Decouple capture timestamp and reference time

media/capture/video/file_video_capture_device.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/capture/video/file_video_capture_device.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 348 matching lines @@
   DCHECK_EQ(capture_thread_.message_loop(), base::MessageLoop::current());
   if (!client_)
     return;
 
   // Give the captured frame to the client.
   int frame_size = 0;
   const uint8_t* frame_ptr = file_parser_->GetNextFrame(&frame_size);
   DCHECK(frame_size);
   CHECK(frame_ptr);
   const base::TimeTicks current_time = base::TimeTicks::Now();
+  if (first_ref_time_.is_null())
+    first_ref_time_ = current_time;
   client_->OnIncomingCapturedData(frame_ptr, frame_size, capture_format_, 0,
-                                  current_time);
+                                  current_time, current_time - first_ref_time_);
   // Reschedule next CaptureTask.
   const base::TimeDelta frame_interval =
       base::TimeDelta::FromMicroseconds(1E6 / capture_format_.frame_rate);
   if (next_frame_time_.is_null()) {
     next_frame_time_ = current_time + frame_interval;
   } else {
     next_frame_time_ += frame_interval;
     // Don't accumulate any debt if we are lagging behind - just post next frame
     // immediately and continue as normal.
     if (next_frame_time_ < current_time)
       next_frame_time_ = current_time;
   }
   base::MessageLoop::current()->PostDelayedTask(
       FROM_HERE, base::Bind(&FileVideoCaptureDevice::OnCaptureTask,
                             base::Unretained(this)),
       next_frame_time_ - current_time);
 }
 
 }  // namespace media