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

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/* ========================================
* Tape - Tape.h
* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
* ======================================== */
#ifndef __Tape_H
#include "Tape.h"
#endif
void Tape::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
double inputgain = pow(10.0,((A-0.5)*24.0)/20.0);
double bumpgain = B*0.1;
double HeadBumpFreq = 0.12/overallscale;
double softness = 0.618033988749894848204586;
double RollAmount = (1.0 - softness) / overallscale;
//[0] is frequency: 0.000001 to 0.499999 is near-zero to near-Nyquist
//[1] is resonance, 0.7071 is Butterworth. Also can't be zero
biquadAL[0] = biquadBL[0] = biquadAR[0] = biquadBR[0] = 0.0072/overallscale;
biquadAL[1] = biquadBL[1] = biquadAR[1] = biquadBR[1] = 0.0009;
double K = tan(M_PI * biquadBR[0]);
double norm = 1.0 / (1.0 + K / biquadBR[1] + K * K);
biquadAL[2] = biquadBL[2] = biquadAR[2] = biquadBR[2] = K / biquadBR[1] * norm;
biquadAL[4] = biquadBL[4] = biquadAR[4] = biquadBR[4] = -biquadBR[2];
biquadAL[5] = biquadBL[5] = biquadAR[5] = biquadBR[5] = 2.0 * (K * K - 1.0) * norm;
biquadAL[6] = biquadBL[6] = biquadAR[6] = biquadBR[6] = (1.0 - K / biquadBR[1] + K * K) * norm;
biquadCL[0] = biquadDL[0] = biquadCR[0] = biquadDR[0] = 0.032/overallscale;
biquadCL[1] = biquadDL[1] = biquadCR[1] = biquadDR[1] = 0.0007;
K = tan(M_PI * biquadDR[0]);
norm = 1.0 / (1.0 + K / biquadDR[1] + K * K);
biquadCL[2] = biquadDL[2] = biquadCR[2] = biquadDR[2] = K / biquadDR[1] * norm;
biquadCL[4] = biquadDL[4] = biquadCR[4] = biquadDR[4] = -biquadDR[2];
biquadCL[5] = biquadDL[5] = biquadCR[5] = biquadDR[5] = 2.0 * (K * K - 1.0) * norm;
biquadCL[6] = biquadDL[6] = biquadCR[6] = biquadDR[6] = (1.0 - K / biquadDR[1] + K * K) * norm;
while (--sampleFrames >= 0)
{
double inputSampleL = *in1;
double inputSampleR = *in2;
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;
double HighsSampleL = 0.0;
double HighsSampleR = 0.0;
double NonHighsSampleL = 0.0;
double NonHighsSampleR = 0.0;
double tempSample;
if (flip)
{
iirMidRollerAL = (iirMidRollerAL * (1.0 - RollAmount)) + (inputSampleL * RollAmount);
iirMidRollerAR = (iirMidRollerAR * (1.0 - RollAmount)) + (inputSampleR * RollAmount);
HighsSampleL = inputSampleL - iirMidRollerAL;
HighsSampleR = inputSampleR - iirMidRollerAR;
NonHighsSampleL = iirMidRollerAL;
NonHighsSampleR = iirMidRollerAR;
iirHeadBumpAL += (inputSampleL * 0.05);
iirHeadBumpAR += (inputSampleR * 0.05);
iirHeadBumpAL -= (iirHeadBumpAL * iirHeadBumpAL * iirHeadBumpAL * HeadBumpFreq);
iirHeadBumpAR -= (iirHeadBumpAR * iirHeadBumpAR * iirHeadBumpAR * HeadBumpFreq);
iirHeadBumpAL = sin(iirHeadBumpAL);
iirHeadBumpAR = sin(iirHeadBumpAR);
tempSample = (iirHeadBumpAL * biquadAL[2]) + biquadAL[7];
biquadAL[7] = (iirHeadBumpAL * biquadAL[3]) - (tempSample * biquadAL[5]) + biquadAL[8];
biquadAL[8] = (iirHeadBumpAL * biquadAL[4]) - (tempSample * biquadAL[6]);
iirHeadBumpAL = tempSample; //interleaved biquad
if (iirHeadBumpAL > 1.0) iirHeadBumpAL = 1.0;
if (iirHeadBumpAL < -1.0) iirHeadBumpAL = -1.0;
