Add QP sum stats for received streams.

webrtc/video/video_stream_decoder.h

 /*
  *  Copyright (c) 2012 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 42 matching lines @@
                      VCMFrameTypeCallback* vcm_frame_type_callback,
                      VCMPacketRequestCallback* vcm_packet_request_callback,
                      bool enable_nack,
                      bool enable_fec,
                      ReceiveStatisticsProxy* receive_statistics_proxy,
                      rtc::VideoSinkInterface<VideoFrame>* incoming_video_stream,
                      I420FrameCallback* pre_render_callback);
   ~VideoStreamDecoder();
 
   // Implements VCMReceiveCallback.
-  int32_t FrameToRender(VideoFrame& video_frame) override;  // NOLINT
+  int32_t FrameToRender(VideoFrame& video_frame, int qp) override;  // NOLINT

[hbos, 2017/01/25 11:31:13]

rtc::Optional<uint64_t>

   int32_t ReceivedDecodedReferenceFrame(const uint64_t picture_id) override;
   void OnIncomingPayloadType(int payload_type) override;
   void OnDecoderImplementationName(const char* implementation_name) override;
 
   // Implements VCMReceiveStatisticsCallback.
   void OnReceiveRatesUpdated(uint32_t bit_rate, uint32_t frame_rate) override;
   void OnDiscardedPacketsUpdated(int discarded_packets) override;
   void OnFrameCountsUpdated(const FrameCounts& frame_counts) override;
 
   // Implements VCMDecoderTimingCallback.
@@ skipping 23 matching lines @@
   // TODO(tommi): This callback is basically the same thing as the one above.
   // We shouldn't need to support both.
   I420FrameCallback* const pre_render_callback_;
 
   int64_t last_rtt_ms_ GUARDED_BY(crit_);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_VIDEO_STREAM_DECODER_H_