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32 lines
755 B
32 lines
755 B
4 years ago
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#include "../utility/dsp.h"
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#include "overdrive.h"
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#include <algorithm>
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namespace daisysp
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{
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void Overdrive::Init()
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{
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SetDrive(.5f);
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}
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float Overdrive::Process(float in)
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{
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float pre = pre_gain_ * in;
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return SoftClip(pre) * post_gain_;
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}
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void Overdrive::SetDrive(float drive)
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{
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drive = fclamp(drive, 0.f, 1.f);
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drive_ = 2.f * drive;
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const float drive_2 = drive_ * drive_;
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const float pre_gain_a = drive_ * 0.5f;
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const float pre_gain_b = drive_2 * drive_2 * drive_ * 24.0f;
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pre_gain_ = pre_gain_a + (pre_gain_b - pre_gain_a) * drive_2;
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const float drive_squashed = drive_ * (2.0f - drive_);
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post_gain_ = 1.0f / SoftClip(0.33f + drive_squashed * (pre_gain_ - 0.33f));
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}
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} // namespace daisysp
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