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93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/*
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* Header file for hardcoded motionpixels RGB to YUV table
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*
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* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_MOTIONPIXELS_TABLEGEN_H
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#define AVCODEC_MOTIONPIXELS_TABLEGEN_H
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#include <stdint.h>
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#include "libavutil/attributes.h"
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typedef struct YuvPixel {
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int8_t y, v, u;
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} YuvPixel;
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static int mp_yuv_to_rgb(int y, int v, int u, int clip_rgb) {
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const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
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int r, g, b;
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r = (1000 * y + 701 * v) / 1000;
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g = (1000 * y - 357 * v - 172 * u) / 1000;
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b = (1000 * y + 886 * u) / 1000;
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if (clip_rgb)
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return ((cm[r * 8] & 0xF8) << 7) | ((cm[g * 8] & 0xF8) << 2) | (cm[b * 8] >> 3);
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if ((unsigned)r < 32 && (unsigned)g < 32 && (unsigned)b < 32)
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return (r << 10) | (g << 5) | b;
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return 1 << 15;
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}
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#if CONFIG_HARDCODED_TABLES
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#define motionpixels_tableinit()
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#include "libavcodec/motionpixels_tables.h"
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#else
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static YuvPixel mp_rgb_yuv_table[1 << 15];
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static av_cold void mp_set_zero_yuv(YuvPixel *p)
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{
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int i, j;
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for (i = 0; i < 31; ++i) {
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for (j = 31; j > i; --j)
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if (!(p[j].u | p[j].v | p[j].y))
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p[j] = p[j - 1];
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for (j = 0; j < 31 - i; ++j)
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if (!(p[j].u | p[j].v | p[j].y))
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p[j] = p[j + 1];
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}
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}
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static av_cold void mp_build_rgb_yuv_table(YuvPixel *p)
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{
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int y, v, u, i;
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for (y = 0; y <= 31; ++y)
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for (v = -31; v <= 31; ++v)
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for (u = -31; u <= 31; ++u) {
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i = mp_yuv_to_rgb(y, v, u, 0);
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if (i < (1 << 15) && !(p[i].u | p[i].v | p[i].y)) {
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p[i].y = y;
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p[i].v = v;
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p[i].u = u;
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}
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}
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for (i = 0; i < 1024; ++i)
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mp_set_zero_yuv(p + i * 32);
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}
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static av_cold void motionpixels_tableinit(void)
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{
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if (!mp_rgb_yuv_table[0].u)
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mp_build_rgb_yuv_table(mp_rgb_yuv_table);
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}
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#endif /* CONFIG_HARDCODED_TABLES */
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#endif /* AVCODEC_MOTIONPIXELS_TABLEGEN_H */
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