mirror of
https://github.com/airwindows/airwindows.git
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372 lines
14 KiB
C++
Executable file
372 lines
14 KiB
C++
Executable file
/*
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* File: IronOxideClassic.cpp
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*
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* Version: 1.0
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*
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* Created: 5/13/17
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*
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* Copyright: Copyright © 2017 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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IronOxideClassic.cpp
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=============================================================================*/
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#include "IronOxideClassic.h"
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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COMPONENT_ENTRY(IronOxideClassic)
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// IronOxideClassic::IronOxideClassic
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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IronOxideClassic::IronOxideClassic(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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// IronOxideClassic::GetParameterValueStrings
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult IronOxideClassic::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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// IronOxideClassic::GetParameterInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult IronOxideClassic::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 = -18.0;
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outParameterInfo.maxValue = 18.0;
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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_CustomUnit;
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outParameterInfo.flags |= kAudioUnitParameterFlag_DisplayLogarithmic;
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outParameterInfo.unitName = kParameterTwoUnit;
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outParameterInfo.minValue = 1.5;
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outParameterInfo.maxValue = 150.0;
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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_Decibels;
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outParameterInfo.minValue = -18.0;
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outParameterInfo.maxValue = 18.0;
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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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// IronOxideClassic::GetPropertyInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult IronOxideClassic::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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// IronOxideClassic::GetProperty
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult IronOxideClassic::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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// IronOxideClassic::Initialize
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult IronOxideClassic::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 ____IronOxideClassicEffectKernel
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// IronOxideClassic::IronOxideClassicKernel::Reset()
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void IronOxideClassic::IronOxideClassicKernel::Reset()
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{
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for (int temp = 0; temp < 263; temp++) {d[temp] = 0.0;}
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gcount = 0;
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fastIIRA = fastIIRB = slowIIRA = slowIIRB = 0.0;
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iirSampleA = iirSampleB = 0.0;
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fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX;
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fpFlip = true;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// IronOxideClassic::IronOxideClassicKernel::Process
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void IronOxideClassic::IronOxideClassicKernel::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 inputgain = pow(10.0,GetParameter( kParam_One )/20.0);
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Float64 outputgain = pow(10.0,GetParameter( kParam_Three )/20.0);
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Float64 ips = GetParameter( kParam_Two ) * 1.1;
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//slight correction to dial in convincing ips settings
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if (ips < 1 || ips > 200){ips=33.0;}
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//sanity checks are always key
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Float64 iirAmount = ips/430.0; //for low leaning
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Float64 bridgerectifier;
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Float64 fastTaper = ips/15.0;
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Float64 slowTaper = 2.0/(ips*ips);
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Float64 lowspeedscale = (5.0/ips);
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double inputSample;
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SInt32 count;
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Float64 temp;
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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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if (overallscale == 0) {fastTaper += 1.0; slowTaper += 1.0;}
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else
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{
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iirAmount /= overallscale;
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lowspeedscale *= overallscale;
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fastTaper = 1.0 + (fastTaper / overallscale);
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slowTaper = 1.0 + (slowTaper / overallscale);
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}
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while (nSampleFrames-- > 0) {
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inputSample = *sourceP;
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if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17;
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if (fpFlip)
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{
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iirSampleA = (iirSampleA * (1 - iirAmount)) + (inputSample * iirAmount);
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inputSample -= iirSampleA;
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}
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else
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{
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iirSampleB = (iirSampleB * (1 - iirAmount)) + (inputSample * iirAmount);
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inputSample -= iirSampleB;
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}
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//do IIR highpass for leaning out
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if (inputgain != 1.0) inputSample *= inputgain;
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bridgerectifier = fabs(inputSample);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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bridgerectifier = sin(bridgerectifier);
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if (inputSample > 0.0) inputSample = bridgerectifier;
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else inputSample = -bridgerectifier;
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if (gcount < 0 || gcount > 131) {gcount = 131;}
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count = gcount;
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//increment the counter
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d[count+131] = d[count] = inputSample;
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if (fpFlip)
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{
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fastIIRA = fastIIRA/fastTaper;
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slowIIRA = slowIIRA/slowTaper;
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//scale stuff down
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fastIIRA += d[count];
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count += 3;
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temp = d[count+127];
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temp += d[count+113];
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temp += d[count+109];
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temp += d[count+107];
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temp += d[count+103];
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temp += d[count+101];
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temp += d[count+97];
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temp += d[count+89];
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temp += d[count+83];
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temp /= 2;
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temp += d[count+79];
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temp += d[count+73];
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temp += d[count+71];
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temp += d[count+67];
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temp += d[count+61];
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temp += d[count+59];
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temp += d[count+53];
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temp += d[count+47];
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temp += d[count+43];
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temp += d[count+41];
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temp += d[count+37];
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temp += d[count+31];
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temp += d[count+29];
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temp /= 2;
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temp += d[count+23];
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temp += d[count+19];
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temp += d[count+17];
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temp += d[count+13];
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temp += d[count+11];
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temp /= 2;
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temp += d[count+7];
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temp += d[count+5];
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temp += d[count+3];
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temp /= 2;
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temp += d[count+2];
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temp += d[count+1];
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slowIIRA += (temp/128);
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inputSample = fastIIRA - (slowIIRA / slowTaper);
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}
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else
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{
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fastIIRB = fastIIRB/fastTaper;
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slowIIRB = slowIIRB/slowTaper;
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//scale stuff down
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fastIIRB += d[count];
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count += 3;
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temp = d[count+127];
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temp += d[count+113];
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temp += d[count+109];
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temp += d[count+107];
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temp += d[count+103];
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temp += d[count+101];
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temp += d[count+97];
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temp += d[count+89];
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temp += d[count+83];
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temp /= 2;
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temp += d[count+79];
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temp += d[count+73];
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temp += d[count+71];
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temp += d[count+67];
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temp += d[count+61];
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temp += d[count+59];
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temp += d[count+53];
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temp += d[count+47];
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temp += d[count+43];
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temp += d[count+41];
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temp += d[count+37];
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temp += d[count+31];
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temp += d[count+29];
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temp /= 2;
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temp += d[count+23];
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temp += d[count+19];
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temp += d[count+17];
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temp += d[count+13];
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temp += d[count+11];
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temp /= 2;
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temp += d[count+7];
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temp += d[count+5];
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temp += d[count+3];
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temp /= 2;
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temp += d[count+2];
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temp += d[count+1];
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slowIIRB += (temp/128);
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inputSample = fastIIRB - (slowIIRB / slowTaper);
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}
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inputSample /= fastTaper;
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inputSample /= lowspeedscale;
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bridgerectifier = fabs(inputSample);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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bridgerectifier = sin(bridgerectifier);
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//can use as an output limiter
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if (inputSample > 0.0) inputSample = bridgerectifier;
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else inputSample = -bridgerectifier;
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//second stage of overdrive to prevent overs and allow bloody loud extremeness
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if (outputgain != 1.0) inputSample *= outputgain;
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fpFlip = !fpFlip;
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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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