/*
*	File:		Dynamics2.cpp
*	
*	Version:	1.0
* 
*	Created:	9/20/25
*	
*	Copyright:  Copyright © 2025 Airwindows, Airwindows uses the MIT license
* 
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/*=============================================================================
	Dynamics2.cpp
	
=============================================================================*/
#include "Dynamics2.h"


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

AUDIOCOMPONENT_ENTRY(AUBaseFactory, Dynamics2)


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Dynamics2::Dynamics2
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dynamics2::Dynamics2(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 );
         
#if AU_DEBUG_DISPATCHER
	mDebugDispatcher = new AUDebugDispatcher (this);
#endif
	
}


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Dynamics2::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Dynamics2::GetParameterValueStrings(AudioUnitScope		inScope,
                                                                AudioUnitParameterID	inParameterID,
                                                                CFArrayRef *		outStrings)
{
        
    return kAudioUnitErr_InvalidProperty;
}



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Dynamics2::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Dynamics2::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;
           default:
                result = kAudioUnitErr_InvalidParameter;
                break;
            }
	} else {
        result = kAudioUnitErr_InvalidParameter;
    }
    


	return result;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Dynamics2::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Dynamics2::GetPropertyInfo (AudioUnitPropertyID	inID,
                                                        AudioUnitScope		inScope,
                                                        AudioUnitElement	inElement,
                                                        UInt32 &		outDataSize,
                                                        Boolean &		outWritable)
{
	return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// state that plugin supports only stereo-in/stereo-out processing
UInt32 Dynamics2::SupportedNumChannels(const AUChannelInfo ** outInfo)
{
	if (outInfo != NULL)
	{
		static AUChannelInfo info;
		info.inChannels = 2;
		info.outChannels = 2;
		*outInfo = &info;
	}

	return 1;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Dynamics2::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Dynamics2::GetProperty(	AudioUnitPropertyID inID,
                                                        AudioUnitScope 		inScope,
                                                        AudioUnitElement 	inElement,
                                                        void *			outData )
{
	return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}

//	Dynamics2::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Dynamics2::Initialize()
{
    ComponentResult result = AUEffectBase::Initialize();
    if (result == noErr)
        Reset(kAudioUnitScope_Global, 0);
    return result;
}

#pragma mark ____Dynamics2EffectKernel



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Dynamics2::Dynamics2Kernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult		Dynamics2::Reset(AudioUnitScope inScope, AudioUnitElement inElement)
{
	for (int x = 0; x < bez_total; x++) {bezCompF[x] = 0.0;bezCompS[x] = 0.0;}
	bezCompF[bez_cycle] = 1.0; bezMaxF = 0.0;
	bezCompS[bez_cycle] = 1.0; bezGate = 2.0;
	
	fpdL = 1.0; while (fpdL < 16386) fpdL = rand()*UINT32_MAX;
	fpdR = 1.0; while (fpdR < 16386) fpdR = rand()*UINT32_MAX;
	return noErr;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Dynamics2::ProcessBufferLists
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
OSStatus		Dynamics2::ProcessBufferLists(AudioUnitRenderActionFlags & ioActionFlags,
													const AudioBufferList & inBuffer,
                                                    AudioBufferList & outBuffer,
                                                    UInt32 			inFramesToProcess)
{
	Float32 * inputL = (Float32*)(inBuffer.mBuffers[0].mData);
	Float32 * inputR = (Float32*)(inBuffer.mBuffers[1].mData);
	Float32 * outputL = (Float32*)(outBuffer.mBuffers[0].mData);
	Float32 * outputR = (Float32*)(outBuffer.mBuffers[1].mData);
	UInt32 nSampleFrames = inFramesToProcess;
	double overallscale = 1.0;
	overallscale /= 44100.0;
	overallscale *= GetSampleRate();
	
	double bezCThresh = pow(1.0-GetParameter( kParam_A ), 6.0) * 8.0;
	double bezRez = pow(1.0-GetParameter( kParam_B ), 8.0) / overallscale; 
	double sloRez = pow(1.0-GetParameter( kParam_C ),12.0) / overallscale;
	sloRez = fmin(fmax(sloRez-(bezRez*0.5),0.00001),1.0);
	bezRez = fmin(fmax(bezRez,0.0001),1.0);
	double gate = pow(pow(GetParameter( kParam_D ),4.0),sqrt(bezCThresh+1.0));
	
	while (nSampleFrames-- > 0) {
		double inputSampleL = *inputL;
		double inputSampleR = *inputR;
		if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
		if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
		
		if (fmax(fabs(inputSampleL),fabs(inputSampleR)) > gate+(sloRez*bezGate)) bezGate = ((bezGate*overallscale*3.0)+3.0)*(0.25/overallscale);
		else bezGate = fmax(0.0, bezGate-(sloRez*sloRez));
		
		if (bezCThresh > 0.0) {
			inputSampleL *= ((bezCThresh*0.5)+1.0);
			inputSampleR *= ((bezCThresh*0.5)+1.0);
		}
		
		bezCompF[bez_cycle] += bezRez;
		bezCompF[bez_SampL] += (fabs(inputSampleL) * bezRez);
		bezCompF[bez_SampR] += (fabs(inputSampleR) * bezRez);
		bezMaxF = fmax(bezMaxF,fmax(fabs(inputSampleL),fabs(inputSampleR)));
		
		if (bezCompF[bez_cycle] > 1.0) {
			bezCompF[bez_cycle] -= 1.0;
			
