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441 lines
19 KiB
C++
441 lines
19 KiB
C++
/*
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* File: Isolator2.cpp
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*
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* Version: 1.0
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*
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* Created: 2/21/22
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*
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* Copyright: Copyright © 2022 Airwindows, Airwindows uses the MIT license
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*
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* Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in
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* consideration of your agreement to the following terms, and your use, installation, modification
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* or redistribution of this Apple software constitutes acceptance of these terms. If you do
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* not agree with these terms, please do not use, install, modify or redistribute this Apple
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* software.
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*
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* In consideration of your agreement to abide by the following terms, and subject to these terms,
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* Apple grants you a personal, non-exclusive license, under Apple's copyrights in this
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* original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the
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* Apple Software, with or without modifications, in source and/or binary forms; provided that if you
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* redistribute the Apple Software in its entirety and without modifications, you must retain this
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* notice and the following text and disclaimers in all such redistributions of the Apple Software.
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* Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to
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* endorse or promote products derived from the Apple Software without specific prior written
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* permission from Apple. Except as expressly stated in this notice, no other rights or
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* licenses, express or implied, are granted by Apple herein, including but not limited to any
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* patent rights that may be infringed by your derivative works or by other works in which the
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* Apple Software may be incorporated.
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*
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* The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR
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* IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE
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* OR IN COMBINATION WITH YOUR PRODUCTS.
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*
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* IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
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* REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER
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* UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN
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* IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*=============================================================================
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Isolator2.cpp
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=============================================================================*/
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#include "Isolator2.h"
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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COMPONENT_ENTRY(Isolator2)
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Isolator2::Isolator2
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Isolator2::Isolator2(AudioUnit component)
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: AUEffectBase(component)
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{
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CreateElements();
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Globals()->UseIndexedParameters(kNumberOfParameters);
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SetParameter(kParam_One, kDefaultValue_ParamOne );
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SetParameter(kParam_Two, kDefaultValue_ParamTwo );
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SetParameter(kParam_Three, kDefaultValue_ParamThree );
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SetParameter(kParam_Four, kDefaultValue_ParamFour );
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#if AU_DEBUG_DISPATCHER
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mDebugDispatcher = new AUDebugDispatcher (this);
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#endif
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Isolator2::GetParameterValueStrings
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Isolator2::GetParameterValueStrings(AudioUnitScope inScope,
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AudioUnitParameterID inParameterID,
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CFArrayRef * outStrings)
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{
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return kAudioUnitErr_InvalidProperty;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Isolator2::GetParameterInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Isolator2::GetParameterInfo(AudioUnitScope inScope,
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AudioUnitParameterID inParameterID,
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AudioUnitParameterInfo &outParameterInfo )
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{
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ComponentResult result = noErr;
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outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
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| kAudioUnitParameterFlag_IsReadable;
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if (inScope == kAudioUnitScope_Global) {
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switch(inParameterID)
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{
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case kParam_One:
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AUBase::FillInParameterName (outParameterInfo, kParameterOneName, false);
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outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
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outParameterInfo.minValue = 0.0;
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outParameterInfo.maxValue = 1.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamOne;
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break;
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case kParam_Two:
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AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false);
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outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
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outParameterInfo.minValue = 0.0;
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outParameterInfo.maxValue = 1.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
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break;
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case kParam_Three:
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AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false);
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outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
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outParameterInfo.minValue = 0.0;
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outParameterInfo.maxValue = 1.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamThree;
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break;
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case kParam_Four:
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AUBase::FillInParameterName (outParameterInfo, kParameterFourName, false);
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outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
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outParameterInfo.minValue = 0.0;
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outParameterInfo.maxValue = 1.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamFour;
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break;
