/* ========================================
 *  FathomFive - FathomFive.h
 *  Copyright (c) 2016 airwindows, All rights reserved
 * ======================================== */

#ifndef __FathomFive_H
#include "FathomFive.h"
#endif

void FathomFive::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames) 
{
    float* in1  =  inputs[0];
    float* in2  =  inputs[1];
    float* out1 = outputs[0];
    float* out2 = outputs[1];

	double EQ = 0.01+((pow(C,4) / getSampleRate())*32000.0);
	double dcblock = EQ / 320.0;
	double wet = D*2.0;
	double dry = 2.0 - wet;
	double bridgerectifier;
	double tempL;
	double tempR;
	double basstrim = (0.01/EQ)+1.0;
	if (wet > 1.0) wet = 1.0;
	if (dry > 1.0) dry = 1.0;
	
	long double inputSampleL;
	long double inputSampleR;
	    
    while (--sampleFrames >= 0)
    {
		inputSampleL = *in1;
		inputSampleR = *in2;
		if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
			static int noisesource = 0;
			//this declares a variable before anything else is compiled. It won't keep assigning
			//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
			//but it lets me add this denormalization fix in a single place rather than updating
			//it in three different locations. The variable isn't thread-safe but this is only
			//a random seed and we can share it with whatever.
			noisesource = noisesource % 1700021; noisesource++;
			int residue = noisesource * noisesource;
			residue = residue % 170003; residue *= residue;
			residue = residue % 17011; residue *= residue;
			residue = residue % 1709; residue *= residue;
			residue = residue % 173; residue *= residue;
			residue = residue % 17;
			double applyresidue = residue;
			applyresidue *= 0.00000001;
			applyresidue *= 0.00000001;
			inputSampleL = applyresidue;
		}
		if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
			static int noisesource = 0;
			noisesource = noisesource % 1700021; noisesource++;
			int residue = noisesource * noisesource;
			residue = residue % 170003; residue *= residue;
			residue = residue % 17011; residue *= residue;
			residue = residue % 1709; residue *= residue;
			residue = residue % 173; residue *= residue;
			residue = residue % 17;
			double applyresidue = residue;
			applyresidue *= 0.00000001;
			applyresidue *= 0.00000001;
			inputSampleR = applyresidue;
			//this denormalization routine produces a white noise at -300 dB which the noise
			//shaping will interact with to produce a bipolar output, but the noise is actually
			//all positive. That should stop any variables from going denormal, and the routine
			//only kicks in if digital black is input. As a final touch, if you save to 24-bit
			//the silence will return to being digital black again.
		}

		if (inputSampleL > 0)
		{if (WasNegativeL){SubOctaveL = !SubOctaveL;} WasNegativeL = false;}
		else {WasNegativeL = true;}
		if (inputSampleR > 0)
		{if (WasNegativeR){SubOctaveR = !SubOctaveR;} WasNegativeR = false;}
		else {WasNegativeR = true;}
		
		iirSampleLD = (iirSampleLD * (1 - EQ)) + (inputSampleL * EQ);
		bridgerectifier = fabs(iirSampleLD);
		if (SubOctaveL) tempL = bridgerectifier*B;
		else tempL = -bridgerectifier*B;
		iirSampleRD = (iirSampleRD * (1 - EQ)) + (inputSampleR * EQ);
		bridgerectifier = fabs(iirSampleRD);
		if (SubOctaveR) tempR = bridgerectifier*B;
		else tempR = -bridgerectifier*B;
		
		tempL += (inputSampleL*A);
		tempR += (inputSampleR*A);
		
		iirSampleLA += (tempL * EQ);
		iirSampleLA -= (iirSampleLA * iirSampleLA * iirSampleLA * EQ);
		if (iirSampleLA > 0) iirSampleLA -= dcblock;
		else iirSampleLA += dcblock;
		tempL = iirSampleLA*basstrim;

		iirSampleRA += (tempR * EQ);
		iirSampleRA -= (iirSampleRA * iirSampleRA * iirSampleRA * EQ);
		if (iirSampleRA > 0) iirSampleRA -= dcblock;
		else iirSampleRA += dcblock;
		tempR = iirSampleRA*basstrim;
		
		iirSampleLB = (iirSampleLB * (1 - EQ)) + (tempL * EQ);
		tempL = iirSampleLB;
		iirSampleRB = (iirSampleRB * (1 - EQ)) + (tempR * EQ);
		tempR = iirSampleRB;
		
		iirSampleLC = (iirSampleLC * (1 - EQ)) + (tempL * EQ);
		tempL = iirSampleLC;
		iirSampleRC = (iirSampleRC * (1 - EQ)) + (tempR * EQ);
		tempR = iirSampleRC;
		
        inputSampleL = (inputSampleL*dry) + (tempL*wet);
        inputSampleR = (inputSampleR*dry) + (tempR*wet);
		
		*out1 = inputSampleL;
		*out2 = inputSampleR;

