AudioDecoder: Replace Init() with Reset()

The Init() method was previously used to initialize and reset
decoders, and returned an error code. The new Reset() method is used
for reset only; the constructor is now responsible for fully
initializing the AudioDecoder.

Reset() doesn't return an error code; it turned out that none of the
functions it ended up calling could actually fail, so this CL removes
their error return codes as well.

R=henrik.lundin@webrtc.org

Review URL: https://codereview.webrtc.org/1319683002 .

Cr-Commit-Position: refs/heads/master@{#9798}
diff --git a/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h b/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h
index a2c43a6..a8498fa 100644
--- a/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h
+++ b/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h
@@ -95,7 +95,7 @@
 
   bool HasDecodePlc() const override;
   size_t DecodePlc(size_t num_frames, int16_t* decoded) override;
-  int Init() override;
+  void Reset() override;
   int IncomingPacket(const uint8_t* payload,
                      size_t payload_len,
                      uint16_t rtp_sequence_number,
diff --git a/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t_impl.h b/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t_impl.h
index 93fbde9..98f3ed9 100644
--- a/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t_impl.h
+++ b/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t_impl.h
@@ -185,7 +185,7 @@
 AudioDecoderIsacT<T>::AudioDecoderIsacT(LockedIsacBandwidthInfo* bwinfo)
     : bwinfo_(bwinfo), decoder_sample_rate_hz_(-1) {
   CHECK_EQ(0, T::Create(&isac_state_));
-  CHECK_EQ(0, T::DecoderInit(isac_state_));
+  T::DecoderInit(isac_state_);
   if (bwinfo_) {
     IsacBandwidthInfo bwinfo;
     T::GetBandwidthInfo(isac_state_, &bwinfo);
@@ -232,8 +232,8 @@
 }
 
 template <typename T>
-int AudioDecoderIsacT<T>::Init() {
-  return T::DecoderInit(isac_state_);
+void AudioDecoderIsacT<T>::Reset() {
+  T::DecoderInit(isac_state_);
 }
 
 template <typename T>
diff --git a/webrtc/modules/audio_coding/codecs/isac/fix/interface/audio_encoder_isacfix.h b/webrtc/modules/audio_coding/codecs/isac/fix/interface/audio_encoder_isacfix.h
index 6c61915..0fd05da 100644
--- a/webrtc/modules/audio_coding/codecs/isac/fix/interface/audio_encoder_isacfix.h
+++ b/webrtc/modules/audio_coding/codecs/isac/fix/interface/audio_encoder_isacfix.h
@@ -50,8 +50,8 @@
                                  size_t num_lost_frames) {
     return WebRtcIsacfix_DecodePlc(inst, decoded, num_lost_frames);
   }
-  static inline int16_t DecoderInit(instance_type* inst) {
-    return WebRtcIsacfix_DecoderInit(inst);
+  static inline void DecoderInit(instance_type* inst) {
+    WebRtcIsacfix_DecoderInit(inst);
   }
   static inline int Encode(instance_type* inst,
                            const int16_t* speech_in,
diff --git a/webrtc/modules/audio_coding/codecs/isac/fix/interface/isacfix.h b/webrtc/modules/audio_coding/codecs/isac/fix/interface/isacfix.h
index eec4a39..013ab7f 100644
--- a/webrtc/modules/audio_coding/codecs/isac/fix/interface/isacfix.h
+++ b/webrtc/modules/audio_coding/codecs/isac/fix/interface/isacfix.h
@@ -174,14 +174,9 @@
    *
    * Input:
    *  - ISAC_main_inst : ISAC instance.
-   *
-   * Return value
-   *       :  0 - Ok
-   *         -1 - Error
    */
 
-  int16_t WebRtcIsacfix_DecoderInit(ISACFIX_MainStruct *ISAC_main_inst);
-
+  void WebRtcIsacfix_DecoderInit(ISACFIX_MainStruct* ISAC_main_inst);
 
   /****************************************************************************
    * WebRtcIsacfix_UpdateBwEstimate1(...)
diff --git a/webrtc/modules/audio_coding/codecs/isac/fix/source/isacfix.c b/webrtc/modules/audio_coding/codecs/isac/fix/source/isacfix.c
index 4a663d1..21911dd 100644
--- a/webrtc/modules/audio_coding/codecs/isac/fix/source/isacfix.c
+++ b/webrtc/modules/audio_coding/codecs/isac/fix/source/isacfix.c
@@ -568,13 +568,9 @@
  *
  * Input:
  *      - ISAC_main_inst    : ISAC instance.
- *
- * Return value
- *                          :  0 - Ok
- *                            -1 - Error
  */
 
