| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef MEDIA_BASE_DEMUXER_H_ |
| #define MEDIA_BASE_DEMUXER_H_ |
| |
| #include <vector> |
| |
| #include "base/time/time.h" |
| #include "media/base/data_source.h" |
| #include "media/base/demuxer_stream.h" |
| #include "media/base/media_export.h" |
| #include "media/base/pipeline_status.h" |
| |
| namespace media { |
| |
| class TextTrackConfig; |
| |
| class MEDIA_EXPORT DemuxerHost : public DataSourceHost { |
| public: |
| // Sets the duration of the media in microseconds. |
| // Duration may be kInfiniteDuration() if the duration is not known. |
| virtual void SetDuration(base::TimeDelta duration) = 0; |
| |
| // Stops execution of the pipeline due to a fatal error. Do not call this |
| // method with PIPELINE_OK. |
| virtual void OnDemuxerError(PipelineStatus error) = 0; |
| |
| // Add |text_stream| to the collection managed by the text renderer. |
| virtual void AddTextStream(DemuxerStream* text_stream, |
| const TextTrackConfig& config) = 0; |
| |
| // Remove |text_stream| from the presentation. |
| virtual void RemoveTextStream(DemuxerStream* text_stream) = 0; |
| |
| protected: |
| virtual ~DemuxerHost(); |
| }; |
| |
| class MEDIA_EXPORT Demuxer { |
| public: |
| // A new potentially encrypted stream has been parsed. |
| // First parameter - The type of initialization data. |
| // Second parameter - The initialization data associated with the stream. |
| typedef base::Callback<void(const std::string& type, |
| const std::vector<uint8>& init_data)> NeedKeyCB; |
| |
| Demuxer(); |
| virtual ~Demuxer(); |
| |
| // Completes initialization of the demuxer. |
| // |
| // The demuxer does not own |host| as it is guaranteed to outlive the |
| // lifetime of the demuxer. Don't delete it! |
| virtual void Initialize(DemuxerHost* host, |
| const PipelineStatusCB& status_cb, |
| bool enable_text_tracks) = 0; |
| |
| // Carry out any actions required to seek to the given time, executing the |
| // callback upon completion. |
| virtual void Seek(base::TimeDelta time, |
| const PipelineStatusCB& status_cb) = 0; |
| |
| // Starts stopping this demuxer, executing the callback upon completion. |
| // |
| // After the callback completes the demuxer may be destroyed. It is illegal to |
| // call any method (including Stop()) after a demuxer has stopped. |
| virtual void Stop(const base::Closure& callback) = 0; |
| |
| // This method is called from the pipeline when the audio renderer |
| // is disabled. Demuxers can ignore the notification if they do not |
| // need to react to this event. |
| // |
| // TODO(acolwell): Change to generic DisableStream(DemuxerStream::Type). |
| // TODO(scherkus): this might not be needed http://crbug.com/234708 |
| virtual void OnAudioRendererDisabled() = 0; |
| |
| // Returns the first stream of the given stream type (which is not allowed |
| // to be DemuxerStream::TEXT), or NULL if that type of stream is not present. |
| virtual DemuxerStream* GetStream(DemuxerStream::Type type) = 0; |
| |
| // Returns the starting time for the media file. |
| virtual base::TimeDelta GetStartTime() const = 0; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(Demuxer); |
| }; |
| |
| } // namespace media |
| |
| #endif // MEDIA_BASE_DEMUXER_H_ |