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