69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/*
|
|
* 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)
|
|
{
|
|
AVCodecContext *avctx = s->streams[0]->codec;
|
|
uint8_t header[5] = {
|
|
0x00, //load
|
|
0x40, //address
|
|
0x00, //mode
|
|
0x00, //charset_lifetime (multi only)
|
|
0x00 //fps in 50/fps;
|
|
};
|
|
|
|
if (avctx->extradata_size < 4) {
|
|
av_log(s, AV_LOG_ERROR, "Missing extradata\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
switch (avctx->codec_id) {
|
|
case AV_CODEC_ID_A64_MULTI:
|
|
header[2] = 0x00;
|
|
header[3] = AV_RB32(avctx->extradata+0);
|
|
header[4] = 2;
|
|
break;
|
|
case AV_CODEC_ID_A64_MULTI5:
|
|
header[2] = 0x01;
|
|
header[3] = AV_RB32(avctx->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,
|
|
};
|