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  1. /*
  2.  * Header file for hardcoded motionpixels RGB to YUV table
  3.  *
  4.  * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. #ifndef AVCODEC_MOTIONPIXELS_TABLEGEN_H
  24. #define AVCODEC_MOTIONPIXELS_TABLEGEN_H
  25.  
  26. #include <stdint.h>
  27.  
  28. typedef struct YuvPixel {
  29.     int8_t y, v, u;
  30. } YuvPixel;
  31.  
  32. static int mp_yuv_to_rgb(int y, int v, int u, int clip_rgb) {
  33.     const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
  34.     int r, g, b;
  35.  
  36.     r = (1000 * y + 701 * v) / 1000;
  37.     g = (1000 * y - 357 * v - 172 * u) / 1000;
  38.     b = (1000 * y + 886 * u) / 1000;
  39.     if (clip_rgb)
  40.         return ((cm[r * 8] & 0xF8) << 7) | ((cm[g * 8] & 0xF8) << 2) | (cm[b * 8] >> 3);
  41.     if ((unsigned)r < 32 && (unsigned)g < 32 && (unsigned)b < 32)
  42.         return (r << 10) | (g << 5) | b;
  43.     return 1 << 15;
  44. }
  45.  
  46. #if CONFIG_HARDCODED_TABLES
  47. #define motionpixels_tableinit()
  48. #include "libavcodec/motionpixels_tables.h"
  49. #else
  50. static YuvPixel mp_rgb_yuv_table[1 << 15];
  51.  
  52. static void mp_set_zero_yuv(YuvPixel *p)
  53. {
  54.     int i, j;
  55.  
  56.     for (i = 0; i < 31; ++i) {
  57.         for (j = 31; j > i; --j)
  58.             if (!(p[j].u | p[j].v | p[j].y))
  59.                 p[j] = p[j - 1];
  60.         for (j = 0; j < 31 - i; ++j)
  61.             if (!(p[j].u | p[j].v | p[j].y))
  62.                 p[j] = p[j + 1];
  63.     }
  64. }
  65.  
  66. static void mp_build_rgb_yuv_table(YuvPixel *p)
  67. {
  68.     int y, v, u, i;
  69.  
  70.     for (y = 0; y <= 31; ++y)
  71.         for (v = -31; v <= 31; ++v)
  72.             for (u = -31; u <= 31; ++u) {
  73.                 i = mp_yuv_to_rgb(y, v, u, 0);
  74.                 if (i < (1 << 15) && !(p[i].u | p[i].v | p[i].y)) {
  75.                     p[i].y = y;
  76.                     p[i].v = v;
  77.                     p[i].u = u;
  78.                 }
  79.             }
  80.     for (i = 0; i < 1024; ++i)
  81.         mp_set_zero_yuv(p + i * 32);
  82. }
  83.  
  84. static void motionpixels_tableinit(void)
  85. {
  86.     if (!mp_rgb_yuv_table[0].u)
  87.         mp_build_rgb_yuv_table(mp_rgb_yuv_table);
  88. }
  89. #endif /* CONFIG_HARDCODED_TABLES */
  90.  
  91. #endif /* AVCODEC_MOTIONPIXELS_TABLEGEN_H */
  92.