/* * File: IronOxideClassic.cpp * * Version: 1.0 * * Created: 5/13/17 * * Copyright: Copyright © 2017 Airwindows, All Rights Reserved * * 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. * */ /*============================================================================= IronOxideClassic.cpp =============================================================================*/ #include "IronOxideClassic.h" //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ COMPONENT_ENTRY(IronOxideClassic) //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // IronOxideClassic::IronOxideClassic //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ IronOxideClassic::IronOxideClassic(AudioUnit component) : AUEffectBase(component) { CreateElements(); Globals()->UseIndexedParameters(kNumberOfParameters); SetParameter(kParam_One, kDefaultValue_ParamOne ); SetParameter(kParam_Two, kDefaultValue_ParamTwo ); SetParameter(kParam_Three, kDefaultValue_ParamThree ); #if AU_DEBUG_DISPATCHER mDebugDispatcher = new AUDebugDispatcher (this); #endif } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // IronOxideClassic::GetParameterValueStrings //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult IronOxideClassic::GetParameterValueStrings(AudioUnitScope inScope, AudioUnitParameterID inParameterID, CFArrayRef * outStrings) { return kAudioUnitErr_InvalidProperty; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // IronOxideClassic::GetParameterInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult IronOxideClassic::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_Decibels; outParameterInfo.minValue = -18.0; outParameterInfo.maxValue = 18.0; outParameterInfo.defaultValue = kDefaultValue_ParamOne; break; case kParam_Two: AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false); outParameterInfo.unit = kAudioUnitParameterUnit_CustomUnit; outParameterInfo.flags |= kAudioUnitParameterFlag_DisplayLogarithmic; outParameterInfo.unitName = kParameterTwoUnit; outParameterInfo.minValue = 1.5; outParameterInfo.maxValue = 150.0; outParameterInfo.defaultValue = kDefaultValue_ParamTwo; break; case kParam_Three: AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false); outParameterInfo.unit = kAudioUnitParameterUnit_Decibels; outParameterInfo.minValue = -18.0; outParameterInfo.maxValue = 18.0; outParameterInfo.defaultValue = kDefaultValue_ParamThree; break; default: result = kAudioUnitErr_InvalidParameter; break; } } else { result = kAudioUnitErr_InvalidParameter; } return result; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // IronOxideClassic::GetPropertyInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult IronOxideClassic::GetPropertyInfo (AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, UInt32 & outDataSize, Boolean & outWritable) { return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // IronOxideClassic::GetProperty //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult IronOxideClassic::GetProperty( AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, void * outData ) { return AUEffectBase::GetProperty (inID, inScope, inElement, outData); } // IronOxideClassic::Initialize //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult IronOxideClassic::Initialize() { ComponentResult result = AUEffectBase::Initialize(); if (result == noErr) Reset(kAudioUnitScope_Global, 0); return result; } #pragma mark ____IronOxideClassicEffectKernel //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // IronOxideClassic::IronOxideClassicKernel::Reset() //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void IronOxideClassic::IronOxideClassicKernel::Reset() { for (int temp = 0; temp < 263; temp++) {d[temp] = 0.0;} gcount = 0; fastIIRA = fastIIRB = slowIIRA = slowIIRB = 0.0; iirSampleA = iirSampleB = 0.0; fpNShape = 0.0; fpFlip = true; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // IronOxideClassic::IronOxideClassicKernel::Process //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void IronOxideClassic::IronOxideClassicKernel::Process( const Float32 *inSourceP, Float32 *inDestP, UInt32 inFramesToProcess, UInt32 inNumChannels, bool &ioSilence ) { UInt32 nSampleFrames = inFramesToProcess; const Float32 *sourceP = inSourceP; Float32 *destP = inDestP; Float64 inputgain = pow(10.0,GetParameter( kParam_One )/20.0); Float64 outputgain = pow(10.0,GetParameter( kParam_Three )/20.0); Float64 ips = GetParameter( kParam_Two ) * 1.1; //slight correction to dial in convincing ips settings if (ips < 1 || ips > 200){ips=33.0;} //sanity checks are always key Float64 iirAmount = ips/430.0; //for low leaning Float64 bridgerectifier; Float64 fastTaper = ips/15.0; Float64 slowTaper = 2.0/(ips*ips); Float64 lowspeedscale = (5.0/ips); long double inputSample; SInt32 count; Float64 temp; Float64 overallscale = 1.0; overallscale /= 