1 /* |
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2 * copyright (c) 2006 Mans Rullgard |
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3 * |
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4 * This file is part of Libav. |
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5 * |
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6 * Libav is free software; you can redistribute it and/or |
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7 * modify it under the terms of the GNU Lesser General Public |
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8 * License as published by the Free Software Foundation; either |
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9 * version 2.1 of the License, or (at your option) any later version. |
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10 * |
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11 * Libav is distributed in the hope that it will be useful, |
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 * Lesser General Public License for more details. |
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15 * |
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16 * You should have received a copy of the GNU Lesser General Public |
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17 * License along with Libav; if not, write to the Free Software |
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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19 */ |
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20 |
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21 #ifndef AVUTIL_ADLER32_H |
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22 #define AVUTIL_ADLER32_H |
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23 |
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24 #include <stdint.h> |
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25 #include "attributes.h" |
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26 |
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27 /** |
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28 * @ingroup lavu_crypto |
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29 * Calculate the Adler32 checksum of a buffer. |
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30 * |
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31 * Passing the return value to a subsequent av_adler32_update() call |
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32 * allows the checksum of multiple buffers to be calculated as though |
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33 * they were concatenated. |
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34 * |
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35 * @param adler initial checksum value |
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36 * @param buf pointer to input buffer |
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37 * @param len size of input buffer |
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38 * @return updated checksum |
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39 */ |
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40 unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf, |
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41 unsigned int len) av_pure; |
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42 |
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43 #endif /* AVUTIL_ADLER32_H */ |
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