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airwindows/plugins/MacSignedAU/Dynamics2/Dynamics2.cpp
Christopher Johnson 55a9a9549c PearEQ
2025-10-04 20:47:21 -04:00

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/*
* File: Dynamics2.cpp
*
* Version: 1.0
*
* Created: 9/20/25
*
* Copyright: Copyright © 2025 Airwindows, Airwindows uses the MIT license
*
* Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in
* consideration of your agreement to the following terms, and your use, installation, modification
* or redistribution of this Apple software constitutes acceptance of these terms. If you do
* not agree with these terms, please do not use, install, modify or redistribute this Apple
* software.
*
* In consideration of your agreement to abide by the following terms, and subject to these terms,
* Apple grants you a personal, non-exclusive license, under Apple's copyrights in this
* original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the
* Apple Software, with or without modifications, in source and/or binary forms; provided that if you
* redistribute the Apple Software in its entirety and without modifications, you must retain this
* notice and the following text and disclaimers in all such redistributions of the Apple Software.
* Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to
* endorse or promote products derived from the Apple Software without specific prior written
* permission from Apple. Except as expressly stated in this notice, no other rights or
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* Apple Software may be incorporated.
*
* The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR
* IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE
* OR IN COMBINATION WITH YOUR PRODUCTS.
*
* IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
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* UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN
* IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*=============================================================================
Dynamics2.cpp
=============================================================================*/
#include "Dynamics2.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
AUDIOCOMPONENT_ENTRY(AUBaseFactory, Dynamics2)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Dynamics2::Dynamics2
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dynamics2::Dynamics2(AudioUnit component)
: AUEffectBase(component)
{
CreateElements();
Globals()->UseIndexedParameters(kNumberOfParameters);
SetParameter(kParam_A, kDefaultValue_ParamA );
SetParameter(kParam_B, kDefaultValue_ParamB );
SetParameter(kParam_C, kDefaultValue_ParamC );
SetParameter(kParam_D, kDefaultValue_ParamD );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Dynamics2::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Dynamics2::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Dynamics2::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Dynamics2::GetParameterInfo(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
AudioUnitParameterInfo &outParameterInfo )
{
ComponentResult result = noErr;
outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
| kAudioUnitParameterFlag_IsReadable;
if (inScope == kAudioUnitScope_Global) {
switch(inParameterID)
{
case kParam_A:
AUBase::FillInParameterName (outParameterInfo, kParameterAName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamA;
break;
case kParam_B:
