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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MEDIA_RENDERERS_RENDERER_IMPL_H_ | 5 #ifndef MEDIA_RENDERERS_RENDERER_IMPL_H_ |
6 #define MEDIA_RENDERERS_RENDERER_IMPL_H_ | 6 #define MEDIA_RENDERERS_RENDERER_IMPL_H_ |
7 | 7 |
8 #include <list> | 8 #include <list> |
9 #include <memory> | 9 #include <memory> |
10 #include <vector> | 10 #include <vector> |
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54 RendererClient* client, | 54 RendererClient* client, |
55 const PipelineStatusCB& init_cb) final; | 55 const PipelineStatusCB& init_cb) final; |
56 void SetCdm(CdmContext* cdm_context, | 56 void SetCdm(CdmContext* cdm_context, |
57 const CdmAttachedCB& cdm_attached_cb) final; | 57 const CdmAttachedCB& cdm_attached_cb) final; |
58 void Flush(const base::Closure& flush_cb) final; | 58 void Flush(const base::Closure& flush_cb) final; |
59 void StartPlayingFrom(base::TimeDelta time) final; | 59 void StartPlayingFrom(base::TimeDelta time) final; |
60 void SetPlaybackRate(double playback_rate) final; | 60 void SetPlaybackRate(double playback_rate) final; |
61 void SetVolume(float volume) final; | 61 void SetVolume(float volume) final; |
62 base::TimeDelta GetMediaTime() final; | 62 base::TimeDelta GetMediaTime() final; |
63 | 63 |
64 void OnStreamStatusChanged(DemuxerStream* stream, | |
65 bool enabled, | |
66 base::TimeDelta time); | |
67 | |
68 // Helper functions for testing purposes. Must be called before Initialize(). | 64 // Helper functions for testing purposes. Must be called before Initialize(). |
69 void DisableUnderflowForTesting(); | 65 void DisableUnderflowForTesting(); |
70 void EnableClocklessVideoPlaybackForTesting(); | 66 void EnableClocklessVideoPlaybackForTesting(); |
71 void set_time_source_for_testing(TimeSource* time_source) { | 67 void set_time_source_for_testing(TimeSource* time_source) { |
72 time_source_ = time_source; | 68 time_source_ = time_source; |
73 } | 69 } |
74 void set_video_underflow_threshold_for_testing(base::TimeDelta threshold) { | 70 void set_video_underflow_threshold_for_testing(base::TimeDelta threshold) { |
75 video_underflow_threshold_ = threshold; | 71 video_underflow_threshold_ = threshold; |
76 } | 72 } |
77 | 73 |
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99 void OnAudioRendererInitializeDone(PipelineStatus status); | 95 void OnAudioRendererInitializeDone(PipelineStatus status); |
100 void InitializeVideoRenderer(); | 96 void InitializeVideoRenderer(); |
101 void OnVideoRendererInitializeDone(PipelineStatus status); | 97 void OnVideoRendererInitializeDone(PipelineStatus status); |
102 | 98 |
103 // Helper functions and callbacks for Flush(). | 99 // Helper functions and callbacks for Flush(). |
104 void FlushAudioRenderer(); | 100 void FlushAudioRenderer(); |
105 void OnAudioRendererFlushDone(); | 101 void OnAudioRendererFlushDone(); |
106 void FlushVideoRenderer(); | 102 void FlushVideoRenderer(); |
107 void OnVideoRendererFlushDone(); | 103 void OnVideoRendererFlushDone(); |
108 | 104 |
109 void RestartAudioRenderer(base::TimeDelta time); | 105 // This function notifies the renderer that the status of the demuxer |stream| |
110 void RestartVideoRenderer(base::TimeDelta time); | 106 // has been changed, the new status is |enabled| and the change occured while |
| 107 // playback position was |time|. |
| 108 void OnStreamStatusChanged(DemuxerStream* stream, |
| 109 bool enabled, |
| 110 base::TimeDelta time); |
| 111 |
| 112 // Reinitialize audio/video renderer during a demuxer stream switching. The |
| 113 // renderer must be flushed first, and when the re-init is completed the |
| 114 // corresponding callback will be invoked to restart playback. |
| 115 // The |stream| parameter specifies the new demuxer stream, and the |time| |
| 116 // parameter specifies the time on media timeline where the switch occured. |
| 117 void ReinitializeAudioRenderer(DemuxerStream* stream, base::TimeDelta time); |
