aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* id RoQ (.roq) File muxer
* Copyright (c) 2007 Vitor Sessak
*
* 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 roq_write_header(struct AVFormatContext *s)
{
uint8_t header[] = {
0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, /* fps: */ 0x1E, 0x00
};
int n;
// set the actual fps
for(n=0;n<s->nb_streams;n++) {
if (s->streams[n]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
unsigned int fps;
if (s->streams[n]->avg_frame_rate.den != 1) {
av_log(s, AV_LOG_ERROR, "Frame rate must be integer\n");
return AVERROR(EINVAL);
}
if ((fps=s->streams[n]->avg_frame_rate.num) > 255) {
av_log(s, AV_LOG_ERROR, "Frame rate may not exceed 255fps\n");
return AVERROR(EINVAL);
}
if (fps != 30) {
av_log(s, AV_LOG_WARNING, "For vintage compatibility fps must be 30\n");
}
header[6] = fps;
break;
}
}
avio_write(s->pb, header, 8);
avio_flush(s->pb);
return 0;
}
AVOutputFormat ff_roq_muxer = {
.name = "roq",
.long_name = NULL_IF_CONFIG_SMALL("raw id RoQ"),
.extensions = "roq",
.audio_codec = AV_CODEC_ID_ROQ_DPCM,
.video_codec = AV_CODEC_ID_ROQ,
.write_header = roq_write_header,
.write_packet = ff_raw_write_packet,
};
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