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.

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Detailed Description

arbitrary precision integers

Author:

Michael Niedermayer <michaelni@gmx.at>

Definition in file integer.h.

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Define Documentation

#define AV_INTEGER_SIZE   8

Definition at line 34 of file integer.h.

Referenced by av_add_i(), av_cmp_i(), av_i2int(), av_int2i(), av_log2_i(), av_mod_i(), av_mul_i(), av_shr_i(), and av_sub_i().

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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().