blob: 04f475b645394690b0fac6818ef313d3458a3650
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 | |
26 | static int microdvd_write_header(struct AVFormatContext *s) |
27 | { |
28 | AVCodecParameters *par = s->streams[0]->codecpar; |
29 | AVRational framerate = s->streams[0]->avg_frame_rate; |
30 | |
31 | if (s->nb_streams != 1 || par->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 (par->extradata && par->extradata_size > 0) { |
37 | avio_write(s->pb, "{DEFAULT}{}", 11); |
38 | avio_write(s->pb, par->extradata, par->extradata_size); |
39 | avio_flush(s->pb); |
40 | } |
41 | |
42 | avpriv_set_pts_info(s->streams[0], 64, framerate.num, framerate.den); |
43 | return 0; |
44 | } |
45 | |
46 | static 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 | |
58 | AVOutputFormat 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 |