Reland of Deprecate VCMPacketizationCallback::SendData and use EncodedImageCallback instead. (patchset #1 id:1 of https://codereview.webrtc.org/1903193002/ )

Reason for revert:
A fix is being prepared downstream so this can now go in.

Original issue's description:
> Revert of Deprecate VCMPacketizationCallback::SendData and use EncodedImageCallback instead. (patchset #5 id:80001 of https://codereview.webrtc.org/1897233002/ )
>
> Reason for revert:
> API changes broke downstream.
>
> Original issue's description:
> > Deprecate VCMPacketizationCallback::SendData and use EncodedImageCallback instead.
> > EncodedImageCallback is used by all encoder implementations and seems to be what we should try to use in the transport.
> > EncodedImageCallback can of course be cleaned up in the future.
> >
> > This moves creation of RTPVideoHeader from the GenericEncoder to the PayLoadRouter.
> >
> > BUG=webrtc::5687
> >
> > Committed: https://crrev.com/f5d55aaecdc39e9cc66eb6e87614f04afe28f6eb
> > Cr-Commit-Position: refs/heads/master@{#12436}
>
> TBR=stefan@webrtc.org,pbos@webrtc.org,perkj@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:5687
>
> Committed: https://crrev.com/a261e6136655af33f283eda8e60a6dd93dd746a4
> Cr-Commit-Position: refs/heads/master@{#12441}

TBR=stefan@webrtc.org,pbos@webrtc.org,perkj@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:5687

Review URL: https://codereview.webrtc.org/1905583002

Cr-Commit-Position: refs/heads/master@{#12442}
diff --git a/webrtc/modules/video_coding/codec_database.cc b/webrtc/modules/video_coding/codec_database.cc
index a5a7c1e..1baa414 100644
--- a/webrtc/modules/video_coding/codec_database.cc
+++ b/webrtc/modules/video_coding/codec_database.cc
@@ -238,7 +238,6 @@
   memcpy(&send_codec_, &new_send_codec, sizeof(send_codec_));
 
   if (!reset_required) {
-    encoded_frame_callback_->SetPayloadType(send_codec_.plType);
     return true;
   }
 
@@ -249,7 +248,6 @@
   ptr_encoder_.reset(
       new VCMGenericEncoder(external_encoder_, encoder_rate_observer_,
                             encoded_frame_callback_, internal_source_));
-  encoded_frame_callback_->SetPayloadType(send_codec_.plType);
   encoded_frame_callback_->SetInternalSource(internal_source_);
   if (ptr_encoder_->InitEncode(&send_codec_, number_of_cores_,
                                max_payload_size_) < 0) {
diff --git a/webrtc/modules/video_coding/generic_encoder.cc b/webrtc/modules/video_coding/generic_encoder.cc
index 9a3d2ff..321deb0 100644
--- a/webrtc/modules/video_coding/generic_encoder.cc
+++ b/webrtc/modules/video_coding/generic_encoder.cc
@@ -21,76 +21,6 @@
 #include "webrtc/system_wrappers/include/critical_section_wrapper.h"
 
