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airwindows/plugins/MacAU/MidAmp/MidAmp.cpp
Christopher Johnson f06250c082 Clarifying Licensing in boilerplate code generation
2022-11-21 09:20:21 -05:00

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/*
* File: MidAmp.cpp
*
* Version: 1.0
*
* Created: 3/28/22
*
* Copyright: Copyright © 2022 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.
*
*/
/*=============================================================================
MidAmp.cpp
=============================================================================*/
#include "MidAmp.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(MidAmp)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// MidAmp::MidAmp
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
MidAmp::MidAmp(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 );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// MidAmp::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult MidAmp::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// MidAmp::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult MidAmp::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;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// MidAmp::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult MidAmp::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// MidAmp::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult MidAmp::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// MidAmp::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult MidAmp::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____MidAmpEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// MidAmp::MidAmpKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void MidAmp::MidAmpKernel::Reset()
{
lastSample = 0.0;
storeSample = 0.0;
lastSlew = 0.0;
iirSampleA = 0.0;
iirSampleB = 0.0;
iirSampleC = 0.0;
iirSampleD = 0.0;
iirSampleE = 0.0;
iirSampleF = 0.0;
iirSampleG = 0.0;
iirSampleH = 0.0;
for (int fcount = 0; fcount < 257; fcount++) {Odd[fcount] = 0.0; Even[fcount] = 0.0;}
count = 0;
flip = false; //amp
for(int fcount = 0; fcount < 90; fcount++) {b[fcount] = 0;}
smoothCabA = 0.0; smoothCabB = 0.0; lastCabSample = 0.0; //cab
for (int fcount = 0; fcount < 9; fcount++) {lastRef[fcount] = 0.0;}
cycle = 0; //undersampling
for (int x = 0; x < fix_total; x++) {
fixA[x] = 0.0;
fixB[x] = 0.0;
fixC[x] = 0.0;
fixD[x] = 0.0;
fixE[x] = 0.0;
fixF[x] = 0.0;
} //filtering
fpd = 1.0; while (fpd < 16386) fpd = rand()*UINT32_MAX;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// MidAmp::MidAmpKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void MidAmp::MidAmpKernel::Process( const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence )
{
UInt32 nSampleFrames = inFramesToProcess;
const Float32 *sourceP = inSourceP;
Float32 *destP = inDestP;
Float64 inputlevel = GetParameter( kParam_One )*3.0;
Float64 samplerate = GetSampleRate();
Float64 EQ = (GetParameter( kParam_Two )/ samplerate)*22050.0;
Float64 basstrim = GetParameter( kParam_Two );
Float64 outputlevel = GetParameter( kParam_Three );
double wet = GetParameter( kParam_Four );
