1/* 2 * RAW DNxHD (SMPTE VC-3) demuxer 3 * Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@gmail.com> 4 * Copyright (c) 2009 Reimar D��ffinger <Reimar.Doeffinger@gmx.de> 5 * 6 * This file is part of Libav. 7 * 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. 12 * 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. 17 * 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 21 */ 22 23#include "libavutil/intreadwrite.h" 24#include "avformat.h" 25#include "rawdec.h" 26 27static 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 < 1237 || compression_id > 1253) 41 return 0; 42 return AVPROBE_SCORE_MAX; 43} 44 45FF_DEF_RAWVIDEO_DEMUXER(dnxhd, "raw DNxHD (SMPTE VC-3)", dnxhd_probe, NULL, CODEC_ID_DNXHD) 46