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298 lines
15 KiB
C++
Executable file
298 lines
15 KiB
C++
Executable file
/*
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* File: Crystal.cpp
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*
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* Version: 1.0
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*
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* Created: 12/9/18
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*
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* Copyright: Copyright © 2018 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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Crystal.cpp
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=============================================================================*/
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#include "Crystal.h"
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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AUDIOCOMPONENT_ENTRY(AUBaseFactory, Crystal)
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Crystal::Crystal
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Crystal::Crystal(AudioUnit component)
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: AUEffectBase(component)
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{
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CreateElements();
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Globals()->UseIndexedParameters(kNumberOfParameters);
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SetParameter(kParam_One, kDefaultValue_ParamOne );
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SetParameter(kParam_Two, kDefaultValue_ParamTwo );
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SetParameter(kParam_Three, kDefaultValue_ParamThree );
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SetParameter(kParam_Four, kDefaultValue_ParamFour );
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#if AU_DEBUG_DISPATCHER
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mDebugDispatcher = new AUDebugDispatcher (this);
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#endif
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Crystal::GetParameterValueStrings
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Crystal::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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// Crystal::GetParameterInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Crystal::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 = 3.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamThree;
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break;
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case kParam_Four:
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AUBase::FillInParameterName (outParameterInfo, kParameterFourName, false);
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outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
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outParameterInfo.minValue = 0.0;
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outParameterInfo.maxValue = 1.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamFour;
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break;
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default:
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result = kAudioUnitErr_InvalidParameter;
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break;
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}
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} else {
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result = kAudioUnitErr_InvalidParameter;
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}
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return result;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Crystal::GetPropertyInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Crystal::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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// Crystal::GetProperty
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Crystal::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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// Crystal::Initialize
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult Crystal::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 ____CrystalEffectKernel
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Crystal::CrystalKernel::Reset()
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void Crystal::CrystalKernel::Reset()
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{
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for(int count = 0; count < 34; count++) {b[count] = 0;}
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lastSample = 0.0;
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fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Crystal::CrystalKernel::Process
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void Crystal::CrystalKernel::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 threshold = GetParameter( kParam_One );
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Float64 hardness;
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Float64 breakup = (1.0-(threshold/2.0))*3.14159265358979;
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Float64 bridgerectifier;
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Float64 sqdrive = GetParameter( kParam_Two );
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if (sqdrive > 1.0) sqdrive *= sqdrive;
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sqdrive = sqrt(sqdrive);
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Float64 indrive = GetParameter( kParam_Three );
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if (indrive > 1.0) indrive *= indrive;
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indrive *= (1.0-(0.1695*sqdrive));
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//no gain loss of convolution for APIcolypse
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//calibrate this to match noise level with character at 1.0
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//you get for instance 0.819 and 1.0-0.819 is 0.181
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Float64 randy;
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Float64 outlevel = GetParameter( kParam_Four );
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if (threshold < 1) hardness = 1.0 / (1.0-threshold);
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else hardness = 999999999999999999999.0;
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//set up hardness to exactly fill gap between threshold and 0db
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//if threshold is literally 1 then hardness is infinite, so we make it very big
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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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inputSample *= indrive;
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//calibrated to match gain through convolution and -0.3 correction
