FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/pjsdec.c
Date: 2022-11-26 13:19:19
Exec Total Coverage
Lines: 39 43 90.7%
Branches: 12 20 60.0%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2012 Clément Bœsch
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 * PJS (Phoenix Japanimation Society) subtitles format demuxer
24 *
25 * @see http://subs.com.ru/page.php?al=pjs
26 */
27
28 #include "avformat.h"
29 #include "internal.h"
30 #include "subtitles.h"
31
32 typedef struct {
33 FFDemuxSubtitlesQueue q;
34 } PJSContext;
35
36 6780 static int pjs_probe(const AVProbeData *p)
37 {
38 char c;
39 int64_t start, end;
40 6780 const unsigned char *ptr = p->buf;
41
42
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6780 if (sscanf(ptr, "%"SCNd64",%"SCNd64",%c", &start, &end, &c) == 3) {
43 1 size_t q1pos = strcspn(ptr, "\"");
44 1 size_t q2pos = q1pos + strcspn(ptr + q1pos + 1, "\"") + 1;
45
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1 if (strcspn(ptr, "\r\n") > q2pos)
46 1 return AVPROBE_SCORE_MAX;
47 }
48 6779 return 0;
49 }
50
51 3 static int64_t read_ts(char **line, int *duration)
52 {
53 int64_t start, end;
54
55
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3 if (sscanf(*line, "%"SCNd64",%"SCNd64, &start, &end) == 2) {
56 3 *line += strcspn(*line, "\"");
57 3 *line += !!**line;
58
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3 if (end < start || end - (uint64_t)start > INT_MAX)
59 return AV_NOPTS_VALUE;
60 3 *duration = end - start;
61 3 return start;
62 }
63 return AV_NOPTS_VALUE;
64 }
65
66 1 static int pjs_read_header(AVFormatContext *s)
67 {
68 1 PJSContext *pjs = s->priv_data;
69 1 AVStream *st = avformat_new_stream(s, NULL);
70
71
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1 if (!st)
72 return AVERROR(ENOMEM);
73 1 avpriv_set_pts_info(st, 64, 1, 10);
74 1 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
75 1 st->codecpar->codec_id = AV_CODEC_ID_PJS;
76
77
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4 while (!avio_feof(s->pb)) {
78 char line[4096];
79 4 char *p = line;
80 4 const int64_t pos = avio_tell(s->pb);
81 4 int len = ff_get_line(s->pb, line, sizeof(line));
82 int64_t pts_start;
83 int duration;
84
85
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4 if (!len)
86 1 break;
87
88 3 line[strcspn(line, "\r\n")] = 0;
89
90 3 pts_start = read_ts(&p, &duration);
91
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3 if (pts_start != AV_NOPTS_VALUE) {
92 AVPacket *sub;
93
94 3 p[strcspn(p, "\"")] = 0;
95 3 sub = ff_subtitles_queue_insert(&pjs->q, p, strlen(p), 0);
96
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3 if (!sub)
97 return AVERROR(ENOMEM);
98 3 sub->pos = pos;
99 3 sub->pts = pts_start;
100 3 sub->duration = duration;
101 }
102 }
103
104 1 ff_subtitles_queue_finalize(s, &pjs->q);
105 1 return 0;
106 }
107
108 const AVInputFormat ff_pjs_demuxer = {
109 .name = "pjs",
110 .long_name = NULL_IF_CONFIG_SMALL("PJS (Phoenix Japanimation Society) subtitles"),
111 .priv_data_size = sizeof(PJSContext),
112 .flags_internal = FF_FMT_INIT_CLEANUP,
113 .read_probe = pjs_probe,
114 .read_header = pjs_read_header,
115 .extensions = "pjs",
116 .read_packet = ff_subtitles_read_packet,
117 .read_seek2 = ff_subtitles_read_seek,
118 .read_close = ff_subtitles_read_close,
119 };
120