Add CoreVideoFrameBuffer.

webrtc/api/objc/RTCVideoFrame.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 "RTCVideoFrame.h"
 
 #include "webrtc/base/scoped_ptr.h"
 
 #import "webrtc/api/objc/RTCVideoFrame+Private.h"
 
 @implementation RTCVideoFrame {
   rtc::scoped_ptr<cricket::VideoFrame> _videoFrame;
+  rtc::scoped_refptr<webrtc::VideoFrameBuffer> _i420Buffer;
 }
 
 - (size_t)width {
   return _videoFrame->GetWidth();
 }
 
 - (size_t)height {
   return _videoFrame->GetHeight();
 }
 
 - (size_t)chromaWidth {
   return _videoFrame->GetChromaWidth();
 }
 
 - (size_t)chromaHeight {
   return _videoFrame->GetChromaHeight();
 }
 
 - (size_t)chromaSize {
   return _videoFrame->GetChromaSize();
 }
 
 - (const uint8_t *)yPlane {
-  const cricket::VideoFrame *const_frame = _videoFrame.get();
-  return const_frame->GetYPlane();
+  if (!self.i420Buffer) {
+    return nullptr;
+  }
+  return self.i420Buffer->data(webrtc::kYPlane);
 }
 
 - (const uint8_t *)uPlane {
-  const cricket::VideoFrame *const_frame = _videoFrame.get();
-  return const_frame->GetUPlane();
+  if (!self.i420Buffer) {
+    return nullptr;
+  }
+  return self.i420Buffer->data(webrtc::kUPlane);
 }
 
 - (const uint8_t *)vPlane {
-  const cricket::VideoFrame *const_frame = _videoFrame.get();
-  return const_frame->GetVPlane();
+  if (!self.i420Buffer) {
+    return nullptr;
+  }
+  return self.i420Buffer->data(webrtc::kVPlane);
 }
 
 - (int32_t)yPitch {
-  return _videoFrame->GetYPitch();
+  if (!self.i420Buffer) {
+    return 0;
+  }
+  return self.i420Buffer->stride(webrtc::kYPlane);
 }
 
 - (int32_t)uPitch {
-  return _videoFrame->GetUPitch();
+  if (!self.i420Buffer) {
+    return 0;
+  }
+  return self.i420Buffer->stride(webrtc::kUPlane);
 }
 
 - (int32_t)vPitch {
-  return _videoFrame->GetVPitch();
+  if (!self.i420Buffer) {
+    return 0;
+  }
+  return self.i420Buffer->stride(webrtc::kVPlane);
+}
+
+- (int64_t)timeStamp {
+  return _videoFrame->GetTimeStamp();
+}
+
+- (CVPixelBufferRef)nativeHandle {
+  return static_cast<CVPixelBufferRef>(_videoFrame->GetNativeHandle());
+}
+
+- (void)convertBufferIfNeeded {
+  if (!_i420Buffer) {
+    if (_videoFrame->GetNativeHandle()) {
+      // Convert to I420.
+      _i420Buffer = _videoFrame->GetVideoFrameBuffer()->NativeToI420Buffer();
+    } else {
+      // Should already be I420.
+      _i420Buffer = _videoFrame->GetVideoFrameBuffer();
+    }
+  }
 }
 
 #pragma mark - Private
 
 - (instancetype)initWithNativeFrame:(const cricket::VideoFrame *)nativeFrame {
   if (self = [super init]) {
     // Keep a shallow copy of the video frame. The underlying frame buffer is
     // not copied.
     _videoFrame.reset(nativeFrame->Copy());
   }
   return self;
 }
 
+- (rtc::scoped_refptr<webrtc::VideoFrameBuffer>)i420Buffer {
+  [self convertBufferIfNeeded];
+  return _i420Buffer;
+}
+
 @end