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96 lines
2.2 KiB
96 lines
2.2 KiB
/* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* Replacements for frequently missing libm functions |
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*/ |
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#ifndef AVUTIL_LIBM_H |
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#define AVUTIL_LIBM_H |
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#include <math.h> |
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#include "config.h" |
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#include "attributes.h" |
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#if !HAVE_EXP2 |
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#undef exp2 |
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#define exp2(x) exp((x) * 0.693147180559945) |
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#endif /* HAVE_EXP2 */ |
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#if !HAVE_EXP2F |
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#undef exp2f |
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#define exp2f(x) ((float)exp2(x)) |
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#endif /* HAVE_EXP2F */ |
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#if !HAVE_LLRINT |
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#undef llrint |
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#define llrint(x) ((long long)rint(x)) |
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#endif /* HAVE_LLRINT */ |
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#if !HAVE_LLRINTF |
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#undef llrintf |
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#define llrintf(x) ((long long)rint(x)) |
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#endif /* HAVE_LLRINT */ |
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#if !HAVE_LOG2 |
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#undef log2 |
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#define log2(x) (log(x) * 1.44269504088896340736) |
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#endif /* HAVE_LOG2 */ |
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#if !HAVE_LOG2F |
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#undef log2f |
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#define log2f(x) ((float)log2(x)) |
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#endif /* HAVE_LOG2F */ |
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#if !HAVE_LRINT |
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static av_always_inline av_const long int lrint(double x) |
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{ |
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return rint(x); |
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} |
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#endif /* HAVE_LRINT */ |
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#if !HAVE_LRINTF |
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static av_always_inline av_const long int lrintf(float x) |
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{ |
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return (int)(rint(x)); |
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} |
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#endif /* HAVE_LRINTF */ |
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#if !HAVE_ROUND |
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static av_always_inline av_const double round(double x) |
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{ |
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return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); |
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} |
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#endif /* HAVE_ROUND */ |
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#if !HAVE_ROUNDF |
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static av_always_inline av_const float roundf(float x) |
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{ |
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return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); |
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} |
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#endif /* HAVE_ROUNDF */ |
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#if !HAVE_TRUNCF |
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static av_always_inline av_const float truncf(float x) |
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{ |
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return (x > 0) ? floor(x) : ceil(x); |
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} |
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#endif /* HAVE_TRUNCF */ |
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#endif /* AVUTIL_LIBM_H */
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