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Globals()->UseIndexedParameters(kNumberOfParameters); SetParameter(kParam_One, kDefaultValue_ParamOne ); SetParameter(kParam_Two, kDefaultValue_ParamTwo ); SetParameter(kParam_Three, kDefaultValue_ParamThree ); SetParameter(kParam_Four, kDefaultValue_ParamFour ); #if AU_DEBUG_DISPATCHER mDebugDispatcher = new AUDebugDispatcher (this); #endif } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Capacitor2::GetParameterValueStrings //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Capacitor2::GetParameterValueStrings(AudioUnitScope inScope, AudioUnitParameterID inParameterID, CFArrayRef * outStrings) { return kAudioUnitErr_InvalidProperty; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Capacitor2::GetParameterInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Capacitor2::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_Generic; outParameterInfo.minValue = 0.0; outParameterInfo.maxValue = 1.0; outParameterInfo.defaultValue = kDefaultValue_ParamOne; break; case kParam_Two: AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false); outParameterInfo.unit = kAudioUnitParameterUnit_Generic; outParameterInfo.minValue = 0.0; outParameterInfo.maxValue = 1.0; outParameterInfo.defaultValue = kDefaultValue_ParamTwo; break; case kParam_Three: AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false); outParameterInfo.unit = kAudioUnitParameterUnit_Generic; outParameterInfo.minValue = 0.0; outParameterInfo.maxValue = 1.0; outParameterInfo.defaultValue = kDefaultValue_ParamThree; break; case kParam_Four: AUBase::FillInParameterName (outParameterInfo, kParameterFourName, false); outParameterInfo.unit = kAudioUnitParameterUnit_Generic; outParameterInfo.minValue = 0.0; outParameterInfo.maxValue = 1.0; outParameterInfo.defaultValue = kDefaultValue_ParamFour; break; default: result = kAudioUnitErr_InvalidParameter; break; } } else { result = kAudioUnitErr_InvalidParameter; } return result; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Capacitor2::GetPropertyInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Capacitor2::GetPropertyInfo (AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, UInt32 & outDataSize, Boolean & outWritable) { return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Capacitor2::GetProperty //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Capacitor2::GetProperty( AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, void * outData ) { return AUEffectBase::GetProperty (inID, inScope, inElement, outData); } // Capacitor2::Initialize //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Capacitor2::Initialize() { ComponentResult result = AUEffectBase::Initialize(); if (result == noErr) Reset(kAudioUnitScope_Global, 0); return result; } #pragma mark ____Capacitor2EffectKernel //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Capacitor2::Capacitor2Kernel::Reset() //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void Capacitor2::Capacitor2Kernel::Reset() { iirHighpassA = 0.0; iirHighpassB = 0.0; iirHighpassC = 0.0; iirHighpassD = 0.0; iirHighpassE = 0.0; iirHighpassF = 0.0; iirLowpassA = 0.0; iirLowpassB = 0.0; iirLowpassC = 0.0; iirLowpassD = 0.0; iirLowpassE = 0.0; iirLowpassF = 0.0; count = 0; lowpassChase = 0.0; highpassChase = 0.0; wetChase = 0.0; lowpassBaseAmount = 1.0; highpassBaseAmount = 0.0; wet = 1.0; lastLowpass = 1000.0; lastHighpass = 1000.0; lastWet = 1000.0; fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Capacitor2::Capacitor2Kernel::Process //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void Capacitor2::Capacitor2Kernel::Process( const Float32 *inSourceP, Float32 *inDestP, UInt32 inFramesToProcess, UInt32 inNumChannels, bool &ioSilence ) { UInt32 nSampleFrames = inFramesToProcess; const Float32 *sourceP = inSourceP; Float32 *destP = inDestP; lowpassChase = pow(GetParameter( kParam_One ),2); highpassChase = pow(GetParameter( kParam_Two ),2); Float64 nonLin = 1.0+((1.0-GetParameter( kParam_Three ))*6.0); Float64 nonLinTrim = 1.5/cbrt(nonLin); wetChase = GetParameter( kParam_Four ); //should not scale with sample rate, because values reaching 1 are important //to its ability to bypass when set to max Float64 lowpassSpeed = 300 / (fabs( lastLowpass - lowpassChase)+1.0); Float64 highpassSpeed = 300 / (fabs( lastHighpass - highpassChase)+1.0); Float64 wetSpeed = 300 / (fabs( lastWet - wetChase)+1.0); lastLowpass = lowpassChase; lastHighpass = highpassChase; lastWet = wetChase; while (nSampleFrames-- > 0) { double inputSample = *sourceP; if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17; double drySample = inputSample; Float64 dielectricScale = fabs(2.0-((inputSample+nonLin)/nonLin)); lowpassBaseAmount = (((lowpassBaseAmount*lowpassSpeed)+lowpassChase)/(lowpassSpeed + 1.0)); Float64 lowpassAmount = lowpassBaseAmount * dielectricScale; //positive voltage will mean lower capacitance when capacitor is barium titanate //on the lowpass, higher pressure means positive swings/smaller cap/larger value for lowpassAmount Float64 invLowpass = 1.0 - lowpassAmount; highpassBaseAmount = (((highpassBaseAmount*highpassSpeed)+highpassChase)/(highpassSpeed + 1.0)); Float64 highpassAmount = highpassBaseAmount * dielectricScale; //positive voltage will mean lower capacitance when capacitor is barium titanate //on the highpass, higher pressure means positive swings/smaller cap/larger value for highpassAmount Float64 invHighpass = 1.0 - highpassAmount; wet = (((wet*wetSpeed)+wetChase)/(wetSpeed+1.0)); count++; if (count > 5) count = 0; switch (count) { case 0: iirHighpassA = (iirHighpassA * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassA; iirLowpassA = (iirLowpassA * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassA; iirHighpassB = (iirHighpassB * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassB; iirLowpassB = (iirLowpassB * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassB; iirHighpassD = (iirHighpassD * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassD; iirLowpassD = (iirLowpassD * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassD; break; case 1: iirHighpassA = (iirHighpassA * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassA; iirLowpassA = (iirLowpassA * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassA; iirHighpassC = (iirHighpassC * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassC; iirLowpassC = (iirLowpassC * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassC; iirHighpassE = (iirHighpassE * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassE; iirLowpassE = (iirLowpassE * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassE; break; case 2: iirHighpassA = (iirHighpassA * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassA; iirLowpassA = (iirLowpassA * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassA; iirHighpassB = (iirHighpassB * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassB; iirLowpassB = (iirLowpassB * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassB; iirHighpassF = (iirHighpassF * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassF; iirLowpassF = (iirLowpassF * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassF; break; case 3: iirHighpassA = (iirHighpassA * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassA; iirLowpassA = (iirLowpassA * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassA; iirHighpassC = (iirHighpassC * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassC; iirLowpassC = (iirLowpassC * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassC; iirHighpassD = (iirHighpassD * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassD; iirLowpassD = (iirLowpassD * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassD; break; case 4: iirHighpassA = (iirHighpassA * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassA; iirLowpassA = (iirLowpassA * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassA; iirHighpassB = (iirHighpassB * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassB; iirLowpassB = (iirLowpassB * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassB; iirHighpassE = (iirHighpassE * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassE; iirLowpassE = (iirLowpassE * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassE; break; case 5: iirHighpassA = (iirHighpassA * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassA; iirLowpassA = (iirLowpassA * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassA; iirHighpassC = (iirHighpassC * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassC; iirLowpassC = (iirLowpassC * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassC; iirHighpassF = (iirHighpassF * invHighpass) + (inputSample * highpassAmount); inputSample -= iirHighpassF; iirLowpassF = (iirLowpassF * invLowpass) + (inputSample * lowpassAmount); inputSample = iirLowpassF; break; } //Highpass Filter chunk. This is three poles of IIR highpass, with a 'gearbox' that progressively //steepens the filter after minimizing artifacts. inputSample = (drySample * (1.0-wet)) + (inputSample * nonLinTrim * wet); //begin 32 bit floating point dither int expon; frexpf((float)inputSample, &expon); fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5; inputSample += static_cast(fpd) * 5.960464655174751e-36L * pow(2,expon+62); //end 32 bit floating point dither *destP = inputSample; sourceP += inNumChannels; destP += inNumChannels; } }