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// 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>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "chromecast/media/cma/backend/cma_backend.h"
#include "chromecast/media/cma/pipeline/load_type.h"
#include "chromecast/media/cma/pipeline/media_pipeline_client.h"
#include "media/base/time_delta_interpolator.h"
namespace media {
class AudioDecoderConfig;
class VideoDecoderConfig;
} // namespace media
namespace chromecast {
namespace media {
class AudioPipelineImpl;
class BufferingController;
class CastCdmContext;
class CodedFrameProvider;
class VideoPipelineImpl;
struct AvPipelineClient;
struct VideoPipelineClient;
class MediaPipelineImpl {
public:
MediaPipelineImpl();
~MediaPipelineImpl();
// Initialize the media pipeline: the pipeline is configured based on
// |load_type|.
void Initialize(LoadType load_type,
std::unique_ptr<CmaBackend> media_pipeline_backend);
void SetClient(const MediaPipelineClient& client);
void SetCdm(int cdm_id);
::media::PipelineStatus InitializeAudio(
const ::media::AudioDecoderConfig& config,
const AvPipelineClient& client,
std::unique_ptr<CodedFrameProvider> frame_provider);
::media::PipelineStatus InitializeVideo(
const std::vector<::media::VideoDecoderConfig>& configs,
const VideoPipelineClient& client,
std::unique_ptr<CodedFrameProvider> frame_provider);
void StartPlayingFrom(base::TimeDelta time);
void Flush(const base::Closure& flush_cb);
void SetPlaybackRate(double playback_rate);
void SetVolume(float volume);
base::TimeDelta GetMediaTime() const;
bool HasAudio() const;
bool HasVideo() const;
void SetCdm(CastCdmContext* 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();
base::ThreadChecker thread_checker_;
MediaPipelineClient client_;
std::unique_ptr<BufferingController> buffering_controller_;
CastCdmContext* cdm_context_;
// Interface with the underlying hardware media pipeline.
BackendState backend_state_;
// Playback rate set by the upper layer.
// Cached here because CMA pipeline backend does not support rate == 0,
// which is emulated by pausing the backend.
float playback_rate_;
// Since av pipeline still need to access device components in their
// destructor, it's important to delete them first.
std::unique_ptr<CmaBackend> media_pipeline_backend_;
CmaBackend::AudioDecoder* audio_decoder_;
CmaBackend::VideoDecoder* video_decoder_;
std::unique_ptr<AudioPipelineImpl> audio_pipeline_;
std::unique_ptr<VideoPipelineImpl> video_pipeline_;
std::unique_ptr<FlushTask> pending_flush_task_;
// The media time is retrieved at regular intervals.
bool pending_time_update_task_;
base::TimeDelta start_media_time_;
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_;
// It's used to estimate current media time when the timestamp returned by
// backend is invalid.
::media::TimeDeltaInterpolator media_time_interpolator_;
bool waiting_for_first_have_enough_data_ = true;
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_