 namespace webrtc {
-namespace {
-// Map information from info into rtp. If no relevant information is found
-// in info, rtp is set to NULL.
-void CopyCodecSpecific(const CodecSpecificInfo* info, RTPVideoHeader* rtp) {
-  RTC_DCHECK(info);
-  switch (info->codecType) {
-    case kVideoCodecVP8: {
-      rtp->codec = kRtpVideoVp8;
-      rtp->codecHeader.VP8.InitRTPVideoHeaderVP8();
-      rtp->codecHeader.VP8.pictureId = info->codecSpecific.VP8.pictureId;
-      rtp->codecHeader.VP8.nonReference = info->codecSpecific.VP8.nonReference;
-      rtp->codecHeader.VP8.temporalIdx = info->codecSpecific.VP8.temporalIdx;
-      rtp->codecHeader.VP8.layerSync = info->codecSpecific.VP8.layerSync;
-      rtp->codecHeader.VP8.tl0PicIdx = info->codecSpecific.VP8.tl0PicIdx;
-      rtp->codecHeader.VP8.keyIdx = info->codecSpecific.VP8.keyIdx;
-      rtp->simulcastIdx = info->codecSpecific.VP8.simulcastIdx;
-      return;
-    }
-    case kVideoCodecVP9: {
-      rtp->codec = kRtpVideoVp9;
-      rtp->codecHeader.VP9.InitRTPVideoHeaderVP9();
-      rtp->codecHeader.VP9.inter_pic_predicted =
-          info->codecSpecific.VP9.inter_pic_predicted;
-      rtp->codecHeader.VP9.flexible_mode =
-          info->codecSpecific.VP9.flexible_mode;
-      rtp->codecHeader.VP9.ss_data_available =
-          info->codecSpecific.VP9.ss_data_available;
-      rtp->codecHeader.VP9.picture_id = info->codecSpecific.VP9.picture_id;
-      rtp->codecHeader.VP9.tl0_pic_idx = info->codecSpecific.VP9.tl0_pic_idx;
-      rtp->codecHeader.VP9.temporal_idx = info->codecSpecific.VP9.temporal_idx;
-      rtp->codecHeader.VP9.spatial_idx = info->codecSpecific.VP9.spatial_idx;
-      rtp->codecHeader.VP9.temporal_up_switch =
-          info->codecSpecific.VP9.temporal_up_switch;
-      rtp->codecHeader.VP9.inter_layer_predicted =
-          info->codecSpecific.VP9.inter_layer_predicted;
-      rtp->codecHeader.VP9.gof_idx = info->codecSpecific.VP9.gof_idx;
-      rtp->codecHeader.VP9.num_spatial_layers =
-          info->codecSpecific.VP9.num_spatial_layers;
-
-      if (info->codecSpecific.VP9.ss_data_available) {
-        rtp->codecHeader.VP9.spatial_layer_resolution_present =
-            info->codecSpecific.VP9.spatial_layer_resolution_present;
-        if (info->codecSpecific.VP9.spatial_layer_resolution_present) {
-          for (size_t i = 0; i < info->codecSpecific.VP9.num_spatial_layers;
-               ++i) {
-            rtp->codecHeader.VP9.width[i] = info->codecSpecific.VP9.width[i];
-            rtp->codecHeader.VP9.height[i] = info->codecSpecific.VP9.height[i];
-          }
-        }
-        rtp->codecHeader.VP9.gof.CopyGofInfoVP9(info->codecSpecific.VP9.gof);
-      }
-
-      rtp->codecHeader.VP9.num_ref_pics = info->codecSpecific.VP9.num_ref_pics;
-      for (int i = 0; i < info->codecSpecific.VP9.num_ref_pics; ++i)
-        rtp->codecHeader.VP9.pid_diff[i] = info->codecSpecific.VP9.p_diff[i];
-      return;
-    }
-    case kVideoCodecH264:
-      rtp->codec = kRtpVideoH264;
-      return;
-    case kVideoCodecGeneric:
-      rtp->codec = kRtpVideoGeneric;
-      rtp->simulcastIdx = info->codecSpecific.generic.simulcast_idx;
-      return;
-    default:
-      return;
-  }
-}
-}  // namespace
-
 VCMGenericEncoder::VCMGenericEncoder(
     VideoEncoder* encoder,
     VideoEncoderRateObserver* rate_observer,
@@ -216,7 +146,6 @@
     EncodedImageCallback* post_encode_callback)
     : send_callback_(),
       media_opt_(nullptr),
-      payload_type_(0),
       internal_source_(false),
       post_encode_callback_(post_encode_callback) {}
 
@@ -234,19 +163,8 @@
     const RTPFragmentationHeader* fragmentation_header) {
   TRACE_EVENT_INSTANT1("webrtc", "VCMEncodedFrameCallback::Encoded",
                        "timestamp", encoded_image._timeStamp);
-  post_encode_callback_->Encoded(encoded_image, nullptr, nullptr);
-
-  if (send_callback_ == nullptr)
-    return VCM_UNINITIALIZED;
-
-  RTPVideoHeader rtp_video_header;
-  memset(&rtp_video_header, 0, sizeof(RTPVideoHeader));
-  if (codec_specific)
-    CopyCodecSpecific(codec_specific, &rtp_video_header);
-  rtp_video_header.rotation = encoded_image.rotation_;
-
-  int32_t ret_val = send_callback_->SendData(
-      payload_type_, encoded_image, fragmentation_header, &rtp_video_header);
+  int ret_val = post_encode_callback_->Encoded(encoded_image, codec_specific,
+                                               fragmentation_header);
   if (ret_val < 0)
     return ret_val;
 
