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54 lines
1.7 KiB
54 lines
1.7 KiB
/* |
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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 Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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 ff_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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