vpx_scale/yv12config.h

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11
  12 #ifndef YV12_CONFIG_H
  13 #define YV12_CONFIG_H
  14 #ifdef __cplusplus
  15 extern "C"
  16 {
  17 #endif
  18
  19 #define VP7BORDERINPIXELS       48
  20 #define VP8BORDERINPIXELS       32
  21
  22     /*************************************
  23      For INT_YUV:
  24
  25      Y = (R+G*2+B)/4;
  26      U = (R-B)/2;
  27      V =  (G*2 - R - B)/4;
  28     And
  29      R = Y+U-V;
  30      G = Y+V;
  31      B = Y-U-V;
  32     ************************************/
  33     typedef enum
  34     {
  35         REG_YUV = 0,    /* Regular yuv */
  36         INT_YUV = 1     /* The type of yuv that can be tranfer to and from RGB through integer transform */
  37               }
  38               YUV_TYPE;
  39
  40     typedef struct
  41     {
  42         int   y_width;
  43         int   y_height;
  44         int   y_stride;
  45 /*    int   yinternal_width; */
  46
  47         int   uv_width;
  48         int   uv_height;
  49         int   uv_stride;
  50 /*    int   uvinternal_width; */
  51
  52         unsigned char *y_buffer;
  53         unsigned char *u_buffer;
  54         unsigned char *v_buffer;
  55
  56         unsigned char *buffer_alloc;
  57         int border;
  58         int frame_size;
  59         YUV_TYPE clrtype;
  60
  61         int corrupted;
  62         int flags;
  63     } YV12_BUFFER_CONFIG;
  64
  65     int vp8_yv12_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height, int border);
  66     int vp8_yv12_de_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf);
  67
  68 #ifdef __cplusplus
  69 }
  70 #endif
  71
  72
  73 #endif /*YV12_CONFIG_H*/