diff --git a/webrtc/modules/video_coding/generic_encoder.h b/webrtc/modules/video_coding/generic_encoder.h
index a39ffd7..89d07e2 100644
--- a/webrtc/modules/video_coding/generic_encoder.h
+++ b/webrtc/modules/video_coding/generic_encoder.h
@@ -44,7 +44,6 @@
                   const RTPFragmentationHeader* fragmentation_header) override;
   int32_t SetTransportCallback(VCMPacketizationCallback* transport);
   void SetMediaOpt(media_optimization::MediaOptimization* media_opt);
-  void SetPayloadType(uint8_t payload_type) { payload_type_ = payload_type; }
   void SetInternalSource(bool internal_source) {
     internal_source_ = internal_source;
   }
@@ -54,7 +53,6 @@
  private:
   VCMPacketizationCallback* send_callback_;
   media_optimization::MediaOptimization* media_opt_;
-  uint8_t payload_type_;
   bool internal_source_;
 
   EncodedImageCallback* post_encode_callback_;
diff --git a/webrtc/modules/video_coding/include/video_coding_defines.h b/webrtc/modules/video_coding/include/video_coding_defines.h
index 4fe8c79..231e24f 100644
--- a/webrtc/modules/video_coding/include/video_coding_defines.h
+++ b/webrtc/modules/video_coding/include/video_coding_defines.h
@@ -57,13 +57,11 @@
 };
 
 // Callback class used for sending data ready to be packetized
+// Deprecated.
+// TODO(perkj): Remove once OnEncoderImplementationName is not used.
 class VCMPacketizationCallback {
  public:
-  virtual int32_t SendData(uint8_t payloadType,
-                           const EncodedImage& encoded_image,
-                           const RTPFragmentationHeader* fragmentationHeader,
-                           const RTPVideoHeader* rtpVideoHdr) = 0;
-
+  // TODO(perkj): Refactor this. It does not belong in VCMPacketizationCallback.
   virtual void OnEncoderImplementationName(const char* implementation_name) {}
 
  protected:
diff --git a/webrtc/modules/video_coding/utility/ivf_file_writer.cc b/webrtc/modules/video_coding/utility/ivf_file_writer.cc
index 8161a8b..a3b680d 100644
--- a/webrtc/modules/video_coding/utility/ivf_file_writer.cc
+++ b/webrtc/modules/video_coding/utility/ivf_file_writer.cc
@@ -18,7 +18,7 @@
 
 IvfFileWriter::IvfFileWriter(const std::string& file_name,
                              std::unique_ptr<FileWrapper> file,
-                             RtpVideoCodecTypes codec_type)
+                             VideoCodecType codec_type)
     : codec_type_(codec_type),
       num_frames_(0),
       width_(0),
@@ -34,9 +34,8 @@
 
 const size_t kIvfHeaderSize = 32;
 
-std::unique_ptr<IvfFileWriter> IvfFileWriter::Open(
-    const std::string& file_name,
-    RtpVideoCodecTypes codec_type) {
+std::unique_ptr<IvfFileWriter> IvfFileWriter::Open(const std::string& file_name,
+                                                   VideoCodecType codec_type) {
   std::unique_ptr<IvfFileWriter> file_writer;
   std::unique_ptr<FileWrapper> file(FileWrapper::Create());
   if (file->OpenFile(file_name.c_str(), false) != 0)
@@ -65,19 +64,19 @@
   ByteWriter<uint16_t>::WriteLittleEndian(&ivf_header[6], 32);  // Header size.
 
