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2ba45a60 DM |
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) |