Revert of Move CoreVideoFrameBuffer from webrtc/common_video/ to webrtc/sdk/objc/

webrtc/common_video/include/corevideo_frame_buffer.h

+/*
+ *  Copyright 2016 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_COREVIDEO_FRAME_BUFFER_H_
+#define WEBRTC_COMMON_VIDEO_INCLUDE_COREVIDEO_FRAME_BUFFER_H_
+
+#include <CoreVideo/CoreVideo.h>
+
+#include <vector>
+
+#include "webrtc/common_video/include/video_frame_buffer.h"
+
+namespace webrtc {
+
+class CoreVideoFrameBuffer : public NativeHandleBuffer {
+ public:
+  explicit CoreVideoFrameBuffer(CVPixelBufferRef pixel_buffer);
+  CoreVideoFrameBuffer(CVPixelBufferRef pixel_buffer,
+                       int adapted_width,
+                       int adapted_height,
+                       int crop_width,
+                       int crop_height,
+                       int crop_x,
+                       int crop_y);
+  ~CoreVideoFrameBuffer() override;
+
+  rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override;
+  // Returns true if the internal pixel buffer needs to be cropped.
+  bool RequiresCropping() const;
+  // Crop and scales the internal pixel buffer to the output pixel buffer. The
+  // tmp buffer is used for intermediary splitting the UV channels. This
+  // function returns true if successful.
+  bool CropAndScaleTo(std::vector<uint8_t>* tmp_buffer,
+                      CVPixelBufferRef output_pixel_buffer) const;
+
+ private:
+  CVPixelBufferRef pixel_buffer_;
+  // buffer_width/height is the actual pixel buffer resolution. The width/height
+  // in NativeHandleBuffer, i.e. width()/height(), is the resolution we will
+  // scale to in NativeToI420Buffer(). Cropping happens before scaling, so:
+  // buffer_width >= crop_width >= width().
+  const int buffer_width_;
+  const int buffer_height_;
+  const int crop_width_;
+  const int crop_height_;
+  const int crop_x_;
+  const int crop_y_;
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_COMMON_VIDEO_INCLUDE_COREVIDEO_FRAME_BUFFER_H_