Add content type information to encoded images and corresponding rtp extension header

webrtc/media/base/adaptedvideotracksource.cc

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 33 matching lines @@
      pending rotation despite some sink with wants.rotation_applied ==
      true was just added. The VideoBroadcaster enforces
      synchronization for us in this case, by not passing the frame on
      to sinks which don't want it. */
   if (apply_rotation() &&
       frame.rotation() != webrtc::kVideoRotation_0 &&
       !buffer->native_handle()) {
     /* Apply pending rotation. */
     broadcaster_.OnFrame(webrtc::VideoFrame(
         webrtc::I420Buffer::Rotate(*buffer, frame.rotation()),
-        webrtc::kVideoRotation_0, frame.timestamp_us()));
+        webrtc::kVideoRotation_0, frame.content_type(), frame.timestamp_us()));
   } else {
     broadcaster_.OnFrame(frame);
   }
 }
 
 void AdaptedVideoTrackSource::AddOrUpdateSink(
     rtc::VideoSinkInterface<webrtc::VideoFrame>* sink,
     const rtc::VideoSinkWants& wants) {
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
 
@@ skipping 44 matching lines @@
     // VideoAdapter dropped the frame.
     return false;
   }
 
   *crop_x = (width - *crop_width) / 2;
   *crop_y = (height - *crop_height) / 2;
   return true;
 }
 
 }  // namespace rtc