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Diffstat (limited to 'plugins/MacAU/BiquadOneHalf/BiquadOneHalf.cpp')
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1 files changed, 405 insertions, 0 deletions
diff --git a/plugins/MacAU/BiquadOneHalf/BiquadOneHalf.cpp b/plugins/MacAU/BiquadOneHalf/BiquadOneHalf.cpp new file mode 100755 index 0000000..b31fe92 --- /dev/null +++ b/plugins/MacAU/BiquadOneHalf/BiquadOneHalf.cpp @@ -0,0 +1,405 @@ +/* +* File: BiquadOneHalf.cpp +* +* Version: 1.0 +* +* Created: 12/20/19 +* +* Copyright: Copyright © 2019 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. If you do +* not agree with these terms, please do not use, install, modify or redistribute this Apple +* software. +* +* In consideration of your agreement to abide by the following terms, and subject to these terms, +* Apple grants you a personal, non-exclusive license, under Apple's copyrights in this +* original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the +* Apple Software, with or without modifications, in source and/or binary forms; provided that if you +* redistribute the Apple Software in its entirety and without modifications, you must retain this +* notice and the following text and disclaimers in all such redistributions of the Apple Software. +* Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to +* endorse or promote products derived from the Apple Software without specific prior written +* permission from Apple. Except as expressly stated in this notice, no other rights or +* licenses, express or implied, are granted by Apple herein, including but not limited to any +* patent rights that may be infringed by your derivative works or by other works in which the +* Apple Software may be incorporated. +* +* The Apple Software is provided by Apple on an "AS IS" basis. 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. +* +*/ +/*============================================================================= + BiquadOneHalf.cpp + +=============================================================================*/ +#include "BiquadOneHalf.h" + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +COMPONENT_ENTRY(BiquadOneHalf) + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadOneHalf::BiquadOneHalf +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +BiquadOneHalf::BiquadOneHalf(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 + +} + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadOneHalf::GetParameterValueStrings +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult BiquadOneHalf::GetParameterValueStrings(AudioUnitScope inScope, + AudioUnitParameterID inParameterID, + CFArrayRef * outStrings) +{ + + return kAudioUnitErr_InvalidProperty; +} + + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadOneHalf::GetParameterInfo +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult BiquadOneHalf::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_Indexed; + 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.flags |= kAudioUnitParameterFlag_DisplayLogarithmic; + outParameterInfo.minValue = 0.0001; + outParameterInfo.maxValue = 1.0; + outParameterInfo.defaultValue = kDefaultValue_ParamTwo; + break; + case kParam_Three: + AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false); + outParameterInfo.unit = kAudioUnitParameterUnit_Generic; + outParameterInfo.flags |= kAudioUnitParameterFlag_DisplayLogarithmic; + outParameterInfo.minValue = 0.01; + outParameterInfo.maxValue = 30.0; + outParameterInfo.defaultValue = kDefaultValue_ParamThree; + break; + case kParam_Four: + AUBase::FillInParameterName (outParameterInfo, kParameterFourName, false); + outParameterInfo.unit = kAudioUnitParameterUnit_Generic; + outParameterInfo.minValue = -1.0; + outParameterInfo.maxValue = 1.0; + outParameterInfo.defaultValue = kDefaultValue_ParamFour; + break; + default: + result = kAudioUnitErr_InvalidParameter; + break; + } + } else { + result = kAudioUnitErr_InvalidParameter; + } + + + + return result; +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadOneHalf::GetPropertyInfo +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult BiquadOneHalf::GetPropertyInfo (AudioUnitPropertyID inID, + AudioUnitScope inScope, + AudioUnitElement inElement, + UInt32 & outDataSize, + Boolean & outWritable) +{ + return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadOneHalf::GetProperty +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult