blob: e061ba5e8eea22df5ca20c8d4bf11e504a837672
1 | /* |
2 | * RAW Dirac demuxer |
3 | * Copyright (c) 2007 Marco Gerards <marco@gnu.org> |
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 "libavutil/intreadwrite.h" |
23 | #include "avformat.h" |
24 | #include "rawdec.h" |
25 | |
26 | static int dirac_probe(AVProbeData *p) |
27 | { |
28 | unsigned size; |
29 | if (AV_RL32(p->buf) != MKTAG('B', 'B', 'C', 'D')) |
30 | return 0; |
31 | |
32 | size = AV_RB32(p->buf+5); |
33 | if (size < 13) |
34 | return 0; |
35 | if (size + 13LL > p->buf_size) |
36 | return AVPROBE_SCORE_MAX / 4; |
37 | if (AV_RL32(p->buf + size) != MKTAG('B', 'B', 'C', 'D')) |
38 | return 0; |
39 | |
40 | return AVPROBE_SCORE_MAX; |
41 | } |
42 | |
43 | FF_DEF_RAWVIDEO_DEMUXER(dirac, "raw Dirac", dirac_probe, NULL, AV_CODEC_ID_DIRAC) |
44 |