iirHeadBumpAL = asin(iirHeadBumpAL);
tempSample = (iirHeadBumpAR * biquadAR[2]) + biquadAR[7];
biquadAR[7] = (iirHeadBumpAR * biquadAR[3]) - (tempSample * biquadAR[5]) + biquadAR[8];
biquadAR[8] = (iirHeadBumpAR * biquadAR[4]) - (tempSample * biquadAR[6]);
iirHeadBumpAR = tempSample; //interleaved biquad
if (iirHeadBumpAR > 1.0) iirHeadBumpAR = 1.0;
if (iirHeadBumpAR < -1.0) iirHeadBumpAR = -1.0;
iirHeadBumpAR = asin(iirHeadBumpAR);
inputSampleL = sin(inputSampleL);
tempSample = (inputSampleL * biquadCL[2]) + biquadCL[7];
biquadCL[7] = (inputSampleL * biquadCL[3]) - (tempSample * biquadCL[5]) + biquadCL[8];
biquadCL[8] = (inputSampleL * biquadCL[4]) - (tempSample * biquadCL[6]);
inputSampleL = tempSample; //interleaved biquad
if (inputSampleL > 1.0) inputSampleL = 1.0;
if (inputSampleL < -1.0) inputSampleL = -1.0;
inputSampleL = asin(inputSampleL);
inputSampleR = sin(inputSampleR);
tempSample = (inputSampleR * biquadCR[2]) + biquadCR[7];
biquadCR[7] = (inputSampleR * biquadCR[3]) - (tempSample * biquadCR[5]) + biquadCR[8];
biquadCR[8] = (inputSampleR * biquadCR[4]) - (tempSample * biquadCR[6]);
inputSampleR = tempSample; //interleaved biquad
if (inputSampleR > 1.0) inputSampleR = 1.0;
if (inputSampleR < -1.0) inputSampleR = -1.0;
inputSampleR = asin(inputSampleR);
} else {
iirMidRollerBL = (iirMidRollerBL * (1.0 - RollAmount)) + (inputSampleL * RollAmount);
iirMidRollerBR = (iirMidRollerBR * (1.0 - RollAmount)) + (inputSampleR * RollAmount);
HighsSampleL = inputSampleL - iirMidRollerBL;
HighsSampleR = inputSampleR - iirMidRollerBR;
NonHighsSampleL = iirMidRollerBL;
NonHighsSampleR = iirMidRollerBR;
iirHeadBumpBL += (inputSampleL * 0.05);
iirHeadBumpBR += (inputSampleR * 0.05);
iirHeadBumpBL -= (iirHeadBumpBL * iirHeadBumpBL * iirHeadBumpBL * HeadBumpFreq);
iirHeadBumpBR -= (iirHeadBumpBR * iirHeadBumpBR * iirHeadBumpBR * HeadBumpFreq);
iirHeadBumpBL = sin(iirHeadBumpBL);
iirHeadBumpBR = sin(iirHeadBumpBR);
tempSample = (iirHeadBumpBL * biquadBL[2]) + biquadBL[7];
biquadBL[7] = (iirHeadBumpBL * biquadBL[3]) - (tempSample * biquadBL[5]) + biquadBL[8];
biquadBL[8] = (iirHeadBumpBL * biquadBL[4]) - (tempSample * biquadBL[6]);
iirHeadBumpBL = tempSample; //interleaved biquad
if (iirHeadBumpBL > 1.0) iirHeadBumpBL = 1.0;
if (iirHeadBumpBL < -1.0) iirHeadBumpBL = -1.0;
iirHeadBumpBL = asin(iirHeadBumpBL);
tempSample = (iirHeadBumpBR * biquadBR[2]) + biquadBR[7];
biquadBR[7] = (iirHeadBumpBR * biquadBR[3]) - (tempSample * biquadBR[5]) + biquadBR[8];
biquadBR[8] = (iirHeadBumpBR * biquadBR[4]) - (tempSample * biquadBR[6]);
iirHeadBumpBR = tempSample; //interleaved biquad
if (iirHeadBumpBR > 1.0) iirHeadBumpBR = 1.0;
if (iirHeadBumpBR < -1.0) iirHeadBumpBR = -1.0;
iirHeadBumpBR = asin(iirHeadBumpBR);
inputSampleL = sin(inputSampleL);
tempSample = (inputSampleL * biquadDL[2]) + biquadDL[7];
biquadDL[7] = (inputSampleL * biquadDL[3]) - (tempSample * biquadDL[5]) + biquadDL[8];
biquadDL[8] = (inputSampleL * biquadDL[4]) - (tempSample * biquadDL[6]);
inputSampleL = tempSample; //interleaved biquad
if (inputSampleL > 1.0) inputSampleL = 1.0;
if (inputSampleL < -1.0) inputSampleL = -1.0;
