projects / libav.git / blame
| Commit | Line | Data |
|---|---|---|
| 335ee1aa | 1 | /* |
| 2912e87a | 2 | * This file is part of Libav. |
| 335ee1aa | 3 | * |
| 2912e87a | 4 | * Libav is free software; you can redistribute it and/or |
| 335ee1aa MR |
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 | * | |
| 2912e87a | 9 | * Libav is distributed in the hope that it will be useful, |
| 335ee1aa MR |
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 | |
| 2912e87a | 15 | * License along with Libav; if not, write to the Free Software |
| 335ee1aa MR |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ | |
| 18 | ||
| 19 | /** | |
| ba87f080 | 20 | * @file |
| 335ee1aa MR |
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" | |
| 297bfb2f | 29 | #include "attributes.h" |
| 335ee1aa MR |
30 | |
| 31 | #if !HAVE_EXP2 | |
| 32 | #undef exp2 | |
| 33 | #define exp2(x) exp((x) * 0.693147180559945) | |
| 34 | #endif /* HAVE_EXP2 */ | |
| 35 | ||
| 36 | #if !HAVE_EXP2F | |
| 37 | #undef exp2f | |
| 38 | #define exp2f(x) ((float)exp2(x)) | |
| 39 | #endif /* HAVE_EXP2F */ | |
| 40 | ||
| 41 | #if !HAVE_LLRINT | |
| 42 | #undef llrint | |
| 43 | #define llrint(x) ((long long)rint(x)) | |
| 44 | #endif /* HAVE_LLRINT */ | |
| 45 | ||
| 07876e25 MR |
46 | #if !HAVE_LLRINTF |
| 47 | #undef llrintf | |
| 48 | #define llrintf(x) ((long long)rint(x)) | |
| 49 | #endif /* HAVE_LLRINT */ | |
| 50 | ||
| 335ee1aa MR |
51 | #if !HAVE_LOG2 |
| 52 | #undef log2 | |
| 53 | #define log2(x) (log(x) * 1.44269504088896340736) | |
| 54 | #endif /* HAVE_LOG2 */ | |
| 55 | ||
| 56 | #if !HAVE_LOG2F | |
| 57 | #undef log2f | |
| 58 | #define log2f(x) ((float)log2(x)) | |
| 59 | #endif /* HAVE_LOG2F */ | |
| 60 | ||
| 61 | #if !HAVE_LRINT | |
| 62 | static av_always_inline av_const long int lrint(double x) | |
| 63 | { | |
| 64 | return rint(x); | |
| 65 | } | |
| 66 | #endif /* HAVE_LRINT */ | |
| 67 | ||
| 68 | #if !HAVE_LRINTF | |
| 69 | static av_always_inline av_const long int lrintf(float x) | |
| 70 | { | |
| 71 | return (int)(rint(x)); | |
| 72 | } | |
| 73 | #endif /* HAVE_LRINTF */ | |
| 74 | ||
| 75 | #if !HAVE_ROUND | |
| 76 | static av_always_inline av_const double round(double x) | |
| 77 | { | |
| 78 | return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); | |
| 79 | } | |
| 80 | #endif /* HAVE_ROUND */ | |
| 81 | ||
| 82 | #if !HAVE_ROUNDF | |
| 83 | static av_always_inline av_const float roundf(float x) | |
| 84 | { | |
| 85 | return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); | |
| 86 | } | |
| 87 | #endif /* HAVE_ROUNDF */ | |
| 88 | ||
| 89 | #if !HAVE_TRUNCF | |
| 90 | static av_always_inline av_const float truncf(float x) | |
| 91 | { | |
| 92 | return (x > 0) ? floor(x) : ceil(x); | |
| 93 | } | |
| 94 | #endif /* HAVE_TRUNCF */ | |
| 95 | ||
| 96 | #endif /* AVUTIL_LIBM_H */ |