/* * File: Density2.cpp * * Version: 1.0 * * Created: 2/8/21 * * Copyright: Copyright © 2021 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. * */ /*============================================================================= Density2.cpp =============================================================================*/ #include "Density2.h" //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ AUDIOCOMPONENT_ENTRY(AUBaseFactory, Density2) //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Density2::Density2 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Density2::Density2(AudioUnit component) : AUEffectBase(component) { CreateElements(); 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 } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Density2::GetParameterValueStrings //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Density2::GetParameterValueStrings(AudioUnitScope inScope, AudioUnitParameterID inParameterID, CFArrayRef * outStrings) { return kAudioUnitErr_InvalidProperty; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Density2::GetParameterInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Density2::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 = -1.0; outParameterInfo.maxValue = 4.0; 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; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Density2::GetPropertyInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Density2::GetPropertyInfo (AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, UInt32 & outDataSize, Boolean & outWritable) { return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Density2::GetProperty //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Density2::GetProperty( AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, void * outData ) { return AUEffectBase::GetProperty (inID, inScope, inElement, outData); } // Density2::Initialize //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Density2::Initialize() { ComponentResult result = AUEffectBase::Initialize(); if (result == noErr) Reset(kAudioUnitScope_Global, 0); return result; } #pragma mark ____Density2EffectKernel //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Density2::Density2Kernel::Reset() //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void Density2::Density2Kernel::Reset() { ataA = ataB = ataC = lastDiffSample = 0.0; iirSampleA = iirSampleB = last3Sample = last2Sample = last1Sample = 0.0; fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Density2::Density2Kernel::Process //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void Density2::Density2Kernel::Process( const Float32 *inSourceP, Float32 *inDestP, UInt32 inFramesToProcess, UInt32 inNumChannels, bool &ioSilence ) { UInt32 nSampleFrames = inFramesToProcess; const Float32 *sourceP = inSourceP; Float32 *destP = inDestP; double overallscale = 1.0; overallscale /= 44100.0; overallscale *= GetSampleRate(); Float64 density = GetParameter( kParam_One ); Float64 out = fabs(density); while (out > 1.0) out = out - 1.0; density = density * fabs(density); Float64 iirAmount = pow(GetParameter( kParam_Two ),3)/overallscale; Float64 output = GetParameter( kParam_Three ); Float64 wet = GetParameter( kParam_Four ); while (nSampleFrames-- > 0) { double inputSample = *sourceP; if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17; double drySample = inputSample; double halfwaySample = (inputSample + last1Sample + ((-last2Sample + last3Sample) * 0.0414213562373095048801688)) / 2.0; double halfDrySample = halfwaySample; last3Sample = last2Sample; last2Sample = last1Sample; last1Sample = inputSample; iirSampleB = (iirSampleB * (1.0 - iirAmount)) + (halfwaySample * iirAmount); halfwaySample -= iirSampleB; //highpass section double count = density; double bridgerectifier; while (count > 1.0) { bridgerectifier = fabs(halfwaySample)*1.57079633; if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; bridgerectifier = sin(bridgerectifier); if (halfwaySample > 0.0) halfwaySample = bridgerectifier; else halfwaySample = -bridgerectifier; count = count - 1.0; } bridgerectifier = fabs(halfwaySample)*1.57079633; if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; if (density > 0) bridgerectifier = sin(bridgerectifier); else bridgerectifier = 1-cos(bridgerectifier); //produce either boosted or starved version if (halfwaySample > 0) halfwaySample = (halfwaySample*(1.0-out))+(bridgerectifier*out); else halfwaySample = (halfwaySample*(1.0-out))-(bridgerectifier*out); //blend according to density control ataC = halfwaySample - halfDrySample; ataA *= 0.915965594177219015; ataB *= 0.915965594177219015; ataB += ataC; ataA -= ataC; ataC = ataB; double halfDiffSample = ataC * 0.915965594177219015; iirSampleA = (iirSampleA * (1.0 - iirAmount)) + (inputSample * iirAmount); inputSample -= iirSampleA; //highpass section count = density; while (count > 1.0) { bridgerectifier = fabs(inputSample)*1.57079633; if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; bridgerectifier = sin(bridgerectifier); if (inputSample > 0.0) inputSample = bridgerectifier; else inputSample = -bridgerectifier; count = count - 1.0; } bridgerectifier = fabs(inputSample)*1.57079633; if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; if (density > 0) bridgerectifier = sin(bridgerectifier); else bridgerectifier = 1-cos(bridgerectifier); //produce either boosted or starved version if (inputSample > 0) inputSample = (inputSample*(1-out))+(bridgerectifier*out); else inputSample = (inputSample*(1-out))-(bridgerectifier*out); //blend according to density control ataC = inputSample - drySample; ataA *= 0.915965594177219015; ataB *= 0.915965594177219015; ataA += ataC; ataB -= ataC; ataC = ataA; double diffSample = ataC * 0.915965594177219015; inputSample = drySample + ((diffSample + halfDiffSample + lastDiffSample) / 1.187); lastDiffSample = diffSample / 2.0; inputSample *= output; inputSample = (drySample*(1.0-wet))+(inputSample*wet); //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; } }