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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 // Implements the Demuxer interface using FFmpeg's libavformat. At this time | 5 // Implements the Demuxer interface using FFmpeg's libavformat. At this time |
6 // will support demuxing any audio/video format thrown at it. The streams | 6 // will support demuxing any audio/video format thrown at it. The streams |
7 // output mime types audio/x-ffmpeg and video/x-ffmpeg and include an integer | 7 // output mime types audio/x-ffmpeg and video/x-ffmpeg and include an integer |
8 // key FFmpegCodecID which contains the CodecID enumeration value. The CodecIDs | 8 // key FFmpegCodecID which contains the CodecID enumeration value. The CodecIDs |
9 // can be used to create and initialize the corresponding FFmpeg decoder. | 9 // can be used to create and initialize the corresponding FFmpeg decoder. |
10 // | 10 // |
11 // FFmpegDemuxer sets the duration of pipeline during initialization by using | 11 // FFmpegDemuxer sets the duration of pipeline during initialization by using |
12 // the duration of the longest audio/video stream. | 12 // the duration of the longest audio/video stream. |
13 // | 13 // |
14 // NOTE: since FFmpegDemuxer reads packets sequentially without seeking, media | 14 // NOTE: since FFmpegDemuxer reads packets sequentially without seeking, media |
15 // files with very large drift between audio/video streams may result in | 15 // files with very large drift between audio/video streams may result in |
16 // excessive memory consumption. | 16 // excessive memory consumption. |
17 // | 17 // |
18 // When stopped, FFmpegDemuxer and FFmpegDemuxerStream release all callbacks | 18 // When stopped, FFmpegDemuxer and FFmpegDemuxerStream release all callbacks |
19 // and buffered packets. Reads from a stopped FFmpegDemuxerStream will not be | 19 // and buffered packets. Reads from a stopped FFmpegDemuxerStream will not be |
20 // replied to. | 20 // replied to. |
21 | 21 |
22 #ifndef MEDIA_FILTERS_FFMPEG_DEMUXER_H_ | 22 #ifndef MEDIA_FILTERS_FFMPEG_DEMUXER_H_ |
23 #define MEDIA_FILTERS_FFMPEG_DEMUXER_H_ | 23 #define MEDIA_FILTERS_FFMPEG_DEMUXER_H_ |
24 | 24 |
25 #include <stddef.h> | 25 #include <stddef.h> |
26 #include <stdint.h> | 26 #include <stdint.h> |
27 | 27 |
28 #include <map> | |
29 #include <string> | 28 #include <string> |
30 #include <utility> | 29 #include <utility> |
31 #include <vector> | 30 #include <vector> |
32 | 31 |
33 #include "base/callback.h" | 32 #include "base/callback.h" |
34 #include "base/macros.h" | 33 #include "base/macros.h" |
35 #include "base/memory/scoped_ptr.h" | 34 #include "base/memory/scoped_ptr.h" |
36 #include "base/memory/scoped_vector.h" | 35 #include "base/memory/scoped_vector.h" |
37 #include "base/threading/thread.h" | 36 #include "base/threading/thread.h" |
38 #include "media/base/audio_decoder_config.h" | 37 #include "media/base/audio_decoder_config.h" |
39 #include "media/base/decoder_buffer.h" | 38 #include "media/base/decoder_buffer.h" |
40 #include "media/base/decoder_buffer_queue.h" | 39 #include "media/base/decoder_buffer_queue.h" |
41 #include "media/base/demuxer.h" | 40 #include "media/base/demuxer.h" |
42 #include "media/base/media_tracks.h" | |
43 #include "media/base/pipeline_status.h" | 41 #include "media/base/pipeline_status.h" |
44 #include "media/base/text_track_config.h" | 42 #include "media/base/text_track_config.h" |
45 #include "media/base/video_decoder_config.h" | 43 #include "media/base/video_decoder_config.h" |
46 #include "media/ffmpeg/ffmpeg_deleters.h" | 44 #include "media/ffmpeg/ffmpeg_deleters.h" |
47 #include "media/filters/blocking_url_protocol.h" | 45 #include "media/filters/blocking_url_protocol.h" |
48 | 46 |
49 // FFmpeg forward declarations. | 47 // FFmpeg forward declarations. |
50 struct AVPacket; | 48 struct AVPacket; |