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default:
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result = kAudioUnitErr_InvalidParameter;
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break;
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}
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} else {
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result = kAudioUnitErr_InvalidParameter;
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}
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return result;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Isolator2::GetPropertyInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Isolator2::GetPropertyInfo (AudioUnitPropertyID inID,
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AudioUnitScope inScope,
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AudioUnitElement inElement,
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UInt32 & outDataSize,
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Boolean & outWritable)
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{
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return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Isolator2::GetProperty
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Isolator2::GetProperty( AudioUnitPropertyID inID,
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AudioUnitScope inScope,
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AudioUnitElement inElement,
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void * outData )
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{
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return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
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}
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// Isolator2::Initialize
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Isolator2::Initialize()
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{
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ComponentResult result = AUEffectBase::Initialize();
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if (result == noErr)
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Reset(kAudioUnitScope_Global, 0);
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return result;
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}
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#pragma mark ____Isolator2EffectKernel
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Isolator2::Isolator2Kernel::Reset()
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void Isolator2::Isolator2Kernel::Reset()
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{
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for (int x = 0; x < biq_total; x++) {
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biquadA[x] = 0.0;
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biquadB[x] = 0.0;
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biquadC[x] = 0.0;
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biquadD[x] = 0.0;
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biquadE[x] = 0.0;
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biquadF[x] = 0.0;
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biquadG[x] = 0.0;
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}
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highA = 0.0; highB = 0.0;
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lowA = 1.0; lowB = 1.0;
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fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Isolator2::Isolator2Kernel::Process
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void Isolator2::Isolator2Kernel::Process( const Float32 *inSourceP,
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Float32 *inDestP,
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UInt32 inFramesToProcess,
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UInt32 inNumChannels,
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bool &ioSilence )
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{
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UInt32 nSampleFrames = inFramesToProcess;
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const Float32 *sourceP = inSourceP;
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Float32 *destP = inDestP;
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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= GetSampleRate();
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biquadA[biq_freq] = pow(GetParameter( kParam_One ),(2.0*sqrt(overallscale)))*0.4999;
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if (biquadA[biq_freq] < 0.0005) biquadA[biq_freq] = 0.0005;
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biquadG[biq_freq] = biquadF[biq_freq] = biquadE[biq_freq] = biquadD[biq_freq] = biquadC[biq_freq] = biquadB[biq_freq] = biquadA[biq_freq];
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double reso = pow(GetParameter( kParam_Two ),2);
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double resoBoost = reso+1.0;
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reso = 1.0-reso;
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biquadA[biq_reso] = 4.46570214 * resoBoost;
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biquadB[biq_reso] = 1.51387132 * resoBoost;
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biquadC[biq_reso] = 0.93979296 * resoBoost;
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biquadD[biq_reso] = 0.70710678 * resoBoost;
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biquadE[biq_reso] = 0.59051105 * resoBoost;
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biquadF[biq_reso] = 0.52972649 * resoBoost;
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biquadG[biq_reso] = 0.50316379 * resoBoost;
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biquadA[biq_aA0] = biquadA[biq_aB0];
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biquadA[biq_aA1] = biquadA[biq_aB1];
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biquadA[biq_aA2] = biquadA[biq_aB2];
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biquadA[biq_bA1] = biquadA[biq_bB1];
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biquadA[biq_bA2] = biquadA[biq_bB2];
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biquadB[biq_aA0] = biquadB[biq_aB0];
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biquadB[biq_aA1] = biquadB[biq_aB1];
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biquadB[biq_aA2] = biquadB[biq_aB2];
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biquadB[biq_bA1] = biquadB[biq_bB1];
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biquadB[biq_bA2] = biquadB[biq_bB2];
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biquadC[biq_aA0] = biquadC[biq_aB0];
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biquadC[biq_aA1] = biquadC[biq_aB1];
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biquadC[biq_aA2] = biquadC[biq_aB2];
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biquadC[biq_bA1] = biquadC[biq_bB1];
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biquadC[biq_bA2] = biquadC[biq_bB2];
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biquadD[biq_aA0] = biquadD[biq_aB0];
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biquadD[biq_aA1] = biquadD[biq_aB1];
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biquadD[biq_aA2] = biquadD[biq_aB2];
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biquadD[biq_bA1] = biquadD[biq_bB1];
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biquadD[biq_bA2] = biquadD[biq_bB2];
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biquadE[biq_aA0] = biquadE[biq_aB0];
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biquadE[biq_aA1] = biquadE[biq_aB1];
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biquadE[biq_aA2] = biquadE[biq_aB2];
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biquadE[biq_bA1] = biquadE[biq_bB1];
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biquadE[biq_bA2] = biquadE[biq_bB2];
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biquadF[biq_aA0] = biquadF[biq_aB0];
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biquadF[biq_aA1] = biquadF[biq_aB1];
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biquadF[biq_aA2] = biquadF[biq_aB2];
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biquadF[biq_bA1] = biquadF[biq_bB1];
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biquadF[biq_bA2] = biquadF[biq_bB2];
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biquadG[biq_aA0] = biquadG[biq_aB0];
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biquadG[biq_aA1] = biquadG[biq_aB1];
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biquadG[biq_aA2] = biquadG[biq_aB2];
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biquadG[biq_bA1] = biquadG[biq_bB1];
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biquadG[biq_bA2] = biquadG[biq_bB2];
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//previous run through the buffer is still in the filter, so we move it
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//to the A section and now it's the new starting point.
