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68 lines
2.0 KiB
68 lines
2.0 KiB
/* |
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* a64 muxer |
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* Copyright (c) 2009 Tobias Bindhammer |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavcodec/avcodec.h" |
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#include "libavcodec/bytestream.h" |
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#include "avformat.h" |
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#include "rawenc.h" |
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static int a64_write_header(AVFormatContext *s) |
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{ |
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AVCodecContext *avctx = s->streams[0]->codec; |
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uint8_t header[5] = { |
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0x00, //load |
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0x40, //address |
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0x00, //mode |
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0x00, //charset_lifetime (multi only) |
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0x00 //fps in 50/fps; |
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}; |
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if (avctx->extradata_size < 4) { |
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av_log(s, AV_LOG_ERROR, "Missing extradata\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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switch (avctx->codec->id) { |
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case AV_CODEC_ID_A64_MULTI: |
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header[2] = 0x00; |
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header[3] = AV_RB32(avctx->extradata+0); |
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header[4] = 2; |
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break; |
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case AV_CODEC_ID_A64_MULTI5: |
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header[2] = 0x01; |
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header[3] = AV_RB32(avctx->extradata+0); |
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header[4] = 3; |
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break; |
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default: |
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return AVERROR_INVALIDDATA; |
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} |
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avio_write(s->pb, header, 2); |
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return 0; |
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} |
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AVOutputFormat ff_a64_muxer = { |
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.name = "a64", |
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.long_name = NULL_IF_CONFIG_SMALL("a64 - video for Commodore 64"), |
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.extensions = "a64, A64", |
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.video_codec = AV_CODEC_ID_A64_MULTI, |
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.write_header = a64_write_header, |
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.write_packet = ff_raw_write_packet, |
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};
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