ScaleYV12 optimization....

media/base/yuv_scale.h

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef MEDIA_BASE_YUV_SCALE_H_
-#define MEDIA_BASE_YUV_SCALE_H_
-
-#include "base/basictypes.h"
-
-namespace media {
-
-// Mirror means flip the image horizontally, as in looking in a mirror.
-// Rotate happens after mirroring.
-
-enum Rotate {
-  ROTATE_0,           // Rotation off.
-  ROTATE_90,          // Rotate clockwise.
-  ROTATE_180,         // Rotate upside down.
-  ROTATE_270,         // Rotate counter clockwise.
-  MIRROR_ROTATE_0,    // Mirror horizontally.
-  MIRROR_ROTATE_90,   // Mirror then Rotate clockwise.
-  MIRROR_ROTATE_180,  // Mirror vertically.
-  MIRROR_ROTATE_270,  // Transpose.
-};
-
-// Diagram showing origin and direction of source sampling.
-// ->0   4<-
-// 7       3
-//
-// 6       5
-// ->1   2<-
-
-// Scale a frame of YV12 (aka YUV420) to 32 bit ARGB.
-void ScaleYV12ToRGB32(const uint8* yplane,
-                      const uint8* uplane,
-                      const uint8* vplane,
-                      uint8* rgbframe,
-                      int frame_width,
-                      int frame_height,
-                      int scaled_width,
-                      int scaled_height,
-                      int ystride,
-                      int uvstride,
-                      int rgbstride,
-                      Rotate view_rotate);
-
-// Scale a frame of YV16 (aka YUV422) to 32 bit ARGB.
-void ScaleYV16ToRGB32(const uint8* yplane,
-                      const uint8* uplane,
-                      const uint8* vplane,
-                      uint8* rgbframe,
-                      int frame_width,
-                      int frame_height,
-                      int scaled_width,
-                      int scaled_height,
-                      int ystride,
-                      int uvstride,
-                      int rgbstride,
-                      Rotate view_rotate);
-
-}  // namespace media
-
-#endif  // MEDIA_BASE_YUV_SCALE_H_
-