   switch (codec_type_) {
-    case kRtpVideoVp8:
+    case kVideoCodecVP8:
       ivf_header[8] = 'V';
       ivf_header[9] = 'P';
       ivf_header[10] = '8';
       ivf_header[11] = '0';
       break;
-    case kRtpVideoVp9:
+    case kVideoCodecVP9:
       ivf_header[8] = 'V';
       ivf_header[9] = 'P';
       ivf_header[10] = '9';
       ivf_header[11] = '0';
       break;
-    case kRtpVideoH264:
+    case kVideoCodecH264:
       ivf_header[8] = 'H';
       ivf_header[9] = '2';
       ivf_header[10] = '6';
diff --git a/webrtc/modules/video_coding/utility/ivf_file_writer.h b/webrtc/modules/video_coding/utility/ivf_file_writer.h
index 61d1829..25d68a2 100644
--- a/webrtc/modules/video_coding/utility/ivf_file_writer.h
+++ b/webrtc/modules/video_coding/utility/ivf_file_writer.h
@@ -27,18 +27,18 @@
   ~IvfFileWriter();
 
   static std::unique_ptr<IvfFileWriter> Open(const std::string& file_name,
-                                             RtpVideoCodecTypes codec_type);
+                                             VideoCodecType codec_type);
   bool WriteFrame(const EncodedImage& encoded_image);
   bool Close();
 
  private:
   IvfFileWriter(const std::string& path_name,
                 std::unique_ptr<FileWrapper> file,
-                RtpVideoCodecTypes codec_type);
+                VideoCodecType codec_type);
   bool WriteHeader();
   bool InitFromFirstFrame(const EncodedImage& encoded_image);
 
-  const RtpVideoCodecTypes codec_type_;
+  const VideoCodecType codec_type_;
   size_t num_frames_;
   uint16_t width_;
   uint16_t height_;
diff --git a/webrtc/modules/video_coding/utility/ivf_file_writer_unittest.cc b/webrtc/modules/video_coding/utility/ivf_file_writer_unittest.cc
index bdd74a4..577af41 100644
--- a/webrtc/modules/video_coding/utility/ivf_file_writer_unittest.cc
+++ b/webrtc/modules/video_coding/utility/ivf_file_writer_unittest.cc
@@ -103,7 +103,7 @@
     }
   }
 
-  void RunBasicFileStructureTest(RtpVideoCodecTypes codec_type,
+  void RunBasicFileStructureTest(VideoCodecType codec_type,
                                  const uint8_t fourcc[4],
                                  bool use_capture_tims_ms) {
     file_writer_ = IvfFileWriter::Open(file_name_, codec_type);
@@ -135,7 +135,7 @@
 };
 
 TEST_F(IvfFileWriterTest, RemovesUnusedFile) {
-  file_writer_ = IvfFileWriter::Open(file_name_, kRtpVideoVp8);
+  file_writer_ = IvfFileWriter::Open(file_name_, kVideoCodecVP8);
   ASSERT_TRUE(file_writer_.get() != nullptr);
   EXPECT_TRUE(FileExists());
   EXPECT_TRUE(file_writer_->Close());
@@ -145,32 +145,32 @@
 
 TEST_F(IvfFileWriterTest, WritesBasicVP8FileNtpTimestamp) {
   const uint8_t fourcc[4] = {'V', 'P', '8', '0'};
-  RunBasicFileStructureTest(kRtpVideoVp8, fourcc, false);
+  RunBasicFileStructureTest(kVideoCodecVP8, fourcc, false);
 }
 
 TEST_F(IvfFileWriterTest, WritesBasicVP8FileMsTimestamp) {
   const uint8_t fourcc[4] = {'V', 'P', '8', '0'};
-  RunBasicFileStructureTest(kRtpVideoVp8, fourcc, true);
+  RunBasicFileStructureTest(kVideoCodecVP8, fourcc, true);
 }
 
 TEST_F(IvfFileWriterTest, WritesBasicVP9FileNtpTimestamp) {
   const uint8_t fourcc[4] = {'V', 'P', '9', '0'};
-  RunBasicFileStructureTest(kRtpVideoVp9, fourcc, false);
+  RunBasicFileStructureTest(kVideoCodecVP9, fourcc, false);
 }
 
