/* ========================================
 *  Melt - Melt.h
 *  Copyright (c) 2016 airwindows, Airwindows uses the MIT license
 * ======================================== */

#ifndef __Melt_H
#include "Melt.h"
#endif

void Melt::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames) 
{
    float* in1  =  inputs[0];
    float* in2  =  inputs[1];
    float* out1 = outputs[0];
    float* out2 = outputs[1];
	
	double rate = 1 / (pow(A,2) + 0.001);
	double depthB = (B * 139.5)+2;
	double depthA = depthB * (1.0 - A);
	double output = C * 0.05;
	double wet = D;
	double dry = 1.0-wet;	


	double inputSampleL;
	double inputSampleR;
	double drySampleL;
	double drySampleR;
	
	minTap[0] = floor(2 * depthA); maxTap[0] = floor(2 * depthB);
	minTap[1] = floor(3 * depthA); maxTap[1] = floor(3 * depthB);
	minTap[2] = floor(5 * depthA); maxTap[2] = floor(5 * depthB);
	minTap[3] = floor(7 * depthA); maxTap[3] = floor(7 * depthB);
	minTap[4] = floor(11 * depthA); maxTap[4] = floor(11 * depthB);
	minTap[5] = floor(13 * depthA); maxTap[5] = floor(13 * depthB);
	minTap[6] = floor(17 * depthA); maxTap[6] = floor(17 * depthB);
	minTap[7] = floor(19 * depthA); maxTap[7] = floor(19 * depthB);
	minTap[8] = floor(23 * depthA); maxTap[8] = floor(23 * depthB);
	minTap[9] = floor(29 * depthA); maxTap[9] = floor(29 * depthB);
	minTap[10] = floor(31 * depthA); maxTap[10] = floor(31 * depthB);
	minTap[11] = floor(37 * depthA); maxTap[11] = floor(37 * depthB);
	minTap[12] = floor(41 * depthA); maxTap[12] = floor(41 * depthB);
	minTap[13] = floor(43 * depthA); maxTap[13] = floor(43 * depthB);
	minTap[14] = floor(47 * depthA); maxTap[14] = floor(47 * depthB);
	minTap[15] = floor(53 * depthA); maxTap[15] = floor(53 * depthB);
	minTap[16] = floor(59 * depthA); maxTap[16] = floor(59 * depthB);
	minTap[17] = floor(61 * depthA); maxTap[17] = floor(61 * depthB);
	minTap[18] = floor(67 * depthA); maxTap[18] = floor(67 * depthB);
	minTap[19] = floor(71 * depthA); maxTap[19] = floor(71 * depthB);
	minTap[20] = floor(73 * depthA); maxTap[20] = floor(73 * depthB);
	minTap[21] = floor(79 * depthA); maxTap[21] = floor(79 * depthB);
	minTap[22] = floor(83 * depthA); maxTap[22] = floor(83 * depthB);
	minTap[23] = floor(89 * depthA); maxTap[23] = floor(89 * depthB);
	minTap[24] = floor(97 * depthA); maxTap[24] = floor(97 * depthB);
	minTap[25] = floor(101 * depthA); maxTap[25] = floor(101 * depthB);
	minTap[26] = floor(103 * depthA); maxTap[26] = floor(103 * depthB);
	minTap[27] = floor(107 * depthA); maxTap[27] = floor(107 * depthB);
	minTap[28] = floor(109 * depthA); maxTap[28] = floor(109 * depthB);
	minTap[29] = floor(113 * depthA); maxTap[29] = floor(113 * depthB);
	minTap[30] = floor(117 * depthA); maxTap[30] = floor(117 * depthB);	
    
    while (--sampleFrames >= 0)
    {
		inputSampleL = *in1;
		inputSampleR = *in2;
		if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
		if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
		drySampleL = inputSampleL;
		drySampleR = inputSampleR;

		if (gcount < 0 || gcount > 16000) {gcount = 16000;}
		dL[gcount+16000] = dL[gcount] = inputSampleL;
		dR[gcount+16000] = dR[gcount] = inputSampleR;
		
		if (slowCount > rate || slowCount < 0) {
			slowCount = 0;
			stepCount++;
			if (stepCount > 29 || stepCount < 0) {stepCount = 0;}
			position[stepCount] += stepTap[stepCount];
			if (position[stepCount] < minTap[stepCount]) {
				position[stepCount] = minTap[stepCount];
				stepTap[stepCount] = 1;
			}
			if (position[stepCount] > maxTap[stepCount]) {
				position[stepCount] = maxTap[stepCount];
				stepTap[stepCount] = -1;
			}
		}
		
