/* * 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. 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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, * REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER * 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" //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ COMPONENT_ENTRY(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] 1.0) { bezCompS[bez_cycle] -= 1.0; if (bezCompS[bez_SampL] 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; }