/*
* File: EQ.cpp
*
* Version: 1.0
*
* Created: 10/26/12
*
* Copyright: Copyright � 2012 Airwindows, All Rights Reserved
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/*=============================================================================
EQ.cpp
=============================================================================*/
#include "EQ.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(EQ)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// EQ::EQ
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
EQ::EQ(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 );
SetParameter(kParam_Six, kDefaultValue_ParamSix );
SetParameter(kParam_Seven, kDefaultValue_ParamSeven );
SetParameter(kParam_Eight, kDefaultValue_ParamEight );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// EQ::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult EQ::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// EQ::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult EQ::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_Decibels;
outParameterInfo.minValue = -12.0;
outParameterInfo.maxValue = 12.0;
outParameterInfo.defaultValue = kDefaultValue_ParamOne;
break;
case kParam_Two:
AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Decibels;
outParameterInfo.minValue = -12.0;
outParameterInfo.maxValue = 12.0;
outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
break;
case kParam_Three:
AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Decibels;
outParameterInfo.minValue = -12.0;
outParameterInfo.maxValue = 12.0;
outParameterInfo.defaultValue = kDefaultValue_ParamThree;
break;
case kParam_Four:
AUBase::FillInParameterName (outParameterInfo, kParameterFourName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_CustomUnit;
outParameterInfo.flags |= kAudioUnitParameterFlag_DisplayLogarithmic;
outParameterInfo.unitName = kParameterFourUnit;
outParameterInfo.minValue = 1.0;
outParameterInfo.maxValue = 16.0;
outParameterInfo.defaultValue = kDefaultValue_ParamFour;
break;
case kParam_Five:
AUBase::FillInParameterName (outParameterInfo, kParameterFiveName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_CustomUnit;
outParameterInfo.flags |= kAudioUnitParameterFlag_DisplayLogarithmic;
outParameterInfo.unitName = kParameterFiveUnit;
outParameterInfo.minValue = 1.0;
outParameterInfo.maxValue = 16.0;
outParameterInfo.defaultValue = kDefaultValue_ParamFive;
break;
case kParam_Six:
AUBase::FillInParameterName (outParameterInfo, kParameterSixName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_CustomUnit;
outParameterInfo.flags |= kAudioUnitParameterFlag_DisplayLogarithmic;
outParameterInfo.unitName = kParameterSixUnit;
outParameterInfo.minValue = 30.0;
outParameterInfo.maxValue = 1600.0;
outParameterInfo.defaultValue = kDefaultValue_ParamSix;
break;
case kParam_Seven:
AUBase::FillInParameterName (outParameterInfo, kParameterSevenName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_CustomUnit;
outParameterInfo.flags |= kAudioUnitParameterFlag_DisplayLogarithmic;
outParameterInfo.unitName = kParameterSevenUnit;
outParameterInfo.minValue = 30.0;
outParameterInfo.maxValue = 1600.0;
outParameterInfo.defaultValue = kDefaultValue_ParamSeven;
break;
case kParam_Eight:
AUBase::FillInParameterName (outParameterInfo, kParameterEightName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Decibels;
outParameterInfo.minValue = -18.0;
outParameterInfo.maxValue = 18.0;
outParameterInfo.defaultValue = kDefaultValue_ParamEight;
break;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// EQ::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult EQ::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// EQ::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult EQ::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// EQ::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult EQ::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____EQEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// EQ::EQKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void EQ::EQKernel::Reset()
{
fpNShape = 0.0;
iirHighSampleA = 0.0;
iirHighSampleB = 0.0;
iirHighSampleC = 0.0;
iirHighSampleD = 0.0;
iirHighSampleE = 0.0;
iirLowSampleA = 0.0;
iirLowSampleB = 0.0;
iirLowSampleC = 0.0;
iirLowSampleD = 0.0;
iirLowSampleE = 0.0;
iirHighSample = 0.0;
iirLowSample = 0.0;
tripletA = 0.0;
tripletB = 0.0;
tripletC = 0.0;
tripletFactor = 0.0;
flip = false;
flipthree = 0;
lowpassSampleAA = 0.0;
lowpassSampleAB = 0.0;
lowpassSampleBA = 0.0;
lowpassSampleBB = 0.0;
lowpassSampleCA = 0.0;
lowpassSampleCB = 0.0;
lowpassSampleDA = 0.0;
lowpassSampleDB = 0.0;
lowpassSampleE = 0.0;
lowpassSampleF = 0.0;