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= samplerate;
int cycleEnd = floor(overallscale);
if (cycleEnd < 1) cycleEnd = 1;
if (cycleEnd > 4) cycleEnd = 4;
//this is going to be 2 for 88.1 or 96k, 3 for silly people, 4 for 176 or 192k
if (cycle > cycleEnd-1) cycle = cycleEnd-1; //sanity check
Float64 bleed = outputlevel/6.0;
Float64 BEQ = (bleed / samplerate)*44100.0;
Float64 resultB;
int side = (int)(0.0006092985*samplerate);
if (side > 126) side = 126;
int down = side + 1;
inputlevel = (inputlevel + (inputlevel*basstrim))/2.0;
double cutoff = (15000.0+(GetParameter( kParam_Two )*10000.0)) / GetSampleRate();
if (cutoff > 0.49) cutoff = 0.49; //don't crash if run at 44.1k
if (cutoff < 0.001) cutoff = 0.001; //or if cutoff's too low
fixF[fix_freq] = fixE[fix_freq] = fixD[fix_freq] = fixC[fix_freq] = fixB[fix_freq] = fixA[fix_freq] = cutoff;
fixA[fix_reso] = 4.46570214;
fixB[fix_reso] = 1.51387132;
fixC[fix_reso] = 0.93979296;
fixD[fix_reso] = 0.70710678;
fixE[fix_reso] = 0.52972649;
fixF[fix_reso] = 0.50316379;
double K = tan(M_PI * fixA[fix_freq]); //lowpass
double norm = 1.0 / (1.0 + K / fixA[fix_reso] + K * K);
fixA[fix_a0] = K * K * norm;
fixA[fix_a1] = 2.0 * fixA[fix_a0];
fixA[fix_a2] = fixA[fix_a0];
fixA[fix_b1] = 2.0 * (K * K - 1.0) * norm;
fixA[fix_b2] = (1.0 - K / fixA[fix_reso] + K * K) * norm;
K = tan(M_PI * fixB[fix_freq]);
norm = 1.0 / (1.0 + K / fixB[fix_reso] + K * K);
fixB[fix_a0] = K * K * norm;
fixB[fix_a1] = 2.0 * fixB[fix_a0];
fixB[fix_a2] = fixB[fix_a0];
fixB[fix_b1] = 2.0 * (K * K - 1.0) * norm;
fixB[fix_b2] = (1.0 - K / fixB[fix_reso] + K * K) * norm;
K = tan(M_PI * fixC[fix_freq]);
norm = 1.0 / (1.0 + K / fixC[fix_reso] + K * K);
fixC[fix_a0] = K * K * norm;
fixC[fix_a1] = 2.0 * fixC[fix_a0];
fixC[fix_a2] = fixC[fix_a0];
fixC[fix_b1] = 2.0 * (K * K - 1.0) * norm;
fixC[fix_b2] = (1.0 - K / fixC[fix_reso] + K * K) * norm;
K = tan(M_PI * fixD[fix_freq]);
norm = 1.0 / (1.0 + K / fixD[fix_reso] + K * K);
fixD[fix_a0] = K * K * norm;
fixD[fix_a1] = 2.0 * fixD[fix_a0];
fixD[fix_a2] = fixD[fix_a0];
fixD[fix_b1] = 2.0 * (K * K - 1.0) * norm;
fixD[fix_b2] = (1.0 - K / fixD[fix_reso] + K * K) * norm;
K = tan(M_PI * fixE[fix_freq]);
norm = 1.0 / (1.0 + K / fixE[fix_reso] + K * K);
fixE[fix_a0] = K * K * norm;
fixE[fix_a1] = 2.0 * fixE[fix_a0];
fixE[fix_a2] = fixE[fix_a0];
fixE[fix_b1] = 2.0 * (K * K - 1.0) * norm;
fixE[fix_b2] = (1.0 - K / fixE[fix_reso] + K * K) * norm;
K = tan(M_PI * fixF[fix_freq]);
norm = 1.0 / (1.0 + K / fixF[fix_reso] + K * K);
fixF[fix_a0] = K * K * norm;
fixF[fix_a1] = 2.0 * fixF[fix_a0];
fixF[fix_a2] = fixF[fix_a0];
fixF[fix_b1] = 2.0 * (K * K - 1.0) * norm;
fixF[fix_b2] = (1.0 - K / fixF[fix_reso] + K * K) * norm;
while (nSampleFrames-- > 0) {
double inputSample = *sourceP;
if (fabs(inputSample)<1.18e-23) inputSample = fpd * 1.18e-17;
double drySample = inputSample;
double outSample = (inputSample * fixA[fix_a0]) + fixA[fix_sL1];
fixA[fix_sL1] = (inputSample * fixA[fix_a1]) - (outSample * fixA[fix_b1]) + fixA[fix_sL2];
fixA[fix_sL2] = (inputSample * fixA[fix_a2]) - (outSample * fixA[fix_b2]);
