/* * File: ZRegion.cpp * * Version: 1.0 * * Created: 9/5/22 * * Copyright: Copyright © 2022 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. * */ /*============================================================================= ZRegion.cpp =============================================================================*/ #include "ZRegion.h" //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ COMPONENT_ENTRY(ZRegion) //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // ZRegion::ZRegion //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ZRegion::ZRegion(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 ); SetParameter(kParam_Five, kDefaultValue_ParamFive ); #if AU_DEBUG_DISPATCHER mDebugDispatcher = new AUDebugDispatcher (this); #endif } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // ZRegion::GetParameterValueStrings //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult ZRegion::GetParameterValueStrings(AudioUnitScope inScope, AudioUnitParameterID inParameterID, CFArrayRef * outStrings) { return kAudioUnitErr_InvalidProperty; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // ZRegion::GetParameterInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult ZRegion::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; case kParam_Five: AUBase::FillInParameterName (outParameterInfo, kParameterFiveName, false); outParameterInfo.unit = kAudioUnitParameterUnit_Generic; outParameterInfo.minValue = 0.0; outParameterInfo.maxValue = 1.0; outParameterInfo.defaultValue = kDefaultValue_ParamFive; break; default: result = kAudioUnitErr_InvalidParameter; break; } } else { result = kAudioUnitErr_InvalidParameter; } return result; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // ZRegion::GetPropertyInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult ZRegion::GetPropertyInfo (AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, UInt32 & outDataSize, Boolean & outWritable) { return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // ZRegion::GetProperty //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult ZRegion::GetProperty( AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, void * outData ) { return AUEffectBase::GetProperty (inID, inScope, inElement, outData); } // ZRegion::Initialize //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult ZRegion::Initialize() { ComponentResult result = AUEffectBase::Initialize(); if (result == noErr) Reset(kAudioUnitScope_Global, 0); return result; } #pragma mark ____ZRegionEffectKernel //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // ZRegion::ZRegionKernel::Reset() //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void ZRegion::ZRegionKernel::Reset() { for (int x = 0; x < 11; x++) {biquad[x] = 0.0; biquadA[x] = 0.0; biquadB[x] = 0.0; biquadC[x] = 0.0; biquadD[x] = 0.0; biquadE[x] = 0.0; biquadF[x] = 0.0;} iirSampleA = 0.0; fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // ZRegion::ZRegionKernel::Process //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void ZRegion::ZRegionKernel::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(); //begin from XRegion Float64 high = GetParameter( kParam_Two ); Float64 low = GetParameter( kParam_Three ); Float64 mid = (high+low)*0.5; Float64 spread = 1.001-fabs(high-low); biquad[0] = (pow(high,3)*20000.0)/GetSampleRate(); if (biquad[0] < 0.00009) biquad[0] = 0.00009; Float64 compensation = sqrt(biquad[0])*6.4*spread; Float64 clipFactor = 0.75+(biquad[0]*GetParameter( kParam_Four )*37.0); biquadA[0] = (pow((high+mid)*0.5,3)*20000.0)/GetSampleRate(); if (biquadA[0] < 0.00009) biquadA[0] = 0.00009; Float64 compensationA = sqrt(biquadA[0])*6.4*spread; Float64 clipFactorA = 0.75+(biquadA[0]*GetParameter( kParam_Four )*37.0); biquadB[0] = (pow(mid,3)*20000.0)/GetSampleRate(); if (biquadB[0] < 0.00009) biquadB[0] = 0.00009; Float64 compensationB = sqrt(biquadB[0])*6.4*spread; Float64 clipFactorB = 0.75+(biquadB[0]*GetParameter( kParam_Four )*37.0); biquadC[0] = (pow((mid+low)*0.5,3)*20000.0)/GetSampleRate(); if (biquadC[0] < 0.00009) biquadC[0] = 0.00009; Float64 compensationC = sqrt(biquadC[0])*6.4*spread; Float64 clipFactorC = 0.75+(biquadC[0]*GetParameter( kParam_Four )*37.0); biquadD[0] = (pow(low,3)*20000.0)/GetSampleRate(); if (biquadD[0] < 0.00009) biquadD[0] = 0.00009; Float64 compensationD = sqrt(biquadD[0])*6.4*spread; Float64 clipFactorD = 0.75+(biquadD[0]*GetParameter( kParam_Four )*37.0); double K = tan(M_PI * biquad[0]); double norm = 1.0 / (1.0 + K / 0.7071 + K * K); biquad[2] = K / 0.7071 * norm; biquad[4] = -biquad[2]; biquad[5] = 2.0 * (K * K - 1.0) * norm; biquad[6] = (1.0 - K / 0.7071 + K * K) * norm; K = tan(M_PI * biquadA[0]); norm = 1.0 / (1.0 + K / 0.7071 + K * K); biquadA[2] = K / 0.7071 * norm; biquadA[4] = -biquadA[2]; biquadA[5] = 2.0 * (K * K - 1.0) * norm; biquadA[6] = (1.0 - K / 0.7071 + K * K) * norm; K = tan(M_PI * biquadB[0]); norm = 1.0 / (1.0 + K / 0.7071 + K * K); biquadB[2] = K / 0.7071 * norm; biquadB[4] = -biquadB[2]; biquadB[5] = 2.0 * (K * K - 1.0) * norm; biquadB[6] = (1.0 - K / 0.7071 + K * K) * norm; K = tan(M_PI * biquadC[0]); norm = 1.0 / (1.0 + K / 0.7071 + K * K); biquadC[2] = K / 0.7071 * norm; biquadC[4] = -biquadC[2]; biquadC[5] = 2.0 * (K * K - 1.0) * norm; biquadC[6] = (1.0 - K / 0.7071 + K * K) * norm; K = tan(M_PI * biquadD[0]); norm = 1.0 / (1.0 + K / 0.7071 + K * K); biquadD[2] = K / 0.7071 * norm; biquadD[4] = -biquadD[2]; biquadD[5] = 2.0 * (K * K - 1.0) * norm; biquadD[6] = (1.0 - K / 0.7071 + K * K) * norm; //opamp stuff double inTrim = GetParameter( kParam_One )*10.0; inTrim *= inTrim; inTrim *= inTrim; double iirAmountA = 0.00069/overallscale; biquadF[0] = biquadE[0] = 15500.0 / GetSampleRate(); biquadF[1] = biquadE[1] = 0.935; K = tan(M_PI * biquadE[0]); //lowpass norm = 1.0 / (1.0 + K / biquadE[1] + K * K); biquadE[2] = K * K * norm; biquadE[3] = 2.0 * biquadE[2]; biquadE[4] = biquadE[2]; biquadE[5] = 2.0 * (K * K - 1.0) * norm; biquadE[6] = (1.0 - K / biquadE[1] + K * K) * norm; for (int x = 0; x < 7; x++) biquadF[x] = biquadE[x]; //end opamp stuff double aWet = 1.0; double bWet = 1.0; double cWet = 1.0; double dWet = GetParameter( kParam_Four )*4.0; //four-stage wet/dry control using progressive stages that bypass when not engaged if (dWet < 1.0) {aWet = dWet; bWet = 0.0; cWet = 0.0; dWet = 0.0;} else if (dWet < 2.0) {bWet = dWet - 1.0; cWet = 0.0; dWet = 0.0;} else if (dWet < 3.0) {cWet = dWet - 2.0; dWet = 0.0;} else {dWet -= 3.0;} //this is one way to make a little set of dry/wet stages that are successively added to the //output as the control is turned up. Each one independently goes from 0-1 and stays at 1 //beyond that point: this is a way to progressively add a 'black box' sound processing //which lets you fall through to simpler processing at lower settings. double wet = GetParameter( kParam_Five ); double outSample = 0.0; while (nSampleFrames-- > 0) { double inputSample = *sourceP; if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17; double drySample = inputSample; double overallDrySample = drySample; if (inTrim != 1.0) inputSample *= inTrim; double nukeLevel = inputSample; //begin