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

#include "PodcastDeluxe.h"

#ifdef SHR3D_SFX_CORE_AIRWINDOWS

namespace airwinconsolidated::PodcastDeluxe {

void PodcastDeluxe::processBlock(float **inputs, float **outputs, int 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();
	
	int allpasstemp;
	double outallpass = 0.618033988749894848204586;
	
	double compress = 1.0+pow(A*0.8,2);
	
	double speed1 = 128.0 / pow(compress,2);
	speed1 *= overallscale;
	double speed2 = speed1 * 1.4;
	double speed3 = speed2 * 1.5;
	double speed4 = speed3 * 1.6;
	double speed5 = speed4 * 1.7;
	
	maxdelay1 = (int)(23.0*overallscale);
	maxdelay2 = (int)(19.0*overallscale);
	maxdelay3 = (int)(17.0*overallscale);
	maxdelay4 = (int)(13.0*overallscale);
	maxdelay5 = (int)(11.0*overallscale);
	//set up the prime delays
	
	double refclip = 0.999;
	double softness = 0.435;
	double invsoft = 0.56;
	double outsoft = 0.545;
	double trigger;

    while (--sampleFrames >= 0)
    {
		double inputSampleL = *in1;
		double inputSampleR = *in2;
		if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
		if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
		

		allpasstemp = tap1 - 1;
		if (allpasstemp < 0 || allpasstemp > maxdelay1) {allpasstemp = maxdelay1;}
		//set up the delay position
		//using 'tap' and 'allpasstemp' to position the tap		
		inputSampleL -= d1L[allpasstemp]*outallpass;
		d1L[tap1] = inputSampleL;
		inputSampleL *= outallpass;
		inputSampleL += (d1L[allpasstemp]);
		//allpass stage
		inputSampleR -= d1R[allpasstemp]*outallpass;
		d1R[tap1] = inputSampleR;
		inputSampleR *= outallpass;
		inputSampleR += (d1R[allpasstemp]);
		//allpass stage
		tap1--; if (tap1 < 0 || tap1 > maxdelay1) {tap1 = maxdelay1;}
		//decrement the position for reals
		
		inputSampleL *= c1L;
		trigger = fabs(inputSampleL)*4.7;
		if (trigger > 4.7) trigger = 4.7;
		trigger = sin(trigger);
		if (trigger < 0) trigger *= 8.0;
		if (trigger < -4.2) trigger = -4.2;
		c1L += trigger/speed5;
		if (c1L > compress) c1L = compress;
		//compress stage
		inputSampleR *= c1R;
		trigger = fabs(inputSampleR)*4.7;
		if (trigger > 4.7) trigger = 4.7;
		trigger = sin(trigger);
		if (trigger < 0) trigger *= 8.0;
		if (trigger < -4.2) trigger = -4.2;
		c1R += trigger/speed5;
		if (c1R > compress) c1R = compress;
		//compress stage
		
		allpasstemp = tap2 - 1;
		if (allpasstemp < 0 || allpasstemp > maxdelay2) {allpasstemp = maxdelay2;}
		//set up the delay position
		//using 'tap' and 'allpasstemp' to position the tap
		inputSampleL -= d2L[allpasstemp]*outallpass;
		d2L[tap2] = inputSampleL;
		inputSampleL *= outallpass;
		inputSampleL += (d2L[allpasstemp]);
		//allpass stage
		inputSampleR -= d2R[allpasstemp]*outallpass;
		d2R[tap2] = inputSampleR;
		inputSampleR *= outallpass;
		inputSampleR += (d2R[allpasstemp]);
		//allpass stage
		tap2--; if (tap2 < 0 || tap2 > maxdelay2) {tap2 = maxdelay2;}
		//decrement the position for reals
		
