LCOV - code coverage report
Current view: top level - libavcodec - motionpixels_tablegen.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 35 35 100.0 %
Date: 2017-12-17 16:07:53 Functions: 4 4 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Header file for hardcoded motion pixels RGB to YUV table
       3             :  *
       4             :  * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
       5             :  *
       6             :  * This file is part of FFmpeg.
       7             :  *
       8             :  * FFmpeg is free software; you can redistribute it and/or
       9             :  * modify it under the terms of the GNU Lesser General Public
      10             :  * License as published by the Free Software Foundation; either
      11             :  * version 2.1 of the License, or (at your option) any later version.
      12             :  *
      13             :  * FFmpeg is distributed in the hope that it will be useful,
      14             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16             :  * Lesser General Public License for more details.
      17             :  *
      18             :  * You should have received a copy of the GNU Lesser General Public
      19             :  * License along with FFmpeg; if not, write to the Free Software
      20             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      21             :  */
      22             : 
      23             : #ifndef AVCODEC_MOTIONPIXELS_TABLEGEN_H
      24             : #define AVCODEC_MOTIONPIXELS_TABLEGEN_H
      25             : 
      26             : #include <stdint.h>
      27             : #include "libavutil/attributes.h"
      28             : 
      29             : typedef struct YuvPixel {
      30             :     int8_t y, v, u;
      31             : } YuvPixel;
      32             : 
      33     5793151 : static int mp_yuv_to_rgb(int y, int v, int u, int clip_rgb) {
      34     5793151 :     const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
      35             :     int r, g, b;
      36             : 
      37     5793151 :     r = (1000 * y + 701 * v) / 1000;
      38     5793151 :     g = (1000 * y - 357 * v - 172 * u) / 1000;
      39     5793151 :     b = (1000 * y + 886 * u) / 1000;
      40     5793151 :     if (clip_rgb)
      41     5666143 :         return ((cm[r * 8] & 0xF8) << 7) | ((cm[g * 8] & 0xF8) << 2) | (cm[b * 8] >> 3);
      42      127008 :     if ((unsigned)r < 32 && (unsigned)g < 32 && (unsigned)b < 32)
      43       33922 :         return (r << 10) | (g << 5) | b;
      44       93086 :     return 1 << 15;
      45             : }
      46             : 
      47             : #if CONFIG_HARDCODED_TABLES
      48             : #define motionpixels_tableinit()
      49             : #include "libavcodec/motionpixels_tables.h"
      50             : #else
      51             : static YuvPixel mp_rgb_yuv_table[1 << 15];
      52             : 
      53        1024 : static av_cold void mp_set_zero_yuv(YuvPixel *p)
      54             : {
      55             :     int i, j;
      56             : 
      57       32768 :     for (i = 0; i < 31; ++i) {
      58      539648 :         for (j = 31; j > i; --j)
      59      507904 :             if (!(p[j].u | p[j].v | p[j].y))
      60       11975 :                 p[j] = p[j - 1];
      61      539648 :         for (j = 0; j < 31 - i; ++j)
      62      507904 :             if (!(p[j].u | p[j].v | p[j].y))
      63        6066 :                 p[j] = p[j + 1];
      64             :     }
      65        1024 : }
      66             : 
      67           1 : static av_cold void mp_build_rgb_yuv_table(YuvPixel *p)
      68             : {
      69             :     int y, v, u, i;
      70             : 
      71          33 :     for (y = 0; y <= 31; ++y)
      72        2048 :         for (v = -31; v <= 31; ++v)
      73      129024 :             for (u = -31; u <= 31; ++u) {
      74      127008 :                 i = mp_yuv_to_rgb(y, v, u, 0);
      75      127008 :                 if (i < (1 << 15) && !(p[i].u | p[i].v | p[i].y)) {
      76       23226 :                     p[i].y = y;
      77       23226 :                     p[i].v = v;
      78       23226 :                     p[i].u = u;
      79             :                 }
      80             :             }
      81        1025 :     for (i = 0; i < 1024; ++i)
      82        1024 :         mp_set_zero_yuv(p + i * 32);
      83           1 : }
      84             : 
      85           2 : static av_cold void motionpixels_tableinit(void)
      86             : {
      87           2 :     if (!mp_rgb_yuv_table[0].u)
      88           1 :         mp_build_rgb_yuv_table(mp_rgb_yuv_table);
      89           2 : }
      90             : #endif /* CONFIG_HARDCODED_TABLES */
      91             : 
      92             : #endif /* AVCODEC_MOTIONPIXELS_TABLEGEN_H */

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