text: /* ========================================
   *  ElectroHat - ElectroHat.h
   *  Copyright (c) 2016 airwindows, All rights reserved
   * ======================================== */
  
  #ifndef __ElectroHat_H
  #include "ElectroHat.h"
  #endif
  
  void ElectroHat::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames) 
  {
      float* in1  =  inputs[0];
      float* in2  =  inputs[1];
      float* out1 = outputs[0];
      float* out2 = outputs[1];
  	
  	double overallscale = 1.0;
  	overallscale /= 44100.0;
  	overallscale *= getSampleRate();
  	bool highSample = false;
  	if (getSampleRate() > 64000) highSample = true;
  	//we will go to another dither for 88 and 96K
  
  	double drySampleL;
  	double drySampleR;
  	double tempSampleL;
  	double tempSampleR;
  	double inputSampleL;
  	double inputSampleR;
  	
  	int deSyn = (VstInt32)( A * 5.999 )+1;
  	double increment = B;
  	double brighten = C;
  	double outputlevel = D;
  	double wet = E;
  	
  	if (deSyn == 4) {deSyn = 1; increment = 0.411; brighten = 0.87;}
  	//606 preset
  	if (deSyn == 5) {deSyn = 2; increment = 0.111; brighten = 1.0;}
  	//808 preset
  	if (deSyn == 6) {deSyn = 2; increment = 0.299; brighten = 0.359;}
  	//909 preset
  	int tok = deSyn + 1;
  	increment *= 0.98;
  	increment += 0.01;
  	increment += (double)tok;
  	double fosA = increment;
  	double fosB = fosA * increment;
  	double fosC = fosB * increment;
  	double fosD = fosC * increment;
  	double fosE = fosD * increment;
  	double fosF = fosE * increment;
  	int posA = fosA;
  	int posB = fosB;
  	int posC = fosC;
  	int posD = fosD;
  	int posE = fosE;
  	int posF = fosF;
  	int posG = posF*posE*posD*posC*posB; //factorial
      
      while (--sampleFrames >= 0)
      {
  		inputSampleL = *in1;
  		inputSampleR = *in2;
  		drySampleL = inputSampleL;
  		drySampleR = inputSampleR;
  		
  		inputSampleL = fabs(inputSampleL)*outputlevel;
  		inputSampleR = fabs(inputSampleR)*outputlevel;
  		
  		if (flip) { //will always be true unless we have high sample rate
  			tik++;
  			tik = tik % posG;		
  			tok = tik * tik; tok = tok % posF;
  			tok *= tok; tok = tok % posE;
  			tok *= tok; tok = tok % posD;
  			tok *= tok; tok = tok % posC;
  			tok *= tok; tok = tok % posB;
  			tok *= tok; tok = tok % posA;
  			
  			inputSampleL = tok*inputSampleL;
  			if ((abs(lok-tok)<abs(lok+tok))&&(deSyn == 1)) {inputSampleL = -tok*inputSampleL;}		
  			if ((abs(lok-tok)>abs(lok+tok))&&(deSyn == 2)) {inputSampleL = -tok*inputSampleL;}
  			if ((abs(lok-tok)<abs(lok+tok))&&(deSyn == 3)) {inputSampleL = -tok*inputSampleL;}
  
  			inputSampleR = tok*inputSampleR;
  			if ((abs(lok-tok)<abs(lok+tok))&&(deSyn == 1)) {inputSampleR = -tok*inputSampleR;}		
  			if ((abs(lok-tok)>abs(lok+tok))&&(deSyn == 2)) {inputSampleR = -tok*inputSampleR;}
  			if ((abs(lok-tok)<abs(lok+tok))&&(deSyn == 3)) {inputSampleR = -tok*inputSampleR;}
  
  			lok = tok;
  
  			tempSampleL = inputSampleL;
  			inputSampleL = inputSampleL - (lastSampleL*brighten);
  			lastSampleL = tempSampleL;
  
  			tempSampleR = inputSampleR;
  			inputSampleR = inputSampleR - (lastSampleR*brighten);
  			lastSampleR = tempSampleR;
  		} else { //we have high sample rate and this is an interpolate sample
  			inputSampleL = lastSampleL;
  			inputSampleR = lastSampleR;
  			//not really interpolating, just sample-and-hold
  		}
  		
  		if (highSample) {
  			flip = !flip;
  		} else {
  			flip = true;
  		}
  		
  		tempSampleL = inputSampleL;
  		inputSampleL += storedSampleL;
  		storedSampleL = tempSampleL;
  
  		tempSampleR = inputSampleR;
  		inputSampleR += storedSampleR;
  		storedSampleR = tempSampleR;
  		
  		if (wet !=1.0) {
  			inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
  			inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
  		}		
  		
  		//begin 32 bit stereo floating point dither
  		int expon; frexpf((float)inputSampleL, &expon);
  		fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
  		inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
  		frexpf((float)inputSampleR, &expon);
  		fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
  		inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
  		//end 32 bit stereo floating point dither
  
  		*out1 = inputSampleL;
  		*out2 = inputSampleR;
  
