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Fixed DSP

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This commit is contained in:
Ryzerth
2020-11-04 00:42:39 +01:00
parent 5d320fdd53
commit 3156236745
10 changed files with 25 additions and 34 deletions
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7
core/src/dsp/window.h
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@ -6,7 +6,7 @@ namespace dsp {
class generic_window {
public:
virtual int getTapCount() { return -1; }
virtual void createTaps(float* taps, int tapCount) {}
virtual void createTaps(float* taps, int tapCount, float factor = 1.0f) {}
};
class BlackmanWindow : public filter_window::generic_window {
@ -48,7 +48,7 @@ namespace dsp {
return _M;
}
void createTaps(float* taps, int tapCount) {
void createTaps(float* taps, int tapCount, float factor = 1.0f) {
float fc = _cutoff / _sampleRate;
if (fc > 1.0f) {
fc = 1.0f;
@ -59,10 +59,11 @@ namespace dsp {
for (int i = 0; i < tapCount; i++) {
val = (sin(2.0f * FL_M_PI * fc * ((float)i - (tc / 2))) / ((float)i - (tc / 2))) *
(0.42f - (0.5f * cos(2.0f * FL_M_PI / tc)) + (0.8f * cos(4.0f * FL_M_PI / tc)));
taps[tapCount - i - 1] = val; // tapCount - i - 1
taps[i] = val; // tapCount - i - 1
sum += val;
}
for (int i = 0; i < tapCount; i++) {
taps[i] *= factor;
taps[i] /= sum;
}
}