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airwindows/plugins/MacAU/VerbTiny/VerbTiny.cpp
Christopher Johnson 824cfc024d VerbThic
2025-11-28 16:15:14 -05:00

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/*
* File: VerbTiny.cpp
*
* Version: 1.0
*
* Created: 11/10/25
*
* Copyright: Copyright © 2025 Airwindows, Airwindows uses the MIT license
*
* 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.
*
*/
/*=============================================================================
VerbTiny.cpp
=============================================================================*/
#include "VerbTiny.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(VerbTiny)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VerbTiny::VerbTiny
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
VerbTiny::VerbTiny(AudioUnit component)
: AUEffectBase(component)
{
CreateElements();
Globals()->UseIndexedParameters(kNumberOfParameters);
SetParameter(kParam_A, kDefaultValue_ParamA );
SetParameter(kParam_B, kDefaultValue_ParamB );
SetParameter(kParam_C, kDefaultValue_ParamC );
SetParameter(kParam_D, kDefaultValue_ParamD );
SetParameter(kParam_E, kDefaultValue_ParamE );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VerbTiny::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult VerbTiny::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VerbTiny::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult VerbTiny::GetParameterInfo(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
AudioUnitParameterInfo &outParameterInfo )
{
ComponentResult result = noErr;
outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
| kAudioUnitParameterFlag_IsReadable;
if (inScope == kAudioUnitScope_Global) {
switch(inParameterID)
{
case kParam_A:
AUBase::FillInParameterName (outParameterInfo, kParameterAName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamA;
break;
case kParam_B:
AUBase::FillInParameterName (outParameterInfo, kParameterBName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamB;
break;
case kParam_C:
AUBase::FillInParameterName (outParameterInfo, kParameterCName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamC;
break;
case kParam_D:
AUBase::FillInParameterName (outParameterInfo, kParameterDName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamD;
break;
case kParam_E:
AUBase::FillInParameterName (outParameterInfo, kParameterEName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamE;
break;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VerbTiny::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult VerbTiny::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// state that plugin supports only stereo-in/stereo-out processing
