sys-id: implement linear and log sine sweeps

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bresch 2023-07-18 12:25:37 +02:00
parent 8ba18a78af
commit 7f23eba46f
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/**
* @file signal_generator.hpp
*/
#pragma once
namespace signal_generator
{
float getLinearSineSweep(float f_start, float f_end, float duration, float t)
{
if (t > duration) {
return 0.f;
}
const float w_start = f_start * M_TWOPI_F;
const float w_end = f_end * M_TWOPI_F;
return sinf(w_start * t + 0.5f * (w_end - w_start) * t * t / duration);
}
float getLogSineSweep(float f_start, float f_end, float duration, float t)
{
if (t > duration) {
return 0.f;
}
float w_start = f_start * M_TWOPI_F;
float w_end = f_end * M_TWOPI_F;
if (f_start > f_end) {
// Handle high-to-low sweep correctly
w_start = f_end * M_TWOPI_F;
w_end = f_start * M_TWOPI_F;
t = duration - t;
}
return sinf(t * powf(10.f, log10f(w_start) + (log10f(w_end) - log10f(w_start)) * t / duration));
}
} /* namespace signal_generator */