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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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| 79 | 79 |
| 80 // Enables fixes for ogg files with negative timestamps. For AUDIO streams, | 80 // Enables fixes for ogg files with negative timestamps. For AUDIO streams, |
| 81 // all packets with negative timestamps will be marked for post-decode | 81 // all packets with negative timestamps will be marked for post-decode |
| 82 // discard. For all other stream types, if FFmpegDemuxer::start_time() is | 82 // discard. For all other stream types, if FFmpegDemuxer::start_time() is |
| 83 // negative, it will not be used to shift timestamps during EnqueuePacket(). | 83 // negative, it will not be used to shift timestamps during EnqueuePacket(). |
| 84 void enable_negative_timestamp_fixups_for_ogg() { | 84 void enable_negative_timestamp_fixups_for_ogg() { |
| 85 fixup_negative_ogg_timestamps_ = true; | 85 fixup_negative_ogg_timestamps_ = true; |
| 86 } | 86 } |
| 87 | 87 |
| 88 // DemuxerStream implementation. | 88 // DemuxerStream implementation. |
| 89 virtual Type type() OVERRIDE; | 89 virtual Type type() override; |
| 90 virtual void Read(const ReadCB& read_cb) OVERRIDE; | 90 virtual void Read(const ReadCB& read_cb) override; |
| 91 virtual void EnableBitstreamConverter() OVERRIDE; | 91 virtual void EnableBitstreamConverter() override; |
| 92 virtual bool SupportsConfigChanges() OVERRIDE; | 92 virtual bool SupportsConfigChanges() override; |
| 93 virtual AudioDecoderConfig audio_decoder_config() OVERRIDE; | 93 virtual AudioDecoderConfig audio_decoder_config() override; |
| 94 virtual VideoDecoderConfig video_decoder_config() OVERRIDE; | 94 virtual VideoDecoderConfig video_decoder_config() override; |
| 95 virtual VideoRotation video_rotation() OVERRIDE; | 95 virtual VideoRotation video_rotation() override; |
| 96 | 96 |
| 97 // Returns the range of buffered data in this stream. | 97 // Returns the range of buffered data in this stream. |
| 98 Ranges<base::TimeDelta> GetBufferedRanges() const; | 98 Ranges<base::TimeDelta> GetBufferedRanges() const; |
| 99 | 99 |
| 100 // Returns elapsed time based on the already queued packets. | 100 // Returns elapsed time based on the already queued packets. |
| 101 // Used to determine stream duration when it's not known ahead of time. | 101 // Used to determine stream duration when it's not known ahead of time. |
| 102 base::TimeDelta GetElapsedTime() const; | 102 base::TimeDelta GetElapsedTime() const; |
| 103 | 103 |
| 104 // Returns true if this stream has capacity for additional data. | 104 // Returns true if this stream has capacity for additional data. |
| 105 bool HasAvailableCapacity(); | 105 bool HasAvailableCapacity(); |
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| 156 public: | 156 public: |
| 157 FFmpegDemuxer(const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, | 157 FFmpegDemuxer(const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, |
| 158 DataSource* data_source, | 158 DataSource* data_source, |
| 159 const NeedKeyCB& need_key_cb, | 159 const NeedKeyCB& need_key_cb, |
| 160 const scoped_refptr<MediaLog>& media_log); | 160 const scoped_refptr<MediaLog>& media_log); |
| 161 virtual ~FFmpegDemuxer(); | 161 virtual ~FFmpegDemuxer(); |
| 162 | 162 |
| 163 // Demuxer implementation. | 163 // Demuxer implementation. |
| 164 virtual void Initialize(DemuxerHost* host, | 164 virtual void Initialize(DemuxerHost* host, |
| 165 const PipelineStatusCB& status_cb, | 165 const PipelineStatusCB& status_cb, |
| 166 bool enable_text_tracks) OVERRIDE; | 166 bool enable_text_tracks) override; |
| 167 virtual void Stop() OVERRIDE; | 167 virtual void Stop() override; |
| 168 virtual void Seek(base::TimeDelta time, const PipelineStatusCB& cb) OVERRIDE; | 168 virtual void Seek(base::TimeDelta time, const PipelineStatusCB& cb) override; |
| 169 virtual base::Time GetTimelineOffset() const OVERRIDE; | 169 virtual base::Time GetTimelineOffset() const override; |
| 170 virtual DemuxerStream* GetStream(DemuxerStream::Type type) OVERRIDE; | 170 virtual DemuxerStream* GetStream(DemuxerStream::Type type) override; |
| 171 virtual base::TimeDelta GetStartTime() const OVERRIDE; | 171 virtual base::TimeDelta GetStartTime() const override; |
| 172 virtual Liveness GetLiveness() const OVERRIDE; | 172 virtual Liveness GetLiveness() const override; |
| 173 | 173 |
| 174 // Calls |need_key_cb_| with the initialization data encountered in the file. | 174 // Calls |need_key_cb_| with the initialization data encountered in the file. |
| 175 void FireNeedKey(const std::string& init_data_type, | 175 void FireNeedKey(const std::string& init_data_type, |
| 176 const std::string& encryption_key_id); | 176 const std::string& encryption_key_id); |
| 177 | 177 |
| 178 // Allow FFmpegDemuxerStream to notify us when there is updated information | 178 // Allow FFmpegDemuxerStream to notify us when there is updated information |
| 179 // about capacity and what buffered data is available. | 179 // about capacity and what buffered data is available. |
| 180 void NotifyCapacityAvailable(); | 180 void NotifyCapacityAvailable(); |
| 181 void NotifyBufferingChanged(); | 181 void NotifyBufferingChanged(); |
| 182 | 182 |
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| 297 | 297 |
| 298 // NOTE: Weak pointers must be invalidated before all other member variables. | 298 // NOTE: Weak pointers must be invalidated before all other member variables. |
| 299 base::WeakPtrFactory<FFmpegDemuxer> weak_factory_; | 299 base::WeakPtrFactory<FFmpegDemuxer> weak_factory_; |
| 300 | 300 |
| 301 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer); | 301 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer); |
| 302 }; | 302 }; |
| 303 | 303 |
| 304 } // namespace media | 304 } // namespace media |
| 305 | 305 |
| 306 #endif // MEDIA_FILTERS_FFMPEG_DEMUXER_H_ | 306 #endif // MEDIA_FILTERS_FFMPEG_DEMUXER_H_ |
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