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668 lines
No EOL
35 KiB
C++
Executable file
668 lines
No EOL
35 KiB
C++
Executable file
/* ========================================
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* ToTape5 - ToTape5.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __ToTape5_H
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#include "ToTape5.h"
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#endif
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void ToTape5::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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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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double fpOld = 0.618033988749894848204586; //golden ratio!
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double inputgain = pow(A+1.0,3);
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double outputgain = E;
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double wet = F;
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//removed extra dry variable
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double trim = 0.211324865405187117745425;
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double SoftenControl = pow(B,2);
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double tempRandy = 0.06 + (SoftenControl/10.0);
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double RollAmount = (1.0-(SoftenControl * 0.45))/overallscale;
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double HeadBumpControl = pow(C,2);
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int allpasstemp;
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int maxdelay = (int)(floor(((HeadBumpControl+0.3)*2.2)*overallscale));
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HeadBumpControl *= fabs(HeadBumpControl);
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double HeadBumpFreq = 0.044/overallscale;
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double iirAmount = 0.000001/overallscale;
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double altAmount = 1.0 - iirAmount;
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double iirHBoostAmount = 0.0001/overallscale;
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double altHBoostAmount = 1.0 - iirAmount;
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double depth = pow(D,2)*overallscale;
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double fluttertrim = 0.005/overallscale;
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double sweeptrim = (0.0006*depth)/overallscale;
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double offset;
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double tupi = 3.141592653589793238 * 2.0;
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double newrate = 0.005/overallscale;
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double oldrate = 1.0-newrate;
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double flutterrandy;
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double randy;
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double invrandy;
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int count;
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double HighsSampleL = 0.0;
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double NonHighsSampleL = 0.0;
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double HeadBumpL = 0.0;
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double SubtractL;
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double bridgerectifierL;
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double tempSampleL;
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double drySampleL;
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double HighsSampleR = 0.0;
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double NonHighsSampleR = 0.0;
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double HeadBumpR = 0.0;
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double SubtractR;
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double bridgerectifierR;
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double tempSampleR;
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double drySampleR;
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double inputSampleL;
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double inputSampleR;
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while (--sampleFrames >= 0)
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{
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inputSampleL = *in1;
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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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drySampleL = inputSampleL;
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drySampleR = inputSampleR;
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flutterrandy = (double(fpdL)/UINT32_MAX);
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randy = flutterrandy * tempRandy; //for soften
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invrandy = (1.0-randy);
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randy /= 2.0;
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//we've set up so that we dial in the amount of the alt sections (in pairs) with invrandy being the source section
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//now we've got a random flutter, so we're messing with the pitch before tape effects go on
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if (gcount < 0 || gcount > 300) {gcount = 300;}
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count = gcount;
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dL[count+301] = dL[count] = inputSampleL;
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dR[count+301] = dR[count] = inputSampleR;
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gcount--;
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//we will also keep the buffer going, even when not in use
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if (depth != 0.0) {