		//begin L
		scalefactorL *= 0.9999;
		scalefactorL += (100.0 - fabs(combineL)) * 0.000001;
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[29]]);
		combineL += (dL[gcount+position[28]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[27]]);
		combineL += (dL[gcount+position[26]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[25]]);
		combineL += (dL[gcount+position[24]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[23]]);
		combineL += (dL[gcount+position[22]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[21]]);
		combineL += (dL[gcount+position[20]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[19]]);
		combineL += (dL[gcount+position[18]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[17]]);
		combineL += (dL[gcount+position[16]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[15]]);
		combineL += (dL[gcount+position[14]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[13]]);
		combineL += (dL[gcount+position[12]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[11]]);
		combineL += (dL[gcount+position[10]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[9]]);
		combineL += (dL[gcount+position[8]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[7]]);
		combineL += (dL[gcount+position[6]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[5]]);
		combineL += (dL[gcount+position[4]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[3]]);
		combineL += (dL[gcount+position[2]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[1]]);
		combineL += (dL[gcount+position[0]]);
		
		inputSampleL = combineL;
		//done with L
		
		//begin R
		scalefactorR *= 0.9999;
		scalefactorR += (100.0 - fabs(combineR)) * 0.000001;
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[29]]);
		combineR += (dR[gcount+position[28]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[27]]);
		combineR += (dR[gcount+position[26]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[25]]);
		combineR += (dR[gcount+position[24]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[23]]);
		combineR += (dR[gcount+position[22]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[21]]);
		combineR += (dR[gcount+position[20]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[19]]);
		combineR += (dR[gcount+position[18]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[17]]);
		combineR += (dR[gcount+position[16]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[15]]);
		combineR += (dR[gcount+position[14]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[13]]);
		combineR += (dR[gcount+position[12]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[11]]);
		combineR += (dR[gcount+position[10]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[9]]);
		combineR += (dR[gcount+position[8]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[7]]);
		combineR += (dR[gcount+position[6]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[5]]);
		combineR += (dR[gcount+position[4]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[3]]);
		combineR += (dR[gcount+position[2]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[1]]);
		combineR += (dR[gcount+position[0]]);
		
		inputSampleR = combineR;
		//done with R
		
		gcount--;
		slowCount++;

		if (output < 1.0) {inputSampleL *= output; inputSampleR *= output;}
		if (wet < 1.0) {
			inputSampleL = (drySampleL * dry)+(inputSampleL*wet);
			inputSampleR = (drySampleR * dry)+(inputSampleR*wet);
		}
		//nice little output stage template: if we have another scale of floating point
		//number, we really don't want to meaninglessly multiply that by 1.0.
				
		//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 Melt::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames) 
{
    double* in1  =  inputs[0];
    double* in2  =  inputs[1];
    double* out1 = outputs[0];
    double* out2 = outputs[1];
	
	double rate = 1 / (pow(A,2) + 0.001);
	double depthB = (B * 139.5)+2;
	double depthA = depthB * (1.0 - A);
	double output = C * 0.05;
	double wet = D;
	double dry = 1.0-wet;	
	

	double inputSampleL;
	double inputSampleR;
	double drySampleL;
	double drySampleR;
	
	minTap[0] = floor(2 * depthA); maxTap[0] = floor(2 * depthB);
	minTap[1] = floor(3 * depthA); maxTap[1] = floor(3 * depthB);
	minTap[2] = floor(5 * depthA); maxTap[2] = floor(5 * depthB);
	minTap[3] = floor(7 * depthA); maxTap[3] = floor(7 * depthB);
	minTap[4] = floor(11 * depthA); maxTap[4] = floor(11 * depthB);
	minTap[5] = floor(13 * depthA); maxTap[5] = floor(13 * depthB);
	minTap[6] = floor(17 * depthA); maxTap[6] = floor(17 * depthB);
	minTap[7] = floor(19 * depthA); maxTap[7] = floor(19 * depthB);
	minTap[8] = floor(23 * depthA); maxTap[8] = floor(23 * depthB);
	minTap[9] = floor(29 * depthA); maxTap[9] = floor(29 * depthB);
	minTap[10] = floor(31 * depthA); maxTap[10] = floor(31 * depthB);
	minTap[11] = floor(37 * depthA); maxTap[11] = floor(37 * depthB);
	minTap[12] = floor(41 * depthA); maxTap[12] = floor(41 * depthB);
	minTap[13] = floor(43 * depthA); maxTap[13] = floor(43 * depthB);
	minTap[14] = floor(47 * depthA); maxTap[14] = floor(47 * depthB);
	minTap[15] = floor(53 * depthA); maxTap[15] = floor(53 * depthB);
	minTap[16] = floor(59 * depthA); maxTap[16] = floor(59 * depthB);
	minTap[17] = floor(61 * depthA); maxTap[17] = floor(61 * depthB);
	minTap[18] = floor(67 * depthA); maxTap[18] = floor(67 * depthB);
	minTap[19] = floor(71 * depthA); maxTap[19] = floor(71 * depthB);
	minTap[20] = floor(73 * depthA); maxTap[20] = floor(73 * depthB);
	minTap[21] = floor(79 * depthA); maxTap[21] = floor(79 * depthB);
	minTap[22] = floor(83 * depthA); maxTap[22] = floor(83 * depthB);
	minTap[23] = floor(89 * depthA); maxTap[23] = floor(89 * depthB);
	minTap[24] = floor(97 * depthA); maxTap[24] = floor(97 * depthB);
	minTap[25] = floor(101 * depthA); maxTap[25] = floor(101 * depthB);
	minTap[26] = floor(103 * depthA); maxTap[26] = floor(103 * depthB);
	minTap[27] = floor(107 * depthA); maxTap[27] = floor(107 * depthB);
	minTap[28] = floor(109 * depthA); maxTap[28] = floor(109 * depthB);
	minTap[29] = floor(113 * depthA); maxTap[29] = floor(113 * depthB);
	minTap[30] = floor(117 * depthA); maxTap[30] = floor(117 * depthB);	

