rational.h
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上传日期:2021-12-09
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文件大小:2k
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Audio
开发平台:
Visual C++
- /* * Rational numbers * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> * * This library 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 of the License, or (at your option) any later version. * * This library 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 this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ /** * @file rational.h * Rational numbers. * @author Michael Niedermayer <michaelni@gmx.at> */ #ifndef RATIONAL_H #define RATIONAL_H typedef struct AVRational{
- int num;
- int den;
- } AVRational;
- static inline int av_cmp_q(AVRational a, AVRational b){
- //static int av_cmp_q(AVRational a, AVRational b){
- const int64_t tmp= a.num * (int64_t)b.den - b.num * (int64_t)a.den;
- if (tmp < 0) return -1;
- else if(tmp == 0) return 0;
- else return 1;
- }
- //static inline double av_q2d(AVRational a){
- static double av_q2d(AVRational a){
- return a.num / (double) a.den;
- }
- AVRational av_mul_q(AVRational b, AVRational c); AVRational av_div_q(AVRational b, AVRational c); AVRational av_add_q(AVRational b, AVRational c); AVRational av_sub_q(AVRational b, AVRational c); AVRational av_d2q(double d, int max); #endif // RATIONAL_H