aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* RAW DNxHD (SMPTE VC-3) demuxer
* Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@gmail.com>
* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
* 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"
#include "libavcodec/dnxhddata.h"
static int dnxhd_probe(const AVProbeData *p)
{
int w, h, compression_id;
if (p->buf_size < 0x2c)
return 0;
if (ff_dnxhd_parse_header_prefix(p->buf) == 0)
return 0;
h = AV_RB16(p->buf + 0x18);
w = AV_RB16(p->buf + 0x1a);
if (!w || !h)
return 0;
compression_id = AV_RB32(p->buf + 0x28);
if ((compression_id < 1235 || compression_id > 1260) &&
(compression_id < 1270 || compression_id > 1274))
return 0;
return AVPROBE_SCORE_MAX;
}
FF_DEF_RAWVIDEO_DEMUXER(dnxhd, "raw DNxHD (SMPTE VC-3)", dnxhd_probe, NULL, AV_CODEC_ID_DNXHD)
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