Mac Video Capture: Sending the timestamps provided by the driver to the capture pipeline

media/capture/video/mac/video_capture_device_mac.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.
 
 // MacOSX implementation of generic VideoCaptureDevice, using either QTKit or
 // AVFoundation as native capture API. QTKit is available in all OSX versions,
 // although namely deprecated in 10.9, and AVFoundation is available in versions
 // 10.7 (Lion) and later.
 
 #ifndef MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_MAC_H_
@@ skipping 52 matching lines @@
                         scoped_ptr<VideoCaptureDevice::Client> client) override;
   void StopAndDeAllocate() override;
 
   bool Init(VideoCaptureDevice::Name::CaptureApiType capture_api_type);
 
   // Called to deliver captured video frames.
   void ReceiveFrame(const uint8* video_frame,
                     int video_frame_length,
                     const VideoCaptureFormat& frame_format,
                     int aspect_numerator,
-                    int aspect_denominator);
+                    int aspect_denominator,
+                    base::TimeDelta timestamp);
 
   // Forwarder to VideoCaptureDevice::Client::OnError().
   void ReceiveError(const std::string& reason);
 
   // Forwarder to VideoCaptureDevice::Client::OnLog().
   void LogMessage(const std::string& message);
 
  private:
   void SetErrorState(const std::string& reason);
   bool UpdateCaptureResolution();
@@ skipping 11 matching lines @@
   // not need this process so |final_resolution_selected_| is false then.
   bool final_resolution_selected_;
   bool tried_to_square_pixels_;
 
   // Only read and write state_ from inside this loop.
   const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   InternalState state_;
 
   id<PlatformVideoCapturingMac> capture_device_;
 
+  base::TimeDelta first_timestamp_;
+  base::TimeTicks first_aligned_timestamp_;
+
   // Used with Bind and PostTask to ensure that methods aren't called after the
   // VideoCaptureDeviceMac is destroyed.
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<VideoCaptureDeviceMac> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceMac);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_MAC_H_