inputSampleL = asin(inputSampleL);
inputSampleR = sin(inputSampleR);
tempSample = (inputSampleR * biquadDR[2]) + biquadDR[7];
biquadDR[7] = (inputSampleR * biquadDR[3]) - (tempSample * biquadDR[5]) + biquadDR[8];
biquadDR[8] = (inputSampleR * biquadDR[4]) - (tempSample * biquadDR[6]);
inputSampleR = tempSample; //interleaved biquad
if (inputSampleR > 1.0) inputSampleR = 1.0;
if (inputSampleR < -1.0) inputSampleR = -1.0;
inputSampleR = asin(inputSampleR);
}
flip = !flip;
double groundSampleL = drySampleL - inputSampleL; //set up UnBox
double groundSampleR = drySampleR - inputSampleR; //set up UnBox
if (inputgain != 1.0) {
inputSampleL *= inputgain;
inputSampleR *= inputgain;
} //gain boost inside UnBox: do not boost fringe audio
double applySoften = fabs(HighsSampleL)*1.57079633;
if (applySoften > 1.57079633) applySoften = 1.57079633;
applySoften = 1-cos(applySoften);
if (HighsSampleL > 0) inputSampleL -= applySoften;
if (HighsSampleL < 0) inputSampleL += applySoften;
//apply Soften depending on polarity
applySoften = fabs(HighsSampleR)*1.57079633;
if (applySoften > 1.57079633) applySoften = 1.57079633;
applySoften = 1-cos(applySoften);
if (HighsSampleR > 0) inputSampleR -= applySoften;
if (HighsSampleR < 0) inputSampleR += applySoften;
//apply Soften depending on polarity
if (inputSampleL > 1.2533141373155) inputSampleL = 1.2533141373155;
if (inputSampleL < -1.2533141373155) inputSampleL = -1.2533141373155;
//clip to 1.2533141373155 to reach maximum output
inputSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((fabs(inputSampleL) == 0.0) ?1:fabs(inputSampleL));
//Spiral, for cleanest most optimal tape effect
if (inputSampleR > 1.2533141373155) inputSampleR = 1.2533141373155;
if (inputSampleR < -1.2533141373155) inputSampleR = -1.2533141373155;
//clip to 1.2533141373155 to reach maximum output
inputSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((fabs(inputSampleR) == 0.0) ?1:fabs(inputSampleR));
//Spiral, for cleanest most optimal tape effect
double suppress = (1.0-fabs(inputSampleL)) * 0.00013;
if (iirHeadBumpAL > suppress) iirHeadBumpAL -= suppress;
if (iirHeadBumpAL < -suppress) iirHeadBumpAL += suppress;
if (iirHeadBumpBL > suppress) iirHeadBumpBL -= suppress;
if (iirHeadBumpBL < -suppress) iirHeadBumpBL += suppress;
//restrain resonant quality of head bump algorithm
suppress = (1.0-fabs(inputSampleR)) * 0.00013;
if (iirHeadBumpAR > suppress) iirHeadBumpAR -= suppress;
if (iirHeadBumpAR < -suppress) iirHeadBumpAR += suppress;
if (iirHeadBumpBR > suppress) iirHeadBumpBR -= suppress;
if (iirHeadBumpBR < -suppress) iirHeadBumpBR += suppress;
//restrain resonant quality of head bump algorithm
inputSampleL += groundSampleL; //apply UnBox processing
inputSampleR += groundSampleR; //apply UnBox processing
inputSampleL += ((iirHeadBumpAL + iirHeadBumpBL) * bumpgain);//and head bump
inputSampleR += ((iirHeadBumpAR + iirHeadBumpBR) * bumpgain);//and head bump
if (lastSampleL >= 0.99)
{
if (inputSampleL < 0.99) lastSampleL = ((0.99*softness) + (inputSampleL * (1.0-softness)));
else lastSampleL = 0.99;
}
if (lastSampleL <= -0.99)
{
