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55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/*
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* RAW DNxHD (SMPTE VC-3) demuxer
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* Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@gmail.com>
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* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
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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 dnxhd_probe(AVProbeData *p)
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{
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static const uint8_t header[] = {0x00,0x00,0x02,0x80,0x01};
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int w, h, compression_id;
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if (p->buf_size < 0x2c)
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return 0;
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if (memcmp(p->buf, header, 5))
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return 0;
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h = AV_RB16(p->buf + 0x18);
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w = AV_RB16(p->buf + 0x1a);
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if (!w || !h)
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return 0;
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compression_id = AV_RB32(p->buf + 0x28);
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if (compression_id < 1237 || compression_id > 1253)
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return 0;
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return AVPROBE_SCORE_MAX;
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}
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AVInputFormat dnxhd_demuxer = {
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"dnxhd",
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NULL_IF_CONFIG_SMALL("raw DNxHD (SMPTE VC-3)"),
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0,
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dnxhd_probe,
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ff_raw_video_read_header,
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ff_raw_read_partial_packet,
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.flags= AVFMT_GENERIC_INDEX,
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.value = CODEC_ID_DNXHD,
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};
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