2 * Copyright (c) 2012 Clément Bœsch
4 * This file is part of FFmpeg.
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.
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.
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
23 * AQTitle subtitles format demuxer
25 * @see http://web.archive.org/web/20070210095721/http://www.volny.cz/aberka/czech/aqt.html
26 * @see https://trac.annodex.net/wiki/AQTitle
31 #include "subtitles.h"
32 #include "libavutil/opt.h"
36 FFDemuxSubtitlesQueue q;
37 AVRational frame_rate;
40 static int aqt_probe(AVProbeData *p)
43 const char *ptr = p->buf;
45 if (sscanf(ptr, "-->> %d", &frame) == 1)
46 return AVPROBE_SCORE_EXTENSION;
50 static int aqt_read_header(AVFormatContext *s)
52 AQTitleContext *aqt = s->priv_data;
53 AVStream *st = avformat_new_stream(s, NULL);
55 int64_t pos = 0, frame = AV_NOPTS_VALUE;
59 return AVERROR(ENOMEM);
60 avpriv_set_pts_info(st, 64, aqt->frame_rate.den, aqt->frame_rate.num);
61 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
62 st->codecpar->codec_id = AV_CODEC_ID_TEXT;
64 while (!avio_feof(s->pb)) {
66 int len = ff_get_line(s->pb, line, sizeof(line));
71 line[strcspn(line, "\r\n")] = 0;
73 if (sscanf(line, "-->> %"SCNd64, &frame) == 1) {
75 pos = avio_tell(s->pb);
77 sub->duration = frame - sub->pts;
82 sub = ff_subtitles_queue_insert(&aqt->q, "\n", 1, 1);
84 return AVERROR(ENOMEM);
86 sub = ff_subtitles_queue_insert(&aqt->q, line, strlen(line), !new_event);
88 return AVERROR(ENOMEM);
98 ff_subtitles_queue_finalize(s, &aqt->q);
102 static int aqt_read_packet(AVFormatContext *s, AVPacket *pkt)
104 AQTitleContext *aqt = s->priv_data;
105 return ff_subtitles_queue_read_packet(&aqt->q, pkt);
108 static int aqt_read_seek(AVFormatContext *s, int stream_index,
109 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
111 AQTitleContext *aqt = s->priv_data;
112 return ff_subtitles_queue_seek(&aqt->q, s, stream_index,
113 min_ts, ts, max_ts, flags);
116 static int aqt_read_close(AVFormatContext *s)
118 AQTitleContext *aqt = s->priv_data;
119 ff_subtitles_queue_clean(&aqt->q);
123 #define OFFSET(x) offsetof(AQTitleContext, x)
124 #define SD AV_OPT_FLAG_SUBTITLE_PARAM|AV_OPT_FLAG_DECODING_PARAM
125 static const AVOption aqt_options[] = {
126 { "subfps", "set the movie frame rate", OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, {.dbl=25}, 0, INT_MAX, SD },
130 static const AVClass aqt_class = {
131 .class_name = "aqtdec",
132 .item_name = av_default_item_name,
133 .option = aqt_options,
134 .version = LIBAVUTIL_VERSION_INT,
137 AVInputFormat ff_aqtitle_demuxer = {
139 .long_name = NULL_IF_CONFIG_SMALL("AQTitle subtitles"),
140 .priv_data_size = sizeof(AQTitleContext),
141 .read_probe = aqt_probe,
142 .read_header = aqt_read_header,
143 .read_packet = aqt_read_packet,
144 .read_seek2 = aqt_read_seek,
145 .read_close = aqt_read_close,
147 .priv_class = &aqt_class,