hvirtual/quicktime/ffmpeg/libavcodec/integer.h File Reference

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Data Structures
struct	AVInteger
Defines
#define	AV_INTEGER_SIZE   8
Functions
AVInteger	av_add_i (AVInteger a, AVInteger b)
AVInteger	av_sub_i (AVInteger a, AVInteger b)
int	av_log2_i (AVInteger a)
AVInteger	av_mul_i (AVInteger a, AVInteger b)
int	av_cmp_i (AVInteger a, AVInteger b)
AVInteger	av_shr_i (AVInteger a, int s)
AVInteger	av_mod_i (AVInteger *quot, AVInteger a, AVInteger b)
AVInteger	av_div_i (AVInteger a, AVInteger b)
AVInteger	av_int2i (int64_t a)
int64_t	av_i2int (AVInteger a)

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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 30 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
	)

Definition at line 30 of file integer.c.

References AV_INTEGER_SIZE, and AVInteger::v.

Referenced by av_rescale_rnd().

int av_cmp_i	(	AVInteger	a,
		AVInteger	b
	)

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

Definition at line 88 of file integer.c.

References AV_INTEGER_SIZE, and AVInteger::v.

Referenced by av_mod_i().

AVInteger av_div_i	(	AVInteger	a,
		AVInteger	b
	)

returns a/b.

Definition at line 149 of file integer.c.

References av_mod_i().

Referenced by av_rescale_rnd().

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int64_t av_i2int

(

AVInteger

a

)

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 64bit will be used

Definition at line 174 of file integer.c.

References AV_INTEGER_SIZE, and AVInteger::v.

Referenced by av_rescale_rnd().

AVInteger av_int2i

(

int64_t

a

)

converts the given int64_t to an AVInteger.

Definition at line 158 of file integer.c.

References AV_INTEGER_SIZE, and AVInteger::v.

Referenced by av_rescale_rnd().

int av_log2_i

(

AVInteger

a

)

returns the rounded down value of the logarithm of base 2 of the given AVInteger. this is simply the index of the most significant bit which is 1. Or 0 of all bits are 0

Definition at line 54 of file integer.c.

References AV_INTEGER_SIZE, and AVInteger::v.

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 122 of file integer.c.

References av_cmp_i(), AV_INTEGER_SIZE, av_log2_i(), av_shr_i(), av_sub_i(), and AVInteger::v.

Referenced by av_div_i().

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AVInteger av_mul_i	(	AVInteger	a,
		AVInteger	b
	)

Definition at line 64 of file integer.c.

References AV_INTEGER_SIZE, av_log2_i(), nb, and AVInteger::v.

Referenced by av_rescale_rnd().

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AVInteger av_shr_i	(	AVInteger	a,
		int	s
	)

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 104 of file integer.c.

References AV_INTEGER_SIZE, and AVInteger::v.

Referenced by av_mod_i().

AVInteger av_sub_i	(	AVInteger	a,
		AVInteger	b
	)

Definition at line 40 of file integer.c.

References AV_INTEGER_SIZE, and AVInteger::v.

Referenced by av_mod_i().