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357 lines
14 KiB
C++
Executable file
357 lines
14 KiB
C++
Executable file
/*
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* File: Tape.cpp
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*
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* Version: 1.0
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*
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* Created: 1/21/20
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*
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* Copyright: Copyright © 2020 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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Tape.cpp
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=============================================================================*/
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#include "Tape.h"
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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COMPONENT_ENTRY(Tape)
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Tape::Tape
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Tape::Tape(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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#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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// Tape::GetParameterValueStrings
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Tape::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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// Tape::GetParameterInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Tape::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_Decibels;
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outParameterInfo.minValue = -12.0;
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outParameterInfo.maxValue = 12.0;
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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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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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// Tape::GetPropertyInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Tape::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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// Tape::GetProperty
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Tape::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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// Tape::Initialize
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Tape::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 ____TapeEffectKernel
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Tape::TapeKernel::Reset()
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void Tape::TapeKernel::Reset()
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{
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iirMidRollerA = 0.0;
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iirMidRollerB = 0.0;
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iirHeadBumpA = 0.0;
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iirHeadBumpB = 0.0;
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flip = false;
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for (int x = 0; x < 9; x++) {biquadA[x] = 0.0;biquadB[x] = 0.0;biquadC[x] = 0.0;biquadD[x] = 0.0;}
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lastSample = 0.0;
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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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// Tape::TapeKernel::Process
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void Tape::TapeKernel::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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Float64 inputgain = pow(10.0,GetParameter( kParam_One )/20.0);
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Float64 bumpgain = GetParameter( kParam_Two ) * 0.1;
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Float64 HeadBumpFreq = 0.12/overallscale;
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Float64 softness = 0.618033988749894848204586;
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Float64 RollAmount = (1.0 - softness) / overallscale;
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//[0] is frequency: 0.000001 to 0.499999 is near-zero to near-Nyquist
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//[1] is resonance, 0.7071 is Butterworth. Also can't be zero
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biquadA[0] = biquadB[0] = 0.0072/overallscale;
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biquadA[1] = biquadB[1] = 0.0009;
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double K = tan(M_PI * biquadB[0]);
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double norm = 1.0 / (1.0 + K / biquadB[1] + K * K);
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biquadA[2] = biquadB[2] = K / biquadB[1] * norm;
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biquadA[4] = biquadB[4] = -biquadB[2];
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biquadA[5] = biquadB[5] = 2.0 * (K * K - 1.0) * norm;
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biquadA[6] = biquadB[6] = (1.0 - K / biquadB[1] + K * K) * norm;
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biquadC[0] = biquadD[0] = 0.032/overallscale;
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biquadC[1] = biquadD[1] = 0.0007;
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K = tan(M_PI * biquadD[0]);
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norm = 1.0 / (1.0 + K / biquadD[1] + K * K);
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biquadC[2] = biquadD[2] = K / biquadD[1] * norm;
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biquadC[4] = biquadD[4] = -biquadD[2];
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biquadC[5] = biquadD[5] = 2.0 * (K * K - 1.0) * norm;
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biquadC[6] = biquadD[6] = (1.0 - K / biquadD[1] + K * K) * norm;
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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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if (inputgain < 1.0) {
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inputSample *= inputgain;
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} //gain cut before anything, even dry
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double drySample = inputSample;
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double HighsSample = 0.0;
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double NonHighsSample = 0.0;
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double tempSample;
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if (flip)
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{
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iirMidRollerA = (iirMidRollerA * (1.0 - RollAmount)) + (inputSample * RollAmount);
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HighsSample = inputSample - iirMidRollerA;
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NonHighsSample = iirMidRollerA;
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iirHeadBumpA += (inputSample * 0.05);
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iirHeadBumpA -= (iirHeadBumpA * iirHeadBumpA * iirHeadBumpA * HeadBumpFreq);
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iirHeadBumpA = sin(iirHeadBumpA);
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tempSample = (iirHeadBumpA * biquadA[2]) + biquadA[7];
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biquadA[7] = (iirHeadBumpA * biquadA[3]) - (tempSample * biquadA[5]) + biquadA[8];
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biquadA[8] = (iirHeadBumpA * biquadA[4]) - (tempSample * biquadA[6]);
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iirHeadBumpA = tempSample; //interleaved biquad
