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53 lines
1.6 KiB
53 lines
1.6 KiB
/* |
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* Rational numbers |
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* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This library 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 of the License, or (at your option) any later version. |
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* |
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* This library 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 this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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*/ |
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/** |
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* @file rational.h |
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* Rational numbers. |
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* @author Michael Niedermayer <michaelni@gmx.at> |
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*/ |
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#ifndef RATIONAL_H |
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#define RATIONAL_H |
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typedef struct AVRational{ |
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int num; |
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int den; |
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} AVRational; |
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static inline int av_cmp_q(AVRational a, AVRational b){ |
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const int64_t tmp= a.num * (int64_t)b.den - b.num * (int64_t)a.den; |
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if (tmp < 0) return -1; |
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else if(tmp == 0) return 0; |
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else return 1; |
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} |
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static inline double av_q2d(AVRational a){ |
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return a.num / (double) a.den; |
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} |
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AVRational av_mul_q(AVRational b, AVRational c); |
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AVRational av_div_q(AVRational b, AVRational c); |
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AVRational av_add_q(AVRational b, AVRational c); |
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AVRational av_sub_q(AVRational b, AVRational c); |
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AVRational av_d2q(double d, int max); |
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#endif // RATIONAL_H
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