Decouple capture timestamp and reference time

content/browser/renderer_host/media/video_capture_controller_event_handler.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_EVENT_HANDLER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_EVENT_HANDLER_H_
 
 #include <memory>
 
 #include "base/memory/shared_memory.h"
@@ skipping 31 matching lines @@
       int buffer_id) = 0;
 
   // A previously created buffer has been freed and will no longer be used.
   virtual void OnBufferDestroyed(VideoCaptureControllerID id,
                                  int buffer_id) = 0;
 
   // A buffer has been filled with a captured VideoFrame.
   virtual void OnBufferReady(VideoCaptureControllerID id,
                              int buffer_id,
                              const scoped_refptr<media::VideoFrame>& frame,
-                             const base::TimeTicks& timestamp) = 0;
+                             base::TimeTicks reference_time) = 0;

[miu, 2016/06/07 20:03:47]

ditto: You can let frame->metadata() carry the REFERENCE_TIME value instead of
having a 3rd argument here. (Explained in comment below for
video_capture_host.cc.)

[qiangchen, 2016/06/08 18:04:30]

Done.

 
   // The capture session has ended and no more frames will be sent.
   virtual void OnEnded(VideoCaptureControllerID id) = 0;
 
  protected:
   virtual ~VideoCaptureControllerEventHandler() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_EVENT_HANDLER_H_