if (inputSampleL > -0.99) lastSampleL = ((-0.99*softness) + (inputSampleL * (1.0-softness)));
else lastSampleL = -0.99;
}
if (inputSampleL > 0.99)
{
if (lastSampleL < 0.99) inputSampleL = ((0.99*softness) + (lastSampleL * (1.0-softness)));
else inputSampleL = 0.99;
}
if (inputSampleL < -0.99)
{
if (lastSampleL > -0.99) inputSampleL = ((-0.99*softness) + (lastSampleL * (1.0-softness)));
else inputSampleL = -0.99;
}
lastSampleL = inputSampleL; //end ADClip L
if (lastSampleR >= 0.99)
{
if (inputSampleR < 0.99) lastSampleR = ((0.99*softness) + (inputSampleR * (1.0-softness)));
else lastSampleR = 0.99;
}
if (lastSampleR <= -0.99)
{
if (inputSampleR > -0.99) lastSampleR = ((-0.99*softness) + (inputSampleR * (1.0-softness)));
else lastSampleR = -0.99;
}
if (inputSampleR > 0.99)
{
if (lastSampleR < 0.99) inputSampleR = ((0.99*softness) + (lastSampleR * (1.0-softness)));
else inputSampleR = 0.99;
}
if (inputSampleR < -0.99)
{
if (lastSampleR > -0.99) inputSampleR = ((-0.99*softness) + (lastSampleR * (1.0-softness)));
else inputSampleR = -0.99;
}
lastSampleR = inputSampleR; //end ADClip R
if (inputSampleL > 0.99) inputSampleL = 0.99;
if (inputSampleL < -0.99) inputSampleL = -0.99;
//final iron bar
if (inputSampleR > 0.99) inputSampleR = 0.99;
if (inputSampleR < -0.99) inputSampleR = -0.99;
//final iron bar
//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
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
void Tape::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
double inputgain = pow(10.0,((A-0.5)*24.0)/20.0);
double bumpgain = B*0.1;
double HeadBumpFreq = 0.12/overallscale;
double softness = 0.618033988749894848204586;
double RollAmount = (1.0 - softness) / overallscale;
//[0] is frequency: 0.000001 to 0.499999 is near-zero to near-Nyquist
//[1] is resonance, 0.7071 is Butterworth. Also can't be zero
biquadAL[0] = biquadBL[0] = biquadAR[0] = biquadBR[0] = 0.0072/overallscale;
biquadAL[1] = biquadBL[1] = biquadAR[1] = biquadBR[1] = 0.0009;
double K = tan(M_PI * biquadBR[0]);
double norm = 1.0 / (1.0 + K / biquadBR[1] + K * K);
biquadAL[2] = biquadBL[2] = biquadAR[2] = biquadBR[2] = K / biquadBR[1] * norm;
biquadAL[4] = biquadBL[4] = biquadAR[4] = biquadBR[4] = -biquadBR[2];
biquadAL[5] = biquadBL[5] = biquadAR[5] = biquadBR[5] = 2.0 * (K * K - 1.0) * norm;
biquadAL[6] = biquadBL[6] = biquadAR[6] = biquadBR[6] = (1.0 - K / biquadBR[1] + K * K) * norm;
biquadCL[0] = biquadDL[0] = biquadCR[0] = biquadDR[0] = 0.032/overallscale;
biquadCL[1] = biquadDL[1] = biquadCR[1] = biquadDR[1] = 0.0007;
K = tan(M_PI * biquadDR[0]);
norm = 1.0 / (1.0 + K / biquadDR[1] + K * K);
biquadCL[2] = biquadDL[2] = biquadCR[2] = biquadDR[2] = K / biquadDR[1] * norm;
biquadCL[4] = biquadDL[4] = biquadCR[4] = biquadDR[4] = -biquadDR[2];
biquadCL[5] = biquadDL[5] = biquadCR[5] = biquadDR[5] = 2.0 * (K * K - 1.0) * norm;
biquadCL[6] = biquadDL[6] = biquadCR[6] = biquadDR[6] = (1.0 - K / biquadDR[1] + K * K) * norm;
while (--sampleFrames >= 0)
{
double inputSampleL = *in1;
double inputSampleR = *in2;
if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
if (inputgain < 1.0) {
