/*
* File: Holt.cpp
*
* Version: 1.0
*
* Created: 2/4/19
*
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/*=============================================================================
Holt.cpp
=============================================================================*/
#include "Holt.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(Holt)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Holt::Holt
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Holt::Holt(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 );
SetParameter(kParam_Five, kDefaultValue_ParamFive );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Holt::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Holt::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Holt::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Holt::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 = 0.0;
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;
case kParam_Five:
AUBase::FillInParameterName (outParameterInfo, kParameterFiveName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamFive;
break;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Holt::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Holt::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Holt::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Holt::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// Holt::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Holt::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____HoltEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Holt::HoltKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Holt::HoltKernel::Reset()
{
previousSampleA = 0.0;
previousTrendA = 0.0;
previousSampleB = 0.0;
previousTrendB = 0.0;
previousSampleC = 0.0;
previousTrendC = 0.0;
previousSampleD = 0.0;
previousTrendD = 0.0;
fpNShape = 0.0;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Holt::HoltKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Holt::HoltKernel::Process( const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence )
{
UInt32 nSampleFrames = inFramesToProcess;
const Float32 *sourceP = inSourceP;
Float32 *destP = inDestP;
Float64 alpha = pow(GetParameter( kParam_One ),4)+0.00001;
if (alpha > 1.0) alpha = 1.0;
Float64 beta = (alpha * pow(GetParameter( kParam_Two ),2))+0.00001;
alpha += ((1.0-beta)*pow(GetParameter( kParam_One ),3)); //correct for droop in frequency
if (alpha > 1.0) alpha = 1.0;
long double trend;
long double forecast; //defining these here because we're copying the routine four times
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 gain = GetParameter( kParam_Four );
Float64 wet = GetParameter( kParam_Five );
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 (aWet > 0.0) {
trend = (beta * (inputSample - previousSampleA) + ((0.999-beta) * previousTrendA));
forecast = previousSampleA + previousTrendA;
inputSample = (alpha * inputSample) + ((0.999-alpha) * forecast);
previousSampleA = inputSample; previousTrendA = trend;
inputSample = (inputSample * aWet) + (drySample * (1.0-aWet));
}
if (bWet > 0.0) {
trend = (beta * (inputSample - previousSampleB) + ((0.999-beta) * previousTrendB));
forecast = previousSampleB + previousTrendB;
inputSample = (alpha * inputSample) + ((0.999-alpha) * forecast);
previousSampleB = inputSample; previousTrendB = trend;
inputSample = (inputSample * bWet) + (previousSampleA * (1.0-bWet));
}
if (cWet > 0.0) {
trend = (beta * (inputSample - previousSampleC) + ((0.999-beta) * previousTrendC));
forecast = previousSampleC + previousTrendC;
inputSample = (alpha * inputSample) + ((0.999-alpha) * forecast);
previousSampleC = inputSample; previousTrendC = trend;
inputSample = (inputSample * cWet) + (previousSampleB * (1.0-cWet));
}
if (dWet > 0.0) {
trend = (beta * (inputSample - previousSampleD) + ((0.999-beta) * previousTrendD));
forecast = previousSampleD + previousTrendD;
inputSample = (alpha * inputSample) + ((0.999-alpha) * forecast);
previousSampleD = inputSample; previousTrendD = trend;
inputSample = (inputSample * dWet) + (previousSampleC * (1.0-dWet));
}
if (gain < 1.0) {
inputSample *= gain;
}
//clip to 1.2533141373155 to reach maximum output
if (inputSample > 1.2533141373155) inputSample = 1.2533141373155;
if (inputSample < -1.2533141373155) inputSample = -1.2533141373155;
inputSample = sin(inputSample * fabs(inputSample)) / ((inputSample == 0.0) ?1:fabs(inputSample));
if (wet < 1.0) {
inputSample = (inputSample*wet)+(drySample*(1.0-wet));
}
//32 bit dither, made small and tidy.
int expon; frexpf((Float32)inputSample, &expon);
long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
inputSample += (dither-fpNShape); fpNShape = dither;
//end 32 bit dither
*destP = inputSample;
sourceP += inNumChannels; destP += inNumChannels;
}
}