1/*
2 * MicroDVD subtitle muxer
3 * Copyright (c) 2010  Aurelien Jacobs <aurel@gnuage.org>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include <inttypes.h>
23#include "avformat.h"
24#include "internal.h"
25
26static int microdvd_write_header(struct AVFormatContext *s)
27{
28    AVCodecContext *avctx = s->streams[0]->codec;
29    AVRational tb = avctx->time_base;
30
31    if (s->nb_streams != 1 || avctx->codec_id != AV_CODEC_ID_MICRODVD) {
32        av_log(s, AV_LOG_ERROR, "Exactly one MicroDVD stream is needed.\n");
33        return -1;
34    }
35
36    if (avctx->extradata && avctx->extradata_size > 0) {
37        avio_write(s->pb, "{DEFAULT}{}", 11);
38        avio_write(s->pb, avctx->extradata, avctx->extradata_size);
39        avio_flush(s->pb);
40    }
41
42    avpriv_set_pts_info(s->streams[0], 64, tb.num, tb.den);
43    return 0;
44}
45
46static int microdvd_write_packet(AVFormatContext *avf, AVPacket *pkt)
47{
48    avio_printf(avf->pb, "{%"PRId64"}", pkt->pts);
49    if (pkt->duration < 0)
50        avio_write(avf->pb, "{}", 2);
51    else
52        avio_printf(avf->pb, "{%"PRId64"}", pkt->pts + pkt->duration);
53    avio_write(avf->pb, pkt->data, pkt->size);
54    avio_write(avf->pb, "\n", 1);
55    return 0;
56}
57
58AVOutputFormat ff_microdvd_muxer = {
59    .name           = "microdvd",
60    .long_name      = NULL_IF_CONFIG_SMALL("MicroDVD subtitle format"),
61    .mime_type      = "text/x-microdvd",
62    .extensions     = "sub",
63    .write_header   = microdvd_write_header,
64    .write_packet   = microdvd_write_packet,
65    .flags          = AVFMT_NOTIMESTAMPS,
66    .subtitle_codec = AV_CODEC_ID_MICRODVD,
67};
68