inputSampleL *= inputgain;
inputSampleR *= inputgain;
} //gain cut before anything, even dry
double drySampleL = inputSampleL;
double drySampleR = inputSampleR;
double HighsSampleL = 0.0;
double HighsSampleR = 0.0;
double NonHighsSampleL = 0.0;
double NonHighsSampleR = 0.0;
double tempSample;
if (flip)
{
iirMidRollerAL = (iirMidRollerAL * (1.0 - RollAmount)) + (inputSampleL * RollAmount);
iirMidRollerAR = (iirMidRollerAR * (1.0 - RollAmount)) + (inputSampleR * RollAmount);
HighsSampleL = inputSampleL - iirMidRollerAL;
HighsSampleR = inputSampleR - iirMidRollerAR;
NonHighsSampleL = iirMidRollerAL;
NonHighsSampleR = iirMidRollerAR;
iirHeadBumpAL += (inputSampleL * 0.05);
iirHeadBumpAR += (inputSampleR * 0.05);
iirHeadBumpAL -= (iirHeadBumpAL * iirHeadBumpAL * iirHeadBumpAL * HeadBumpFreq);
iirHeadBumpAR -= (iirHeadBumpAR * iirHeadBumpAR * iirHeadBumpAR * HeadBumpFreq);
iirHeadBumpAL = sin(iirHeadBumpAL);
iirHeadBumpAR = sin(iirHeadBumpAR);
tempSample = (iirHeadBumpAL * biquadAL[2]) + biquadAL[7];
biquadAL[7] = (iirHeadBumpAL * biquadAL[3]) - (tempSample * biquadAL[5]) + biquadAL[8];
biquadAL[8] = (iirHeadBumpAL * biquadAL[4]) - (tempSample * biquadAL[6]);
iirHeadBumpAL = tempSample; //interleaved biquad
if (iirHeadBumpAL > 1.0) iirHeadBumpAL = 1.0;
if (iirHeadBumpAL < -1.0) iirHeadBumpAL = -1.0;
iirHeadBumpAL = asin(iirHeadBumpAL);
tempSample = (iirHeadBumpAR * biquadAR[2]) + biquadAR[7];
biquadAR[7] = (iirHeadBumpAR * biquadAR[3]) - (tempSample * biquadAR[5]) + biquadAR[8];
biquadAR[8] = (iirHeadBumpAR * biquadAR[4]) - (tempSample * biquadAR[6]);
iirHeadBumpAR = tempSample; //interleaved biquad
if (iirHeadBumpAR > 1.0) iirHeadBumpAR = 1.0;
if (iirHeadBumpAR < -1.0) iirHeadBumpAR = -1.0;
iirHeadBumpAR = asin(iirHeadBumpAR);
inputSampleL = sin(inputSampleL);
tempSample = (inputSampleL * biquadCL[2]) + biquadCL[7];
biquadCL[7] = (inputSampleL * biquadCL[3]) - (tempSample * biquadCL[5]) + biquadCL[8];
biquadCL[8] = (inputSampleL * biquadCL[4]) - (tempSample * biquadCL[6]);
inputSampleL = tempSample; //interleaved biquad
if (inputSampleL > 1.0) inputSampleL = 1.0;
if (inputSampleL < -1.0) inputSampleL = -1.0;
inputSampleL = asin(inputSampleL);
inputSampleR = sin(inputSampleR);
tempSample = (inputSampleR * biquadCR[2]) + biquadCR[7];
biquadCR[7] = (inputSampleR * biquadCR[3]) - (tempSample * biquadCR[5]) + biquadCR[8];
biquadCR[8] = (inputSampleR * biquadCR[4]) - (tempSample * biquadCR[6]);
inputSampleR = tempSample; //interleaved biquad
if (inputSampleR > 1.0) inputSampleR = 1.0;
if (inputSampleR < -1.0) inputSampleR = -1.0;
inputSampleR = asin(inputSampleR);
} else {
iirMidRollerBL = (iirMidRollerBL * (1.0 - RollAmount)) + (inputSampleL * RollAmount);
iirMidRollerBR = (iirMidRollerBR * (1.0 - RollAmount)) + (inputSampleR * RollAmount);
HighsSampleL = inputSampleL - iirMidRollerBL;
HighsSampleR = inputSampleR - iirMidRollerBR;
NonHighsSampleL = iirMidRollerBL;
NonHighsSampleR = iirMidRollerBR;
iirHeadBumpBL += (inputSampleL * 0.05);
iirHeadBumpBR += (inputSampleR * 0.05);
iirHeadBumpBL -= (iirHeadBumpBL * iirHeadBumpBL * iirHeadBumpBL * HeadBumpFreq);