UInt32 VerbTiny::SupportedNumChannels(const AUChannelInfo ** outInfo)
{
if (outInfo != NULL)
{
static AUChannelInfo info;
info.inChannels = 2;
info.outChannels = 2;
*outInfo = &info;
}
return 1;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VerbTiny::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult VerbTiny::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// VerbTiny::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult VerbTiny::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____VerbTinyEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VerbTiny::VerbTinyKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult VerbTiny::Reset(AudioUnitScope inScope, AudioUnitElement inElement)
{
for(int x = 0; x < d4A+2; x++) {a4AL[x] = 0.0; a4AR[x] = 0.0;}
for(int x = 0; x < d4B+2; x++) {a4BL[x] = 0.0; a4BR[x] = 0.0;}
for(int x = 0; x < d4C+2; x++) {a4CL[x] = 0.0; a4CR[x] = 0.0;}
for(int x = 0; x < d4D+2; x++) {a4DL[x] = 0.0; a4DR[x] = 0.0;}
for(int x = 0; x < d4E+2; x++) {a4EL[x] = 0.0; a4ER[x] = 0.0;}
for(int x = 0; x < d4F+2; x++) {a4FL[x] = 0.0; a4FR[x] = 0.0;}
for(int x = 0; x < d4G+2; x++) {a4GL[x] = 0.0; a4GR[x] = 0.0;}
for(int x = 0; x < d4H+2; x++) {a4HL[x] = 0.0; a4HR[x] = 0.0;}
for(int x = 0; x < d4I+2; x++) {a4IL[x] = 0.0; a4IR[x] = 0.0;}
for(int x = 0; x < d4J+2; x++) {a4JL[x] = 0.0; a4JR[x] = 0.0;}
for(int x = 0; x < d4K+2; x++) {a4KL[x] = 0.0; a4KR[x] = 0.0;}
for(int x = 0; x < d4L+2; x++) {a4LL[x] = 0.0; a4LR[x] = 0.0;}
for(int x = 0; x < d4M+2; x++) {a4ML[x] = 0.0; a4MR[x] = 0.0;}
for(int x = 0; x < d4N+2; x++) {a4NL[x] = 0.0; a4NR[x] = 0.0;}
for(int x = 0; x < d4O+2; x++) {a4OL[x] = 0.0; a4OR[x] = 0.0;}
for(int x = 0; x < d4P+2; x++) {a4PL[x] = 0.0; a4PR[x] = 0.0;}
c4AL = c4BL = c4CL = c4DL = c4EL = c4FL = c4GL = c4HL = 1;
c4IL = c4JL = c4KL = c4LL = c4ML = c4NL = c4OL = c4PL = 1;
c4AR = c4BR = c4CR = c4DR = c4ER = c4FR = c4GR = c4HR = 1;
c4IR = c4JR = c4KR = c4LR = c4MR = c4NR = c4OR = c4PR = 1;
f4AL = f4BL = f4CL = f4DL = 0.0;
f4DR = f4HR = f4LR = f4PR = 0.0;
for(int x = 0; x < d4A+2; x++) {b4AL[x] = 0.0; b4AR[x] = 0.0;}
for(int x = 0; x < d4B+2; x++) {b4BL[x] = 0.0; b4BR[x] = 0.0;}
for(int x = 0; x < d4C+2; x++) {b4CL[x] = 0.0; b4CR[x] = 0.0;}
for(int x = 0; x < d4D+2; x++) {b4DL[x] = 0.0; b4DR[x] = 0.0;}
for(int x = 0; x < d4E+2; x++) {b4EL[x] = 0.0; b4ER[x] = 0.0;}
for(int x = 0; x < d4F+2; x++) {b4FL[x] = 0.0; b4FR[x] = 0.0;}
for(int x = 0; x < d4G+2; x++) {b4GL[x] = 0.0; b4GR[x] = 0.0;}
for(int x = 0; x < d4H+2; x++) {b4HL[x] = 0.0; b4HR[x] = 0.0;}
