FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/dvbsub.c
Date: 2022-12-05 20:26:17
Exec Total Coverage
Lines: 26 26 100.0%
Functions: 1 1 100.0%
Branches: 24 24 100.0%

Line Branch Exec Source
1 /*
2 * RAW dvbsub demuxer
3 * Copyright (c) 2015 Michael Niedermayer <michaelni@gmx.at>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/intreadwrite.h"
23
24 #include "avformat.h"
25 #include "rawdec.h"
26
27
28 6782 static int dvbsub_probe(const AVProbeData *p)
29 {
30 int i, j, k;
31 6782 const uint8_t *end = p->buf + p->buf_size;
32 int type, len;
33 6782 int max_score = 0;
34
35
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139396066 for(i=0; i<p->buf_size; i++){
36
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139389284 if (p->buf[i] == 0x0f) {
37 985199 const uint8_t *ptr = p->buf + i;
38 985199 uint8_t histogram[6] = {0};
39 985199 int min = 255;
40
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999357 for(j=0; 6 < end - ptr; j++) {
41
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999246 if (*ptr != 0x0f)
42 14056 break;
43 985190 type = ptr[1];
44 //page_id = AV_RB16(ptr + 2);
45 985190 len = AV_RB16(ptr + 4);
46
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985190 if (type == 0x80) {
47 ;
48
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983155 } else if (type >= 0x10 && type <= 0x14) {
49 19074 histogram[type - 0x10] ++;
50 } else
51 break;
52
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21109 if (6 + len > end - ptr)
53 6951 break;
54 14158 ptr += 6 + len;
55 }
56
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4925995 for (k=0; k < 4; k++) {
57 3940796 min = FFMIN(min, histogram[k]);
58 }
59
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985199 if (min && j > max_score)
60 1 max_score = j;
61 }
62 }
63
64
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6782 if (max_score > 5)
65 1 return AVPROBE_SCORE_EXTENSION;
66
67 6781 return 0;
68 }
69
70 FF_DEF_RAWSUB_DEMUXER(dvbsub, "raw dvbsub", dvbsub_probe, NULL, AV_CODEC_ID_DVB_SUBTITLE, AVFMT_GENERIC_INDEX)
71