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git-subtree-dir: submodules/ffmpeg git-subtree-mainline: 8f5a4f7dc119599d326c72d9a6115973e825491b git-subtree-split: 53fc3dcb6022f35015afd2605ead32bfd7417144
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/*
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* RAW Dirac demuxer
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* Copyright (c) 2007 Marco Gerards <marco@gnu.org>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "rawdec.h"
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static int dirac_probe(AVProbeData *p)
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{
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unsigned size;
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if (AV_RL32(p->buf) != MKTAG('B', 'B', 'C', 'D'))
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return 0;
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size = AV_RB32(p->buf+5);
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if (size < 13)
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return 0;
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if (size + 13LL > p->buf_size)
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return AVPROBE_SCORE_MAX / 4;
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if (AV_RL32(p->buf + size) != MKTAG('B', 'B', 'C', 'D'))
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return 0;
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return AVPROBE_SCORE_MAX;
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}
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FF_DEF_RAWVIDEO_DEMUXER(dirac, "raw Dirac", dirac_probe, NULL, AV_CODEC_ID_DIRAC)
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