Generate Pink Noise using Gardner method. More...

#include <stdio.h>
#include <math.h>
#include "portaudio.h"

Data Structures
struct	PinkNoise

struct	paTestData

Macros
#define	PINK_MAX_RANDOM_ROWS (30)

#define	PINK_RANDOM_BITS (24)

#define	PINK_RANDOM_SHIFT ((sizeof(long)*8)-PINK_RANDOM_BITS)

#define	PINK_MEASURE

#define	PINK_TEST

Functions
void	InitializePinkNoise (PinkNoise *pink, int numRows)

float	GeneratePinkNoise (PinkNoise *pink)

int	main (void)

Variables
float	pinkMax = -999.0

float	pinkMin = 999.0

Detailed Description

Generate Pink Noise using Gardner method.

Optimization suggested by James McCartney uses a tree to select which random value to replace.

    x x x x x x x x x x x x x x x x
    x   x   x   x   x   x   x   x
    x       x       x       x
     x               x
       x

Tree is generated by counting trailing zeros in an increasing index. When the index is zero, no random number is selected.

Author: Phil Burk http://www.softsynth.com

Definition in file paex_pink.c.

Macro Definition Documentation

◆ PINK_MAX_RANDOM_ROWS

#define PINK_MAX_RANDOM_ROWS (30)

Definition at line 61 of file paex_pink.c.

◆ PINK_MEASURE

#define PINK_MEASURE

Definition at line 106 of file paex_pink.c.

◆ PINK_RANDOM_BITS

#define PINK_RANDOM_BITS (24)

Definition at line 62 of file paex_pink.c.

◆ PINK_RANDOM_SHIFT

#define PINK_RANDOM_SHIFT ((sizeof(long)*8)-PINK_RANDOM_BITS)

Definition at line 63 of file paex_pink.c.

◆ PINK_TEST

#define PINK_TEST

Definition at line 156 of file paex_pink.c.

Function Documentation

◆ GeneratePinkNoise()

float GeneratePinkNoise ( PinkNoise * pink )

Definition at line 113 of file paex_pink.c.

◆ InitializePinkNoise()

void InitializePinkNoise	(	PinkNoise *	pink,
		int	numRows )

Definition at line 92 of file paex_pink.c.

◆ main()

int main ( void )

Definition at line 208 of file paex_pink.c.

Variable Documentation

◆ pinkMax

float pinkMax = -999.0

Definition at line 108 of file paex_pink.c.

◆ pinkMin

float pinkMin = 999.0

Definition at line 109 of file paex_pink.c.

Data Structures

Macros

Functions

Variables