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| -rw-r--r-- | libavutil/tablegen.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/libavutil/tablegen.h b/libavutil/tablegen.h new file mode 100644 index 0000000000..f81b46b7dc --- /dev/null +++ b/libavutil/tablegen.h @@ -0,0 +1,53 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * Compatibility libm for table generation files + */ + +#ifndef AVUTIL_TABLEGEN_H +#define AVUTIL_TABLEGEN_H + +// we lack some functions on all host platforms, and we don't care about +// performance and/or strict ISO C semantics as it's performed at build time +static inline double ff_cbrt(double x) +{ + return x < 0 ? -pow(-x, 1.0 / 3.0) : pow(x, 1.0 / 3.0); +} +#define cbrt ff_cbrt + +static inline double ff_rint(double x) +{ + return x >= 0 ? floor(x + 0.5) : ceil(x - 0.5); +} +#define rint ff_rint + +static inline long long ff_llrint(double x) +{ + return rint(x); +} +#define llrint ff_llrint + +static inline long ff_lrint(double x) +{ + return rint(x); +} +#define lrint ff_lrint + +#endif /* AVUTIL_TABLEGEN_H */ |