrapper* _callbackCritSect;
+  AudioCodingFeedback* dtmf_callback_;
+  WebRtc_Word16 last_detected_tone_;
+  CriticalSectionWrapper* callback_crit_sect_;
 
-  AudioFrame _audioFrame;
-  AudioFrame _preprocess_frame;
-  CodecInst _secondarySendCodecInst;
-  scoped_ptr<ACMGenericCodec> _secondaryEncoder;
-#ifdef ACM_QA_TEST
-  FILE* _outgoingPL;
-  FILE* _incomingPL;
-#endif
-
+  AudioFrame audio_frame_;
+  AudioFrame preprocess_frame_;
+  CodecInst secondary_send_codec_inst_;
+  scoped_ptr<ACMGenericCodec> secondary_encoder_;
 };
 
 }  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/main/test/Channel.h b/webrtc/modules/audio_coding/main/test/Channel.h
index 617027e..7484584 100644
--- a/webrtc/modules/audio_coding/main/test/Channel.h
+++ b/webrtc/modules/audio_coding/main/test/Channel.h
@@ -16,6 +16,7 @@
 #include "audio_coding_module.h"
 #include "critical_section_wrapper.h"
 #include "rw_lock_wrapper.h"
+#include "webrtc/modules/interface/module_common_types.h"
 
 namespace webrtc {