			if (bezMaxF < gate) bezCompF[bez_SampL] = bezMaxF/gate; //note: SampL is a control voltage,
			if (bezCompF[bez_SampL]<gate) bezCompF[bez_SampL] = 0.0; //not a bipolar audio signal
			bezCompF[bez_CL] = bezCompF[bez_BL];
			bezCompF[bez_BL] = bezCompF[bez_AL];
			bezCompF[bez_AL] = bezCompF[bez_SampL];
			bezCompF[bez_SampL] = 0.0;
			
			if (bezMaxF < gate) bezCompF[bez_SampR] = bezMaxF/gate; //note: SampR is a control voltage,
			if (bezCompF[bez_SampR]<gate) bezCompF[bez_SampR] = 0.0; //not a bipolar audio signal
			bezCompF[bez_CR] = bezCompF[bez_BR];
			bezCompF[bez_BR] = bezCompF[bez_AR];
			bezCompF[bez_AR] = bezCompF[bez_SampR];
			bezCompF[bez_SampR] = 0.0;
			
			bezMaxF = 0.0;
		}
		bezCompS[bez_cycle] += sloRez;
		bezCompS[bez_SampL] += (fabs(inputSampleL) * sloRez); //note: SampL is a control voltage
		bezCompS[bez_SampR] += (fabs(inputSampleR) * sloRez); //note: SampR is a control voltage
		if (bezCompS[bez_cycle] > 1.0) {
			bezCompS[bez_cycle] -= 1.0;
			
			if (bezCompS[bez_SampL]<gate) bezCompS[bez_SampL] = 0.0;
			bezCompS[bez_CL] = bezCompS[bez_BL];
			bezCompS[bez_BL] = bezCompS[bez_AL];
			bezCompS[bez_AL] = bezCompS[bez_SampL];
			bezCompS[bez_SampL] = 0.0;
			
			if (bezCompS[bez_SampR]<gate) bezCompS[bez_SampR] = 0.0;
			bezCompS[bez_CR] = bezCompS[bez_BR];
			bezCompS[bez_BR] = bezCompS[bez_AR];
			bezCompS[bez_AR] = bezCompS[bez_SampR];
			bezCompS[bez_SampR] = 0.0;
		}
		double CBFL = (bezCompF[bez_CL]*(1.0-bezCompF[bez_cycle]))+(bezCompF[bez_BL]*bezCompF[bez_cycle]);
		double BAFL = (bezCompF[bez_BL]*(1.0-bezCompF[bez_cycle]))+(bezCompF[bez_AL]*bezCompF[bez_cycle]);
		double CBAFL = (bezCompF[bez_BL]+(CBFL*(1.0-bezCompF[bez_cycle]))+(BAFL*bezCompF[bez_cycle]))*0.5;
		double CBSL = (bezCompS[bez_CL]*(1.0-bezCompS[bez_cycle]))+(bezCompS[bez_BL]*bezCompS[bez_cycle]);
		double BASL = (bezCompS[bez_BL]*(1.0-bezCompS[bez_cycle]))+(bezCompS[bez_AL]*bezCompS[bez_cycle]);
		double CBASL = (bezCompS[bez_BL]+(CBSL*(1.0-bezCompS[bez_cycle]))+(BASL*bezCompS[bez_cycle]))*0.5;
		double CBAMax = fmax(CBASL,CBAFL); if (CBAMax > 0.0) CBAMax = 1.0/CBAMax;
		double CBAFade = ((CBASL*-CBAMax)+(CBAFL*CBAMax)+1.0)*0.5;
		if (bezCThresh > 0.0) inputSampleL *= 1.0-(fmin(((CBASL*(1.0-CBAFade))+(CBAFL*CBAFade))*bezCThresh,1.0));
		
		double CBFR = (bezCompF[bez_CR]*(1.0-bezCompF[bez_cycle]))+(bezCompF[bez_BR]*bezCompF[bez_cycle]);
		double BAFR = (bezCompF[bez_BR]*(1.0-bezCompF[bez_cycle]))+(bezCompF[bez_AR]*bezCompF[bez_cycle]);
		double CBAFR = (bezCompF[bez_BR]+(CBFR*(1.0-bezCompF[bez_cycle]))+(BAFR*bezCompF[bez_cycle]))*0.5;
		double CBSR = (bezCompS[bez_CR]*(1.0-bezCompS[bez_cycle]))+(bezCompS[bez_BR]*bezCompS[bez_cycle]);
		double BASR = (bezCompS[bez_BR]*(1.0-bezCompS[bez_cycle]))+(bezCompS[bez_AR]*bezCompS[bez_cycle]);
		double CBASR = (bezCompS[bez_BR]+(CBSR*(1.0-bezCompS[bez_cycle]))+(BASR*bezCompS[bez_cycle]))*0.5;
		CBAMax = fmax(CBASR,CBAFR); if (CBAMax > 0.0) CBAMax = 1.0/CBAMax;
		CBAFade = ((CBASR*-CBAMax)+(CBAFR*CBAMax)+1.0)*0.5;
		if (bezCThresh > 0.0) inputSampleR *= 1.0-(fmin(((CBASR*(1.0-CBAFade))+(CBAFR*CBAFade))*bezCThresh,1.0));
		
		if (bezGate < 1.0 && gate > 0.0) {inputSampleL *= bezGate; inputSampleR *= bezGate;}
				
		//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
		
		*outputL = inputSampleL;
		*outputR = inputSampleR;
		//direct stereo out
		
		inputL += 1;
		inputR += 1;
		outputL += 1;
		outputR += 1;
	}
	return noErr;
}