-int16_t WebRtcIsacfix_DecoderInit(ISACFIX_MainStruct *ISAC_main_inst)
+void WebRtcIsacfix_DecoderInit(ISACFIX_MainStruct *ISAC_main_inst)
 {
   ISACFIX_SubStruct *ISAC_inst;
 
@@ -597,8 +593,6 @@
 #ifdef WEBRTC_ISAC_FIX_NB_CALLS_ENABLED
   WebRtcIsacfix_InitPreFilterbank(&ISAC_inst->ISACdec_obj.decimatorstr_obj);
 #endif
-
-  return 0;
 }
 
 
diff --git a/webrtc/modules/audio_coding/codecs/isac/fix/test/isac_speed_test.cc b/webrtc/modules/audio_coding/codecs/isac/fix/test/isac_speed_test.cc
index fc7588d..adee337 100644
--- a/webrtc/modules/audio_coding/codecs/isac/fix/test/isac_speed_test.cc
+++ b/webrtc/modules/audio_coding/codecs/isac/fix/test/isac_speed_test.cc
@@ -48,7 +48,7 @@
   // Create encoder memory.
   EXPECT_EQ(0, WebRtcIsacfix_Create(&ISACFIX_main_inst_));
   EXPECT_EQ(0, WebRtcIsacfix_EncoderInit(ISACFIX_main_inst_, 1));
-  EXPECT_EQ(0, WebRtcIsacfix_DecoderInit(ISACFIX_main_inst_));
+  WebRtcIsacfix_DecoderInit(ISACFIX_main_inst_);
   // Set bitrate and block length.
   EXPECT_EQ(0, WebRtcIsacfix_Control(ISACFIX_main_inst_, bit_rate_,
                                      block_duration_ms_));
diff --git a/webrtc/modules/audio_coding/codecs/isac/fix/test/kenny.cc b/webrtc/modules/audio_coding/codecs/isac/fix/test/kenny.cc
index 6a947c8..d0f508f 100644
--- a/webrtc/modules/audio_coding/codecs/isac/fix/test/kenny.cc
+++ b/webrtc/modules/audio_coding/codecs/isac/fix/test/kenny.cc
@@ -539,12 +539,7 @@
         printf("\n\n Error in encoderinit: %d.\n\n", errtype);
       }
 
-      err = WebRtcIsacfix_DecoderInit(ISAC_main_inst);
-      /* Error check */
-      if (err < 0) {
-        errtype=WebRtcIsacfix_GetErrorCode(ISAC_main_inst);
-        printf("\n\n Error in decoderinit: %d.\n\n", errtype);
-      }
+      WebRtcIsacfix_DecoderInit(ISAC_main_inst);
     }
 
 
diff --git a/webrtc/modules/audio_coding/codecs/isac/main/interface/audio_encoder_isac.h b/webrtc/modules/audio_coding/codecs/isac/main/interface/audio_encoder_isac.h
index 1bfd149..58abbdf 100644
--- a/webrtc/modules/audio_coding/codecs/isac/main/interface/audio_encoder_isac.h
+++ b/webrtc/modules/audio_coding/codecs/isac/main/interface/audio_encoder_isac.h
@@ -50,8 +50,8 @@
     return WebRtcIsac_DecodePlc(inst, decoded, num_lost_frames);
   }
 
-  static inline int16_t DecoderInit(instance_type* inst) {
-    return WebRtcIsac_DecoderInit(inst);
+  static inline void DecoderInit(instance_type* inst) {
+    WebRtcIsac_DecoderInit(inst);
   }
   static inline int Encode(instance_type* inst,
                            const int16_t* speech_in,
diff --git a/webrtc/modules/audio_coding/codecs/isac/main/interface/isac.h b/webrtc/modules/audio_coding/codecs/isac/main/interface/isac.h
index 0597de8..1f5aeb3 100644
--- a/webrtc/modules/audio_coding/codecs/isac/main/interface/isac.h
+++ b/webrtc/modules/audio_coding/codecs/isac/main/interface/isac.h
@@ -157,15 +157,9 @@
    *
    * Input:
    *        - ISAC_main_inst    : ISAC instance.
-   *
-   * Return value
-   *                            : 0 - Ok
-   *                             -1 - Error
    */
 
