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comparison lib/libavutil/adler32.h @ 2134:992d2e6f907d

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preparation for libavcodec
author zipi
date Tue, 31 Dec 2013 14:52:14 +0000
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2133:e378232bfd36 2134:992d2e6f907d
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 * @ingroup lavu_crypto
29 * Calculate the Adler32 checksum of a buffer.
30 *
31 * Passing the return value to a subsequent av_adler32_update() call
32 * allows the checksum of multiple buffers to be calculated as though
33 * they were concatenated.
34 *
35 * @param adler initial checksum value
36 * @param buf pointer to input buffer
37 * @param len size of input buffer
38 * @return updated checksum
39 */
40 unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf,
41 unsigned int len) av_pure;
42
43 #endif /* AVUTIL_ADLER32_H */