AUBase::FillInParameterName (outParameterInfo, kParameterBName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamB;
break;
case kParam_C:
AUBase::FillInParameterName (outParameterInfo, kParameterCName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamC;
break;
case kParam_D:
AUBase::FillInParameterName (outParameterInfo, kParameterDName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamD;
break;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Dynamics2::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Dynamics2::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// state that plugin supports only stereo-in/stereo-out processing
UInt32 Dynamics2::SupportedNumChannels(const AUChannelInfo ** outInfo)
{
if (outInfo != NULL)
{
static AUChannelInfo info;
info.inChannels = 2;
info.outChannels = 2;
*outInfo = &info;
}
return 1;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Dynamics2::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Dynamics2::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// Dynamics2::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Dynamics2::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____Dynamics2EffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Dynamics2::Dynamics2Kernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Dynamics2::Reset(AudioUnitScope inScope, AudioUnitElement inElement)
{
for (int x = 0; x < bez_total; x++) {bezCompF[x] = 0.0;bezCompS[x] = 0.0;}
bezCompF[bez_cycle] = 1.0; bezMaxF = 0.0;
bezCompS[bez_cycle] = 1.0; bezGate = 2.0;
fpdL = 1.0; while (fpdL < 16386) fpdL = rand()*UINT32_MAX;
fpdR = 1.0; while (fpdR < 16386) fpdR = rand()*UINT32_MAX;
return noErr;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Dynamics2::ProcessBufferLists
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
OSStatus Dynamics2::ProcessBufferLists(AudioUnitRenderActionFlags & ioActionFlags,
const AudioBufferList & inBuffer,
AudioBufferList & outBuffer,
UInt32 inFramesToProcess)
{
Float32 * inputL = (Float32*)(inBuffer.mBuffers[0].mData);
Float32 * inputR = (Float32*)(inBuffer.mBuffers[1].mData);
Float32 * outputL = (Float32*)(outBuffer.mBuffers[0].mData);
Float32 * outputR = (Float32*)(outBuffer.mBuffers[1].mData);
UInt32 nSampleFrames = inFramesToProcess;
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= GetSampleRate();
double bezCThresh = pow(1.0-GetParameter( kParam_A ), 6.0) * 8.0;
double bezRez = pow(1.0-GetParameter( kParam_B ), 8.0) / overallscale;
double sloRez = pow(1.0-GetParameter( kParam_C ),12.0) / overallscale;
sloRez = fmin(fmax(sloRez-(bezRez*0.5),0.00001),1.0);
bezRez = fmin(fmax(bezRez,0.0001),1.0);
double gate = pow(pow(GetParameter( kParam_D ),4.0),sqrt(bezCThresh+1.0));
while (nSampleFrames-- > 0) {
double inputSampleL = *inputL;
double inputSampleR = *inputR;
if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
if (fmax(fabs(inputSampleL),fabs(inputSampleR)) > gate+(sloRez*bezGate)) bezGate = ((bezGate*overallscale*3.0)+3.0)*(0.25/overallscale);
else bezGate = fmax(0.0, bezGate-(sloRez*sloRez));
if (bezCThresh > 0.0) {
inputSampleL *= ((bezCThresh*0.5)+1.0);
inputSampleR *= ((bezCThresh*0.5)+1.0);
}
bezCompF[bez_cycle] += bezRez;
bezCompF[bez_SampL] += (fabs(inputSampleL) * bezRez);
bezCompF[bez_SampR] += (fabs(inputSampleR) * bezRez);
bezMaxF = fmax(bezMaxF,fmax(fabs(inputSampleL),fabs(inputSampleR)));
if (bezCompF[bez_cycle] > 1.0) {
bezCompF[bez_cycle] -= 1.0;
if (bezMaxF < gate) bezCompF[bez_SampL] = bezMaxF/gate; //note: SampL is a control voltage,