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double K = tan(M_PI * biquadA[biq_freq]);
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double norm = 1.0 / (1.0 + K / biquadA[biq_reso] + K * K);
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biquadA[biq_aB0] = K * K * norm;
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biquadA[biq_aB1] = 2.0 * biquadA[biq_aB0];
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biquadA[biq_aB2] = biquadA[biq_aB0];
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biquadA[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
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biquadA[biq_bB2] = (1.0 - K / biquadA[biq_reso] + K * K) * norm;
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K = tan(M_PI * biquadB[biq_freq]);
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norm = 1.0 / (1.0 + K / biquadB[biq_reso] + K * K);
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biquadB[biq_aB0] = K * K * norm;
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biquadB[biq_aB1] = 2.0 * biquadB[biq_aB0];
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biquadB[biq_aB2] = biquadB[biq_aB0];
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biquadB[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
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biquadB[biq_bB2] = (1.0 - K / biquadB[biq_reso] + K * K) * norm;
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K = tan(M_PI * biquadC[biq_freq]);
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norm = 1.0 / (1.0 + K / biquadC[biq_reso] + K * K);
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biquadC[biq_aB0] = K * K * norm;
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biquadC[biq_aB1] = 2.0 * biquadC[biq_aB0];
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biquadC[biq_aB2] = biquadC[biq_aB0];
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biquadC[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
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biquadC[biq_bB2] = (1.0 - K / biquadC[biq_reso] + K * K) * norm;
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K = tan(M_PI * biquadD[biq_freq]);
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norm = 1.0 / (1.0 + K / biquadD[biq_reso] + K * K);
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biquadD[biq_aB0] = K * K * norm;
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biquadD[biq_aB1] = 2.0 * biquadD[biq_aB0];
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biquadD[biq_aB2] = biquadD[biq_aB0];
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biquadD[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
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biquadD[biq_bB2] = (1.0 - K / biquadD[biq_reso] + K * K) * norm;
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K = tan(M_PI * biquadE[biq_freq]);
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norm = 1.0 / (1.0 + K / biquadE[biq_reso] + K * K);
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biquadE[biq_aB0] = K * K * norm;
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biquadE[biq_aB1] = 2.0 * biquadE[biq_aB0];
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biquadE[biq_aB2] = biquadE[biq_aB0];
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biquadE[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
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biquadE[biq_bB2] = (1.0 - K / biquadE[biq_reso] + K * K) * norm;
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K = tan(M_PI * biquadF[biq_freq]);
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norm = 1.0 / (1.0 + K / biquadF[biq_reso] + K * K);
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biquadF[biq_aB0] = K * K * norm;
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biquadF[biq_aB1] = 2.0 * biquadF[biq_aB0];
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biquadF[biq_aB2] = biquadF[biq_aB0];
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biquadF[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
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biquadF[biq_bB2] = (1.0 - K / biquadF[biq_reso] + K * K) * norm;
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K = tan(M_PI * biquadG[biq_freq]);
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norm = 1.0 / (1.0 + K / biquadG[biq_reso] + K * K);
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biquadG[biq_aB0] = K * K * norm;
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biquadG[biq_aB1] = 2.0 * biquadG[biq_aB0];
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biquadG[biq_aB2] = biquadG[biq_aB0];
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biquadG[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
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biquadG[biq_bB2] = (1.0 - K / biquadG[biq_reso] + K * K) * norm;
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bool bypass = (GetParameter( kParam_One ) == 1.0);