 TEST_F(IvfFileWriterTest, WritesBasicVP9FileMsTimestamp) {
   const uint8_t fourcc[4] = {'V', 'P', '9', '0'};
-  RunBasicFileStructureTest(kRtpVideoVp9, fourcc, true);
+  RunBasicFileStructureTest(kVideoCodecVP9, fourcc, true);
 }
 
 TEST_F(IvfFileWriterTest, WritesBasicH264FileNtpTimestamp) {
   const uint8_t fourcc[4] = {'H', '2', '6', '4'};
-  RunBasicFileStructureTest(kRtpVideoH264, fourcc, false);
+  RunBasicFileStructureTest(kVideoCodecH264, fourcc, false);
 }
 
 TEST_F(IvfFileWriterTest, WritesBasicH264FileMsTimestamp) {
   const uint8_t fourcc[4] = {'H', '2', '6', '4'};
-  RunBasicFileStructureTest(kRtpVideoH264, fourcc, true);
+  RunBasicFileStructureTest(kVideoCodecH264, fourcc, true);
 }
 
 }  // namespace webrtc
diff --git a/webrtc/modules/video_coding/video_coding_impl.cc b/webrtc/modules/video_coding/video_coding_impl.cc
index ee03753..a9a4724 100644
--- a/webrtc/modules/video_coding/video_coding_impl.cc
+++ b/webrtc/modules/video_coding/video_coding_impl.cc
@@ -54,7 +54,6 @@
     callback_ = callback;
   }
 
-  // TODO(andresp): Change to void as return value is ignored.
   virtual int32_t Encoded(const EncodedImage& encoded_image,
                           const CodecSpecificInfo* codec_specific_info,
                           const RTPFragmentationHeader* fragmentation) {
diff --git a/webrtc/modules/video_coding/video_coding_impl.h b/webrtc/modules/video_coding/video_coding_impl.h
index 40352b0..e9d7abc 100644
--- a/webrtc/modules/video_coding/video_coding_impl.h
+++ b/webrtc/modules/video_coding/video_coding_impl.h
@@ -79,6 +79,8 @@
                                uint8_t lossRate,
                                int64_t rtt);
 
+  // Deprecated. Use |post_encode_callback| instead.
+  // TODO(perkj): Remove once |OnEncoderImplementationName| is not used.
   int32_t RegisterTransportCallback(VCMPacketizationCallback* transport);
   int32_t RegisterSendStatisticsCallback(VCMSendStatisticsCallback* sendStats);
   int32_t RegisterProtectionCallback(VCMProtectionCallback* protection);
diff --git a/webrtc/modules/video_coding/video_sender_unittest.cc b/webrtc/modules/video_coding/video_sender_unittest.cc
index e15e872..50283fc 100644
--- a/webrtc/modules/video_coding/video_sender_unittest.cc
+++ b/webrtc/modules/video_coding/video_sender_unittest.cc
@@ -86,19 +86,19 @@
   std::unique_ptr<VideoFrame> frame_;
 };
 
-class PacketizationCallback : public VCMPacketizationCallback {
+class EncodedImageCallbackImpl : public EncodedImageCallback {
  public:
-  explicit PacketizationCallback(Clock* clock)
+  explicit EncodedImageCallbackImpl(Clock* clock)
       : clock_(clock), start_time_ms_(clock_->TimeInMilliseconds()) {}
 
-  virtual ~PacketizationCallback() {}
+  virtual ~EncodedImageCallbackImpl() {}
 
-  int32_t SendData(uint8_t payload_type,
-                   const EncodedImage& encoded_image,
-                   const RTPFragmentationHeader* fragmentation_header,
-                   const RTPVideoHeader* rtp_video_header) override {
-    assert(rtp_video_header);
-    frame_data_.push_back(FrameData(encoded_image._length, *rtp_video_header));
+  int32_t Encoded(const EncodedImage& encoded_image,
+                  const CodecSpecificInfo* codec_specific_info,
+                  const RTPFragmentationHeader* fragmentation) override {
+    assert(codec_specific_info);
+    frame_data_.push_back(
+        FrameData(encoded_image._length, *codec_specific_info));
     return 0;
   }
 
