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motionpixels_tablegen.h
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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 
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 */