Add QP stats for received video streams to StatsReport.

talk/media/base/mediachannel.h

 /*
  * libjingle
  * Copyright 2004 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 843 matching lines @@
         framerate_output(0),
         framerate_render_input(0),
         framerate_render_output(0),
         decode_ms(0),
         max_decode_ms(0),
         jitter_buffer_ms(0),
         min_playout_delay_ms(0),
         render_delay_ms(0),
         target_delay_ms(0),
         current_delay_ms(0),
-        capture_start_ntp_time_ms(-1) {
+        capture_start_ntp_time_ms(-1),
+        qp(-1) {
   }
 
   std::vector<SsrcGroup> ssrc_groups;
   int packets_concealed;
   int firs_sent;
   int plis_sent;
   int nacks_sent;
   int frame_width;
   int frame_height;
   int framerate_rcvd;
@@ skipping 19 matching lines @@
   // Requested latency to account for rendering delay.
   int render_delay_ms;
   // Target overall delay: network+decode+render, accounting for
   // min_playout_delay_ms.
   int target_delay_ms;
   // Current overall delay, possibly ramping towards target_delay_ms.
   int current_delay_ms;
 
   // Estimated capture start time in NTP time in ms.
   int64_t capture_start_ntp_time_ms;
+  // Average codec quantizer value.
+  int qp;
 };
 
 struct DataSenderInfo : public MediaSenderInfo {
   DataSenderInfo()
       : ssrc(0) {
   }
 
   uint32_t ssrc;
 };
 
@@ skipping 334 matching lines @@
   // Signal when the media channel is ready to send the stream. Arguments are:
   //     writable(bool)
   sigslot::signal1<bool> SignalReadyToSend;
   // Signal for notifying that the remote side has closed the DataChannel.
   sigslot::signal1<uint32_t> SignalStreamClosedRemotely;
 };
 
 }  // namespace cricket
 
 #endif  // TALK_MEDIA_BASE_MEDIACHANNEL_H_