FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/dvdclut.c
Date: 2025-01-20 09:27:23
Exec Total Coverage
Lines: 0 23 0.0%
Functions: 0 2 0.0%
Branches: 0 10 0.0%

Line Branch Exec Source
1 /*
2 * DVD-Video subpicture CLUT (Color Lookup Table) utilities
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "libavutil/bprint.h"
22 #include "libavutil/colorspace.h"
23 #include "libavutil/common.h"
24
25 #include "dvdclut.h"
26 #include "internal.h"
27
28 int ff_dvdclut_palette_extradata_cat(const uint32_t *clut,
29 const size_t clut_size,
30 AVCodecParameters *par)
31 {
32 AVBPrint bp;
33
34 if (clut_size != FF_DVDCLUT_CLUT_SIZE)
35 return AVERROR(EINVAL);
36
37 av_bprint_init(&bp, 0, FF_DVDCLUT_EXTRADATA_SIZE);
38
39 av_bprintf(&bp, "palette: ");
40
41 for (int i = 0; i < FF_DVDCLUT_CLUT_LEN; i++)
42 av_bprintf(&bp, "%06"PRIx32"%s", clut[i],
43 i != (FF_DVDCLUT_CLUT_LEN - 1) ? ", " : "");
44
45 av_bprintf(&bp, "\n");
46
47 return ff_bprint_to_codecpar_extradata(par, &bp);
48 }
49
50 int ff_dvdclut_yuv_to_rgb(uint32_t *clut, const size_t clut_size)
51 {
52 int y, cb, cr;
53 uint8_t r, g, b;
54 int r_add, g_add, b_add;
55
56 if (clut_size != FF_DVDCLUT_CLUT_SIZE)
57 return AVERROR(EINVAL);
58
59 for (int i = 0; i < FF_DVDCLUT_CLUT_LEN; i++) {
60 y = (clut[i] >> 16) & 0xFF;
61 cr = (clut[i] >> 8) & 0xFF;
62 cb = clut[i] & 0xFF;
63
64 YUV_TO_RGB1_CCIR(cb, cr);
65
66 y = (y - 16) * FIX(255.0 / 219.0);
67 r = av_clip_uint8((y + r_add - 1024) >> SCALEBITS);
68 g = av_clip_uint8((y + g_add - 1024) >> SCALEBITS);
69 b = av_clip_uint8((y + b_add - 1024) >> SCALEBITS);
70
71 clut[i] = (r << 16) | (g << 8) | b;
72 }
73
74 return 0;
75 }
76