/*
* File: Pop.cpp
*
* Version: 1.0
*
* Created: 10/9/10
*
* Copyright: Copyright � 2010 Airwindows, All Rights Reserved
*
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*/
/*=============================================================================
Pop.h
=============================================================================*/
#include "Pop.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(Pop)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Pop::Pop
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Pop::Pop(AudioUnit component)
: AUEffectBase(component)
{
CreateElements();
Globals()->UseIndexedParameters(kNumberOfParameters);
SetParameter(kParam_One, kDefaultValue_ParamOne );
SetParameter(kParam_Two, kDefaultValue_ParamTwo );
SetParameter(kParam_Three, kDefaultValue_ParamThree );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Pop::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Pop::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Pop::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Pop::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 = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamThree;
break;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Pop::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Pop::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Pop::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Pop::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Pop::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Pop::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____PopEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Pop::PopKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Pop::PopKernel::Reset()
{
for(int count = 0; count < 10000; count++) {d[count] = 0;}
delay = 0;
muSpeedA = 10000;
muSpeedB = 10000;
muCoefficientA = 1;
muCoefficientB = 1;
thicken = 1;
muVary = 1;
flip = false;
previous = 0.0;
previous2 = 0.0;
previous3 = 0.0;
previous4 = 0.0;
previous5 = 0.0;
fpNShape = 0.0;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Pop::PopKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Pop::PopKernel::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 highGainOffset = pow(GetParameter( kParam_One ),2)*0.023;
Float64 threshold = 1.001 - (1.0-pow(1.0-GetParameter( kParam_One ),5));
Float64 muMakeupGain = sqrt(1.0 / threshold);
//gain settings around threshold
Float64 release = (GetParameter( kParam_One )*100000.0) + 300000.0;
int maxdelay = (int)(1450.0 * overallscale);
if (maxdelay > 9999) maxdelay = 9999;
release /= overallscale;
Float64 fastest = sqrt(release);
//speed settings around release
Float64 output = GetParameter( kParam_Two );
Float64 wet = GetParameter( kParam_Three );
// � � � � � � � � � � � � is the kitten song o/~
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;
d[delay] = inputSample;
delay--;
if (delay < 0 || delay > maxdelay) {delay = maxdelay;}
//yes this is a second bounds check. it's cheap, check EVERY time
inputSample = (inputSample * thicken) + (d[delay] * (1.0-thicken));
long double lowestSample = inputSample;
if (fabs(inputSample) > fabs(previous)) lowestSample = previous;
if (fabs(lowestSample) > fabs(previous2)) lowestSample = (lowestSample + previous2) / 1.99;
if (fabs(lowestSample) > fabs(previous3)) lowestSample = (lowestSample + previous3) / 1.98;
if (fabs(lowestSample) > fabs(previous4)) lowestSample = (lowestSample + previous4) / 1.97;
if (fabs(lowestSample) > fabs(previous5)) lowestSample = (lowestSample + previous5) / 1.96;
previous5 = previous4;
previous4 = previous3;
previous3 = previous2;
previous2 = previous;
previous = inputSample;
inputSample *= muMakeupGain;
Float64 punchiness = 0.95-fabs(inputSample*0.08);
if (punchiness < 0.65) punchiness = 0.65;
if (flip)
{
if (fabs(lowestSample) > threshold)
{
muVary = threshold / fabs(lowestSample);
muAttack = sqrt(fabs(muSpeedA));
muCoefficientA = muCoefficientA * (muAttack-1.0);
if (muVary < threshold)
{
muCoefficientA = muCoefficientA + threshold;
}
else
{
muCoefficientA = muCoefficientA + muVary;
}
muCoefficientA = muCoefficientA / muAttack;
}
else
{
muCoefficientA = muCoefficientA * ((muSpeedA * muSpeedA)-1.0);
muCoefficientA = muCoefficientA + 1.0;
muCoefficientA = muCoefficientA / (muSpeedA * muSpeedA);
}
muNewSpeed = muSpeedA * (muSpeedA-1);
muNewSpeed = muNewSpeed + fabs(lowestSample*release)+fastest;
muSpeedA = muNewSpeed / muSpeedA;
}
else
{
if (fabs(lowestSample) > threshold)
{
muVary = threshold / fabs(lowestSample);
muAttack = sqrt(fabs(muSpeedB));
muCoefficientB = muCoefficientB * (muAttack-1);
if (muVary < threshold)
{
muCoefficientB = muCoefficientB + threshold;
}
else
{
muCoefficientB = muCoefficientB + muVary;
}
muCoefficientB = muCoefficientB / muAttack;
}
else
{
muCoefficientB = muCoefficientB * ((muSpeedB * muSpeedB)-1.0);
muCoefficientB = muCoefficientB + 1.0;
muCoefficientB = muCoefficientB / (muSpeedB * muSpeedB);
}
muNewSpeed = muSpeedB * (muSpeedB-1);
muNewSpeed = muNewSpeed + fabs(lowestSample*release)+fastest;
muSpeedB = muNewSpeed / muSpeedB;
}
//got coefficients, adjusted speeds
long double coefficient = highGainOffset;
if (flip) coefficient += pow(muCoefficientA,2);
else coefficient += pow(muCoefficientB,2);
inputSample *= coefficient;
thicken = (coefficient/5)+punchiness;//0.80;
thicken = (1.0-wet)+(wet*thicken);
//applied compression with vari-vari-�-�-�-�-�-�-is-the-kitten-song o/~
//applied gain correction to control output level- tends to constrain sound rather than inflate it
long double bridgerectifier = fabs(inputSample);
if (bridgerectifier > 1.2533141373155) bridgerectifier = 1.2533141373155;
bridgerectifier = sin(bridgerectifier * fabs(bridgerectifier)) / ((bridgerectifier == 0.0) ?1:fabs(bridgerectifier));
//using Spiral instead of Density algorithm
if (inputSample > 0) inputSample = (inputSample*coefficient)+(bridgerectifier*(1-coefficient));
else inputSample = (inputSample*coefficient)-(bridgerectifier*(1-coefficient));
//second stage of overdrive to prevent overs and allow bloody loud extremeness
flip = !flip;
if (output < 1.0) inputSample *= output;
if (wet < 1.0) inputSample = (drySample*(1.0-wet))+(inputSample*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;
}
}