inputSample = outSample; //fixed biquad filtering ultrasonics
double skew = (inputSample - lastSample);
lastSample = inputSample;
//skew will be direction/angle
double bridgerectifier = fabs(skew);
if (bridgerectifier > 3.1415926) bridgerectifier = 3.1415926;
//for skew we want it to go to zero effect again, so we use full range of the sine
bridgerectifier = sin(bridgerectifier);
if (skew > 0) skew = bridgerectifier;
else skew = -bridgerectifier;
//skew is now sined and clamped and then re-amplified again
skew *= inputSample;
outSample = (inputSample * fixB[fix_a0]) + fixB[fix_sL1];
fixB[fix_sL1] = (inputSample * fixB[fix_a1]) - (outSample * fixB[fix_b1]) + fixB[fix_sL2];
fixB[fix_sL2] = (inputSample * fixB[fix_a2]) - (outSample * fixB[fix_b2]);
inputSample = outSample; //fixed biquad filtering ultrasonics
inputSample *= inputlevel;
double offset = (1.0 - EQ) + (fabs(inputSample)*EQ);
if (offset < 0) offset = 0;
if (offset > 1) offset = 1;
iirSampleA = (iirSampleA * (1 - (offset * EQ))) + (inputSample * (offset * EQ));
inputSample = inputSample - (iirSampleA*0.8);
//highpass
bridgerectifier = fabs(inputSample) + skew;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
bridgerectifier = (sin(bridgerectifier) * 1.57079633) + skew;
if (inputSample > 0) inputSample = (inputSample*(-0.57079633+skew))+(bridgerectifier*(1.57079633+skew));
else inputSample = (inputSample*(-0.57079633+skew))-(bridgerectifier*(1.57079633+skew));
//overdrive
iirSampleC = (iirSampleC * (1 - (offset * EQ))) + (inputSample * (offset * EQ));
inputSample = inputSample - (iirSampleC*0.6);
//highpass
skew /= 1.57079633;
//finished first gain stage
outSample = (inputSample * fixC[fix_a0]) + fixC[fix_sL1];
fixC[fix_sL1] = (inputSample * fixC[fix_a1]) - (outSample * fixC[fix_b1]) + fixC[fix_sL2];
fixC[fix_sL2] = (inputSample * fixC[fix_a2]) - (outSample * fixC[fix_b2]);
inputSample = outSample; //fixed biquad filtering ultrasonics
inputSample *= inputlevel;
offset = (1.0 + offset) / 2.0;
bridgerectifier = fabs(inputSample) + skew;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
bridgerectifier = (sin(bridgerectifier) * 1.57079633) + skew;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
bridgerectifier = sin(bridgerectifier) * 1.57079633;
if (inputSample > 0) inputSample = (inputSample*(-0.57079633+skew))+(bridgerectifier*(1.57079633+skew));
else inputSample = (inputSample*(-0.57079633+skew))-(bridgerectifier*(1.57079633+skew));
//overdrive
iirSampleG = (iirSampleG * (1 - EQ)) + (inputSample * EQ);
inputSample = inputSample - (iirSampleG*0.4);
//highpass. no further basscut, no more highpasses
iirSampleD = (iirSampleD * (1 - (offset * EQ))) + (inputSample * (offset * EQ));
inputSample = iirSampleD;
skew /= 1.57079633;
//lowpass. Use offset from before gain stage
outSample = (inputSample * fixD[fix_a0]) + fixD[fix_sL1];
fixD[fix_sL1] = (inputSample * fixD[fix_a1]) - (outSample * fixD[fix_b1]) + fixD[fix_sL2];
fixD[fix_sL2] = (inputSample * fixD[fix_a2]) - (outSample * fixD[fix_b2]);
inputSample = outSample; //fixed biquad filtering ultrasonics
inputSample *= inputlevel;
bridgerectifier = fabs(inputSample) + skew;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
