FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/stldec.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 42 44 95.5%
Functions: 3 3 100.0%
Branches: 21 26 80.8%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2014 Eejya Singh
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 /**
22 * @file
23 * STL subtitles format demuxer
24 * @see https://documentation.apple.com/en/dvdstudiopro/usermanual/index.html#chapter=19%26section=13%26tasks=true
25 */
26
27 #include "avformat.h"
28 #include "demux.h"
29 #include "internal.h"
30 #include "subtitles.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/avstring.h"
33
34 typedef struct {
35 FFDemuxSubtitlesQueue q;
36 } STLContext;
37
38 7186 static int stl_probe(const AVProbeData *p)
39 {
40 char c;
41 7186 const unsigned char *ptr = p->buf;
42
43
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 7186 if (AV_RB24(ptr) == 0xEFBBBF)
44 9 ptr += 3; /* skip UTF-8 BOM */
45
46
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 7215 while (*ptr == '\r' || *ptr == '\n' || *ptr == '$' || !strncmp(ptr, "//" , 2))
47 29 ptr += ff_subtitles_next_line(ptr);
48
49
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 7186 if (sscanf(ptr, "%*d:%*d:%*d:%*d , %*d:%*d:%*d:%*d , %c", &c) == 1)
50 1 return AVPROBE_SCORE_MAX;
51
52 7185 return 0;
53 }
54
55 54 static int64_t get_pts(char **buf, int *duration)
56 {
57 int hh1, mm1, ss1, ms1;
58 int hh2, mm2, ss2, ms2;
59 54 int len = 0;
60
61
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 54 if (sscanf(*buf, "%2d:%2d:%2d:%2d , %2d:%2d:%2d:%2d , %n",
62 &hh1, &mm1, &ss1, &ms1,
63
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 17 &hh2, &mm2, &ss2, &ms2, &len) >= 8 && len > 0) {
64 17 int64_t start = (hh1*3600LL + mm1*60LL + ss1) * 100LL + ms1;
65 17 int64_t end = (hh2*3600LL + mm2*60LL + ss2) * 100LL + ms2;
66 17 *duration = end - start;
67 17 *buf += len;
68 17 return start;
69 }
70 37 return AV_NOPTS_VALUE;
71 }
72
73 1 static int stl_read_header(AVFormatContext *s)
74 {
75 1 STLContext *stl = s->priv_data;
76 1 AVStream *st = avformat_new_stream(s, NULL);
77
78
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 1 if (!st)
79 ✗ return AVERROR(ENOMEM);
80 1 avpriv_set_pts_info(st, 64, 1, 100);
81 1 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
82 1 st->codecpar->codec_id = AV_CODEC_ID_STL;
83
84
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 55 while (!avio_feof(s->pb)) {
85 char line[4096];
86 55 char *p = line;
87 55 const int64_t pos = avio_tell(s->pb);
88 55 int len = ff_get_line(s->pb, line, sizeof(line));
89 int64_t pts_start;
90 int duration;
91
92
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 55 if (!len)
93 1 break;
94
95 54 line[strcspn(line, "\r\n")] = 0;
96 54 pts_start = get_pts(&p , &duration);
97
98
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 54 if (pts_start != AV_NOPTS_VALUE) {
99 AVPacket *sub;
100 17 sub = ff_subtitles_queue_insert(&stl->q, p, strlen(p), 0);
101
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 17 if (!sub)
102 ✗ return AVERROR(ENOMEM);
103 17 sub->pos = pos;
104 17 sub->pts = pts_start;
105 17 sub->duration = duration;
106 }
107 }
108 1 ff_subtitles_queue_finalize(s, &stl->q);
109 1 return 0;
110 }
111
112 const FFInputFormat ff_stl_demuxer = {
113 .p.name = "stl",
114 .p.long_name = NULL_IF_CONFIG_SMALL("Spruce subtitle format"),
115 .p.extensions = "stl",
116 .priv_data_size = sizeof(STLContext),
117 .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
118 .read_probe = stl_probe,
119 .read_header = stl_read_header,
120 .read_packet = ff_subtitles_read_packet,
121 .read_seek2 = ff_subtitles_read_seek,
122 .read_close = ff_subtitles_read_close,
123 };
124