| /* |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * Replacements for frequently missing libm functions |
| */ |
| |
| #ifndef AVUTIL_LIBM_H |
| #define AVUTIL_LIBM_H |
| |
| #include <math.h> |
| #include "config.h" |
| #include "attributes.h" |
| |
| #if !HAVE_CBRTF |
| #undef cbrtf |
| #define cbrtf(x) powf(x, 1.0/3.0) |
| #endif /* HAVE_CBRTF */ |
| |
| #if !HAVE_EXP2 |
| #undef exp2 |
| #define exp2(x) exp((x) * 0.693147180559945) |
| #endif /* HAVE_EXP2 */ |
| |
| #if !HAVE_EXP2F |
| #undef exp2f |
| #define exp2f(x) ((float)exp2(x)) |
| #endif /* HAVE_EXP2F */ |
| |
| #if !HAVE_LLRINT |
| #undef llrint |
| #define llrint(x) ((long long)rint(x)) |
| #endif /* HAVE_LLRINT */ |
| |
| #if !HAVE_LLRINTF |
| #undef llrintf |
| #define llrintf(x) ((long long)rint(x)) |
| #endif /* HAVE_LLRINT */ |
| |
| #if !HAVE_LOG2 |
| #undef log2 |
| #define log2(x) (log(x) * 1.44269504088896340736) |
| #endif /* HAVE_LOG2 */ |
| |
| #if !HAVE_LOG2F |
| #undef log2f |
| #define log2f(x) ((float)log2(x)) |
| #endif /* HAVE_LOG2F */ |
| |
| #if !HAVE_LRINT |
| static av_always_inline av_const long int lrint(double x) |
| { |
| return rint(x); |
| } |
| #endif /* HAVE_LRINT */ |
| |
| #if !HAVE_LRINTF |
| static av_always_inline av_const long int lrintf(float x) |
| { |
| return (int)(rint(x)); |
| } |
| #endif /* HAVE_LRINTF */ |
| |
| #if !HAVE_ROUND |
| static av_always_inline av_const double round(double x) |
| { |
| return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); |
| } |
| #endif /* HAVE_ROUND */ |
| |
| #if !HAVE_ROUNDF |
| static av_always_inline av_const float roundf(float x) |
| { |
| return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); |
| } |
| #endif /* HAVE_ROUNDF */ |
| |
| #if !HAVE_TRUNC |
| static av_always_inline av_const double trunc(double x) |
| { |
| return (x > 0) ? floor(x) : ceil(x); |
| } |
| #endif /* HAVE_TRUNC */ |
| |
| #if !HAVE_TRUNCF |
| static av_always_inline av_const float truncf(float x) |
| { |
| return (x > 0) ? floor(x) : ceil(x); |
| } |
| #endif /* HAVE_TRUNCF */ |
| |
| #endif /* AVUTIL_LIBM_H */ |