| // Copyright 2012 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef COBALT_MEDIA_FILTERS_SHELL_DEMUXER_H_ |
| #define COBALT_MEDIA_FILTERS_SHELL_DEMUXER_H_ |
| |
| #include <deque> |
| #include <string> |
| #include <vector> |
| |
| #include "base/logging.h" |
| #include "base/message_loop.h" |
| #include "base/threading/thread.h" |
| #include "cobalt/media/base/demuxer.h" |
| #include "cobalt/media/base/demuxer_stream.h" |
| #include "cobalt/media/base/media_log.h" |
| #include "cobalt/media/base/ranges.h" |
| #include "cobalt/media/filters/shell_parser.h" |
| |
| namespace media { |
| |
| class DecoderBuffer; |
| class ShellDemuxer; |
| |
| class ShellDemuxerStream : public DemuxerStream { |
| public: |
| ShellDemuxerStream(ShellDemuxer* demuxer, Type type); |
| |
| // DemuxerStream implementation |
| void Read(const ReadCB& read_cb) OVERRIDE; |
| AudioDecoderConfig audio_decoder_config() OVERRIDE; |
| VideoDecoderConfig video_decoder_config() OVERRIDE; |
| Type type() const OVERRIDE; |
| void EnableBitstreamConverter() OVERRIDE; |
| bool SupportsConfigChanges() OVERRIDE { return false; } |
| VideoRotation video_rotation() OVERRIDE { return VIDEO_ROTATION_0; } |
| bool enabled() const OVERRIDE { return true; } |
| void set_enabled(bool enabled, base::TimeDelta timestamp) OVERRIDE { |
| DCHECK(enabled); |
| } |
| void SetStreamStatusChangeCB(const StreamStatusChangeCB& cb) OVERRIDE { |
| NOTREACHED(); |
| } |
| |
| // Functions used by ShellDemuxer |
| Ranges<base::TimeDelta> GetBufferedRanges(); |
| void EnqueueBuffer(scoped_refptr<DecoderBuffer> buffer); |
| void FlushBuffers(); |
| void Stop(); |
| base::TimeDelta GetLastBufferTimestamp() const; |
| |
| private: |
| // The Ranges object doesn't offer a complement object so we rebuild |
| // enqueued ranges from the union of all of the buffers in the queue. |
| // Call me whenever _removing_ data from buffer_queue_. |
| void RebuildEnqueuedRanges_Locked(); |
| |
| // non-owning pointer to avoid circular reference |
| ShellDemuxer* demuxer_; |
| Type type_; |
| |
| // Used to protect everything below. |
| mutable base::Lock lock_; |
| // Keeps track of all time ranges this object has seen since creation. |
| // The demuxer uses these ranges to update the pipeline about what data |
| // it has demuxed. |
| Ranges<base::TimeDelta> buffered_ranges_; |
| // The last timestamp of buffer enqueued. This is used in two places: |
| // 1. Used with the timestamp of the current frame to calculate the |
| // buffer range. |
| // 2. Used by the demuxer to deteminate what type of frame to get next. |
| base::TimeDelta last_buffer_timestamp_; |
| bool stopped_; |
| |
| typedef std::deque<scoped_refptr<DecoderBuffer> > BufferQueue; |
| BufferQueue buffer_queue_; |
| |
| typedef std::deque<ReadCB> ReadQueue; |
| ReadQueue read_queue_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ShellDemuxerStream); |
| }; |
| |
| class MEDIA_EXPORT ShellDemuxer : public Demuxer { |
| public: |
| ShellDemuxer(const scoped_refptr<base::MessageLoopProxy>& message_loop, |
| DataSource* data_source, |
| const scoped_refptr<MediaLog>& media_log); |
| ~ShellDemuxer() OVERRIDE; |
| |
| // Demuxer implementation. |
| std::string GetDisplayName() const OVERRIDE { return "ShellDemuxer"; } |
| void Initialize(DemuxerHost* host, const PipelineStatusCB& status_cb, |
| bool enable_text_tracks) OVERRIDE; |
| void AbortPendingReads() OVERRIDE {} |
| void StartWaitingForSeek(base::TimeDelta seek_time) OVERRIDE {} |
| void CancelPendingSeek(base::TimeDelta seek_time) OVERRIDE {} |
| void Stop() OVERRIDE; |
| void Seek(base::TimeDelta time, const PipelineStatusCB& cb) OVERRIDE; |
| DemuxerStream* GetStream(DemuxerStream::Type type) OVERRIDE; |
| base::TimeDelta GetStartTime() const OVERRIDE; |
| base::Time GetTimelineOffset() const OVERRIDE { return base::Time(); } |
| int64_t GetMemoryUsage() const OVERRIDE { |
| NOTREACHED(); |
| return 0; |
| } |
| void OnEnabledAudioTracksChanged(const std::vector<MediaTrack::Id>& track_ids, |
| base::TimeDelta currTime) OVERRIDE { |
| NOTREACHED(); |
| } |
| void OnSelectedVideoTrackChanged(const std::vector<MediaTrack::Id>& track_ids, |
| base::TimeDelta currTime) OVERRIDE { |
| NOTREACHED(); |
| } |
| |
| // TODO: Consider move the following functions to private section. |
| |
| // Issues a task to the demuxer to identify the next buffer of provided type |
| // in the stream, allocate memory to contain that buffer, download the bytes |
| // in to it, and enqueue the data in the appropriate demuxer stream. |
| void Request(DemuxerStream::Type type); |
| |
| // The DemuxerStream objects ask their parent ShellDemuxer stream class |
| // for these configuration data rather than duplicating in the child classes |
| const AudioDecoderConfig& AudioConfig(); |
| const VideoDecoderConfig& VideoConfig(); |
| |
| // Provide access to ShellDemuxerStream. |
| bool MessageLoopBelongsToCurrentThread() const; |
| |
| private: |
| void ParseConfigDone(const PipelineStatusCB& status_cb, |
| PipelineStatus status); |
| void DataSourceStopped(const base::Closure& callback); |
| |
| // methods that perform blocking I/O, and are therefore run on the |
| // blocking_thread_ |
| // download enough of the stream to parse the configuration. returns |
| // false on error. |
| PipelineStatus ParseConfigBlocking(const PipelineStatusCB& status_cb); |
| void AllocateBuffer(); |
| void Download(scoped_refptr<DecoderBuffer> buffer); |
| void IssueNextRequest(); |
| void SeekTask(base::TimeDelta time, const PipelineStatusCB& cb); |
| |
| scoped_refptr<base::MessageLoopProxy> message_loop_; |
| DemuxerHost* host_; |
| |
| // Thread on which all blocking operations are executed. |
| base::Thread blocking_thread_; |
| DataSource* data_source_; |
| scoped_refptr<MediaLog> media_log_; |
| scoped_refptr<ShellDataSourceReader> reader_; |
| |
| bool stopped_; |
| bool flushing_; |
| |
| scoped_ptr<ShellDemuxerStream> audio_demuxer_stream_; |
| scoped_ptr<ShellDemuxerStream> video_demuxer_stream_; |
| scoped_refptr<ShellParser> parser_; |
| |
| scoped_refptr<ShellAU> requested_au_; |
| bool audio_reached_eos_; |
| bool video_reached_eos_; |
| }; |
| |
| } // namespace media |
| |
| #endif // COBALT_MEDIA_FILTERS_SHELL_DEMUXER_H_ |