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371 lines
16 KiB
C++
Executable file
371 lines
16 KiB
C++
Executable file
/*
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* File: BiquadStereo.cpp
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*
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* Version: 1.0
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*
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* Created: 6/29/19
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*
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* Copyright: Copyright © 2019 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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BiquadStereo.cpp
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=============================================================================*/
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#include "BiquadStereo.h"
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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COMPONENT_ENTRY(BiquadStereo)
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// BiquadStereo::BiquadStereo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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BiquadStereo::BiquadStereo(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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// BiquadStereo::GetParameterValueStrings
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult BiquadStereo::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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// BiquadStereo::GetParameterInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult BiquadStereo::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_Indexed;
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outParameterInfo.minValue = 1.0;
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outParameterInfo.maxValue = 4.0;
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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.flags |= kAudioUnitParameterFlag_DisplayLogarithmic;
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outParameterInfo.minValue = 0.0001;
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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.flags |= kAudioUnitParameterFlag_DisplayLogarithmic;
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outParameterInfo.minValue = 0.01;
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outParameterInfo.maxValue = 30.0;
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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 = -1.0;
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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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// BiquadStereo::GetPropertyInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult BiquadStereo::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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// state that plugin supports only stereo-in/stereo-out processing
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UInt32 BiquadStereo::SupportedNumChannels(const AUChannelInfo ** outInfo)
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{
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if (outInfo != NULL)
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{
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static AUChannelInfo info;
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info.inChannels = 2;
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info.outChannels = 2;
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*outInfo = &info;
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}
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return 1;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// BiquadStereo::GetProperty
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult BiquadStereo::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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// BiquadStereo::Initialize
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult BiquadStereo::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 ____BiquadStereoEffectKernel
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// BiquadStereo::BiquadStereoKernel::Reset()
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult BiquadStereo::Reset(AudioUnitScope inScope, AudioUnitElement inElement)
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{
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for (int x = 0; x < 11; x++) {biquad[x] = 0.0;}
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fpdL = 1.0; while (fpdL < 16386) fpdL = rand()*UINT32_MAX;
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fpdR = 1.0; while (fpdR < 16386) fpdR = rand()*UINT32_MAX;
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return noErr;
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}
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// BiquadStereo::ProcessBufferLists
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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OSStatus BiquadStereo::ProcessBufferLists(AudioUnitRenderActionFlags & ioActionFlags,
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const AudioBufferList & inBuffer,
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AudioBufferList & outBuffer,
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UInt32 inFramesToProcess)
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{
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Float32 * inputL = (Float32*)(inBuffer.mBuffers[0].mData);
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Float32 * inputR = (Float32*)(inBuffer.mBuffers[1].mData);
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Float32 * outputL = (Float32*)(outBuffer.mBuffers[0].mData);
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Float32 * outputR = (Float32*)(outBuffer.mBuffers[1].mData);
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UInt32 nSampleFrames = inFramesToProcess;
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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 type = GetParameter( kParam_One);
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biquad[0] = GetParameter( kParam_Two )*0.499;
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if (biquad[0] < 0.0001) biquad[0] = 0.0001;
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biquad[1] = GetParameter( kParam_Three );
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if (biquad[1] < 0.0001) biquad[1] = 0.0001;
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Float64 wet = GetParameter( kParam_Four );
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//biquad contains these values:
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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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//[2] is a0 but you need distinct ones for additional biquad instances so it's here
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//[3] is a1 but you need distinct ones for additional biquad instances so it's here
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//[4] is a2 but you need distinct ones for additional biquad instances so it's here
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//[5] is b1 but you need distinct ones for additional biquad instances so it's here
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//[6] is b2 but you need distinct ones for additional biquad instances so it's here
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//[7] is LEFT stored delayed sample (freq and res are stored so you can move them sample by sample)
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//[8] is LEFT stored delayed sample (you have to include the coefficient making code if you do that)
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//[9] is RIGHT stored delayed sample (freq and res are stored so you can move them sample by sample)
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//[10] is RIGHT stored delayed sample (you have to include the coefficient making code if you do that)
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//to build a dedicated filter, rename 'biquad' to whatever the new filter is, then
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//put this code either within the sample buffer (for smoothly modulating freq or res)
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//or in this 'read the controls' area (for letting you change freq and res with controls)