		inputSampleL *= c2L;
		trigger = fabs(inputSampleL)*4.7;
		if (trigger > 4.7) trigger = 4.7;
		trigger = sin(trigger);
		if (trigger < 0) trigger *= 8.0;
		if (trigger < -4.2) trigger = -4.2;
		c2L += trigger/speed4;
		if (c2L > compress) c2L = compress;
		//compress stage
		inputSampleR *= c2R;
		trigger = fabs(inputSampleR)*4.7;
		if (trigger > 4.7) trigger = 4.7;
		trigger = sin(trigger);
		if (trigger < 0) trigger *= 8.0;
		if (trigger < -4.2) trigger = -4.2;
		c2R += trigger/speed4;
		if (c2R > compress) c2R = compress;
		//compress stage
		
		allpasstemp = tap3 - 1;
		if (allpasstemp < 0 || allpasstemp > maxdelay3) {allpasstemp = maxdelay3;}
		//set up the delay position
		//using 'tap' and 'allpasstemp' to position the tap
		inputSampleL -= d3L[allpasstemp]*outallpass;
		d3L[tap3] = inputSampleL;
		inputSampleL *= outallpass;
		inputSampleL += (d3L[allpasstemp]);
		//allpass stage
		inputSampleR -= d3R[allpasstemp]*outallpass;
		d3R[tap3] = inputSampleR;
		inputSampleR *= outallpass;
		inputSampleR += (d3R[allpasstemp]);
		//allpass stage
		tap3--; if (tap3 < 0 || tap3 > maxdelay3) {tap3 = maxdelay3;}
		//decrement the position for reals
		
		inputSampleL *= c3L;
		trigger = fabs(inputSampleL)*4.7;
		if (trigger > 4.7) trigger = 4.7;
		trigger = sin(trigger);
		if (trigger < 0) trigger *= 8.0;
		if (trigger < -4.2) trigger = -4.2;
		c3L += trigger/speed3;
		if (c3L > compress) c3L = compress;
		//compress stage
		inputSampleR *= c3R;
		trigger = fabs(inputSampleR)*4.7;
		if (trigger > 4.7) trigger = 4.7;
		trigger = sin(trigger);
		if (trigger < 0) trigger *= 8.0;
		if (trigger < -4.2) trigger = -4.2;
		c3R += trigger/speed3;
		if (c3R > compress) c3R = compress;
		//compress stage
		
		allpasstemp = tap4 - 1;
		if (allpasstemp < 0 || allpasstemp > maxdelay4) {allpasstemp = maxdelay4;}
		//set up the delay position
		//using 'tap' and 'allpasstemp' to position the tap
		inputSampleL -= d4L[allpasstemp]*outallpass;
		d4L[tap4] = inputSampleL;
		inputSampleL *= outallpass;
		inputSampleL += (d4L[allpasstemp]);
		//allpass stage
		inputSampleR -= d4R[allpasstemp]*outallpass;
		d4R[tap4] = inputSampleR;
		inputSampleR *= outallpass;
		inputSampleR += (d4R[allpasstemp]);
		//allpass stage
		tap4--; if (tap4 < 0 || tap4 > maxdelay4) {tap4 = maxdelay4;}
		//decrement the position for reals
		
		inputSampleL *= c4L;
		trigger = fabs(inputSampleL)*4.7;
		if (trigger > 4.7) trigger = 4.7;
		trigger = sin(trigger);
		if (trigger < 0) trigger *= 8.0;
		if (trigger < -4.2) trigger = -4.2;
		c4L += trigger/speed2;
		if (c4L > compress) c4L = compress;
		//compress stage
		inputSampleR *= c4R;
		trigger = fabs(inputSampleR)*4.7;
		if (trigger > 4.7) trigger = 4.7;
		trigger = sin(trigger);
		if (trigger < 0) trigger *= 8.0;
		if (trigger < -4.2) trigger = -4.2;
		c4R += trigger/speed2;
		if (c4R > compress) c4R = compress;
		//compress stage
		
