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airwindows/plugins/MacAU/CrunchyGrooveWear/CrunchyGrooveWear.cpp
Chris Johnson 966f2d253c Floating Point Dither For All
2019-01-27 21:13:54 -05:00

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/*
* File: CrunchyGrooveWear.cpp
*
* Version: 1.0
*
* Created: 3/4/18
*
* Copyright: Copyright © 2018 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.
*
*/
/*=============================================================================
CrunchyGrooveWear.cpp
=============================================================================*/
#include "CrunchyGrooveWear.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(CrunchyGrooveWear)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CrunchyGrooveWear::CrunchyGrooveWear
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CrunchyGrooveWear::CrunchyGrooveWear(AudioUnit component)
: AUEffectBase(component)
{
CreateElements();
Globals()->UseIndexedParameters(kNumberOfParameters);
SetParameter(kParam_One, kDefaultValue_ParamOne );
SetParameter(kParam_Two, kDefaultValue_ParamTwo );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CrunchyGrooveWear::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult CrunchyGrooveWear::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CrunchyGrooveWear::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult CrunchyGrooveWear::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;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CrunchyGrooveWear::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult CrunchyGrooveWear::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CrunchyGrooveWear::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult CrunchyGrooveWear::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// CrunchyGrooveWear::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult CrunchyGrooveWear::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____CrunchyGrooveWearEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CrunchyGrooveWear::CrunchyGrooveWearKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void CrunchyGrooveWear::CrunchyGrooveWearKernel::Reset()
{
for(int count = 0; count < 21; count++) {
aMid[count] = 0.0;
bMid[count] = 0.0;
cMid[count] = 0.0;
dMid[count] = 0.0;
fMid[count] = 0.0;
}
aMidPrev = 0.0;
bMidPrev = 0.0;
cMidPrev = 0.0;
dMidPrev = 0.0;
fpNShape = 0.0;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CrunchyGrooveWear::CrunchyGrooveWearKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void CrunchyGrooveWear::CrunchyGrooveWearKernel::Process( const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence )
{
UInt32 nSampleFrames = inFramesToProcess;
const Float32 *sourceP = inSourceP;
Float32 *destP = inDestP;
Float64 overallscale = (pow(GetParameter( kParam_One ),2)*19.0)+1.0;
Float64 gain = overallscale;
//mid groove wear
if (gain > 1.0) {fMid[0] = 1.0; gain -= 1.0;} else {fMid[0] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[1] = 1.0; gain -= 1.0;} else {fMid[1] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[2] = 1.0; gain -= 1.0;} else {fMid[2] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[3] = 1.0; gain -= 1.0;} else {fMid[3] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[4] = 1.0; gain -= 1.0;} else {fMid[4] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[5] = 1.0; gain -= 1.0;} else {fMid[5] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[6] = 1.0; gain -= 1.0;} else {fMid[6] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[7] = 1.0; gain -= 1.0;} else {fMid[7] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[8] = 1.0; gain -= 1.0;} else {fMid[8] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[9] = 1.0; gain -= 1.0;} else {fMid[9] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[10] = 1.0; gain -= 1.0;} else {fMid[10] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[11] = 1.0; gain -= 1.0;} else {fMid[11] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[12] = 1.0; gain -= 1.0;} else {fMid[12] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[13] = 1.0; gain -= 1.0;} else {fMid[13] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[14] = 1.0; gain -= 1.0;} else {fMid[14] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[15] = 1.0; gain -= 1.0;} else {fMid[15] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[16] = 1.0; gain -= 1.0;} else {fMid[16] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[17] = 1.0; gain -= 1.0;} else {fMid[17] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[18] = 1.0; gain -= 1.0;} else {fMid[18] = gain; gain = 0.0;}
if (gain > 1.0) {fMid[19] = 1.0; gain -= 1.0;} else {fMid[19] = gain; gain = 0.0;}
//there, now we have a neat little moving average with remainders
if (overallscale < 1.0) overallscale = 1.0;
fMid[0] /= overallscale;
fMid[1] /= overallscale;
fMid[2] /= overallscale;
fMid[3] /= overallscale;
fMid[4] /= overallscale;
fMid[5] /= overallscale;
fMid[6] /= overallscale;
fMid[7] /= overallscale;
fMid[8] /= overallscale;
fMid[9] /= overallscale;
fMid[10] /= overallscale;
fMid[11] /= overallscale;
fMid[12] /= overallscale;
fMid[13] /= overallscale;
fMid[14] /= overallscale;
fMid[15] /= overallscale;
fMid[16] /= overallscale;
fMid[17] /= overallscale;
fMid[18] /= overallscale;
fMid[19] /= overallscale;
//and now it's neatly scaled, too
Float64 aWet = 1.0;
Float64 bWet = 1.0;
Float64 cWet = 1.0;
Float64 dWet = GetParameter( kParam_Two )*4.0;
//four-stage wet/dry control using progressive stages that bypass when not engaged
if (dWet < 1.0) {aWet = dWet; bWet = 0.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 2.0) {bWet = dWet - 1.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 3.0) {cWet = dWet - 2.0; dWet = 0.0;}
else {dWet -= 3.0;}
//this is one way to make a little set of dry/wet stages that are successively added to the
//output as the control is turned up. Each one independently goes from 0-1 and stays at 1
//beyond that point: this is a way to progressively add a 'black box' sound processing
//which lets you fall through to simpler processing at lower settings.
//now we set them up so each full intensity one is blended evenly with dry for each stage.
//That's because the GrooveWear algorithm works best combined with dry.
//aWet *= 0.5;
//bWet *= 0.5; This was the tweak which caused GrooveWear to be dark instead of distorty
//cWet *= 0.5; Disabling this causes engaged stages to take on an edge, but 0.5 settings
//dWet *= 0.5; for any stage will still produce a darker tone.
// This will make the behavior of the plugin more complex
//if you are using a more typical algorithm (like a sin() or something) you won't use this part
Float64 aDry = 1.0 - aWet;
Float64 bDry = 1.0 - bWet;
Float64 cDry = 1.0 - cWet;
Float64 dDry = 1.0 - dWet;
Float64 drySample;
long double inputSample;
Float64 accumulatorSample;
Float64 correction;
while (nSampleFrames-- > 0) {
inputSample = *sourceP;
if (inputSample<1.2e-38 && -inputSample<1.2e-38) {
static int noisesource = 0;
//this declares a variable before anything else is compiled. It won't keep assigning
//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
//but it lets me add this denormalization fix in a single place rather than updating
//it in three different locations. The variable isn't thread-safe but this is only
//a random seed and we can share it with whatever.
noisesource = noisesource % 1700021; noisesource++;
int residue = noisesource * noisesource;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSample = applyresidue;
//this denormalization routine produces a white noise at -300 dB which the noise
//shaping will interact with to produce a bipolar output, but the noise is actually
//all positive. That should stop any variables from going denormal, and the routine
//only kicks in if digital black is input. As a final touch, if you save to 24-bit
//the silence will return to being digital black again.
