ffmpeg / libavformat / dnxhddec.c @ 2912e87a
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| 1 | 66e35c5f | Aurelien Jacobs | /*
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| 2 | * RAW DNxHD (SMPTE VC-3) demuxer
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| 3 | * Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@gmail.com>
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| 4 | * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
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| 5 | *
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| 6 | 2912e87a | Mans Rullgard | * This file is part of Libav.
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| 7 | 66e35c5f | Aurelien Jacobs | *
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| 8 | 2912e87a | Mans Rullgard | * Libav is free software; you can redistribute it and/or
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| 9 | 66e35c5f | Aurelien Jacobs | * 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 | 2912e87a | Mans Rullgard | * Libav is distributed in the hope that it will be useful,
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| 14 | 66e35c5f | Aurelien Jacobs | * 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 | 2912e87a | Mans Rullgard | * License along with Libav; if not, write to the Free Software
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| 20 | 66e35c5f | Aurelien Jacobs | * 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 | 4ca31edc | Aurelien Jacobs | #include "rawdec.h" |
| 26 | 66e35c5f | Aurelien Jacobs | |
| 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 < 1237 || compression_id > 1253) |
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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 | c6610a21 | Diego Elio Pettenò | AVInputFormat ff_dnxhd_demuxer = {
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| 46 | 66e35c5f | Aurelien Jacobs | "dnxhd",
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| 47 | NULL_IF_CONFIG_SMALL("raw DNxHD (SMPTE VC-3)"),
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| 48 | 0,
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| 49 | dnxhd_probe, |
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| 50 | ff_raw_video_read_header, |
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| 51 | ff_raw_read_partial_packet, |
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| 52 | .flags= AVFMT_GENERIC_INDEX, |
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| 53 | .value = CODEC_ID_DNXHD, |
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| 54 | }; |