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offset = (1.0 + sin(sweep)) * depth;
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count += (int)floor(offset);
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bridgerectifierL = (dL[count] * (1-(offset-floor(offset))));
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bridgerectifierL += (dL[count+1] * (offset-floor(offset)));
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bridgerectifierL -= ((dL[count+2] * (offset-floor(offset)))*trim);
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bridgerectifierR = (dR[count] * (1-(offset-floor(offset))));
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bridgerectifierR += (dR[count+1] * (offset-floor(offset)));
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bridgerectifierR -= ((dR[count+2] * (offset-floor(offset)))*trim);
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rateof = (nextmax * newrate) + (rateof * oldrate);
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sweep += rateof * fluttertrim;
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sweep += sweep * sweeptrim;
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if (sweep >= tupi){sweep = 0.0; nextmax = 0.02 + (flutterrandy*0.98);}
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inputSampleL = bridgerectifierL;
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inputSampleR = bridgerectifierR;
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//apply to input signal only when flutter is present, interpolate samples
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}
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if (inputgain != 1.0) {
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inputSampleL *= inputgain;
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inputSampleR *= inputgain;
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}
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if (flip < 1 || flip > 3) flip = 1;
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switch (flip)
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{
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case 1:
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iirMidRollerAL = (iirMidRollerAL * (1.0 - RollAmount)) + (inputSampleL * RollAmount);
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iirMidRollerAL = (invrandy * iirMidRollerAL) + (randy * iirMidRollerBL) + (randy * iirMidRollerCL);
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HighsSampleL = inputSampleL - iirMidRollerAL;
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NonHighsSampleL = iirMidRollerAL;
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iirHeadBumpAL += (inputSampleL * 0.05);
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iirHeadBumpAL -= (iirHeadBumpAL * iirHeadBumpAL * iirHeadBumpAL * HeadBumpFreq);
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iirHeadBumpAL = (invrandy * iirHeadBumpAL) + (randy * iirHeadBumpBL) + (randy * iirHeadBumpCL);
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iirMidRollerAR = (iirMidRollerAR * (1.0 - RollAmount)) + (inputSampleR * RollAmount);
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iirMidRollerAR = (invrandy * iirMidRollerAR) + (randy * iirMidRollerBR) + (randy * iirMidRollerCR);
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HighsSampleR = inputSampleR - iirMidRollerAR;
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NonHighsSampleR = iirMidRollerAR;
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iirHeadBumpAR += (inputSampleR * 0.05);
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iirHeadBumpAR -= (iirHeadBumpAR * iirHeadBumpAR * iirHeadBumpAR * HeadBumpFreq);
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iirHeadBumpAR = (invrandy * iirHeadBumpAR) + (randy * iirHeadBumpBR) + (randy * iirHeadBumpCR);
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break;
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case 2:
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iirMidRollerBL = (iirMidRollerBL * (1.0 - RollAmount)) + (inputSampleL * RollAmount);
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iirMidRollerBL = (randy * iirMidRollerAL) + (invrandy * iirMidRollerBL) + (randy * iirMidRollerCL);
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HighsSampleL = inputSampleL - iirMidRollerBL;
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NonHighsSampleL = iirMidRollerBL;
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iirHeadBumpBL += (inputSampleL * 0.05);
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iirHeadBumpBL -= (iirHeadBumpBL * iirHeadBumpBL * iirHeadBumpBL * HeadBumpFreq);
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iirHeadBumpBL = (randy * iirHeadBumpAL) + (invrandy * iirHeadBumpBL) + (randy * iirHeadBumpCL);
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iirMidRollerBR = (iirMidRollerBR * (1.0 - RollAmount)) + (inputSampleR * RollAmount);
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iirMidRollerBR = (randy * iirMidRollerAR) + (invrandy * iirMidRollerBR) + (randy * iirMidRollerCR);
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HighsSampleR = inputSampleR - iirMidRollerBR;
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NonHighsSampleR = iirMidRollerBR;
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iirHeadBumpBR += (inputSampleR * 0.05);
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iirHeadBumpBR -= (iirHeadBumpBR * iirHeadBumpBR * iirHeadBumpBR * HeadBumpFreq);
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iirHeadBumpBR = (randy * iirHeadBumpAR) + (invrandy * iirHeadBumpBR) + (randy * iirHeadBumpCR);
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break;
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case 3:
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iirMidRollerCL = (iirMidRollerCL * (1.0 - RollAmount)) + (inputSampleL * RollAmount);
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iirMidRollerCL = (randy * iirMidRollerAL) + (randy * iirMidRollerBL) + (invrandy * iirMidRollerCL);
