scales.h File Reference

#include <math.h>
#include "os.h"

Go to the source code of this file.

Macros
#define	VORBIS_IEEE_FLOAT32   1
#define	todB_nn(x)
#define	fromdB(x)
#define	toBARK(n)
#define	fromBARK(z)
#define	toMEL(n)
#define	fromMEL(m)
#define	toOC(n)
#define	fromOC(o)

Functions
static float	unitnorm (float x)
static float	todB (const float *x)

Macro Definition Documentation

fromBARK

#define fromBARK

(

z

)

Value:

(102.f*(z)-2.f*pow(z,2.f)+.4f*pow(z,3.f)+pow(1.46f,z)-1.f)

fromdB

#define fromdB

(

x

)

Value:

(exp((x)*.11512925f))

fromMEL

#define fromMEL

(

m

)

Value:

(1000.f*exp((m)/1442.695f)-1000.f)

fromOC

#define fromOC

(

o

)

Value:

(exp(((o)+5.965784f)*.693147f))

toBARK

#define toBARK

(

n

)

Value:

(13.1f*atan(.00074f*(n))+2.24f*atan((n)*(n)*1.85e-8f)+1e-4f*(n))

todB_nn

#define todB_nn

(

x

)

Value:

todB(x)

toMEL

#define toMEL

(

n

)

Value:

(log(1.f+(n)*.001f)*1442.695f)

toOC

#define toOC

(

n

)

Value:

(log(n)*1.442695f-5.965784f)

VORBIS_IEEE_FLOAT32

#define VORBIS_IEEE_FLOAT32   1

Function Documentation

todB()

float todB ( const float * x )

inlinestatic

unitnorm()

float unitnorm ( float x )

inlinestatic