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 26static 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 43FF_DEF_RAWVIDEO_DEMUXER(dirac, "raw Dirac", dirac_probe, NULL, AV_CODEC_ID_DIRAC) 44