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+/*
+* File: Vibrato.cpp
+*
+* Version: 1.0
+*
+* Created: 6/20/19
+*
+* Copyright: Copyright © 2019 Airwindows, All Rights Reserved
+*
+* Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in
+* consideration of your agreement to the following terms, and your use, installation, modification
+* or redistribution of this Apple software constitutes acceptance of these terms. If you do
+* not agree with these terms, please do not use, install, modify or redistribute this Apple
+* software.
+*
+* In consideration of your agreement to abide by the following terms, and subject to these terms,
+* Apple grants you a personal, non-exclusive license, under Apple's copyrights in this
+* original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the
+* Apple Software, with or without modifications, in source and/or binary forms; provided that if you
+* redistribute the Apple Software in its entirety and without modifications, you must retain this
+* notice and the following text and disclaimers in all such redistributions of the Apple Software.
+* Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to
+* endorse or promote products derived from the Apple Software without specific prior written
+* permission from Apple. Except as expressly stated in this notice, no other rights or
+* licenses, express or implied, are granted by Apple herein, including but not limited to any
+* patent rights that may be infringed by your derivative works or by other works in which the
+* Apple Software may be incorporated.
+*
+* The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR
+* IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY
+* AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE
+* OR IN COMBINATION WITH YOUR PRODUCTS.
+*
+* IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
+* REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER
+* UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN
+* IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+*/
+/*=============================================================================
+ Vibrato.cpp
+
+=============================================================================*/
+#include "Vibrato.h"
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+COMPONENT_ENTRY(Vibrato)
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// Vibrato::Vibrato
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Vibrato::Vibrato(AudioUnit component)
+ : AUEffectBase(component)
+{
+ CreateElements();
+ Globals()->UseIndexedParameters(kNumberOfParameters);
+ SetParameter(kParam_One, kDefaultValue_ParamOne );
+ SetParameter(kParam_Two, kDefaultValue_ParamTwo );
+ SetParameter(kParam_Three, kDefaultValue_ParamThree );
+ SetParameter(kParam_Four, kDefaultValue_ParamFour );
+ SetParameter(kParam_Five, kDefaultValue_ParamFive );
+
+#if AU_DEBUG_DISPATCHER
+ mDebugDispatcher = new AUDebugDispatcher (this);
+#endif
+
+}
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// Vibrato::GetParameterValueStrings
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult Vibrato::GetParameterValueStrings(AudioUnitScope inScope,
+ AudioUnitParameterID inParameterID,
+ CFArrayRef * outStrings)
+{
+
+ return kAudioUnitErr_InvalidProperty;
+}
+
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// Vibrato::GetParameterInfo
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult Vibrato::GetParameterInfo(AudioUnitScope inScope,
+ AudioUnitParameterID inParameterID,
+ AudioUnitParameterInfo &outParameterInfo )
+{
+ ComponentResult result = noErr;
+
+ outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
+ | kAudioUnitParameterFlag_IsReadable;
+
+ if (inScope == kAudioUnitScope_Global) {
+ switch(inParameterID)
+ {
+ case kParam_One:
+ AUBase::FillInParameterName (outParameterInfo, kParameterOneName, false);
+ outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
+ outParameterInfo.minValue = 0.0;
+ outParameterInfo.maxValue = 1.0;
+ outParameterInfo.defaultValue = kDefaultValue_ParamOne;
+ break;
+ case kParam_Two:
+ AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false);
+ outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
+ outParameterInfo.minValue = 0.0;
+ outParameterInfo.maxValue = 1.0;
+ outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
+ break;
+ case kParam_Three:
+ AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false);
+ outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
+ outParameterInfo.minValue = 0.0;
+ outParameterInfo.maxValue = 1.0;
+ outParameterInfo.defaultValue = kDefaultValue_ParamThree;
+ break;
+ case kParam_Four:
+ AUBase::FillInParameterName (outParameterInfo, kParameterFourName, false);
+ outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
+ outParameterInfo.minValue = 0.0;
+ outParameterInfo.maxValue = 1.0;
+ outParameterInfo.defaultValue = kDefaultValue_ParamFour;
+ break;
+ case kParam_Five:
+ AUBase::FillInParameterName (outParameterInfo, kParameterFiveName, false);
+ outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
+ outParameterInfo.minValue = -1.0;
+ outParameterInfo.maxValue = 1.0;
+ outParameterInfo.defaultValue = kDefaultValue_ParamFive;
+ break;
+ default:
+ result = kAudioUnitErr_InvalidParameter;
+ break;
+ }
+ } else {
+ result = kAudioUnitErr_InvalidParameter;
+ }
+
+
+
+ return result;
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// Vibrato::GetPropertyInfo
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult Vibrato::GetPropertyInfo (AudioUnitPropertyID inID,
+ AudioUnitScope inScope,
+ AudioUnitElement inElement,
+ UInt32 & outDataSize,
+ Boolean & outWritable)
+{
+ return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// Vibrato::GetProperty
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult Vibrato::GetProperty( AudioUnitPropertyID inID,
+ AudioUnitScope inScope,
+ AudioUnitElement inElement,
+ void * outData )
+{
+ return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
+}
+
+// Vibrato::Initialize
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ComponentResult Vibrato::Initialize()
+{
+ ComponentResult result = AUEffectBase::Initialize();
+ if (result == noErr)
+ Reset(kAudioUnitScope_Global, 0);
+ return result;
+}
+
+#pragma mark ____VibratoEffectKernel
+
+
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// Vibrato::VibratoKernel::Reset()
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+void Vibrato::VibratoKernel::Reset()
+{
+ for(int count = 0; count < 16385; count++) {p[count] = 0;}
+ sweep = 3.141592653589793238 / 2.0;
+ sweepB = 3.141592653589793238 / 2.0;
+ gcount = 0;
+ airPrev = 0.0;
+ airEven = 0.0;
+ airOdd = 0.0;
+ airFactor = 0.0;
+ flip = false;
+ fpd = 17;
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// Vibrato::VibratoKernel::Process
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+void Vibrato::VibratoKernel::Process( const Float32 *inSourceP,
+ Float32 *inDestP,
+ UInt32 inFramesToProcess,
+ UInt32 inNumChannels,
+ bool &ioSilence )
+{
+ UInt32 nSampleFrames = inFramesToProcess;
+ const Float32 *sourceP = inSourceP;
+ Float32 *destP = inDestP;
+ Float64 speed = pow(0.1+GetParameter( kParam_One ),6);
+ Float64 depth = (pow(GetParameter( kParam_Two ),3) / sqrt(speed))*4.0;
+ Float64 speedB = pow(0.1+GetParameter( kParam_Three ),6);
+ Float64 depthB = pow(GetParameter( kParam_Four ),3) / sqrt(speedB);
+ Float64 tupi = 3.141592653589793238 * 2.0;
+ Float64 wet = GetParameter( kParam_Five ); //note: inv/dry/wet
+
+ while (nSampleFrames-- > 0) {
+ long double inputSample = *sourceP;
+ if (fabs(inputSample)<1.18e-37) inputSample = fpd * 1.18e-37;
+ double drySample = inputSample;
+
+ airFactor = airPrev - inputSample;
+ if (flip) {airEven += airFactor; airOdd -= airFactor; airFactor = airEven;}
+ else {airOdd += airFactor; airEven -= airFactor; airFactor = airOdd;}
+ airOdd = (airOdd - ((airOdd - airEven)/256.0)) / 1.0001;
+ airEven = (airEven - ((airEven - airOdd)/256.0)) / 1.0001;
+ airPrev = inputSample;
+ inputSample += airFactor;
+ flip = !flip;
+ //air, compensates for loss of highs in the interpolation
+
+ if (gcount < 1 || gcount > 8192) {gcount = 8192;}
+ int count = gcount;
+ p[count+8192] = p[count] = inputSample;
+
+ Float64 offset = depth + (depth * sin(sweep));
+ count += (int)floor(offset);
+
+ inputSample = p[count] * (1-(offset-floor(offset))); //less as value moves away from .0
+ inputSample += p[count+1]; //we can assume always using this in one way or another?
+ inputSample += p[count+2] * (offset-floor(offset)); //greater as value moves away from .0
+ inputSample -= ((p[count]-p[count+1])-(p[count+1]-p[count+2]))/50; //interpolation hacks 'r us
+ inputSample *= 0.5; // gain trim
+
+ sweep += (speed + (speedB * sin(sweepB) * depthB));
+ sweepB += speedB;
+ if (sweep > tupi){sweep -= tupi;}
+ if (sweep < 0.0){sweep += tupi;} //through zero FM
+ if (sweepB > tupi){sweepB -= tupi;}
+ gcount--;
+ //still scrolling through the samples, remember
+
+ if (wet !=1.0) {
+ inputSample = (inputSample * wet) + (drySample * (1.0-fabs(wet)));
+ }
+ //Inv/Dry/Wet control
+
+ //begin 32 bit floating point dither
+ int expon; frexpf((float)inputSample, &expon);
+ fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
+ inputSample += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
+ //end 32 bit floating point dither
+
+ *destP = inputSample;
+
+ sourceP += inNumChannels; destP += inNumChannels;
+ }
+}
+