aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* 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 <inttypes.h>
#include "avformat.h"
#include "internal.h"
static int microdvd_write_header(struct AVFormatContext *s)
{
AVCodecParameters *par = s->streams[0]->codecpar;
AVRational framerate = s->streams[0]->avg_frame_rate;
if (s->nb_streams != 1 || par->codec_id != AV_CODEC_ID_MICRODVD) {
av_log(s, AV_LOG_ERROR, "Exactly one MicroDVD stream is needed.\n");
return -1;
}
if (par->extradata && par->extradata_size > 0) {
avio_write(s->pb, "{DEFAULT}{}", 11);
avio_write(s->pb, par->extradata, par->extradata_size);
avio_flush(s->pb);
}
avpriv_set_pts_info(s->streams[0], 64, framerate.num, framerate.den);
return 0;
}
static int microdvd_write_packet(AVFormatContext *avf, AVPacket *pkt)
{
avio_printf(avf->pb, "{%"PRId64"}", pkt->pts);
if (pkt->duration < 0)
avio_write(avf->pb, "{}", 2);
else
avio_printf(avf->pb, "{%"PRId64"}", pkt->pts + pkt->duration);
avio_write(avf->pb, pkt->data, pkt->size);
avio_write(avf->pb, "\n", 1);
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 = microdvd_write_packet,
.flags = AVFMT_NOTIMESTAMPS,
.subtitle_codec = AV_CODEC_ID_MICRODVD,
};
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