feat: adding wave folding distortion

core/Clipper.cpp

@@ -33,5 +33,16 @@ float Clipper::clip(const float in) {
     float normalized = (in / clip_) * 0.75f;
     return std::tanh(normalized) * clip_;
   }
+  case kClipperModeFold: {
+    float x = in;
+    while (x > clip_ || x < -clip_) {
+      if (x > clip_) {
+        x = 2.0f * clip_ - x;
+      } else if (x < -clip_) {
+        x = -2.0f * clip_ - x;
+      }
+    }
+    return x;
+  }
   }
 }

core/Clipper.hpp

@@ -5,7 +5,12 @@
 
 class Clipper {
 public:
-  enum ClipperMode { kClipperModeSoft, kClipperModeHard, kClipperModeCount };
+  enum ClipperMode {
+    kClipperModeSoft,
+    kClipperModeHard,
+    kClipperModeFold,
+    kClipperModeCount
+  };
 
   Clipper(float init_clip = 1.0f, ClipperMode mode = kClipperModeSoft);
 

plugins/SquidgeDistortion/SquidgeDistortion.cpp

@@ -45,8 +45,8 @@ protected:
       parameter.hints = kParameterIsAutomatable | kParameterIsInteger;
       parameter.enumValues.count = Clipper::kClipperModeCount;
       parameter.enumValues.restrictedMode = true;
-      parameter.enumValues.values =
-          new ParameterEnumerationValue[2]{{0.0f, "Soft"}, {1.0f, "Hard"}};
+      parameter.enumValues.values = new ParameterEnumerationValue[3]{
+          {0.0f, "Soft"}, {1.0f, "Hard"}, {2.0f, "Fold"}};
       break;
     }
   }