[Feature might be dropped] VideoPlaybackQuality.totalFrameDelay

media/filters/video_renderer_impl.cc

 // 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.
 
 #include "media/filters/video_renderer_impl.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/debug/trace_event.h"
@@ skipping 24 matching lines @@
       state_(kUninitialized),
       thread_(),
       pending_read_(false),
       drop_frames_(drop_frames),
       buffering_state_(BUFFERING_HAVE_NOTHING),
       paint_cb_(paint_cb),
       last_timestamp_(kNoTimestamp()),
       last_painted_timestamp_(kNoTimestamp()),
       frames_decoded_(0),
       frames_dropped_(0),
+      frames_delay_time_(0),
       is_shutting_down_(false),
       weak_factory_(this) {
   DCHECK(!paint_cb_.is_null());
 }
 
 VideoRendererImpl::~VideoRendererImpl() {
   DCHECK(task_runner_->BelongsToCurrentThread());
 
   {
     base::AutoLock auto_lock(lock_);
@@ skipping 208 matching lines @@
 
   scoped_refptr<VideoFrame> next_frame = ready_frames_.front();
   ready_frames_.pop_front();
   frames_decoded_++;
 
   last_timestamp_ = next_frame->timestamp();
   last_painted_timestamp_ = next_frame->timestamp();
 
   paint_cb_.Run(next_frame);
 
+  base::TimeDelta now = get_time_cb_.Run();
+  frames_delay_time_ += (now - last_painted_timestamp_).InSecondsF();
+
   task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&VideoRendererImpl::AttemptRead, weak_factory_.GetWeakPtr()));
 }
 
 void VideoRendererImpl::DropNextReadyFrame_Locked() {
   TRACE_EVENT0("media", "VideoRendererImpl:frameDropped");
 
   lock_.AssertAcquired();
 
@@ skipping 176 matching lines @@
 void VideoRendererImpl::UpdateStatsAndWait_Locked(
     base::TimeDelta wait_duration) {
   lock_.AssertAcquired();
   DCHECK_GE(frames_decoded_, 0);
   DCHECK_LE(frames_dropped_, frames_decoded_);
 
   if (frames_decoded_) {
     PipelineStatistics statistics;
     statistics.video_frames_decoded = frames_decoded_;
     statistics.video_frames_dropped = frames_dropped_;
+    statistics.total_frame_delay = frames_delay_time_;
     task_runner_->PostTask(FROM_HERE, base::Bind(statistics_cb_, statistics));
 
     frames_decoded_ = 0;
     frames_dropped_ = 0;
+    frames_delay_time_ = 0;
   }
 
   frame_available_.TimedWait(wait_duration);
 }
 
 }  // namespace media