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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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_FILTERS_CHUNK_DEMUXER_H_ | 5 #ifndef MEDIA_FILTERS_CHUNK_DEMUXER_H_ |
6 #define MEDIA_FILTERS_CHUNK_DEMUXER_H_ | 6 #define MEDIA_FILTERS_CHUNK_DEMUXER_H_ |
7 | 7 |
8 #include <deque> | 8 #include <deque> |
9 #include <map> | 9 #include <map> |
10 #include <string> | 10 #include <string> |
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49 // Removes buffers between |start| and |end| according to the steps | 49 // Removes buffers between |start| and |end| according to the steps |
50 // in the "Coded Frame Removal Algorithm" in the Media Source | 50 // in the "Coded Frame Removal Algorithm" in the Media Source |
51 // Extensions Spec. | 51 // Extensions Spec. |
52 // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-sourc
e.html#sourcebuffer-coded-frame-removal | 52 // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-sourc
e.html#sourcebuffer-coded-frame-removal |
53 // | 53 // |
54 // |duration| is the current duration of the presentation. It is | 54 // |duration| is the current duration of the presentation. It is |
55 // required by the computation outlined in the spec. | 55 // required by the computation outlined in the spec. |
56 void Remove(base::TimeDelta start, base::TimeDelta end, | 56 void Remove(base::TimeDelta start, base::TimeDelta end, |
57 base::TimeDelta duration); | 57 base::TimeDelta duration); |
58 | 58 |
| 59 // If the buffer is full, runs Frame Removal to try to free up space, as |
| 60 // specified in the "Coded Frame Eviction Algorithm" in the Media Source |
| 61 // Extensions Spec. Returns false iff buffer is still full after running |
| 62 // eviction |
| 63 // https://w3c.github.io/media-source/#sourcebuffer-coded-frame-eviction |
| 64 bool EvictFrames(DecodeTimestamp media_time); |
| 65 |
59 // Signal to the stream that duration has changed to |duration|. | 66 // Signal to the stream that duration has changed to |duration|. |
60 void OnSetDuration(base::TimeDelta duration); | 67 void OnSetDuration(base::TimeDelta duration); |
61 | 68 |
62 // Returns the range of buffered data in this stream, capped at |duration|. | 69 // Returns the range of buffered data in this stream, capped at |duration|. |
63 Ranges<base::TimeDelta> GetBufferedRanges(base::TimeDelta duration) const; | 70 Ranges<base::TimeDelta> GetBufferedRanges(base::TimeDelta duration) const; |
64 | 71 |
65 // Returns the duration of the buffered data. | 72 // Returns the duration of the buffered data. |
66 // Returns base::TimeDelta() if the stream has no buffered data. | 73 // Returns base::TimeDelta() if the stream has no buffered data. |
67 base::TimeDelta GetBufferedDuration() const; | 74 base::TimeDelta GetBufferedDuration() const; |
68 | 75 |
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156 // |splice_frames_enabled| Indicates that it's okay to generate splice frames | 163 // |splice_frames_enabled| Indicates that it's okay to generate splice frames |
157 // per the MSE specification. Renderers must understand DecoderBuffer's | 164 // per the MSE specification. Renderers must understand DecoderBuffer's |
158 // splice_timestamp() field. | 165 // splice_timestamp() field. |
159 ChunkDemuxer(const base::Closure& open_cb, | 166 ChunkDemuxer(const base::Closure& open_cb, |
160 const EncryptedMediaInitDataCB& encrypted_media_init_data_cb, | 167 const EncryptedMediaInitDataCB& encrypted_media_init_data_cb, |
161 const LogCB& log_cb, | 168 const LogCB& log_cb, |
162 const scoped_refptr<MediaLog>& media_log, | 169 const scoped_refptr<MediaLog>& media_log, |
163 bool splice_frames_enabled); | 170 bool splice_frames_enabled); |
164 ~ChunkDemuxer() override; | 171 ~ChunkDemuxer() override; |
165 | 172 |
| 173 // Set the media time provider. |
| 174 // TODO(damienv): should truly be part of the constructor. |
| 175 void SetMediaTimeProvider( |
| 176 const base::Callback<base::TimeDelta(void)>& get_media_time_cb); |
| 177 |
166 // Demuxer implementation. | 178 // Demuxer implementation. |
167 void Initialize(DemuxerHost* host, | 179 void Initialize(DemuxerHost* host, |
168 const PipelineStatusCB& cb, | 180 const PipelineStatusCB& cb, |
169 bool enable_text_tracks) override; | 181 bool enable_text_tracks) override; |
170 void Stop() override; | 182 void Stop() override; |
171 void Seek(base::TimeDelta time, const PipelineStatusCB& cb) override; | 183 void Seek(base::TimeDelta time, const PipelineStatusCB& cb) override; |
