vpx/vpx_scale/yv12config.h

/*
 *  Copyright (c) 2010 The WebM 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 YV12_CONFIG_H
#define YV12_CONFIG_H
#ifdef __cplusplus
extern "C"
{
#endif

#define VP8BORDERINPIXELS       32
#define VP9BORDERINPIXELS       64
#define VP9_INTERP_EXTEND        4

  /*************************************
   For INT_YUV:

   Y = (R+G*2+B)/4;
   U = (R-B)/2;
   V =  (G*2 - R - B)/4;
  And
   R = Y+U-V;
   G = Y+V;
   B = Y-U-V;
  ************************************/
  typedef enum
  {
    REG_YUV = 0,    /* Regular yuv */
    INT_YUV = 1     /* The type of yuv that can be tranfer to and from RGB through integer transform */
  }
            YUV_TYPE;

  typedef struct yv12_buffer_config {
    int   y_width;
    int   y_height;
    int   y_stride;
    /*    int   yinternal_width; */

    int   uv_width;
    int   uv_height;
    int   uv_stride;
    /*    int   uvinternal_width; */

    unsigned char *y_buffer;
    unsigned char *u_buffer;
    unsigned char *v_buffer;

    unsigned char *buffer_alloc;
    int border;
    int frame_size;
    YUV_TYPE clrtype;

    int corrupted;
    int flags;
  } YV12_BUFFER_CONFIG;

  int vp8_yv12_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height, int border);
  int vp8_yv12_de_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf);

#ifdef __cplusplus
}
#endif


#endif /*YV12_CONFIG_H*/