52 lines
932 B
C++
52 lines
932 B
C++
#pragma once
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namespace trnr {
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class wavefolder {
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public:
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float amount = 1.f;
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void process_sample(float& _sample)
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{
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if (amount > 1.f) { _sample = fold(_sample * amount); }
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}
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private:
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// folds the wave from -1 to 1
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float fold(float _sample)
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{
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while (_sample > 1.0 || _sample < -1.0) {
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if (_sample > 1.0) {
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_sample = 2.0 - _sample;
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} else if (_sample < -1.0) {
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_sample = -2.0 - _sample;
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}
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}
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return _sample;
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}
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// folds the positive part of the wave independently from the negative part.
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float fold_bipolar(float _sample)
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{
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// fold positive values
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if (_sample > 1.0) {
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_sample = 2.0 - _sample;
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if (_sample < 0.0) { _sample = -_sample; }
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return fold(_sample);
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}
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// fold negative values
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else if (_sample < -1.0) {
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_sample = -2.0 - _sample;
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if (_sample > 0.0) { _sample = -_sample; }
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return fold(_sample);
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} else {
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return _sample;
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}
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}
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};
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}; // namespace trnr
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