FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/aqtitledec.c
Date: 2024-02-16 17:37:06
Exec Total Coverage
Lines: 47 53 88.7%
Functions: 4 5 80.0%
Branches: 20 26 76.9%

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 * AQTitle subtitles format demuxer
24 *
25 * @see http://web.archive.org/web/20070210095721/http://www.volny.cz/aberka/czech/aqt.html
26 * @see https://trac.annodex.net/wiki/AQTitle
27 */
28
29 #include "avformat.h"
30 #include "internal.h"
31 #include "subtitles.h"
32 #include "libavutil/opt.h"
33
34 typedef struct {
35 const AVClass *class;
36 FFDemuxSubtitlesQueue q;
37 AVRational frame_rate;
38 } AQTitleContext;
39
40 7023 static int aqt_probe(const AVProbeData *p)
41 {
42 int frame;
43 7023 const char *ptr = p->buf;
44
45
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7023 if (sscanf(ptr, "-->> %d", &frame) == 1)
46 1 return AVPROBE_SCORE_EXTENSION;
47 7022 return 0;
48 }
49
50 1 static int aqt_read_header(AVFormatContext *s)
51 {
52 1 AQTitleContext *aqt = s->priv_data;
53 1 AVStream *st = avformat_new_stream(s, NULL);
54 1 int new_event = 1;
55 1 int64_t pos = 0, frame = AV_NOPTS_VALUE;
56 1 AVPacket *sub = NULL;
57
58
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1 if (!st)
59 return AVERROR(ENOMEM);
60 1 avpriv_set_pts_info(st, 64, aqt->frame_rate.den, aqt->frame_rate.num);
61 1 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
62 1 st->codecpar->codec_id = AV_CODEC_ID_TEXT;
63
64
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159 while (!avio_feof(s->pb)) {
65 char line[4096];
66 159 int len = ff_get_line(s->pb, line, sizeof(line));
67
68
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159 if (!len)
69 1 break;
70
71 158 line[strcspn(line, "\r\n")] = 0;
72
73
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158 if (sscanf(line, "-->> %"SCNd64, &frame) == 1) {
74 53 new_event = 1;
75 53 pos = avio_tell(s->pb);
76
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53 if (sub) {
77
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33 if (frame >= sub->pts && (uint64_t)frame - sub->pts < INT64_MAX)
78 33 sub->duration = frame - sub->pts;
79 33 sub = NULL;
80 }
81
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105 } else if (*line) {
82
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46 if (!new_event) {
83 13 sub = ff_subtitles_queue_insert(&aqt->q, "\n", 1, 1);
84
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13 if (!sub)
85 return AVERROR(ENOMEM);
86 }
87 46 sub = ff_subtitles_queue_insert(&aqt->q, line, strlen(line), !new_event);
88
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46 if (!sub)
89 return AVERROR(ENOMEM);
90
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46 if (new_event) {
91 33 sub->pts = frame;
92 33 sub->duration = -1;
93 33 sub->pos = pos;
94 }
95 46 new_event = 0;
96 }
97 }
98
99 1 ff_subtitles_queue_finalize(s, &aqt->q);
100 1 return 0;
101 }
102
103 34 static int aqt_read_packet(AVFormatContext *s, AVPacket *pkt)
104 {
105 34 AQTitleContext *aqt = s->priv_data;
106 34 return ff_subtitles_queue_read_packet(&aqt->q, pkt);
107 }
108
109 static int aqt_read_seek(AVFormatContext *s, int stream_index,
110 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
111 {
112 AQTitleContext *aqt = s->priv_data;
113 return ff_subtitles_queue_seek(&aqt->q, s, stream_index,
114 min_ts, ts, max_ts, flags);
115 }
116
117 1 static int aqt_read_close(AVFormatContext *s)
118 {
119 1 AQTitleContext *aqt = s->priv_data;
120 1 ff_subtitles_queue_clean(&aqt->q);
121 1 return 0;
122 }
123
124 #define OFFSET(x) offsetof(AQTitleContext, x)
125 #define SD AV_OPT_FLAG_SUBTITLE_PARAM|AV_OPT_FLAG_DECODING_PARAM
126 static const AVOption aqt_options[] = {
127 { "subfps", "set the movie frame rate", OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, {.dbl=25}, 0, INT_MAX, SD },
128 { NULL }
129 };
130
131 static const AVClass aqt_class = {
132 .class_name = "aqtdec",
133 .item_name = av_default_item_name,
134 .option = aqt_options,
135 .version = LIBAVUTIL_VERSION_INT,
136 };
137
138 const AVInputFormat ff_aqtitle_demuxer = {
139 .name = "aqtitle",
140 .long_name = NULL_IF_CONFIG_SMALL("AQTitle subtitles"),
141 .priv_data_size = sizeof(AQTitleContext),
142 .flags_internal = FF_FMT_INIT_CLEANUP,
143 .read_probe = aqt_probe,
144 .read_header = aqt_read_header,
145 .read_packet = aqt_read_packet,
146 .read_seek2 = aqt_read_seek,
147 .read_close = aqt_read_close,
148 .extensions = "aqt",
149 .priv_class = &aqt_class,
150 };
151