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.
39 lines
637 B
39 lines
637 B
#include "Lfo.h"
|
|
#define _USE_MATH_DEFINES
|
|
#include <math.h> /*sin*/
|
|
|
|
Lfo::Lfo()
|
|
: index(0), sampleRate(0), frequency(0), phase(0)
|
|
{}
|
|
|
|
Lfo::~Lfo(void) {}
|
|
|
|
void Lfo::initialize(float sr, float freq)
|
|
{
|
|
sampleRate = sr;
|
|
frequency = freq;
|
|
}
|
|
|
|
void Lfo::setFrequency(float freq)
|
|
{
|
|
frequency = freq;
|
|
}
|
|
|
|
void Lfo::setPhase(float ph)
|
|
{
|
|
phase = ph;
|
|
}
|
|
|
|
float Lfo::getValue()
|
|
{
|
|
const float dp = 2 * M_PI * frequency / sampleRate; // phase step
|
|
|
|
float value = sin(phase);
|
|
value = (value + 1) * 0.5; // transform from [-1; 1] to [0; 1]
|
|
|
|
phase += dp;
|
|
while(phase > 2 * M_PI)
|
|
phase -= 2 * M_PI;
|
|
|
|
return value;
|
|
}
|
|
|