mirror of
https://github.com/airwindows/airwindows.git
synced 2026-05-21 06:46:21 -06:00
446 lines
17 KiB
C++
Executable file
446 lines
17 KiB
C++
Executable file
/*
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* File: IronOxideClassic2.cpp
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*
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* Version: 1.0
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*
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* Created: 3/10/21
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*
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* Copyright: Copyright © 2021 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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IronOxideClassic2.cpp
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=============================================================================*/
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#include "IronOxideClassic2.h"
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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COMPONENT_ENTRY(IronOxideClassic2)
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// IronOxideClassic2::IronOxideClassic2
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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IronOxideClassic2::IronOxideClassic2(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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// IronOxideClassic2::GetParameterValueStrings
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult IronOxideClassic2::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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// IronOxideClassic2::GetParameterInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult IronOxideClassic2::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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// IronOxideClassic2::GetPropertyInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult IronOxideClassic2::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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// IronOxideClassic2::GetProperty
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult IronOxideClassic2::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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// IronOxideClassic2::Initialize
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult IronOxideClassic2::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 ____IronOxideClassic2EffectKernel
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// IronOxideClassic2::IronOxideClassic2Kernel::Reset()
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void IronOxideClassic2::IronOxideClassic2Kernel::Reset()
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{
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for (int x = 0; x < 11; x++) {biquadA[x] = 0.0;biquadB[x] = 0.0;}
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for (int temp = 0; temp < 263; temp++) {d[temp] = 0.0;}
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for(int count = 0; count < 6; count++) {lastRef[count] = 0.0;}
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cycle = 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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flip = true;
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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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// IronOxideClassic2::IronOxideClassic2Kernel::Process
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void IronOxideClassic2::IronOxideClassic2Kernel::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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int cycleEnd = floor(overallscale);
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if (cycleEnd < 1) cycleEnd = 1;
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if (cycleEnd > 4) cycleEnd = 4;
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//this is going to be 2 for 88.1 or 96k, 3 for silly people, 4 for 176 or 192k
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if (cycle > cycleEnd-1) cycle = cycleEnd-1; //sanity check
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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 fastTaper = ips/15.0;
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Float64 slowTaper = 2.0/(ips*ips);
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iirAmount /= overallscale;
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fastTaper /= overallscale;
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slowTaper /= overallscale;
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//now that we have this, we must multiply it back up
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fastTaper *= cycleEnd;
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slowTaper *= cycleEnd;
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//because we're only running that part one sample in two, or three, or four
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fastTaper += 1.0;
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slowTaper += 1.0;
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biquadA[0] = 24000.0 / GetSampleRate();
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biquadA[1] = 1.618033988749894848204586;
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biquadB[0] = 24000.0 / GetSampleRate();
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biquadB[1] = 0.618033988749894848204586;
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double K = tan(M_PI * biquadA[0]); //lowpass
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double norm = 1.0 / (1.0 + K / biquadA[1] + K * K);
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biquadA[2] = K * K * norm;
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biquadA[3] = 2.0 * biquadA[2];
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biquadA[4] = biquadA[2];
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biquadA[5] = 2.0 * (K * K - 1.0) * norm;
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biquadA[6] = (1.0 - K / biquadA[1] + K * K) * norm;
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K = tan(M_PI * biquadB[0]); //lowpass
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norm = 1.0 / (1.0 + K / biquadB[1] + K * K);
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biquadB[2] = K * K * norm;
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biquadB[3] = 2.0 * biquadB[2];
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biquadB[4] = biquadB[2];
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biquadB[5] = 2.0 * (K * K - 1.0) * norm;
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biquadB[6] = (1.0 - K / biquadB[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 (flip)
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{
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if (fabs(iirSampleA)<1.18e-37) iirSampleA = 0.0;
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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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if (fabs(iirSampleB)<1.18e-37) iirSampleB = 0.0;
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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 (biquadA[0] < 0.49999) {
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double tempSample = biquadA[2]*inputSample+biquadA[3]*biquadA[7]+biquadA[4]*biquadA[8]-biquadA[5]*biquadA[9]-biquadA[6]*biquadA[10];
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biquadA[8] = biquadA[7]; biquadA[7] = inputSample; inputSample = tempSample;
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biquadA[10] = biquadA[9]; biquadA[9] = inputSample; //DF1
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}
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if (inputgain != 1.0) inputSample *= inputgain;
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double 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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cycle++;
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if (cycle == cycleEnd) { //hit the end point and we do a tape sample
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if (gcount < 0 || gcount > 131) gcount = 131;
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int count = gcount;
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//increment the counter
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double temp;
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d[count+131] = d[count] = inputSample;
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if (flip)
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{
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if (fabs(fastIIRA)<1.18e-37) fastIIRA = 0.0;
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if (fabs(slowIIRA)<1.18e-37) slowIIRA = 0.0;
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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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if (fabs(fastIIRB)<1.18e-37) fastIIRB = 0.0;
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if (fabs(slowIIRB)<1.18e-37) slowIIRB = 0.0;
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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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if (cycleEnd == 4) {
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lastRef[0] = lastRef[4]; //start from previous last
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lastRef[2] = (lastRef[0] + inputSample)/2; //half
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lastRef[1] = (lastRef[0] + lastRef[2])/2; //one quarter
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lastRef[3] = (lastRef[2] + inputSample)/2; //three quarters
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lastRef[4] = inputSample; //full
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}
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if (cycleEnd == 3) {
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lastRef[0] = lastRef[3]; //start from previous last
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lastRef[2] = (lastRef[0]+lastRef[0]+inputSample)/3; //third
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lastRef[1] = (lastRef[0]+inputSample+inputSample)/3; //two thirds
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lastRef[3] = inputSample; //full
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}
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if (cycleEnd == 2) {
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lastRef[0] = lastRef[2]; //start from previous last
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lastRef[1] = (lastRef[0] + inputSample)/2; //half
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lastRef[2] = inputSample; //full
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}
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if (cycleEnd == 1) lastRef[0] = inputSample;
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cycle = 0; //reset
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inputSample = lastRef[cycle];
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} else {
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inputSample = lastRef[cycle];
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//we are going through our references now
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}
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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 (biquadB[0] < 0.49999) {
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double tempSample = biquadB[2]*inputSample+biquadB[3]*biquadB[7]+biquadB[4]*biquadB[8]-biquadB[5]*biquadB[9]-biquadB[6]*biquadB[10];
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biquadB[8] = biquadB[7]; biquadB[7] = inputSample; inputSample = tempSample;
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biquadB[10] = biquadB[9]; biquadB[9] = inputSample; //DF1
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}
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if (outputgain != 1.0) inputSample *= outputgain;
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flip = !flip;
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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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