Implement disabling and enabling media tracks

media/base/pipeline_impl.cc

 // 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.
 
 #include "media/base/pipeline_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 67 matching lines @@
 
   demuxer_ = demuxer;
   renderer_ = std::move(renderer);
   client_weak_factory_.reset(new base::WeakPtrFactory<Client>(client));
   weak_client_ = client_weak_factory_->GetWeakPtr();
   seek_cb_ = media::BindToCurrentLoop(seek_cb);
   media_task_runner_->PostTask(
       FROM_HERE, base::Bind(&PipelineImpl::StartTask, weak_this_));
 }
 
+void PipelineImpl::RestartStreamPlayback(DemuxerStream* stream,
+                                         base::TimeDelta time) {
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
+  DVLOG(2) << __FUNCTION__;
+  media_task_runner_->PostTask(
+      FROM_HERE, base::Bind(&PipelineImpl::RestartStreamPlaybackTask,
+                            weak_this_, stream, time));
+}
+
+void PipelineImpl::RestartStreamPlaybackTask(DemuxerStream* stream,
+                                             base::TimeDelta time) {
+  DCHECK(media_task_runner_->BelongsToCurrentThread());
+  renderer_->RestartStreamPlayback(stream, time);
+}
+
 void PipelineImpl::Stop() {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   DVLOG(2) << __FUNCTION__;
 
   if (media_task_runner_ != main_task_runner_) {
     // This path is executed by production code where the two task runners -
     // main and media - live on different threads.
     // TODO(alokp): It may be possible to not have to wait for StopTask by
     // moving the members accessed on media thread into a class/struct and
     // DeleteSoon the instance on the media thread.
@@ skipping 852 matching lines @@
   if (demuxer_->GetStream(DemuxerStream::AUDIO)) {
     metadata.has_audio = true;
   }
 
   main_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&Pipeline::Client::OnMetadata, weak_client_, metadata));
 }
 
 }  // namespace media