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// Copyright 2013 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 MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
#define MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread.h"
#include "media/base/audio_renderer_sink.h"
#include "media/base/cdm_factory.h"
#include "media/base/media_export.h"
#include "media/base/pipeline.h"
#include "media/base/renderer.h"
#include "media/base/text_track.h"
#include "media/blink/buffered_data_source.h"
#include "media/blink/buffered_data_source_host_impl.h"
#include "media/blink/encrypted_media_player_support.h"
#include "media/blink/video_frame_compositor.h"
#include "media/filters/skcanvas_video_renderer.h"
#include "third_party/WebKit/public/platform/WebAudioSourceProvider.h"
#include "third_party/WebKit/public/platform/WebContentDecryptionModuleResult.h"
#include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
#include "third_party/WebKit/public/platform/WebMediaPlayer.h"
#include "third_party/WebKit/public/platform/WebMediaPlayerClient.h"
#include "url/gurl.h"
namespace blink {
class WebLocalFrame;
}
namespace base {
class SingleThreadTaskRunner;
}
namespace cc_blink {
class WebLayerImpl;
}
namespace media {
class AudioHardwareConfig;
class ChunkDemuxer;
class GpuVideoAcceleratorFactories;
class MediaLog;
class VideoFrameCompositor;
class WebAudioSourceProviderImpl;
class WebMediaPlayerDelegate;
class WebMediaPlayerParams;
class WebTextTrackImpl;
// The canonical implementation of blink::WebMediaPlayer that's backed by
// Pipeline. Handles normal resource loading, Media Source, and
// Encrypted Media.
class MEDIA_EXPORT WebMediaPlayerImpl
: public NON_EXPORTED_BASE(blink::WebMediaPlayer),
public base::SupportsWeakPtr<WebMediaPlayerImpl> {
public:
// Constructs a WebMediaPlayer implementation using Chromium's media stack.
// |delegate| may be null. |renderer| may also be null, in which case an
// internal renderer will be created.
// TODO(xhwang): Drop the internal renderer path and always pass in a renderer
// here.
WebMediaPlayerImpl(blink::WebLocalFrame* frame,
blink::WebMediaPlayerClient* client,
base::WeakPtr<WebMediaPlayerDelegate> delegate,
scoped_ptr<Renderer> renderer,
scoped_ptr<CdmFactory> cdm_factory,
const WebMediaPlayerParams& params);
virtual ~WebMediaPlayerImpl();
virtual void load(LoadType load_type,
const blink::WebURL& url,
CORSMode cors_mode);
// Playback controls.
virtual void play();
virtual void pause();
virtual bool supportsSave() const;
virtual void seek(double seconds);
virtual void setRate(double rate);
virtual void setVolume(double volume);
virtual void setPreload(blink::WebMediaPlayer::Preload preload);
virtual blink::WebTimeRanges buffered() const;
virtual blink::WebTimeRanges seekable() const;
// Methods for painting.
virtual void paint(blink::WebCanvas* canvas,
const blink::WebRect& rect,
unsigned char alpha,
SkXfermode::Mode mode);
// True if the loaded media has a playable video/audio track.
virtual bool hasVideo() const;
virtual bool hasAudio() const;
// Dimensions of the video.
virtual blink::WebSize naturalSize() const;
// Getters of playback state.
virtual bool paused() const;
virtual bool seeking() const;
virtual double duration() const;
virtual double timelineOffset() const;
virtual double currentTime() const;
// Internal states of loading and network.
// TODO(hclam): Ask the pipeline about the state rather than having reading
// them from members which would cause race conditions.
virtual blink::WebMediaPlayer::NetworkState networkState() const;
virtual blink::WebMediaPlayer::ReadyState readyState() const;
virtual bool didLoadingProgress();
virtual bool hasSingleSecurityOrigin() const;
virtual bool didPassCORSAccessCheck() const;
virtual double mediaTimeForTimeValue(double timeValue) const;
virtual unsigned decodedFrameCount() const;
virtual unsigned droppedFrameCount() const;
virtual unsigned audioDecodedByteCount() const;
virtual unsigned videoDecodedByteCount() const;
virtual bool copyVideoTextureToPlatformTexture(
blink::WebGraphicsContext3D* web_graphics_context,
unsigned int texture,
unsigned int level,
unsigned int internal_format,
unsigned int type,
bool premultiply_alpha,
bool flip_y);
virtual blink::WebAudioSourceProvider* audioSourceProvider();
virtual MediaKeyException generateKeyRequest(
const blink::WebString& key_system,
const unsigned char* init_data,
unsigned init_data_length);
virtual MediaKeyException addKey(const blink::WebString& key_system,
const unsigned char* key,
unsigned key_length,
const unsigned char* init_data,
unsigned init_data_length,
const blink::WebString& session_id);
virtual MediaKeyException cancelKeyRequest(
const blink::WebString& key_system,
const blink::WebString& session_id);
virtual void setContentDecryptionModule(
blink::WebContentDecryptionModule* cdm,
blink::WebContentDecryptionModuleResult result);
void OnPipelineSeeked(bool time_changed, PipelineStatus status);
void OnPipelineEnded();
void OnPipelineError(PipelineStatus error);
void OnPipelineMetadata(PipelineMetadata metadata);
void OnPipelineBufferingStateChanged(BufferingState buffering_state);
void OnDemuxerOpened();
void OnAddTextTrack(const TextTrackConfig& config,
const AddTextTrackDoneCB& done_cb);
private:
// Called after |defer_load_cb_| has decided to allow the load. If
// |defer_load_cb_| is null this is called immediately.