iirHeadBumpBR -= (iirHeadBumpBR * iirHeadBumpBR * iirHeadBumpBR * HeadBumpFreq);
iirHeadBumpBL = sin(iirHeadBumpBL);
iirHeadBumpBR = sin(iirHeadBumpBR);
tempSample = (iirHeadBumpBL * biquadBL[2]) + biquadBL[7];
biquadBL[7] = (iirHeadBumpBL * biquadBL[3]) - (tempSample * biquadBL[5]) + biquadBL[8];
biquadBL[8] = (iirHeadBumpBL * biquadBL[4]) - (tempSample * biquadBL[6]);
iirHeadBumpBL = tempSample; //interleaved biquad
if (iirHeadBumpBL > 1.0) iirHeadBumpBL = 1.0;
if (iirHeadBumpBL < -1.0) iirHeadBumpBL = -1.0;
iirHeadBumpBL = asin(iirHeadBumpBL);
tempSample = (iirHeadBumpBR * biquadBR[2]) + biquadBR[7];
biquadBR[7] = (iirHeadBumpBR * biquadBR[3]) - (tempSample * biquadBR[5]) + biquadBR[8];
biquadBR[8] = (iirHeadBumpBR * biquadBR[4]) - (tempSample * biquadBR[6]);
iirHeadBumpBR = tempSample; //interleaved biquad
if (iirHeadBumpBR > 1.0) iirHeadBumpBR = 1.0;
if (iirHeadBumpBR < -1.0) iirHeadBumpBR = -1.0;
iirHeadBumpBR = asin(iirHeadBumpBR);
inputSampleL = sin(inputSampleL);
tempSample = (inputSampleL * biquadDL[2]) + biquadDL[7];
biquadDL[7] = (inputSampleL * biquadDL[3]) - (tempSample * biquadDL[5]) + biquadDL[8];
biquadDL[8] = (inputSampleL * biquadDL[4]) - (tempSample * biquadDL[6]);
inputSampleL = tempSample; //interleaved biquad
if (inputSampleL > 1.0) inputSampleL = 1.0;
if (inputSampleL < -1.0) inputSampleL = -1.0;
inputSampleL = asin(inputSampleL);
inputSampleR = sin(inputSampleR);
tempSample = (inputSampleR * biquadDR[2]) + biquadDR[7];
biquadDR[7] = (inputSampleR * biquadDR[3]) - (tempSample * biquadDR[5]) + biquadDR[8];
biquadDR[8] = (inputSampleR * biquadDR[4]) - (tempSample * biquadDR[6]);
inputSampleR = tempSample; //interleaved biquad
if (inputSampleR > 1.0) inputSampleR = 1.0;
if (inputSampleR < -1.0) inputSampleR = -1.0;
inputSampleR = asin(inputSampleR);
}
flip = !flip;
double groundSampleL = drySampleL - inputSampleL; //set up UnBox
double groundSampleR = drySampleR - inputSampleR; //set up UnBox
if (inputgain > 1.0) {
inputSampleL *= inputgain;
inputSampleR *= inputgain;
} //gain boost inside UnBox: do not boost fringe audio
double applySoften = fabs(HighsSampleL)*1.57079633;
if (applySoften > 1.57079633) applySoften = 1.57079633;
applySoften = 1-cos(applySoften);
if (HighsSampleL > 0) inputSampleL -= applySoften;
if (HighsSampleL < 0) inputSampleL += applySoften;
//apply Soften depending on polarity
applySoften = fabs(HighsSampleR)*1.57079633;
if (applySoften > 1.57079633) applySoften = 1.57079633;
applySoften = 1-cos(applySoften);
if (HighsSampleR > 0) inputSampleR -= applySoften;
if (HighsSampleR < 0) inputSampleR += applySoften;
//apply Soften depending on polarity
if (inputSampleL > 1.2533141373155) inputSampleL = 1.2533141373155;
if (inputSampleL < -1.2533141373155) inputSampleL = -1.2533141373155;
//clip to 1.2533141373155 to reach maximum output
inputSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((fabs(inputSampleL) == 0.0) ?1:fabs(inputSampleL));
//Spiral, for cleanest most optimal tape effect
if (inputSampleR > 1.2533141373155) inputSampleR = 1.2533141373155;
if (inputSampleR < -1.2533141373155) inputSampleR = -1.2533141373155;