-  int16_t WebRtcIsac_DecoderInit(
-      ISACStruct* ISAC_main_inst);
-
+  void WebRtcIsac_DecoderInit(ISACStruct* ISAC_main_inst);
 
   /******************************************************************************
    * WebRtcIsac_UpdateBwEstimate(...)
diff --git a/webrtc/modules/audio_coding/codecs/isac/main/source/isac.c b/webrtc/modules/audio_coding/codecs/isac/main/source/isac.c
index 190277e..0a5f75a 100644
--- a/webrtc/modules/audio_coding/codecs/isac/main/source/isac.c
+++ b/webrtc/modules/audio_coding/codecs/isac/main/source/isac.c
@@ -924,12 +924,8 @@
  *
  * Input:
  *        - ISAC_main_inst    : ISAC instance.
- *
- * Return value
- *                            :  0 - Ok
- *                              -1 - Error
  */
-static int16_t DecoderInitLb(ISACLBStruct* instISAC) {
+static void DecoderInitLb(ISACLBStruct* instISAC) {
   int i;
   /* Initialize stream vector to zero. */
   for (i = 0; i < STREAM_SIZE_MAX_60; i++) {
@@ -940,10 +936,9 @@
   WebRtcIsac_InitPostFilterbank(
     &instISAC->ISACdecLB_obj.postfiltbankstr_obj);
   WebRtcIsac_InitPitchFilter(&instISAC->ISACdecLB_obj.pitchfiltstr_obj);
-  return 0;
 }
 
-static int16_t DecoderInitUb(ISACUBStruct* instISAC) {
+static void DecoderInitUb(ISACUBStruct* instISAC) {
   int i;
   /* Init stream vector to zero */
   for (i = 0; i < STREAM_SIZE_MAX_60; i++) {
@@ -953,24 +948,18 @@
   WebRtcIsac_InitMasking(&instISAC->ISACdecUB_obj.maskfiltstr_obj);
   WebRtcIsac_InitPostFilterbank(
     &instISAC->ISACdecUB_obj.postfiltbankstr_obj);
-  return (0);
 }
 
-int16_t WebRtcIsac_DecoderInit(ISACStruct* ISAC_main_inst) {
+void WebRtcIsac_DecoderInit(ISACStruct* ISAC_main_inst) {
   ISACMainStruct* instISAC = (ISACMainStruct*)ISAC_main_inst;
 
-  if (DecoderInitLb(&instISAC->instLB) < 0) {
-    return -1;
-  }
+  DecoderInitLb(&instISAC->instLB);
   if (instISAC->decoderSamplingRateKHz == kIsacSuperWideband) {
     memset(instISAC->synthesisFBState1, 0,
            FB_STATE_SIZE_WORD32 * sizeof(int32_t));
     memset(instISAC->synthesisFBState2, 0,
            FB_STATE_SIZE_WORD32 * sizeof(int32_t));
-
-    if (DecoderInitUb(&(instISAC->instUB)) < 0) {
-      return -1;
-    }
+    DecoderInitUb(&(instISAC->instUB));
   }
   if ((instISAC->initFlag & BIT_MASK_ENC_INIT) != BIT_MASK_ENC_INIT) {
     WebRtcIsac_InitBandwidthEstimator(&instISAC->bwestimator_obj,
@@ -979,7 +968,6 @@
   }
   instISAC->initFlag |= BIT_MASK_DEC_INIT;
   instISAC->resetFlag_8kHz = 0;
-  return 0;
 }
 
 
@@ -2353,9 +2341,7 @@
       memset(instISAC->synthesisFBState2, 0,
              FB_STATE_SIZE_WORD32 * sizeof(int32_t));
 
-      if (DecoderInitUb(&(instISAC->instUB)) < 0) {
-        return -1;
-      }
+      DecoderInitUb(&instISAC->instUB);
   }
   instISAC->decoderSamplingRateKHz = decoder_operational_rate;
   return 0;
diff --git a/webrtc/modules/audio_coding/codecs/isac/main/test/ReleaseTest-API/ReleaseTest-API.cc b/webrtc/modules/audio_coding/codecs/isac/main/test/ReleaseTest-API/ReleaseTest-API.cc
index d385ff4..2e5badd 100644
--- a/webrtc/modules/audio_coding/codecs/isac/main/test/ReleaseTest-API/ReleaseTest-API.cc
+++ b/webrtc/modules/audio_coding/codecs/isac/main/test/ReleaseTest-API/ReleaseTest-API.cc
@@ -499,13 +499,8 @@
       return 0;
     }
   }
-  if (testNum != 2) {
-    if (WebRtcIsac_DecoderInit(ISAC_main_inst) < 0) {
-      printf("Error could not initialize the decoder \n");
-      cout << flush;
-      return 0;
-    }
-  }
+  if (testNum != 2)
+    WebRtcIsac_DecoderInit(ISAC_main_inst);
   if (CodingMode == 1) {
     err = WebRtcIsac_Control(ISAC_main_inst, bottleneck, framesize);
     if (err < 0) {
@@ -570,13 +565,7 @@
         cout << flush;
       }
 