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highA = highB;
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highB = GetParameter( kParam_Three )*reso;
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if (highB > 0.0) bypass = false;
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lowA = lowB;
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lowB = GetParameter( kParam_Four )*reso;
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if (lowB < 1.0) bypass = false;
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while (nSampleFrames-- > 0) {
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double inputSample = *sourceP;
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if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17;
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double drySample = inputSample;
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double temp = (double)nSampleFrames/inFramesToProcess;
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biquadA[biq_a0] = (biquadA[biq_aA0]*temp)+(biquadA[biq_aB0]*(1.0-temp));
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biquadA[biq_a1] = (biquadA[biq_aA1]*temp)+(biquadA[biq_aB1]*(1.0-temp));
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biquadA[biq_a2] = (biquadA[biq_aA2]*temp)+(biquadA[biq_aB2]*(1.0-temp));
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biquadA[biq_b1] = (biquadA[biq_bA1]*temp)+(biquadA[biq_bB1]*(1.0-temp));
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biquadA[biq_b2] = (biquadA[biq_bA2]*temp)+(biquadA[biq_bB2]*(1.0-temp));
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biquadB[biq_a0] = (biquadB[biq_aA0]*temp)+(biquadB[biq_aB0]*(1.0-temp));
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biquadB[biq_a1] = (biquadB[biq_aA1]*temp)+(biquadB[biq_aB1]*(1.0-temp));
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biquadB[biq_a2] = (biquadB[biq_aA2]*temp)+(biquadB[biq_aB2]*(1.0-temp));
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biquadB[biq_b1] = (biquadB[biq_bA1]*temp)+(biquadB[biq_bB1]*(1.0-temp));
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biquadB[biq_b2] = (biquadB[biq_bA2]*temp)+(biquadB[biq_bB2]*(1.0-temp));
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biquadC[biq_a0] = (biquadC[biq_aA0]*temp)+(biquadC[biq_aB0]*(1.0-temp));
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biquadC[biq_a1] = (biquadC[biq_aA1]*temp)+(biquadC[biq_aB1]*(1.0-temp));
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biquadC[biq_a2] = (biquadC[biq_aA2]*temp)+(biquadC[biq_aB2]*(1.0-temp));
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biquadC[biq_b1] = (biquadC[biq_bA1]*temp)+(biquadC[biq_bB1]*(1.0-temp));
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biquadC[biq_b2] = (biquadC[biq_bA2]*temp)+(biquadC[biq_bB2]*(1.0-temp));
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biquadD[biq_a0] = (biquadD[biq_aA0]*temp)+(biquadD[biq_aB0]*(1.0-temp));
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biquadD[biq_a1] = (biquadD[biq_aA1]*temp)+(biquadD[biq_aB1]*(1.0-temp));
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biquadD[biq_a2] = (biquadD[biq_aA2]*temp)+(biquadD[biq_aB2]*(1.0-temp));
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biquadD[biq_b1] = (biquadD[biq_bA1]*temp)+(biquadD[biq_bB1]*(1.0-temp));
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biquadD[biq_b2] = (biquadD[biq_bA2]*temp)+(biquadD[biq_bB2]*(1.0-temp));
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biquadE[biq_a0] = (biquadE[biq_aA0]*temp)+(biquadE[biq_aB0]*(1.0-temp));
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biquadE[biq_a1] = (biquadE[biq_aA1]*temp)+(biquadE[biq_aB1]*(1.0-temp));
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biquadE[biq_a2] = (biquadE[biq_aA2]*temp)+(biquadE[biq_aB2]*(1.0-temp));
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biquadE[biq_b1] = (biquadE[biq_bA1]*temp)+(biquadE[biq_bB1]*(1.0-temp));
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biquadE[biq_b2] = (biquadE[biq_bA2]*temp)+(biquadE[biq_bB2]*(1.0-temp));
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biquadF[biq_a0] = (biquadF[biq_aA0]*temp)+(biquadF[biq_aB0]*(1.0-temp));
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biquadF[biq_a1] = (biquadF[biq_aA1]*temp)+(biquadF[biq_aB1]*(1.0-temp));
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biquadF[biq_a2] = (biquadF[biq_aA2]*temp)+(biquadF[biq_aB2]*(1.0-temp));
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biquadF[biq_b1] = (biquadF[biq_bA1]*temp)+(biquadF[biq_bB1]*(1.0-temp));
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biquadF[biq_b2] = (biquadF[biq_bA2]*temp)+(biquadF[biq_bB2]*(1.0-temp));
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biquadG[biq_a0] = (biquadG[biq_aA0]*temp)+(biquadG[biq_aB0]*(1.0-temp));
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biquadG[biq_a1] = (biquadG[biq_aA1]*temp)+(biquadG[biq_aB1]*(1.0-temp));
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biquadG[biq_a2] = (biquadG[biq_aA2]*temp)+(biquadG[biq_aB2]*(1.0-temp));
