aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* a64 muxer
* Copyright (c) 2009 Tobias Bindhammer
*
* 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 "libavcodec/avcodec.h"
#include "libavcodec/bytestream.h"
#include "avformat.h"
#include "rawenc.h"
static int a64_write_header(AVFormatContext *s)
{
AVCodecParameters *par = s->streams[0]->codecpar;
uint8_t header[5] = {
0x00, //load
0x40, //address
0x00, //mode
0x00, //charset_lifetime (multi only)
0x00 //fps in 50/fps;
};
if (par->extradata_size < 4) {
av_log(s, AV_LOG_ERROR, "Missing extradata\n");
return AVERROR_INVALIDDATA;
}
switch (par->codec_id) {
case AV_CODEC_ID_A64_MULTI:
header[2] = 0x00;
header[3] = AV_RB32(par->extradata+0);
header[4] = 2;
break;
case AV_CODEC_ID_A64_MULTI5:
header[2] = 0x01;
header[3] = AV_RB32(par->extradata+0);
header[4] = 3;
break;
default:
return AVERROR_INVALIDDATA;
}
avio_write(s->pb, header, 2);
return 0;
}
AVOutputFormat ff_a64_muxer = {
.name = "a64",
.long_name = NULL_IF_CONFIG_SMALL("a64 - video for Commodore 64"),
.extensions = "a64, A64",
.video_codec = AV_CODEC_ID_A64_MULTI,
.write_header = a64_write_header,
.write_packet = ff_raw_write_packet,
};
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