path: root/plugins/MacAU/Ditherbox/Ditherbox.cpp

/*
*	File:		Ditherbox.cpp
*	
*	Version:	1.0
* 
*	Created:	1/1/09
*	
*	Copyright:  Copyright � 2009 Airwindows, All Rights Reserved
* 
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/*=============================================================================
	Ditherbox.h
	
=============================================================================*/
#include "Ditherbox.h"


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

COMPONENT_ENTRY(Ditherbox)


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Ditherbox::Ditherbox
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Ditherbox::Ditherbox(AudioUnit component)
	: AUEffectBase(component)
{
	CreateElements();
	Globals()->UseIndexedParameters(kNumberOfParameters);
	SetParameter(kParam_One, kDefaultValue_ParamOne );
        
#if AU_DEBUG_DISPATCHER
	mDebugDispatcher = new AUDebugDispatcher (this);
#endif
	
}


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Ditherbox::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult		Ditherbox::GetParameterValueStrings(AudioUnitScope		inScope,
                                                                AudioUnitParameterID	inParameterID,
                                                                CFArrayRef *		outStrings)
{
    if ((inScope == kAudioUnitScope_Global) && (inParameterID == kParam_One)) //ID must be actual name of parameter identifier, not number
	{
			if (outStrings == NULL) return noErr;
			CFStringRef strings [] =
			{
				kMenuItem_Truncate,
				kMenuItem_Flat,
				kMenuItem_TPDF,
				kMenuItem_Paul,
				kMenuItem_DoublePaul,
				kMenuItem_Tape,
				kMenuItem_Quadratic,
				kMenuItem_TenNines,
				kMenuItem_Contingent,
				kMenuItem_Naturalize,
				kMenuItem_NJAD,
				kMenuItem_TruncateHR,
				kMenuItem_FlatHR,
				kMenuItem_TPDFHR,
				kMenuItem_PaulHR,
				kMenuItem_DoublePaulHR,
				kMenuItem_TapeHR,
				kMenuItem_QuadraticHR,
				kMenuItem_TenNinesHR,
				kMenuItem_ContingentHR,
				kMenuItem_NaturalizeHR,
				kMenuItem_NJADHR,
				kMenuItem_SlewOnly,
				kMenuItem_SubsOnly,
				kMenuItem_Silhouette,
			};
			*outStrings = CFArrayCreate (
			NULL,
			(const void **) strings,
			(sizeof (strings) / sizeof (strings [0])),
			NULL
		);
		return noErr;
	}
    return kAudioUnitErr_InvalidProperty;
}



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Ditherbox::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult		Ditherbox::GetParameterInfo(AudioUnitScope		inScope,
                                                        AudioUnitParameterID	inParameterID,
                                                        AudioUnitParameterInfo	&outParameterInfo )
{
	ComponentResult result = noErr;

	outParameterInfo.flags = 	kAudioUnitParameterFlag_IsWritable
						|		kAudioUnitParameterFlag_IsReadable;
    
    if (inScope == kAudioUnitScope_Global) {
        switch(inParameterID)
        {
              case kParam_One:
                AUBase::FillInParameterName (outParameterInfo, kParameterOneName, false);
				outParameterInfo.unit = kAudioUnitParameterUnit_Indexed;
				outParameterInfo.minValue = kTruncate;
				outParameterInfo.maxValue = kSilhouette;
				outParameterInfo.defaultValue = kDefaultValue_ParamOne;
				break;
			 default:
                result = kAudioUnitErr_InvalidParameter;
                break;
            }
	} else {
        result = kAudioUnitErr_InvalidParameter;
    }
    


	return result;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Ditherbox::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult		Ditherbox::GetPropertyInfo (AudioUnitPropertyID	inID,
                                                        AudioUnitScope		inScope,
                                                        AudioUnitElement	inElement,
                                                        UInt32 &		outDataSize,
                                                        Boolean &		outWritable)
{
	return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Ditherbox::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult		Ditherbox::GetProperty(	AudioUnitPropertyID inID,
                                                        AudioUnitScope 		inScope,
                                                        AudioUnitElement 	inElement,
                                                        void *			outData )
{
	return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Ditherbox::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Ditherbox::Initialize()
{
    ComponentResult result = AUEffectBase::Initialize();
    if (result == noErr)
        Reset(kAudioUnitScope_Global, 0);
    return result;
}

#pragma mark ____DitherboxEffectKernel


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Ditherbox::DitherboxKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void		Ditherbox::DitherboxKernel::Reset()
{
	Position = 99999999;
	contingentErr = 0.0;
	byn[0] = 1000;
	byn[1] = 301;
	byn[2] = 176;
	byn[3] = 125;
	byn[4] = 97;
	byn[5] = 79;
	byn[6] = 67;
	byn[7] = 58;
	byn[8] = 51;
	byn[9] = 46;
	byn[10] = 1000;
	noiseShaping = 0.0;
	NSOdd = 0.0;
	NSEven = 0.0;
	prev = 0.0;
	ns[0] = 0;
	ns[1] = 0;
	ns[2] = 0;
	ns[3] = 0;
	ns[4] = 0;
	ns[5] = 0;
	ns[6] = 0;
	ns[7] = 0;
	ns[8] = 0;
	ns[9] = 0;
	ns[10] = 0;
	ns[11] = 0;
	ns[12] = 0;
	ns[13] = 0;
	ns[14] = 0;
	ns[15] = 0;
	lastSample = 0.0;
	outSample = 0.0;
	iirSampleA = 0.0;
	iirSampleB = 0.0;
	iirSampleC = 0.0;
	iirSampleD = 0.0;
	iirSampleE = 0.0;
	iirSampleF = 0.0;
	iirSampleG = 0.0;
	iirSampleH = 0.0;
	iirSampleI = 0.0;
	iirSampleJ = 0.0;
	iirSampleK = 0.0;
	iirSampleL = 0.0;
	iirSampleM = 0.0;
	iirSampleN = 0.0;
	iirSampleO = 0.0;
	iirSampleP = 0.0;
	iirSampleQ = 0.0;
	iirSampleR = 0.0;
	iirSampleS = 0.0;
	iirSampleT = 0.0;
	iirSampleU = 0.0;
	iirSampleV = 0.0;
	iirSampleW = 0.0;
	iirSampleX = 0.0;
	iirSampleY = 0.0;
	iirSampleZ = 0.0;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Ditherbox::DitherboxKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void		Ditherbox::DitherboxKernel::Process(	const Float32 	*inSourceP,
                                                    Float32		 	*inDestP,
                                                    UInt32 			inFramesToProcess,
                                                    UInt32			inNumChannels, // for version 2 AudioUnits inNumChannels is always 1
                                                    bool			&ioSilence )
{

	
	UInt32 nSampleFrames = inFramesToProcess;
	const Float32 *sourceP = inSourceP;
	Float32 *destP = inDestP;
	long double contingentRnd;
	long double absSample;
	long double contingent;
	long double overallscale = 1.0;
	overallscale /= 44100.0;
	overallscale *= GetSampleRate();
	long double iirAmount = 2250/44100.0;
	long double gaintarget = 1.42;
	long double gain;
	iirAmount /= overallscale;
	long double altAmount = 1.0 - iirAmount;
	long double inputSample;
	long double outputSample;
	long double silhouette;
	long double smoother;
	long double bridgerectifier;
	long double benfordize;
	int hotbinA;
	int hotbinB;
	long double totalA;
	long double totalB;
	long double randyConstant = 1.61803398874989484820458683436563811772030917980576;
	long double omegaConstant = 0.56714329040978387299996866221035554975381578718651;
	long double expConstant = 0.06598803584531253707679018759684642493857704825279;
	long double trim = 2.302585092994045684017991; //natural logarithm of 10
	int dtype = (int) GetParameter( kParam_One ); // +1 for Reaper bug workaround
	bool highRes = false;
	bool dithering = true;
	
	Float32 drySample; //should be the same as what the native DAW buss is

	if (dtype > 11){highRes = true; dtype -= 11;}
	
	if (dtype > 11){dithering = false; highRes = false;}
	//follow up by switching high res back off for the monitoring
	
	while (nSampleFrames-- > 0) {
		inputSample = *sourceP;
		if (inputSample<1.2e-38 && -inputSample<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;
			inputSample = 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.
		}
		drySample = inputSample;
		
		sourceP += inNumChannels;
		
		if (dtype == 8) inputSample -= noiseShaping;
		
		if (dithering) inputSample *= 32768.0;
		//denormalizing as way of controlling insane detail boosting
		if (highRes) inputSample *= 256.0; //256 for 16/24 version
		
		switch (dtype)
		{
		case 1: 
		inputSample = floor(inputSample);
		//truncate
		break;
		
		case 2: 
		inputSample += (rand()/(double)RAND_MAX);
		inputSample -= 0.5;
		inputSample = floor(inputSample);
		//flat dither
		break;
		
			case 3:
				inputSample += (rand()/(double)RAND_MAX);
				inputSample += (rand()/(double)RAND_MAX);
				inputSample -= 1.0;
				inputSample = floor(inputSample);
				//TPDF dither
				break;
				
			case 4:
				currentDither = (rand()/(double)RAND_MAX);
				inputSample += currentDither;
				inputSample -= lastSample;
				inputSample = floor(inputSample);
				lastSample = currentDither;
				//Paul dither
				break;
				
			case 5:
				ns[9] = ns[8]; ns[8] = ns[7]; ns[7] = ns[6]; ns[6] = ns[5];
				ns[5] = ns[4]; ns[4] = ns[3]; ns[3] = ns[2]; ns[2] = ns[1];
				ns[1] = ns[0]; ns[0] = (rand()/(double)RAND_MAX);
				
				currentDither  = (ns[0] * 0.061);
				currentDither -= (ns[1] * 0.11);
				currentDither += (ns[8] * 0.126);
				currentDither -= (ns[7] * 0.23);
				currentDither += (ns[2] * 0.25);
				currentDither -= (ns[3] * 0.43);
				currentDither += (ns[6] * 0.5);
				currentDither -= ns[5];
				currentDither += ns[4];
				//this sounds different from doing it in order of sample position
				//cumulative tiny errors seem to build up even at this buss depth
				//considerably more pronounced at 32 bit float.
				//Therefore we add the most significant components LAST.
				//trying to keep values on like exponents of the floating point value.
				inputSample += currentDither;
				
				inputSample = floor(inputSample);
				//DoublePaul dither
				break;
				
			case 6:
				currentDither = (rand()/(double)RAND_MAX);
				inputSample += currentDither;
				inputSample -= ns[4];
				inputSample = floor(inputSample);
				ns[4] = ns[3];
				ns[3] = ns[2];
				ns[2] = ns[1];
				ns[1] = currentDither;
				//Tape dither
				break;
				
				
		case 7: 
		Position += 1;
		//Note- uses integer overflow as a 'mod' operator
		hotbinA = Position * Position;
		hotbinA = hotbinA % 170003; //% is C++ mod operator
		hotbinA *= hotbinA;
		hotbinA = hotbinA % 17011; //% is C++ mod operator
		hotbinA *= hotbinA;
		hotbinA = hotbinA % 1709; //% is C++ mod operator
		hotbinA *= hotbinA;
		hotbinA = hotbinA % 173; //% is C++ mod operator
		hotbinA *= hotbinA;
		hotbinA = hotbinA % 17;
		hotbinA *= 0.0635;
		if (flip) hotbinA = -hotbinA;
		inputSample += hotbinA;
		inputSample = floor(inputSample);
		//Quadratic dither
		break;

		case 8:
		absSample = ((rand()/(double)RAND_MAX) - 0.5);
		ns[0] += absSample; ns[0] /= 2; absSample -= ns[0];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[1] += absSample; ns[1] /= 2; absSample -= ns[1];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[2] += absSample; ns[2] /= 2; absSample -= ns[2];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[3] += absSample; ns[3] /= 2; absSample -= ns[3];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[4] += absSample; ns[4] /= 2; absSample -= ns[4];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[5] += absSample; ns[5] /= 2; absSample -= ns[5];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[6] += absSample; ns[6] /= 2; absSample -= ns[6];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[7] += absSample; ns[7] /= 2; absSample -= ns[7];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[8] += absSample; ns[8] /= 2; absSample -= ns[8];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[9] += absSample; ns[9] /= 2; absSample -= ns[9];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[10] += absSample; ns[10] /= 2; absSample -= ns[10];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[11] += absSample; ns[11] /= 2; absSample -= ns[11];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[12] += absSample; ns[12] /= 2; absSample -= ns[12];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[13] += absSample; ns[13] /= 2; absSample -= ns[13];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[14] += absSample; ns[14] /= 2; absSample -= ns[14];
		absSample += ((rand()/(double)RAND_MAX) - 0.5);
		ns[15] += absSample; ns[15] /= 2; absSample -= ns[15];
		//install noise and then shape it
		absSample += inputSample;
		
