blob: 02acdd61e88531ea42d9cb7e980aabcadb98271d
| 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 */ |
| 56 |