44100.0; overallscale *= GetSampleRate(); if (overallscale == 0) {fastTaper += 1.0; slowTaper += 1.0;} else { iirAmount /= overallscale; lowspeedscale *= overallscale; fastTaper = 1.0 + (fastTaper / overallscale); slowTaper = 1.0 + (slowTaper / overallscale); } while (nSampleFrames-- > 0) { inputSample = *sourceP; if (inputSample<1.2e-38 && -inputSample<1.2e-38) { static int noisesource = 0; //this declares a variable before anything else is compiled. It won't keep assigning //it to 0 for every sample, it's as if the declaration doesn't exist in this context, //but it lets me add this denormalization fix in a single place rather than updating //it in three different locations. The variable isn't thread-safe but this is only //a random seed and we can share it with whatever. noisesource = noisesource % 1700021; noisesource++; int residue = noisesource * noisesource; residue = residue % 170003; residue *= residue; residue = residue % 17011; residue *= residue; residue = residue % 1709; residue *= residue; residue = residue % 173; residue *= residue; residue = residue % 17; double applyresidue = residue; applyresidue *= 0.00000001; applyresidue *= 0.00000001; inputSample = applyresidue; //this denormalization routine produces a white noise at -300 dB which the noise //shaping will interact with to produce a bipolar output, but the noise is actually //all positive. That should stop any variables from going denormal, and the routine //only kicks in if digital black is input. As a final touch, if you save to 24-bit //the silence will return to being digital black again. } if (fpFlip) { iirSampleA = (iirSampleA * (1 - iirAmount)) + (inputSample * iirAmount); inputSample -= iirSampleA; } else { iirSampleB = (iirSampleB * (1 - iirAmount)) + (inputSample * iirAmount); inputSample -= iirSampleB; } //do IIR highpass for leaning out if (inputgain != 1.0) inputSample *= inputgain; bridgerectifier = fabs(inputSample); if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; bridgerectifier = sin(bridgerectifier); if (inputSample > 0.0) inputSample = bridgerectifier; else inputSample = -bridgerectifier; if (gcount < 0 || gcount > 131) {gcount = 131;} count = gcount; //increment the counter d[count+131] = d[count] = inputSample; if (fpFlip) { fastIIRA = fastIIRA/fastTaper; slowIIRA = slowIIRA/slowTaper; //scale stuff down fastIIRA += d[count]; count += 3; temp = d[count+127]; temp += d[count+113]; temp += d[count+109]; temp += d[count+107]; temp += d[count+103]; temp += d[count+101]; temp += d[count+97]; temp += d[count+89]; temp += d[count+83]; temp /= 2; temp += d[count+79]; temp += d[count+73]; temp += d[count+71]; temp += d[count+67]; temp += d[count+61]; temp += d[count+59]; temp += d[count+53]; temp += d[count+47]; temp += d[count+43]; temp += d[count+41]; temp += d[count+37]; temp += d[count+31]; temp += d[count+29]; temp /= 2; temp += d[count+23]; temp += d[count+19]; temp += d[count+17]; temp += d[count+13]; temp += d[count+11]; temp /= 2; temp += d[count+7]; temp += d[count+5]; temp += d[count+3]; temp /= 2; temp += d[count+2]; temp += d[count+1]; slowIIRA += (temp/128); inputSample = fastIIRA - (slowIIRA / slowTaper); } else { fastIIRB = fastIIRB/fastTaper; slowIIRB = slowIIRB/slowTaper; //scale stuff down fastIIRB += d[count]; count += 3; temp = d[count+127]; temp += d[count+113]; temp += d[count+109]; temp += d[count+107]; temp += d[count+103]; temp += d[count+101]; temp += d[count+97]; temp += d[count+89]; temp += d[count+83]; temp /= 2; temp += d[count+79]; temp += d[count+73]; temp += d[count+71]; temp += d[count+67]; temp += d[count+61]; temp += d[count+59]; temp += d[count+53]; temp += d[count+47]; temp += d[count+43]; temp += d[count+41]; temp += d[count+37]; temp += d[count+31]; temp += d[count+29]; temp /= 2; temp += d[count+23]; temp += d[count+19]; temp += d[count+17]; temp += d[count+13]; temp += d[count+11]; temp /= 2; temp += d[count+7]; temp += d[count+5]; temp += d[count+3]; temp /= 2; temp += d[count+2]; temp += d[count+1]; slowIIRB += (temp/128); inputSample = fastIIRB - (slowIIRB / slowTaper); } inputSample /= fastTaper; inputSample /= lowspeedscale; bridgerectifier = fabs(inputSample); if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; bridgerectifier = sin(bridgerectifier); //can use as an output limiter if (inputSample > 0.0) inputSample = bridgerectifier; else inputSample = -bridgerectifier; //second stage of overdrive to prevent overs and allow bloody loud extremeness if (outputgain != 1.0) inputSample *= outputgain; fpFlip = !fpFlip; //32 bit dither, made small and tidy. int expon; frexpf((Float32)inputSample, &expon); long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62); inputSample += (dither-fpNShape); fpNShape = dither; //end 32 bit dither *destP = inputSample; sourceP += inNumChannels; destP += inNumChannels; } }