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biquadG[biq_b1] = (biquadG[biq_bA1]*temp)+(biquadG[biq_bB1]*(1.0-temp));
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biquadG[biq_b2] = (biquadG[biq_bA2]*temp)+(biquadG[biq_bB2]*(1.0-temp));
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//this is the interpolation code for the biquad
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double high = (highA*temp)+(highB*(1.0-temp));
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double low = (lowA*temp)+(lowB*(1.0-temp));
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double outSample = (inputSample * biquadA[biq_a0]) + biquadA[biq_sL1];
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biquadA[biq_sL1] = (inputSample * biquadA[biq_a1]) - (outSample * biquadA[biq_b1]) + biquadA[biq_sL2];
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biquadA[biq_sL2] = (inputSample * biquadA[biq_a2]) - (outSample * biquadA[biq_b2]);
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inputSample = outSample;
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outSample = (inputSample * biquadB[biq_a0]) + biquadB[biq_sL1];
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biquadB[biq_sL1] = (inputSample * biquadB[biq_a1]) - (outSample * biquadB[biq_b1]) + biquadB[biq_sL2];
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biquadB[biq_sL2] = (inputSample * biquadB[biq_a2]) - (outSample * biquadB[biq_b2]);
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inputSample = outSample;
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outSample = (inputSample * biquadC[biq_a0]) + biquadC[biq_sL1];
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biquadC[biq_sL1] = (inputSample * biquadC[biq_a1]) - (outSample * biquadC[biq_b1]) + biquadC[biq_sL2];
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biquadC[biq_sL2] = (inputSample * biquadC[biq_a2]) - (outSample * biquadC[biq_b2]);
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inputSample = outSample;
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outSample = (inputSample * biquadD[biq_a0]) + biquadD[biq_sL1];
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biquadD[biq_sL1] = (inputSample * biquadD[biq_a1]) - (outSample * biquadD[biq_b1]) + biquadD[biq_sL2];
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biquadD[biq_sL2] = (inputSample * biquadD[biq_a2]) - (outSample * biquadD[biq_b2]);
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inputSample = outSample;
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outSample = (inputSample * biquadE[biq_a0]) + biquadE[biq_sL1];
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biquadE[biq_sL1] = (inputSample * biquadE[biq_a1]) - (outSample * biquadE[biq_b1]) + biquadE[biq_sL2];
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biquadE[biq_sL2] = (inputSample * biquadE[biq_a2]) - (outSample * biquadE[biq_b2]);
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inputSample = outSample;
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outSample = (inputSample * biquadF[biq_a0]) + biquadF[biq_sL1];
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biquadF[biq_sL1] = (inputSample * biquadF[biq_a1]) - (outSample * biquadF[biq_b1]) + biquadF[biq_sL2];
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biquadF[biq_sL2] = (inputSample * biquadF[biq_a2]) - (outSample * biquadF[biq_b2]);
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inputSample = outSample;
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outSample = (inputSample * biquadG[biq_a0]) + biquadG[biq_sL1];
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biquadG[biq_sL1] = (inputSample * biquadG[biq_a1]) - (outSample * biquadG[biq_b1]) + biquadG[biq_sL2];
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biquadG[biq_sL2] = (inputSample * biquadG[biq_a2]) - (outSample * biquadG[biq_b2]);
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inputSample = outSample;
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if (bypass) inputSample = drySample;
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else inputSample = (inputSample * low) + ((drySample - inputSample)*high);
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//begin 32 bit floating point dither
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int expon; frexpf((float)inputSample, &expon);
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fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
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inputSample += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 32 bit floating point dither
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*destP = inputSample;
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sourceP += inNumChannels; destP += inNumChannels;
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}
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}
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