bridgerectifier = sin(bridgerectifier) * 1.57079633;
if (inputSample > 0) inputSample = (inputSample*(-0.57079633+skew))+(bridgerectifier*(1.57079633+skew));
else inputSample = (inputSample*(-0.57079633+skew))-(bridgerectifier*(1.57079633+skew));
//output stage has less gain, no highpass, straight lowpass
iirSampleE = (iirSampleE * (1 - EQ)) + (inputSample * EQ);
inputSample = iirSampleE;
//lowpass. Use offset from before gain stage
outSample = (inputSample * fixE[fix_a0]) + fixE[fix_sL1];
fixE[fix_sL1] = (inputSample * fixE[fix_a1]) - (outSample * fixE[fix_b1]) + fixE[fix_sL2];
fixE[fix_sL2] = (inputSample * fixE[fix_a2]) - (outSample * fixE[fix_b2]);
inputSample = outSample; //fixed biquad filtering ultrasonics
iirSampleF = (iirSampleF * (1 - (offset * BEQ))) + (inputSample * (offset * BEQ));
//extra lowpass for 4*12" speakers
if (count < 0 || count > 128) {count = 128;}
if (flip)
{
Odd[count+128] = Odd[count] = iirSampleF;
resultB = (Odd[count+down] + Odd[count+side]);
}
else
{
Even[count+128] = Even[count] = iirSampleF;
resultB = (Even[count+down] + Even[count+side]);
}
count--;
iirSampleB = (iirSampleB * (1 - (offset * BEQ))) + (resultB * (offset * BEQ));
inputSample += (iirSampleB*bleed);
//extra lowpass for 4*12" speakers
iirSampleH = (iirSampleH * (1 - (offset * BEQ))) + (inputSample * (offset * BEQ));
inputSample += iirSampleH;
inputSample = sin(inputSample*outputlevel);
double randy = ((double(fpd)/UINT32_MAX)*0.047);
inputSample = ((inputSample*(1-randy))+(storeSample*randy))*outputlevel;
storeSample = inputSample;
outSample = (inputSample * fixF[fix_a0]) + fixF[fix_sL1];
fixF[fix_sL1] = (inputSample * fixF[fix_a1]) - (outSample * fixF[fix_b1]) + fixF[fix_sL2];
fixF[fix_sL2] = (inputSample * fixF[fix_a2]) - (outSample * fixF[fix_b2]);
inputSample = outSample; //fixed biquad filtering ultrasonics
flip = !flip;
if (wet !=1.0) {
inputSample = (inputSample * wet) + (drySample * (1.0-wet));
}
//Dry/Wet control, defaults to the last slider
//amp
cycle++;
if (cycle == cycleEnd) {
//drySample = inputSample;
double temp = (inputSample + smoothCabA)/3.0;
smoothCabA = inputSample;
inputSample = temp;
b[87] = b[86]; b[86] = b[85]; b[85] = b[84]; b[84] = b[83]; b[83] = b[82]; b[82] = b[81]; b[81] = b[80]; b[80] = b[79];
b[79] = b[78]; b[78] = b[77]; b[77] = b[76]; b[76] = b[75]; b[75] = b[74]; b[74] = b[73]; b[73] = b[72]; b[72] = b[71];
b[71] = b[70]; b[70] = b[69]; b[69] = b[68]; b[68] = b[67]; b[67] = b[66]; b[66] = b[65]; b[65] = b[64]; b[64] = b[63];
b[63] = b[62]; b[62] = b[61]; b[61] = b[60]; b[60] = b[59]; b[59] = b[58]; b[58] = b[57]; b[57] = b[56]; b[56] = b[55];
b[55] = b[54]; b[54] = b[53]; b[53] = b[52]; b[52] = b[51]; b[51] = b[50]; b[50] = b[49]; b[49] = b[48]; b[48] = b[47];
b[47] = b[46]; b[46] = b[45]; b[45] = b[44]; b[44] = b[43]; b[43] = b[42]; b[42] = b[41]; b[41] = b[40]; b[40] = b[39];
b[39] = b[38]; b[38] = b[37]; b[37] = b[36]; b[36] = b[35]; b[35] = b[34]; b[34] = b[33]; b[33] = b[32]; b[32] = b[31];
b[31] = b[30]; b[30] = b[29]; b[29] = b[28]; b[28] = b[27]; b[27] = b[26]; b[26] = b[25]; b[25] = b[24]; b[24] = b[23];