| 118 void OnAudioRendererReinitialized(DemuxerStream* stream, |
| 119 base::TimeDelta time, |
| 120 PipelineStatus status); |
| 121 void ReinitializeVideoRenderer(DemuxerStream* stream, base::TimeDelta time); |
| 122 void OnVideoRendererReinitialized(DemuxerStream* stream, |
| 123 base::TimeDelta time, |
| 124 PipelineStatus status); |
| 125 |
| 126 // Restart audio/video renderer playback after a demuxer stream switch or |
| 127 // after a demuxer stream has been disabled and re-enabled. The |stream| |
| 128 // parameter specifies which stream needs to be restarted. The |time| |
| 129 // parameter specifies the position on the media timeline where the playback |
| 130 // needs to be restarted. It is necessary for demuxers with independent |
| 131 // streams (e.g. MSE / ChunkDemuxer) to synchronize data reading between those |
| 132 // streams. |
| 133 void RestartAudioRenderer(DemuxerStream* stream, base::TimeDelta time); |
| 134 void RestartVideoRenderer(DemuxerStream* stream, base::TimeDelta time); |
111 | 135 |
112 // Callback executed by filters to update statistics. | 136 // Callback executed by filters to update statistics. |
113 void OnStatisticsUpdate(const PipelineStatistics& stats); | 137 void OnStatisticsUpdate(const PipelineStatistics& stats); |
114 | 138 |
115 // Collection of callback methods and helpers for tracking changes in | 139 // Collection of callback methods and helpers for tracking changes in |
116 // buffering state and transition from paused/underflow states and playing | 140 // buffering state and transition from paused/underflow states and playing |
117 // states. | 141 // states. |
118 // | 142 // |
119 // While in the kPlaying state: | 143 // While in the kPlaying state: |
120 // - A waiting to non-waiting transition indicates preroll has completed | 144 // - A waiting to non-waiting transition indicates preroll has completed |
121 // and StartPlayback() should be called | 145 // and StartPlayback() should be called |
122 // - A non-waiting to waiting transition indicates underflow has occurred | 146 // - A non-waiting to waiting transition indicates underflow has occurred |
123 // and PausePlayback() should be called | 147 // and PausePlayback() should be called |
124 void OnBufferingStateChange(DemuxerStream::Type type, | 148 void OnBufferingStateChange(DemuxerStream::Type type, |
125 BufferingState new_buffering_state); | 149 BufferingState new_buffering_state); |
| 150 |
126 // Handles the buffering notifications that we might get while an audio or a | 151 // Handles the buffering notifications that we might get while an audio or a |
127 // video stream is being restarted. In those cases we don't want to report | 152 // video stream is being restarted. In those cases we don't want to report |
128 // underflows immediately and instead give decoders a chance to catch up with | 153 // underflows immediately and instead give decoders a chance to catch up with |
129 // currently playing stream. Returns true if the buffering nofication has been | 154 // currently playing stream. Returns true if the buffering nofication has been |
130 // handled and no further processing is necessary, returns false to indicate | 155 // handled and no further processing is necessary, returns false to indicate |
131 // that we should fall back to the regular OnBufferingStateChange logic. | 156 // that we should fall back to the regular OnBufferingStateChange logic. |
132 bool HandleRestartedStreamBufferingChanges( | 157 bool HandleRestartedStreamBufferingChanges( |
133 DemuxerStream::Type type, | 158 DemuxerStream::Type type, |
134 BufferingState new_buffering_state); | 159 BufferingState new_buffering_state); |
| 160 |
135 bool WaitingForEnoughData() const; | 161 bool WaitingForEnoughData() const; |
136 void PausePlayback(); | 162 void PausePlayback(); |
137 void StartPlayback(); | 163 void StartPlayback(); |
138 | 164 |
139 // Callbacks executed when a renderer has ended. | 165 // Callbacks executed when a renderer has ended. |
