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

webrtc/video/receive_statistics_proxy.h

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 12 matching lines @@
 #include "webrtc/video_engine/report_block_stats.h"
 #include "webrtc/video_engine/vie_channel.h"
 #include "webrtc/video_receive_stream.h"
 #include "webrtc/video_renderer.h"
 
 namespace webrtc {
 
 class Clock;
 class ViECodec;
 class ViEDecoderObserver;
+struct CodecSpecificInfo;
 
 class ReceiveStatisticsProxy : public VCMReceiveStatisticsCallback,
                                public RtcpStatisticsCallback,
                                public RtcpPacketTypeCounterObserver,
                                public StreamDataCountersCallback {
  public:
   ReceiveStatisticsProxy(uint32_t ssrc, Clock* clock);
   virtual ~ReceiveStatisticsProxy();
 
   VideoReceiveStream::Stats GetStats() const;
 
   void OnDecodedFrame();
   void OnRenderedFrame(int width, int height);
   void OnIncomingPayloadType(int payload_type);
   void OnIncomingRate(unsigned int framerate, unsigned int bitrate_bps);
   void OnDecoderTiming(int decode_ms,
                        int max_decode_ms,
                        int current_delay_ms,
                        int target_delay_ms,
                        int jitter_buffer_ms,
                        int min_playout_delay_ms,
                        int render_delay_ms,
                        int64_t rtt_ms);
 
+  void OnPreDecode(const EncodedImage& encoded_image,
+                   const CodecSpecificInfo* codec_specific_info);
+
   // Overrides VCMReceiveStatisticsCallback.
   void OnReceiveRatesUpdated(uint32_t bitRate, uint32_t frameRate) override;
   void OnFrameCountsUpdated(const FrameCounts& frame_counts) override;
   void OnDiscardedPacketsUpdated(int discarded_packets) override;
 
   // Overrides RtcpStatisticsCallback.
   void StatisticsUpdated(const webrtc::RtcpStatistics& statistics,
                          uint32_t ssrc) override;
   void CNameChanged(const char* cname, uint32_t ssrc) override;
 
   // Overrides RtcpPacketTypeCounterObserver.
   void RtcpPacketTypesCounterUpdated(
       uint32_t ssrc,
       const RtcpPacketTypeCounter& packet_counter) override;
   // Overrides StreamDataCountersCallback.
   void DataCountersUpdated(const webrtc::StreamDataCounters& counters,
                            uint32_t ssrc) override;
 
  private:
   struct SampleCounter {
     SampleCounter() : sum(0), num_samples(0) {}
     void Add(int sample);
     int Avg(int min_required_samples) const;
 
    private:
     int sum;
     int num_samples;
   };
+  struct QpCounters {
+    SampleCounter vp8;
+  };
 
   void UpdateHistograms() EXCLUSIVE_LOCKS_REQUIRED(crit_);
 
   Clock* const clock_;
 
   mutable rtc::CriticalSection crit_;
   VideoReceiveStream::Stats stats_ GUARDED_BY(crit_);
   RateStatistics decode_fps_estimator_ GUARDED_BY(crit_);
   RateStatistics renders_fps_estimator_ GUARDED_BY(crit_);
   rtc::RateTracker render_fps_tracker_ GUARDED_BY(crit_);
   rtc::RateTracker render_pixel_tracker_ GUARDED_BY(crit_);
   SampleCounter render_width_counter_ GUARDED_BY(crit_);
   SampleCounter render_height_counter_ GUARDED_BY(crit_);
   SampleCounter decode_time_counter_ GUARDED_BY(crit_);
   SampleCounter delay_counter_ GUARDED_BY(crit_);
   ReportBlockStats report_block_stats_ GUARDED_BY(crit_);
+  QpCounters qp_counters_;  // Only accessed on the decoding thread.
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_VIDEO_RECEIVE_STATISTICS_PROXY_H_