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2ba45a60 DM |
1 | /* |
2 | * RAW DNxHD (SMPTE VC-3) demuxer | |
3 | * Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@gmail.com> | |
4 | * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de> | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include "libavutil/intreadwrite.h" | |
24 | #include "avformat.h" | |
25 | #include "rawdec.h" | |
26 | ||
27 | static int dnxhd_probe(AVProbeData *p) | |
28 | { | |
29 | static const uint8_t header[] = {0x00,0x00,0x02,0x80,0x01}; | |
30 | int w, h, compression_id; | |
31 | if (p->buf_size < 0x2c) | |
32 | return 0; | |
33 | if (memcmp(p->buf, header, 5)) | |
34 | return 0; | |
35 | h = AV_RB16(p->buf + 0x18); | |
36 | w = AV_RB16(p->buf + 0x1a); | |
37 | if (!w || !h) | |
38 | return 0; | |
39 | compression_id = AV_RB32(p->buf + 0x28); | |
40 | if (compression_id < 1235 || compression_id > 1253) | |
41 | return 0; | |
42 | return AVPROBE_SCORE_MAX; | |
43 | } | |
44 | ||
45 | FF_DEF_RAWVIDEO_DEMUXER(dnxhd, "raw DNxHD (SMPTE VC-3)", dnxhd_probe, NULL, AV_CODEC_ID_DNXHD) |