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>
6 * This file is part of Libav.
8 * Libav 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.
13 * Libav 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.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavutil/intreadwrite.h"
27 static int dnxhd_probe(AVProbeData *p)
29 static const uint8_t header[] = {0x00,0x00,0x02,0x80,0x01};
30 int w, h, compression_id;
31 if (p->buf_size < 0x2c)
33 if (memcmp(p->buf, header, 5))
35 h = AV_RB16(p->buf + 0x18);
36 w = AV_RB16(p->buf + 0x1a);
39 compression_id = AV_RB32(p->buf + 0x28);
40 if (compression_id < 1237 || compression_id > 1253)
42 return AVPROBE_SCORE_MAX;
45 FF_DEF_RAWVIDEO_DEMUXER(dnxhd, "raw DNxHD (SMPTE VC-3)", dnxhd_probe, NULL, CODEC_ID_DNXHD)