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HighsSampleL = inputSampleL - iirMidRollerCL;
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NonHighsSampleL = iirMidRollerCL;
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iirHeadBumpCL += (inputSampleL * 0.05);
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iirHeadBumpCL -= (iirHeadBumpCL * iirHeadBumpCL * iirHeadBumpCL * HeadBumpFreq);
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iirHeadBumpCL = (randy * iirHeadBumpAL) + (randy * iirHeadBumpBL) + (invrandy * iirHeadBumpCL);
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iirMidRollerCR = (iirMidRollerCR * (1.0 - RollAmount)) + (inputSampleR * RollAmount);
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iirMidRollerCR = (randy * iirMidRollerAR) + (randy * iirMidRollerBR) + (invrandy * iirMidRollerCR);
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HighsSampleR = inputSampleR - iirMidRollerCR;
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NonHighsSampleR = iirMidRollerCR;
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iirHeadBumpCR += (inputSampleR * 0.05);
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iirHeadBumpCR -= (iirHeadBumpCR * iirHeadBumpCR * iirHeadBumpCR * HeadBumpFreq);
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iirHeadBumpCR = (randy * iirHeadBumpAR) + (randy * iirHeadBumpBR) + (invrandy * iirHeadBumpCR);
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break;
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}
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flip++; //increment the triplet counter
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SubtractL = HighsSampleL;
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bridgerectifierL = fabs(SubtractL)*1.57079633;
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if (bridgerectifierL > 1.57079633) bridgerectifierL = 1.57079633;
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bridgerectifierL = 1-cos(bridgerectifierL);
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if (SubtractL > 0) SubtractL = bridgerectifierL;
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if (SubtractL < 0) SubtractL = -bridgerectifierL;
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inputSampleL -= SubtractL;
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SubtractR = HighsSampleR;
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bridgerectifierR = fabs(SubtractR)*1.57079633;
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if (bridgerectifierR > 1.57079633) bridgerectifierR = 1.57079633;
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bridgerectifierR = 1-cos(bridgerectifierR);
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if (SubtractR > 0) SubtractR = bridgerectifierR;
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if (SubtractR < 0) SubtractR = -bridgerectifierR;
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inputSampleR -= SubtractR;
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//Soften works using the MidRoller stuff, defining a bright parallel channel that we apply negative Density
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//to, and then subtract from the main audio. That makes the 'highs channel subtract' hit only the loudest
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//transients, plus we are subtracting any artifacts we got from the negative Density.
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bridgerectifierL = fabs(inputSampleL);
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if (bridgerectifierL > 1.57079633) bridgerectifierL = 1.57079633;
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bridgerectifierL = sin(bridgerectifierL);
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if (inputSampleL > 0) inputSampleL = bridgerectifierL;
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if (inputSampleL < 0) inputSampleL = -bridgerectifierL;
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bridgerectifierR = fabs(inputSampleR);
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if (bridgerectifierR > 1.57079633) bridgerectifierR = 1.57079633;
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bridgerectifierR = sin(bridgerectifierR);
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if (inputSampleR > 0) inputSampleR = bridgerectifierR;
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if (inputSampleR < 0) inputSampleR = -bridgerectifierR;
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//drive section: the tape sound includes a very gentle saturation curve, which is always an attenuation.
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//we cut back on highs before hitting this, and then we're going to subtract highs a second time after.
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HeadBumpL = iirHeadBumpAL + iirHeadBumpBL + iirHeadBumpCL;
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HeadBumpR = iirHeadBumpAR + iirHeadBumpBR + iirHeadBumpCR;
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//begin PhaseNudge
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allpasstemp = hcount - 1;
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if (allpasstemp < 0 || allpasstemp > maxdelay) {allpasstemp = maxdelay;}
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HeadBumpL -= eL[allpasstemp] * fpOld;
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eL[hcount] = HeadBumpL;
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inputSampleL *= fpOld;
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HeadBumpR -= eR[allpasstemp] * fpOld;
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eR[hcount] = HeadBumpR;
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inputSampleR *= fpOld;
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hcount--; if (hcount < 0 || hcount > maxdelay) {hcount = maxdelay;}
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HeadBumpL += (eL[hcount]);
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HeadBumpR += (eR[hcount]);
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//end PhaseNudge on head bump in lieu of delay.