		*in1++;
		*in2++;
		*out1++;
		*out2++;
    }
}

void FathomFive::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames) 
{
    double* in1  =  inputs[0];
    double* in2  =  inputs[1];
    double* out1 = outputs[0];
    double* out2 = outputs[1];

	double EQ = 0.01+((pow(C,4) / getSampleRate())*32000.0);
	double dcblock = EQ / 320.0;
	double wet = D*2.0;
	double dry = 2.0 - wet;
	double bridgerectifier;
	double tempL;
	double tempR;
	double basstrim = (0.01/EQ)+1.0;
	if (wet > 1.0) wet = 1.0;
	if (dry > 1.0) dry = 1.0;
	
	long double inputSampleL;
	long double inputSampleR;
	
    while (--sampleFrames >= 0)
    {
		inputSampleL = *in1;
		inputSampleR = *in2;
		if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
			static int noisesource = 0;
			//this declares a variable before anything else is compiled. It won't keep assigning
			//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
			//but it lets me add this denormalization fix in a single place rather than updating
			//it in three different locations. The variable isn't thread-safe but this is only
			//a random seed and we can share it with whatever.
			noisesource = noisesource % 1700021; noisesource++;
			int residue = noisesource * noisesource;
			residue = residue % 170003; residue *= residue;
			residue = residue % 17011; residue *= residue;
			residue = residue % 1709; residue *= residue;
			residue = residue % 173; residue *= residue;
			residue = residue % 17;
			double applyresidue = residue;
			applyresidue *= 0.00000001;
			applyresidue *= 0.00000001;
			inputSampleL = applyresidue;
		}
		if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
			static int noisesource = 0;
			noisesource = noisesource % 1700021; noisesource++;
			int residue = noisesource * noisesource;
			residue = residue % 170003; residue *= residue;
			residue = residue % 17011; residue *= residue;
			residue = residue % 1709; residue *= residue;
			residue = residue % 173; residue *= residue;
			residue = residue % 17;
			double applyresidue = residue;
			applyresidue *= 0.00000001;
			applyresidue *= 0.00000001;
			inputSampleR = applyresidue;
			//this denormalization routine produces a white noise at -300 dB which the noise
			//shaping will interact with to produce a bipolar output, but the noise is actually
			//all positive. That should stop any variables from going denormal, and the routine
			//only kicks in if digital black is input. As a final touch, if you save to 24-bit
			//the silence will return to being digital black again.
		}
		
		if (inputSampleL > 0)
		{if (WasNegativeL){SubOctaveL = !SubOctaveL;} WasNegativeL = false;}
		else {WasNegativeL = true;}
		if (inputSampleR > 0)
		{if (WasNegativeR){SubOctaveR = !SubOctaveR;} WasNegativeR = false;}
		else {WasNegativeR = true;}
		
		iirSampleLD = (iirSampleLD * (1 - EQ)) + (inputSampleL * EQ);
		bridgerectifier = fabs(iirSampleLD);
		if (SubOctaveL) tempL = bridgerectifier*B;
		else tempL = -bridgerectifier*B;
		iirSampleRD = (iirSampleRD * (1 - EQ)) + (inputSampleR * EQ);
		bridgerectifier = fabs(iirSampleRD);
		if (SubOctaveR) tempR = bridgerectifier*B;
		else tempR = -bridgerectifier*B;
		
		tempL += (inputSampleL*A);
		tempR += (inputSampleR*A);
		
		iirSampleLA += (tempL * EQ);
		iirSampleLA -= (iirSampleLA * iirSampleLA * iirSampleLA * EQ);
		if (iirSampleLA > 0) iirSampleLA -= dcblock;
		else iirSampleLA += dcblock;
		tempL = iirSampleLA*basstrim;
		
		iirSampleRA += (tempR * EQ);
		iirSampleRA -= (iirSampleRA * iirSampleRA * iirSampleRA * EQ);
		if (iirSampleRA > 0) iirSampleRA -= dcblock;
		else iirSampleRA += dcblock;
		tempR = iirSampleRA*basstrim;
		
		iirSampleLB = (iirSampleLB * (1 - EQ)) + (tempL * EQ);
		tempL = iirSampleLB;
		iirSampleRB = (iirSampleRB * (1 - EQ)) + (tempR * EQ);
		tempR = iirSampleRB;
		
		iirSampleLC = (iirSampleLC * (1 - EQ)) + (tempL * EQ);
		tempL = iirSampleLC;
		iirSampleRC = (iirSampleRC * (1 - EQ)) + (tempR * EQ);
		tempR = iirSampleRC;
		
        inputSampleL = (inputSampleL*dry) + (tempL*wet);
        inputSampleR = (inputSampleR*dry) + (tempR*wet);
		
		*out1 = inputSampleL;
		*out2 = inputSampleR;

		*in1++;
		*in2++;
		*out1++;
		*out2++;
    }
}