Add stats for average QP per frame for VP8 (for received video streams).

webrtc/video/video_receive_stream.cc

Index: webrtc/video/video_receive_stream.cc
diff --git a/webrtc/video/video_receive_stream.cc b/webrtc/video/video_receive_stream.cc
index 1be63e07d1e166f039e50e777489821d52b6cc59..3818b39984c5c6c29096bb14b67ca113305528cb 100644
--- a/webrtc/video/video_receive_stream.cc
+++ b/webrtc/video/video_receive_stream.cc
@@ -19,7 +19,6 @@
 #include "webrtc/system_wrappers/interface/clock.h"
 #include "webrtc/system_wrappers/interface/logging.h"
 #include "webrtc/video/receive_statistics_proxy.h"
-#include "webrtc/video_encoder.h"
 #include "webrtc/video_receive_stream.h"
 
 namespace webrtc {
@@ -245,8 +244,7 @@ VideoReceiveStream::VideoReceiveStream(int num_cpu_cores,
   incoming_video_stream_->SetExternalCallback(this);
   vie_channel_->SetIncomingVideoStream(incoming_video_stream_.get());
 
-  if (config.pre_decode_callback)
-    vie_channel_->RegisterPreDecodeImageCallback(&encoded_frame_proxy_);
+  vie_channel_->RegisterPreDecodeImageCallback(this);
   vie_channel_->RegisterPreRenderCallback(this);
 }
 
@@ -324,6 +322,18 @@ int VideoReceiveStream::RenderFrame(const uint32_t /*stream_id*/,
   return 0;
 }
 
+int32_t VideoReceiveStream::Encoded(

[stefan-webrtc, 2015/10/15 12:49:35]

I find it a bit strange that we use an encode callback on the receiver. Should
we at least move the callback class to somewhere different than video_encoder.h?
Or maybe just create a different callback for this purpose?

[åsapersson, 2015/10/16 09:33:59]

Do this in a separate CL? Added comment.

[stefan-webrtc, 2015/10/16 09:40:10]

Sounds good.

+    const EncodedImage& encoded_image,
+    const CodecSpecificInfo* codec_specific_info,
+    const RTPFragmentationHeader* fragmentation) {
+  stats_proxy_->Encoded(encoded_image, codec_specific_info);
+  if (config_.pre_decode_callback) {
+    encoded_frame_proxy_.Encoded(
+        encoded_image, codec_specific_info, fragmentation);
+  }
+  return 0;
+}
+
 void VideoReceiveStream::SignalNetworkState(NetworkState state) {
   if (state == kNetworkUp)
     SetRtcpMode(config_.rtp.rtcp_mode);