/*
* File: Baxandall.cpp
*
* Version: 1.0
*
* Created: 12/22/19
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/*=============================================================================
Baxandall.cpp
=============================================================================*/
#include "Baxandall.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(Baxandall)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Baxandall::Baxandall
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Baxandall::Baxandall(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
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Baxandall::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Baxandall::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Baxandall::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Baxandall::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 = -15.0;
outParameterInfo.maxValue = 15.0;
outParameterInfo.defaultValue = kDefaultValue_ParamOne;
break;
case kParam_Two:
AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Decibels;
outParameterInfo.minValue = -15.0;
outParameterInfo.maxValue = 15.0;
outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
break;
case kParam_Three:
AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Decibels;
outParameterInfo.minValue = -15.0;
outParameterInfo.maxValue = 15.0;
outParameterInfo.defaultValue = kDefaultValue_ParamThree;
break;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Baxandall::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Baxandall::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Baxandall::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Baxandall::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// Baxandall::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Baxandall::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____BaxandallEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Baxandall::BaxandallKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Baxandall::BaxandallKernel::Reset()
{
for (int x = 0; x < 9; x++) {
trebleA[x] = 0.0;
trebleB[x] = 0.0;
bassA[x] = 0.0;
bassB[x] = 0.0;
}
flip = false;
fpd = 17;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Baxandall::BaxandallKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Baxandall::BaxandallKernel::Process( const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence )
{
UInt32 nSampleFrames = inFramesToProcess;
const Float32 *sourceP = inSourceP;
Float32 *destP = inDestP;
Float64 trebleGain = pow(10.0,GetParameter( kParam_One )/20.0);
Float64 trebleFreq = (4410.0*trebleGain)/GetSampleRate();
if (trebleFreq > 0.45) trebleFreq = 0.45;
trebleA[0] = trebleB[0] = trebleFreq;
Float64 bassGain = pow(10.0,GetParameter( kParam_Two )/20.0);
Float64 bassFreq = pow(10.0,-GetParameter( kParam_Two )/20.0);
bassFreq = (4410.0*bassFreq)/GetSampleRate();
if (bassFreq > 0.45) bassFreq = 0.45;
bassA[0] = bassB[0] = bassFreq;
trebleA[1] = trebleB[1] = 0.4;
bassA[1] = bassB[1] = 0.2;
Float64 output = pow(10.0,GetParameter( kParam_Three )/20.0);
double K = tan(M_PI * trebleA[0]);
double norm = 1.0 / (1.0 + K / trebleA[1] + K * K);
trebleB[2] = trebleA[2] = K * K * norm;
trebleB[3] = trebleA[3] = 2.0 * trebleA[2];
trebleB[4] = trebleA[4] = trebleA[2];
trebleB[5] = trebleA[5] = 2.0 * (K * K - 1.0) * norm;
trebleB[6] = trebleA[6] = (1.0 - K / trebleA[1] + K * K) * norm;
K = tan(M_PI * bassA[0]);
norm = 1.0 / (1.0 + K / bassA[1] + K * K);
bassB[2] = bassA[2] = K * K * norm;
bassB[3] = bassA[3] = 2.0 * bassA[2];
bassB[4] = bassA[4] = bassA[2];
bassB[5] = bassA[5] = 2.0 * (K * K - 1.0) * norm;
bassB[6] = bassA[6] = (1.0 - K / bassA[1] + K * K) * norm;
while (nSampleFrames-- > 0) {
long double inputSample = *sourceP;
if (fabs(inputSample)<1.18e-37) inputSample = fpd * 1.18e-37;
if (output != 1.0) {
inputSample *= output;
}//gain trim in front of plugin, in case Console stage clips
inputSample = sin(inputSample);
//encode Console5: good cleanness
long double trebleSample;
long double bassSample;
if (flip)
{
trebleSample = (inputSample * trebleA[2]) + trebleA[7];
trebleA[7] = (inputSample * trebleA[3]) - (trebleSample * trebleA[5]) + trebleA[8];
trebleA[8] = (inputSample * trebleA[4]) - (trebleSample * trebleA[6]);
trebleSample = inputSample - trebleSample;
bassSample = (inputSample * bassA[2]) + bassA[7];
bassA[7] = (inputSample * bassA[3]) - (bassSample * bassA[5]) + bassA[8];
bassA[8] = (inputSample * bassA[4]) - (bassSample * bassA[6]);
}
else
{
trebleSample = (inputSample * trebleB[2]) + trebleB[7];
trebleB[7] = (inputSample * trebleB[3]) - (trebleSample * trebleB[5]) + trebleB[8];
trebleB[8] = (inputSample * trebleB[4]) - (trebleSample * trebleB[6]);
trebleSample = inputSample - trebleSample;
bassSample = (inputSample * bassB[2]) + bassB[7];
bassB[7] = (inputSample * bassB[3]) - (bassSample * bassB[5]) + bassB[8];
bassB[8] = (inputSample * bassB[4]) - (bassSample * bassB[6]);
}
flip = !flip;
trebleSample *= trebleGain;
bassSample *= bassGain;
inputSample = bassSample + trebleSample; //interleaved biquad
if (inputSample > 1.0) inputSample = 1.0;
if (inputSample < -1.0) inputSample = -1.0;
//without this, you can get a NaN condition where it spits out DC offset at full blast!
inputSample = asin(inputSample);
//amplitude aspect
//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;
}
}
