Refactor scaling.

webrtc/common_video/libyuv/include/webrtc_libyuv.h

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 67 matching lines @@
 
 // TODO(mikhal): Add unit test for these two functions and determine location.
 // Print VideoFrame to file
 // Input:
 //    - frame       : Reference to video frame.
 //    - file        : pointer to file object. It is assumed that the file is
 //                    already open for writing.
 // Return value: 0 if OK, < 0 otherwise.
 int PrintVideoFrame(const VideoFrame& frame, FILE* file);
 
-// Extract buffer from VideoFrame (consecutive planes, no stride)
+// Extract buffer from VideoFrame or VideoFrameBuffer (consecutive
+// planes, no stride)
 // Input:
 //   - frame       : Reference to video frame.
 //   - size        : pointer to the size of the allocated buffer. If size is
 //                   insufficient, an error will be returned.
 //   - buffer      : Pointer to buffer
 // Return value: length of buffer if OK, < 0 otherwise.
+int ExtractBuffer(const rtc::scoped_refptr<VideoFrameBuffer>& input_frame,

[pbos-webrtc, 2016/05/31 14:14:01]

const VideoFrameBuffer& src

+                  size_t size,
+                  uint8_t* buffer);
 int ExtractBuffer(const VideoFrame& input_frame, size_t size, uint8_t* buffer);
 // Convert To I420
 // Input:
 //   - src_video_type   : Type of input video.
 //   - src_frame        : Pointer to a source frame.
 //   - crop_x/crop_y    : Starting positions for cropping (0 for no crop).
 //   - src_width        : src width in pixels.
 //   - src_height       : src height in pixels.
 //   - sample_size      : Required only for the parsing of MJPG (set to 0 else).
 //   - rotate           : Rotation mode of output image.
@@ skipping 44 matching lines @@
 
 // Compute PSNR for an I420 frame (all planes).
 // Returns the PSNR in decibel, to a maximum of kInfinitePSNR.
 double I420PSNR(const VideoFrame* ref_frame, const VideoFrame* test_frame);
 // Compute SSIM for an I420 frame (all planes).
 double I420SSIM(const VideoFrame* ref_frame, const VideoFrame* test_frame);
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_VIDEO_LIBYUV_INCLUDE_WEBRTC_LIBYUV_H_