BiquadOneHalf::GetProperty( AudioUnitPropertyID inID, + AudioUnitScope inScope, + AudioUnitElement inElement, + void * outData ) +{ + return AUEffectBase::GetProperty (inID, inScope, inElement, outData); +} + +// BiquadOneHalf::Initialize +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +ComponentResult BiquadOneHalf::Initialize() +{ + ComponentResult result = AUEffectBase::Initialize(); + if (result == noErr) + Reset(kAudioUnitScope_Global, 0); + return result; +} + +#pragma mark ____BiquadOneHalfEffectKernel + + + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadOneHalf::BiquadOneHalfKernel::Reset() +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +void BiquadOneHalf::BiquadOneHalfKernel::Reset() +{ + for (int x = 0; x < 9; x++) {biquadA[x] = 0.0;biquadB[x] = 0.0;} + flip = false; + fpd = 17; +} + +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// BiquadOneHalf::BiquadOneHalfKernel::Process +//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +void BiquadOneHalf::BiquadOneHalfKernel::Process( const Float32 *inSourceP, + Float32 *inDestP, + UInt32 inFramesToProcess, + UInt32 inNumChannels, + bool &ioSilence ) +{ + UInt32 nSampleFrames = inFramesToProcess; + const Float32 *sourceP = inSourceP; + Float32 *destP = inDestP; + long double overallscale = 1.0; + overallscale /= 44100.0; + overallscale *= GetSampleRate(); + + int type = GetParameter( kParam_One); + + //originalbiquad[0] = 600.0/GetSampleRate(); //fixed frequency, 600hz + //interleavedbiquad[0] = 1200.0/GetSampleRate(); //fixed frequency, 600hz + //using the interleaved biquad you have to specify double the frequency you otherwise would, + //and it still must remain less than 0.5 in total + + + biquadA[0] = GetParameter( kParam_Two )*0.499; + if (biquadA[0] < 0.0001) biquadA[0] = 0.0001; + + biquadA[1] = GetParameter( kParam_Three ); + if (biquadA[1] < 0.0001) biquadA[1] = 0.0001; + + Float64 wet = GetParameter( kParam_Four ); + + //biquad contains these values: + //[0] is frequency: 0.000001 to 0.499999 is near-zero to near-Nyquist + //[1] is resonance, 0.7071 is Butterworth. Also can't be zero + //[2] is a0 but you need distinct ones for additional biquad instances so it's here + //[3] is a1 but you need distinct ones for additional biquad instances so it's here + //[4] is a2 but you need distinct ones for additional biquad instances so it's here + //[5] is b1 but you need distinct ones for additional biquad instances so it's here + //[6] is b2 but you need distinct ones for additional biquad instances so it's here + //[7] is a stored delayed sample (freq and res are stored so you can move them sample by sample) + //[8] is a stored delayed sample (you have to include the coefficient making code if you do that) + + //to build a dedicated filter, rename 'biquad' to whatever the new filter is, then + //put this code either within the sample buffer (for smoothly modulating freq or res) + //or in this 'read the controls' area (for letting you change freq and res with controls) + //or in 'reset' if the freq and res are absolutely fixed (use GetSampleRate to define freq) + + if (type == 1) { //lowpass + double K = tan(M_PI * biquadA[0]); + double norm = 1.0 / (1.0 + K / biquadA[1] + K * K); + biquadA[2] = K * K * norm; + biquadA[3] = 2.0 * biquadA[2]; + biquadA[4] = biquadA[2]; + biquadA[5] = 2.0 * (K * K - 1.0) * norm; + biquadA[6] = (1.0 - K / biquadA[1] + K * K) * norm; + } + + if (type == 2) { //highpass + double K = tan(M_PI * biquadA[0]); + double norm = 1.0 / (1.0 + K / biquadA[1] + K * K); + biquadA[2] = norm; + biquadA[3] = -2.0 * biquadA[2]; + biquadA[4] = biquadA[2]; + biquadA[5] = 2.0 * (K * K - 1.0) * norm; + biquadA[6] = (1.0 - K / biquadA[1] + K * K) * norm; + } + + if (type == 3) { //bandpass + double K = tan(M_PI * biquadA[0]); + double norm = 1.0 / (1.0 + K / biquadA[1] + K * K); + biquadA[2] = K / biquadA[1] * norm; + biquadA[3] = 0.0; //bandpass can simplify the biquad kernel: leave out this multiply + biquadA[4] = -biquadA[2]; + biquadA[5] = 2.0 * (K * K - 1.0) * norm; + biquadA[6] = (1.0 - K / biquadA[1] + K * K) * norm; + } + + if (type == 4) { //notch + double K = tan(M_PI * biquadA[0]); + double norm = 1.0 / (1.0 + K / biquadA[1] + K * K); + biquadA[2] = (1.0 + K * K) * norm; + biquadA[3] = 2.0 * (K * K - 1) * norm; + biquadA[4] = biquadA[2]; + biquadA[5] = biquadA[3]; + biquadA[6] = (1.0 - K / biquadA[1] + K * K) * norm; + } + for (int x = 0; x < 9; x++) {biquadB[x] = biquadA[x];} + + while (nSampleFrames-- > 0) { + long double inputSample = *sourceP; + if (fabs(inputSample)<1.18e-37) inputSample = fpd * 1.18e-37; + long double drySample = *sourceP; + + + inputSample = sin(inputSample); + //encode Console5: good cleanness + + long double tempSample; + if (flip) + { + tempSample = (inputSample * biquadA[2]) + biquadA[7]; + biquadA[7] = (inputSample * biquadA[3]) - (tempSample * biquadA[5]) + biquadA[8]; + biquadA[8] = (inputSample * biquadA[4]) - (tempSample * biquadA[6]); + inputSample = tempSample; //interleaved biquad + } + else + { + tempSample = (inputSample * biquadB[2]) + biquadB[7]; + biquadB[7] = (inputSample * biquadB[3]) - (tempSample * biquadB[5]) + biquadB[8]; + biquadB[8] = (inputSample * biquadB[4]) - (tempSample * biquadB[6]); + inputSample = tempSample; //interleaved biquad + } + flip = !flip; + + + if (inputSample > 1.0) inputSample = 1.0; + if (inputSample < -1.0) inputSample = -1.0; + //without this, you can get a NaN condition where it spits out DC offset at full blast! + inputSample = asin(inputSample); + //amplitude aspect + + if (wet < 1.0) { + inputSample = (inputSample*wet) + (drySample*(1.0-fabs(wet))); + //inv/dry/wet lets us turn LP into HP and band into notch + } + + //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; + } +} + +/* + if (type == 5) { //peak, but I prefer to assemble this from bandpass/notch + double biquad[0] = freq; // 0.000001 to 0.499999 is near-zero to near-Nyquist + double biquad[1] = reso; // 0.000001 to >10 is resonance, 0.7071 is Butterworth + double peakGain = boost; //negative or positive gain, in dB + if (peakGain >= 0) { // boost + double V = pow(10, fabs(peakGain) / 20.0); + double K = tan(M_PI * biquad[0]); + double norm = 1 / (1 + 1/biquad[1] * K + K * K); + biquad[2] = (1 + V/biquad[1] * K + K * K) * norm; + biquad[3] = 2 * (K * K - 1) * norm; + biquad[4] = (1 - V/biquad[1] * K + K * K) * norm; + biquad[5] = biquad[3]; + biquad[6] = (1 - 1/biquad[1] * K + K * K) * norm; + } else {// cut + double V = pow(10, fabs(peakGain) / 20.0); + double K = tan(M_PI * biquad[0]); + double norm = 1 / (1 + V/biquad[1] * K + K * K); + biquad[2] = (1 + 1/biquad[1] * K + K * K) * norm; + biquad[3] = 2 * (K * K - 1) * norm; + biquad[4] = (1 - 1/biquad[1] * K + K * K) * norm; + biquad[5] = biquad[3]; + biquad[6] = (1 - V/biquad[1] * K + K * K) * norm; + } + } + + if (type == 6) { //lowshelf, but I prefer to assemble this from raw lowpass/highpass + double biquad[0] = freq; // 0.000001 to 0.499999 is near-zero to near-Nyquist + double peakGain = 0.0; //negative or positive gain, in dB + if (peakGain >= 0) { // boost + double V = pow(10, fabs(peakGain) / 20.0); + double K = tan(M_PI * biquad[0]); + double norm = 1 / (1 + sqrt(2) * K + K * K); + biquad[2] = (1 + sqrt(2*V) * K + V * K * K) * norm; + biquad[3] = 2 * (V * K * K - 1) * norm; + biquad[4] = (1 - sqrt(2*V) * K + V * K * K) * norm; + biquad[5] = 2 * (K * K - 1) * norm; + biquad[6] = (1 - sqrt(2) * K + K * K) * norm; + } else { // cut + double V = pow(10, fabs(peakGain) / 20.0); + double K = tan(M_PI * biquad[0]); + double norm = 1 / (1 + sqrt(2*V) * K + V * K * K); + biquad[2] = (1 + sqrt(2) * K + K * K) * norm; + biquad[3] = 2 * (K * K - 1) * norm; + biquad[4] = (1 - sqrt(2) * K + K * K) * norm; + biquad[5] = 2 * (V * K * K - 1) * norm; + biquad[6] = (1 - sqrt(2*V) * K + V * K * K) * norm; + } + } + + if (type == 7) { //highshelf, but I prefer to assemble this from raw lowpass/highpass + double biquad[0] = freq; // 0.000001 to 0.499999 is near-zero to near-Nyquist + double peakGain = 0.0; //negative or positive gain, in dB + if (peakGain >= 0) { // boost + double V = pow(10, fabs(peakGain) / 20.0); + double K = tan(M_PI * biquad[0]); + double norm = 1 / (1 + sqrt(2) * K + K * K); + biquad[2] = (V + sqrt(2*V) * K + K * K) * norm; + biquad[3] = 2 * (K * K - V) * norm; + biquad[4] = (V - sqrt(2*V) * K + K * K) * norm; + biquad[5] = 2 * (K * K - 1) * norm; + biquad[6] = (1 - sqrt(2) * K + K * K) * norm; + } else { // cut + double V = pow(10, fabs(peakGain) / 20.0); + double K = tan(M_PI * biquad[0]); + double norm = 1 / (V + sqrt(2*V) * K + K * K); + biquad[2] = (1 + sqrt(2) * K + K * K) * norm; + biquad[3] = 2 * (K * K - 1) * norm; + biquad[4] = (1 - sqrt(2) * K + K * K) * norm; + biquad[5] = 2 * (K * K - V) * norm; + biquad[6] = (V - sqrt(2*V) * K + K * K) * norm; + } + } + */ + |