[deb_ffmpeg.git] / ffmpeg / libavformat / a64.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,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* a64 muxer
	3	* Copyright (c) 2009 Tobias Bindhammer
	4	*
	5	* This file is part of FFmpeg.
	6	*
	7	* FFmpeg is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU Lesser General Public
	9	* License as published by the Free Software Foundation; either
	10	* version 2.1 of the License, or (at your option) any later version.
	11	*
	12	* FFmpeg is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* Lesser General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public
	18	* License along with FFmpeg; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	20	*/
	21
	22	#include "libavcodec/avcodec.h"
	23	#include "libavcodec/bytestream.h"
	24	#include "avformat.h"
	25	#include "rawenc.h"
	26
	27	static int a64_write_header(AVFormatContext *s)
	28	{
	29	AVCodecContext *avctx = s->streams[0]->codec;
	30	uint8_t header[5] = {
	31	0x00, //load
	32	0x40, //address
	33	0x00, //mode
	34	0x00, //charset_lifetime (multi only)
	35	0x00 //fps in 50/fps;
	36	};
	37
	38	if (avctx->extradata_size < 4) {
	39	av_log(s, AV_LOG_ERROR, "Missing extradata\n");
	40	return AVERROR_INVALIDDATA;
	41	}
	42
	43	switch (avctx->codec_id) {
	44	case AV_CODEC_ID_A64_MULTI:
	45	header[2] = 0x00;
	46	header[3] = AV_RB32(avctx->extradata+0);
	47	header[4] = 2;
	48	break;
	49	case AV_CODEC_ID_A64_MULTI5:
	50	header[2] = 0x01;
	51	header[3] = AV_RB32(avctx->extradata+0);
	52	header[4] = 3;
	53	break;
	54	default:
	55	return AVERROR_INVALIDDATA;
	56	}
	57	avio_write(s->pb, header, 2);
	58	return 0;
	59	}
	60
	61	AVOutputFormat ff_a64_muxer = {
	62	.name = "a64",
	63	.long_name = NULL_IF_CONFIG_SMALL("a64 - video for Commodore 64"),
	64	.extensions = "a64, A64",
65	.video_codec = AV_CODEC_ID_A64_MULTI,
66	.write_header = a64_write_header,
67	.write_packet = ff_raw_write_packet,
68	};