1/* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19/** 20 * @file 21 * Compatibility libm for table generation files 22 */ 23 24#ifndef AVUTIL_TABLEGEN_H 25#define AVUTIL_TABLEGEN_H 26 27#include <math.h> 28 29// we lack some functions on all host platforms, and we don't care about 30// performance and/or strict ISO C semantics as it's performed at build time 31static inline double ff_cbrt(double x) 32{ 33 return x < 0 ? -pow(-x, 1.0 / 3.0) : pow(x, 1.0 / 3.0); 34} 35#define cbrt ff_cbrt 36 37static inline double ff_rint(double x) 38{ 39 return x >= 0 ? floor(x + 0.5) : ceil(x - 0.5); 40} 41#define rint ff_rint 42 43static inline long long ff_llrint(double x) 44{ 45 return rint(x); 46} 47#define llrint ff_llrint 48 49static inline long ff_lrint(double x) 50{ 51 return rint(x); 52} 53#define lrint ff_lrint 54 55#endif /* AVUTIL_TABLEGEN_H */ 56