for(int x = 0; x < d4I+2; x++) {b4IL[x] = 0.0; b4IR[x] = 0.0;}
for(int x = 0; x < d4J+2; x++) {b4JL[x] = 0.0; b4JR[x] = 0.0;}
for(int x = 0; x < d4K+2; x++) {b4KL[x] = 0.0; b4KR[x] = 0.0;}
for(int x = 0; x < d4L+2; x++) {b4LL[x] = 0.0; b4LR[x] = 0.0;}
for(int x = 0; x < d4M+2; x++) {b4ML[x] = 0.0; b4MR[x] = 0.0;}
for(int x = 0; x < d4N+2; x++) {b4NL[x] = 0.0; b4NR[x] = 0.0;}
for(int x = 0; x < d4O+2; x++) {b4OL[x] = 0.0; b4OR[x] = 0.0;}
for(int x = 0; x < d4P+2; x++) {b4PL[x] = 0.0; b4PR[x] = 0.0;}
g4AL = g4BL = g4CL = g4DL = 0.0;
g4DR = g4HR = g4LR = g4PR = 0.0;
for (int x = 0; x < bez_total; x++) {
bez[x] = 0.0;
bezF[x] = 0.0;
}
bez[bez_cycle] = 1.0;
bezF[bez_cycle] = 1.0;
fpdL = 1.0; while (fpdL < 16386) fpdL = rand()*UINT32_MAX;
fpdR = 1.0; while (fpdR < 16386) fpdR = rand()*UINT32_MAX;
return noErr;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// VerbTiny::ProcessBufferLists
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
OSStatus VerbTiny::ProcessBufferLists(AudioUnitRenderActionFlags & ioActionFlags,
const AudioBufferList & inBuffer,
AudioBufferList & outBuffer,
UInt32 inFramesToProcess)
{
Float32 * inputL = (Float32*)(inBuffer.mBuffers[0].mData);
Float32 * inputR = (Float32*)(inBuffer.mBuffers[1].mData);
Float32 * outputL = (Float32*)(outBuffer.mBuffers[0].mData);
Float32 * outputR = (Float32*)(outBuffer.mBuffers[1].mData);
UInt32 nSampleFrames = inFramesToProcess;
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= GetSampleRate();
double reg4n = 0.03125+((1.0-pow(1.0-GetParameter( kParam_A ),2.0))*0.03125);
double attenuate = 1.0 - (1.0-pow(1.0-GetParameter( kParam_A ),2.0));
double derez = pow(GetParameter( kParam_B ),2.0);
derez = fmin(fmax(derez/overallscale,0.0001),1.0);
int bezFraction = (int)(1.0/derez);
double bezTrim = (double)bezFraction/(bezFraction+1.0);
derez = 1.0 / bezFraction;
bezTrim = 1.0-(derez*bezTrim);
//the revision more accurately connects the bezier curves
double derezFreq = pow(GetParameter( kParam_C ),2.0);
derezFreq = fmin(fmax(derezFreq/overallscale,0.0001),1.0);
int bezFreqFraction = (int)(1.0/derezFreq);
double bezFreqTrim = (double)bezFreqFraction/(bezFreqFraction+1.0);
derezFreq = 1.0 / bezFreqFraction;
bezFreqTrim = 1.0-(derezFreq*bezFreqTrim);
//the revision more accurately connects the bezier curves
double wider = GetParameter( kParam_D )*2.0;
double wet = GetParameter( kParam_E );
while (nSampleFrames-- > 0) {
double inputSampleL = *inputL;
double inputSampleR = *inputR;
if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
double drySampleL = inputSampleL;
double drySampleR = inputSampleR;
bez[bez_cycle] += derez;
bez[bez_SampL] += (inputSampleL*attenuate*derez);
