1/*
2 * Header file for hardcoded motion pixels 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#include "libavutil/attributes.h"
28
29typedef struct YuvPixel {
30    int8_t y, v, u;
31} YuvPixel;
32
33static int mp_yuv_to_rgb(int y, int v, int u, int clip_rgb) {
34    const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
35    int r, g, b;
36
37    r = (1000 * y + 701 * v) / 1000;
38    g = (1000 * y - 357 * v - 172 * u) / 1000;
39    b = (1000 * y + 886 * u) / 1000;
40    if (clip_rgb)
41        return ((cm[r * 8] & 0xF8) << 7) | ((cm[g * 8] & 0xF8) << 2) | (cm[b * 8] >> 3);
42    if ((unsigned)r < 32 && (unsigned)g < 32 && (unsigned)b < 32)
43        return (r << 10) | (g << 5) | b;
44    return 1 << 15;
45}
46
47#if CONFIG_HARDCODED_TABLES
48#define motionpixels_tableinit()
49#include "libavcodec/motionpixels_tables.h"
50#else
51static YuvPixel mp_rgb_yuv_table[1 << 15];
52
53static av_cold void mp_set_zero_yuv(YuvPixel *p)
54{
55    int i, j;
56
57    for (i = 0; i < 31; ++i) {
58        for (j = 31; j > i; --j)
59            if (!(p[j].u | p[j].v | p[j].y))
60                p[j] = p[j - 1];
61        for (j = 0; j < 31 - i; ++j)
62            if (!(p[j].u | p[j].v | p[j].y))
63                p[j] = p[j + 1];
64    }
65}
66
67static av_cold void mp_build_rgb_yuv_table(YuvPixel *p)
68{
69    int y, v, u, i;
70
71    for (y = 0; y <= 31; ++y)
72        for (v = -31; v <= 31; ++v)
73            for (u = -31; u <= 31; ++u) {
74                i = mp_yuv_to_rgb(y, v, u, 0);
75                if (i < (1 << 15) && !(p[i].u | p[i].v | p[i].y)) {
76                    p[i].y = y;
77                    p[i].v = v;
78                    p[i].u = u;
79                }
80            }
81    for (i = 0; i < 1024; ++i)
82        mp_set_zero_yuv(p + i * 32);
83}
84
85static av_cold void motionpixels_tableinit(void)
86{
87    mp_build_rgb_yuv_table(mp_rgb_yuv_table);
88}
89#endif /* CONFIG_HARDCODED_TABLES */
90
91#endif /* AVCODEC_MOTIONPIXELS_TABLEGEN_H */
92