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1 /* | |
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> | |
3 * | |
4 * This file is part of FFmpeg. | |
5 * | |
6 * FFmpeg is free software; you can redistribute it and/or | |
7 * modify it under the terms of the GNU Lesser General Public | |
8 * License as published by the Free Software Foundation; either | |
9 * version 2.1 of the License, or (at your option) any later version. | |
10 * | |
11 * FFmpeg is distributed in the hope that it will be useful, | |
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 * Lesser General Public License for more details. | |
15 * | |
16 * You should have received a copy of the GNU Lesser General Public | |
17 * License along with FFmpeg; if not, write to the Free Software | |
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 */ | |
20 | |
21 #ifndef AVUTIL_CRC_H | |
22 #define AVUTIL_CRC_H | |
23 | |
24 #include <stdint.h> | |
25 #include <stddef.h> | |
26 #include "common.h" | |
27 | |
28 typedef uint32_t AVCRC; | |
29 | |
30 typedef enum { | |
31 AV_CRC_8_ATM, | |
32 AV_CRC_16_ANSI, | |
33 AV_CRC_16_CCITT, | |
34 AV_CRC_32_IEEE, | |
35 AV_CRC_32_IEEE_LE, /*< reversed bitorder version of AV_CRC_32_IEEE */ | |
36 AV_CRC_MAX, /*< Not part of public API! Do not use outside libavutil
. */ | |
37 }AVCRCId; | |
38 | |
39 int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size); | |
40 const AVCRC *av_crc_get_table(AVCRCId crc_id); | |
41 uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, siz
e_t length) av_pure; | |
42 | |
43 #endif /* AVUTIL_CRC_H */ | |
44 | |
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