[Media] Record time it takes to start rendering audio and video

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 "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 96 matching lines @@
 
   // RendererClient implementation.
   void OnError(PipelineStatus error) final;
   void OnEnded() final;
   void OnStatisticsUpdate(const PipelineStatistics& stats) final;
   void OnBufferingStateChange(BufferingState state) final;
   void OnWaitingForDecryptionKey() final;
   void OnVideoNaturalSizeChange(const gfx::Size& size) final;
   void OnVideoOpacityChange(bool opaque) final;
   void OnDurationChange(base::TimeDelta duration) final;
+  void OnFirstFrameRender() final;
 
   // TextRenderer tasks and notifications.
   void OnTextRendererEnded();
   void AddTextStreamTask(DemuxerStream* text_stream,
                          const TextTrackConfig& config);
   void RemoveTextStreamTask(DemuxerStream* text_stream);
 
   // Common handlers for notifications from renderers and demuxer.
   void OnPipelineError(PipelineStatus error);
   void OnCdmAttached(const CdmAttachedCB& cdm_attached_cb,
@@ skipping 545 matching lines @@
   main_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&PipelineImpl::OnVideoOpacityChange, weak_pipeline_, opaque));
 }
 
 void PipelineImpl::RendererWrapper::OnDurationChange(base::TimeDelta duration) {
   DCHECK(media_task_runner_->BelongsToCurrentThread());
   SetDuration(duration);
 }
 
+void PipelineImpl::RendererWrapper::OnFirstFrameRender() {
+  DCHECK(media_task_runner_->BelongsToCurrentThread());
+  NOTREACHED();
+}
+
 void PipelineImpl::RendererWrapper::OnTextRendererEnded() {
   DCHECK(media_task_runner_->BelongsToCurrentThread());
   media_log_->AddEvent(media_log_->CreateEvent(MediaLogEvent::TEXT_ENDED));
 
   if (state_ != kPlaying)
     return;
 
   DCHECK(!text_renderer_ended_);
   text_renderer_ended_ = true;
   CheckPlaybackEnded();
@@ skipping 616 matching lines @@
 void PipelineImpl::OnSuspendDone() {
   DVLOG(3) << __func__;
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(IsRunning());
 
   DCHECK(!suspend_cb_.is_null());
   base::ResetAndReturn(&suspend_cb_).Run(PIPELINE_OK);
 }
 
 }  // namespace media