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250 lines
9 KiB
C++
Executable file
250 lines
9 KiB
C++
Executable file
/* ========================================
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* Distortion - Distortion.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __Distortion_H
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#include "Distortion.h"
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#endif
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void Distortion::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
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{
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float* in1 = inputs[0];
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float* in2 = inputs[1];
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float* out1 = outputs[0];
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float* out2 = outputs[1];
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int stages = (int)floor(getSampleRate()/25000.0);
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if (stages > 8) stages = 8;
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double input = pow(10.0,((A-0.5)*24.0)/20.0);
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int mode = (int) ( B * 4.999 );
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double output = pow(10.0,((C-0.5)*24.0)/20.0);
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double wet = D;
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
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if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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inputSampleL *= input;
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inputSampleR *= input;
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for (int x = 0; x < stages; x++) {
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double temp;
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temp = (inputSampleL+previousInL[x])*0.5;
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previousInL[x] = inputSampleL;
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inputSampleL = temp;
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temp = (inputSampleR+previousInR[x])*0.5;
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previousInR[x] = inputSampleR;
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inputSampleR = temp;
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}
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switch (mode)
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{
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case 0: //Density
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if (inputSampleL > 1.570796326794897) inputSampleL = 1.570796326794897;
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if (inputSampleL < -1.570796326794897) inputSampleL = -1.570796326794897;
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if (inputSampleR > 1.570796326794897) inputSampleR = 1.570796326794897;
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if (inputSampleR < -1.570796326794897) inputSampleR = -1.570796326794897;
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//clip to 1.570796326794897 to reach maximum output
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inputSampleL = sin(inputSampleL);
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inputSampleR = sin(inputSampleR);
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break;
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case 1: //Drive
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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inputSampleL -= (inputSampleL * (fabs(inputSampleL) * 0.6) * (fabs(inputSampleL) * 0.6));
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inputSampleR -= (inputSampleR * (fabs(inputSampleR) * 0.6) * (fabs(inputSampleR) * 0.6));
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inputSampleL *= 1.5;
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inputSampleR *= 1.5;
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break;
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case 2: //Spiral
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if (inputSampleL > 1.2533141373155) inputSampleL = 1.2533141373155;
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if (inputSampleL < -1.2533141373155) inputSampleL = -1.2533141373155;
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if (inputSampleR > 1.2533141373155) inputSampleR = 1.2533141373155;
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if (inputSampleR < -1.2533141373155) inputSampleR = -1.2533141373155;
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//clip to 1.2533141373155 to reach maximum output
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inputSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((fabs(inputSampleL) == 0.0) ?1:fabs(inputSampleL));
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inputSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((fabs(inputSampleR) == 0.0) ?1:fabs(inputSampleR));
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break;
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case 3: //Mojo
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double mojo; mojo = pow(fabs(inputSampleL),0.25);
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if (mojo > 0.0) inputSampleL = (sin(inputSampleL * mojo * M_PI * 0.5) / mojo) * 0.987654321;
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mojo = pow(fabs(inputSampleR),0.25);
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if (mojo > 0.0) inputSampleR = (sin(inputSampleR * mojo * M_PI * 0.5) / mojo) * 0.987654321;
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//mojo is the one that flattens WAAAAY out very softly before wavefolding
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break;
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case 4: //Dyno
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double dyno; dyno = pow(fabs(inputSampleL),4);
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if (dyno > 0.0) inputSampleL = (sin(inputSampleL * dyno) / dyno) * 1.1654321;
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dyno = pow(fabs(inputSampleR),4);
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if (dyno > 0.0) inputSampleR = (sin(inputSampleR * dyno) / dyno) * 1.1654321;
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//dyno is the one that tries to raise peak energy
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break;
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}
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for (int x = 1; x < (stages/2); x++) {
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double temp;
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temp = (inputSampleL+previousOutL[x])*0.5;
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previousOutL[x] = inputSampleL;
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inputSampleL = temp;
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temp = (inputSampleR+previousOutR[x])*0.5;
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previousOutR[x] = inputSampleR;
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inputSampleR = temp;
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}
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if (output != 1.0) {
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inputSampleL *= output;
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inputSampleR *= output;
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}
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if (wet !=1.0) {
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inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
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inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
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}
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//begin 32 bit stereo floating point dither
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int expon; frexpf((float)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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frexpf((float)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 32 bit stereo floating point dither
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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*in1++;
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*in2++;
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*out1++;
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*out2++;
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}
