aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* RAW Dirac demuxer
* Copyright (c) 2007 Marco Gerards <marco@gnu.org>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "rawdec.h"
static int dirac_probe(const AVProbeData *p)
{
unsigned size;
if (AV_RL32(p->buf) != MKTAG('B', 'B', 'C', 'D'))
return 0;
size = AV_RB32(p->buf+5);
if (size < 13)
return 0;
if (size + 13LL > p->buf_size)
return AVPROBE_SCORE_MAX / 4;
if (AV_RL32(p->buf + size) != MKTAG('B', 'B', 'C', 'D'))
return 0;
return AVPROBE_SCORE_MAX;
}
FF_DEF_RAWVIDEO_DEMUXER(dirac, "raw Dirac", dirac_probe, NULL, AV_CODEC_ID_DIRAC)
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