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463 lines
21 KiB
C++
Executable file
463 lines
21 KiB
C++
Executable file
/*
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* File: ToTape5.cpp
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*
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* Version: 1.0
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*
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* Created: 6/24/17
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*
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* Copyright: Copyright © 2017 Airwindows, Airwindows uses the MIT license
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*
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* Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in
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* consideration of your agreement to the following terms, and your use, installation, modification
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* or redistribution of this Apple software constitutes acceptance of these terms. If you do
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* not agree with these terms, please do not use, install, modify or redistribute this Apple
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* software.
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*
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* In consideration of your agreement to abide by the following terms, and subject to these terms,
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* Apple grants you a personal, non-exclusive license, under Apple's copyrights in this
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* original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the
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* Apple Software, with or without modifications, in source and/or binary forms; provided that if you
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* redistribute the Apple Software in its entirety and without modifications, you must retain this
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* notice and the following text and disclaimers in all such redistributions of the Apple Software.
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* Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to
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* endorse or promote products derived from the Apple Software without specific prior written
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* permission from Apple. Except as expressly stated in this notice, no other rights or
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* licenses, express or implied, are granted by Apple herein, including but not limited to any
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* patent rights that may be infringed by your derivative works or by other works in which the
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* Apple Software may be incorporated.
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*
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* The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR
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* IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE
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* OR IN COMBINATION WITH YOUR PRODUCTS.
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*
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* IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
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* REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER
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* UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN
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* IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*=============================================================================
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ToTape5.cpp
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=============================================================================*/
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#include "ToTape5.h"
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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COMPONENT_ENTRY(ToTape5)
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// ToTape5::ToTape5
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ToTape5::ToTape5(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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// ToTape5::GetParameterValueStrings
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult ToTape5::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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// ToTape5::GetParameterInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult ToTape5::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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// ToTape5::GetPropertyInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult ToTape5::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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// ToTape5::GetProperty
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult ToTape5::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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// ToTape5::Initialize
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult ToTape5::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 ____ToTape5EffectKernel
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// ToTape5::ToTape5Kernel::Reset()
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void ToTape5::ToTape5Kernel::Reset()
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{
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iirMidRollerA = 0.0;
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iirMidRollerB = 0.0;
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iirMidRollerC = 0.0;
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iirHeadBumpA = 0.0;
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iirHeadBumpB = 0.0;
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iirHeadBumpC = 0.0;
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iirMinHeadBump = 0.0;
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iirSampleA = 0.0;
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iirSampleB = 0.0;
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iirSampleC = 0.0;
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iirSampleD = 0.0;
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iirSampleE = 0.0;
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iirSampleF = 0.0;
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iirSampleG = 0.0;
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iirSampleH = 0.0;
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iirSampleI = 0.0;
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iirSampleJ = 0.0;
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iirSampleK = 0.0;
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iirSampleL = 0.0;
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iirSampleM = 0.0;
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iirSampleN = 0.0;
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iirSampleO = 0.0;
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iirSampleP = 0.0;
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iirSampleQ = 0.0;
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iirSampleR = 0.0;
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iirSampleS = 0.0;
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iirSampleT = 0.0;
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iirSampleU = 0.0;
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iirSampleV = 0.0;
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iirSampleW = 0.0;
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iirSampleX = 0.0;
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iirSampleY = 0.0;
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iirSampleZ = 0.0;
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flip = 0;
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for (int temp = 0; temp < 999; temp++) {d[temp] = 0.0; e[temp] = 0.0;}
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gcount = 0;
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hcount = 0;
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sweep = 0.0;
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rateof = 0.5;
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nextmax = 0.5;
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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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// ToTape5::ToTape5Kernel::Process
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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void ToTape5::ToTape5Kernel::Process( const Float32 *inSourceP,
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Float32 *inDestP,
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UInt32 inFramesToProcess,
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UInt32 inNumChannels,
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bool &ioSilence )
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{
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UInt32 nSampleFrames = inFramesToProcess;
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const Float32 *sourceP = inSourceP;
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Float32 *destP = inDestP;
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Float64 overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= GetSampleRate();
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double fpOld = 0.618033988749894848204586; //golden ratio!