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SubtractL -= (HeadBumpL * (HeadBumpControl+iirMinHeadBumpL));
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SubtractR -= (HeadBumpR * (HeadBumpControl+iirMinHeadBumpR));
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//makes a second soften and a single head bump after saturation.
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//we are going to retain this, and then feed it into the highpass filter. That way, we can skip a subtract.
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//Head Bump retains a trace which is roughly as large as what the highpass will do.
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tempSampleL = inputSampleL;
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tempSampleR = inputSampleR;
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iirMinHeadBumpL = (iirMinHeadBumpL * altHBoostAmount) + (fabs(inputSampleL) * iirHBoostAmount);
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if (iirMinHeadBumpL > 0.01) iirMinHeadBumpL = 0.01;
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iirMinHeadBumpR = (iirMinHeadBumpR * altHBoostAmount) + (fabs(inputSampleR) * iirHBoostAmount);
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if (iirMinHeadBumpR > 0.01) iirMinHeadBumpR = 0.01;
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//we want this one rectified so that it's a relatively steady positive value. Boosts can cause it to be
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//greater than 1 so we clamp it in that case.
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iirSampleAL = (iirSampleAL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleAL; SubtractL += iirSampleAL;
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iirSampleBL = (iirSampleBL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleBL; SubtractL += iirSampleBL;
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iirSampleCL = (iirSampleCL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleCL; SubtractL += iirSampleCL;
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iirSampleDL = (iirSampleDL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleDL; SubtractL += iirSampleDL;
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iirSampleEL = (iirSampleEL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleEL; SubtractL += iirSampleEL;
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iirSampleFL = (iirSampleFL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleFL; SubtractL += iirSampleFL;
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iirSampleGL = (iirSampleGL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleGL; SubtractL += iirSampleGL;
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iirSampleHL = (iirSampleHL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleHL; SubtractL += iirSampleHL;
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iirSampleIL = (iirSampleIL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleIL; SubtractL += iirSampleIL;
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iirSampleJL = (iirSampleJL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleJL; SubtractL += iirSampleJL;
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iirSampleKL = (iirSampleKL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleKL; SubtractL += iirSampleKL;
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iirSampleLL = (iirSampleLL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleLL; SubtractL += iirSampleLL;
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iirSampleML = (iirSampleML * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleML; SubtractL += iirSampleML;
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iirSampleNL = (iirSampleNL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleNL; SubtractL += iirSampleNL;
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iirSampleOL = (iirSampleOL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleOL; SubtractL += iirSampleOL;
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iirSamplePL = (iirSamplePL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSamplePL; SubtractL += iirSamplePL;
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iirSampleQL = (iirSampleQL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleQL; SubtractL += iirSampleQL;
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iirSampleRL = (iirSampleRL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleRL; SubtractL += iirSampleRL;
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iirSampleSL = (iirSampleSL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleSL; SubtractL += iirSampleSL;
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iirSampleTL = (iirSampleTL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleTL; SubtractL += iirSampleTL;
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iirSampleUL = (iirSampleUL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleUL; SubtractL += iirSampleUL;
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iirSampleVL = (iirSampleVL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleVL; SubtractL += iirSampleVL;
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iirSampleWL = (iirSampleWL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleWL; SubtractL += iirSampleWL;
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iirSampleXL = (iirSampleXL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleXL; SubtractL += iirSampleXL;
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iirSampleYL = (iirSampleYL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleYL; SubtractL += iirSampleYL;
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iirSampleZL = (iirSampleZL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleZL; SubtractL += iirSampleZL;