172 base::Time GetTimelineOffset() const override; | 184 base::Time GetTimelineOffset() const override; |
173 DemuxerStream* GetStream(DemuxerStream::Type type) override; | 185 DemuxerStream* GetStream(DemuxerStream::Type type) override; |
174 base::TimeDelta GetStartTime() const override; | 186 base::TimeDelta GetStartTime() const override; |
175 | 187 |
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235 void Abort(const std::string& id, | 247 void Abort(const std::string& id, |
236 base::TimeDelta append_window_start, | 248 base::TimeDelta append_window_start, |
237 base::TimeDelta append_window_end, | 249 base::TimeDelta append_window_end, |
238 base::TimeDelta* timestamp_offset); | 250 base::TimeDelta* timestamp_offset); |
239 | 251 |
240 // Remove buffers between |start| and |end| for the source buffer | 252 // Remove buffers between |start| and |end| for the source buffer |
241 // associated with |id|. | 253 // associated with |id|. |
242 void Remove(const std::string& id, base::TimeDelta start, | 254 void Remove(const std::string& id, base::TimeDelta start, |
243 base::TimeDelta end); | 255 base::TimeDelta end); |
244 | 256 |
| 257 bool EvictFrames(); |
| 258 |
245 // Returns the current presentation duration. | 259 // Returns the current presentation duration. |
246 double GetDuration(); | 260 double GetDuration(); |
247 double GetDuration_Locked(); | 261 double GetDuration_Locked(); |
248 | 262 |
249 // Notifies the demuxer that the duration of the media has changed to | 263 // Notifies the demuxer that the duration of the media has changed to |
250 // |duration|. | 264 // |duration|. |
251 void SetDuration(double duration); | 265 void SetDuration(double duration); |
252 | 266 |
253 // Returns true if the source buffer associated with |id| is currently parsing | 267 // Returns true if the source buffer associated with |id| is currently parsing |
254 // a media segment, or false otherwise. | 268 // a media segment, or false otherwise. |
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369 PipelineStatusCB init_cb_; | 383 PipelineStatusCB init_cb_; |
370 // Callback to execute upon seek completion. | 384 // Callback to execute upon seek completion. |
371 // TODO(wolenetz/acolwell): Protect against possible double-locking by first | 385 // TODO(wolenetz/acolwell): Protect against possible double-locking by first |
372 // releasing |lock_| before executing this callback. See | 386 // releasing |lock_| before executing this callback. See |
373 // http://crbug.com/308226 | 387 // http://crbug.com/308226 |
374 PipelineStatusCB seek_cb_; | 388 PipelineStatusCB seek_cb_; |
375 | 389 |
376 scoped_ptr<ChunkDemuxerStream> audio_; | 390 scoped_ptr<ChunkDemuxerStream> audio_; |
377 scoped_ptr<ChunkDemuxerStream> video_; | 391 scoped_ptr<ChunkDemuxerStream> video_; |
378 | 392 |
| 393 base::Callback<base::TimeDelta(void)> get_media_time_cb_; |
| 394 |
379 base::TimeDelta duration_; | 395 base::TimeDelta duration_; |
380 | 396 |
381 // The duration passed to the last SetDuration(). If | 397 // The duration passed to the last SetDuration(). If |
382 // SetDuration() is never called or an AppendData() call or | 398 // SetDuration() is never called or an AppendData() call or |
383 // a EndOfStream() call changes |duration_|, then this | 399 // a EndOfStream() call changes |duration_|, then this |
384 // variable is set to < 0 to indicate that the |duration_| represents | 400 // variable is set to < 0 to indicate that the |duration_| represents |
385 // the actual duration instead of a user specified value. | 401 // the actual duration instead of a user specified value. |
386 double user_specified_duration_; | 402 double user_specified_duration_; |
387 | 403 |
388 base::Time timeline_offset_; | 404 base::Time timeline_offset_; |
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399 | 415 |
400 // Indicates that splice frame generation is enabled. | 416 // Indicates that splice frame generation is enabled. |
401 const bool splice_frames_enabled_; | 417 const bool splice_frames_enabled_; |
402 | 418 |
403 DISALLOW_COPY_AND_ASSIGN(ChunkDemuxer); | 419 DISALLOW_COPY_AND_ASSIGN(ChunkDemuxer); |
404 }; | 420 }; |
405 | 421 |
406 } // namespace media | 422 } // namespace media |
407 | 423 |
408 #endif // MEDIA_FILTERS_CHUNK_DEMUXER_H_ | 424 #endif // MEDIA_FILTERS_CHUNK_DEMUXER_H_ |
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