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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 // |
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25 #include <stddef.h> | 25 #include <stddef.h> |
26 #include <stdint.h> | 26 #include <stdint.h> |
27 | 27 |
28 #include <memory> | 28 #include <memory> |
29 #include <string> | 29 #include <string> |
30 #include <utility> | 30 #include <utility> |
31 #include <vector> | 31 #include <vector> |
32 | 32 |
33 #include "base/callback.h" | 33 #include "base/callback.h" |
34 #include "base/macros.h" | 34 #include "base/macros.h" |
35 #include "base/memory/scoped_vector.h" | |
36 #include "base/threading/thread.h" | 35 #include "base/threading/thread.h" |
37 #include "media/base/audio_decoder_config.h" | 36 #include "media/base/audio_decoder_config.h" |
38 #include "media/base/decoder_buffer.h" | 37 #include "media/base/decoder_buffer.h" |
39 #include "media/base/decoder_buffer_queue.h" | 38 #include "media/base/decoder_buffer_queue.h" |
40 #include "media/base/demuxer.h" | 39 #include "media/base/demuxer.h" |
41 #include "media/base/pipeline_status.h" | 40 #include "media/base/pipeline_status.h" |
42 #include "media/base/text_track_config.h" | 41 #include "media/base/text_track_config.h" |
43 #include "media/base/video_decoder_config.h" | 42 #include "media/base/video_decoder_config.h" |
44 #include "media/ffmpeg/ffmpeg_deleters.h" | 43 #include "media/ffmpeg/ffmpeg_deleters.h" |
45 #include "media/filters/blocking_url_protocol.h" | 44 #include "media/filters/blocking_url_protocol.h" |
46 | 45 |
47 // FFmpeg forward declarations. | 46 // FFmpeg forward declarations. |
| 47 struct AVFormatContext; |
48 struct AVPacket; | 48 struct AVPacket; |
49 struct AVRational; | 49 struct AVRational; |
50 struct AVStream; | 50 struct AVStream; |
51 | 51 |
52 namespace media { | 52 namespace media { |
53 | 53 |
54 class MediaLog; | 54 class MediaLog; |
55 class FFmpegBitstreamConverter; | 55 class FFmpegBitstreamConverter; |
56 class FFmpegDemuxer; | 56 class FFmpegDemuxer; |
57 class FFmpegGlue; | 57 class FFmpegGlue; |
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242 base::TimeDelta start_time() const { return start_time_; } | 242 base::TimeDelta start_time() const { return start_time_; } |
243 | 243 |
244 private: | 244 private: |
245 // To allow tests access to privates. | 245 // To allow tests access to privates. |
246 friend class FFmpegDemuxerTest; | 246 friend class FFmpegDemuxerTest; |
247 | 247 |
248 // FFmpeg callbacks during initialization. | 248 // FFmpeg callbacks during initialization. |
249 void OnOpenContextDone(const PipelineStatusCB& status_cb, bool result); | 249 void OnOpenContextDone(const PipelineStatusCB& status_cb, bool result); |
250 void OnFindStreamInfoDone(const PipelineStatusCB& status_cb, int result); | 250 void OnFindStreamInfoDone(const PipelineStatusCB& status_cb, int result); |
251 | 251 |
| 252 void LogMetadata(AVFormatContext* avctx, base::TimeDelta max_duration); |
| 253 |
252 // FFmpeg callbacks during seeking. | 254 // FFmpeg callbacks during seeking. |
253 void OnSeekFrameDone(const PipelineStatusCB& cb, int result); | 255 void OnSeekFrameDone(const PipelineStatusCB& cb, int result); |
254 | 256 |
255 // FFmpeg callbacks during reading + helper method to initiate reads. | 257 // FFmpeg callbacks during reading + helper method to initiate reads. |
256 void ReadFrameIfNeeded(); | 258 void ReadFrameIfNeeded(); |
257 void OnReadFrameDone(ScopedAVPacket packet, int result); | 259 void OnReadFrameDone(ScopedAVPacket packet, int result); |
258 | 260 |
259 // Returns true iff any stream has additional capacity. Note that streams can | 261 // Returns true iff any stream has additional capacity. Note that streams can |