}
drySample = inputSample;
if (aWet > 0.0) {
aMid[19] = aMid[18]; aMid[18] = aMid[17]; aMid[17] = aMid[16]; aMid[16] = aMid[15];
aMid[15] = aMid[14]; aMid[14] = aMid[13]; aMid[13] = aMid[12]; aMid[12] = aMid[11];
aMid[11] = aMid[10]; aMid[10] = aMid[9];
aMid[9] = aMid[8]; aMid[8] = aMid[7]; aMid[7] = aMid[6]; aMid[6] = aMid[5];
aMid[5] = aMid[4]; aMid[4] = aMid[3]; aMid[3] = aMid[2]; aMid[2] = aMid[1];
aMid[1] = aMid[0]; aMid[0] = accumulatorSample = (inputSample-aMidPrev);
//this is different from Aura because that is accumulating rates of change OF the rate of change
accumulatorSample *= fMid[0];
accumulatorSample += (aMid[1] * fMid[1]);
accumulatorSample += (aMid[2] * fMid[2]);
accumulatorSample += (aMid[3] * fMid[3]);
accumulatorSample += (aMid[4] * fMid[4]);
accumulatorSample += (aMid[5] * fMid[5]);
accumulatorSample += (aMid[6] * fMid[6]);
accumulatorSample += (aMid[7] * fMid[7]);
accumulatorSample += (aMid[8] * fMid[8]);
accumulatorSample += (aMid[9] * fMid[9]);
accumulatorSample += (aMid[10] * fMid[10]);
accumulatorSample += (aMid[11] * fMid[11]);
accumulatorSample += (aMid[12] * fMid[12]);
accumulatorSample += (aMid[13] * fMid[13]);
accumulatorSample += (aMid[14] * fMid[14]);
accumulatorSample += (aMid[15] * fMid[15]);
accumulatorSample += (aMid[16] * fMid[16]);
accumulatorSample += (aMid[17] * fMid[17]);
accumulatorSample += (aMid[18] * fMid[18]);
accumulatorSample += (aMid[19] * fMid[19]);
//we are doing our repetitive calculations on a separate value
correction = (inputSample-aMidPrev) - accumulatorSample;
aMidPrev = inputSample;
inputSample -= correction;
inputSample = (inputSample * aWet) + (drySample * aDry);
drySample = inputSample;
}
if (bWet > 0.0) {
bMid[19] = bMid[18]; bMid[18] = bMid[17]; bMid[17] = bMid[16]; bMid[16] = bMid[15];
bMid[15] = bMid[14]; bMid[14] = bMid[13]; bMid[13] = bMid[12]; bMid[12] = bMid[11];
bMid[11] = bMid[10]; bMid[10] = bMid[9];
bMid[9] = bMid[8]; bMid[8] = bMid[7]; bMid[7] = bMid[6]; bMid[6] = bMid[5];
bMid[5] = bMid[4]; bMid[4] = bMid[3]; bMid[3] = bMid[2]; bMid[2] = bMid[1];
bMid[1] = bMid[0]; bMid[0] = accumulatorSample = (inputSample-bMidPrev);
accumulatorSample *= fMid[0];
accumulatorSample += (bMid[1] * fMid[1]);
accumulatorSample += (bMid[2] * fMid[2]);
accumulatorSample += (bMid[3] * fMid[3]);
accumulatorSample += (bMid[4] * fMid[4]);
accumulatorSample += (bMid[5] * fMid[5]);
accumulatorSample += (bMid[6] * fMid[6]);
accumulatorSample += (bMid[7] * fMid[7]);
accumulatorSample += (bMid[8] * fMid[8]);
accumulatorSample += (bMid[9] * fMid[9]);
accumulatorSample += (bMid[10] * fMid[10]);
accumulatorSample += (bMid[11] * fMid[11]);
accumulatorSample += (bMid[12] * fMid[12]);
accumulatorSample += (bMid[13] * fMid[13]);
accumulatorSample += (bMid[14] * fMid[14]);
accumulatorSample += (bMid[15] * fMid[15]);
accumulatorSample += (bMid[16] * fMid[16]);
accumulatorSample += (bMid[17] * fMid[17]);
accumulatorSample += (bMid[18] * fMid[18]);
accumulatorSample += (bMid[19] * fMid[19]);
//we are doing our repetitive calculations on a separate value
correction = (inputSample-bMidPrev) - accumulatorSample;
bMidPrev = inputSample;
inputSample -= correction;
inputSample = (inputSample * bWet) + (drySample * bDry);
drySample = inputSample;
}
if (cWet > 0.0) {
cMid[19] = cMid[18]; cMid[18] = cMid[17]; cMid[17] = cMid[16]; cMid[16] = cMid[15];
