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
ff_cbrt(double x)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
ff_rint(double x)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
ff_llrint(double x)43 static inline long long ff_llrint(double x)
44 {
45 return rint(x);
46 }
47 #define llrint ff_llrint
48
ff_lrint(double x)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 */
56