Make the entry point for VideoFrames to webrtc const ref I420VideoFrame.

This removes the none const pointer entry and SwapFrame.

Since frames delivered using VideoSendStream no longer use the external capture module, VideoSendStream will not get an incoming framerate callback. VideoSendStream now uses a rtc::RateTracker.
Also, the video engine must ensure that time stamps are always increasing.

With this, time stamps (ntp, render_time and rtp timestamps ) are checked and set in ViECapturer::OnIncomingCapturedFrame

BUG=1128
R=magjed@webrtc.org, mflodman@webrtc.org, pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/46429004

Cr-Commit-Position: refs/heads/master@{#8633}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8633 4adac7df-926f-26a2-2b94-8c16560cd09d

1 files changed, 6 insertions, 2 deletions

diff --git a/webrtc/video_frame.h b/webrtc/video_frame.h
index f207c1ace6..385907278f 100644
--- a/webrtc/video_frame.h
+++ b/webrtc/video_frame.h
@@ -73,11 +73,15 @@ class I420VideoFrame {
                   int stride_v,
                   VideoRotation rotation);
 
-  // Copy frame: If required size is bigger than allocated one, new buffers of
-  // adequate size will be allocated.
+  // Deep copy frame: If required size is bigger than allocated one, new
+  // buffers of adequate size will be allocated.
   // Return value: 0 on success, -1 on error.
   int CopyFrame(const I420VideoFrame& videoFrame);
 
+  // Creates a shallow copy of |videoFrame|, i.e, the this object will retain a
+  // reference to the video buffer also retained by |videoFrame|.
+  void ShallowCopy(const I420VideoFrame& videoFrame);
+
   // Make a copy of |this|. The caller owns the returned frame.
   // Return value: a new frame on success, NULL on error.
   I420VideoFrame* CloneFrame() const;