Support more formats in RTCVideoFrame

Implement Obj-C version of webrtc::VideoFrameBuffer and use that in
RTCVideoFrame.

Bug: webrtc:7785
Change-Id: I49f42bcf451dd6769b3a79a65fe7b400dce22677
Reviewed-on: https://chromium-review.googlesource.com/536773
Commit-Queue: Anders Carlsson <andersc@webrtc.org>
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#18691}

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

@@ -0,0 +1,99 @@
+/*
+ *  Copyright 2017 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>
+#import <WebRTC/RTCMacros.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@protocol RTCI420Buffer;
+
+// RTCVideoFrameBuffer is an ObjectiveC version of webrtc::VideoFrameBuffer.
+RTC_EXPORT
+@protocol RTCVideoFrameBuffer <NSObject>
+
+@property(nonatomic, readonly) int width;
+@property(nonatomic, readonly) int height;
+
+- (id<RTCI420Buffer>)toI420;
+
+@end
+
+/** Protocol for RTCVideoFrameBuffers containing YUV planar data. */
+@protocol RTCYUVPlanarBuffer <RTCVideoFrameBuffer>
+
+@property(nonatomic, readonly) int chromaWidth;
+@property(nonatomic, readonly) int chromaHeight;
+@property(nonatomic, readonly) const uint8_t *dataY;
+@property(nonatomic, readonly) const uint8_t *dataU;
+@property(nonatomic, readonly) const uint8_t *dataV;
+@property(nonatomic, readonly) int strideY;
+@property(nonatomic, readonly) int strideU;
+@property(nonatomic, readonly) int strideV;
+
+- (instancetype)initWithWidth:(int)width height:(int)height;
+- (instancetype)initWithWidth:(int)width
+                       height:(int)height
+                      strideY:(int)strideY
+                      strideU:(int)strideU
+                      strideV:(int)strideV;
+
+@end
+
+/** Extension of the YUV planar data buffer with mutable data access */
+@protocol RTCMutableYUVPlanarBuffer <RTCYUVPlanarBuffer>
+
+@property(nonatomic, readonly) uint8_t *mutableDataY;
+@property(nonatomic, readonly) uint8_t *mutableDataU;
+@property(nonatomic, readonly) uint8_t *mutableDataV;
+
+@end
+
+/** Protocol for RTCYUVPlanarBuffers containing I420 data */
+@protocol RTCI420Buffer <RTCYUVPlanarBuffer>
+@end
+
+/** Extension of the I420 buffer with mutable data access */
+@protocol RTCMutableI420Buffer <RTCI420Buffer, RTCMutableYUVPlanarBuffer>
+@end
+
+/** RTCVideoFrameBuffer containing a CVPixelBufferRef */
+@interface RTCCVPixelBuffer : NSObject <RTCVideoFrameBuffer>
+
+@property(nonatomic, readonly) CVPixelBufferRef pixelBuffer;
+
+- (instancetype)initWithPixelBuffer:(CVPixelBufferRef)pixelBuffer;
+- (instancetype)initWithPixelBuffer:(CVPixelBufferRef)pixelBuffer
+                       adaptedWidth:(int)adaptedWidth
+                      adaptedHeight:(int)adaptedHeight
+                          cropWidth:(int)cropWidth
+                         cropHeight:(int)cropHeight
+                              cropX:(int)cropX
+                              cropY:(int)cropY;
+
+- (BOOL)requiresCropping;
+- (BOOL)requiresScalingToWidth:(int)width height:(int)height;
+- (int)bufferSizeForCroppingAndScalingToWidth:(int)width height:(int)height;
+/** The minimum size of the |tmpBuffer| must be the number of bytes returned from the
+ * bufferSizeForCroppingAndScalingToWidth:height: method.
+ */
+- (BOOL)cropAndScaleTo:(CVPixelBufferRef)outputPixelBuffer withTempBuffer:(uint8_t *)tmpBuffer;
+
+@end
+
+/** RTCI420Buffer implements the RTCI420Buffer protocol */
+@interface RTCI420Buffer : NSObject <RTCI420Buffer>
+@end
+
+/** Mutable version of RTCI420Buffer */
+@interface RTCMutableI420Buffer : RTCI420Buffer <RTCMutableI420Buffer>
+@end
+
+NS_ASSUME_NONNULL_END