XRegion inputSample *= clipFactor; if (inputSample > 1.57079633) inputSample = 1.57079633; if (inputSample < -1.57079633) inputSample = -1.57079633; inputSample = sin(inputSample); outSample = biquad[2]*inputSample+biquad[4]*biquad[8]-biquad[5]*biquad[9]-biquad[6]*biquad[10]; biquad[8] = biquad[7]; biquad[7] = inputSample; biquad[10] = biquad[9]; biquad[9] = outSample; //DF1 inputSample = outSample / compensation; nukeLevel = inputSample; if (aWet > 0.0) { inputSample *= clipFactorA; if (inputSample > 1.57079633) inputSample = 1.57079633; if (inputSample < -1.57079633) inputSample = -1.57079633; inputSample = sin(inputSample); outSample = biquadA[2]*inputSample+biquadA[4]*biquadA[8]-biquadA[5]*biquadA[9]-biquadA[6]*biquadA[10]; biquadA[8] = biquadA[7]; biquadA[7] = inputSample; biquadA[10] = biquadA[9]; biquadA[9] = outSample; //DF1 inputSample = outSample / compensationA; inputSample = (inputSample * aWet) + (nukeLevel * (1.0-aWet)); nukeLevel = inputSample; } if (bWet > 0.0) { inputSample *= clipFactorB; if (inputSample > 1.57079633) inputSample = 1.57079633; if (inputSample < -1.57079633) inputSample = -1.57079633; inputSample = sin(inputSample); outSample = biquadB[2]*inputSample+biquadB[4]*biquadB[8]-biquadB[5]*biquadB[9]-biquadB[6]*biquadB[10]; biquadB[8] = biquadB[7]; biquadB[7] = inputSample; biquadB[10] = biquadB[9]; biquadB[9] = outSample; //DF1 inputSample = outSample / compensationB; inputSample = (inputSample * bWet) + (nukeLevel * (1.0-bWet)); nukeLevel = inputSample; } if (cWet > 0.0) { inputSample *= clipFactorC; if (inputSample > 1.57079633) inputSample = 1.57079633; if (inputSample < -1.57079633) inputSample = -1.57079633; inputSample = sin(inputSample); outSample = biquadC[2]*inputSample+biquadC[4]*biquadC[8]-biquadC[5]*biquadC[9]-biquadC[6]*biquadC[10]; biquadC[8] = biquadC[7]; biquadC[7] = inputSample; biquadC[10] = biquadC[9]; biquadC[9] = outSample; //DF1 inputSample = outSample / compensationC; inputSample = (inputSample * cWet) + (nukeLevel * (1.0-cWet)); nukeLevel = inputSample; } if (dWet > 0.0) { inputSample *= clipFactorD; if (inputSample > 1.57079633) inputSample = 1.57079633; if (inputSample < -1.57079633) inputSample = -1.57079633; inputSample = sin(inputSample); outSample = biquadD[2]*inputSample+biquadD[4]*biquadD[8]-biquadD[5]*biquadD[9]-biquadD[6]*biquadD[10]; biquadD[8] = biquadD[7]; biquadD[7] = inputSample; biquadD[10] = biquadD[9]; biquadD[9] = outSample; //DF1 inputSample = outSample / compensationD; inputSample = (inputSample * dWet) + (nukeLevel * (1.0-dWet)); } //end XRegion //opamp stage if (fabs(iirSampleA)<1.18e-37) iirSampleA = 0.0; iirSampleA = (iirSampleA * (1.0 - iirAmountA)) + (inputSample * iirAmountA); inputSample -= iirSampleA; outSample = biquadE[2]*inputSample+biquadE[3]*biquadE[7]+biquadE[4]*biquadE[8]-biquadE[5]*biquadE[9]-biquadE[6]*biquadE[10]; biquadE[8] = biquadE[7]; biquadE[7] = inputSample; inputSample = outSample; biquadE[10] = biquadE[9]; biquadE[9] = inputSample; //DF1 if (inputSample > 1.0) inputSample = 1.0; if (inputSample < -1.0) inputSample = -1.0; inputSample -= (inputSample*inputSample*inputSample*inputSample*inputSample*0.1768); outSample = biquadF[2]*inputSample+biquadF[3]*biquadF[7]+biquadF[4]*biquadF[8]-biquadF[5]*biquadF[9]-biquadF[6]*biquadF[10]; biquadF[8] = biquadF[7]; biquadF[7] = inputSample; inputSample = outSample; biquadF[10] = biquadF[9]; biquadF[9] = inputSample; //DF1 //end opamp stage if (wet !=1.0) { inputSample = (inputSample * wet) + (overallDrySample * (1.0-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; } }