/* * 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 "libavutil/intreadwrite.h"#include "libavcodec/codec_id.h"#include "libavcodec/codec_par.h"#include "avformat.h"#include "mux.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;} const FFOutputFormat ff_a64_muxer = {    .p.name         = "a64",    .p.long_name    = NULL_IF_CONFIG_SMALL("a64 - video for Commodore 64"),    .p.extensions   = "a64, A64",    .p.video_codec  = AV_CODEC_ID_A64_MULTI,    .p.audio_codec    = AV_CODEC_ID_NONE,    .p.subtitle_codec = AV_CODEC_ID_NONE,    .flags_internal   = FF_OFMT_FLAG_MAX_ONE_OF_EACH,    .write_header   = a64_write_header,    .write_packet   = ff_raw_write_packet,};