mathops.h File Reference

Various math functions. More...

#include "arch.h"
#include "entcode.h"
#include "os_support.h"

Go to the source code of this file.

Macros
#define	FRAC_MUL16(a, b)   ((16384+((opus_int32)(opus_int16)(a)*(opus_int16)(b)))>>15)
#define	celt_maxabs32(x, len)   celt_maxabs16(x,len)
#define	PI   3.141592653f
#define	celt_sqrt(x)   ((float)sqrt(x))
#define	celt_rsqrt(x)   (1.f/celt_sqrt(x))
#define	celt_rsqrt_norm(x)   (celt_rsqrt(x))
#define	celt_cos_norm(x)   ((float)cos((.5f*PI)*(x)))
#define	celt_rcp(x)   (1.f/(x))
#define	celt_div(a, b)   ((a)/(b))
#define	frac_div32(a, b)   ((float)(a)/(b))
#define	celt_log2(x)   ((float)(1.442695040888963387*log(x)))
#define	celt_exp2(x)   ((float)exp(0.6931471805599453094*(x)))

Functions
unsigned	isqrt32 (opus_uint32 _val)

Detailed Description

Various math functions.

Macro Definition Documentation

celt_cos_norm

#define celt_cos_norm

(

x

)

((float)cos((.5f*PI)*(x)))

celt_div

#define celt_div	(		a,
			b
	)		((a)/(b))

celt_exp2

#define celt_exp2

(

x

)

((float)exp(0.6931471805599453094*(x)))

celt_log2

#define celt_log2

(

x

)

((float)(1.442695040888963387*log(x)))

celt_maxabs32

#define celt_maxabs32	(		x,
			len
	)		celt_maxabs16(x,len)

celt_rcp

#define celt_rcp

(

x

)

(1.f/(x))

celt_rsqrt

#define celt_rsqrt

(

x

)

(1.f/celt_sqrt(x))

celt_rsqrt_norm

#define celt_rsqrt_norm

(

x

)

(celt_rsqrt(x))

celt_sqrt

#define celt_sqrt

(

x

)

((float)sqrt(x))

frac_div32

#define frac_div32	(		a,
			b
	)		((float)(a)/(b))

FRAC_MUL16

#define FRAC_MUL16	(		a,
			b
	)		((16384+((opus_int32)(opus_int16)(a)*(opus_int16)(b)))>>15)

PI

#define PI   3.141592653f

Function Documentation

isqrt32()

unsigned isqrt32

(

opus_uint32

_val

)