51 struct AVRational; | 49 struct AVRational; |
52 struct AVStream; | 50 struct AVStream; |
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218 // Allow FFmpegDemuxerStream to notify us when there is updated information | 216 // Allow FFmpegDemuxerStream to notify us when there is updated information |
219 // about capacity and what buffered data is available. | 217 // about capacity and what buffered data is available. |
220 void NotifyCapacityAvailable(); | 218 void NotifyCapacityAvailable(); |
221 void NotifyBufferingChanged(); | 219 void NotifyBufferingChanged(); |
222 | 220 |
223 // The lowest demuxed timestamp. If negative, DemuxerStreams must use this to | 221 // The lowest demuxed timestamp. If negative, DemuxerStreams must use this to |
224 // adjust packet timestamps such that external clients see a zero-based | 222 // adjust packet timestamps such that external clients see a zero-based |
225 // timeline. | 223 // timeline. |
226 base::TimeDelta start_time() const { return start_time_; } | 224 base::TimeDelta start_time() const { return start_time_; } |
227 | 225 |
228 // Notifies the demuxer that track ids has been assigned to a media tracks. | |
229 void OnTrackIdsAssigned(const MediaTracks& tracks, | |
230 const std::vector<unsigned>& track_ids) override; | |
231 | |
232 // Finds a DemuxerStream corresponding to the given blink |track_id|. Note | |
233 // that the input track id is blink track id and not bytestream track id. | |
234 const DemuxerStream* GetDemuxerStreamByTrackId( | |
235 unsigned track_id) const override; | |
236 | |
237 private: | 226 private: |
238 // To allow tests access to privates. | 227 // To allow tests access to privates. |
239 friend class FFmpegDemuxerTest; | 228 friend class FFmpegDemuxerTest; |
240 | 229 |
241 // FFmpeg callbacks during initialization. | 230 // FFmpeg callbacks during initialization. |
242 void OnOpenContextDone(const PipelineStatusCB& status_cb, bool result); | 231 void OnOpenContextDone(const PipelineStatusCB& status_cb, bool result); |
243 void OnFindStreamInfoDone(const PipelineStatusCB& status_cb, int result); | 232 void OnFindStreamInfoDone(const PipelineStatusCB& status_cb, int result); |
244 | 233 |
245 // FFmpeg callbacks during seeking. | 234 // FFmpeg callbacks during seeking. |
246 void OnSeekFrameDone(const PipelineStatusCB& cb, int result); | 235 void OnSeekFrameDone(const PipelineStatusCB& cb, int result); |
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338 bool duration_known_; | 327 bool duration_known_; |
339 | 328 |
340 // FFmpegURLProtocol implementation and corresponding glue bits. | 329 // FFmpegURLProtocol implementation and corresponding glue bits. |
341 scoped_ptr<BlockingUrlProtocol> url_protocol_; | 330 scoped_ptr<BlockingUrlProtocol> url_protocol_; |
342 scoped_ptr<FFmpegGlue> glue_; | 331 scoped_ptr<FFmpegGlue> glue_; |
343 | 332 |
344 const EncryptedMediaInitDataCB encrypted_media_init_data_cb_; | 333 const EncryptedMediaInitDataCB encrypted_media_init_data_cb_; |
345 | 334 |
346 const MediaTracksUpdatedCB media_tracks_updated_cb_; | 335 const MediaTracksUpdatedCB media_tracks_updated_cb_; |
347 | 336 |
348 MediaTracks::TrackIdToDemuxStreamMap track_id_to_demux_stream_; | |
349 | |
350 // NOTE: Weak pointers must be invalidated before all other member variables. | 337 // NOTE: Weak pointers must be invalidated before all other member variables. |
351 base::WeakPtrFactory<FFmpegDemuxer> weak_factory_; | 338 base::WeakPtrFactory<FFmpegDemuxer> weak_factory_; |
352 | 339 |
353 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer); | 340 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer); |
354 }; | 341 }; |
355 | 342 |
356 } // namespace media | 343 } // namespace media |
357 | 344 |
358 #endif // MEDIA_FILTERS_FFMPEG_DEMUXER_H_ | 345 #endif // MEDIA_FILTERS_FFMPEG_DEMUXER_H_ |
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