FFmpeg  4.0
tablegen.h
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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
31 static 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 
37 static 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 
43 static inline long long ff_llrint(double x)
44 {
45  return rint(x);
46 }
47 #define llrint ff_llrint
48 
49 static inline long ff_lrint(double x)
50 {
51  return rint(x);
52 }
53 #define lrint ff_lrint
54 
55 #endif /* AVUTIL_TABLEGEN_H */
static long ff_lrint(double x)
Definition: tablegen.h:49
#define rint
Definition: tablegen.h:41
static long long ff_llrint(double x)
Definition: tablegen.h:43
static double ff_cbrt(double x)
Definition: tablegen.h:31
static double ff_rint(double x)
Definition: tablegen.h:37