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//or in 'reset' if the freq and res are absolutely fixed (use GetSampleRate to define freq)
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if (type == 1) { //lowpass
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double K = tan(M_PI * biquad[0]);
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double norm = 1.0 / (1.0 + K / biquad[1] + K * K);
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biquad[2] = K * K * norm;
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biquad[3] = 2.0 * biquad[2];
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biquad[4] = biquad[2];
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biquad[5] = 2.0 * (K * K - 1.0) * norm;
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biquad[6] = (1.0 - K / biquad[1] + K * K) * norm;
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}
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if (type == 2) { //highpass
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double K = tan(M_PI * biquad[0]);
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double norm = 1.0 / (1.0 + K / biquad[1] + K * K);
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biquad[2] = norm;
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biquad[3] = -2.0 * biquad[2];
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biquad[4] = biquad[2];
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biquad[5] = 2.0 * (K * K - 1.0) * norm;
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biquad[6] = (1.0 - K / biquad[1] + K * K) * norm;
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}
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if (type == 3) { //bandpass
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double K = tan(M_PI * biquad[0]);
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double norm = 1.0 / (1.0 + K / biquad[1] + K * K);
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biquad[2] = K / biquad[1] * norm;
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biquad[3] = 0.0; //bandpass can simplify the biquad kernel: leave out this multiply
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biquad[4] = -biquad[2];
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biquad[5] = 2.0 * (K * K - 1.0) * norm;
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biquad[6] = (1.0 - K / biquad[1] + K * K) * norm;
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}
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if (type == 4) { //notch
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double K = tan(M_PI * biquad[0]);
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double norm = 1.0 / (1.0 + K / biquad[1] + K * K);
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biquad[2] = (1.0 + K * K) * norm;
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biquad[3] = 2.0 * (K * K - 1) * norm;
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biquad[4] = biquad[2];
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biquad[5] = biquad[3];
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biquad[6] = (1.0 - K / biquad[1] + K * K) * norm;
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}
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while (nSampleFrames-- > 0) {
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double inputSampleL = *inputL;
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double inputSampleR = *inputR;
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if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
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if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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inputSampleL = sin(inputSampleL);
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inputSampleR = sin(inputSampleR);
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//encode Console5: good cleanness
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/*
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double mid = inputSampleL + inputSampleR;
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double side = inputSampleL - inputSampleR;
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//assign mid and side.Between these sections, you can do mid/side processing
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double tempSampleM = (mid * biquad[2]) + biquad[7];
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biquad[7] = (mid * biquad[3]) - (tempSampleM * biquad[5]) + biquad[8];
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biquad[8] = (mid * biquad[4]) - (tempSampleM * biquad[6]);
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mid = tempSampleM; //like mono AU, 7 and 8 store mid channel
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double tempSampleS = (side * biquad[2]) + biquad[9];
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biquad[9] = (side * biquad[3]) - (tempSampleS * biquad[5]) + biquad[10];
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biquad[10] = (side * biquad[4]) - (tempSampleS * biquad[6]);
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inputSampleR = tempSampleS; //note: 9 and 10 store the side channel
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inputSampleL = (mid+side)/2.0;
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inputSampleR = (mid-side)/2.0;
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//unassign mid and side
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*/
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double tempSampleL = (inputSampleL * biquad[2]) + biquad[7];
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biquad[7] = (inputSampleL * biquad[3]) - (tempSampleL * biquad[5]) + biquad[8];
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biquad[8] = (inputSampleL * biquad[4]) - (tempSampleL * biquad[6]);
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inputSampleL = tempSampleL; //like mono AU, 7 and 8 store L channel
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double tempSampleR = (inputSampleR * biquad[2]) + biquad[9];
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biquad[9] = (inputSampleR * biquad[3]) - (tempSampleR * biquad[5]) + biquad[10];
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biquad[10] = (inputSampleR * biquad[4]) - (tempSampleR * biquad[6]);
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inputSampleR = tempSampleR; //note: 9 and 10 store the R channel
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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//without this, you can get a NaN condition where it spits out DC offset at full blast!
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inputSampleL = asin(inputSampleL);
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inputSampleR = asin(inputSampleR);
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//amplitude aspect
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if (wet < 1.0) {
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inputSampleL = (inputSampleL*wet) + (drySampleL*(1.0-fabs(wet)));
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inputSampleR = (inputSampleR*wet) + (drySampleR*(1.0-fabs(wet)));
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//inv/dry/wet lets us turn LP into HP and band into notch
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}
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//begin 32 bit stereo floating point dither
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int expon; frexpf((float)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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frexpf((float)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 32 bit stereo floating point dither
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*outputL = inputSampleL;
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*outputR = inputSampleR;
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//direct stereo out
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inputL += 1;
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inputR += 1;
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outputL += 1;
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outputR += 1;
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}
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return noErr;
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}
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