aboutsummaryrefslogblamecommitdiffstats
path: root/plugins/MacAU/Highpass2/Highpass2.cpp
blob: fb9b98f7481dfeb9dd905366a61142fb1f8bf494 (plain) (tree)

























































































































































































































































































































                                                                                                                                    
/*
*	File:		Highpass2.cpp
*	
*	Version:	1.0
* 
*	Created:	3/13/19
*	
*	Copyright:  Copyright � 2019 Airwindows, All Rights Reserved
* 
*	Disclaimer:	IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in 
*				consideration of your agreement to the following terms, and your use, installation, modification 
*				or redistribution of this Apple software constitutes acceptance of these terms.  If you do 
*				not agree with these terms, please do not use, install, modify or redistribute this Apple 
*				software.
*
*				In consideration of your agreement to abide by the following terms, and subject to these terms, 
*				Apple grants you a personal, non-exclusive license, under Apple's copyrights in this 
*				original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the 
*				Apple Software, with or without modifications, in source and/or binary forms; provided that if you 
*				redistribute the Apple Software in its entirety and without modifications, you must retain this 
*				notice and the following text and disclaimers in all such redistributions of the Apple Software. 
*				Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to 
*				endorse or promote products derived from the Apple Software without specific prior written 
*				permission from Apple.  Except as expressly stated in this notice, no other rights or 
*				licenses, express or implied, are granted by Apple herein, including but not limited to any 
*				patent rights that may be infringed by your derivative works or by other works in which the 
*				Apple Software may be incorporated.
*
*				The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO WARRANTIES, EXPRESS OR 
*				IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY 
*				AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE 
*				OR IN COMBINATION WITH YOUR PRODUCTS.
*
*				IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL 
*				DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 
*				OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, 
*				REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER 
*				UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN 
*				IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*=============================================================================
	Highpass2.cpp
	
=============================================================================*/
#include "Highpass2.h"


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

COMPONENT_ENTRY(Highpass2)


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Highpass2::Highpass2
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Highpass2::Highpass2(AudioUnit component)
	: AUEffectBase(component)
{
	CreateElements();
	Globals()->UseIndexedParameters(kNumberOfParameters);
	SetParameter(kParam_One, kDefaultValue_ParamOne );
	SetParameter(kParam_Two, kDefaultValue_ParamTwo );
	SetParameter(kParam_Three, kDefaultValue_ParamThree );
	SetParameter(kParam_Four, kDefaultValue_ParamFour );
         
#if AU_DEBUG_DISPATCHER
	mDebugDispatcher = new AUDebugDispatcher (this);
#endif
	
}


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Highpass2::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Highpass2::GetParameterValueStrings(AudioUnitScope		inScope,
                                                                AudioUnitParameterID	inParameterID,
                                                                CFArrayRef *		outStrings)
{
        
    return kAudioUnitErr_InvalidProperty;
}



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Highpass2::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Highpass2::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;
            case kParam_Two:
                AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false);
                outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
                outParameterInfo.minValue = -1.0;
                outParameterInfo.maxValue = 1.0;
                outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
                break;
            case kParam_Three:
                AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false);
                outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
                outParameterInfo.minValue = 0.0;
                outParameterInfo.maxValue = 4.0;
                outParameterInfo.defaultValue = kDefaultValue_ParamThree;
                break;
           case kParam_Four:
                AUBase::FillInParameterName (outParameterInfo, kParameterFourName, false);
                outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
                outParameterInfo.minValue = 0.0;
                outParameterInfo.maxValue = 1.0;
                outParameterInfo.defaultValue = kDefaultValue_ParamFour;
                break;
           default:
                result = kAudioUnitErr_InvalidParameter;
                break;
            }
	} else {
        result = kAudioUnitErr_InvalidParameter;
    }
    


	return result;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Highpass2::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Highpass2::GetPropertyInfo (AudioUnitPropertyID	inID,
                                                        AudioUnitScope		inScope,
                                                        AudioUnitElement	inElement,
                                                        UInt32 &		outDataSize,
                                                        Boolean &		outWritable)
{
	return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Highpass2::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult			Highpass2::GetProperty(	AudioUnitPropertyID inID,
                                                        AudioUnitScope 		inScope,
                                                        AudioUnitElement 	inElement,
                                                        void *			outData )
{
	return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}

//	Highpass2::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Highpass2::Initialize()
{
    ComponentResult result = AUEffectBase::Initialize();
    if (result == noErr)
        Reset(kAudioUnitScope_Global, 0);
    return result;
}

