libavutil/integer.h File Reference

arbitrary precision integers More...

#include <stdint.h>
#include "common.h"

Go to the source code of this file.

Data Structures

struct  AVInteger

Defines

#define AV_INTEGER_SIZE   8

Functions

AVInteger av_add_i (AVInteger a, AVInteger b) av_const
AVInteger av_sub_i (AVInteger a, AVInteger b) av_const
int av_log2_i (AVInteger a) av_const
 Returns the rounded-down value of the base 2 logarithm of the given AVInteger.
AVInteger av_mul_i (AVInteger a, AVInteger b) av_const
int av_cmp_i (AVInteger a, AVInteger b) av_const
 Returns 0 if a==b, 1 if a>b and -1 if a<b.
AVInteger av_shr_i (AVInteger a, int s) av_const
 bitwise shift
AVInteger av_mod_i (AVInteger *quot, AVInteger a, AVInteger b)
 Returns a % b.
AVInteger av_div_i (AVInteger a, AVInteger b) av_const
 Returns a/b.
AVInteger av_int2i (int64_t a) av_const
 Converts the given int64_t to an AVInteger.
int64_t av_i2int (AVInteger a) av_const
 Converts the given AVInteger to an int64_t.


Detailed Description

arbitrary precision integers

Author:
Michael Niedermayer <michaelni@gmx.at>

Definition in file integer.h.


Define Documentation

#define AV_INTEGER_SIZE   8


Function Documentation

AVInteger av_add_i ( AVInteger  a,
AVInteger  b 
) const

Definition at line 31 of file integer.c.

Referenced by av_rescale_rnd().

int av_cmp_i ( AVInteger  a,
AVInteger  b 
) const

Returns 0 if a==b, 1 if a>b and -1 if a<b.

Definition at line 82 of file integer.c.

Referenced by av_mod_i().

AVInteger av_div_i ( AVInteger  a,
AVInteger  b 
) const

Returns a/b.

Definition at line 132 of file integer.c.

Referenced by av_rescale_rnd().

int64_t av_i2int ( AVInteger  a  )  const

Converts the given AVInteger to an int64_t.

If the AVInteger is too large to fit into an int64_t, then only the least significant 64 bits will be used.

Definition at line 149 of file integer.c.

Referenced by av_rescale_rnd().

AVInteger av_int2i ( int64_t  a  )  const

Converts the given int64_t to an AVInteger.

Definition at line 138 of file integer.c.

Referenced by av_rescale_rnd().

int av_log2_i ( AVInteger  a  )  const

Returns the rounded-down value of the base 2 logarithm of the given AVInteger.

This is simply the index of the most significant bit which is 1, or 0 if all bits are 0.

Definition at line 51 of file integer.c.

Referenced by av_mod_i(), and av_mul_i().

AVInteger av_mod_i ( AVInteger quot,
AVInteger  a,
AVInteger  b 
)

Returns a % b.

Parameters:
quot a/b will be stored here.

Definition at line 108 of file integer.c.

Referenced by av_div_i().

AVInteger av_mul_i ( AVInteger  a,
AVInteger  b 
) const

Definition at line 61 of file integer.c.

Referenced by av_rescale_rnd().

AVInteger av_shr_i ( AVInteger  a,
int  s 
) const

bitwise shift

Parameters:
s the number of bits by which the value should be shifted right, may be negative for shifting left

Definition at line 94 of file integer.c.

Referenced by av_mod_i().

AVInteger av_sub_i ( AVInteger  a,
AVInteger  b 
) const

Definition at line 41 of file integer.c.

Referenced by av_mod_i().


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