iOS: Add new RTCVideoSource interface

webrtc/sdk/objc/Framework/Classes/RTCVideoSource.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.
  */
 
 #import "RTCVideoSource+Private.h"
 
 #include "webrtc/base/checks.h"
+#include "webrtc/sdk/objc/Framework/Classes/objcvideotracksource.h"
 
+// TODO(magjed): Refactor this class and target ObjcVideoTrackSource only once
+// RTCAVFoundationVideoSource is gone. See http://crbug/webrtc/7177 for more
+// info.
 @implementation RTCVideoSource {
   rtc::scoped_refptr<webrtc::VideoTrackSourceInterface> _nativeVideoSource;
 }
 
 - (instancetype)initWithNativeVideoSource:
     (rtc::scoped_refptr<webrtc::VideoTrackSourceInterface>)nativeVideoSource {
   RTC_DCHECK(nativeVideoSource);
   if (self = [super initWithNativeMediaSource:nativeVideoSource
                                          type:RTCMediaSourceTypeVideo]) {
     _nativeVideoSource = nativeVideoSource;
   }
   return self;
 }
 
 - (instancetype)initWithNativeMediaSource:
     (rtc::scoped_refptr<webrtc::MediaSourceInterface>)nativeMediaSource
                                      type:(RTCMediaSourceType)type {
   RTC_NOTREACHED();
   return nil;
 }
 
 - (NSString *)description {
   NSString *stateString = [[self class] stringForState:self.state];
   return [NSString stringWithFormat:@"RTCVideoSource( %p ): %@", self, stateString];
 }
 
+- (void)capturer:(RTCVideoCapturer *)capturer didCaptureVideoFrame:(RTCVideoFrame *)frame {
+  static_cast<webrtc::ObjcVideoTrackSource *>(_nativeVideoSource.get())->OnCapturedFrame(frame);
+}
+
+- (void)adaptOutputFormatToWidth:(int)width height:(int)height fps:(int)fps {
+  static_cast<webrtc::ObjcVideoTrackSource *>(_nativeVideoSource.get())
+      ->OnOutputFormatRequest(width, height, fps);
+}
+
 #pragma mark - Private
 
 - (rtc::scoped_refptr<webrtc::VideoTrackSourceInterface>)nativeVideoSource {
   return _nativeVideoSource;
 }
 
 @end