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feat(filter): Add modulation support and LFO integration

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This commit is contained in:
Liam Kerr 2026-08-06 00:03:43 +01:00
parent 3c3fec9b90
commit fe594a5494
6 changed files with 131 additions and 20 deletions
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16
plugins/SquidgeFilter/SquidgeFilter.cpp
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@ -3,9 +3,12 @@
#include "DistrhoPluginInfo.h"
#include "../../core/Filter.hpp"
#include "../../core/Oscillator.hpp"
START_NAMESPACE_DISTRHO
const int BUFFER_SIZE = 16384;
class SquidgeFilter : public Plugin {
public:
@ -17,8 +20,8 @@ public:
};
SquidgeFilter() // Note: Constructor name must match class name
: Plugin(kParameterCount, 0, 0),
filter_(1000.0f, 0.707f, 48000.0f) { // Default: 1kHz, Q=0.707
: Plugin(kParameterCount, 0, 0), filter_(1000.0f, 0.707f, 48000.0f),
lfo_(4.0f) { // Default: 1kHz, Q=0.707
filter_.setType(Filter::kLowPass);
}
@ -94,7 +97,6 @@ protected:
filter_.setQ(value);
break;
case kParamType:
// Clamp value to valid enum range
int typeIdx = static_cast<int>(std::fmin(std::fmax(value, 0.0f), 3.0f));
filter_.setType(static_cast<Filter::FilterType>(typeIdx));
break;
@ -102,15 +104,21 @@ protected:
}
void run(const float **inputs, float **outputs, uint32_t frames) override {
filter_.processStereo(inputs[0], inputs[1], outputs[0], outputs[1], frames);
lfo_.process(lfoBuffer_, frames);
filter_.processStereo(inputs[0], inputs[1], outputs[0], outputs[1], frames,
lfoBuffer_);
}
void sampleRateChanged(double newSr) override {
filter_.setSampleRate(static_cast<float>(newSr));
lfo_.setSampleRate(newSr);
}
private:
Filter filter_;
Oscillator lfo_;
float lfoBuffer_[BUFFER_SIZE];
DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(SquidgeFilter);
};