@@ -130,11 +130,12 @@
   struct FrameData {
     FrameData() {}
 
-    FrameData(size_t payload_size, const RTPVideoHeader& rtp_video_header)
-        : payload_size(payload_size), rtp_video_header(rtp_video_header) {}
+    FrameData(size_t payload_size, const CodecSpecificInfo& codec_specific_info)
+        : payload_size(payload_size),
+          codec_specific_info(codec_specific_info) {}
 
     size_t payload_size;
-    RTPVideoHeader rtp_video_header;
+    CodecSpecificInfo codec_specific_info;
   };
 
   int64_t interval_ms() {
@@ -146,9 +147,9 @@
   int CountFramesWithinTemporalLayer(int temporal_layer) {
     int frames = 0;
     for (size_t i = 0; i < frame_data_.size(); ++i) {
-      EXPECT_EQ(kRtpVideoVp8, frame_data_[i].rtp_video_header.codec);
+      EXPECT_EQ(kVideoCodecVP8, frame_data_[i].codec_specific_info.codecType);
       const uint8_t temporal_idx =
-          frame_data_[i].rtp_video_header.codecHeader.VP8.temporalIdx;
+          frame_data_[i].codec_specific_info.codecSpecific.VP8.temporalIdx;
       if (temporal_idx <= temporal_layer || temporal_idx == kNoTemporalIdx)
         frames++;
     }
@@ -158,9 +159,9 @@
   size_t SumPayloadBytesWithinTemporalLayer(int temporal_layer) {
     size_t payload_size = 0;
     for (size_t i = 0; i < frame_data_.size(); ++i) {
-      EXPECT_EQ(kRtpVideoVp8, frame_data_[i].rtp_video_header.codec);
+      EXPECT_EQ(kVideoCodecVP8, frame_data_[i].codec_specific_info.codecType);
       const uint8_t temporal_idx =
-          frame_data_[i].rtp_video_header.codecHeader.VP8.temporalIdx;
+          frame_data_[i].codec_specific_info.codecSpecific.VP8.temporalIdx;
       if (temporal_idx <= temporal_layer || temporal_idx == kNoTemporalIdx)
         payload_size += frame_data_[i].payload_size;
     }
@@ -176,12 +177,11 @@
  protected:
   // Note: simulated clock starts at 1 seconds, since parts of webrtc use 0 as
   // a special case (e.g. frame rate in media optimization).
-  TestVideoSender() : clock_(1000), packetization_callback_(&clock_) {}
+  TestVideoSender() : clock_(1000), encoded_frame_callback_(&clock_) {}
 
   void SetUp() override {
     sender_.reset(
-        new VideoSender(&clock_, &post_encode_callback_, nullptr, nullptr));
-    EXPECT_EQ(0, sender_->RegisterTransportCallback(&packetization_callback_));
+        new VideoSender(&clock_, &encoded_frame_callback_, nullptr, nullptr));
   }
 
   void AddFrame() {
@@ -190,8 +190,7 @@
   }
 
   SimulatedClock clock_;
-  PacketizationCallback packetization_callback_;
-  MockEncodedImageCallback post_encode_callback_;
+  EncodedImageCallbackImpl encoded_frame_callback_;
   // Used by subclassing tests, need to outlive sender_.
   std::unique_ptr<VideoEncoder> encoder_;
   std::unique_ptr<VideoSender> sender_;
@@ -415,8 +414,6 @@
   void InsertFrames(float framerate, float seconds) {
     for (int i = 0; i < seconds * framerate; ++i) {
       clock_.AdvanceTimeMilliseconds(1000.0f / framerate);
-      EXPECT_CALL(post_encode_callback_, Encoded(_, NULL, NULL))
-          .WillOnce(Return(0));
       AddFrame();
       // SetChannelParameters needs to be called frequently to propagate
       // framerate from the media optimization into the encoder.
@@ -435,10 +432,10 @@
     // It appears that this 5 seconds simulation is needed to allow
     // bitrate and framerate to stabilize.
     InsertFrames(framerate, short_simulation_interval);
-    packetization_callback_.Reset();
+    encoded_frame_callback_.Reset();
 
     InsertFrames(framerate, long_simulation_interval);
-    return packetization_callback_.CalculateVp8StreamInfo();
+    return encoded_frame_callback_.CalculateVp8StreamInfo();
   }
 
  protected: