/*
 *	File:		Pop3Mono.cpp
 *	
 *	Version:	1.0
 * 
 *	Created:	4/19/24
 *	
 *	Copyright:  Copyright © 2024 Airwindows, Airwindows uses the MIT license
 * 
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/*=============================================================================
 Pop3Mono.cpp
 
 =============================================================================*/
#include "Pop3Mono.h"


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

AUDIOCOMPONENT_ENTRY(AUBaseFactory, Pop3Mono)


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Pop3Mono::Pop3Mono
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Pop3Mono::Pop3Mono(AudioUnit component)
: AUEffectBase(component)
{
	CreateElements();
	Globals()->UseIndexedParameters(kNumberOfParameters);
	SetParameter(kParam_A, kDefaultValue_ParamA );
	SetParameter(kParam_B, kDefaultValue_ParamB );
	SetParameter(kParam_C, kDefaultValue_ParamC );
	SetParameter(kParam_D, kDefaultValue_ParamD );
	SetParameter(kParam_E, kDefaultValue_ParamE );
	SetParameter(kParam_F, kDefaultValue_ParamF );
	SetParameter(kParam_G, kDefaultValue_ParamG );
	SetParameter(kParam_H, kDefaultValue_ParamH );
	
#if AU_DEBUG_DISPATCHER
	mDebugDispatcher = new AUDebugDispatcher (this);
#endif
	
}


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Pop3Mono::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Pop3Mono::GetParameterValueStrings(AudioUnitScope		inScope,
														   AudioUnitParameterID	inParameterID,
														   CFArrayRef *		outStrings)
{
	
    return kAudioUnitErr_InvalidProperty;
}



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Pop3Mono::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Pop3Mono::GetParameterInfo(AudioUnitScope		inScope,
												   AudioUnitParameterID	inParameterID,
												   AudioUnitParameterInfo	&outParameterInfo )
{
	ComponentResult result = noErr;
	
	outParameterInfo.flags = 	kAudioUnitParameterFlag_IsWritable
	|		kAudioUnitParameterFlag_IsReadable;
    
    if (inScope == kAudioUnitScope_Global) {
        switch(inParameterID)
        {
            case kParam_A:
                AUBase::FillInParameterName (outParameterInfo, kParameterAName, false);
                outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
                outParameterInfo.minValue = 0.0;
                outParameterInfo.maxValue = 1.0;
                outParameterInfo.defaultValue = kDefaultValue_ParamA;
                break;
            case kParam_B:
                AUBase::FillInParameterName (outParameterInfo, kParameterBName, false);
                outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
                outParameterInfo.minValue = 0.0;
                outParameterInfo.maxValue = 1.0;
                outParameterInfo.defaultValue = kDefaultValue_ParamB;
                break;
            case kParam_C:
                AUBase::FillInParameterName (outParameterInfo, kParameterCName, false);
                outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
                outParameterInfo.minValue = 0.0;
                outParameterInfo.maxValue = 1.0;
                outParameterInfo.defaultValue = kDefaultValue_ParamC;
                break;
            case kParam_D:
                AUBase::FillInParameterName (outParameterInfo, kParameterDName, false);
                outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
                outParameterInfo.minValue = 0.0;
                outParameterInfo.maxValue = 1.0;
                outParameterInfo.defaultValue = kDefaultValue_ParamD;
                break;
            case kParam_E:
                AUBase::FillInParameterName (outParameterInfo, kParameterEName, false);
                outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
                outParameterInfo.minValue = 0.0;
                outParameterInfo.maxValue = 1.0;
                outParameterInfo.defaultValue = kDefaultValue_ParamE;
                break;
            case kParam_F:
                AUBase::FillInParameterName (outParameterInfo, kParameterFName, false);
                outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
                outParameterInfo.minValue = 0.0;
                outParameterInfo.maxValue = 1.0;
                outParameterInfo.defaultValue = kDefaultValue_ParamF;
                break;
            case kParam_G:
                AUBase::FillInParameterName (outParameterInfo, kParameterGName, false);
                outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
                outParameterInfo.minValue = 0.0;
                outParameterInfo.maxValue = 1.0;
                outParameterInfo.defaultValue = kDefaultValue_ParamG;
                break;
            case kParam_H:
                AUBase::FillInParameterName (outParameterInfo, kParameterHName, false);
                outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
                outParameterInfo.minValue = 0.0;
                outParameterInfo.maxValue = 1.0;
                outParameterInfo.defaultValue = kDefaultValue_ParamH;
                break;
			default:
                result = kAudioUnitErr_InvalidParameter;
                break;
		}
	} else {
        result = kAudioUnitErr_InvalidParameter;
    }
    
	
	
	return result;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Pop3Mono::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Pop3Mono::GetPropertyInfo (AudioUnitPropertyID	inID,
												   AudioUnitScope		inScope,
												   AudioUnitElement	inElement,
												   UInt32 &		outDataSize,
												   Boolean &		outWritable)
{
	return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Pop3Mono::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Pop3Mono::GetProperty(	AudioUnitPropertyID inID,
											  AudioUnitScope 		inScope,
											  AudioUnitElement 	inElement,
											  void *			outData )
{
	return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}

//	Pop3Mono::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Pop3Mono::Initialize()
{
    ComponentResult result = AUEffectBase::Initialize();
    if (result == noErr)
        Reset(kAudioUnitScope_Global, 0);
    return result;
}

#pragma mark ____Pop3MonoEffectKernel



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Pop3Mono::Pop3MonoKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void		Pop3Mono::Pop3MonoKernel::Reset()
{
	popComp = 1.0;
	popGate = 1.0;
	fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Pop3Mono::Pop3MonoKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void		Pop3Mono::Pop3MonoKernel::Process(	const Float32 	*inSourceP,
											  Float32		 	*inDestP,
											  UInt32 			inFramesToProcess,
											  UInt32			inNumChannels, 
											  bool			&ioSilence )
{
	UInt32 nSampleFrames = inFramesToProcess;
	const Float32 *sourceP = inSourceP;
	Float32 *destP = inDestP;
	double overallscale = 1.0;
	overallscale /= 44100.0;
	overallscale *= GetSampleRate();
	
	double compThresh = pow(GetParameter( kParam_A ),4);
	double compRatio = 1.0-pow(1.0-GetParameter( kParam_B ),2);
	double compAttack = 1.0/(((pow(GetParameter( kParam_C ),3)*5000.0)+500.0)*overallscale);
	double compRelease = 1.0/(((pow(GetParameter( kParam_D ),5)*50000.0)+500.0)*overallscale);
	
	double gateThresh = pow(GetParameter( kParam_E ),4);
	double gateRatio = 1.0-pow(1.0-GetParameter( kParam_F ),2);
	double gateSustain = M_PI_2 * pow(GetParameter( kParam_G )+1.0,4.0);
	double gateRelease = 1.0/(((pow(GetParameter( kParam_H ),5)*500000.0)+500.0)*overallscale);
	
	while (nSampleFrames-- > 0) {
		double inputSample = *sourceP;
		if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17;
		
		if (fabs(inputSample) > compThresh) { //compression 
			popComp -= (popComp * compAttack);
			popComp += ((compThresh / fabs(inputSample))*compAttack);
		} else popComp = (popComp*(1.0-compRelease))+compRelease;		
		if (fabs(inputSample) > gateThresh) popGate = gateSustain;
		else popGate *= (1.0-gateRelease);
		if (popGate < 0.0) popGate = 0.0;
		popComp = fmax(fmin(popComp,1.0),0.0);
		inputSample *= ((1.0-compRatio)+(popComp*compRatio));
		if (popGate < M_PI_2) inputSample *= ((1.0-gateRatio)+(sin(popGate)*gateRatio));
				
		//begin 32 bit floating point dither
		int expon; frexpf((float)inputSample, &expon);
		fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
		inputSample += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
		//end 32 bit floating point dither
		
		*destP = inputSample;
		
		sourceP += inNumChannels; destP += inNumChannels;
	}
}

