/*
* File: ChromeOxide.cpp
*
* Version: 1.0
*
* Created: 1/11/20
*
* Copyright: Copyright � 2020 Airwindows, All Rights Reserved
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/*=============================================================================
ChromeOxide.cpp
=============================================================================*/
#include "ChromeOxide.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(ChromeOxide)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ChromeOxide::ChromeOxide
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ChromeOxide::ChromeOxide(AudioUnit component)
: AUEffectBase(component)
{
CreateElements();
Globals()->UseIndexedParameters(kNumberOfParameters);
SetParameter(kParam_One, kDefaultValue_ParamOne );
SetParameter(kParam_Two, kDefaultValue_ParamTwo );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ChromeOxide::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult ChromeOxide::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ChromeOxide::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult ChromeOxide::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;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ChromeOxide::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult ChromeOxide::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ChromeOxide::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult ChromeOxide::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// ChromeOxide::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult ChromeOxide::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____ChromeOxideEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ChromeOxide::ChromeOxideKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void ChromeOxide::ChromeOxideKernel::Reset()
{
iirSampleA = 0.0;
iirSampleB = 0.0;
iirSampleC = 0.0;
iirSampleD = 0.0;
flip = false;
secondSample = 0.0;
thirdSample = 0.0;
fourthSample = 0.0;
fifthSample = 0.0;
fpd = 17;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ChromeOxide::ChromeOxideKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void ChromeOxide::ChromeOxideKernel::Process( const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence )
{
UInt32 nSampleFrames = inFramesToProcess;
const Float32 *sourceP = inSourceP;
Float32 *destP = inDestP;
Float64 overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= GetSampleRate();
Float64 bassSample;
Float64 randy;
Float64 bias = GetParameter( kParam_Two )/1.31578947368421;
Float64 intensity = 0.9+pow(GetParameter( kParam_One ),2);
Float64 iirAmount = pow(1.0-(intensity/(10+(bias*4.0))),2)/overallscale;
//make 10 higher for less trashy sound in high settings
Float64 bridgerectifier;
Float64 trebleGainTrim = 1.0;
Float64 indrive = 1.0;
Float64 densityA = (intensity*80)+1.0;
Float64 noise = intensity/(1.0+bias);
Float64 bassGainTrim = 1.0;
Float64 glitch = 0.0;
bias *= overallscale;
noise *= overallscale;
if (intensity > 1.0)
{
glitch = intensity-1.0;
indrive = intensity*intensity;
bassGainTrim /= (intensity*intensity);
trebleGainTrim = (intensity+1.0)/2.0;
}
//everything runs off Intensity now
while (nSampleFrames-- > 0) {
long double inputSample = *sourceP;
if (fabs(inputSample)<1.18e-37) inputSample = fpd * 1.18e-37;
inputSample *= indrive;
bassSample = inputSample;
if (flip)
{
iirSampleA = (iirSampleA * (1 - iirAmount)) + (inputSample * iirAmount);
inputSample -= iirSampleA;
}
else
{
iirSampleB = (iirSampleB * (1 - iirAmount)) + (inputSample * iirAmount);
inputSample -= iirSampleB;
}
//highpass section
bassSample -= (inputSample * (fabs(inputSample) * glitch) * (fabs(inputSample) * glitch) );
//overdrive the bass channel
if (flip)
{
iirSampleC = (iirSampleC * (1 - iirAmount)) + (bassSample * iirAmount);
bassSample = iirSampleC;
}
else
{
iirSampleD = (iirSampleD * (1 - iirAmount)) + (bassSample * iirAmount);
bassSample = iirSampleD;
}
//bass filter same as high but only after the clipping
flip = !flip;
bridgerectifier = inputSample;
//insanity check
randy = bias+((rand()/(double)RAND_MAX)*noise);
if ((randy >= 0.0)&&(randy < 1.0)) bridgerectifier = (inputSample * randy)+(secondSample * (1.0-randy));
if ((randy >= 1.0)&&(randy < 2.0)) bridgerectifier = (secondSample * (randy-1.0))+(thirdSample * (2.0-randy));
if ((randy >= 2.0)&&(randy < 3.0)) bridgerectifier = (thirdSample * (randy-2.0))+(fourthSample * (3.0-randy));
if ((randy >= 3.0)&&(randy < 4.0)) bridgerectifier = (fourthSample * (randy-3.0))+(fifthSample * (4.0-randy));
fifthSample = fourthSample;
fourthSample = thirdSample;
thirdSample = secondSample;
secondSample = inputSample;
//high freq noise/flutter section
inputSample = bridgerectifier;
//apply overall, or just to the distorted bit? if the latter, below says 'fabs bridgerectifier'
bridgerectifier = fabs(inputSample)*densityA;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
bridgerectifier = sin(bridgerectifier);
if (inputSample > 0) inputSample = bridgerectifier/densityA;
else inputSample = -bridgerectifier/densityA;
//blend according to densityA control
inputSample *= trebleGainTrim;
bassSample *= bassGainTrim;
inputSample += bassSample;
//that simple.
//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;
}
}
