[Chromecast] Upgrade to new CMA backend API

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 "base/basictypes.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "chromecast/media/cma/pipeline/load_type.h"
 #include "chromecast/media/cma/pipeline/media_pipeline.h"
 #include "chromecast/media/cma/pipeline/media_pipeline_client.h"
+#include "chromecast/public/media/media_pipeline_backend.h"
 #include "media/base/serial_runner.h"
 
 namespace chromecast {
 namespace media {
+
 class AudioPipelineImpl;
+struct BrowserAvPipelineClient;
+struct BrowserVideoPipelineClient;
 class BrowserCdmCast;
 class BufferingController;
-class MediaClockDevice;
-class MediaPipelineBackend;
 class VideoPipelineImpl;
 
-class MediaPipelineImpl : public MediaPipeline {
+class MediaPipelineImpl : public MediaPipelineBackend::Delegate {
  public:
   MediaPipelineImpl();
   ~MediaPipelineImpl() override;
 
   // Initialize the media pipeline: the pipeline is configured based on
   // |load_type|.
   void Initialize(LoadType load_type,
                   scoped_ptr<MediaPipelineBackend> media_pipeline_backend);
 
-  // MediaPipeline implementation.
-  void SetClient(const MediaPipelineClient& client) override;
-  void SetCdm(int cdm_id) override;
-  AudioPipeline* GetAudioPipeline() const override;
-  VideoPipeline* GetVideoPipeline() const override;
-  void InitializeAudio(
-      const ::media::AudioDecoderConfig& config,
-      scoped_ptr<CodedFrameProvider> frame_provider,
-      const ::media::PipelineStatusCB& status_cb) override;
-  void InitializeVideo(
-      const std::vector<::media::VideoDecoderConfig>& configs,
-      scoped_ptr<CodedFrameProvider> frame_provider,
-      const ::media::PipelineStatusCB& status_cb) override;
-  void StartPlayingFrom(base::TimeDelta time) override;
-  void Flush(const ::media::PipelineStatusCB& status_cb) override;
-  void Stop() override;
-  void SetPlaybackRate(double playback_rate) override;
+  void SetClient(const BrowserMediaPipelineClient& client);
+  void SetCdm(int cdm_id);
 
-  AudioPipelineImpl* GetAudioPipelineImpl() const;
-  VideoPipelineImpl* GetVideoPipelineImpl() const;
+  // MediaPipelineBackendDelegate implementation:
+  void OnVideoResolutionChanged(MediaPipelineBackend::Decoder* decoder,
+                                const Size& size) override;
+  void OnPushBufferComplete(MediaPipelineBackend::Decoder* decoder,
+                            MediaPipelineBackend::BufferStatus status) override;
+  void OnEndOfStream(MediaPipelineBackend::Decoder* decoder) override;
+  void OnDecoderError(MediaPipelineBackend::Decoder* decoder) override;
+
+  void InitializeAudio(const ::media::AudioDecoderConfig& config,
+                       const BrowserAvPipelineClient& client,
+                       scoped_ptr<CodedFrameProvider> frame_provider,
+                       const ::media::PipelineStatusCB& status_cb);
+  void InitializeVideo(const std::vector< ::media::VideoDecoderConfig>& configs,
+                       const BrowserVideoPipelineClient& client,
+                       scoped_ptr<CodedFrameProvider> frame_provider,
+                       const ::media::PipelineStatusCB& status_cb);
+  void StartPlayingFrom(base::TimeDelta time);
+  void Flush(const ::media::PipelineStatusCB& status_cb);
+  void Stop();
+  void SetPlaybackRate(double playback_rate);
+  void SetVolume(float volume);
 
   void SetCdm(BrowserCdmCast* cdm);
 
  private:
   void StateTransition(const ::media::PipelineStatusCB& status_cb,
                        ::media::PipelineStatus status);
 
   // Invoked to notify about a change of buffering state.
   void OnBufferingNotification(bool is_buffering);
 
   void UpdateMediaTime();
 
   void OnError(::media::PipelineStatus error);
 
   base::ThreadChecker thread_checker_;
 
-  MediaPipelineClient client_;
+  BrowserMediaPipelineClient client_;
 
   scoped_ptr<BufferingController> buffering_controller_;
 
   // Interface with the underlying hardware media pipeline.
   scoped_ptr<MediaPipelineBackend> media_pipeline_backend_;
-  MediaClockDevice* clock_device_;
+  MediaPipelineBackend::AudioDecoder* audio_decoder_;
+  MediaPipelineBackend::VideoDecoder* video_decoder_;
 
+  bool backend_initialized_;
   bool has_audio_;
   bool has_video_;
   scoped_ptr<AudioPipelineImpl> audio_pipeline_;
   scoped_ptr<VideoPipelineImpl> video_pipeline_;
   scoped_ptr< ::media::SerialRunner> pending_flush_callbacks_;
 
+  // Whether or not the backend is currently paused.
+  bool paused_;
   // Playback rate set by the upper layer.
   float target_playback_rate_;
 
-  // Indicate a possible re-buffering phase.
-  bool is_buffering_;
-
   // The media time is retrieved at regular intervals.
   // Indicate whether time update is enabled.
   bool enable_time_update_;
   bool pending_time_update_task_;
   base::TimeDelta last_media_time_;
 
   // Used to make the statistics update period a multiplier of the time update
   // period.
   int statistics_rolling_counter_;
 
   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_