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/* |
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* Header file for hardcoded motion pixels 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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✓✓ |
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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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✓✓✓✓
✓✓ |
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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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✓✓ |
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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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✓✓ |
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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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✓✓ |
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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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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 */ |