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}
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void Distortion::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
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{
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double* in1 = inputs[0];
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double* in2 = inputs[1];
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double* out1 = outputs[0];
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double* out2 = outputs[1];
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int stages = (int)floor(getSampleRate()/25000.0);
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if (stages > 8) stages = 8;
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double input = pow(10.0,((A-0.5)*24.0)/20.0);
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int mode = (int) ( B * 4.999 );
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double output = pow(10.0,((C-0.5)*24.0)/20.0);
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double wet = D;
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
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if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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inputSampleL *= input;
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inputSampleR *= input;
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for (int x = 0; x < stages; x++) {
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double temp;
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temp = (inputSampleL+previousInL[x])*0.5;
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previousInL[x] = inputSampleL;
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inputSampleL = temp;
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temp = (inputSampleR+previousInR[x])*0.5;
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previousInR[x] = inputSampleR;
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inputSampleR = temp;
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}
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switch (mode)
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{
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case 0: //Density
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if (inputSampleL > 1.570796326794897) inputSampleL = 1.570796326794897;
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if (inputSampleL < -1.570796326794897) inputSampleL = -1.570796326794897;
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if (inputSampleR > 1.570796326794897) inputSampleR = 1.570796326794897;
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if (inputSampleR < -1.570796326794897) inputSampleR = -1.570796326794897;
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//clip to 1.570796326794897 to reach maximum output
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inputSampleL = sin(inputSampleL);
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inputSampleR = sin(inputSampleR);
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break;
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case 1: //Drive
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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inputSampleL -= (inputSampleL * (fabs(inputSampleL) * 0.6) * (fabs(inputSampleL) * 0.6));
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inputSampleR -= (inputSampleR * (fabs(inputSampleR) * 0.6) * (fabs(inputSampleR) * 0.6));
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inputSampleL *= 1.5;
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inputSampleR *= 1.5;
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break;
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case 2: //Spiral
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if (inputSampleL > 1.2533141373155) inputSampleL = 1.2533141373155;
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if (inputSampleL < -1.2533141373155) inputSampleL = -1.2533141373155;
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if (inputSampleR > 1.2533141373155) inputSampleR = 1.2533141373155;
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if (inputSampleR < -1.2533141373155) inputSampleR = -1.2533141373155;
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//clip to 1.2533141373155 to reach maximum output
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inputSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((fabs(inputSampleL) == 0.0) ?1:fabs(inputSampleL));
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inputSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((fabs(inputSampleR) == 0.0) ?1:fabs(inputSampleR));
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break;
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case 3: //Mojo
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double mojo; mojo = pow(fabs(inputSampleL),0.25);
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if (mojo > 0.0) inputSampleL = (sin(inputSampleL * mojo * M_PI * 0.5) / mojo) * 0.987654321;
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mojo = pow(fabs(inputSampleR),0.25);
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if (mojo > 0.0) inputSampleR = (sin(inputSampleR * mojo * M_PI * 0.5) / mojo) * 0.987654321;
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//mojo is the one that flattens WAAAAY out very softly before wavefolding
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break;
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case 4: //Dyno
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double dyno; dyno = pow(fabs(inputSampleL),4);
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if (dyno > 0.0) inputSampleL = (sin(inputSampleL * dyno) / dyno) * 1.1654321;
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dyno = pow(fabs(inputSampleR),4);
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if (dyno > 0.0) inputSampleR = (sin(inputSampleR * dyno) / dyno) * 1.1654321;
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//dyno is the one that tries to raise peak energy
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break;
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}
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for (int x = 1; x < (stages/2); x++) {
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double temp;
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temp = (inputSampleL+previousOutL[x])*0.5;
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previousOutL[x] = inputSampleL;
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inputSampleL = temp;
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temp = (inputSampleR+previousOutR[x])*0.5;
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previousOutR[x] = inputSampleR;
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inputSampleR = temp;
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}
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if (output != 1.0) {
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inputSampleL *= output;
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inputSampleR *= output;
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}
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if (wet !=1.0) {
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inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
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inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
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}
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//begin 64 bit stereo floating point dither
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//int expon; frexp((double)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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//inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
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//frexp((double)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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//inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
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//end 64 bit stereo floating point dither
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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*in1++;
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*in2++;
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*out1++;
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*out2++;
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}
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}
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