Add support for writing raw encoder output to .ivf files.

webrtc/modules/video_coding/generic_encoder.h

Index: webrtc/modules/video_coding/generic_encoder.h
diff --git a/webrtc/modules/video_coding/generic_encoder.h b/webrtc/modules/video_coding/generic_encoder.h
index e96d99578150f7b531445e14cb35f46995070801..438dd1ddf819e6ae5cfaff716a2da5fc3f6e7c2d 100644
--- a/webrtc/modules/video_coding/generic_encoder.h
+++ b/webrtc/modules/video_coding/generic_encoder.h
@@ -16,6 +16,7 @@
 
 #include "webrtc/modules/video_coding/include/video_codec_interface.h"
 #include "webrtc/modules/video_coding/include/video_coding_defines.h"
+#include "webrtc/modules/video_coding/utility/ivf_file_writer.h"
 
 #include "webrtc/base/criticalsection.h"
 
@@ -71,17 +72,22 @@ class VCMEncodedFrameCallback : public EncodedImageCallback {
         const char* encoder_implementation_name);
 
  private:
-    VCMPacketizationCallback* send_callback_;
-    media_optimization::MediaOptimization* _mediaOpt;
-    uint8_t _payloadType;
-    bool _internalSource;
-    VideoRotation _rotation;
+  friend class VCMGenericEncoder;
 
-    EncodedImageCallback* post_encode_callback_;
+  int GetLayer(const CodecSpecificInfo& codec_specific);
 
-#ifdef DEBUG_ENCODER_BIT_STREAM
-    FILE* _bitStreamAfterEncoder;
-#endif
+  static const bool kEnableFrameRecording = false;

[pbos-webrtc, 2016/04/04 11:22:23]

I think this should be plumbed further out through:

webrtc/video/vie_encoder.cc:411:int32_t ViEEncoder::SendData(const uint8_t
payload_type,

And that the file writing should be done there.

[sprang_webrtc, 2016/04/05 10:35:38]

Done.

+  static const int kMaxLayers = 3;
+  VideoCodecType codec_type_ = kVideoCodecVP8;
+  std::unique_ptr<IvfFileWriter> file_writers_[kMaxLayers];
+
+  VCMPacketizationCallback* send_callback_;
+  media_optimization::MediaOptimization* _mediaOpt;
+  uint8_t _payloadType;
+  bool _internalSource;
+  VideoRotation _rotation;
+
+  EncodedImageCallback* post_encode_callback_;
 };  // end of VCMEncodeFrameCallback class
 
 /******************************/