/* * File: PurestConsole4Channel.cpp * * Version: 1.0 * * Created: 5/7/26 * * Copyright: Copyright © 2026 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. * */ /*============================================================================= PurestConsole4Channel.cpp =============================================================================*/ #include "PurestConsole4Channel.h" //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ AUDIOCOMPONENT_ENTRY(AUBaseFactory, PurestConsole4Channel) //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // PurestConsole4Channel::PurestConsole4Channel //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ PurestConsole4Channel::PurestConsole4Channel(AudioUnit component) : AUEffectBase(component) { CreateElements(); Globals()->UseIndexedParameters(kNumberOfParameters); SetParameter(kParam_SMO, kDefaultValue_ParamSMO ); SetParameter(kParam_PAN, kDefaultValue_ParamPAN ); SetParameter(kParam_FAD, kDefaultValue_ParamFAD ); #if AU_DEBUG_DISPATCHER mDebugDispatcher = new AUDebugDispatcher (this); #endif } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // PurestConsole4Channel::GetParameterValueStrings //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult PurestConsole4Channel::GetParameterValueStrings(AudioUnitScope inScope, AudioUnitParameterID inParameterID, CFArrayRef * outStrings) { return kAudioUnitErr_InvalidProperty; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // PurestConsole4Channel::GetParameterInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult PurestConsole4Channel::GetParameterInfo(AudioUnitScope inScope, AudioUnitParameterID inParameterID, AudioUnitParameterInfo &outParameterInfo ) { ComponentResult result = noErr; outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable | kAudioUnitParameterFlag_IsReadable; if (inScope == kAudioUnitScope_Global) { switch(inParameterID) { case kParam_SMO: AUBase::FillInParameterName (outParameterInfo, kParameterSMOName, false); outParameterInfo.unit = kAudioUnitParameterUnit_Generic; outParameterInfo.minValue = 0.0; outParameterInfo.maxValue = 1.0; outParameterInfo.defaultValue = kDefaultValue_ParamSMO; break; case kParam_PAN: AUBase::FillInParameterName (outParameterInfo, kParameterPANName, false); outParameterInfo.unit = kAudioUnitParameterUnit_Generic; outParameterInfo.minValue = 0.0; outParameterInfo.maxValue = 1.0; outParameterInfo.defaultValue = kDefaultValue_ParamPAN; break; case kParam_FAD: AUBase::FillInParameterName (outParameterInfo, kParameterFADName, false); outParameterInfo.unit = kAudioUnitParameterUnit_Generic; outParameterInfo.minValue = 0.0; outParameterInfo.maxValue = 1.0; outParameterInfo.defaultValue = kDefaultValue_ParamFAD; break; default: result = kAudioUnitErr_InvalidParameter; break; } } else { result = kAudioUnitErr_InvalidParameter; } return result; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // PurestConsole4Channel::GetPropertyInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult PurestConsole4Channel::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 PurestConsole4Channel::SupportedNumChannels(const AUChannelInfo ** outInfo) { if (outInfo != NULL) { static AUChannelInfo info; info.inChannels = 2; info.outChannels = 2; *outInfo = &info; } return 1; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // PurestConsole4Channel::GetProperty //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult PurestConsole4Channel::GetProperty( AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, void * outData ) { return AUEffectBase::GetProperty (inID, inScope, inElement, outData); } // PurestConsole4Channel::Initialize //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult PurestConsole4Channel::Initialize() { ComponentResult result = AUEffectBase::Initialize(); if (result == noErr) Reset(kAudioUnitScope_Global, 0); return result; } #pragma mark ____PurestConsole4ChannelEffectKernel //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // PurestConsole4Channel::PurestConsole4ChannelKernel::Reset() //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult PurestConsole4Channel::Reset(AudioUnitScope inScope, AudioUnitElement inElement) { for (int x = 0; x < bezier_total; x++) bezier[x] = 0.0; fpdL = 1.0; while (fpdL < 16386) fpdL = rand()*UINT32_MAX; fpdR = 1.0; while (fpdR < 16386) fpdR = rand()*UINT32_MAX; return noErr; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // PurestConsole4Channel::ProcessBufferLists //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ OSStatus PurestConsole4Channel::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 bezierRez = fmax(pow((1.0-GetParameter( kParam_SMO ))*0.25,3.0)/overallscale,0.00001); int stepped = 999999; if (bezierRez > 0.000001) stepped = (int)(1.0/bezierRez); bezierRez = 1.0/stepped; double bezierTrim = 1.0-(bezierRez*((double)stepped/(stepped+1.0))); //manages the overall Bezier control smoothing system plugin-wide and feed all controls //into bezier[] as just 0-1 values, unprocessed. do it IN the control smoothing engine 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; //begin Bezier control smoothing engine bezier[bezier_cycle] += bezierRez; if (bezier[bezier_cycle] > 1.0) {bezier[bezier_cycle] = 0.0; bezier[bezierGainL_C] = bezier[bezierGainL_B]; bezier[bezierGainL_B] = bezier[bezierGainL_A]; bezier[bezierGainR_C] = bezier[bezierGainR_B]; bezier[bezierGainR_B] = bezier[bezierGainR_A]; //one of these bucket brigade lines for every smoothed control //begin expensive control calculations double gain = GetParameter( kParam_FAD )*2.0; if (gain > 1.0) gain *= gain; if (gain < 1.0) gain = 1.0-pow(1.0-gain,2); gain *= 0.763932022500211; bezier[bezierGainL_A] = gain*sin(M_PI_2-(GetParameter( kParam_PAN )*M_PI_2)); bezier[bezierGainR_A] = gain*sin(GetParameter( kParam_PAN )*M_PI_2); //end expensive control calculations } double lerp = bezier[bezier_cycle]*bezierTrim; bezier[bezierGainL_Out] = bezier[bezierGainL_B]+(bezier[bezierGainL_C]*(1.0-lerp)*(1.0-lerp))+(bezier[bezierGainL_B]*2.0*(1.0-lerp)*lerp)+(bezier[bezierGainL_A]*lerp*lerp); bezier[bezierGainR_Out] = bezier[bezierGainR_B]+(bezier[bezierGainR_C]*(1.0-lerp)*(1.0-lerp))+(bezier[bezierGainR_B]*2.0*(1.0-lerp)*lerp)+(bezier[bezierGainR_A]*lerp*lerp); //end Bezier control smoothing engine inputSampleL *= bezier[bezierGainL_Out]; inputSampleR *= bezier[bezierGainR_Out]; inputSampleL = fmax(fmin(inputSampleL,M_PI_2),-M_PI_2); inputSampleR = fmax(fmin(inputSampleR,M_PI_2),-M_PI_2); long double X = inputSampleL; X *= X; //long double for even long double temp = inputSampleL * X; //the initial multiplies inputSampleL -= temp*0.16666666666666666666666666666666666; temp *= X; inputSampleL += temp*0.00833333333333333333333333333333333; temp *= X; inputSampleL -= temp*0.00019841269841269841269841269841269; temp *= X; inputSampleL += temp*0.00000275573192239858906525573192239; temp *= X; inputSampleL -= temp*0.00000002505210838544171877521083854; temp *= X; inputSampleL += temp*0.00000000016059043836821614599392377; temp *= X; inputSampleL -= temp*0.00000000000076471637318198164759011; temp *= X; inputSampleL += temp*0.00000000000000281145725434552076319; temp *= X; inputSampleL -= temp*0.00000000000000000822063524662432971; temp *= X; inputSampleL += temp*0.00000000000000000001957294106339126; X = inputSampleR; X *= X; //long double for even temp = inputSampleR * X; //the initial multiplies inputSampleR -= temp*0.16666666666666666666666666666666666; temp *= X; inputSampleR += temp*0.00833333333333333333333333333333333; temp *= X; inputSampleR -= temp*0.00019841269841269841269841269841269; temp *= X; inputSampleR += temp*0.00000275573192239858906525573192239; temp *= X; inputSampleR -= temp*0.00000002505210838544171877521083854; temp *= X; inputSampleR += temp*0.00000000016059043836821614599392377; temp *= X; inputSampleR -= temp*0.00000000000076471637318198164759011; temp *= X; inputSampleR += temp*0.00000000000000281145725434552076319; temp *= X; inputSampleR -= temp*0.00000000000000000822063524662432971; temp *= X; inputSampleR += temp*0.00000000000000000001957294106339126; //retain mantissa of a long double increasing power function //long double probably doesn't handle more than 36 digits or so //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)) * 3.553e-44l * pow(2,expon+62)); frexpf((float)inputSampleR, &expon); fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5; if (fpdL-fpdR < 1073741824 || fpdR-fpdL < 1073741824) { fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;} inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 3.553e-44l * 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; }