		//NSOdd /= 1.0001; //NSDensity
		
		if (NSOdd > 0) NSOdd -= 0.97;
		if (NSOdd < 0) NSOdd += 0.97;
		
		NSOdd -= (NSOdd * NSOdd * NSOdd * 0.475);

		NSOdd += prev;
		absSample += (NSOdd*0.475);
		prev = floor(absSample) - inputSample;
		inputSample = floor(absSample);
		//TenNines dither
		break;
		
			case 9: 
				if (inputSample > 0) inputSample += 0.383;
				if (inputSample < 0) inputSample -= 0.383;
				//adjusting to permit more information drug outta the noisefloor
				contingentRnd = (((rand()/(double)RAND_MAX)+(rand()/(double)RAND_MAX))-1.0) * randyConstant; //produce TPDF dist, scale
				contingentRnd -= contingentErr*omegaConstant; //include err
				absSample = fabs(inputSample);
				contingentErr = absSample - floor(absSample); //get next err
				contingent = contingentErr * 2.0; //scale of quantization levels
				if (contingent > 1.0) contingent = ((-contingent+2.0)*omegaConstant) + expConstant;
				else contingent = (contingent * omegaConstant) + expConstant;
				//zero is next to a quantization level, one is exactly between them
				if (flip) contingentRnd = (contingentRnd * (1.0-contingent)) + contingent + 0.5;
				else contingentRnd = (contingentRnd * (1.0-contingent)) - contingent + 0.5;
				inputSample += (contingentRnd * contingent);
				//Contingent Dither
				inputSample = floor(inputSample);
				//note: this does not dither for values exactly the same as 16 bit values-
				//which forces the dither to gate at 0.0. It goes to digital black,
				//and does a teeny parallel-compression thing when almost at digital black.
				break;
				
			case 10:
				if (inputSample > 0) inputSample += (0.3333333333);
				if (inputSample < 0) inputSample -= (0.3333333333);
				
				inputSample += (rand()/(double)RAND_MAX)*0.6666666666;
				
				benfordize = floor(inputSample);
				while (benfordize >= 1.0) {benfordize /= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				hotbinA = floor(benfordize);
				//hotbin becomes the Benford bin value for this number floored
				totalA = 0;
				if ((hotbinA > 0) && (hotbinA < 10))
				{
					byn[hotbinA] += 1;
					totalA += (301-byn[1]);
					totalA += (176-byn[2]);
					totalA += (125-byn[3]);
					totalA += (97-byn[4]);
					totalA += (79-byn[5]);
					totalA += (67-byn[6]);
					totalA += (58-byn[7]);
					totalA += (51-byn[8]);
					totalA += (46-byn[9]);
					byn[hotbinA] -= 1;
				} else {hotbinA = 10;}
				//produce total number- smaller is closer to Benford real
				
				benfordize = ceil(inputSample);
				while (benfordize >= 1.0) {benfordize /= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				hotbinB = floor(benfordize);
				//hotbin becomes the Benford bin value for this number ceiled
				totalB = 0;
				if ((hotbinB > 0) && (hotbinB < 10))
				{
					byn[hotbinB] += 1;
					totalB += (301-byn[1]);
					totalB += (176-byn[2]);
					totalB += (125-byn[3]);
					totalB += (97-byn[4]);
					totalB += (79-byn[5]);
					totalB += (67-byn[6]);
					totalB += (58-byn[7]);
					totalB += (51-byn[8]);
					totalB += (46-byn[9]);
					byn[hotbinB] -= 1;
				} else {hotbinB = 10;}
				//produce total number- smaller is closer to Benford real
				
				if (totalA < totalB)
				{
					byn[hotbinA] += 1;
					inputSample = floor(inputSample);
				}
				else
				{
					byn[hotbinB] += 1;
					inputSample = ceil(inputSample);
				}
				//assign the relevant one to the delay line
				//and floor/ceil signal accordingly
				
