[Chromecast] Log playback stall event.

chromecast/media/cma/pipeline/media_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_MEDIA_PIPELINE_IMPL_H_
 #define CHROMECAST_MEDIA_CMA_PIPELINE_MEDIA_PIPELINE_IMPL_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 56 matching lines @@
   void SetCdm(BrowserCdmCast* cdm);
 
  private:
   enum BackendState {
     BACKEND_STATE_UNINITIALIZED,
     BACKEND_STATE_INITIALIZED,
     BACKEND_STATE_PLAYING,
     BACKEND_STATE_PAUSED
   };
   struct FlushTask;
+  void CheckForPlaybackStall(base::TimeDelta media_time,
+                             base::TimeTicks current_stc);
+
   void OnFlushDone(bool is_audio_stream);
 
   // Invoked to notify about a change of buffering state.
   void OnBufferingNotification(bool is_buffering);
 
   void UpdateMediaTime();
 
   void OnError(::media::PipelineStatus error);
 
   void ResetBitrateState();
@@ skipping 22 matching lines @@
   base::TimeDelta last_media_time_;
 
   // Used to make the statistics update period a multiplier of the time update
   // period.
   int statistics_rolling_counter_;
   base::TimeTicks last_sample_time_;
   base::TimeDelta elapsed_time_delta_;
   int audio_bytes_for_bitrate_estimation_;
   int video_bytes_for_bitrate_estimation_;
 
+  // Playback stalled handling.
+  bool playback_stalled_;
+  base::TimeTicks playback_stalled_time_;
+  bool playback_stalled_notification_sent_;
+
   base::WeakPtr<MediaPipelineImpl> weak_this_;
   base::WeakPtrFactory<MediaPipelineImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaPipelineImpl);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_MEDIA_CMA_PIPELINE_MEDIA_PIPELINE_IMPL_H_