lowpassSampleG = 0.0;
highpassSampleAA = 0.0;
highpassSampleAB = 0.0;
highpassSampleBA = 0.0;
highpassSampleBB = 0.0;
highpassSampleCA = 0.0;
highpassSampleCB = 0.0;
highpassSampleDA = 0.0;
highpassSampleDB = 0.0;
highpassSampleE = 0.0;
highpassSampleF = 0.0;
lastSample = 0.0;
last2Sample = 0.0;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// EQ::EQKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void EQ::EQKernel::Process( const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence )
{
UInt32 nSampleFrames = inFramesToProcess;
const Float32 *sourceP = inSourceP;
Float32 *destP = inDestP;
Float64 overallscale = GetSampleRate();
Float64 inputSample;
Float64 highSample = 0.0;
Float64 midSample = 0.0;
Float64 bassSample = 0.0;
Float64 densityA = GetParameter( kParam_One )/2.0;
Float64 densityB = GetParameter( kParam_Two )/2.0;
Float64 densityC = GetParameter( kParam_Three )/2.0;
densityA = pow(10.0,densityA/20.0)-1.0;
densityB = pow(10.0,densityB/20.0)-1.0;
densityC = pow(10.0,densityC/20.0)-1.0;
//convert to 0 to X multiplier with 1.0 being O db
//minus one gives nearly -1 to ? (should top out at 1)
//calibrate so that X db roughly equals X db with maximum topping out at 1 internally
Float64 tripletIntensity = -densityA;
Float64 iirAmountC = (GetParameter( kParam_Four )*0.0188) + 0.7;
if (iirAmountC > 1.0) iirAmountC = 1.0;
bool engageLowpass = false;
if (GetParameter( kParam_Four ) < 15.99) engageLowpass = true;
Float64 iirAmountA = (GetParameter( kParam_Five )*1000)/overallscale;
Float64 iirAmountB = (GetParameter( kParam_Six )*10)/overallscale;
Float64 iirAmountD = (GetParameter( kParam_Seven )*1.0)/overallscale;
bool engageHighpass = false;
if (GetParameter( kParam_Seven ) > 30.01) engageHighpass = true;
//bypass the highpass and lowpass if set to extremes
Float64 bridgerectifier;
Float64 outA = fabs(densityA);
Float64 outB = fabs(densityB);
Float64 outC = fabs(densityC);
Float64 outputgain = pow(10.0,GetParameter( kParam_Eight )/20.0);
while (nSampleFrames-- > 0) {
inputSample = *sourceP;
if (inputSample<1.2e-38 && -inputSample<1.2e-38) {
static int noisesource = 0;
//this declares a variable before anything else is compiled. It won't keep assigning
//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
//but it lets me add this denormalization fix in a single place rather than updating
//it in three different locations. The variable isn't thread-safe but this is only
//a random seed and we can share it with whatever.
noisesource = noisesource % 1700021; noisesource++;
int 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;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSample = applyresidue;
//this denormalization routine produces a white noise at -300 dB which the noise
//shaping will interact with to produce a bipolar output, but the noise is actually
//all positive. That should stop any variables from going denormal, and the routine
//only kicks in if digital black is input. As a final touch, if you save to 24-bit
//the silence will return to being digital black again.
}
last2Sample = lastSample;
lastSample = inputSample;
flip = !flip;
flipthree++;
if (flipthree < 1 || flipthree > 3) flipthree = 1;
//counters
switch (flipthree)
{
case 1:
tripletFactor = last2Sample - inputSample;
tripletA += tripletFactor;
tripletC -= tripletFactor;
tripletFactor = tripletA * tripletIntensity;
iirHighSampleC = (iirHighSampleC * (1 - iirAmountA)) + (inputSample * iirAmountA);
highSample = inputSample - iirHighSampleC;
iirLowSampleC = (iirLowSampleC * (1 - iirAmountB)) + (inputSample * iirAmountB);
bassSample = iirLowSampleC;
break;
case 2:
tripletFactor = last2Sample - inputSample;
tripletB += tripletFactor;
tripletA -= tripletFactor;
tripletFactor = tripletB * tripletIntensity;
iirHighSampleD = (iirHighSampleD * (1 - iirAmountA)) + (inputSample * iirAmountA);
highSample = inputSample - iirHighSampleD;
iirLowSampleD = (iirLowSampleD * (1 - iirAmountB)) + (inputSample * iirAmountB);
bassSample = iirLowSampleD;
break;
case 3:
tripletFactor = last2Sample - inputSample;
tripletC += tripletFactor;
tripletB -= tripletFactor;
tripletFactor = tripletC * tripletIntensity;
iirHighSampleE = (iirHighSampleE * (1 - iirAmountA)) + (inputSample * iirAmountA);
highSample = inputSample - iirHighSampleE;
iirLowSampleE = (iirLowSampleE * (1 - iirAmountB)) + (inputSample * iirAmountB);
bassSample = iirLowSampleE;
break;
}
tripletA /= 2.0;
tripletB /= 2.0;
tripletC /= 2.0;
highSample = highSample + tripletFactor;
if (flip)
{
iirHighSampleA = (iirHighSampleA * (1 - iirAmountA)) + (highSample * iirAmountA);
highSample = highSample - iirHighSampleA;
