rational.h File Reference

Utilties for rational number calculation. More...

#include <stdint.h>
#include <limits.h>
#include "attributes.h"

Go to the source code of this file.

Data Structures
struct	AVRational
	Rational number (pair of numerator and denominator). More...

Functions
static AVRational	av_make_q (int num, int den)
	Create an AVRational. More...
static int	av_cmp_q (AVRational a, AVRational b)
	Compare two rationals. More...
static double	av_q2d (AVRational a)
	Convert an AVRational to a double. More...
int	av_reduce (int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
	Reduce a fraction. More...
AVRational	av_mul_q (AVRational b, AVRational c) av_const
	Multiply two rationals. More...
AVRational	av_div_q (AVRational b, AVRational c) av_const
	Divide one rational by another. More...
AVRational	av_add_q (AVRational b, AVRational c) av_const
	Add two rationals. More...
AVRational	av_sub_q (AVRational b, AVRational c) av_const
	Subtract one rational from another. More...
static av_always_inline AVRational	av_inv_q (AVRational q)
	Invert a rational. More...
AVRational	av_d2q (double d, int max) av_const
	Convert a double precision floating point number to a rational. More...
int	av_nearer_q (AVRational q, AVRational q1, AVRational q2)
	Find which of the two rationals is closer to another rational. More...
int	av_find_nearest_q_idx (AVRational q, const AVRational *q_list)
	Find the value in a list of rationals nearest a given reference rational. More...
uint32_t	av_q2intfloat (AVRational q)
	Convert an AVRational to a IEEE 32-bit float expressed in fixed-point format. More...

Detailed Description

Utilties for rational number calculation.

Author

Michael Niedermayer micha.nosp@m.elni.nosp@m.@gmx..nosp@m.at

Definition in file rational.h.