  		*in1++;
  		*in2++;
  		*out1++;
  		*out2++;
      }
  }
  
  void ElectroHat::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames) 
  {
      double* in1  =  inputs[0];
      double* in2  =  inputs[1];
      double* out1 = outputs[0];
      double* out2 = outputs[1];
  
  	double overallscale = 1.0;
  	overallscale /= 44100.0;
  	overallscale *= getSampleRate();
  	bool highSample = false;
  	if (getSampleRate() > 64000) highSample = true;
  	//we will go to another dither for 88 and 96K
  	
  	double drySampleL;
  	double drySampleR;
  	double tempSampleL;
  	double tempSampleR;
  	double inputSampleL;
  	double inputSampleR;
  	
  	int deSyn = (VstInt32)( A * 5.999 )+1;
  	double increment = B;
  	double brighten = C;
  	double outputlevel = D;
  	double wet = E;
  	
  	if (deSyn == 4) {deSyn = 1; increment = 0.411; brighten = 0.87;}
  	//606 preset
  	if (deSyn == 5) {deSyn = 2; increment = 0.111; brighten = 1.0;}
  	//808 preset
  	if (deSyn == 6) {deSyn = 2; increment = 0.299; brighten = 0.359;}
  	//909 preset
  	int tok = deSyn + 1;
  	increment *= 0.98;
  	increment += 0.01;
  	increment += (double)tok;
  	double fosA = increment;
  	double fosB = fosA * increment;
  	double fosC = fosB * increment;
  	double fosD = fosC * increment;
  	double fosE = fosD * increment;
  	double fosF = fosE * increment;
  	int posA = fosA;
  	int posB = fosB;
  	int posC = fosC;
  	int posD = fosD;
  	int posE = fosE;
  	int posF = fosF;
  	int posG = posF*posE*posD*posC*posB; //factorial
  	
      while (--sampleFrames >= 0)
      {
  		inputSampleL = *in1;
  		inputSampleR = *in2;
  		drySampleL = inputSampleL;
  		drySampleR = inputSampleR;
  		
  		inputSampleL = fabs(inputSampleL)*outputlevel;
  		inputSampleR = fabs(inputSampleR)*outputlevel;
  		
  		if (flip) { //will always be true unless we have high sample rate
  			tik++;
  			tik = tik % posG;		
  			tok = tik * tik; tok = tok % posF;
  			tok *= tok; tok = tok % posE;
  			tok *= tok; tok = tok % posD;
  			tok *= tok; tok = tok % posC;
  			tok *= tok; tok = tok % posB;
  			tok *= tok; tok = tok % posA;
  			
  			inputSampleL = tok*inputSampleL;
  			if ((abs(lok-tok)<abs(lok+tok))&&(deSyn == 1)) {inputSampleL = -tok*inputSampleL;}		
  			if ((abs(lok-tok)>abs(lok+tok))&&(deSyn == 2)) {inputSampleL = -tok*inputSampleL;}
  			if ((abs(lok-tok)<abs(lok+tok))&&(deSyn == 3)) {inputSampleL = -tok*inputSampleL;}
  			
  			inputSampleR = tok*inputSampleR;
  			if ((abs(lok-tok)<abs(lok+tok))&&(deSyn == 1)) {inputSampleR = -tok*inputSampleR;}		
  			if ((abs(lok-tok)>abs(lok+tok))&&(deSyn == 2)) {inputSampleR = -tok*inputSampleR;}
  			if ((abs(lok-tok)<abs(lok+tok))&&(deSyn == 3)) {inputSampleR = -tok*inputSampleR;}
  			
  			lok = tok;
  			
  			tempSampleL = inputSampleL;
  			inputSampleL = inputSampleL - (lastSampleL*brighten);
  			lastSampleL = tempSampleL;
  			
  			tempSampleR = inputSampleR;
  			inputSampleR = inputSampleR - (lastSampleR*brighten);
  			lastSampleR = tempSampleR;
  		} else { //we have high sample rate and this is an interpolate sample
  			inputSampleL = lastSampleL;
  			inputSampleR = lastSampleR;
  			//not really interpolating, just sample-and-hold
  		}
  		
  		if (highSample) {
  			flip = !flip;
  		} else {
  			flip = true;
  		}
  		
  		tempSampleL = inputSampleL;
  		inputSampleL += storedSampleL;
  		storedSampleL = tempSampleL;
  		
  		tempSampleR = inputSampleR;
  		inputSampleR += storedSampleR;
  		storedSampleR = tempSampleR;
  		
  		if (wet !=1.0) {
  			inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
  			inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
  		}		
  				
  		//begin 64 bit stereo floating point dither
  		//int expon; frexp((double)inputSampleL, &expon);
  		fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
  		//inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
  		//frexp((double)inputSampleR, &expon);
  		fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
  		//inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
  		//end 64 bit stereo floating point dither
  		
  		*out1 = inputSampleL;
  		*out2 = inputSampleR;
  
  		*in1++;
  		*in2++;
  		*out1++;
  		*out2++;
      }
  }