260 // go over capacity depending on how the file is muxed. | 262 // go over capacity depending on how the file is muxed. |
261 bool StreamsHaveAvailableCapacity(); | 263 bool StreamsHaveAvailableCapacity(); |
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298 | 300 |
299 // |streams_| mirrors the AVStream array in AVFormatContext. It contains | 301 // |streams_| mirrors the AVStream array in AVFormatContext. It contains |
300 // FFmpegDemuxerStreams encapsluating AVStream objects at the same index. | 302 // FFmpegDemuxerStreams encapsluating AVStream objects at the same index. |
301 // | 303 // |
302 // Since we only support a single audio and video stream, |streams_| will | 304 // Since we only support a single audio and video stream, |streams_| will |
303 // contain NULL entries for additional audio/video streams as well as for | 305 // contain NULL entries for additional audio/video streams as well as for |
304 // stream types that we do not currently support. | 306 // stream types that we do not currently support. |
305 // | 307 // |
306 // Once initialized, operations on FFmpegDemuxerStreams should be carried out | 308 // Once initialized, operations on FFmpegDemuxerStreams should be carried out |
307 // on the demuxer thread. | 309 // on the demuxer thread. |
308 typedef ScopedVector<FFmpegDemuxerStream> StreamVector; | 310 using StreamVector = std::vector<std::unique_ptr<FFmpegDemuxerStream>>; |
309 StreamVector streams_; | 311 StreamVector streams_; |
310 | 312 |
311 // Provides asynchronous IO to this demuxer. Consumed by |url_protocol_| to | 313 // Provides asynchronous IO to this demuxer. Consumed by |url_protocol_| to |
312 // integrate with libavformat. | 314 // integrate with libavformat. |
313 DataSource* data_source_; | 315 DataSource* data_source_; |
314 | 316 |
315 scoped_refptr<MediaLog> media_log_; | 317 scoped_refptr<MediaLog> media_log_; |
316 | 318 |
317 // Derived bitrate after initialization has completed. | 319 // Derived bitrate after initialization has completed. |
318 int bitrate_; | 320 int bitrate_; |
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340 bool duration_known_; | 342 bool duration_known_; |
341 | 343 |
342 // FFmpegURLProtocol implementation and corresponding glue bits. | 344 // FFmpegURLProtocol implementation and corresponding glue bits. |
343 std::unique_ptr<BlockingUrlProtocol> url_protocol_; | 345 std::unique_ptr<BlockingUrlProtocol> url_protocol_; |
344 std::unique_ptr<FFmpegGlue> glue_; | 346 std::unique_ptr<FFmpegGlue> glue_; |
345 | 347 |
346 const EncryptedMediaInitDataCB encrypted_media_init_data_cb_; | 348 const EncryptedMediaInitDataCB encrypted_media_init_data_cb_; |
347 | 349 |
348 const MediaTracksUpdatedCB media_tracks_updated_cb_; | 350 const MediaTracksUpdatedCB media_tracks_updated_cb_; |
349 | 351 |
350 std::map<MediaTrack::Id, const DemuxerStream*> track_id_to_demux_stream_map_; | 352 std::map<MediaTrack::Id, DemuxerStream*> track_id_to_demux_stream_map_; |
351 | 353 |
352 // NOTE: Weak pointers must be invalidated before all other member variables. | 354 // NOTE: Weak pointers must be invalidated before all other member variables. |
353 base::WeakPtrFactory<FFmpegDemuxer> weak_factory_; | 355 base::WeakPtrFactory<FFmpegDemuxer> weak_factory_; |
354 | 356 |
355 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer); | 357 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer); |
356 }; | 358 }; |
357 | 359 |
358 } // namespace media | 360 } // namespace media |
359 | 361 |
360 #endif // MEDIA_FILTERS_FFMPEG_DEMUXER_H_ | 362 #endif // MEDIA_FILTERS_FFMPEG_DEMUXER_H_ |
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