38 lines
1017 B
C++
38 lines
1017 B
C++
#pragma once
|
|
#define _USE_MATH_DEFINES
|
|
#include <math.h>
|
|
#include <cstdlib>
|
|
|
|
namespace trnr {
|
|
template <typename t_sample>
|
|
class demo_noise {
|
|
public:
|
|
void set_samplerate(double _samplerate) {
|
|
samplerate = _samplerate;
|
|
}
|
|
|
|
void process_block(t_sample** samples, long sample_frames) {
|
|
|
|
for (int s = 0; s < sample_frames; s++) {
|
|
demo_counter++;
|
|
|
|
if (demo_counter == samplerate * 20) {
|
|
demo_counter = 0;
|
|
}
|
|
if (demo_counter > samplerate * 17) {
|
|
t_sample r1 = static_cast<t_sample>(rand()) / static_cast<t_sample>(RAND_MAX);
|
|
t_sample r2 = static_cast<t_sample>(rand()) / static_cast<t_sample>(RAND_MAX);
|
|
|
|
t_sample noise = static_cast<t_sample>(sqrt(-2.0 * log(r1)) * cos(2.0 * M_PI * r2));
|
|
|
|
samples[0][s] = noise / 10.0;
|
|
samples[1][s] = noise / 10.0;
|
|
}
|
|
}
|
|
}
|
|
|
|
private:
|
|
double samplerate = 44100;
|
|
int demo_counter = 0;
|
|
};
|
|
} |