void DoLoad(LoadType load_type,
const blink::WebURL& url,
CORSMode cors_mode);
// Called after asynchronous initialization of a data source completed.
void DataSourceInitialized(bool success);
// Called when the data source is downloading or paused.
void NotifyDownloading(bool is_downloading);
// Creates a Renderer that will be used by the |pipeline_|.
scoped_ptr<Renderer> CreateRenderer();
// Finishes starting the pipeline due to a call to load().
void StartPipeline();
// Helpers that set the network/ready state and notifies the client if
// they've changed.
void SetNetworkState(blink::WebMediaPlayer::NetworkState state);
void SetReadyState(blink::WebMediaPlayer::ReadyState state);
// Gets the duration value reported by the pipeline.
double GetPipelineDuration() const;
// Callbacks from |pipeline_| that are forwarded to |client_|.
void OnDurationChanged();
void OnNaturalSizeChanged(gfx::Size size);
void OnOpacityChanged(bool opaque);
// Called by VideoRendererImpl on its internal thread with the new frame to be
// painted.
void FrameReady(const scoped_refptr<VideoFrame>& frame);
// Returns the current video frame from |compositor_|. Blocks until the
// compositor can return the frame.
scoped_refptr<VideoFrame> GetCurrentFrameFromCompositor();
void SetCdm(CdmContext* cdm_context, const CdmAttachedCB& cdm_attached_cb);
// Called when a CDM has been attached to the |pipeline_|.
void OnCdmAttached(blink::WebContentDecryptionModuleResult result,
bool success);
blink::WebLocalFrame* frame_;
// TODO(hclam): get rid of these members and read from the pipeline directly.
blink::WebMediaPlayer::NetworkState network_state_;
blink::WebMediaPlayer::ReadyState ready_state_;
// Preload state for when |data_source_| is created after setPreload().
BufferedDataSource::Preload preload_;
// Task runner for posting tasks on Chrome's main thread. Also used
// for DCHECKs so methods calls won't execute in the wrong thread.
const scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
scoped_refptr<MediaLog> media_log_;
Pipeline pipeline_;
// The LoadType passed in the |load_type| parameter of the load() call.
LoadType load_type_;
// Cache of metadata for answering hasAudio(), hasVideo(), and naturalSize().
PipelineMetadata pipeline_metadata_;
// Whether the video is known to be opaque or not.
bool opaque_;
// Playback state.
//
// TODO(scherkus): we have these because Pipeline favours the simplicity of a
// single "playback rate" over worrying about paused/stopped etc... It forces
// all clients to manage the pause+playback rate externally, but is that
// really a bad thing?
//
// TODO(scherkus): since SetPlaybackRate(0) is asynchronous and we don't want
// to hang the render thread during pause(), we record the time at the same
// time we pause and then return that value in currentTime(). Otherwise our
// clock can creep forward a little bit while the asynchronous
// SetPlaybackRate(0) is being executed.
bool paused_;
bool seeking_;
double playback_rate_;
base::TimeDelta paused_time_;
// TODO(scherkus): Replace with an explicit ended signal to HTMLMediaElement,
// see http://crbug.com/409280
bool ended_;
// Seek gets pending if another seek is in progress. Only last pending seek
// will have effect.
bool pending_seek_;
double pending_seek_seconds_;
// Tracks whether to issue time changed notifications during buffering state
// changes.
bool should_notify_time_changed_;
blink::WebMediaPlayerClient* client_;
base::WeakPtr<WebMediaPlayerDelegate> delegate_;
base::Callback<void(const base::Closure&)> defer_load_cb_;
// Factories for supporting video accelerators. May be null.
scoped_refptr<GpuVideoAcceleratorFactories> gpu_factories_;
// Routes audio playback to either AudioRendererSink or WebAudio.
scoped_refptr<WebAudioSourceProviderImpl> audio_source_provider_;
bool supports_save_;
// These two are mutually exclusive:
// |data_source_| is used for regular resource loads.
// |chunk_demuxer_| is used for Media Source resource loads.
//
// |demuxer_| will contain the appropriate demuxer based on which resource
// load strategy we're using.
scoped_ptr<BufferedDataSource> data_source_;
scoped_ptr<Demuxer> demuxer_;
ChunkDemuxer* chunk_demuxer_;
BufferedDataSourceHostImpl buffered_data_source_host_;
// Video rendering members.
scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner_;
VideoFrameCompositor* compositor_; // Deleted on |compositor_task_runner_|.
SkCanvasVideoRenderer skcanvas_video_renderer_;
// The compositor layer for displaying the video content when using composited
// playback.
scoped_ptr<cc_blink::WebLayerImpl> video_weblayer_;
// Text track objects get a unique index value when they're created.
int text_track_index_;
EncryptedMediaPlayerSupport encrypted_media_support_;
const AudioHardwareConfig& audio_hardware_config_;
scoped_ptr<Renderer> renderer_;
DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
};
} // namespace media
#endif // MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_