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

webrtc/sdk/objc/Framework/Classes/avfoundationvideocapturer.mm

 /*
  *  Copyright 2015 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.
  */
 
 #include "avfoundationvideocapturer.h"
 
 #import <AVFoundation/AVFoundation.h>
 
 #import "RTCAVFoundationVideoCapturerInternal.h"
 #import "RTCDispatcher+Private.h"
 #import "WebRTC/RTCLogging.h"
 
 #include "avfoundationformatmapper.h"
 
 #include "webrtc/api/video/video_rotation.h"
+#include "webrtc/api/video/video_content_type.h"
 #include "webrtc/base/bind.h"
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/thread.h"
 #include "webrtc/common_video/include/corevideo_frame_buffer.h"
 
 namespace webrtc {
 
 enum AVFoundationVideoCapturerMessageType : uint32_t {
   kMessageTypeFrame,
@@ skipping 130 matching lines @@
   if (apply_rotation() && rotation != kVideoRotation_0) {
     buffer = I420Buffer::Rotate(buffer->NativeToI420Buffer(),
                                 rotation);
     if (rotation == kVideoRotation_90 || rotation == kVideoRotation_270) {
       std::swap(captured_width, captured_height);
     }
 
     rotation = kVideoRotation_0;
   }
 
-  OnFrame(webrtc::VideoFrame(buffer, rotation, translated_camera_time_us),
+  OnFrame(webrtc::VideoFrame(buffer, rotation, kVideoContent_Default,
+                             translated_camera_time_us),
           captured_width, captured_height);
 }
 
 }  // namespace webrtc