b[23] = b[22]; b[22] = b[21]; b[21] = b[20]; b[20] = b[19]; b[19] = b[18]; b[18] = b[17]; b[17] = b[16]; b[16] = b[15];
b[15] = b[14]; b[14] = b[13]; b[13] = b[12]; b[12] = b[11]; b[11] = b[10]; b[10] = b[9]; b[9] = b[8]; b[8] = b[7];
b[7] = b[6]; b[6] = b[5]; b[5] = b[4]; b[4] = b[3]; b[3] = b[2]; b[2] = b[1]; b[1] = b[0]; b[0] = inputSample;
inputSample += (b[1] * (1.31819680801404560 + (0.00362521700518292*fabs(b[1]))));
inputSample += (b[2] * (1.37738284126127919 + (0.14134596126256205*fabs(b[2]))));
inputSample += (b[3] * (1.09957637225311622 + (0.33199581815501555*fabs(b[3]))));
inputSample += (b[4] * (0.62025358899656258 + (0.37476042042088142*fabs(b[4]))));
inputSample += (b[5] * (0.12926194402137478 + (0.24702655568406759*fabs(b[5]))));
inputSample -= (b[6] * (0.28927985011367602 - (0.13289168298307708*fabs(b[6]))));
inputSample -= (b[7] * (0.56518146339033448 - (0.11026641793526121*fabs(b[7]))));
inputSample -= (b[8] * (0.59843200696815069 - (0.10139909232154271*fabs(b[8]))));
inputSample -= (b[9] * (0.45219971861789204 - (0.13313355255903159*fabs(b[9]))));
inputSample -= (b[10] * (0.32520490032331351 - (0.29009061730364216*fabs(b[10]))));
inputSample -= (b[11] * (0.29773131872442909 - (0.45307495356996669*fabs(b[11]))));
inputSample -= (b[12] * (0.31738895975218867 - (0.43198591958928922*fabs(b[12]))));
inputSample -= (b[13] * (0.33336150604703757 - (0.24240412850274029*fabs(b[13]))));
inputSample -= (b[14] * (0.32461638442042151 - (0.02779297492397464*fabs(b[14]))));
inputSample -= (b[15] * (0.27812829473787770 + (0.15565718905032455*fabs(b[15]))));
inputSample -= (b[16] * (0.19413454458668097 + (0.32087693535188599*fabs(b[16]))));
inputSample -= (b[17] * (0.12378036344480114 + (0.37736575956794161*fabs(b[17]))));
inputSample -= (b[18] * (0.12550494837257106 + (0.25593811142722300*fabs(b[18]))));
inputSample -= (b[19] * (0.17725736033713696 + (0.07708896413593636*fabs(b[19]))));
inputSample -= (b[20] * (0.22023699647700670 - (0.01600371273599124*fabs(b[20]))));
inputSample -= (b[21] * (0.21987645486953747 + (0.00973336938352798*fabs(b[21]))));
inputSample -= (b[22] * (0.15014276479707978 + (0.11602269600138954*fabs(b[22]))));
inputSample -= (b[23] * (0.05176520203073560 + (0.20383164255692698*fabs(b[23]))));
inputSample -= (b[24] * (0.04276687165294867 + (0.17785002166834518*fabs(b[24]))));
inputSample -= (b[25] * (0.15951546388137597 + (0.06748854885822464*fabs(b[25]))));
inputSample -= (b[26] * (0.30211952144352616 - (0.03440494237025149*fabs(b[26]))));
inputSample -= (b[27] * (0.36462803375134506 - (0.05874284362202409*fabs(b[27]))));
inputSample -= (b[28] * (0.32283960219377539 + (0.01189623197958362*fabs(b[28]))));
inputSample -= (b[29] * (0.19245178663350720 + (0.11088858383712991*fabs(b[29]))));
inputSample += (b[30] * (0.00681589563349590 - (0.16314250963457660*fabs(b[30]))));
inputSample += (b[31] * (0.20927798345622584 - (0.16952981620487462*fabs(b[31]))));
inputSample += (b[32] * (0.25638846543430976 - (0.11462562122281153*fabs(b[32]))));
inputSample += (b[33] * (0.04584495673888605 + (0.04669671229804190*fabs(b[33]))));