				totalA = byn[1] + byn[2] + byn[3] + byn[4] + byn[5] + byn[6] + byn[7] + byn[8] + byn[9];
				totalA /= 1000;
				if (totalA = 0) totalA = 1; // spotted by Laserbat: this 'scaling back' code doesn't. It always divides by the fallback of 1. Old NJAD doesn't scale back the things we're comparing against. Kept to retain known behavior, use the one in StudioTan and Monitoring for a tuned-as-intended NJAD.
				byn[1] /= totalA;
				byn[2] /= totalA;
				byn[3] /= totalA;
				byn[4] /= totalA;
				byn[5] /= totalA;
				byn[6] /= totalA;
				byn[7] /= totalA;
				byn[8] /= totalA;
				byn[9] /= totalA;
				byn[10] /= 2; //catchall for garbage data
				break;
				
			case 11: //this one is the Not Just Another Dither
				
				benfordize = floor(inputSample);
				while (benfordize >= 1.0) {benfordize /= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				hotbinA = floor(benfordize);
				//hotbin becomes the Benford bin value for this number floored
				totalA = 0;
				if ((hotbinA > 0) && (hotbinA < 10))
				{
					byn[hotbinA] += 1;
					totalA += (301-byn[1]);
					totalA += (176-byn[2]);
					totalA += (125-byn[3]);
					totalA += (97-byn[4]);
					totalA += (79-byn[5]);
					totalA += (67-byn[6]);
					totalA += (58-byn[7]);
					totalA += (51-byn[8]);
					totalA += (46-byn[9]);
					byn[hotbinA] -= 1;
				} else {hotbinA = 10;}
				//produce total number- smaller is closer to Benford real
				
				benfordize = ceil(inputSample);
				while (benfordize >= 1.0) {benfordize /= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				if (benfordize < 1.0) {benfordize *= 10;}
				hotbinB = floor(benfordize);
				//hotbin becomes the Benford bin value for this number ceiled
				totalB = 0;
				if ((hotbinB > 0) && (hotbinB < 10))
				{
					byn[hotbinB] += 1;
					totalB += (301-byn[1]);
					totalB += (176-byn[2]);
					totalB += (125-byn[3]);
					totalB += (97-byn[4]);
					totalB += (79-byn[5]);
					totalB += (67-byn[6]);
					totalB += (58-byn[7]);
					totalB += (51-byn[8]);
					totalB += (46-byn[9]);
					byn[hotbinB] -= 1;
				} else {hotbinB = 10;}
				//produce total number- smaller is closer to Benford real
				
				if (totalA < totalB)
				{
					byn[hotbinA] += 1;
					inputSample = floor(inputSample);
				}
				else
				{
					byn[hotbinB] += 1;
					inputSample = ceil(inputSample);
				}
				//assign the relevant one to the delay line
				//and floor/ceil signal accordingly
				
				totalA = byn[1] + byn[2] + byn[3] + byn[4] + byn[5] + byn[6] + byn[7] + byn[8] + byn[9];
				totalA /= 1000;
				if (totalA = 0) totalA = 1; // spotted by Laserbat: this 'scaling back' code doesn't. It always divides by the fallback of 1. Old NJAD doesn't scale back the things we're comparing against. Kept to retain known behavior, use the one in StudioTan and Monitoring for a tuned-as-intended NJAD.
				byn[1] /= totalA;
				byn[2] /= totalA;
				byn[3] /= totalA;
				byn[4] /= totalA;
				byn[5] /= totalA;
				byn[6] /= totalA;
				byn[7] /= totalA;
				byn[8] /= totalA;
				byn[9] /= totalA;
				byn[10] /= 2; //catchall for garbage data
				break;
				
			case 12: 
			//slew only
			outputSample = (inputSample - lastSample)*trim;
			lastSample = inputSample;
			if (outputSample > 1.0) outputSample = 1.0;
			if (outputSample < -1.0) outputSample = -1.0;
			inputSample = outputSample;
		break;
				