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if (iirHeadBumpA > 1.0) iirHeadBumpA = 1.0;
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if (iirHeadBumpA < -1.0) iirHeadBumpA = -1.0;
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iirHeadBumpA = asin(iirHeadBumpA);
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inputSample = sin(inputSample);
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tempSample = (inputSample * biquadC[2]) + biquadC[7];
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biquadC[7] = (inputSample * biquadC[3]) - (tempSample * biquadC[5]) + biquadC[8];
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biquadC[8] = (inputSample * biquadC[4]) - (tempSample * biquadC[6]);
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inputSample = tempSample; //interleaved biquad
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if (inputSample > 1.0) inputSample = 1.0;
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if (inputSample < -1.0) inputSample = -1.0;
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inputSample = asin(inputSample);
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} else {
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iirMidRollerB = (iirMidRollerB * (1.0 - RollAmount)) + (inputSample * RollAmount);
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HighsSample = inputSample - iirMidRollerB;
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NonHighsSample = iirMidRollerB;
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iirHeadBumpB += (inputSample * 0.05);
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iirHeadBumpB -= (iirHeadBumpB * iirHeadBumpB * iirHeadBumpB * HeadBumpFreq);
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iirHeadBumpB = sin(iirHeadBumpB);
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tempSample = (iirHeadBumpB * biquadB[2]) + biquadB[7];
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biquadB[7] = (iirHeadBumpB * biquadB[3]) - (tempSample * biquadB[5]) + biquadB[8];
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biquadB[8] = (iirHeadBumpB * biquadB[4]) - (tempSample * biquadB[6]);
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iirHeadBumpB = tempSample; //interleaved biquad
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if (iirHeadBumpB > 1.0) iirHeadBumpB = 1.0;
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if (iirHeadBumpB < -1.0) iirHeadBumpB = -1.0;
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iirHeadBumpB = asin(iirHeadBumpB);
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inputSample = sin(inputSample);
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tempSample = (inputSample * biquadD[2]) + biquadD[7];
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biquadD[7] = (inputSample * biquadD[3]) - (tempSample * biquadD[5]) + biquadD[8];
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biquadD[8] = (inputSample * biquadD[4]) - (tempSample * biquadD[6]);
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inputSample = tempSample; //interleaved biquad
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if (inputSample > 1.0) inputSample = 1.0;
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if (inputSample < -1.0) inputSample = -1.0;
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inputSample = asin(inputSample);
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}
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flip = !flip;
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double groundSample = drySample - inputSample; //set up UnBox
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if (inputgain > 1.0) {
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inputSample *= inputgain;
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} //gain boost inside UnBox: do not boost fringe audio
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double applySoften = fabs(HighsSample)*1.57079633;
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if (applySoften > 1.57079633) applySoften = 1.57079633;
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applySoften = 1-cos(applySoften);
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if (HighsSample > 0) inputSample -= applySoften;
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if (HighsSample < 0) inputSample += applySoften;
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//apply Soften depending on polarity
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if (inputSample > 1.2533141373155) inputSample = 1.2533141373155;
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if (inputSample < -1.2533141373155) inputSample = -1.2533141373155;
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//clip to 1.2533141373155 to reach maximum output
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inputSample = sin(inputSample * fabs(inputSample)) / ((fabs(inputSample) == 0.0) ?1:fabs(inputSample));
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//Spiral, for cleanest most optimal tape effect
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Float64 suppress = (1.0-fabs(inputSample)) * 0.00013;
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if (iirHeadBumpA > suppress) iirHeadBumpA -= suppress;
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if (iirHeadBumpA < -suppress) iirHeadBumpA += suppress;
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if (iirHeadBumpB > suppress) iirHeadBumpB -= suppress;
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if (iirHeadBumpB < -suppress) iirHeadBumpB += suppress;
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//restrain resonant quality of head bump algorithm
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inputSample += groundSample; //apply UnBox processing
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inputSample += ((iirHeadBumpA + iirHeadBumpB) * bumpgain);//and head bump
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if (lastSample >= 0.99)
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{
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if (inputSample < 0.99) lastSample = ((0.99*softness) + (inputSample * (1.0-softness)));
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else lastSample = 0.99;
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}
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if (lastSample <= -0.99)
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{
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if (inputSample > -0.99) lastSample = ((-0.99*softness) + (inputSample * (1.0-softness)));
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else lastSample = -0.99;
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}
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if (inputSample > 0.99)
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{
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if (lastSample < 0.99) inputSample = ((0.99*softness) + (lastSample * (1.0-softness)));
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else inputSample = 0.99;
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}
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if (inputSample < -0.99)
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{
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if (lastSample > -0.99) inputSample = ((-0.99*softness) + (lastSample * (1.0-softness)));
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else inputSample = -0.99;
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}
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lastSample = inputSample;
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if (inputSample > 0.99) inputSample = 0.99;
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if (inputSample < -0.99) inputSample = -0.99;
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//final iron bar
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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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