initial commit

2023-07-07 10:07:53 +02:00
commit ad8c3fbe74
18 changed files with 3554 additions and 0 deletions
--- a/clip/aw_cliponly2.h
+++ b/clip/aw_cliponly2.h
@@ -0,0 +1,100 @@
+#pragma once
+#include <cstdlib>
+
+namespace trnr::lib::clip {
+// Clipper based on ClipOnly2 by Chris Johnson
+class aw_cliponly2 {
+public:
+    aw_cliponly2() {
+        samplerate = 44100;
+
+        lastSampleL = 0.0;
+        wasPosClipL = false;
+        wasNegClipL = false;
+        lastSampleR = 0.0;
+        wasPosClipR = false;
+        wasNegClipR = false;
+        for (int x = 0; x < 16; x++) {intermediateL[x] = 0.0; intermediateR[x] = 0.0;}
+        //this is reset: values being initialized only once. Startup values, whatever they are.
+    }
+
+    void set_samplerate(double _samplerate) {
+        samplerate = _samplerate;
+    }
+
+    void process_block(double** inputs, double** outputs, long sample_frames) {
+        double* in1  =  inputs[0];
+        double* in2  =  inputs[1];
+        double* out1 = outputs[0];
+        double* out2 = outputs[1];
+
+        double overallscale = 1.0;
+        overallscale /= 44100.0;
+        overallscale *= samplerate;
+        
+        int spacing = floor(overallscale); //should give us working basic scaling, usually 2 or 4
+        if (spacing < 1) spacing = 1; if (spacing > 16) spacing = 16;
+        
+        while (--sample_frames >= 0)
+        {
+            double inputSampleL = *in1;
+            double inputSampleR = *in2;
+            
+            //begin ClipOnly2 stereo as a little, compressed chunk that can be dropped into code
+            if (inputSampleL > 4.0) inputSampleL = 4.0; if (inputSampleL < -4.0) inputSampleL = -4.0;
+            if (wasPosClipL == true) { //current will be over
+                if (inputSampleL<lastSampleL) lastSampleL=0.7058208+(inputSampleL*0.2609148);
+                else lastSampleL = 0.2491717+(lastSampleL*0.7390851);
+            } wasPosClipL = false;
+            if (inputSampleL>0.9549925859) {wasPosClipL=true;inputSampleL=0.7058208+(lastSampleL*0.2609148);}
+            if (wasNegClipL == true) { //current will be -over
+                if (inputSampleL > lastSampleL) lastSampleL=-0.7058208+(inputSampleL*0.2609148);
+                else lastSampleL=-0.2491717+(lastSampleL*0.7390851);
+            } wasNegClipL = false;
+            if (inputSampleL<-0.9549925859) {wasNegClipL=true;inputSampleL=-0.7058208+(lastSampleL*0.2609148);}
+            intermediateL[spacing] = inputSampleL;
+            inputSampleL = lastSampleL; //Latency is however many samples equals one 44.1k sample
+            for (int x = spacing; x > 0; x--) intermediateL[x-1] = intermediateL[x];
+            lastSampleL = intermediateL[0]; //run a little buffer to handle this
+            
+            if (inputSampleR > 4.0) inputSampleR = 4.0; if (inputSampleR < -4.0) inputSampleR = -4.0;
+            if (wasPosClipR == true) { //current will be over
+                if (inputSampleR<lastSampleR) lastSampleR=0.7058208+(inputSampleR*0.2609148);
+                else lastSampleR = 0.2491717+(lastSampleR*0.7390851);
+            } wasPosClipR = false;
+            if (inputSampleR>0.9549925859) {wasPosClipR=true;inputSampleR=0.7058208+(lastSampleR*0.2609148);}
+            if (wasNegClipR == true) { //current will be -over
+                if (inputSampleR > lastSampleR) lastSampleR=-0.7058208+(inputSampleR*0.2609148);
+                else lastSampleR=-0.2491717+(lastSampleR*0.7390851);
+            } wasNegClipR = false;
+            if (inputSampleR<-0.9549925859) {wasNegClipR=true;inputSampleR=-0.7058208+(lastSampleR*0.2609148);}
+            intermediateR[spacing] = inputSampleR;
+            inputSampleR = lastSampleR; //Latency is however many samples equals one 44.1k sample
+            for (int x = spacing; x > 0; x--) intermediateR[x-1] = intermediateR[x];
+            lastSampleR = intermediateR[0]; //run a little buffer to handle this
+            //end ClipOnly2 stereo as a little, compressed chunk that can be dropped into code
+            
+            *out1 = inputSampleL;
+            *out2 = inputSampleR;
+
+            in1++;
+            in2++;
+            out1++;
+            out2++;
+        }
+    }
+
+private:
+    double samplerate;
+
+    double lastSampleL;
+	double intermediateL[16];
+	bool wasPosClipL;
+	bool wasNegClipL;
+	double lastSampleR;
+	double intermediateR[16];
+	bool wasPosClipR;
+	bool wasNegClipR; //Stereo ClipOnly2
+	//default stuff
+};
+}