Implement disabling and enabling media tracks

media/base/pipeline_impl.h

 // Copyright (c) 2016 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_PIPELINE_IMPL_H_
 #define MEDIA_BASE_PIPELINE_IMPL_H_
 
 #include <memory>
 
 #include "base/gtest_prod_util.h"
@@ skipping 76 matching lines @@
   ~PipelineImpl() override;
 
   void SetErrorForTesting(PipelineStatus status);
   bool HasWeakPtrsForTesting() const;
 
   // Pipeline implementation.
   void Start(Demuxer* demuxer,
              std::unique_ptr<Renderer> renderer,
              Client* client,
              const PipelineStatusCB& seek_cb) override;
+  void RestartStreamPlayback(DemuxerStream* stream,
+                             base::TimeDelta time) override;
   void Stop() override;
   void Seek(base::TimeDelta time, const PipelineStatusCB& seek_cb) override;
   bool IsRunning() const override;
   double GetPlaybackRate() const override;
   void SetPlaybackRate(double playback_rate) override;
   void Suspend(const PipelineStatusCB& suspend_cb) override;
   void Resume(std::unique_ptr<Renderer> renderer,
               base::TimeDelta timestamp,
               const PipelineStatusCB& seek_cb) override;
   float GetVolume() const override;
@@ skipping 50 matching lines @@
   void OnBufferingStateChange(BufferingState state) override;
   void OnWaitingForDecryptionKey() override;
   void OnVideoNaturalSizeChange(const gfx::Size& size) override;
   void OnVideoOpacityChange(bool opaque) override;
 
   // The following "task" methods correspond to the public methods, but these
   // methods are run as the result of posting a task to the Pipeline's
   // task runner.
   void StartTask();
 
+  void RestartStreamPlaybackTask(DemuxerStream* stream, base::TimeDelta time);
+
   // Suspends the pipeline, discarding the current renderer.
   void SuspendTask(const PipelineStatusCB& suspend_cb);
 
   // Resumes the pipeline with a new renderer, and initializes it with a seek.
   void ResumeTask(std::unique_ptr<Renderer> renderer,
                   base::TimeDelta timestamp,
                   const PipelineStatusCB& seek_sb);
 
   // Stops and destroys all filters, placing the pipeline in the kStopped state.
   void StopTask(const base::Closure& stop_cb);
@@ skipping 160 matching lines @@
   // Declared last so that weak pointers will be invalidated before all other
   // member variables.
   base::WeakPtrFactory<PipelineImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PipelineImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_PIPELINE_IMPL_H_