Chromecast: adds a media pipeline feeding data to CMA device backends.

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 "media/base/serial_runner.h"
+
+namespace chromecast {
+namespace media {
+class AudioPipelineImpl;
+class BufferingController;
+class MediaClockDevice;
+class MediaPipelineDevice;
+class VideoPipelineImpl;
+
+class MediaPipelineImpl : public MediaPipeline {
+ public:
+  MediaPipelineImpl();
+  ~MediaPipelineImpl() override;
+
+  // Initialize the media pipeline: the pipeline is configured based on
+  // |load_type|.
+  void Initialize(LoadType load_type,
+                  scoped_ptr<MediaPipelineDevice> media_pipeline_device);
+
+  // 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 ::media::VideoDecoderConfig& config,
+      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(float playback_rate) override;
+
+  AudioPipelineImpl* GetAudioPipelineImpl() const;
+  VideoPipelineImpl* GetVideoPipelineImpl() const;
+
+  void SetCdm(::media::BrowserCdm* 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_;
+
+  scoped_ptr<BufferingController> buffering_controller_;
+
+  // Interface with the underlying hardware media pipeline.
+  scoped_ptr<MediaPipelineDevice> media_pipeline_device_;
+  MediaClockDevice* clock_device_;
+
+  bool has_audio_;
+  bool has_video_;
+  scoped_ptr<AudioPipelineImpl> audio_pipeline_;
+  scoped_ptr<VideoPipelineImpl> video_pipeline_;
+  scoped_ptr< ::media::SerialRunner> pending_callbacks_;
+
+  // 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::WeakPtrFactory<MediaPipelineImpl> weak_factory_;
+  base::WeakPtr<MediaPipelineImpl> weak_this_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaPipelineImpl);
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_CMA_PIPELINE_MEDIA_PIPELINE_IMPL_H_