mirror of
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338 lines
14 KiB
C++
Executable file
338 lines
14 KiB
C++
Executable file
/*
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* File: Pop.cpp
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*
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* Version: 1.0
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*
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* Created: 10/9/10
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*
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* Copyright: Copyright © 2010 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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Pop.h
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=============================================================================*/
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#include "Pop.h"
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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COMPONENT_ENTRY(Pop)
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Pop::Pop
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Pop::Pop(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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#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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// Pop::GetParameterValueStrings
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Pop::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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// Pop::GetParameterInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Pop::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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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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// Pop::GetPropertyInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Pop::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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// Pop::GetProperty
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Pop::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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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Pop::Initialize
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Pop::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 ____PopEffectKernel
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Pop::PopKernel::Reset()
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void Pop::PopKernel::Reset()
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{
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for(int count = 0; count < 10000; count++) {d[count] = 0;}
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delay = 0;
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muSpeedA = 10000;
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muSpeedB = 10000;
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muCoefficientA = 1;
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muCoefficientB = 1;
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thicken = 1;
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muVary = 1;
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flip = false;
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previous = 0.0;
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previous2 = 0.0;
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previous3 = 0.0;
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previous4 = 0.0;
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previous5 = 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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// Pop::PopKernel::Process
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void Pop::PopKernel::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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Float64 overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= GetSampleRate();
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Float64 highGainOffset = pow(GetParameter( kParam_One ),2)*0.023;
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Float64 threshold = 1.001 - (1.0-pow(1.0-GetParameter( kParam_One ),5));
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Float64 muMakeupGain = sqrt(1.0 / threshold);
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//gain settings around threshold
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Float64 release = (GetParameter( kParam_One )*100000.0) + 300000.0;
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int maxdelay = (int)(1450.0 * overallscale);
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if (maxdelay > 9999) maxdelay = 9999;
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release /= overallscale;
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Float64 fastest = sqrt(release);
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//speed settings around release
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Float64 output = GetParameter( kParam_Two );
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Float64 wet = GetParameter( kParam_Three );
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// µ µ µ µ µ µ µ µ µ µ µ µ is the kitten song o/~
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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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d[delay] = inputSample;
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delay--;
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if (delay < 0 || delay > maxdelay) {delay = maxdelay;}
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//yes this is a second bounds check. it's cheap, check EVERY time
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inputSample = (inputSample * thicken) + (d[delay] * (1.0-thicken));
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double lowestSample = inputSample;
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if (fabs(inputSample) > fabs(previous)) lowestSample = previous;
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if (fabs(lowestSample) > fabs(previous2)) lowestSample = (lowestSample + previous2) / 1.99;
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if (fabs(lowestSample) > fabs(previous3)) lowestSample = (lowestSample + previous3) / 1.98;
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if (fabs(lowestSample) > fabs(previous4)) lowestSample = (lowestSample + previous4) / 1.97;
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if (fabs(lowestSample) > fabs(previous5)) lowestSample = (lowestSample + previous5) / 1.96;
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previous5 = previous4;
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previous4 = previous3;
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previous3 = previous2;
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previous2 = previous;
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previous = inputSample;
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inputSample *= muMakeupGain;
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Float64 punchiness = 0.95-fabs(inputSample*0.08);
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if (punchiness < 0.65) punchiness = 0.65;
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if (flip)
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{
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if (fabs(lowestSample) > threshold)
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{
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muVary = threshold / fabs(lowestSample);
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muAttack = sqrt(fabs(muSpeedA));
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muCoefficientA = muCoefficientA * (muAttack-1.0);
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if (muVary < threshold)
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{
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muCoefficientA = muCoefficientA + threshold;
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}
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else
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{
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muCoefficientA = muCoefficientA + muVary;
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}
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muCoefficientA = muCoefficientA / muAttack;
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}
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else
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{
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muCoefficientA = muCoefficientA * ((muSpeedA * muSpeedA)-1.0);
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muCoefficientA = muCoefficientA + 1.0;
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muCoefficientA = muCoefficientA / (muSpeedA * muSpeedA);
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}
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muNewSpeed = muSpeedA * (muSpeedA-1);
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muNewSpeed = muNewSpeed + fabs(lowestSample*release)+fastest;
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muSpeedA = muNewSpeed / muSpeedA;
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}
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else
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{
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if (fabs(lowestSample) > threshold)
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{
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muVary = threshold / fabs(lowestSample);
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muAttack = sqrt(fabs(muSpeedB));
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muCoefficientB = muCoefficientB * (muAttack-1);
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if (muVary < threshold)
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{
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muCoefficientB = muCoefficientB + threshold;
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}
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else
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{
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muCoefficientB = muCoefficientB + muVary;
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}
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muCoefficientB = muCoefficientB / muAttack;
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}
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else
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{
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muCoefficientB = muCoefficientB * ((muSpeedB * muSpeedB)-1.0);
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muCoefficientB = muCoefficientB + 1.0;
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muCoefficientB = muCoefficientB / (muSpeedB * muSpeedB);
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}
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muNewSpeed = muSpeedB * (muSpeedB-1);
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muNewSpeed = muNewSpeed + fabs(lowestSample*release)+fastest;
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muSpeedB = muNewSpeed / muSpeedB;
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}
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//got coefficients, adjusted speeds
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double coefficient = highGainOffset;
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if (flip) coefficient += pow(muCoefficientA,2);
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else coefficient += pow(muCoefficientB,2);
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inputSample *= coefficient;
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thicken = (coefficient/5)+punchiness;//0.80;
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thicken = (1.0-wet)+(wet*thicken);
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//applied compression with vari-vari-µ-µ-µ-µ-µ-µ-is-the-kitten-song o/~
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//applied gain correction to control output level- tends to constrain sound rather than inflate it
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double bridgerectifier = fabs(inputSample);
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if (bridgerectifier > 1.2533141373155) bridgerectifier = 1.2533141373155;
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bridgerectifier = sin(bridgerectifier * fabs(bridgerectifier)) / ((fabs(bridgerectifier) == 0.0) ?1:fabs(bridgerectifier));
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//using Spiral instead of Density algorithm
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if (inputSample > 0) inputSample = (inputSample*coefficient)+(bridgerectifier*(1-coefficient));
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else inputSample = (inputSample*coefficient)-(bridgerectifier*(1-coefficient));
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//second stage of overdrive to prevent overs and allow bloody loud extremeness
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flip = !flip;
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if (output < 1.0) inputSample *= output;
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if (wet < 1.0) inputSample = (drySample*(1.0-wet))+(inputSample*wet);
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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 += static_cast<int32_t>(fpd) * 5.960464655174751e-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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