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362 lines
15 KiB
C++
362 lines
15 KiB
C++
/*
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* File: TapeDelay2.cpp
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*
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* Version: 1.0
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*
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* Created: 7/19/21
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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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TapeDelay2.cpp
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=============================================================================*/
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#include "TapeDelay2.h"
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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COMPONENT_ENTRY(TapeDelay2)
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// TapeDelay2::TapeDelay2
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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TapeDelay2::TapeDelay2(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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SetParameter(kParam_Five, kDefaultValue_ParamFive );
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SetParameter(kParam_Six, kDefaultValue_ParamSix );
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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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// TapeDelay2::GetParameterValueStrings
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult TapeDelay2::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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// TapeDelay2::GetParameterInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult TapeDelay2::GetParameterInfo(AudioUnitScope inScope,
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AudioUnitParameterID inParameterID,
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AudioUnitParameterInfo &outParameterInfo )
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{
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ComponentResult result = noErr;
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outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
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| kAudioUnitParameterFlag_IsReadable;
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if (inScope == kAudioUnitScope_Global) {
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switch(inParameterID)
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{
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case kParam_One:
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AUBase::FillInParameterName (outParameterInfo, kParameterOneName, false);
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outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
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outParameterInfo.minValue = 0.0;
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outParameterInfo.maxValue = 1.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamOne;
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break;
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case kParam_Two:
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AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false);
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outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
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outParameterInfo.minValue = 0.0;
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outParameterInfo.maxValue = 1.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
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break;
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case kParam_Three:
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AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false);
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outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
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outParameterInfo.minValue = 0.0;
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outParameterInfo.maxValue = 1.0;
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outParameterInfo.defaultValue = kDefaultValue_ParamThree;
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break;
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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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case kParam_Five:
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AUBase::FillInParameterName (outParameterInfo, kParameterFiveName, 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_ParamFive;
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break;
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case kParam_Six:
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AUBase::FillInParameterName (outParameterInfo, kParameterSixName, 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_ParamSix;
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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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// TapeDelay2::GetPropertyInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult TapeDelay2::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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// TapeDelay2::GetProperty
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult TapeDelay2::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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// TapeDelay2::Initialize
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult TapeDelay2::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 ____TapeDelay2EffectKernel
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// TapeDelay2::TapeDelay2Kernel::Reset()
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void TapeDelay2::TapeDelay2Kernel::Reset()
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{
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for(int x = 0; x < 88210; x++) {d[x] = 0.0;}
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prevSample = 0.0;
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delay = 0.0;
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sweep = 0.0;
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for (int x = 0; x < 9; x++) {regenFilter[x] = 0.0; outFilter[x] = 0.0;}
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for (int x = 0; x < 9; x++) {lastRef[x] = 0.0;}
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cycle = 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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// TapeDelay2::TapeDelay2Kernel::Process
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void TapeDelay2::TapeDelay2Kernel::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 baseSpeed = (pow(GetParameter( kParam_One ),4)*25.0)+1.0;
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Float64 feedback = pow(GetParameter( kParam_Two ),2);
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//[0] is frequency: 0.000001 to 0.499999 is near-zero to near-Nyquist
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//[1] is resonance, 0.7071 is Butterworth. Also can't be zero
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regenFilter[0] = ((pow(GetParameter( kParam_Three ),3)*0.4)+0.0001);
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regenFilter[1] = pow(GetParameter( kParam_Four ),2)+0.01; //resonance
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double K = tan(M_PI * regenFilter[0]);
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double norm = 1.0 / (1.0 + K / regenFilter[1] + K * K);
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regenFilter[2] = K / regenFilter[1] * norm;
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regenFilter[4] = -regenFilter[2];
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regenFilter[5] = 2.0 * (K * K - 1.0) * norm;
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regenFilter[6] = (1.0 - K / regenFilter[1] + K * K) * norm;
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//[0] is frequency: 0.000001 to 0.499999 is near-zero to near-Nyquist
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//[1] is resonance, 0.7071 is Butterworth. Also can't be zero
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outFilter[0] = regenFilter[0];
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outFilter[1] = regenFilter[1] * 1.618033988749894848204586; //resonance
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K = tan(M_PI * outFilter[0]);
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norm = 1.0 / (1.0 + K / outFilter[1] + K * K);
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outFilter[2] = K / outFilter[1] * norm;
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outFilter[4] = -outFilter[2];
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outFilter[5] = 2.0 * (K * K - 1.0) * norm;
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outFilter[6] = (1.0 - K / outFilter[1] + K * K) * norm;
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Float64 vibSpeed = pow(GetParameter( kParam_Five ),5) * baseSpeed * ((regenFilter[0]*0.09)+0.025);//0.05
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Float64 wet = GetParameter( kParam_Six )*2.0;
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Float64 dry = 2.0 - wet;
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if (wet > 1.0) wet = 1.0;
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if (wet < 0.0) wet = 0.0;
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if (dry > 1.0) dry = 1.0;
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if (dry < 0.0) dry = 0.0;
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//this echo makes 50% full dry AND full wet, not crossfaded.
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//that's so it can be on submixes without cutting back dry channel when adjusted:
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//unless you go super heavy, you are only adjusting the added echo loudness.
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while (nSampleFrames-- > 0) {
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double inputSample = *sourceP;
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if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17;
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double drySample = inputSample;
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cycle++;
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if (cycle == cycleEnd) {
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Float64 speed = baseSpeed + (vibSpeed * (sin(sweep)+1.0));
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sweep += (0.05*inputSample*inputSample); if (sweep > 6.283185307179586) sweep -= 6.283185307179586;
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int pos = floor(delay);
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Float64 newSample = inputSample + d[pos]*feedback;
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double tempSample = (newSample * regenFilter[2]) + regenFilter[7];
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regenFilter[7] = -(tempSample * regenFilter[5]) + regenFilter[8];
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regenFilter[8] = (newSample * regenFilter[4]) - (tempSample * regenFilter[6]);
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newSample = tempSample;
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delay -= speed; if (delay < 0) delay += 88200.0;
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Float64 increment = (newSample - prevSample) / speed;
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d[pos] = prevSample;
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while (pos != floor(delay)) {
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d[pos] = prevSample;
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prevSample += increment;
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pos--; if (pos < 0) pos += 88200;
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}
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prevSample = newSample;
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pos = floor(delay); inputSample = d[pos];
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tempSample = (inputSample * outFilter[2]) + outFilter[7];
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outFilter[7] = -(tempSample * outFilter[5]) + outFilter[8];
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outFilter[8] = (inputSample * outFilter[4]) - (tempSample * outFilter[6]);
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inputSample = tempSample;
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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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switch (cycleEnd) //multi-pole average using lastRef[] variables
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{
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case 4:
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lastRef[8] = inputSample; inputSample = (inputSample+lastRef[7])*0.5;
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lastRef[7] = lastRef[8]; //continue, do not break
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case 3:
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lastRef[8] = inputSample; inputSample = (inputSample+lastRef[6])*0.5;
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lastRef[6] = lastRef[8]; //continue, do not break
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case 2:
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lastRef[8] = inputSample; inputSample = (inputSample+lastRef[5])*0.5;
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lastRef[5] = lastRef[8]; //continue, do not break
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case 1:
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break; //no further averaging
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}
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if (wet < 1.0) inputSample *= wet;
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if (dry < 1.0) drySample *= dry;
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inputSample += drySample;
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//this is our submix echo dry/wet: 0.5 is BOTH at FULL VOLUME
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//purpose is that, if you're adding echo, you're not altering other balances
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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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