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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6147 | serge | 1 | /* |
| 2 | * RAW DNxHD (SMPTE VC-3) demuxer |
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| 3 | * Copyright (c) 2008 Baptiste Coudurier |
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| 4 | * Copyright (c) 2009 Reimar Döffinger |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #include "libavutil/intreadwrite.h" |
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| 24 | #include "avformat.h" |
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| 25 | #include "rawdec.h" |
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| 26 | |||
| 27 | static int dnxhd_probe(AVProbeData *p) |
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| 28 | { |
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| 29 | static const uint8_t header[] = {0x00,0x00,0x02,0x80,0x01}; |
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| 30 | int w, h, compression_id; |
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| 31 | if (p->buf_size < 0x2c) |
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| 32 | return 0; |
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| 33 | if (memcmp(p->buf, header, 5)) |
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| 34 | return 0; |
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| 35 | h = AV_RB16(p->buf + 0x18); |
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| 36 | w = AV_RB16(p->buf + 0x1a); |
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| 37 | if (!w || !h) |
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| 38 | return 0; |
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| 39 | compression_id = AV_RB32(p->buf + 0x28); |
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| 40 | if (compression_id < 1235 || compression_id > 1260) |
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| 41 | return 0; |
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| 42 | return AVPROBE_SCORE_MAX; |
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| 43 | } |
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| 44 | |||
| 45 | FF_DEF_RAWVIDEO_DEMUXER(dnxhd, "raw DNxHD (SMPTE VC-3)", dnxhd_probe, NULL, AV_CODEC_ID_DNXHD) |