FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/aqtitledec.c
Date: 2024-11-20 23:03:26
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 "demux.h"
31 #include "internal.h"
32 #include "subtitles.h"
33 #include "libavutil/opt.h"
34
35 typedef struct {
36 const AVClass *class;
37 FFDemuxSubtitlesQueue q;
38 AVRational frame_rate;
39 } AQTitleContext;
40
41 7186 static int aqt_probe(const AVProbeData *p)
42 {
43 int frame;
44 7186 const char *ptr = p->buf;
45
46
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 7186 if (sscanf(ptr, "-->> %d", &frame) == 1)
47 1 return AVPROBE_SCORE_EXTENSION;
48 7185 return 0;
49 }
50
51 1 static int aqt_read_header(AVFormatContext *s)
52 {
53 1 AQTitleContext *aqt = s->priv_data;
54 1 AVStream *st = avformat_new_stream(s, NULL);
55 1 int new_event = 1;
56 1 int64_t pos = 0, frame = AV_NOPTS_VALUE;
57 1 AVPacket *sub = NULL;
58
59
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 1 if (!st)
60 ✗ return AVERROR(ENOMEM);
61 1 avpriv_set_pts_info(st, 64, aqt->frame_rate.den, aqt->frame_rate.num);
62 1 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
63 1 st->codecpar->codec_id = AV_CODEC_ID_TEXT;
64
65
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 159 while (!avio_feof(s->pb)) {
66 char line[4096];
67 159 int len = ff_get_line(s->pb, line, sizeof(line));
68
69
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 159 if (!len)
70 1 break;
71
72 158 line[strcspn(line, "\r\n")] = 0;
73
74
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 158 if (sscanf(line, "-->> %"SCNd64, &frame) == 1) {
75 53 new_event = 1;
76 53 pos = avio_tell(s->pb);
77
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 53 if (sub) {
78
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 33 if (frame >= sub->pts && (uint64_t)frame - sub->pts < INT64_MAX)
79 33 sub->duration = frame - sub->pts;
80 33 sub = NULL;
81 }
82
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 105 } else if (*line) {
83
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 46 if (!new_event) {
84 13 sub = ff_subtitles_queue_insert(&aqt->q, "\n", 1, 1);
85
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 13 if (!sub)
86 ✗ return AVERROR(ENOMEM);
87 }
88 46 sub = ff_subtitles_queue_insert(&aqt->q, line, strlen(line), !new_event);
89
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 46 if (!sub)
90 ✗ return AVERROR(ENOMEM);
91
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 46 if (new_event) {
92 33 sub->pts = frame;
93 33 sub->duration = -1;
94 33 sub->pos = pos;
95 }
96 46 new_event = 0;
97 }
98 }
99
100 1 ff_subtitles_queue_finalize(s, &aqt->q);
101 1 return 0;
102 }
103
104 34 static int aqt_read_packet(AVFormatContext *s, AVPacket *pkt)
105 {
106 34 AQTitleContext *aqt = s->priv_data;
107 34 return ff_subtitles_queue_read_packet(&aqt->q, pkt);
108 }
109
110 ✗ static int aqt_read_seek(AVFormatContext *s, int stream_index,
111 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
112 {
113 ✗ AQTitleContext *aqt = s->priv_data;
114 ✗ return ff_subtitles_queue_seek(&aqt->q, s, stream_index,
115 min_ts, ts, max_ts, flags);
116 }
117
118 1 static int aqt_read_close(AVFormatContext *s)
119 {
120 1 AQTitleContext *aqt = s->priv_data;
121 1 ff_subtitles_queue_clean(&aqt->q);
122 1 return 0;
123 }
124
125 #define OFFSET(x) offsetof(AQTitleContext, x)
126 #define SD AV_OPT_FLAG_SUBTITLE_PARAM|AV_OPT_FLAG_DECODING_PARAM
127 static const AVOption aqt_options[] = {
128 { "subfps", "set the movie frame rate", OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, {.dbl=25}, 0, INT_MAX, SD },
129 { NULL }
130 };
131
132 static const AVClass aqt_class = {
133 .class_name = "aqtdec",
134 .item_name = av_default_item_name,
135 .option = aqt_options,
136 .version = LIBAVUTIL_VERSION_INT,
137 };
138
139 const FFInputFormat ff_aqtitle_demuxer = {
140 .p.name = "aqtitle",
141 .p.long_name = NULL_IF_CONFIG_SMALL("AQTitle subtitles"),
142 .p.extensions = "aqt",
143 .p.priv_class = &aqt_class,
144 .priv_data_size = sizeof(AQTitleContext),
145 .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
146 .read_probe = aqt_probe,
147 .read_header = aqt_read_header,
148 .read_packet = aqt_read_packet,
149 .read_seek2 = aqt_read_seek,
150 .read_close = aqt_read_close,
151 };
152