		allpasstemp = tap5 - 1;
		if (allpasstemp < 0 || allpasstemp > maxdelay5) {allpasstemp = maxdelay5;}
		//set up the delay position
		//using 'tap' and 'allpasstemp' to position the tap
		inputSampleL -= d5L[allpasstemp]*outallpass;
		d5L[tap5] = inputSampleL;
		inputSampleL *= outallpass;
		inputSampleL += (d5L[allpasstemp]);
		//allpass stage
		inputSampleR -= d5R[allpasstemp]*outallpass;
		d5R[tap5] = inputSampleR;
		inputSampleR *= outallpass;
		inputSampleR += (d5R[allpasstemp]);
		//allpass stage
		tap5--; if (tap5 < 0 || tap5 > maxdelay5) {tap5 = maxdelay5;}
		//decrement the position for reals
		
		inputSampleL *= c5L;
		trigger = fabs(inputSampleL)*4.7;
		if (trigger > 4.7) trigger = 4.7;
		trigger = sin(trigger);
		if (trigger < 0) trigger *= 8.0;
		if (trigger < -4.2) trigger = -4.2;
		c5L += trigger/speed1;
		if (c5L > compress) c5L = compress;
		//compress stage
		inputSampleR *= c5R;
		trigger = fabs(inputSampleR)*4.7;
		if (trigger > 4.7) trigger = 4.7;
		trigger = sin(trigger);
		if (trigger < 0) trigger *= 8.0;
		if (trigger < -4.2) trigger = -4.2;
		c5R += trigger/speed1;
		if (c5R > compress) c5R = compress;
		//compress stage
		
		if (compress > 1.0) {
			inputSampleL /= compress;
			inputSampleR /= compress;
		}
		
		//Begin L ADClip
		if (lastSampleL >= refclip)
		{
			if (inputSampleL < refclip)
			{
				lastSampleL = (outsoft + (inputSampleL * softness));
			}
			else lastSampleL = refclip;
		}
		
		if (lastSampleL <= -refclip)
		{
			if (inputSampleL > -refclip)
			{
				lastSampleL = (-outsoft + (inputSampleL * softness));
			}
			else lastSampleL = -refclip;
		}
		
		if (inputSampleL > refclip)
		{
			if (lastSampleL < refclip)
			{
				inputSampleL = (invsoft + (lastSampleL * softness));
			}
			else inputSampleL = refclip;
		}
		
		if (inputSampleL < -refclip)
		{
			if (lastSampleL > -refclip)
			{
				inputSampleL = (-invsoft + (lastSampleL * softness));
			}
			else inputSampleL = -refclip;
		}
		//Completed L ADClip
		
		//Begin R ADClip
		if (lastSampleR >= refclip)
		{
			if (inputSampleR < refclip)
			{
				lastSampleR = (outsoft + (inputSampleR * softness));
			}
			else lastSampleR = refclip;
		}
		
		if (lastSampleR <= -refclip)
		{
			if (inputSampleR > -refclip)
			{
				lastSampleR = (-outsoft + (inputSampleR * softness));
			}
			else lastSampleR = -refclip;
		}
		
		if (inputSampleR > refclip)
		{
			if (lastSampleR < refclip)
			{
				inputSampleR = (invsoft + (lastSampleR * softness));
			}
			else inputSampleR = refclip;
		}
		
		if (inputSampleR < -refclip)
		{
			if (lastSampleR > -refclip)
			{
				inputSampleR = (-invsoft + (lastSampleR * softness));
			}
			else inputSampleR = -refclip;
		}
		//Completed R ADClip
		
		
		
		//begin 32 bit stereo floating point dither
		int expon; frexpf((float)inputSampleL, &expon);
		fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
		inputSampleL += double((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2.0,expon+62.0));
		frexpf((float)inputSampleR, &expon);
		fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
		inputSampleR += double((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2.0,expon+62.0));
		//end 32 bit stereo floating point dither
		
		*out1 = float(inputSampleL);
		*out2 = float(inputSampleR);

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

} // end namespace

#endif // SHR3D_SFX_CORE_AIRWINDOWS
