aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* Header file for hardcoded motion pixels RGB to YUV table
*
* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_MOTIONPIXELS_TABLEGEN_H
#define AVCODEC_MOTIONPIXELS_TABLEGEN_H
#include <stdint.h>
#include "libavutil/attributes.h"
typedef struct YuvPixel {
int8_t y, v, u;
} YuvPixel;
static int mp_yuv_to_rgb(int y, int v, int u, int clip_rgb) {
const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
int r, g, b;
r = (1000 * y + 701 * v) / 1000;
g = (1000 * y - 357 * v - 172 * u) / 1000;
b = (1000 * y + 886 * u) / 1000;
if (clip_rgb)
return ((cm[r * 8] & 0xF8) << 7) | ((cm[g * 8] & 0xF8) << 2) | (cm[b * 8] >> 3);
if ((unsigned)r < 32 && (unsigned)g < 32 && (unsigned)b < 32)
return (r << 10) | (g << 5) | b;
return 1 << 15;
}
#if CONFIG_HARDCODED_TABLES
#define motionpixels_tableinit()
#include "libavcodec/motionpixels_tables.h"
#else
static YuvPixel mp_rgb_yuv_table[1 << 15];
static av_cold void mp_set_zero_yuv(YuvPixel *p)
{
int i, j;
for (i = 0; i < 31; ++i) {
for (j = 31; j > i; --j)
if (!(p[j].u | p[j].v | p[j].y))
p[j] = p[j - 1];
for (j = 0; j < 31 - i; ++j)
if (!(p[j].u | p[j].v | p[j].y))
p[j] = p[j + 1];
}
}
static av_cold void mp_build_rgb_yuv_table(YuvPixel *p)
{
int y, v, u, i;
for (y = 0; y <= 31; ++y)
for (v = -31; v <= 31; ++v)
for (u = -31; u <= 31; ++u) {
i = mp_yuv_to_rgb(y, v, u, 0);
if (i < (1 << 15) && !(p[i].u | p[i].v | p[i].y)) {
p[i].y = y;
p[i].v = v;
p[i].u = u;
}
}
for (i = 0; i < 1024; ++i)
mp_set_zero_yuv(p + i * 32);
}
static av_cold void motionpixels_tableinit(void)
{
if (!mp_rgb_yuv_table[0].u)
mp_build_rgb_yuv_table(mp_rgb_yuv_table);
}
#endif /* CONFIG_HARDCODED_TABLES */
#endif /* AVCODEC_MOTIONPIXELS_TABLEGEN_H */
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