1 /* 2 * Copyright (c) 2009 Baptiste Coudurier <baptiste.coudurier@gmail.com> 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_RANDOM_SEED_H 22 #define AVUTIL_RANDOM_SEED_H 23 24 #include <stdint.h> 25 /** 26 * @addtogroup lavu_crypto 27 * @{ 28 */ 29 30 /** 31 * Get a seed to use in conjunction with random functions. 32 * This function tries to provide a good seed at a best effort bases. 33 * Its possible to call this function multiple times if more bits are needed. 34 * It can be quite slow, which is why it should only be used as seed for a faster 35 * PRNG. The quality of the seed depends on the platform. 36 */ 37 uint32_t av_get_random_seed(void); 38 39 /** 40 * @} 41 */ 42 43 #endif /* AVUTIL_RANDOM_SEED_H */ 44