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

media/capture/video/win/sink_input_pin_win.cc

Index: media/capture/video/win/sink_input_pin_win.cc
diff --git a/media/capture/video/win/sink_input_pin_win.cc b/media/capture/video/win/sink_input_pin_win.cc
index 9c515a3422e722790a7cfc051d8ff9150e91bdaf..7bc8099ee42a1c3946f6b41f65c2ea89b219cab8 100644
--- a/media/capture/video/win/sink_input_pin_win.cc
+++ b/media/capture/video/win/sink_input_pin_win.cc
@@ -182,7 +182,11 @@ HRESULT SinkInputPin::Receive(IMediaSample* sample) {
   if (FAILED(sample->GetPointer(&buffer)))
     return S_FALSE;
 
-  observer_->FrameReceived(buffer, length);
+  REFERENCE_TIME start_time, end_time;
+
+  sample->GetTime(&start_time, &end_time);
+

[mcasas, 2015/09/09 23:33:26]

I deeply distrust all this code. Would you mind adding
a DCHECK to certify that |start_time| <= |end_time| 
and |start_time| is non negative?

[qiangchen, 2015/09/10 18:03:01]

Done.

Added a fallback to old code path if the driver does not provide a timestamp.

+  observer_->FrameReceived(buffer, length, start_time);
   return S_OK;
 }