#pragma mark ____Highpass2EffectKernel



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Highpass2::Highpass2Kernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void		Highpass2::Highpass2Kernel::Reset()
{
	iirSampleA = 0.0;
	iirSampleB = 0.0;
	iirSampleC = 0.0;
	iirSampleD = 0.0;
	iirSampleE = 0.0;
	iirSampleF = 0.0;
	iirSampleG = 0.0;
	iirSampleH = 0.0;
	fpd = 17;
	fpFlip = true;
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	Highpass2::Highpass2Kernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void		Highpass2::Highpass2Kernel::Process(	const Float32 	*inSourceP,
                                                    Float32		 	*inDestP,
                                                    UInt32 			inFramesToProcess,
                                                    UInt32			inNumChannels, 
                                                    bool			&ioSilence )
{
	UInt32 nSampleFrames = inFramesToProcess;
	const Float32 *sourceP = inSourceP;
	Float32 *destP = inDestP;
	Float64 iirAmount = pow(GetParameter( kParam_One ),4);
	Float64 tight = GetParameter( kParam_Two );	
	if (iirAmount < 0.0000001) iirAmount = 0.0000001;
	if (iirAmount > 1) iirAmount = 1;
	if (tight < 0.0) tight *= 0.5;
	Float64 offset;
	Float64 aWet = 1.0;
	Float64 bWet = 1.0;
	Float64 cWet = 1.0;
	Float64 dWet = GetParameter( kParam_Three );
	//four-stage wet/dry control using progressive stages that bypass when not engaged
	if (dWet < 1.0) {aWet = dWet; bWet = 0.0; cWet = 0.0; dWet = 0.0;}
	else if (dWet < 2.0) {bWet = dWet - 1.0; cWet = 0.0; dWet = 0.0;}
	else if (dWet < 3.0) {cWet = dWet - 2.0; dWet = 0.0;}
	else {dWet -= 3.0;}
	//this is one way to make a little set of dry/wet stages that are successively added to the
	//output as the control is turned up. Each one independently goes from 0-1 and stays at 1
	//beyond that point: this is a way to progressively add a 'black box' sound processing
	//which lets you fall through to simpler processing at lower settings.
	Float64 wet = GetParameter( kParam_Four );
	
	while (nSampleFrames-- > 0) {
		long double inputSample = *sourceP;
		
		static int noisesource = 0;
		int residue;
		double applyresidue;
		noisesource = noisesource % 1700021; noisesource++;
		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;
		applyresidue = residue;
		applyresidue *= 0.00000001;
		applyresidue *= 0.00000001;
		inputSample += applyresidue;
		if (inputSample<1.2e-38 && -inputSample<1.2e-38) {
			inputSample -= applyresidue;
		}
		//for live air, we always apply the dither noise. Then, if our result is 
		//effectively digital black, we'll subtract it again. We want a 'air' hiss
		long double drySample = inputSample;
				
		if (tight > 0) offset = (1 - tight) + (fabs(inputSample)*tight);
		else offset = (1 + tight) + ((1-fabs(inputSample))*tight);
		if (offset < 0.0000001) offset = 0.0000001; if (offset > 1) offset = 1;

		if (fpFlip)
		{
			if (aWet > 0.0) {
				iirSampleA = (iirSampleA * (1 - (offset * iirAmount))) + (inputSample * (offset * iirAmount));
				inputSample = ((inputSample-iirSampleA) * aWet) + (inputSample * (1.0-aWet));
			}
			if (bWet > 0.0) {
				iirSampleC = (iirSampleC * (1 - (offset * iirAmount))) + (inputSample * (offset * iirAmount));
				inputSample = ((inputSample-iirSampleC) * bWet) + (inputSample * (1.0-bWet));
			}
			if (cWet > 0.0) {
				iirSampleE = (iirSampleE * (1 - (offset * iirAmount))) + (inputSample * (offset * iirAmount));
				inputSample = ((inputSample-iirSampleE) * cWet) + (inputSample * (1.0-cWet));
			}
			if (dWet > 0.0) {
				iirSampleG = (iirSampleG * (1 - (offset * iirAmount))) + (inputSample * (offset * iirAmount));
				inputSample = ((inputSample-iirSampleG) * dWet) + (inputSample * (1.0-dWet));
			}
		}
		else
		{
			if (aWet > 0.0) {
				iirSampleB = (iirSampleB * (1 - (offset * iirAmount))) + (inputSample * (offset * iirAmount));
				inputSample = ((inputSample-iirSampleB) * aWet) + (inputSample * (1.0-aWet));
			}
			if (bWet > 0.0) {
				iirSampleD = (iirSampleD * (1 - (offset * iirAmount))) + (inputSample * (offset * iirAmount));
				inputSample = ((inputSample-iirSampleD) * bWet) + (inputSample * (1.0-bWet));
			}
			if (cWet > 0.0) {
				iirSampleF = (iirSampleF * (1 - (offset * iirAmount))) + (inputSample * (offset * iirAmount));
				inputSample = ((inputSample-iirSampleF) * cWet) + (inputSample * (1.0-cWet));
			}
			if (dWet > 0.0) {
				iirSampleH = (iirSampleH * (1 - (offset * iirAmount))) + (inputSample * (offset * iirAmount));
				inputSample = ((inputSample-iirSampleH) * dWet) + (inputSample * (1.0-dWet));
			}
		}
		
		if (wet !=1.0) {
			inputSample = (inputSample * wet) + (drySample * (1.0-wet));
		}
		//Dry/Wet control, defaults to the last slider
		fpFlip = !fpFlip;
		
		//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;
	}
}