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Float64 inputgain = pow(GetParameter( kParam_One )+1.0,3);
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Float64 outputgain = GetParameter( kParam_Five );
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Float64 wet = GetParameter( kParam_Six );
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//removed unnecessary dry variable
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Float64 trim = 0.211324865405187117745425;
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Float64 SoftenControl = pow(GetParameter( kParam_Two ),2);
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Float64 tempRandy = 0.06 + (SoftenControl/10.0);
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//Float64 RollAmount = (1.0-((SoftenControl * 0.45)/overallscale));
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Float64 RollAmount = (1.0-(SoftenControl * 0.45))/overallscale;
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Float64 HeadBumpControl = pow(GetParameter( kParam_Three ),2);
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int allpasstemp;
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int maxdelay = (int)(floor(((HeadBumpControl+0.3)*2.2)*overallscale));
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HeadBumpControl *= fabs(HeadBumpControl);
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Float64 HeadBumpFreq = 0.044/overallscale;
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Float64 iirAmount = 0.000001/overallscale;
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Float64 altAmount = 1.0 - iirAmount;
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Float64 iirHBoostAmount = 0.0001/overallscale;
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Float64 altHBoostAmount = 1.0 - iirAmount;
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Float64 depth = pow(GetParameter( kParam_Four ),2)*overallscale;
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Float64 fluttertrim = 0.005/overallscale;
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Float64 sweeptrim = (0.0006*depth)/overallscale;
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Float64 offset;
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Float64 tupi = 3.141592653589793238 * 2.0;
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Float64 newrate = 0.005/overallscale;
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Float64 oldrate = 1.0-newrate;
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Float64 HighsSample = 0.0;
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Float64 NonHighsSample = 0.0;
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Float64 HeadBump = 0.0;
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Float64 Subtract;
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Float64 bridgerectifier;
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Float64 flutterrandy;
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Float64 randy;
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Float64 invrandy;
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SInt32 count;
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Float64 tempSample;
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Float64 drySample;
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double inputSample;
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while (nSampleFrames-- > 0) {
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inputSample = *sourceP;
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if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17;
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drySample = inputSample;
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flutterrandy = (double(fpd)/UINT32_MAX);
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randy = flutterrandy * tempRandy; //for soften
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invrandy = (1.0-randy);
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randy /= 2.0;
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//we've set up so that we dial in the amount of the alt sections (in pairs) with invrandy being the source section
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//now we've got a random flutter, so we're messing with the pitch before tape effects go on
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if (gcount < 0 || gcount > 300) {gcount = 300;}
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count = gcount;
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d[count+301] = d[count] = inputSample;
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gcount--;
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//we will also keep the buffer going, even when not in use
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if (depth != 0.0) {
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offset = (1.0 + sin(sweep)) * depth;
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count += (int)floor(offset);
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bridgerectifier = (d[count] * (1-(offset-floor(offset))));
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bridgerectifier += (d[count+1] * (offset-floor(offset)));
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bridgerectifier -= ((d[count+2] * (offset-floor(offset)))*trim);
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rateof = (nextmax * newrate) + (rateof * oldrate);
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sweep += rateof * fluttertrim;
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sweep += sweep * sweeptrim;
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if (sweep >= tupi){sweep = 0.0; nextmax = 0.02 + (flutterrandy*0.98);}
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inputSample = bridgerectifier;
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//apply to input signal only when flutter is present, interpolate samples
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}
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if (inputgain != 1.0) {
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inputSample *= inputgain;
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}
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if (flip < 1 || flip > 3) flip = 1;
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switch (flip)
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{
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case 1:
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iirMidRollerA = (iirMidRollerA * (1.0 - RollAmount)) + (inputSample * RollAmount);
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iirMidRollerA = (invrandy * iirMidRollerA) + (randy * iirMidRollerB) + (randy * iirMidRollerC);
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HighsSample = inputSample - iirMidRollerA;
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NonHighsSample = iirMidRollerA;
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iirHeadBumpA += (inputSample * 0.05);
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iirHeadBumpA -= (iirHeadBumpA * iirHeadBumpA * iirHeadBumpA * HeadBumpFreq);
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iirHeadBumpA = (invrandy * iirHeadBumpA) + (randy * iirHeadBumpB) + (randy * iirHeadBumpC);
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break;
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case 2:
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iirMidRollerB = (iirMidRollerB * (1.0 - RollAmount)) + (inputSample * RollAmount);
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iirMidRollerB = (randy * iirMidRollerA) + (invrandy * iirMidRollerB) + (randy * iirMidRollerC);
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HighsSample = inputSample - iirMidRollerB;
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NonHighsSample = iirMidRollerB;
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iirHeadBumpB += (inputSample * 0.05);
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iirHeadBumpB -= (iirHeadBumpB * iirHeadBumpB * iirHeadBumpB * HeadBumpFreq);
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iirHeadBumpB = (randy * iirHeadBumpA) + (invrandy * iirHeadBumpB) + (randy * iirHeadBumpC);
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break;
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case 3:
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iirMidRollerC = (iirMidRollerC * (1.0 - RollAmount)) + (inputSample * RollAmount);
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iirMidRollerC = (randy * iirMidRollerA) + (randy * iirMidRollerB) + (invrandy * iirMidRollerC);
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HighsSample = inputSample - iirMidRollerC;
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NonHighsSample = iirMidRollerC;
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iirHeadBumpC += (inputSample * 0.05);
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iirHeadBumpC -= (iirHeadBumpC * iirHeadBumpC * iirHeadBumpC * HeadBumpFreq);
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iirHeadBumpC = (randy * iirHeadBumpA) + (randy * iirHeadBumpB) + (invrandy * iirHeadBumpC);
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break;
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}
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flip++; //increment the triplet counter
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Subtract = HighsSample;
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bridgerectifier = fabs(Subtract)*1.57079633;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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bridgerectifier = 1-cos(bridgerectifier);
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if (Subtract > 0) Subtract = bridgerectifier;
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if (Subtract < 0) Subtract = -bridgerectifier;
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inputSample -= Subtract;
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//Soften works using the MidRoller stuff, defining a bright parallel channel that we apply negative Density
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//to, and then subtract from the main audio. That makes the 'highs channel subtract' hit only the loudest
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//transients, plus we are subtracting any artifacts we got from the negative Density.