bez[bez_SampR] += (inputSampleR*attenuate*derez);
if (bez[bez_cycle] > 1.0) { //hit the end point and we do a reverb sample
bez[bez_cycle] = 0.0;
double mainSampleL = bez[bez_SampL];
double dualmonoSampleL = bez[bez_SampR];
//workaround involves keeping the cross-matrix system,
//but for initial layering, each side gets each version
//making blends never quite line up as exactly the same.
//left verbs
a4AL[c4AL] = mainSampleL + (f4DR * reg4n);
a4BL[c4BL] = mainSampleL + (f4HR * reg4n);
a4CL[c4CL] = mainSampleL + (f4LR * reg4n);
a4DL[c4DL] = mainSampleL + (f4PR * reg4n);
b4AL[c4AL] = dualmonoSampleL + (g4AL * reg4n);
b4BL[c4BL] = dualmonoSampleL + (g4BL * reg4n);
b4CL[c4CL] = dualmonoSampleL + (g4CL * reg4n);
b4DL[c4DL] = dualmonoSampleL + (g4DL * reg4n);
c4AL++; if (c4AL < 0 || c4AL > d4A) c4AL = 0;
c4BL++; if (c4BL < 0 || c4BL > d4B) c4BL = 0;
c4CL++; if (c4CL < 0 || c4CL > d4C) c4CL = 0;
c4DL++; if (c4DL < 0 || c4DL > d4D) c4DL = 0;
double hA = a4AL[c4AL-((c4AL > d4A)?d4A+1:0)];
double hB = a4BL[c4BL-((c4BL > d4B)?d4B+1:0)];
double hC = a4CL[c4CL-((c4CL > d4C)?d4C+1:0)];
double hD = a4DL[c4DL-((c4DL > d4D)?d4D+1:0)];
a4EL[c4EL] = hA - (hB + hC + hD);
a4FL[c4FL] = hB - (hA + hC + hD);
a4GL[c4GL] = hC - (hA + hB + hD);
a4HL[c4HL] = hD - (hA + hB + hC);
hA = b4AL[c4AL-((c4AL > d4A)?d4A+1:0)];
hB = b4BL[c4BL-((c4BL > d4B)?d4B+1:0)];
hC = b4CL[c4CL-((c4CL > d4C)?d4C+1:0)];
hD = b4DL[c4DL-((c4DL > d4D)?d4D+1:0)];
b4EL[c4EL] = hA - (hB + hC + hD);
b4FL[c4FL] = hB - (hA + hC + hD);
b4GL[c4GL] = hC - (hA + hB + hD);
b4HL[c4HL] = hD - (hA + hB + hC);
c4EL++; if (c4EL < 0 || c4EL > d4E) c4EL = 0;
c4FL++; if (c4FL < 0 || c4FL > d4F) c4FL = 0;
c4GL++; if (c4GL < 0 || c4GL > d4G) c4GL = 0;
c4HL++; if (c4HL < 0 || c4HL > d4H) c4HL = 0;
hA = a4EL[c4EL-((c4EL > d4E)?d4E+1:0)];
hB = a4FL[c4FL-((c4FL > d4F)?d4F+1:0)];
hC = a4GL[c4GL-((c4GL > d4G)?d4G+1:0)];
hD = a4HL[c4HL-((c4HL > d4H)?d4H+1:0)];
a4IL[c4IL] = hA - (hB + hC + hD);
a4JL[c4JL] = hB - (hA + hC + hD);
a4KL[c4KL] = hC - (hA + hB + hD);
a4LL[c4LL] = hD - (hA + hB + hC);
hA = b4EL[c4EL-((c4EL > d4E)?d4E+1:0)];
hB = b4FL[c4FL-((c4FL > d4F)?d4F+1:0)];
hC = b4GL[c4GL-((c4GL > d4G)?d4G+1:0)];
hD = b4HL[c4HL-((c4HL > d4H)?d4H+1:0)];
b4IL[c4IL] = hA - (hB + hC + hD);
b4JL[c4JL] = hB - (hA + hC + hD);
b4KL[c4KL] = hC - (hA + hB + hD);
b4LL[c4LL] = hD - (hA + hB + hC);
c4IL++; if (c4IL < 0 || c4IL > d4I) c4IL = 0;
c4JL++; if (c4JL < 0 || c4JL > d4J) c4JL = 0;
c4KL++; if (c4KL < 0 || c4KL > d4K) c4KL = 0;
c4LL++; if (c4LL < 0 || c4LL > d4L) c4LL = 0;
hA = a4IL[c4IL-((c4IL > d4I)?d4I+1:0)];
hB = a4JL[c4JL-((c4JL > d4J)?d4J+1:0)];
