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376 lines
16 KiB
C++
376 lines
16 KiB
C++
/*
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* File: BrightAmbience3.cpp
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*
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* Version: 1.0
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*
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* Created: 7/12/21
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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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BrightAmbience3.cpp
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=============================================================================*/
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#include "BrightAmbience3.h"
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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COMPONENT_ENTRY(BrightAmbience3)
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// BrightAmbience3::BrightAmbience3
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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BrightAmbience3::BrightAmbience3(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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// BrightAmbience3::GetParameterValueStrings
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult BrightAmbience3::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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// BrightAmbience3::GetParameterInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult BrightAmbience3::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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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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// BrightAmbience3::GetPropertyInfo
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult BrightAmbience3::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 BrightAmbience3::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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// BrightAmbience3::GetProperty
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult BrightAmbience3::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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// BrightAmbience3::Initialize
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult BrightAmbience3::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 ____BrightAmbience3EffectKernel
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// BrightAmbience3::BrightAmbience3Kernel::Reset()
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ComponentResult BrightAmbience3::Reset(AudioUnitScope inScope, AudioUnitElement inElement)
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{
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for(int count = 0; count < 32767; count++) {pL[count] = 0.0; pR[count] = 0.0;}
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feedbackA = feedbackB = 0.0;
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for (int x = 0; x < 9; x++) {figureL[x] = 0.0; figureR[x] = 0.0;}
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for (int c = 0; c < 9; c++) {lastRefL[c] = 0.0;lastRefR[c] = 0.0;}
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cycle = 0;
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gcount = 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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// BrightAmbience3::ProcessBufferLists
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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OSStatus BrightAmbience3::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 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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int start = (int)(GetParameter( kParam_One ) * 400)+88;
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int length = (int)(pow(GetParameter( kParam_Two ),2) * 487)+1;
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if (start + length > 488) start = 488-length;
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Float64 feedbackAmount = GetParameter( kParam_Three )*0.25;
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Float64 wet = GetParameter( kParam_Four );
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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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figureL[0] = figureR[0] = 1000.0/GetSampleRate(); //fixed frequency, 3.515775k
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figureL[1] = figureR[1] = pow(length*0.037*feedbackAmount,2)+0.01; //resonance
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double K = tan(M_PI * figureR[0]);
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double norm = 1.0 / (1.0 + K / figureR[1] + K * K);
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figureL[2] = figureR[2] = K / figureR[1] * norm;
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figureL[4] = figureR[4] = -figureR[2];
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figureL[5] = figureR[5] = 2.0 * (K * K - 1.0) * norm;
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figureL[6] = figureR[6] = (1.0 - K / figureR[1] + K * K) * norm;
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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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cycle++;
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if (cycle == cycleEnd) { //hit the end point and we do an Air sample
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double tempL = 0.0;
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double tempR = 0.0;
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if (gcount < 0 || gcount > 32767) gcount = 32767; int count = gcount;
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pL[count] = inputSampleL + feedbackB;
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pR[count] = inputSampleR + feedbackA;
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for(int offset = start; offset < start+length; offset++) {
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tempL += pL[count+primeL[offset] - ((count+primeL[offset] > 32767)?32768:0)];
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tempR += pR[count+primeR[offset] - ((count+primeR[offset] > 32767)?32768:0)];
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}
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inputSampleL = tempL/cbrt(length);
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inputSampleR = tempR/cbrt(length);
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double tempSample = (inputSampleL * figureL[2]) + figureL[7];
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figureL[7] = -(tempSample * figureL[5]) + figureL[8];
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figureL[8] = (inputSampleL * figureL[4]) - (tempSample * figureL[6]);
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feedbackA = sin(tempSample) * feedbackAmount;
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tempSample = (inputSampleR * figureR[2]) + figureR[7];
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figureR[7] = -(tempSample * figureR[5]) + figureR[8];
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figureR[8] = (inputSampleR * figureR[4]) - (tempSample * figureR[6]);
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feedbackB = sin(tempSample) * feedbackAmount;
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gcount--;
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if (cycleEnd == 4) {
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lastRefL[0] = lastRefL[4]; //start from previous last
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lastRefL[2] = (lastRefL[0] + inputSampleL)/2; //half
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lastRefL[1] = (lastRefL[0] + lastRefL[2])/2; //one quarter
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lastRefL[3] = (lastRefL[2] + inputSampleL)/2; //three quarters
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lastRefL[4] = inputSampleL; //full
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lastRefR[0] = lastRefR[4]; //start from previous last
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lastRefR[2] = (lastRefR[0] + inputSampleR)/2; //half
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lastRefR[1] = (lastRefR[0] + lastRefR[2])/2; //one quarter
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lastRefR[3] = (lastRefR[2] + inputSampleR)/2; //three quarters
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lastRefR[4] = inputSampleR; //full
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}
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if (cycleEnd == 3) {
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lastRefL[0] = lastRefL[3]; //start from previous last
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lastRefL[2] = (lastRefL[0]+lastRefL[0]+inputSampleL)/3; //third
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lastRefL[1] = (lastRefL[0]+inputSampleL+inputSampleL)/3; //two thirds
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lastRefL[3] = inputSampleL; //full
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lastRefR[0] = lastRefR[3]; //start from previous last
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lastRefR[2] = (lastRefR[0]+lastRefR[0]+inputSampleR)/3; //third
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lastRefR[1] = (lastRefR[0]+inputSampleR+inputSampleR)/3; //two thirds
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lastRefR[3] = inputSampleR; //full
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}
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if (cycleEnd == 2) {
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lastRefL[0] = lastRefL[2]; //start from previous last
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lastRefL[1] = (lastRefL[0] + inputSampleL)/2; //half
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lastRefL[2] = inputSampleL; //full
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lastRefR[0] = lastRefR[2]; //start from previous last
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lastRefR[1] = (lastRefR[0] + inputSampleR)/2; //half
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lastRefR[2] = inputSampleR; //full
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}
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if (cycleEnd == 1) {
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lastRefL[0] = inputSampleL;
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lastRefR[0] = inputSampleR;
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}
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cycle = 0; //reset
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inputSampleL = lastRefL[cycle];
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inputSampleR = lastRefR[cycle];
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} else {
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inputSampleL = lastRefL[cycle];
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inputSampleR = lastRefR[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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lastRefL[8] = inputSampleL; inputSampleL = (inputSampleL+lastRefL[7])*0.5;
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lastRefL[7] = lastRefL[8]; //continue, do not break
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lastRefR[8] = inputSampleR; inputSampleR = (inputSampleR+lastRefR[7])*0.5;
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lastRefR[7] = lastRefR[8]; //continue, do not break
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case 3:
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lastRefL[8] = inputSampleL; inputSampleL = (inputSampleL+lastRefL[6])*0.5;
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lastRefL[6] = lastRefL[8]; //continue, do not break
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lastRefR[8] = inputSampleR; inputSampleR = (inputSampleR+lastRefR[6])*0.5;
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lastRefR[6] = lastRefR[8]; //continue, do not break
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case 2:
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lastRefL[8] = inputSampleL; inputSampleL = (inputSampleL+lastRefL[5])*0.5;
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lastRefL[5] = lastRefL[8]; //continue, do not break
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lastRefR[8] = inputSampleR; inputSampleR = (inputSampleR+lastRefR[5])*0.5;
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lastRefR[5] = lastRefR[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) {
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inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
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inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
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}
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//Dry/Wet control, defaults to the last slider
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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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