Implement disabling and enabling media tracks

media/filters/chunk_demuxer.h

 // 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_FILTERS_CHUNK_DEMUXER_H_
 #define MEDIA_FILTERS_CHUNK_DEMUXER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 89 matching lines @@
   void UnmarkEndOfStream();
 
   // DemuxerStream methods.
   void Read(const ReadCB& read_cb) override;
   Type type() const override;
   Liveness liveness() const override;
   AudioDecoderConfig audio_decoder_config() override;
   VideoDecoderConfig video_decoder_config() override;
   bool SupportsConfigChanges() override;
   VideoRotation video_rotation() override;
+  bool enabled() const override;
+  void set_enabled(bool enabled, base::TimeDelta timestamp) override;
+  void SetStreamRestartedCB(const StreamRestartedCB& cb) override;
 
   // Returns the text track configuration.  It is an error to call this method
   // if type() != TEXT.
   TextTrackConfig text_track_config();
 
   // Sets the memory limit, in bytes, on the SourceBufferStream.
   void SetStreamMemoryLimit(size_t memory_limit);
 
   bool supports_partial_append_window_trimming() const {
     return partial_append_window_trimming_enabled_;
@@ skipping 23 matching lines @@
 
   std::unique_ptr<SourceBufferStream> stream_;
 
   const MediaTrack::Id media_track_id_;
 
   mutable base::Lock lock_;
   State state_;
   ReadCB read_cb_;
   bool splice_frames_enabled_;
   bool partial_append_window_trimming_enabled_;
+  bool is_enabled_;
+  StreamRestartedCB stream_restarted_cb_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ChunkDemuxerStream);
 };
 
 // Demuxer implementation that allows chunks of media data to be passed
 // from JavaScript to the media stack.
 class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
  public:
   enum Status {
     kOk,              // ID added w/o error.
@@ skipping 52 matching lines @@
   void SetTracksWatcher(const std::string& id,
                         const MediaTracksUpdatedCB& tracks_updated_cb);
 
   // Removed an ID & associated resources that were previously added with
   // AddId().
   void RemoveId(const std::string& id);
 
   // Gets the currently buffered ranges for the specified ID.
   Ranges<base::TimeDelta> GetBufferedRanges(const std::string& id) const;
 
+  void OnEnabledAudioTracksChanged(const std::vector<MediaTrack::Id>& track_ids,
+                                   base::TimeDelta currTime) override;
+  // |track_ids| is either empty or contains a single video track id.
+  void OnSelectedVideoTrackChanged(const std::vector<MediaTrack::Id>& track_ids,
+                                   base::TimeDelta currTime) override;
+
   // Appends media data to the source buffer associated with |id|, applying
   // and possibly updating |*timestamp_offset| during coded frame processing.
   // |append_window_start| and |append_window_end| correspond to the MSE spec's
   // similarly named source buffer attributes that are used in coded frame
   // processing. Returns true on success, false if the caller needs to run the
   // append error algorithm with decode error parameter set to true.
   bool AppendData(const std::string& id,
                   const uint8_t* data,
                   size_t length,
                   base::TimeDelta append_window_start,
@@ skipping 183 matching lines @@
   std::string source_id_video_;
 
   // Indicates that splice frame generation is enabled.
   const bool splice_frames_enabled_;
 
   // Accumulate, by type, detected track counts across the SourceBuffers.
   int detected_audio_track_count_;
   int detected_video_track_count_;
   int detected_text_track_count_;
 
+  std::map<MediaTrack::Id, const DemuxerStream*> track_id_to_demux_stream_map_;
+
   DISALLOW_COPY_AND_ASSIGN(ChunkDemuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_CHUNK_DEMUXER_H_