    while (--sampleFrames >= 0)
    {
		inputSampleL = *in1;
		inputSampleR = *in2;
		if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
		if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
		drySampleL = inputSampleL;
		drySampleR = inputSampleR;
		
		if (gcount < 0 || gcount > 16000) {gcount = 16000;}
		dL[gcount+16000] = dL[gcount] = inputSampleL;
		dR[gcount+16000] = dR[gcount] = inputSampleR;
		
		if (slowCount > rate || slowCount < 0) {
			slowCount = 0;
			stepCount++;
			if (stepCount > 29 || stepCount < 0) {stepCount = 0;}
			position[stepCount] += stepTap[stepCount];
			if (position[stepCount] < minTap[stepCount]) {
				position[stepCount] = minTap[stepCount];
				stepTap[stepCount] = 1;
			}
			if (position[stepCount] > maxTap[stepCount]) {
				position[stepCount] = maxTap[stepCount];
				stepTap[stepCount] = -1;
			}
		}
		
		//begin L
		scalefactorL *= 0.9999;
		scalefactorL += (100.0 - fabs(combineL)) * 0.000001;
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[29]]);
		combineL += (dL[gcount+position[28]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[27]]);
		combineL += (dL[gcount+position[26]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[25]]);
		combineL += (dL[gcount+position[24]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[23]]);
		combineL += (dL[gcount+position[22]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[21]]);
		combineL += (dL[gcount+position[20]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[19]]);
		combineL += (dL[gcount+position[18]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[17]]);
		combineL += (dL[gcount+position[16]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[15]]);
		combineL += (dL[gcount+position[14]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[13]]);
		combineL += (dL[gcount+position[12]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[11]]);
		combineL += (dL[gcount+position[10]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[9]]);
		combineL += (dL[gcount+position[8]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[7]]);
		combineL += (dL[gcount+position[6]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[5]]);
		combineL += (dL[gcount+position[4]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[3]]);
		combineL += (dL[gcount+position[2]]);
		
		combineL *= scalefactorL;
		combineL -= (dL[gcount+position[1]]);
		combineL += (dL[gcount+position[0]]);
		
		inputSampleL = combineL;
		//done with L
		
		//begin R
		scalefactorR *= 0.9999;
		scalefactorR += (100.0 - fabs(combineR)) * 0.000001;
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[29]]);
		combineR += (dR[gcount+position[28]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[27]]);
		combineR += (dR[gcount+position[26]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[25]]);
		combineR += (dR[gcount+position[24]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[23]]);
		combineR += (dR[gcount+position[22]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[21]]);
		combineR += (dR[gcount+position[20]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[19]]);
		combineR += (dR[gcount+position[18]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[17]]);
		combineR += (dR[gcount+position[16]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[15]]);
		combineR += (dR[gcount+position[14]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[13]]);
		combineR += (dR[gcount+position[12]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[11]]);
		combineR += (dR[gcount+position[10]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[9]]);
		combineR += (dR[gcount+position[8]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[7]]);
		combineR += (dR[gcount+position[6]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[5]]);
		combineR += (dR[gcount+position[4]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[3]]);
		combineR += (dR[gcount+position[2]]);
		
		combineR *= scalefactorR;
		combineR -= (dR[gcount+position[1]]);
		combineR += (dR[gcount+position[0]]);
		
		inputSampleR = combineR;
		//done with R
		
		gcount--;
		slowCount++;
		
		if (output < 1.0) {inputSampleL *= output; inputSampleR *= output;}
		if (wet < 1.0) {
			inputSampleL = (drySampleL * dry)+(inputSampleL*wet);
			inputSampleR = (drySampleR * dry)+(inputSampleR*wet);
		}
		//nice little output stage template: if we have another scale of floating point
		//number, we really don't want to meaninglessly multiply that by 1.0.		

		//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++;
    }
}