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Data Structures | Functions
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.