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if (sqdrive > 0.0){
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b[23] = b[22]; b[22] = b[21]; b[21] = b[20]; b[20] = b[19]; b[19] = b[18]; b[18] = b[17]; b[17] = b[16]; b[16] = b[15];
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b[15] = b[14]; b[14] = b[13]; b[13] = b[12]; b[12] = b[11]; b[11] = b[10]; b[10] = b[9]; b[9] = b[8]; b[8] = b[7];
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b[7] = b[6]; b[6] = b[5]; b[5] = b[4]; b[4] = b[3]; b[3] = b[2]; b[2] = b[1]; b[1] = b[0]; b[0] = inputSample * sqdrive;
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inputSample += (b[1] * (0.38856694371895023 + (0.14001177830115491*fabs(b[1]))));
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inputSample -= (b[2] * (0.17469488984546111 + (0.05204541941091459*fabs(b[2]))));
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inputSample += (b[3] * (0.11643521461774288 - (0.01193121216518472*fabs(b[3]))));
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inputSample -= (b[4] * (0.08874416268268183 - (0.05867502375036486*fabs(b[4]))));
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inputSample += (b[5] * (0.07222999223073785 - (0.08519974113692971*fabs(b[5]))));
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inputSample -= (b[6] * (0.06103207678880003 - (0.09230674983449150*fabs(b[6]))));
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inputSample += (b[7] * (0.05277389277465404 - (0.08487342372497046*fabs(b[7]))));
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inputSample -= (b[8] * (0.04631144388636078 - (0.06976851898821038*fabs(b[8]))));
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inputSample += (b[9] * (0.04102721072495113 - (0.05337974329110802*fabs(b[9]))));
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inputSample -= (b[10] * (0.03656047655964371 - (0.03990914278458497*fabs(b[10]))));
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inputSample += (b[11] * (0.03268677450573373 - (0.03090433934018759*fabs(b[11]))));
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inputSample -= (b[12] * (0.02926012259262895 - (0.02585223214266682*fabs(b[12]))));
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inputSample += (b[13] * (0.02618257163789973 - (0.02326667039588473*fabs(b[13]))));
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inputSample -= (b[14] * (0.02338568277879992 - (0.02167067760829789*fabs(b[14]))));
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inputSample += (b[15] * (0.02082142324645262 - (0.02013392273267951*fabs(b[15]))));
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inputSample -= (b[16] * (0.01845525966656259 - (0.01833038930966512*fabs(b[16]))));
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inputSample += (b[17] * (0.01626113504980445 - (0.01631893218593511*fabs(b[17]))));
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inputSample -= (b[18] * (0.01422084088669267 - (0.01427828125219885*fabs(b[18]))));
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inputSample += (b[19] * (0.01231993595709338 - (0.01233991521342998*fabs(b[19]))));
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inputSample -= (b[20] * (0.01054774630451013 - (0.01054774630542346*fabs(b[20]))));
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inputSample += (b[21] * (0.00889548162355088 - (0.00889548162263755*fabs(b[21]))));
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inputSample -= (b[22] * (0.00735749099304526 - (0.00735749099395860*fabs(b[22]))));
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inputSample += (b[23] * (0.00592812350468000 - (0.00592812350376666*fabs(b[23]))));
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} //the Character plugins as individual processors did this. BussColors applies an averaging factor to produce
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// more of a consistent variation between soft and loud convolutions. For years I thought this code was a
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//mistake and did nothing, but in fact what it's doing is producing slightly different curves for every single
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//convolution kernel location: this will be true of the Character individual plugins as well.
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if (fabs(inputSample) > threshold)
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{
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bridgerectifier = (fabs(inputSample)-threshold)*hardness;
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//skip flat area if any, scale to distortion limit
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if (bridgerectifier > breakup) bridgerectifier = breakup;
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//max value for sine function, 'breakup' modeling for trashed console tone
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//more hardness = more solidness behind breakup modeling. more softness, more 'grunge' and sag
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bridgerectifier = sin(bridgerectifier)/hardness;
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//do the sine factor, scale back to proper amount
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if (inputSample > 0) inputSample = bridgerectifier+threshold;
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else inputSample = -(bridgerectifier+threshold);
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} //otherwise we leave it untouched by the overdrive stuff
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//this is the notorious New Channel Density algorithm. It's much less popular than the original Density,
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//because it introduces a point where the saturation 'curve' changes from straight to curved.
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//People don't like these discontinuities, but you can use them for effect or to grit up the sound.
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randy = ((double(fpd)/UINT32_MAX)*0.022);
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bridgerectifier = ((inputSample*(1-randy))+(lastSample*randy)) * outlevel;
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lastSample = inputSample;
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inputSample = bridgerectifier; //applies a tiny 'fuzz' to highs: from original Crystal.
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//This is akin to the old Chrome Oxide plugin, applying a fuzz to only the slews. The noise only appears
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//when current and old samples are different from each other, otherwise you can't tell it's there.
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//This is not only during silence but the tops of low frequency waves: it scales down to affect lows more gently.
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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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