140 void OnRendererEnded(DemuxerStream::Type type); | 166 void OnRendererEnded(DemuxerStream::Type type); |
141 bool PlaybackHasEnded() const; | 167 bool PlaybackHasEnded() const; |
142 void RunEndedCallbackIfNeeded(); | 168 void RunEndedCallbackIfNeeded(); |
143 | 169 |
144 // Callback executed when a runtime error happens. | 170 // Callback executed when a runtime error happens. |
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159 | 185 |
160 // Temporary callback used for Initialize() and Flush(). | 186 // Temporary callback used for Initialize() and Flush(). |
161 PipelineStatusCB init_cb_; | 187 PipelineStatusCB init_cb_; |
162 base::Closure flush_cb_; | 188 base::Closure flush_cb_; |
163 | 189 |
164 std::unique_ptr<RendererClientInternal> audio_renderer_client_; | 190 std::unique_ptr<RendererClientInternal> audio_renderer_client_; |
165 std::unique_ptr<RendererClientInternal> video_renderer_client_; | 191 std::unique_ptr<RendererClientInternal> video_renderer_client_; |
166 std::unique_ptr<AudioRenderer> audio_renderer_; | 192 std::unique_ptr<AudioRenderer> audio_renderer_; |
167 std::unique_ptr<VideoRenderer> video_renderer_; | 193 std::unique_ptr<VideoRenderer> video_renderer_; |
168 | 194 |
| 195 DemuxerStream* current_audio_stream_; |
| 196 DemuxerStream* current_video_stream_; |
| 197 |
169 // Renderer-provided time source used to control playback. | 198 // Renderer-provided time source used to control playback. |
170 TimeSource* time_source_; | 199 TimeSource* time_source_; |
171 std::unique_ptr<WallClockTimeSource> wall_clock_time_source_; | 200 std::unique_ptr<WallClockTimeSource> wall_clock_time_source_; |
172 bool time_ticking_; | 201 bool time_ticking_; |
173 double playback_rate_; | 202 double playback_rate_; |
174 | 203 |
175 // The time to start playback from after starting/seeking has completed. | 204 // The time to start playback from after starting/seeking has completed. |
176 base::TimeDelta start_time_; | 205 base::TimeDelta start_time_; |
177 | 206 |
178 BufferingState audio_buffering_state_; | 207 BufferingState audio_buffering_state_; |
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193 | 222 |
194 // Used to defer underflow for audio when restarting audio playback. | 223 // Used to defer underflow for audio when restarting audio playback. |
195 base::CancelableClosure deferred_audio_restart_underflow_cb_; | 224 base::CancelableClosure deferred_audio_restart_underflow_cb_; |
196 | 225 |
197 // The amount of time to wait before declaring underflow if the video renderer | 226 // The amount of time to wait before declaring underflow if the video renderer |
198 // runs out of data but the audio renderer still has enough. | 227 // runs out of data but the audio renderer still has enough. |
199 base::TimeDelta video_underflow_threshold_; | 228 base::TimeDelta video_underflow_threshold_; |
200 | 229 |
201 bool restarting_audio_ = false; | 230 bool restarting_audio_ = false; |
202 bool restarting_video_ = false; | 231 bool restarting_video_ = false; |
203 std::list<base::Closure> pending_stream_status_notifications_; | 232 |
| 233 // Flush operations and media track status changes must be serialized to avoid |
| 234 // interfering with each other. This list will hold a list of postponed |
| 235 // actions that need to be completed after the current async operation is |
| 236 // completed. |
| 237 std::list<base::Closure> pending_actions_; |
| 238 base::Closure pending_flush_cb_; |
204 | 239 |
205 base::WeakPtr<RendererImpl> weak_this_; | 240 base::WeakPtr<RendererImpl> weak_this_; |
206 base::WeakPtrFactory<RendererImpl> weak_factory_; | 241 base::WeakPtrFactory<RendererImpl> weak_factory_; |
207 | 242 |
208 DISALLOW_COPY_AND_ASSIGN(RendererImpl); | 243 DISALLOW_COPY_AND_ASSIGN(RendererImpl); |
209 }; | 244 }; |
210 | 245 |
211 } // namespace media | 246 } // namespace media |
212 | 247 |
213 #endif // MEDIA_RENDERERS_RENDERER_IMPL_H_ | 248 #endif // MEDIA_RENDERERS_RENDERER_IMPL_H_ |
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