#ifndef MATHEMATICS_H
#define MATHEMATICS_H
#include "rational.h"
enum AVRounding {
AV_ROUND_ZERO = 0, ///< round toward zero
AV_ROUND_INF = 1, ///< round away from zero
AV_ROUND_DOWN = 2, ///< round toward -infinity
AV_ROUND_UP = 3, ///< round toward +infinity
AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
};
/**
* rescale a 64bit integer with rounding to nearest.
* a simple a*b/c isn't possible as it can overflow
*/
int64_t av_rescale(int64_t a, int64_t b, int64_t c);
/**
* rescale a 64bit integer with specified rounding.
* a simple a*b/c isn't possible as it can overflow
*/
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
/**
* rescale a 64bit integer by 2 rational numbers.
*/
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq);
#endif /* MATHEMATICS_H */