/*
*	File:		Console8BussOut.cpp
*	
*	Version:	1.0
* 
*	Created:	6/10/22
*	
*	Copyright:  Copyright © 2022 Airwindows, Airwindows uses the MIT license
* 
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/*=============================================================================
	Console8BussOut.cpp
	
=============================================================================*/
#include "Console8BussOut.h"


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

COMPONENT_ENTRY(Console8BussOut)


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Console8BussOut::Console8BussOut
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Console8BussOut::Console8BussOut(AudioUnit component)
	: AUEffectBase(component)
{
	CreateElements();
	Globals()->UseIndexedParameters(kNumberOfParameters);
	SetParameter(kParam_One, kDefaultValue_ParamOne );
         
#if AU_DEBUG_DISPATCHER
	mDebugDispatcher = new AUDebugDispatcher (this);
#endif
	
}


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Console8BussOut::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Console8BussOut::GetParameterValueStrings(AudioUnitScope		inScope,
                                                                AudioUnitParameterID	inParameterID,
                                                                CFArrayRef *		outStrings)
{
        
    return kAudioUnitErr_InvalidProperty;
}



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Console8BussOut::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Console8BussOut::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_Generic;
                outParameterInfo.minValue = 0.0;
                outParameterInfo.maxValue = 1.0;
                outParameterInfo.defaultValue = kDefaultValue_ParamOne;
                break;
           default:
                result = kAudioUnitErr_InvalidParameter;
                break;
            }
	} else {
        result = kAudioUnitErr_InvalidParameter;
    }
    


	return result;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Console8BussOut::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Console8BussOut::GetPropertyInfo (AudioUnitPropertyID	inID,
                                                        AudioUnitScope		inScope,
                                                        AudioUnitElement	inElement,
                                                        UInt32 &		outDataSize,
                                                        Boolean &		outWritable)
{
	return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Console8BussOut::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Console8BussOut::GetProperty(	AudioUnitPropertyID inID,
                                                        AudioUnitScope 		inScope,
                                                        AudioUnitElement 	inElement,
                                                        void *			outData )
{
	return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}

//	Console8BussOut::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Console8BussOut::Initialize()
{
    ComponentResult result = AUEffectBase::Initialize();
    if (result == noErr)
        Reset(kAudioUnitScope_Global, 0);
    return result;
}

#pragma mark ____Console8BussOutEffectKernel



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Console8BussOut::Console8BussOutKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void		Console8BussOut::Console8BussOutKernel::Reset()
{
	inTrimA = 0.5; inTrimB = 0.5;
	for (int x = 0; x < fix_total; x++) fix[x] = 0.0;
	lastSample = 0.0;
	wasPosClip = false;
	wasNegClip = false;
	for (int x = 0; x < 17; x++) intermediate[x] = 0.0;
	fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Console8BussOut::Console8BussOutKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void		Console8BussOut::Console8BussOutKernel::Process(	const Float32 	*inSourceP,
                                                    Float32		 	*inDestP,
                                                    UInt32 			inFramesToProcess,
                                                    UInt32			inNumChannels, 
                                                    bool			&ioSilence )
{
	UInt32 nSampleFrames = inFramesToProcess;
	const Float32 *sourceP = inSourceP;
	Float32 *destP = inDestP;
	
	inTrimA = inTrimB; inTrimB = GetParameter( kParam_One )*2.0;
	//0.5 is unity gain, and we can attenuate to silence or boost slightly over 12dB
	//into softclip and ADClip in case we need intense loudness bursts on transients.
	//24 bit is 8388608.0, 16 bit is 32768.0
	if (GetSampleRate() > 49000.0) hsr = true;
	else hsr = false;
	fix[fix_freq] = 24000.0 / GetSampleRate();
    fix[fix_reso] = 0.52110856;
	double K = tan(M_PI * fix[fix_freq]); //lowpass
	double norm = 1.0 / (1.0 + K / fix[fix_reso] + K * K);
	fix[fix_a0] = K * K * norm;
	fix[fix_a1] = 2.0 * fix[fix_a0];
	fix[fix_a2] = fix[fix_a0];
	fix[fix_b1] = 2.0 * (K * K - 1.0) * norm;
	fix[fix_b2] = (1.0 - K / fix[fix_reso] + K * K) * norm;
	//this is the fixed biquad distributed anti-aliasing filter
	double overallscale = 1.0;
	overallscale /= 44100.0;
	overallscale *= GetSampleRate();	
	spacing = floor(overallscale); //should give us working basic scaling, usually 2 or 4
	if (spacing < 1) spacing = 1; if (spacing > 16) spacing = 16; //ADClip2
	
	while (nSampleFrames-- > 0) {
		double inputSample = *sourceP;
		if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17;
		
		
		double position = (double)nSampleFrames/inFramesToProcess;
		double inTrim = (inTrimA*position)+(inTrimB*(1.0-position));
		//presence smoothed to cut out zipper noise
		inputSample *= inTrim;
		if (inputSample > 1.57079633) inputSample = 1.57079633; if (inputSample < -1.57079633) inputSample = -1.57079633;
		inputSample = sin(inputSample);
		//Console8 gain stage clips at exactly 1.0 post-sin()
		if (hsr){
			double outSample = (inputSample * fix[fix_a0]) + fix[fix_sL1];
			fix[fix_sL1] = (inputSample * fix[fix_a1]) - (outSample * fix[fix_b1]) + fix[fix_sL2];
			fix[fix_sL2] = (inputSample * fix[fix_a2]) - (outSample * fix[fix_b2]);
			inputSample = outSample;
		} //fixed biquad filtering ultrasonics
		inputSample *= inTrim;
		//the final output fader, before ClipOnly2
		
		if (inputSample > 4.0) inputSample = 4.0; if (inputSample < -4.0) inputSample = -4.0;
		if (wasPosClip) { //current will be over
			if (inputSample<lastSample) lastSample=0.7058208+(inputSample*0.2609148);
			else lastSample = 0.2491717+(lastSample*0.7390851);
		} wasPosClip = false;
		if (inputSample>0.9549925859) {wasPosClip=true;inputSample=0.7058208+(lastSample*0.2609148);}
		if (wasNegClip) { //current will be -over
			if (inputSample > lastSample) lastSample=-0.7058208+(inputSample*0.2609148);
			else lastSample=-0.2491717+(lastSample*0.7390851);
		} wasNegClip = false;
		if (inputSample<-0.9549925859) {wasNegClip=true;inputSample=-0.7058208+(lastSample*0.2609148);}
		intermediate[spacing] = inputSample;
        inputSample = lastSample; //Latency is however many samples equals one 44.1k sample
		for (int x = spacing; x > 0; x--) intermediate[x-1] = intermediate[x];
		lastSample = intermediate[0]; //run a little buffer to handle this
		//ClipOnly2
				
		*destP = inputSample;
		
		sourceP += inNumChannels; destP += inNumChannels;
	}
}

