Add RTCVideoFrame init function from CVPixelBufferRef

webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoFrame.h

Index: webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoFrame.h
diff --git a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoFrame.h b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoFrame.h
index cbd8cc74e81775fbe340a34a7dcd5f7d1d9bc385..ddf8a6b6281666934bbf416338fee0c7fdcb4a1c 100644
--- a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoFrame.h
+++ b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoFrame.h
@@ -50,6 +50,27 @@ RTC_EXPORT
 @property(nonatomic, readonly) CVPixelBufferRef nativeHandle;
 
 - (instancetype)init NS_UNAVAILABLE;
+- (instancetype)new NS_UNAVAILABLE;

[tkchin_webrtc, 2017/02/22 00:01:18]

Did you mean + ?
Personally I don't think we need to disallow this everywhere. Intent should be
clear enough from disallowing init. Otherwise we always need to do this in every
file that has nontrivial ctor in addition to init.

+
+/** Initialize an RTCVideoFrame from a pixel buffer, rotation, and timestamp.
+ */
+- (instancetype)initWithPixelBuffer:(CVPixelBufferRef)pixelBuffer
+                           rotation:(RTCVideoRotation)rotation
+                        timeStampNs:(int64_t)timeStampNs;
+
+/** Initialize an RTCVideoFrame from a pixel buffer combined with cropping and
+ *  scaling. Cropping will be applied first on the pixel buffer, followed by
+ *  scaling to the final resolution of scaledWidth x scaledHeight.
+ */
+- (instancetype)initWithPixelBuffer:(CVPixelBufferRef)pixelBuffer
+                        scaledWidth:(int)scaledWidth
+                       scaledHeight:(int)scaledHeight
+                          cropWidth:(int)cropWidth
+                         cropHeight:(int)cropHeight
+                              cropX:(int)cropX
+                              cropY:(int)cropY
+                           rotation:(RTCVideoRotation)rotation
+                        timeStampNs:(int64_t)timeStampNs;
 
 /** Return a frame that is guaranteed to be I420, i.e. it is possible to access
  *  the YUV data on it.