iirLowSampleA = (iirLowSampleA * (1 - iirAmountB)) + (bassSample * iirAmountB);
bassSample = iirLowSampleA;
}
else
{
iirHighSampleB = (iirHighSampleB * (1 - iirAmountA)) + (highSample * iirAmountA);
highSample = highSample - iirHighSampleB;
iirLowSampleB = (iirLowSampleB * (1 - iirAmountB)) + (bassSample * iirAmountB);
bassSample = iirLowSampleB;
}
iirHighSample = (iirHighSample * (1 - iirAmountA)) + (highSample * iirAmountA);
highSample = highSample - iirHighSample;
iirLowSample = (iirLowSample * (1 - iirAmountB)) + (bassSample * iirAmountB);
bassSample = iirLowSample;
midSample = (inputSample-bassSample)-highSample;
//drive section
highSample *= (densityA+1.0);
bridgerectifier = fabs(highSample)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (densityA > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (highSample > 0) highSample = (highSample*(1-outA))+(bridgerectifier*outA);
else highSample = (highSample*(1-outA))-(bridgerectifier*outA);
//blend according to densityA control
midSample *= (densityB+1.0);
bridgerectifier = fabs(midSample)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (densityB > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (midSample > 0) midSample = (midSample*(1-outB))+(bridgerectifier*outB);
else midSample = (midSample*(1-outB))-(bridgerectifier*outB);
//blend according to densityB control
bassSample *= (densityC+1.0);
bridgerectifier = fabs(bassSample)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (densityC > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (bassSample > 0) bassSample = (bassSample*(1-outC))+(bridgerectifier*outC);
else bassSample = (bassSample*(1-outC))-(bridgerectifier*outC);
//blend according to densityC control
inputSample = midSample;
inputSample += highSample;
inputSample += bassSample;
if (engageHighpass)
{
if (flip)
{
highpassSampleAA = (highpassSampleAA * (1 - iirAmountD)) + (inputSample * iirAmountD);
inputSample = inputSample - highpassSampleAA;
highpassSampleBA = (highpassSampleBA * (1 - iirAmountD)) + (inputSample * iirAmountD);
inputSample = inputSample - highpassSampleBA;
highpassSampleCA = (highpassSampleCA * (1 - iirAmountD)) + (inputSample * iirAmountD);
inputSample = inputSample - highpassSampleCA;
highpassSampleDA = (highpassSampleDA * (1 - iirAmountD)) + (inputSample * iirAmountD);
inputSample = inputSample - highpassSampleDA;
}
else
{
highpassSampleAB = (highpassSampleAB * (1 - iirAmountD)) + (inputSample * iirAmountD);
inputSample = inputSample - highpassSampleAB;
highpassSampleBB = (highpassSampleBB * (1 - iirAmountD)) + (inputSample * iirAmountD);
inputSample = inputSample - highpassSampleBB;
highpassSampleCB = (highpassSampleCB * (1 - iirAmountD)) + (inputSample * iirAmountD);
inputSample = inputSample - highpassSampleCB;
highpassSampleDB = (highpassSampleDB * (1 - iirAmountD)) + (inputSample * iirAmountD);
inputSample = inputSample - highpassSampleDB;
}
highpassSampleE = (highpassSampleE * (1 - iirAmountD)) + (inputSample * iirAmountD);
inputSample = inputSample - highpassSampleE;
highpassSampleF = (highpassSampleF * (1 - iirAmountD)) + (inputSample * iirAmountD);
inputSample = inputSample - highpassSampleF;
}
if (engageLowpass)
{
if (flip)
{
lowpassSampleAA = (lowpassSampleAA * (1 - iirAmountC)) + (inputSample * iirAmountC);
inputSample = lowpassSampleAA;
lowpassSampleBA = (lowpassSampleBA * (1 - iirAmountC)) + (inputSample * iirAmountC);
inputSample = lowpassSampleBA;
lowpassSampleCA = (lowpassSampleCA * (1 - iirAmountC)) + (inputSample * iirAmountC);
inputSample = lowpassSampleCA;
lowpassSampleDA = (lowpassSampleDA * (1 - iirAmountC)) + (inputSample * iirAmountC);
inputSample = lowpassSampleDA;
lowpassSampleE = (lowpassSampleE * (1 - iirAmountC)) + (inputSample * iirAmountC);
inputSample = lowpassSampleE;
}
else
{
lowpassSampleAB = (lowpassSampleAB * (1 - iirAmountC)) + (inputSample * iirAmountC);
inputSample = lowpassSampleAB;
lowpassSampleBB = (lowpassSampleBB * (1 - iirAmountC)) + (inputSample * iirAmountC);
inputSample = lowpassSampleBB;
lowpassSampleCB = (lowpassSampleCB * (1 - iirAmountC)) + (inputSample * iirAmountC);
inputSample = lowpassSampleCB;
lowpassSampleDB = (lowpassSampleDB * (1 - iirAmountC)) + (inputSample * iirAmountC);
inputSample = lowpassSampleDB;
lowpassSampleF = (lowpassSampleF * (1 - iirAmountC)) + (inputSample * iirAmountC);
inputSample = lowpassSampleF;
}
lowpassSampleG = (lowpassSampleG * (1 - iirAmountC)) + (inputSample * iirAmountC);
inputSample = (lowpassSampleG * (1 - iirAmountC)) + (inputSample * iirAmountC);
}
//built in output trim and dry/wet if desired
if (outputgain != 1.0) inputSample *= outputgain;
//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;
}
}
