1 /* 2 * Copyright (c) 2017, Alliance for Open Media. All rights reserved 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #ifndef AOM_AV1_ENCODER_RANDOM_H_ 13 #define AOM_AV1_ENCODER_RANDOM_H_ 14 15 #ifdef __cplusplus 16 extern "C" { 17 #endif 18 19 // Generate a random number in the range [0, 32768). lcg_rand16(unsigned int * state)20static INLINE unsigned int lcg_rand16(unsigned int *state) { 21 *state = (unsigned int)(*state * 1103515245ULL + 12345); 22 return *state / 65536 % 32768; 23 } 24 25 #ifdef __cplusplus 26 } // extern "C" 27 #endif 28 29 #endif // AOM_AV1_ENCODER_RANDOM_H_ 30