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2134
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1 /*
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2 * Copyright (c) 2009 Baptiste Coudurier <baptiste.coudurier@gmail.com>
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3 *
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4 * This file is part of FFmpeg.
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5 *
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6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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_RANDOM_SEED_H
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22 #define AVUTIL_RANDOM_SEED_H
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23
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24 #include <stdint.h>
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25 /**
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26 * @addtogroup lavu_crypto
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27 * @{
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28 */
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29
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30 /**
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31 * Get a seed to use in conjunction with random functions.
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32 * This function tries to provide a good seed at a best effort bases.
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33 * Its possible to call this function multiple times if more bits are needed.
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34 * It can be quite slow, which is why it should only be used as seed for a faster
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35 * PRNG. The quality of the seed depends on the platform.
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36 */
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37 uint32_t av_get_random_seed(void);
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38
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39 /**
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40 * @}
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41 */
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42
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43 #endif /* AVUTIL_RANDOM_SEED_H */
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