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1 | /* |
2 | * copyright (c) 2006 Mans Rullgard | |
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_ADLER32_H | |
22 | #define AVUTIL_ADLER32_H | |
23 | ||
24 | #include <stdint.h> | |
25 | #include "attributes.h" | |
26 | ||
27 | /** | |
28 | * @file | |
29 | * Public header for libavutil Adler32 hasher | |
30 | * | |
31 | * @defgroup lavu_adler32 Adler32 | |
32 | * @ingroup lavu_crypto | |
33 | * @{ | |
34 | */ | |
35 | ||
36 | /** | |
37 | * Calculate the Adler32 checksum of a buffer. | |
38 | * | |
39 | * Passing the return value to a subsequent av_adler32_update() call | |
40 | * allows the checksum of multiple buffers to be calculated as though | |
41 | * they were concatenated. | |
42 | * | |
43 | * @param adler initial checksum value | |
44 | * @param buf pointer to input buffer | |
45 | * @param len size of input buffer | |
46 | * @return updated checksum | |
47 | */ | |
48 | unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf, | |
49 | unsigned int len) av_pure; | |
50 | ||
51 | /** | |
52 | * @} | |
53 | */ | |
54 | ||
55 | #endif /* AVUTIL_ADLER32_H */ |