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bridgerectifier = fabs(inputSample);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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bridgerectifier = sin(bridgerectifier);
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if (inputSample > 0) inputSample = bridgerectifier;
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if (inputSample < 0) inputSample = -bridgerectifier;
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//drive section: the tape sound includes a very gentle saturation curve, which is always an attenuation.
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//we cut back on highs before hitting this, and then we're going to subtract highs a second time after.
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HeadBump = iirHeadBumpA + iirHeadBumpB + iirHeadBumpC;
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//begin PhaseNudge
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allpasstemp = hcount - 1;
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if (allpasstemp < 0 || allpasstemp > maxdelay) {allpasstemp = maxdelay;}
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HeadBump -= e[allpasstemp] * fpOld;
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e[hcount] = HeadBump;
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inputSample *= fpOld;
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hcount--; if (hcount < 0 || hcount > maxdelay) {hcount = maxdelay;}
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HeadBump += (e[hcount]);
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//end PhaseNudge on head bump in lieu of delay.
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Subtract -= (HeadBump * (HeadBumpControl+iirMinHeadBump));
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//makes a second soften and a single head bump after saturation.
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//we are going to retain this, and then feed it into the highpass filter. That way, we can skip a subtract.
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//Head Bump retains a trace which is roughly as large as what the highpass will do.
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tempSample = inputSample;
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iirMinHeadBump = (iirMinHeadBump * altHBoostAmount) + (fabs(inputSample) * iirHBoostAmount);
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if (iirMinHeadBump > 0.01) iirMinHeadBump = 0.01;
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//we want this one rectified so that it's a relatively steady positive value. Boosts can cause it to be
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//greater than 1 so we clamp it in that case.
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iirSampleA = (iirSampleA * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleA; Subtract += iirSampleA;
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iirSampleB = (iirSampleB * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleB; Subtract += iirSampleB;
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iirSampleC = (iirSampleC * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleC; Subtract += iirSampleC;
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iirSampleD = (iirSampleD * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleD; Subtract += iirSampleD;
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iirSampleE = (iirSampleE * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleE; Subtract += iirSampleE;
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iirSampleF = (iirSampleF * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleF; Subtract += iirSampleF;
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iirSampleG = (iirSampleG * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleG; Subtract += iirSampleG;
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iirSampleH = (iirSampleH * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleH; Subtract += iirSampleH;
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iirSampleI = (iirSampleI * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleI; Subtract += iirSampleI;
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iirSampleJ = (iirSampleJ * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleJ; Subtract += iirSampleJ;
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iirSampleK = (iirSampleK * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleK; Subtract += iirSampleK;
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iirSampleL = (iirSampleL * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleL; Subtract += iirSampleL;
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iirSampleM = (iirSampleM * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleM; Subtract += iirSampleM;
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iirSampleN = (iirSampleN * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleN; Subtract += iirSampleN;
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iirSampleO = (iirSampleO * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleO; Subtract += iirSampleO;
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iirSampleP = (iirSampleP * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleP; Subtract += iirSampleP;
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iirSampleQ = (iirSampleQ * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleQ; Subtract += iirSampleQ;
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iirSampleR = (iirSampleR * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleR; Subtract += iirSampleR;
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iirSampleS = (iirSampleS * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleS; Subtract += iirSampleS;
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iirSampleT = (iirSampleT * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleT; Subtract += iirSampleT;
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iirSampleU = (iirSampleU * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleU; Subtract += iirSampleU;
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iirSampleV = (iirSampleV * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleV; Subtract += iirSampleV;
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iirSampleW = (iirSampleW * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleW; Subtract += iirSampleW;
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iirSampleX = (iirSampleX * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleX; Subtract += iirSampleX;
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iirSampleY = (iirSampleY * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleY; Subtract += iirSampleY;
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iirSampleZ = (iirSampleZ * altAmount) + (tempSample * iirAmount); tempSample -= iirSampleZ; Subtract += iirSampleZ;
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//do the IIR on a dummy sample, and store up the correction in a variable at the same scale as the very low level
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//numbers being used. Don't keep doing it against the possibly high level signal number.
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//This has been known to add a resonant quality to the cutoff, which we're using on purpose.
|
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inputSample -= Subtract;
|
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//apply stored up tiny corrections.
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|
|
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if (outputgain != 1.0) {
|
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inputSample *= outputgain;
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}
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|
|
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if (wet !=1.0) {
|
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inputSample = (inputSample * wet) + (drySample * (1.0-wet));
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}
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|
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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;
|
|
|
|
sourceP += inNumChannels; destP += inNumChannels;
|
|
}
|
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}
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