Commit | Line | Data |
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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" |
46df708b | 30 | #include "intfloat.h" |
335ee1aa | 31 | |
15333562 MR |
32 | #if !HAVE_CBRTF |
33 | static av_always_inline float cbrtf(float x) | |
34 | { | |
35 | return x < 0 ? -powf(-x, 1.0 / 3.0) : powf(x, 1.0 / 3.0); | |
36 | } | |
37 | #endif | |
38 | ||
335ee1aa MR |
39 | #if !HAVE_EXP2 |
40 | #undef exp2 | |
41 | #define exp2(x) exp((x) * 0.693147180559945) | |
42 | #endif /* HAVE_EXP2 */ | |
43 | ||
44 | #if !HAVE_EXP2F | |
45 | #undef exp2f | |
46 | #define exp2f(x) ((float)exp2(x)) | |
47 | #endif /* HAVE_EXP2F */ | |
48 | ||
46df708b MS |
49 | #if !HAVE_ISINF |
50 | static av_always_inline av_const int isinf(float x) | |
51 | { | |
52 | uint32_t v = av_float2int(x); | |
53 | if ((v & 0x7f800000) != 0x7f800000) | |
54 | return 0; | |
55 | return !(v & 0x007fffff); | |
56 | } | |
57 | #endif /* HAVE_ISINF */ | |
58 | ||
59 | #if !HAVE_ISNAN | |
60 | static av_always_inline av_const int isnan(float x) | |
61 | { | |
62 | uint32_t v = av_float2int(x); | |
63 | if ((v & 0x7f800000) != 0x7f800000) | |
64 | return 0; | |
65 | return v & 0x007fffff; | |
66 | } | |
67 | #endif /* HAVE_ISNAN */ | |
68 | ||
335ee1aa MR |
69 | #if !HAVE_LLRINT |
70 | #undef llrint | |
71 | #define llrint(x) ((long long)rint(x)) | |
72 | #endif /* HAVE_LLRINT */ | |
73 | ||
07876e25 MR |
74 | #if !HAVE_LLRINTF |
75 | #undef llrintf | |
76 | #define llrintf(x) ((long long)rint(x)) | |
77 | #endif /* HAVE_LLRINT */ | |
78 | ||
335ee1aa MR |
79 | #if !HAVE_LOG2 |
80 | #undef log2 | |
81 | #define log2(x) (log(x) * 1.44269504088896340736) | |
82 | #endif /* HAVE_LOG2 */ | |
83 | ||
84 | #if !HAVE_LOG2F | |
85 | #undef log2f | |
86 | #define log2f(x) ((float)log2(x)) | |
87 | #endif /* HAVE_LOG2F */ | |
88 | ||
89 | #if !HAVE_LRINT | |
90 | static av_always_inline av_const long int lrint(double x) | |
91 | { | |
92 | return rint(x); | |
93 | } | |
94 | #endif /* HAVE_LRINT */ | |
95 | ||
96 | #if !HAVE_LRINTF | |
97 | static av_always_inline av_const long int lrintf(float x) | |
98 | { | |
99 | return (int)(rint(x)); | |
100 | } | |
101 | #endif /* HAVE_LRINTF */ | |
102 | ||
103 | #if !HAVE_ROUND | |
104 | static av_always_inline av_const double round(double x) | |
105 | { | |
106 | return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); | |
107 | } | |
108 | #endif /* HAVE_ROUND */ | |
109 | ||
110 | #if !HAVE_ROUNDF | |
111 | static av_always_inline av_const float roundf(float x) | |
112 | { | |
113 | return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); | |
114 | } | |
115 | #endif /* HAVE_ROUNDF */ | |
116 | ||
23d3931a MS |
117 | #if !HAVE_TRUNC |
118 | static av_always_inline av_const double trunc(double x) | |
119 | { | |
120 | return (x > 0) ? floor(x) : ceil(x); | |
121 | } | |
122 | #endif /* HAVE_TRUNC */ | |
123 | ||
335ee1aa MR |
124 | #if !HAVE_TRUNCF |
125 | static av_always_inline av_const float truncf(float x) | |
126 | { | |
127 | return (x > 0) ? floor(x) : ceil(x); | |
128 | } | |
129 | #endif /* HAVE_TRUNCF */ | |
130 | ||
131 | #endif /* AVUTIL_LIBM_H */ |