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| 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2009 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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| 135 // Carries out demuxing and satisfying stream reads on the demuxer thread. | 135 // Carries out demuxing and satisfying stream reads on the demuxer thread. |
| 136 void DemuxTask(); | 136 void DemuxTask(); |
| 137 | 137 |
| 138 // Returns true if any of the streams have pending reads. Since we lazily | 138 // Returns true if any of the streams have pending reads. Since we lazily |
| 139 // post a DemuxTask() for every read, we use this method to quickly terminate | 139 // post a DemuxTask() for every read, we use this method to quickly terminate |
| 140 // the tasks if there is no work to do. | 140 // the tasks if there is no work to do. |
| 141 // | 141 // |
| 142 // Safe to call on any thread. | 142 // Safe to call on any thread. |
| 143 bool StreamsHavePendingReads(); | 143 bool StreamsHavePendingReads(); |
| 144 | 144 |
| 145 // Signal all FFmpegDemuxerStream that the stream has ended. |
| 146 void StreamHasEnded(); |
| 147 |
| 145 // Helper function to deep copy an AVPacket's data, size and timestamps. | 148 // Helper function to deep copy an AVPacket's data, size and timestamps. |
| 146 // Returns NULL if a packet could not be cloned (i.e., out of memory). | 149 // Returns NULL if a packet could not be cloned (i.e., out of memory). |
| 147 AVPacket* ClonePacket(AVPacket* packet); | 150 AVPacket* ClonePacket(AVPacket* packet); |
| 148 | 151 |
| 149 // FFmpeg context handle. | 152 // FFmpeg context handle. |
| 150 scoped_ptr_malloc<AVFormatContext, ScopedPtrAVFree> format_context_; | 153 scoped_ptr_malloc<AVFormatContext, ScopedPtrAVFree> format_context_; |
| 151 | 154 |
| 152 // Latest timestamp read on the demuxer thread. | 155 // Latest timestamp read on the demuxer thread. |
| 153 base::TimeDelta current_timestamp_; | 156 base::TimeDelta current_timestamp_; |
| 154 | 157 |
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| 166 | 169 |
| 167 // Thread handle. | 170 // Thread handle. |
| 168 base::Thread thread_; | 171 base::Thread thread_; |
| 169 | 172 |
| 170 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer); | 173 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer); |
| 171 }; | 174 }; |
| 172 | 175 |
| 173 } // namespace media | 176 } // namespace media |
| 174 | 177 |
| 175 #endif // MEDIA_FILTERS_FFMPEG_DEMUXER_H_ | 178 #endif // MEDIA_FILTERS_FFMPEG_DEMUXER_H_ |
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