Implement disabling and enabling media tracks

media/blink/webmediaplayer_impl.h

 // Copyright 2013 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_BLINK_WEBMEDIAPLAYER_IMPL_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 49 matching lines @@
 
 namespace gpu {
 namespace gles2 {
 class GLES2Interface;
 }
 }
 
 namespace media {
 class AudioHardwareConfig;
 class ChunkDemuxer;
+class DemuxerStream;
 class GpuVideoAcceleratorFactories;
 class MediaLog;
 class UrlIndex;
 class VideoFrameCompositor;
 class WebAudioSourceProviderImpl;
 class WebMediaPlayerDelegate;
 class WebTextTrackImpl;
 
 // The canonical implementation of blink::WebMediaPlayer that's backed by
 // Pipeline. Handles normal resource loading, Media Source, and
@@ skipping 194 matching lines @@
   void StartPipeline();
 
   // Helpers that set the network/ready state and notifies the client if
   // they've changed.
   void SetNetworkState(blink::WebMediaPlayer::NetworkState state);
   void SetReadyState(blink::WebMediaPlayer::ReadyState state);
 
   // Gets the duration value reported by the pipeline.
   double GetPipelineDuration() const;
 
+  // Restarts playback of the given demuxer |stream| at the position |time|
+  // after it has been re-enabled.
+  void RestartStreamPlayback(DemuxerStream* stream, base::TimeDelta time);
+
   // Called by VideoRendererImpl on its internal thread with the new frame to be
   // painted.
   void FrameReady(const scoped_refptr<VideoFrame>& frame);
 
   // Returns the current video frame from |compositor_|. Blocks until the
   // compositor can return the frame.
   scoped_refptr<VideoFrame> GetCurrentFrameFromCompositor();
 
   // Called when the demuxer encounters encrypted streams.
   void OnEncryptedMediaInitData(EmeInitDataType init_data_type,
@@ skipping 213 matching lines @@
   // state will be set to YES or NO respectively if a frame is available.
   enum class CanSuspendState { UNKNOWN, YES, NO };
   CanSuspendState can_suspend_state_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_