42 lines
No EOL
1.1 KiB
C++
42 lines
No EOL
1.1 KiB
C++
#include "Clipper.hpp"
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#include <cmath>
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Clipper::Clipper(float init_clip, ClipperMode init_mode)
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: threshold_(init_clip), mode_(init_mode) {}
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void Clipper::process(const float *in, float *out, uint32_t frames) {
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for (uint32_t i = 0; i < frames; ++i) {
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out[i] = clip(in[i]);
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}
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}
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void Clipper::processStereo(const float *inLeft, const float *inRight,
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float *outLeft, float *outRight, uint32_t frames) {
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for (uint32_t i = 0; i < frames; ++i) {
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outLeft[i] = clip(inLeft[i]);
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outRight[i] = clip(inRight[i]);
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}
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}
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float Clipper::clip(const float in) {
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switch (mode_) {
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case kClipperModeHard: {
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return std::fmin(std::fmax(in, -threshold_), threshold_);
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}
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default:
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case kClipperModeSoft: {
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float normalized = (in / threshold_) * 0.75f;
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return std::tanh(normalized) * threshold_;
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}
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case kClipperModeFold: {
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float x = in;
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while (x > threshold_ || x < -threshold_) {
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if (x > threshold_) {
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x = 2.0f * threshold_ - x;
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} else if (x < -threshold_) {
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x = -2.0f * threshold_ - x;
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}
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}
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return x;
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}
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}
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} |