inputSample -= (b[34] * (0.25221561978187662 - (0.19250758741703761*fabs(b[34]))));
inputSample -= (b[35] * (0.35662801992424953 - (0.12244680002787561*fabs(b[35]))));
inputSample -= (b[36] * (0.21498114329314663 + (0.12152120956991189*fabs(b[36]))));
inputSample += (b[37] * (0.00968605571673376 - (0.30597812512858558*fabs(b[37]))));
inputSample += (b[38] * (0.18029119870614621 - (0.31569386468576782*fabs(b[38]))));
inputSample += (b[39] * (0.22744437185251629 - (0.18028438460422197*fabs(b[39]))));
inputSample += (b[40] * (0.09725687638959078 + (0.05479918522830433*fabs(b[40]))));
inputSample -= (b[41] * (0.17970389267353537 - (0.29222750363124067*fabs(b[41]))));
inputSample -= (b[42] * (0.42371969704763018 - (0.34924957781842314*fabs(b[42]))));
inputSample -= (b[43] * (0.43313266755788055 - (0.11503731970288061*fabs(b[43]))));
inputSample -= (b[44] * (0.22178165627851801 + (0.25002925550036226*fabs(b[44]))));
inputSample -= (b[45] * (0.00410198176852576 + (0.43283281457037676*fabs(b[45]))));
inputSample += (b[46] * (0.09072426344812032 - (0.35318250460706446*fabs(b[46]))));
inputSample += (b[47] * (0.08405839183965140 - (0.16936391987143717*fabs(b[47]))));
inputSample -= (b[48] * (0.01110419756114383 - (0.01247164991313877*fabs(b[48]))));
inputSample -= (b[49] * (0.18593334646855278 - (0.14513260199423966*fabs(b[49]))));
inputSample -= (b[50] * (0.33665010871497486 - (0.14456206192169668*fabs(b[50]))));
inputSample -= (b[51] * (0.32644968491439380 + (0.01594380759082303*fabs(b[51]))));
inputSample -= (b[52] * (0.14855437679485431 + (0.23555511219002742*fabs(b[52]))));
inputSample += (b[53] * (0.05113019250820622 - (0.35556617126595202*fabs(b[53]))));
inputSample += (b[54] * (0.12915754942362243 - (0.28571671825750300*fabs(b[54]))));
inputSample += (b[55] * (0.07406865846069306 - (0.10543886479975995*fabs(b[55]))));
inputSample -= (b[56] * (0.03669573814193980 - (0.03194267657582078*fabs(b[56]))));
inputSample -= (b[57] * (0.13429103278009327 - (0.06145796486786051*fabs(b[57]))));
inputSample -= (b[58] * (0.17884021749974641 - (0.00156626902982124*fabs(b[58]))));
inputSample -= (b[59] * (0.16138212225178239 + (0.09402070836837134*fabs(b[59]))));
inputSample -= (b[60] * (0.10867028245257521 + (0.15407963447815898*fabs(b[60]))));
inputSample -= (b[61] * (0.06312416389213464 + (0.11241095544179526*fabs(b[61]))));
inputSample -= (b[62] * (0.05826376574081994 - (0.03635253545701986*fabs(b[62]))));
inputSample -= (b[63] * (0.07991631148258237 - (0.18041947557579863*fabs(b[63]))));
inputSample -= (b[64] * (0.07777397532506500 - (0.20817156738202205*fabs(b[64]))));
inputSample -= (b[65] * (0.03812528734394271 - (0.13679963125162486*fabs(b[65]))));
inputSample += (b[66] * (0.00204900323943951 + (0.04009000730101046*fabs(b[66]))));
inputSample += (b[67] * (0.01779599498119764 - (0.04218637577942354*fabs(b[67]))));
inputSample += (b[68] * (0.00950301949319113 - (0.07908911305044238*fabs(b[68]))));
inputSample -= (b[69] * (0.04283600714814891 + (0.02716262334097985*fabs(b[69]))));
inputSample -= (b[70] * (0.14478320837041933 - (0.08823515277628832*fabs(b[70]))));
inputSample -= (b[71] * (0.23250267035795688 - (0.15334197814956568*fabs(b[71]))));
