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 * Replacements for frequently missing libm functions 22 */ 23 24#ifndef AVUTIL_LIBM_H 25#define AVUTIL_LIBM_H 26 27#include <math.h> 28#include "config.h" 29#include "attributes.h" 30#include "intfloat.h" 31 32#if HAVE_MIPSFPU && HAVE_INLINE_ASM 33#include "libavutil/mips/libm_mips.h" 34#endif /* HAVE_MIPSFPU && HAVE_INLINE_ASM*/ 35 36#if !HAVE_ATANF 37#undef atanf 38#define atanf(x) ((float)atan(x)) 39#endif 40 41#if !HAVE_ATAN2F 42#undef atan2f 43#define atan2f(y, x) ((float)atan2(y, x)) 44#endif 45 46#if !HAVE_POWF 47#undef powf 48#define powf(x, y) ((float)pow(x, y)) 49#endif 50 51#if !HAVE_CBRT 52static av_always_inline double cbrt(double x) 53{ 54 return x < 0 ? -pow(-x, 1.0 / 3.0) : pow(x, 1.0 / 3.0); 55} 56#endif 57 58#if !HAVE_CBRTF 59static av_always_inline float cbrtf(float x) 60{ 61 return x < 0 ? -powf(-x, 1.0 / 3.0) : powf(x, 1.0 / 3.0); 62} 63#endif 64 65#if !HAVE_COSF 66#undef cosf 67#define cosf(x) ((float)cos(x)) 68#endif 69 70#if !HAVE_EXPF 71#undef expf 72#define expf(x) ((float)exp(x)) 73#endif 74 75#if !HAVE_EXP2 76#undef exp2 77#define exp2(x) exp((x) * 0.693147180559945) 78#endif /* HAVE_EXP2 */ 79 80#if !HAVE_EXP2F 81#undef exp2f 82#define exp2f(x) ((float)exp2(x)) 83#endif /* HAVE_EXP2F */ 84 85 86#if !HAVE_ISINF 87static av_always_inline av_const int isinf(float x) 88{ 89 uint32_t v = av_float2int(x); 90 if ((v & 0x7f800000) != 0x7f800000) 91 return 0; 92 return !(v & 0x007fffff); 93} 94#endif /* HAVE_ISINF */ 95 96#if !HAVE_ISNAN 97static av_always_inline av_const int isnan(float x) 98{ 99 uint32_t v = av_float2int(x); 100 if ((v & 0x7f800000) != 0x7f800000) 101 return 0; 102 return v & 0x007fffff; 103} 104#endif /* HAVE_ISNAN */ 105 106#if !HAVE_LDEXPF 107#undef ldexpf 108#define ldexpf(x, exp) ((float)ldexp(x, exp)) 109#endif 110 111#if !HAVE_LLRINT 112#undef llrint 113#define llrint(x) ((long long)rint(x)) 114#endif /* HAVE_LLRINT */ 115 116#if !HAVE_LLRINTF 117#undef llrintf 118#define llrintf(x) ((long long)rint(x)) 119#endif /* HAVE_LLRINT */ 120 121#if !HAVE_LOG2 122#undef log2 123#define log2(x) (log(x) * 1.44269504088896340736) 124#endif /* HAVE_LOG2 */ 125 126#if !HAVE_LOG2F 127#undef log2f 128#define log2f(x) ((float)log2(x)) 129#endif /* HAVE_LOG2F */ 130 131#if !HAVE_LOG10F 132#undef log10f 133#define log10f(x) ((float)log10(x)) 134#endif 135 136#if !HAVE_SINF 137#undef sinf 138#define sinf(x) ((float)sin(x)) 139#endif 140 141#if !HAVE_RINT 142static inline double rint(double x) 143{ 144 return x >= 0 ? floor(x + 0.5) : ceil(x - 0.5); 145} 146#endif /* HAVE_RINT */ 147 148#if !HAVE_LRINT 149static av_always_inline av_const long int lrint(double x) 150{ 151 return rint(x); 152} 153#endif /* HAVE_LRINT */ 154 155#if !HAVE_LRINTF 156static av_always_inline av_const long int lrintf(float x) 157{ 158 return (int)(rint(x)); 159} 160#endif /* HAVE_LRINTF */ 161 162#if !HAVE_ROUND 163static av_always_inline av_const double round(double x) 164{ 165 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); 166} 167#endif /* HAVE_ROUND */ 168 169#if !HAVE_ROUNDF 170static av_always_inline av_const float roundf(float x) 171{ 172 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); 173} 174#endif /* HAVE_ROUNDF */ 175 176#if !HAVE_TRUNC 177static av_always_inline av_const double trunc(double x) 178{ 179 return (x > 0) ? floor(x) : ceil(x); 180} 181#endif /* HAVE_TRUNC */ 182 183#if !HAVE_TRUNCF 184static av_always_inline av_const float truncf(float x) 185{ 186 return (x > 0) ? floor(x) : ceil(x); 187} 188#endif /* HAVE_TRUNCF */ 189 190#endif /* AVUTIL_LIBM_H */ 191