cMid[15] = cMid[14]; cMid[14] = cMid[13]; cMid[13] = cMid[12]; cMid[12] = cMid[11];
cMid[11] = cMid[10]; cMid[10] = cMid[9];
cMid[9] = cMid[8]; cMid[8] = cMid[7]; cMid[7] = cMid[6]; cMid[6] = cMid[5];
cMid[5] = cMid[4]; cMid[4] = cMid[3]; cMid[3] = cMid[2]; cMid[2] = cMid[1];
cMid[1] = cMid[0]; cMid[0] = accumulatorSample = (inputSample-cMidPrev);
accumulatorSample *= fMid[0];
accumulatorSample += (cMid[1] * fMid[1]);
accumulatorSample += (cMid[2] * fMid[2]);
accumulatorSample += (cMid[3] * fMid[3]);
accumulatorSample += (cMid[4] * fMid[4]);
accumulatorSample += (cMid[5] * fMid[5]);
accumulatorSample += (cMid[6] * fMid[6]);
accumulatorSample += (cMid[7] * fMid[7]);
accumulatorSample += (cMid[8] * fMid[8]);
accumulatorSample += (cMid[9] * fMid[9]);
accumulatorSample += (cMid[10] * fMid[10]);
accumulatorSample += (cMid[11] * fMid[11]);
accumulatorSample += (cMid[12] * fMid[12]);
accumulatorSample += (cMid[13] * fMid[13]);
accumulatorSample += (cMid[14] * fMid[14]);
accumulatorSample += (cMid[15] * fMid[15]);
accumulatorSample += (cMid[16] * fMid[16]);
accumulatorSample += (cMid[17] * fMid[17]);
accumulatorSample += (cMid[18] * fMid[18]);
accumulatorSample += (cMid[19] * fMid[19]);
//we are doing our repetitive calculations on a separate value
correction = (inputSample-cMidPrev) - accumulatorSample;
cMidPrev = inputSample;
inputSample -= correction;
inputSample = (inputSample * cWet) + (drySample * cDry);
drySample = inputSample;
}
if (dWet > 0.0) {
dMid[19] = dMid[18]; dMid[18] = dMid[17]; dMid[17] = dMid[16]; dMid[16] = dMid[15];
dMid[15] = dMid[14]; dMid[14] = dMid[13]; dMid[13] = dMid[12]; dMid[12] = dMid[11];
dMid[11] = dMid[10]; dMid[10] = dMid[9];
dMid[9] = dMid[8]; dMid[8] = dMid[7]; dMid[7] = dMid[6]; dMid[6] = dMid[5];
dMid[5] = dMid[4]; dMid[4] = dMid[3]; dMid[3] = dMid[2]; dMid[2] = dMid[1];
dMid[1] = dMid[0]; dMid[0] = accumulatorSample = (inputSample-dMidPrev);
accumulatorSample *= fMid[0];
accumulatorSample += (dMid[1] * fMid[1]);
accumulatorSample += (dMid[2] * fMid[2]);
accumulatorSample += (dMid[3] * fMid[3]);
accumulatorSample += (dMid[4] * fMid[4]);
accumulatorSample += (dMid[5] * fMid[5]);
accumulatorSample += (dMid[6] * fMid[6]);
accumulatorSample += (dMid[7] * fMid[7]);
accumulatorSample += (dMid[8] * fMid[8]);
accumulatorSample += (dMid[9] * fMid[9]);
accumulatorSample += (dMid[10] * fMid[10]);
accumulatorSample += (dMid[11] * fMid[11]);
accumulatorSample += (dMid[12] * fMid[12]);
accumulatorSample += (dMid[13] * fMid[13]);
accumulatorSample += (dMid[14] * fMid[14]);
accumulatorSample += (dMid[15] * fMid[15]);
accumulatorSample += (dMid[16] * fMid[16]);
accumulatorSample += (dMid[17] * fMid[17]);
accumulatorSample += (dMid[18] * fMid[18]);
accumulatorSample += (dMid[19] * fMid[19]);
//we are doing our repetitive calculations on a separate value
correction = (inputSample-dMidPrev) - accumulatorSample;
dMidPrev = inputSample;
inputSample -= correction;
inputSample = (inputSample * dWet) + (drySample * dDry);
}
//32 bit dither, made small and tidy.
int expon; frexpf((Float32)inputSample, &expon);
long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
inputSample += (dither-fpNShape); fpNShape = dither;
//end 32 bit dither
*destP = inputSample;
sourceP += inNumChannels; destP += inNumChannels;
}
}
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