hC = a4KL[c4KL-((c4KL > d4K)?d4K+1:0)];
hD = a4LL[c4LL-((c4LL > d4L)?d4L+1:0)];
a4ML[c4ML] = hA - (hB + hC + hD);
a4NL[c4NL] = hB - (hA + hC + hD);
a4OL[c4OL] = hC - (hA + hB + hD);
a4PL[c4PL] = hD - (hA + hB + hC);
hA = b4IL[c4IL-((c4IL > d4I)?d4I+1:0)];
hB = b4JL[c4JL-((c4JL > d4J)?d4J+1:0)];
hC = b4KL[c4KL-((c4KL > d4K)?d4K+1:0)];
hD = b4LL[c4LL-((c4LL > d4L)?d4L+1:0)];
b4ML[c4ML] = hA - (hB + hC + hD);
b4NL[c4NL] = hB - (hA + hC + hD);
b4OL[c4OL] = hC - (hA + hB + hD);
b4PL[c4PL] = hD - (hA + hB + hC);
c4ML++; if (c4ML < 0 || c4ML > d4M) c4ML = 0;
c4NL++; if (c4NL < 0 || c4NL > d4N) c4NL = 0;
c4OL++; if (c4OL < 0 || c4OL > d4O) c4OL = 0;
c4PL++; if (c4PL < 0 || c4PL > d4P) c4PL = 0;
hA = a4ML[c4ML-((c4ML > d4M)?d4M+1:0)];
hB = a4NL[c4NL-((c4NL > d4N)?d4N+1:0)];
hC = a4OL[c4OL-((c4OL > d4O)?d4O+1:0)];
hD = a4PL[c4PL-((c4PL > d4P)?d4P+1:0)];
f4AL = hA - (hB + hC + hD);
f4BL = hB - (hA + hC + hD);
f4CL = hC - (hA + hB + hD);
f4DL = hD - (hA + hB + hC);//not actually crosschannel yet
mainSampleL = (hA + hB + hC + hD)*0.125;
hA = b4ML[c4ML-((c4ML > d4M)?d4M+1:0)];
hB = b4NL[c4NL-((c4NL > d4N)?d4N+1:0)];
hC = b4OL[c4OL-((c4OL > d4O)?d4O+1:0)];
hD = b4PL[c4PL-((c4PL > d4P)?d4P+1:0)];
g4AL = hA - (hB + hC + hD);
g4BL = hB - (hA + hC + hD);
g4CL = hC - (hA + hB + hD);
g4DL = hD - (hA + hB + hC);
dualmonoSampleL = (hA + hB + hC + hD)*0.125;
double mainSampleR = bez[bez_SampR]; //begin primary reverb
double dualmonoSampleR = bez[bez_SampL];
//right verbs
a4DR[c4DR] = mainSampleR + (f4AL * reg4n);
a4HR[c4HR] = mainSampleR + (f4BL * reg4n);
a4LR[c4LR] = mainSampleR + (f4CL * reg4n);
a4PR[c4PR] = mainSampleR + (f4DL * reg4n);
b4DR[c4DR] = dualmonoSampleR + (g4DR * reg4n);
b4HR[c4HR] = dualmonoSampleR + (g4HR * reg4n);
b4LR[c4LR] = dualmonoSampleR + (g4LR * reg4n);
b4PR[c4PR] = dualmonoSampleR + (g4PR * reg4n);
c4DR++; if (c4DR < 0 || c4DR > d4D) c4DR = 0;
c4HR++; if (c4HR < 0 || c4HR > d4H) c4HR = 0;
c4LR++; if (c4LR < 0 || c4LR > d4L) c4LR = 0;
c4PR++; if (c4PR < 0 || c4PR > d4P) c4PR = 0;
hA = a4DR[c4DR-((c4DR > d4D)?d4D+1:0)];
hB = a4HR[c4HR-((c4HR > d4H)?d4H+1:0)];
hC = a4LR[c4LR-((c4LR > d4L)?d4L+1:0)];
hD = a4PR[c4PR-((c4PR > d4P)?d4P+1:0)];
a4CR[c4CR] = hA - (hB + hC + hD);
a4GR[c4GR] = hB - (hA + hC + hD);
a4KR[c4KR] = hC - (hA + hB + hD);
a4OR[c4OR] = hD - (hA + hB + hC);
hA = b4DR[c4DR-((c4DR > d4D)?d4D+1:0)];
hB = b4HR[c4HR-((c4HR > d4H)?d4H+1:0)];
hC = b4LR[c4LR-((c4LR > d4L)?d4L+1:0)];
hD = b4PR[c4PR-((c4PR > d4P)?d4P+1:0)];
b4CR[c4CR] = hA - (hB + hC + hD);
b4GR[c4GR] = hB - (hA + hC + hD);
b4KR[c4KR] = hC - (hA + hB + hD);
b4OR[c4OR] = hD - (hA + hB + hC);
c4CR++; if (c4CR < 0 || c4CR > d4C) c4CR = 0;
