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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 // will post ReadTask to execute on demuxer's thread. Read will acquire | 77 // will post ReadTask to execute on demuxer's thread. Read will acquire |
| 78 // |lock_| for the life of the function so that means |read_cb| must | 78 // |lock_| for the life of the function so that means |read_cb| must |
| 79 // not make calls into FFmpegDemuxerStream directly or that may cause a | 79 // not make calls into FFmpegDemuxerStream directly or that may cause a |
| 80 // deadlock. |read_cb| should execute as quickly as possible because | 80 // deadlock. |read_cb| should execute as quickly as possible because |
| 81 // |lock_| is held throughout the life of the callback. | 81 // |lock_| is held throughout the life of the callback. |
| 82 virtual void Read(const ReadCB& read_cb) OVERRIDE; | 82 virtual void Read(const ReadCB& read_cb) OVERRIDE; |
| 83 virtual void EnableBitstreamConverter() OVERRIDE; | 83 virtual void EnableBitstreamConverter() OVERRIDE; |
| 84 virtual const AudioDecoderConfig& audio_decoder_config() OVERRIDE; | 84 virtual const AudioDecoderConfig& audio_decoder_config() OVERRIDE; |
| 85 virtual const VideoDecoderConfig& video_decoder_config() OVERRIDE; | 85 virtual const VideoDecoderConfig& video_decoder_config() OVERRIDE; |
| 86 | 86 |
| 87 protected: |
| 88 virtual ~FFmpegDemuxerStream(); |
| 89 |
| 87 private: | 90 private: |
| 88 friend class FFmpegDemuxerTest; | 91 friend class FFmpegDemuxerTest; |
| 89 virtual ~FFmpegDemuxerStream(); | |
| 90 | 92 |
| 91 // Carries out enqueuing a pending read on the demuxer thread. | 93 // Carries out enqueuing a pending read on the demuxer thread. |
| 92 void ReadTask(const ReadCB& read_cb); | 94 void ReadTask(const ReadCB& read_cb); |
| 93 | 95 |
| 94 // Attempts to fulfill a single pending read by dequeueing a buffer and read | 96 // Attempts to fulfill a single pending read by dequeueing a buffer and read |
| 95 // callback pair and executing the callback. The calling function must | 97 // callback pair and executing the callback. The calling function must |
| 96 // acquire |lock_| before calling this function. | 98 // acquire |lock_| before calling this function. |
| 97 void FulfillPendingRead(); | 99 void FulfillPendingRead(); |
| 98 | 100 |
| 99 // Converts an FFmpeg stream timestamp into a base::TimeDelta. | 101 // Converts an FFmpeg stream timestamp into a base::TimeDelta. |
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| 125 // |read_queue_|, or |stopped_|. | 127 // |read_queue_|, or |stopped_|. |
| 126 base::Lock lock_; | 128 base::Lock lock_; |
| 127 | 129 |
| 128 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxerStream); | 130 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxerStream); |
| 129 }; | 131 }; |
| 130 | 132 |
| 131 class MEDIA_EXPORT FFmpegDemuxer : public Demuxer, public FFmpegURLProtocol { | 133 class MEDIA_EXPORT FFmpegDemuxer : public Demuxer, public FFmpegURLProtocol { |
| 132 public: | 134 public: |
| 133 FFmpegDemuxer(MessageLoop* message_loop, | 135 FFmpegDemuxer(MessageLoop* message_loop, |
| 134 const scoped_refptr<DataSource>& data_source); | 136 const scoped_refptr<DataSource>& data_source); |
| 135 virtual ~FFmpegDemuxer(); | |
| 136 | 137 |
| 137 // Posts a task to perform additional demuxing. | 138 // Posts a task to perform additional demuxing. |
| 138 virtual void PostDemuxTask(); | 139 virtual void PostDemuxTask(); |
| 139 | 140 |
| 140 // Demuxer implementation. | 141 // Demuxer implementation. |
| 141 virtual void Initialize(DemuxerHost* host, | 142 virtual void Initialize(DemuxerHost* host, |
| 142 const PipelineStatusCB& status_cb) OVERRIDE; | 143 const PipelineStatusCB& status_cb) OVERRIDE; |
| 143 virtual void Stop(const base::Closure& callback) OVERRIDE; | 144 virtual void Stop(const base::Closure& callback) OVERRIDE; |
| 144 virtual void Seek(base::TimeDelta time, const PipelineStatusCB& cb) OVERRIDE; | 145 virtual void Seek(base::TimeDelta time, const PipelineStatusCB& cb) OVERRIDE; |
| 145 virtual void OnAudioRendererDisabled() OVERRIDE; | 146 virtual void OnAudioRendererDisabled() OVERRIDE; |
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| 156 virtual bool GetSize(int64* size_out) OVERRIDE; | 157 virtual bool GetSize(int64* size_out) OVERRIDE; |
| 157 virtual bool IsStreaming() OVERRIDE; | 158 virtual bool IsStreaming() OVERRIDE; |
| 158 | 159 |
| 159 // Provide access to FFmpegDemuxerStream. | 160 // Provide access to FFmpegDemuxerStream. |
| 160 MessageLoop* message_loop(); | 161 MessageLoop* message_loop(); |
| 161 | 162 |
| 162 private: | 163 private: |
| 163 // To allow tests access to privates. | 164 // To allow tests access to privates. |
| 164 friend class FFmpegDemuxerTest; | 165 friend class FFmpegDemuxerTest; |
| 165 | 166 |
| 167 virtual ~FFmpegDemuxer(); |
| 168 |
| 166 // Carries out initialization on the demuxer thread. | 169 // Carries out initialization on the demuxer thread. |
| 167 void InitializeTask(DemuxerHost* host, const PipelineStatusCB& status_cb); | 170 void InitializeTask(DemuxerHost* host, const PipelineStatusCB& status_cb); |
| 168 | 171 |
| 169 // Carries out a seek on the demuxer thread. | 172 // Carries out a seek on the demuxer thread. |
| 170 void SeekTask(base::TimeDelta time, const PipelineStatusCB& cb); | 173 void SeekTask(base::TimeDelta time, const PipelineStatusCB& cb); |
| 171 | 174 |
| 172 // Carries out demuxing and satisfying stream reads on the demuxer thread. | 175 // Carries out demuxing and satisfying stream reads on the demuxer thread. |
| 173 void DemuxTask(); | 176 void DemuxTask(); |
| 174 | 177 |
| 175 // Carries out stopping the demuxer streams on the demuxer thread. | 178 // Carries out stopping the demuxer streams on the demuxer thread. |
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| 243 // Whether audio has been disabled for this demuxer (in which case this class | 246 // Whether audio has been disabled for this demuxer (in which case this class |
| 244 // drops packets destined for AUDIO demuxer streams on the floor). | 247 // drops packets destined for AUDIO demuxer streams on the floor). |
| 245 bool audio_disabled_; | 248 bool audio_disabled_; |
| 246 | 249 |
| 247 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer); | 250 DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer); |
| 248 }; | 251 }; |
| 249 | 252 |
| 250 } // namespace media | 253 } // namespace media |
| 251 | 254 |
| 252 #endif // MEDIA_FILTERS_FFMPEG_DEMUXER_H_ | 255 #endif // MEDIA_FILTERS_FFMPEG_DEMUXER_H_ |
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