[chromecast] Track MediaPipelineBackend used by CastRenderer.

chromecast/browser/media/cast_renderer.cc

 // Copyright 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.
 
 #include "chromecast/browser/media/cast_renderer.h"
 
 #include "base/bind.h"
 #include "base/single_thread_task_runner.h"
 #include "chromecast/base/task_runner_impl.h"
 #include "chromecast/browser/media/video_resolution_policy.h"
@@ skipping 17 matching lines @@
 namespace {
 // Maximum difference between audio frame PTS and video frame PTS
 // for frames read from the DemuxerStream.
 const base::TimeDelta kMaxDeltaFetcher(base::TimeDelta::FromMilliseconds(2000));
 }  // namespace
 
 CastRenderer::CastRenderer(
     const CreateMediaPipelineBackendCB& create_backend_cb,
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     const std::string& audio_device_id,
-    VideoResolutionPolicy* video_resolution_policy)
+    VideoResolutionPolicy* video_resolution_policy,
+    MediaResourceTracker* media_resource_tracker)
     : create_backend_cb_(create_backend_cb),
       task_runner_(task_runner),
       audio_device_id_(audio_device_id),
       video_resolution_policy_(video_resolution_policy),
+      media_resource_tracker_(media_resource_tracker),
       client_(nullptr),
       cast_cdm_context_(nullptr),
       media_task_runner_factory_(
           new BalancedMediaTaskRunnerFactory(kMaxDeltaFetcher)),
       weak_factory_(this) {
   CMALOG(kLogControl) << __FUNCTION__ << ": " << this;
 
   if (video_resolution_policy_)
     video_resolution_policy_->AddObserver(this);
 }
 
 CastRenderer::~CastRenderer() {
   CMALOG(kLogControl) << __FUNCTION__ << ": " << this;
   DCHECK(task_runner_->BelongsToCurrentThread());
 
   if (video_resolution_policy_)
     video_resolution_policy_->RemoveObserver(this);
 }
 
 void CastRenderer::Initialize(
     ::media::DemuxerStreamProvider* demuxer_stream_provider,
     ::media::RendererClient* client,
     const ::media::PipelineStatusCB& init_cb) {
   CMALOG(kLogControl) << __FUNCTION__ << ": " << this;
   DCHECK(task_runner_->BelongsToCurrentThread());
 
   // Create pipeline backend.
+  media_resource_usage_.reset(
+      new MediaResourceTracker::ScopedUsage(media_resource_tracker_));
   backend_task_runner_.reset(new TaskRunnerImpl());
   // TODO(erickung): crbug.com/443956. Need to provide right LoadType.
   LoadType load_type = kLoadTypeMediaSource;
   MediaPipelineDeviceParams::MediaSyncType sync_type =
       (load_type == kLoadTypeMediaStream)
           ? MediaPipelineDeviceParams::kModeIgnorePts
           : MediaPipelineDeviceParams::kModeSyncPts;
   MediaPipelineDeviceParams params(sync_type, backend_task_runner_.get());
   std::unique_ptr<MediaPipelineBackend> backend =
       create_backend_cb_.Run(params, audio_device_id_);
@@ skipping 184 matching lines @@
 }
 
 void CastRenderer::OnVideoOpacityChange(bool opaque) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK(opaque);
   client_->OnVideoOpacityChange(opaque);
 }
 
 }  // namespace media
 }  // namespace chromecast