//clip to 1.2533141373155 to reach maximum output
inputSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((fabs(inputSampleR) == 0.0) ?1:fabs(inputSampleR));
//Spiral, for cleanest most optimal tape effect
double suppress = (1.0-fabs(inputSampleL)) * 0.00013;
if (iirHeadBumpAL > suppress) iirHeadBumpAL -= suppress;
if (iirHeadBumpAL < -suppress) iirHeadBumpAL += suppress;
if (iirHeadBumpBL > suppress) iirHeadBumpBL -= suppress;
if (iirHeadBumpBL < -suppress) iirHeadBumpBL += suppress;
//restrain resonant quality of head bump algorithm
suppress = (1.0-fabs(inputSampleR)) * 0.00013;
if (iirHeadBumpAR > suppress) iirHeadBumpAR -= suppress;
if (iirHeadBumpAR < -suppress) iirHeadBumpAR += suppress;
if (iirHeadBumpBR > suppress) iirHeadBumpBR -= suppress;
if (iirHeadBumpBR < -suppress) iirHeadBumpBR += suppress;
//restrain resonant quality of head bump algorithm
inputSampleL += groundSampleL; //apply UnBox processing
inputSampleR += groundSampleR; //apply UnBox processing
inputSampleL += ((iirHeadBumpAL + iirHeadBumpBL) * bumpgain);//and head bump
inputSampleR += ((iirHeadBumpAR + iirHeadBumpBR) * bumpgain);//and head bump
if (lastSampleL >= 0.99)
{
if (inputSampleL < 0.99) lastSampleL = ((0.99*softness) + (inputSampleL * (1.0-softness)));
else lastSampleL = 0.99;
}
if (lastSampleL <= -0.99)
{
if (inputSampleL > -0.99) lastSampleL = ((-0.99*softness) + (inputSampleL * (1.0-softness)));
else lastSampleL = -0.99;
}
if (inputSampleL > 0.99)
{
if (lastSampleL < 0.99) inputSampleL = ((0.99*softness) + (lastSampleL * (1.0-softness)));
else inputSampleL = 0.99;
}
if (inputSampleL < -0.99)
{
if (lastSampleL > -0.99) inputSampleL = ((-0.99*softness) + (lastSampleL * (1.0-softness)));
else inputSampleL = -0.99;
}
lastSampleL = inputSampleL; //end ADClip L
if (lastSampleR >= 0.99)
{
if (inputSampleR < 0.99) lastSampleR = ((0.99*softness) + (inputSampleR * (1.0-softness)));
else lastSampleR = 0.99;
}
if (lastSampleR <= -0.99)
{
if (inputSampleR > -0.99) lastSampleR = ((-0.99*softness) + (inputSampleR * (1.0-softness)));
else lastSampleR = -0.99;
}
if (inputSampleR > 0.99)
{
if (lastSampleR < 0.99) inputSampleR = ((0.99*softness) + (lastSampleR * (1.0-softness)));
else inputSampleR = 0.99;
}
if (inputSampleR < -0.99)
{
if (lastSampleR > -0.99) inputSampleR = ((-0.99*softness) + (lastSampleR * (1.0-softness)));
else inputSampleR = -0.99;
}
lastSampleR = inputSampleR; //end ADClip R
if (inputSampleL > 0.99) inputSampleL = 0.99;
if (inputSampleL < -0.99) inputSampleL = -0.99;
//final iron bar
if (inputSampleR > 0.99) inputSampleR = 0.99;
if (inputSampleR < -0.99) inputSampleR = -0.99;
//final iron bar
//begin 64 bit stereo floating point dither
//int expon; frexp((double)inputSampleL, &expon);
fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
//inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
//frexp((double)inputSampleR, &expon);
fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
//inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
//end 64 bit stereo floating point dither
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
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