| 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 | }; |