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ffmpeg / libavcodec / motionpixels_tablegen.h @ 2912e87a

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/*
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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 Libav.
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 *
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 * Libav 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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 * Libav 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 Libav; 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 MOTIONPIXELS_TABLEGEN_H
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#define MOTIONPIXELS_TABLEGEN_H
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#include <stdint.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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    static const uint8_t *cm = ff_cropTbl + 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 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 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 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 /* MOTIONPIXELS_TABLEGEN_H */