		case 13: 
			//subs only
			gain = gaintarget;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			iirSampleA = (iirSampleA * altAmount) + (inputSample * iirAmount); inputSample = iirSampleA;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleB = (iirSampleB * altAmount) + (inputSample * iirAmount); inputSample = iirSampleB;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleC = (iirSampleC * altAmount) + (inputSample * iirAmount); inputSample = iirSampleC;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleD = (iirSampleD * altAmount) + (inputSample * iirAmount); inputSample = iirSampleD;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleE = (iirSampleE * altAmount) + (inputSample * iirAmount); inputSample = iirSampleE;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleF = (iirSampleF * altAmount) + (inputSample * iirAmount); inputSample = iirSampleF;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleG = (iirSampleG * altAmount) + (inputSample * iirAmount); inputSample = iirSampleG;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleH = (iirSampleH * altAmount) + (inputSample * iirAmount); inputSample = iirSampleH;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleI = (iirSampleI * altAmount) + (inputSample * iirAmount); inputSample = iirSampleI;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleJ = (iirSampleJ * altAmount) + (inputSample * iirAmount); inputSample = iirSampleJ;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleK = (iirSampleK * altAmount) + (inputSample * iirAmount); inputSample = iirSampleK;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleL = (iirSampleL * altAmount) + (inputSample * iirAmount); inputSample = iirSampleL;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleM = (iirSampleM * altAmount) + (inputSample * iirAmount); inputSample = iirSampleM;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleN = (iirSampleN * altAmount) + (inputSample * iirAmount); inputSample = iirSampleN;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleO = (iirSampleO * altAmount) + (inputSample * iirAmount); inputSample = iirSampleO;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleP = (iirSampleP * altAmount) + (inputSample * iirAmount); inputSample = iirSampleP;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleQ = (iirSampleQ * altAmount) + (inputSample * iirAmount); inputSample = iirSampleQ;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleR = (iirSampleR * altAmount) + (inputSample * iirAmount); inputSample = iirSampleR;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleS = (iirSampleS * altAmount) + (inputSample * iirAmount); inputSample = iirSampleS;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleT = (iirSampleT * altAmount) + (inputSample * iirAmount); inputSample = iirSampleT;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleU = (iirSampleU * altAmount) + (inputSample * iirAmount); inputSample = iirSampleU;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleV = (iirSampleV * altAmount) + (inputSample * iirAmount); inputSample = iirSampleV;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleW = (iirSampleW * altAmount) + (inputSample * iirAmount); inputSample = iirSampleW;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleX = (iirSampleX * altAmount) + (inputSample * iirAmount); inputSample = iirSampleX;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleY = (iirSampleY * altAmount) + (inputSample * iirAmount); inputSample = iirSampleY;
			inputSample *= gain; gain = ((gain-1)*0.75)+1;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;
			iirSampleZ = (iirSampleZ * altAmount) + (inputSample * iirAmount); inputSample = iirSampleZ;
			if (inputSample > 1.0) inputSample = 1.0;
			if (inputSample < -1.0) inputSample = -1.0;				
		break;
				
		case 14: 
			//silhouette
			bridgerectifier = fabs(inputSample)*1.57079633;
			if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
			bridgerectifier = 1.0-cos(bridgerectifier);
			if (inputSample > 0.0) inputSample = bridgerectifier;
			else inputSample = -bridgerectifier;
			
			silhouette = rand()/(double)RAND_MAX;
			silhouette -= 0.5;
			silhouette *= 2.0;
			silhouette *= fabs(inputSample);
			
			smoother = rand()/(double)RAND_MAX;
			smoother -= 0.5;
			smoother *= 2.0;
			smoother *= fabs(lastSample);
			lastSample = inputSample;
			
			silhouette += smoother;
			
			bridgerectifier = fabs(silhouette)*1.57079633;
			if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
			bridgerectifier = sin(bridgerectifier);
			if (silhouette > 0.0) silhouette = bridgerectifier;
			else silhouette = -bridgerectifier;
			
			inputSample = (silhouette + outSample) / 2.0;
			outSample = silhouette;
		break;
		}
		
		flip = !flip;
		//several dithers use this
		if (highRes) inputSample /= 256.0; //256 for 16/24 version
		if (dithering) inputSample /= 32768.0;
		
		if (dtype == 8) noiseShaping += inputSample - drySample;

		*destP = inputSample;
		destP += inNumChannels;
	}
}