-      err = WebRtcIsac_DecoderInit(ISAC_main_inst);
-      /* Error check */
-      if (err < 0) {
-        errtype = WebRtcIsac_GetErrorCode(ISAC_main_inst);
-        printf("\n\n Error in decoderinit: %d.\n\n", errtype);
-        cout << flush;
-      }
+      WebRtcIsac_DecoderInit(ISAC_main_inst);
     }
 
     cur_framesmpls = 0;
diff --git a/webrtc/modules/audio_coding/codecs/isac/main/test/SwitchingSampRate/SwitchingSampRate.cc b/webrtc/modules/audio_coding/codecs/isac/main/test/SwitchingSampRate/SwitchingSampRate.cc
index 08061ac..a53e7bd 100644
--- a/webrtc/modules/audio_coding/codecs/isac/main/test/SwitchingSampRate/SwitchingSampRate.cc
+++ b/webrtc/modules/audio_coding/codecs/isac/main/test/SwitchingSampRate/SwitchingSampRate.cc
@@ -166,13 +166,7 @@
       return -1;
     }
 
-    // Initialize Decoder
-    if(WebRtcIsac_DecoderInit(codecInstance[clientCntr]) < 0)
-    {
-      printf("Could not initialize decoder of client %d\n",
-             clientCntr + 1);
-      return -1;
-    }
+    WebRtcIsac_DecoderInit(codecInstance[clientCntr]);
 
     // setup Rate if in Instantaneous mode
     if(codingMode != 0)
diff --git a/webrtc/modules/audio_coding/codecs/isac/main/test/simpleKenny.c b/webrtc/modules/audio_coding/codecs/isac/main/test/simpleKenny.c
index 2f44ca8..e8116ff 100644
--- a/webrtc/modules/audio_coding/codecs/isac/main/test/simpleKenny.c
+++ b/webrtc/modules/audio_coding/codecs/isac/main/test/simpleKenny.c
@@ -253,10 +253,7 @@
     printf("cannot initialize encoder\n");
     return -1;
   }
-  if (WebRtcIsac_DecoderInit(ISAC_main_inst) < 0) {
-    printf("cannot initialize decoder\n");
-    return -1;
-  }
+  WebRtcIsac_DecoderInit(ISAC_main_inst);
 
   // {
   //   int32_t b1, b2;
diff --git a/webrtc/modules/audio_coding/codecs/isac/unittest.cc b/webrtc/modules/audio_coding/codecs/isac/unittest.cc
index d05ffa6..673d290 100644
--- a/webrtc/modules/audio_coding/codecs/isac/unittest.cc
+++ b/webrtc/modules/audio_coding/codecs/isac/unittest.cc
@@ -111,7 +111,7 @@
   typename T::instance_type* encdec;
   ASSERT_EQ(0, T::Create(&encdec));
   ASSERT_EQ(0, T::EncoderInit(encdec, adaptive ? 0 : 1));
-  ASSERT_EQ(0, T::DecoderInit(encdec));
+  T::DecoderInit(encdec);
   ASSERT_EQ(0, T::SetEncSampRate(encdec, sample_rate_hz));
   if (adaptive)
     ASSERT_EQ(0, T::ControlBwe(encdec, bit_rate, frame_size_ms, false));
@@ -129,7 +129,7 @@
     ASSERT_EQ(0, T::Control(enc, bit_rate, frame_size_ms));
   typename T::instance_type* dec;
   ASSERT_EQ(0, T::Create(&dec));
-  ASSERT_EQ(0, T::DecoderInit(dec));
+  T::DecoderInit(dec);
   T::SetInitialBweBottleneck(dec, bit_rate);
   T::SetEncSampRateInDecoder(dec, sample_rate_hz);