c4GR++; if (c4GR < 0 || c4GR > d4G) c4GR = 0;
c4KR++; if (c4KR < 0 || c4KR > d4K) c4KR = 0;
c4OR++; if (c4OR < 0 || c4OR > d4O) c4OR = 0;
hA = a4CR[c4CR-((c4CR > d4C)?d4C+1:0)];
hB = a4GR[c4GR-((c4GR > d4G)?d4G+1:0)];
hC = a4KR[c4KR-((c4KR > d4K)?d4K+1:0)];
hD = a4OR[c4OR-((c4OR > d4O)?d4O+1:0)];
a4BR[c4BR] = hA - (hB + hC + hD);
a4FR[c4FR] = hB - (hA + hC + hD);
a4JR[c4JR] = hC - (hA + hB + hD);
a4NR[c4NR] = hD - (hA + hB + hC);
hA = b4CR[c4CR-((c4CR > d4C)?d4C+1:0)];
hB = b4GR[c4GR-((c4GR > d4G)?d4G+1:0)];
hC = b4KR[c4KR-((c4KR > d4K)?d4K+1:0)];
hD = b4OR[c4OR-((c4OR > d4O)?d4O+1:0)];
b4BR[c4BR] = hA - (hB + hC + hD);
b4FR[c4FR] = hB - (hA + hC + hD);
b4JR[c4JR] = hC - (hA + hB + hD);
b4NR[c4NR] = hD - (hA + hB + hC);
c4BR++; if (c4BR < 0 || c4BR > d4B) c4BR = 0;
c4FR++; if (c4FR < 0 || c4FR > d4F) c4FR = 0;
c4JR++; if (c4JR < 0 || c4JR > d4J) c4JR = 0;
c4NR++; if (c4NR < 0 || c4NR > d4N) c4NR = 0;
hA = a4BR[c4BR-((c4BR > d4B)?d4B+1:0)];
hB = a4FR[c4FR-((c4FR > d4F)?d4F+1:0)];
hC = a4JR[c4JR-((c4JR > d4J)?d4J+1:0)];
hD = a4NR[c4NR-((c4NR > d4N)?d4N+1:0)];
a4AR[c4AR] = hA - (hB + hC + hD);
a4ER[c4ER] = hB - (hA + hC + hD);
a4IR[c4IR] = hC - (hA + hB + hD);
a4MR[c4MR] = hD - (hA + hB + hC);
hA = b4BR[c4BR-((c4BR > d4B)?d4B+1:0)];
hB = b4FR[c4FR-((c4FR > d4F)?d4F+1:0)];
hC = b4JR[c4JR-((c4JR > d4J)?d4J+1:0)];
hD = b4NR[c4NR-((c4NR > d4N)?d4N+1:0)];
b4AR[c4AR] = hA - (hB + hC + hD);
b4ER[c4ER] = hB - (hA + hC + hD);
b4IR[c4IR] = hC - (hA + hB + hD);
b4MR[c4MR] = hD - (hA + hB + hC);
c4AR++; if (c4AR < 0 || c4AR > d4A) c4AR = 0;
c4ER++; if (c4ER < 0 || c4ER > d4E) c4ER = 0;
c4IR++; if (c4IR < 0 || c4IR > d4I) c4IR = 0;
c4MR++; if (c4MR < 0 || c4MR > d4M) c4MR = 0;
hA = a4AR[c4AR-((c4AR > d4A)?d4A+1:0)];
hB = a4ER[c4ER-((c4ER > d4E)?d4E+1:0)];
hC = a4IR[c4IR-((c4IR > d4I)?d4I+1:0)];
hD = a4MR[c4MR-((c4MR > d4M)?d4M+1:0)];
f4DR = hA - (hB + hC + hD);
f4HR = hB - (hA + hC + hD);
f4LR = hC - (hA + hB + hD);
f4PR = hD - (hA + hB + hC);
mainSampleR = (hA + hB + hC + hD)*0.125;
hA = b4AR[c4AR-((c4AR > d4A)?d4A+1:0)];
hB = b4ER[c4ER-((c4ER > d4E)?d4E+1:0)];
hC = b4IR[c4IR-((c4IR > d4I)?d4I+1:0)];
hD = b4MR[c4MR-((c4MR > d4M)?d4M+1:0)];
g4DR = hA - (hB + hC + hD);
g4HR = hB - (hA + hC + hD);
g4LR = hC - (hA + hB + hD);
g4PR = hD - (hA + hB + hC);
dualmonoSampleR = (hA + hB + hC + hD)*0.125;
//dual mono version is wider = 1.0 at the center
//with mainsample 0.0 and 2.0 (only at the edges)
//with mainsample out of phase when over 1.0
//couldn't re-do the arrays perfectly, so instead
//we keep exactly the same cross-matrix,
//but we flip the sides we're using for initial reverb.
