/*
* Rational numbers
* Copyright (c) 2003 Michael Niedermayer
*
* 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
*/
#ifndef RATIONAL_H
#define RATIONAL_H
typedef struct AVRational{
int num;
int den;
} AVRational;
static inline 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){
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