|  | /* | 
|  | *  Copyright 2018 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 <AVFoundation/AVFoundation.h> | 
|  |  | 
|  | #include "api/video/i420_buffer.h" | 
|  |  | 
|  | void DrawGradientInRGBPixelBuffer(CVPixelBufferRef pixelBuffer); | 
|  |  | 
|  | rtc::scoped_refptr<webrtc::I420Buffer> CreateI420Gradient(int width, | 
|  | int height); | 
|  |  | 
|  | void CopyI420BufferToCVPixelBuffer( | 
|  | rtc::scoped_refptr<webrtc::I420Buffer> i420Buffer, | 
|  | CVPixelBufferRef pixelBuffer); |