inputSample -= (b[72] * (0.22369031446225857 - (0.08550989980799503*fabs(b[72]))));
inputSample -= (b[73] * (0.11142757883989868 + (0.08321482928259660*fabs(b[73]))));
inputSample += (b[74] * (0.02752318631713307 - (0.25252906099212968*fabs(b[74]))));
inputSample += (b[75] * (0.11940028414727490 - (0.34358127205009553*fabs(b[75]))));
inputSample += (b[76] * (0.12702057126698307 - (0.31808560130583663*fabs(b[76]))));
inputSample += (b[77] * (0.03639067777025356 - (0.17970282734717846*fabs(b[77]))));
inputSample -= (b[78] * (0.11389848143835518 + (0.00470616711331971*fabs(b[78]))));
inputSample -= (b[79] * (0.23024072979374310 - (0.09772245468884058*fabs(b[79]))));
inputSample -= (b[80] * (0.24389015061112601 - (0.09600959885615798*fabs(b[80]))));
inputSample -= (b[81] * (0.16680269075295703 - (0.05194978963662898*fabs(b[81]))));
inputSample -= (b[82] * (0.05108041495077725 - (0.01796071525570735*fabs(b[82]))));
inputSample += (b[83] * (0.06489835353859555 - (0.00808013770331126*fabs(b[83]))));
inputSample += (b[84] * (0.15481511440233464 - (0.02674063848284838*fabs(b[84]))));
inputSample += (b[85] * (0.18620867857907253 - (0.01786423699465214*fabs(b[85]))));
inputSample += (b[86] * (0.13879832139055756 + (0.01584446839973597*fabs(b[86]))));
inputSample += (b[87] * (0.04878235109120615 + (0.02962866516075816*fabs(b[87]))));
temp = (inputSample + smoothCabB)/3.0;
smoothCabB = inputSample;
inputSample = temp/4.0;
randy = ((double(fpd)/UINT32_MAX)*0.039);
drySample = ((((inputSample*(1-randy))+(lastCabSample*randy))*wet)+(drySample*(1.0-wet)))*outputlevel;
lastCabSample = inputSample;
inputSample = drySample; //cab
if (cycleEnd == 4) {
lastRef[0] = lastRef[4]; //start from previous last
lastRef[2] = (lastRef[0] + inputSample)/2; //half
lastRef[1] = (lastRef[0] + lastRef[2])/2; //one quarter
lastRef[3] = (lastRef[2] + inputSample)/2; //three quarters
lastRef[4] = inputSample; //full
}
if (cycleEnd == 3) {
lastRef[0] = lastRef[3]; //start from previous last
lastRef[2] = (lastRef[0]+lastRef[0]+inputSample)/3; //third
lastRef[1] = (lastRef[0]+inputSample+inputSample)/3; //two thirds
lastRef[3] = inputSample; //full
}
if (cycleEnd == 2) {
lastRef[0] = lastRef[2]; //start from previous last
lastRef[1] = (lastRef[0] + inputSample)/2; //half
lastRef[2] = inputSample; //full
}
if (cycleEnd == 1) lastRef[0] = inputSample;
cycle = 0; //reset
inputSample = lastRef[cycle];
} else {
inputSample = lastRef[cycle];
//we are going through our references now
}
switch (cycleEnd) //multi-pole average using lastRef[] variables
{
case 4:
lastRef[8] = inputSample; inputSample = (inputSample+lastRef[7])*0.5;
lastRef[7] = lastRef[8]; //continue, do not break
case 3:
lastRef[8] = inputSample; inputSample = (inputSample+lastRef[6])*0.5;
lastRef[6] = lastRef[8]; //continue, do not break
case 2:
lastRef[8] = inputSample; inputSample = (inputSample+lastRef[5])*0.5;
lastRef[5] = lastRef[8]; //continue, do not break
case 1:
break; //no further averaging
} //undersampling
//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;
}
}
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