You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
870 B
43 lines
870 B
#pragma once
|
|
#ifndef DSY_WHITENOISE_H
|
|
#define DSY_WHITENOISE_H
|
|
#include <stdint.h>
|
|
#ifdef __cplusplus
|
|
namespace daisysp
|
|
{
|
|
/** fast white noise generator
|
|
|
|
I think this came from musicdsp.org at some point
|
|
*/
|
|
class WhiteNoise
|
|
{
|
|
public:
|
|
WhiteNoise() {}
|
|
~WhiteNoise() {}
|
|
/** Initializes the WhiteNoise object
|
|
*/
|
|
void Init()
|
|
{
|
|
amp_ = 1.0f;
|
|
randseed_ = 1;
|
|
}
|
|
|
|
/** sets the amplitude of the noise output
|
|
*/
|
|
inline void SetAmp(float a) { amp_ = a; }
|
|
/** returns a new sample of noise in the range of -amp_ to amp_
|
|
*/
|
|
inline float Process()
|
|
{
|
|
randseed_ *= 16807;
|
|
return (randseed_ * coeff_) * amp_;
|
|
}
|
|
|
|
private:
|
|
static constexpr float coeff_ = 4.6566129e-010f;
|
|
float amp_;
|
|
int32_t randseed_;
|
|
};
|
|
} // namespace daisysp
|
|
#endif
|
|
#endif
|
|
|