blob: 2a0489dae4c1c2764642b78baf79b39fe97f9b2a
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 | AVCodecParameters *par = s->streams[0]->codecpar; |
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 (par->extradata_size < 4) { |
39 | av_log(s, AV_LOG_ERROR, "Missing extradata\n"); |
40 | return AVERROR_INVALIDDATA; |
41 | } |
42 | |
43 | switch (par->codec_id) { |
44 | case AV_CODEC_ID_A64_MULTI: |
45 | header[2] = 0x00; |
46 | header[3] = AV_RB32(par->extradata+0); |
47 | header[4] = 2; |
48 | break; |
49 | case AV_CODEC_ID_A64_MULTI5: |
50 | header[2] = 0x01; |
51 | header[3] = AV_RB32(par->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 | }; |
69 |