/* * File: Wolfbot.cpp * * Version: 1.0 * * Created: 5/22/24 * * Copyright: Copyright © 2024 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. * */ /*============================================================================= Wolfbot.cpp =============================================================================*/ #include "Wolfbot.h" //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ COMPONENT_ENTRY(Wolfbot) //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Wolfbot::Wolfbot //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Wolfbot::Wolfbot(AudioUnit component) : AUEffectBase(component) { CreateElements(); Globals()->UseIndexedParameters(kNumberOfParameters); #if AU_DEBUG_DISPATCHER mDebugDispatcher = new AUDebugDispatcher (this); #endif } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Wolfbot::GetParameterValueStrings //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Wolfbot::GetParameterValueStrings(AudioUnitScope inScope, AudioUnitParameterID inParameterID, CFArrayRef * outStrings) { return kAudioUnitErr_InvalidProperty; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Wolfbot::GetParameterInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Wolfbot::GetParameterInfo(AudioUnitScope inScope, AudioUnitParameterID inParameterID, AudioUnitParameterInfo &outParameterInfo ) { ComponentResult result = noErr; outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable | kAudioUnitParameterFlag_IsReadable; if (inScope == kAudioUnitScope_Global) { switch(inParameterID) { default: result = kAudioUnitErr_InvalidParameter; break; } } else { result = kAudioUnitErr_InvalidParameter; } return result; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Wolfbot::GetPropertyInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Wolfbot::GetPropertyInfo (AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, UInt32 & outDataSize, Boolean & outWritable) { return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Wolfbot::GetProperty //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Wolfbot::GetProperty( AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, void * outData ) { return AUEffectBase::GetProperty (inID, inScope, inElement, outData); } // Wolfbot::Initialize //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult Wolfbot::Initialize() { ComponentResult result = AUEffectBase::Initialize(); if (result == noErr) Reset(kAudioUnitScope_Global, 0); return result; } #pragma mark ____WolfbotEffectKernel //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Wolfbot::WolfbotKernel::Reset() //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void Wolfbot::WolfbotKernel::Reset() { for (int x = 0; x < kal_total; x++) {kHP[x] = 0.0; kLP[x] = 0.0;} fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // Wolfbot::WolfbotKernel::Process //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void Wolfbot::WolfbotKernel::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(); double kalHP = 1.0-(0.004225/overallscale); double kalLP = 1.0-(0.954529/overallscale); while (nSampleFrames-- > 0) { double inputSample = *sourceP; if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17; double drySample = inputSample; //begin Kalman Filter double dryKal = inputSample = inputSample*(1.0-kalHP)*0.777; inputSample *= (1.0-kalHP); //set up gain levels to control the beast kHP[prevSlewL3] += kHP[prevSampL3] - kHP[prevSampL2]; kHP[prevSlewL3] *= 0.5; kHP[prevSlewL2] += kHP[prevSampL2] - kHP[prevSampL1]; kHP[prevSlewL2] *= 0.5; kHP[prevSlewL1] += kHP[prevSampL1] - inputSample; kHP[prevSlewL1] *= 0.5; //make slews from each set of samples used kHP[accSlewL2] += kHP[prevSlewL3] - kHP[prevSlewL2]; kHP[accSlewL2] *= 0.5; kHP[accSlewL1] += kHP[prevSlewL2] - kHP[prevSlewL1]; kHP[accSlewL1] *= 0.5; //differences between slews: rate of change of rate of change kHP[accSlewL3] += (kHP[accSlewL2] - kHP[accSlewL1]); kHP[accSlewL3] *= 0.5; //entering the abyss, what even is this kHP[kalOutL] += kHP[prevSampL1] + kHP[prevSlewL2] + kHP[accSlewL3]; kHP[kalOutL] *= 0.5; //resynthesizing predicted result (all iir smoothed) kHP[kalGainL] += fabs(dryKal-kHP[kalOutL])*kalHP*8.0; kHP[kalGainL] *= 0.5; //madness takes its toll. Kalman Gain: how much dry to retain if (kHP[kalGainL] > kalHP*0.5) kHP[kalGainL] = kalHP*0.5; //attempts to avoid explosions kHP[kalOutL] += (dryKal*(1.0-(0.68+(kalHP*0.157)))); //this is for tuning a really complete cancellation up around Nyquist kHP[prevSampL3] = kHP[prevSampL2]; kHP[prevSampL2] = kHP[prevSampL1]; kHP[prevSampL1] = (kHP[kalGainL] * kHP[kalOutL]) + ((1.0-kHP[kalGainL])*dryKal); //feed the chain of previous samples if (kHP[prevSampL1] > 1.0) kHP[prevSampL1] = 1.0; if (kHP[prevSampL1] < -1.0) kHP[prevSampL1] = -1.0; //end Kalman Filter, except for trim on output inputSample = drySample+(kHP[kalOutL]*-0.777); //highpass //begin Kalman Filter dryKal = inputSample = inputSample*(1.0-kalLP)*0.777; inputSample *= (1.0-kalLP); //set up gain levels to control the beast kLP[prevSlewL3] += kLP[prevSampL3] - kLP[prevSampL2]; kLP[prevSlewL3] *= 0.5; kLP[prevSlewL2] += kLP[prevSampL2] - kLP[prevSampL1]; kLP[prevSlewL2] *= 0.5; kLP[prevSlewL1] += kLP[prevSampL1] - inputSample; kLP[prevSlewL1] *= 0.5; //make slews from each set of samples used kLP[accSlewL2] += kLP[prevSlewL3] - kLP[prevSlewL2]; kLP[accSlewL2] *= 0.5; kLP[accSlewL1] += kLP[prevSlewL2] - kLP[prevSlewL1]; kLP[accSlewL1] *= 0.5; //differences between slews: rate of change of rate of change kLP[accSlewL3] += (kLP[accSlewL2] - kLP[accSlewL1]); kLP[accSlewL3] *= 0.5; //entering the abyss, what even is this kLP[kalOutL] += kLP[prevSampL1] + kLP[prevSlewL2] + kLP[accSlewL3]; kLP[kalOutL] *= 0.5; //resynthesizing predicted result (all iir smoothed) kLP[kalGainL] += fabs(dryKal-kLP[kalOutL])*kalLP*8.0; kLP[kalGainL] *= 0.5; //madness takes its toll. Kalman Gain: how much dry to retain if (kLP[kalGainL] > kalLP*0.5) kLP[kalGainL] = kalLP*0.5; //attempts to avoid explosions kLP[kalOutL] += (dryKal*(1.0-(0.68+(kalLP*0.157)))); //this is for tuning a really complete cancellation up around Nyquist kLP[prevSampL3] = kLP[prevSampL2]; kLP[prevSampL2] = kLP[prevSampL1]; kLP[prevSampL1] = (kLP[kalGainL] * kLP[kalOutL]) + ((1.0-kLP[kalGainL])*dryKal); //feed the chain of previous samples if (kLP[prevSampL1] > 1.0) kLP[prevSampL1] = 1.0; if (kLP[prevSampL1] < -1.0) kLP[prevSampL1] = -1.0; //end Kalman Filter, except for trim on output inputSample = sin(kLP[kalOutL]*0.7943)*1.2589; //lowpass //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; } }