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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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77 // If |buffer_queue_| is not empty will execute on caller's thread, otherwise | 77 // If |buffer_queue_| is not empty will execute on caller's thread, otherwise |
78 // will post ReadTask to execute on demuxer's thread. Read will acquire | 78 // will post ReadTask to execute on demuxer's thread. Read will acquire |
79 // |lock_| for the life of the function so that means |read_cb| must | 79 // |lock_| for the life of the function so that means |read_cb| must |
80 // not make calls into FFmpegDemuxerStream directly or that may cause a | 80 // not make calls into FFmpegDemuxerStream directly or that may cause a |
81 // deadlock. |read_cb| should execute as quickly as possible because | 81 // deadlock. |read_cb| should execute as quickly as possible because |
82 // |lock_| is held throughout the life of the callback. | 82 // |lock_| is held throughout the life of the callback. |
83 virtual void Read(const ReadCB& read_cb) OVERRIDE; | 83 virtual void Read(const ReadCB& read_cb) OVERRIDE; |
84 virtual void EnableBitstreamConverter() OVERRIDE; | 84 virtual void EnableBitstreamConverter() OVERRIDE; |
85 virtual const AudioDecoderConfig& audio_decoder_config() OVERRIDE; | 85 virtual const AudioDecoderConfig& audio_decoder_config() OVERRIDE; |
86 virtual const VideoDecoderConfig& video_decoder_config() OVERRIDE; | 86 virtual const VideoDecoderConfig& video_decoder_config() OVERRIDE; |
87 virtual Ranges<base::TimeDelta> GetBufferedRanges() OVERRIDE; | 87 |
| 88 // Returns the range of buffered data in this stream. |
| 89 Ranges<base::TimeDelta> GetBufferedRanges() const; |
88 | 90 |
89 // Returns elapsed time based on the already queued packets. | 91 // Returns elapsed time based on the already queued packets. |
90 // Used to determine stream duration when it's not known ahead of time. | 92 // Used to determine stream duration when it's not known ahead of time. |
91 base::TimeDelta GetElapsedTime() const; | 93 base::TimeDelta GetElapsedTime() const; |
92 | 94 |
93 protected: | 95 protected: |
94 virtual ~FFmpegDemuxerStream(); | 96 virtual ~FFmpegDemuxerStream(); |
95 | 97 |
96 private: | 98 private: |
97 friend class FFmpegDemuxerTest; | 99 friend class FFmpegDemuxerTest; |
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203 // Must be called on the demuxer thread. | 205 // Must be called on the demuxer thread. |
204 void StreamHasEnded(); | 206 void StreamHasEnded(); |
205 | 207 |
206 // Wait for asynchronous read to complete and return number of bytes read. | 208 // Wait for asynchronous read to complete and return number of bytes read. |
207 virtual int WaitForRead(); | 209 virtual int WaitForRead(); |
208 | 210 |
209 // Signal the blocked thread that the read has completed, with |size| bytes | 211 // Signal the blocked thread that the read has completed, with |size| bytes |
210 // read or kReadError in case of error. | 212 // read or kReadError in case of error. |
211 virtual void SignalReadCompleted(int size); | 213 virtual void SignalReadCompleted(int size); |
212 | 214 |
| 215 // Returns the stream from |streams_| that matches |type| as an |
| 216 // FFmpegDemuxerStream. |
| 217 scoped_refptr<FFmpegDemuxerStream> GetFFmpegStream( |
| 218 DemuxerStream::Type type) const; |
| 219 |
213 DemuxerHost* host_; | 220 DemuxerHost* host_; |
214 | 221 |
215 MessageLoop* message_loop_; | 222 MessageLoop* message_loop_; |
216 | 223 |
217 // FFmpeg context handle. | 224 // FFmpeg context handle. |
218 AVFormatContext* format_context_; | 225 AVFormatContext* format_context_; |
219 | 226 |
220 // |streams_| mirrors the AVStream array in |format_context_|. It contains | 227 // |streams_| mirrors the AVStream array in |format_context_|. It contains |
221 // FFmpegDemuxerStreams encapsluating AVStream objects at the same index. | 228 // FFmpegDemuxerStreams encapsluating AVStream objects at the same index. |
222 // | 229 // |
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260 // Set if we know duration of the audio stream. Used when processing end of | 267 // Set if we know duration of the audio stream. Used when processing end of |
261 // stream -- at this moment we definitely know duration. | 268 // stream -- at this moment we definitely know duration. |
262 bool duration_known_; | 269 bool duration_known_; |
263 | 270 |
264 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer); | 271 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer); |
265 }; | 272 }; |
266 | 273 |
267 } // namespace media | 274 } // namespace media |
268 | 275 |
269 #endif // MEDIA_FILTERS_FFMPEG_DEMUXER_H_ | 276 #endif // MEDIA_FILTERS_FFMPEG_DEMUXER_H_ |
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