FFmpeg/libavformat/microdvdenc.c

/*
 * MicroDVD subtitle muxer
 * Copyright (c) 2010  Aurelien Jacobs <aurel@gnuage.org>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "avformat.h"
#include "rawenc.h"

static int microdvd_write_header(struct AVFormatContext *s)
{
    AVCodecContext *avctx = s->streams[0]->codec;

    if (s->nb_streams != 1 || avctx->codec_id != CODEC_ID_MICRODVD) {
        av_log(s, AV_LOG_ERROR, "Exactly one MicroDVD stream is needed.\n");
        return -1;
    }

    if (avctx->extradata && avctx->extradata_size > 0) {
        avio_write(s->pb, "{DEFAULT}{}", 11);
        avio_write(s->pb, avctx->extradata, avctx->extradata_size);
        avio_flush(s->pb);
    }
    return 0;
}

AVOutputFormat ff_microdvd_muxer = {
    .name           = "microdvd",
    .long_name      = NULL_IF_CONFIG_SMALL("MicroDVD subtitle format"),
    .mime_type      = "text/x-microdvd",
    .extensions     = "sub",
    .write_header   = microdvd_write_header,
    .write_packet   = ff_raw_write_packet,
    .flags          = AVFMT_NOTIMESTAMPS,
    .subtitle_codec = CODEC_ID_MICRODVD,
};