//then, dualmono remains totally dualmono, and blend a bit in for wideness.
if (wider < 1.0) {
inputSampleL = (dualmonoSampleR*wider) + (mainSampleL*(1.0-wider));
inputSampleR = (dualmonoSampleL*wider) + (mainSampleR*(1.0-wider));
} else {
inputSampleL = (dualmonoSampleR*(2.0-wider)) + (mainSampleL*(wider-1.0));
inputSampleR = (dualmonoSampleL*(2.0-wider)) + (-mainSampleR*(wider-1.0));
}
bez[bez_CL] = bez[bez_BL];
bez[bez_BL] = bez[bez_AL];
bez[bez_AL] = inputSampleL;
bez[bez_SampL] = 0.0;
bez[bez_CR] = bez[bez_BR];
bez[bez_BR] = bez[bez_AR];
bez[bez_AR] = inputSampleR;
bez[bez_SampR] = 0.0;
}
double X = bez[bez_cycle]*bezTrim;
double CBL = (bez[bez_CL]*(1.0-X))+(bez[bez_BL]*X);
double CBR = (bez[bez_CR]*(1.0-X))+(bez[bez_BR]*X);
double BAL = (bez[bez_BL]*(1.0-X))+(bez[bez_AL]*X);
double BAR = (bez[bez_BR]*(1.0-X))+(bez[bez_AR]*X);
inputSampleL = (bez[bez_BL]+(CBL*(1.0-X))+(BAL*X))*-0.25;
inputSampleR = (bez[bez_BR]+(CBR*(1.0-X))+(BAR*X))*-0.25;
bezF[bez_cycle] += derezFreq;
bezF[bez_SampL] += (inputSampleL * derezFreq);
bezF[bez_SampR] += (inputSampleR * derezFreq);
if (bezF[bez_cycle] > 1.0) { //hit the end point and we do a filter sample
bezF[bez_cycle] = 0.0;
bezF[bez_CL] = bezF[bez_BL];
bezF[bez_BL] = bezF[bez_AL];
bezF[bez_AL] = bezF[bez_SampL];
bezF[bez_SampL] = 0.0;
bezF[bez_CR] = bezF[bez_BR];
bezF[bez_BR] = bezF[bez_AR];
bezF[bez_AR] = bezF[bez_SampR];
bezF[bez_SampR] = 0.0;
}
X = bezF[bez_cycle]*bezFreqTrim;
double CBLfreq = (bezF[bez_CL]*(1.0-X))+(bezF[bez_BL]*X);
double BALfreq = (bezF[bez_BL]*(1.0-X))+(bezF[bez_AL]*X);
inputSampleL = (bezF[bez_BL]+(CBLfreq*(1.0-X))+(BALfreq*X))*0.5;
double CBRfreq = (bezF[bez_CR]*(1.0-X))+(bezF[bez_BR]*X);
double BARfreq = (bezF[bez_BR]*(1.0-X))+(bezF[bez_AR]*X);
inputSampleR = (bezF[bez_BR]+(CBRfreq*(1.0-X))+(BARfreq*X))*0.5;
//filtering the reverb separately, after making it
inputSampleL = (inputSampleL * wet)+(drySampleL * (1.0-wet));
inputSampleR = (inputSampleR * wet)+(drySampleR * (1.0-wet));
//begin 32 bit stereo floating point dither
int expon; frexpf((float)inputSampleL, &expon);
fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
frexpf((float)inputSampleR, &expon);
fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
//end 32 bit stereo floating point dither
*outputL = inputSampleL;
*outputR = inputSampleR;
//direct stereo out
inputL += 1;
inputR += 1;
outputL += 1;
outputR += 1;
}
return noErr;
}
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