/* * File: YNotNotch.cpp * * Version: 1.0 * * Created: 9/21/23 * * Copyright: Copyright © 2023 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. * */ /*============================================================================= YNotNotch.cpp =============================================================================*/ #include "YNotNotch.h" //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ COMPONENT_ENTRY(YNotNotch) //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // YNotNotch::YNotNotch //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ YNotNotch::YNotNotch(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 ); SetParameter(kParam_Six, kDefaultValue_ParamSix ); #if AU_DEBUG_DISPATCHER mDebugDispatcher = new AUDebugDispatcher (this); #endif } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // YNotNotch::GetParameterValueStrings //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult YNotNotch::GetParameterValueStrings(AudioUnitScope inScope, AudioUnitParameterID inParameterID, CFArrayRef * outStrings) { return kAudioUnitErr_InvalidProperty; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // YNotNotch::GetParameterInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult YNotNotch::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; case kParam_Six: AUBase::FillInParameterName (outParameterInfo, kParameterSixName, false); outParameterInfo.unit = kAudioUnitParameterUnit_Generic; outParameterInfo.minValue = 0.0; outParameterInfo.maxValue = 1.0; outParameterInfo.defaultValue = kDefaultValue_ParamSix; break; default: result = kAudioUnitErr_InvalidParameter; break; } } else { result = kAudioUnitErr_InvalidParameter; } return result; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // YNotNotch::GetPropertyInfo //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult YNotNotch::GetPropertyInfo (AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, UInt32 & outDataSize, Boolean & outWritable) { return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // YNotNotch::GetProperty //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult YNotNotch::GetProperty( AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, void * outData ) { return AUEffectBase::GetProperty (inID, inScope, inElement, outData); } // YNotNotch::Initialize //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ComponentResult YNotNotch::Initialize() { ComponentResult result = AUEffectBase::Initialize(); if (result == noErr) Reset(kAudioUnitScope_Global, 0); return result; } #pragma mark ____YNotNotchEffectKernel //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // YNotNotch::YNotNotchKernel::Reset() //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void YNotNotch::YNotNotchKernel::Reset() { for (int x = 0; x < biq_total; x++) {biquad[x] = 0.0;} for (int x = 0; x < fix_total; x++) {fixA[x] = 0.0; fixB[x] = 0.0;} fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX; } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // YNotNotch::YNotNotchKernel::Process //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ void YNotNotch::YNotNotchKernel::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 inTrim = GetParameter( kParam_One )*10.0; biquad[biq_freq] = pow(GetParameter( kParam_Two ),3)*20000.0; if (biquad[biq_freq] < 15.0) biquad[biq_freq] = 15.0; biquad[biq_freq] /= GetSampleRate(); biquad[biq_reso] = (pow(GetParameter( kParam_Three ),2)*15.0)+0.0001; double K = tan(M_PI * biquad[biq_freq]); double norm = 1.0 / (1.0 + K / biquad[biq_reso] + K * K); biquad[biq_a0] = (1.0 + K * K) * norm; biquad[biq_a1] = 2.0 * (K * K - 1) * norm; biquad[biq_a2] = biquad[biq_a0]; biquad[biq_b1] = biquad[biq_a1]; biquad[biq_b2] = (1.0 - K / biquad[biq_reso] + K * K) * norm; //for the coefficient-interpolated biquad filter double powFactor = pow(GetParameter( kParam_Four )+0.9,4); //1.0 == target neutral double outTrim = GetParameter( kParam_Five ); double wet = GetParameter( kParam_Six ); fixA[fix_freq] = fixB[fix_freq] = 20000.0 / GetSampleRate(); fixA[fix_reso] = fixB[fix_reso] = 0.7071; //butterworth Q K = tan(M_PI * fixA[fix_freq]); norm = 1.0 / (1.0 + K / fixA[fix_reso] + K * K); fixA[fix_a0] = fixB[fix_a0] = K * K * norm; fixA[fix_a1] = fixB[fix_a1] = 2.0 * fixA[fix_a0]; fixA[fix_a2] = fixB[fix_a2] = fixA[fix_a0]; fixA[fix_b1] = fixB[fix_b1] = 2.0 * (K * K - 1.0) * norm; fixA[fix_b2] = fixB[fix_b2] = (1.0 - K / fixA[fix_reso] + K * K) * norm; //for the fixed-position biquad filter while (nSampleFrames-- > 0) { double inputSample = *sourceP; if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17; double drySample = *sourceP; inputSample *= inTrim; double temp = (inputSample * fixA[fix_a0]) + fixA[fix_sL1]; fixA[fix_sL1] = (inputSample * fixA[fix_a1]) - (temp * fixA[fix_b1]) + fixA[fix_sL2]; fixA[fix_sL2] = (inputSample * fixA[fix_a2]) - (temp * fixA[fix_b2]); inputSample = temp; //fixed biquad filtering ultrasonics //encode/decode courtesy of torridgristle under the MIT license if (inputSample > 1.0) inputSample = 1.0; else if (inputSample > 0.0) inputSample = 1.0 - pow(1.0-inputSample,powFactor); if (inputSample < -1.0) inputSample = -1.0; else if (inputSample < 0.0) inputSample = -1.0 + pow(1.0+inputSample,powFactor); temp = (inputSample * biquad[biq_a0]) + biquad[biq_sL1]; biquad[biq_sL1] = (inputSample * biquad[biq_a1]) - (temp * biquad[biq_b1]) + biquad[biq_sL2]; biquad[biq_sL2] = (inputSample * biquad[biq_a2]) - (temp * biquad[biq_b2]); inputSample = temp; //coefficient interpolating biquad filter //encode/decode courtesy of torridgristle under the MIT license if (inputSample > 1.0) inputSample = 1.0; else if (inputSample > 0.0) inputSample = 1.0 - pow(1.0-inputSample,(1.0/powFactor)); if (inputSample < -1.0) inputSample = -1.0; else if (inputSample < 0.0) inputSample = -1.0 + pow(1.0+inputSample,(1.0/powFactor)); inputSample *= outTrim; temp = (inputSample * fixB[fix_a0]) + fixB[fix_sL1]; fixB[fix_sL1] = (inputSample * fixB[fix_a1]) - (temp * fixB[fix_b1]) + fixB[fix_sL2]; fixB[fix_sL2] = (inputSample * fixB[fix_a2]) - (temp * fixB[fix_b2]); inputSample = temp; //fixed biquad filtering ultrasonics if (wet < 1.0) { inputSample = (inputSample*wet) + (drySample*(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; } }