[Chromecast] Add metrics for logging platform A/V bitrate estimates.

chromecast/media/cma/pipeline/av_pipeline_impl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROMECAST_MEDIA_CMA_PIPELINE_AV_PIPELINE_IMPL_H_
 #define CHROMECAST_MEDIA_CMA_PIPELINE_AV_PIPELINE_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 36 matching lines @@
   // time, then start rendering samples.
   bool StartPlayingFrom(base::TimeDelta time,
                         const scoped_refptr<BufferingState>& buffering_state);
   void Flush(const base::Closure& flush_cb);
 
   // Stop feeding the backend.
   void Stop();
 
   virtual void UpdateStatistics() = 0;
 
+  int bytes_decoded_since_last_update() const {
+    return bytes_decoded_since_last_update_;
+  }
+
  protected:
   // Pipeline states.
   enum State {
     kUninitialized,
     kPlaying,
     kFlushing,
     kFlushed,
     kStopped,
     kError,
   };
 
   State state() const { return state_; }
   void set_state(State state) { state_ = state; }
   const AvPipelineClient& client() const { return client_; }
 
   virtual void OnUpdateConfig(
       StreamId id,
       const ::media::AudioDecoderConfig& audio_config,
       const ::media::VideoDecoderConfig& video_config) = 0;
 
   // Setting the frame provider must be done in the |kUninitialized| state.
   void SetCodedFrameProvider(scoped_ptr<CodedFrameProvider> frame_provider,
                              size_t max_buffer_size,
                              size_t max_frame_size);
 
   ::media::PipelineStatistics previous_stats_;
+  int bytes_decoded_since_last_update_;
 
  private:
   void OnFlushDone();
 
   // MediaPipelineBackend::Decoder::Delegate implementation:
   void OnPushBufferComplete(BufferStatus status) override;
   void OnEndOfStream() override;
   void OnDecoderError() override;
   void OnKeyStatusChanged(const std::string& key_id,
                           CastKeyStatus key_status,
@@ skipping 79 matching lines @@
   base::WeakPtr<AvPipelineImpl> weak_this_;
   base::WeakPtrFactory<AvPipelineImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AvPipelineImpl);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_MEDIA_CMA_PIPELINE_AV_PIPELINE_IMPL_H_