Add CoreVideoFrameBuffer.

webrtc/common_video/include/video_frame_buffer.h

 /*
  *  Copyright (c) 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.
  */
 
 #ifndef WEBRTC_COMMON_VIDEO_INCLUDE_VIDEO_FRAME_BUFFER_H_
 #define WEBRTC_COMMON_VIDEO_INCLUDE_VIDEO_FRAME_BUFFER_H_
 
 #include <stdint.h>
 
+#if defined(WEBRTC_MAC) || defined(WEBRTC_IOS)
+#include <CoreVideo/CoreVideo.h>
+#endif
 #include <memory>
 
 #include "webrtc/base/callback.h"
 #include "webrtc/base/refcount.h"
 #include "webrtc/base/scoped_ref_ptr.h"
 #include "webrtc/system_wrappers/include/aligned_malloc.h"
 
 namespace webrtc {
 
 enum PlaneType {
@@ skipping 127 matching lines @@
   rtc::Callback0<void> no_longer_used_cb_;
 };
 
 // Helper function to crop |buffer| without making a deep copy. May only be used
 // for non-native frames.
 rtc::scoped_refptr<VideoFrameBuffer> ShallowCenterCrop(
     const rtc::scoped_refptr<VideoFrameBuffer>& buffer,
     int cropped_width,
     int cropped_height);
 
+#if defined(WEBRTC_MAC) || defined(WEBRTC_IOS)

[pbos-webrtc, 2016/04/01 11:56:10]

This class should go into a separate header I think.

[tkchin_webrtc, 2016/04/01 16:09:29]

Done.

+
+class CoreVideoFrameBuffer : public NativeHandleBuffer {
+ public:
+  explicit CoreVideoFrameBuffer(CVPixelBufferRef pixel_buffer);
+  virtual ~CoreVideoFrameBuffer();
+
+  rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override;
+
+ private:
+  CVPixelBufferRef pixel_buffer_;
+};
+
+#endif  // defined(WEBRTC_MAC) || defined(WEBRTC_IOS)
+
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_VIDEO_INCLUDE_VIDEO_FRAME_BUFFER_H_