if (bezCompF[bez_SampL]<gate) bezCompF[bez_SampL] = 0.0; //not a bipolar audio signal
bezCompF[bez_CL] = bezCompF[bez_BL];
bezCompF[bez_BL] = bezCompF[bez_AL];
bezCompF[bez_AL] = bezCompF[bez_SampL];
bezCompF[bez_SampL] = 0.0;
if (bezMaxF < gate) bezCompF[bez_SampR] = bezMaxF/gate; //note: SampR is a control voltage,
if (bezCompF[bez_SampR]<gate) bezCompF[bez_SampR] = 0.0; //not a bipolar audio signal
bezCompF[bez_CR] = bezCompF[bez_BR];
bezCompF[bez_BR] = bezCompF[bez_AR];
bezCompF[bez_AR] = bezCompF[bez_SampR];
bezCompF[bez_SampR] = 0.0;
bezMaxF = 0.0;
}
bezCompS[bez_cycle] += sloRez;
bezCompS[bez_SampL] += (fabs(inputSampleL) * sloRez); //note: SampL is a control voltage
bezCompS[bez_SampR] += (fabs(inputSampleR) * sloRez); //note: SampR is a control voltage
if (bezCompS[bez_cycle] > 1.0) {
bezCompS[bez_cycle] -= 1.0;
if (bezCompS[bez_SampL]<gate) bezCompS[bez_SampL] = 0.0;
bezCompS[bez_CL] = bezCompS[bez_BL];
bezCompS[bez_BL] = bezCompS[bez_AL];
bezCompS[bez_AL] = bezCompS[bez_SampL];
bezCompS[bez_SampL] = 0.0;
if (bezCompS[bez_SampR]<gate) bezCompS[bez_SampR] = 0.0;
bezCompS[bez_CR] = bezCompS[bez_BR];
bezCompS[bez_BR] = bezCompS[bez_AR];
bezCompS[bez_AR] = bezCompS[bez_SampR];
bezCompS[bez_SampR] = 0.0;
}
double CBFL = (bezCompF[bez_CL]*(1.0-bezCompF[bez_cycle]))+(bezCompF[bez_BL]*bezCompF[bez_cycle]);
double BAFL = (bezCompF[bez_BL]*(1.0-bezCompF[bez_cycle]))+(bezCompF[bez_AL]*bezCompF[bez_cycle]);
double CBAFL = (bezCompF[bez_BL]+(CBFL*(1.0-bezCompF[bez_cycle]))+(BAFL*bezCompF[bez_cycle]))*0.5;
double CBSL = (bezCompS[bez_CL]*(1.0-bezCompS[bez_cycle]))+(bezCompS[bez_BL]*bezCompS[bez_cycle]);
double BASL = (bezCompS[bez_BL]*(1.0-bezCompS[bez_cycle]))+(bezCompS[bez_AL]*bezCompS[bez_cycle]);
double CBASL = (bezCompS[bez_BL]+(CBSL*(1.0-bezCompS[bez_cycle]))+(BASL*bezCompS[bez_cycle]))*0.5;
double CBAMax = fmax(CBASL,CBAFL); if (CBAMax > 0.0) CBAMax = 1.0/CBAMax;
double CBAFade = ((CBASL*-CBAMax)+(CBAFL*CBAMax)+1.0)*0.5;
if (bezCThresh > 0.0) inputSampleL *= 1.0-(fmin(((CBASL*(1.0-CBAFade))+(CBAFL*CBAFade))*bezCThresh,1.0));
double CBFR = (bezCompF[bez_CR]*(1.0-bezCompF[bez_cycle]))+(bezCompF[bez_BR]*bezCompF[bez_cycle]);
double BAFR = (bezCompF[bez_BR]*(1.0-bezCompF[bez_cycle]))+(bezCompF[bez_AR]*bezCompF[bez_cycle]);
double CBAFR = (bezCompF[bez_BR]+(CBFR*(1.0-bezCompF[bez_cycle]))+(BAFR*bezCompF[bez_cycle]))*0.5;
double CBSR = (bezCompS[bez_CR]*(1.0-bezCompS[bez_cycle]))+(bezCompS[bez_BR]*bezCompS[bez_cycle]);
double BASR = (bezCompS[bez_BR]*(1.0-bezCompS[bez_cycle]))+(bezCompS[bez_AR]*bezCompS[bez_cycle]);
double CBASR = (bezCompS[bez_BR]+(CBSR*(1.0-bezCompS[bez_cycle]))+(BASR*bezCompS[bez_cycle]))*0.5;
CBAMax = fmax(CBASR,CBAFR); if (CBAMax > 0.0) CBAMax = 1.0/CBAMax;
CBAFade = ((CBASR*-CBAMax)+(CBAFR*CBAMax)+1.0)*0.5;
if (bezCThresh > 0.0) inputSampleR *= 1.0-(fmin(((CBASR*(1.0-CBAFade))+(CBAFR*CBAFade))*bezCThresh,1.0));
if (bezGate < 1.0 && gate > 0.0) {inputSampleL *= bezGate; inputSampleR *= bezGate;}
//begin 32 bit stereo floating point dither
int expon; frexpf((float)inputSampleL, &expon);
fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
frexpf((float)inputSampleR, &expon);
fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
//end 32 bit stereo floating point dither
*outputL = inputSampleL;
*outputR = inputSampleR;
//direct stereo out
inputL += 1;
inputR += 1;
outputL += 1;
outputR += 1;
}
return noErr;
}
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