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iirSampleAR = (iirSampleAR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleAR; SubtractR += iirSampleAR;
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iirSampleBR = (iirSampleBR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleBR; SubtractR += iirSampleBR;
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iirSampleCR = (iirSampleCR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleCR; SubtractR += iirSampleCR;
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iirSampleDR = (iirSampleDR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleDR; SubtractR += iirSampleDR;
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iirSampleER = (iirSampleER * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleER; SubtractR += iirSampleER;
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iirSampleFR = (iirSampleFR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleFR; SubtractR += iirSampleFR;
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iirSampleGR = (iirSampleGR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleGR; SubtractR += iirSampleGR;
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iirSampleHR = (iirSampleHR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleHR; SubtractR += iirSampleHR;
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iirSampleIR = (iirSampleIR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleIR; SubtractR += iirSampleIR;
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iirSampleJR = (iirSampleJR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleJR; SubtractR += iirSampleJR;
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iirSampleKR = (iirSampleKR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleKR; SubtractR += iirSampleKR;
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iirSampleLR = (iirSampleLR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleLR; SubtractR += iirSampleLR;
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iirSampleMR = (iirSampleMR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleMR; SubtractR += iirSampleMR;
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iirSampleNR = (iirSampleNR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleNR; SubtractR += iirSampleNR;
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iirSampleOR = (iirSampleOR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleOR; SubtractR += iirSampleOR;
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iirSamplePR = (iirSamplePR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSamplePR; SubtractR += iirSamplePR;
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iirSampleQR = (iirSampleQR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleQR; SubtractR += iirSampleQR;
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iirSampleRR = (iirSampleRR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleRR; SubtractR += iirSampleRR;
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iirSampleSR = (iirSampleSR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleSR; SubtractR += iirSampleSR;
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iirSampleTR = (iirSampleTR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleTR; SubtractR += iirSampleTR;
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iirSampleUR = (iirSampleUR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleUR; SubtractR += iirSampleUR;
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iirSampleVR = (iirSampleVR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleVR; SubtractR += iirSampleVR;
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iirSampleWR = (iirSampleWR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleWR; SubtractR += iirSampleWR;
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iirSampleXR = (iirSampleXR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleXR; SubtractR += iirSampleXR;
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iirSampleYR = (iirSampleYR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleYR; SubtractR += iirSampleYR;
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iirSampleZR = (iirSampleZR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleZR; SubtractR += iirSampleZR;
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//do the IIR on a dummy sample, and store up the correction in a variable at the same scale as the very low level
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//numbers being used. Don't keep doing it against the possibly high level signal number.
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//This has been known to add a resonant quality to the cutoff, which we're using on purpose.
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inputSampleL -= SubtractL;
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inputSampleR -= SubtractR;
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//apply stored up tiny corrections.
|
|
|
|
if (outputgain != 1.0) {
|
|
inputSampleL *= outputgain;
|
|
inputSampleR *= outputgain;
|
|
}
|
|
|
|
if (wet !=1.0) {
|
|
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
|
|
|
|
*out1 = inputSampleL;
|
|
*out2 = inputSampleR;
|
|
|
|
*in1++;
|
|
*in2++;
|
|
*out1++;
|
|
*out2++;
|
|
}
|
|
}
|
|
|
|
void ToTape5::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 fpOld = 0.618033988749894848204586; //golden ratio!
|
|
double inputgain = pow(A+1.0,3);
|
|
double outputgain = E;
|
|
double wet = F;
|
|
//removed extra dry variable
|
|
double trim = 0.211324865405187117745425;
|
|
double SoftenControl = pow(B,2);
|
|
double tempRandy = 0.06 + (SoftenControl/10.0);
|
|
double RollAmount = (1.0-(SoftenControl * 0.45))/overallscale;
|
|
double HeadBumpControl = pow(C,2);
|
|
int allpasstemp;
|
|
int maxdelay = (int)(floor(((HeadBumpControl+0.3)*2.2)*overallscale));
|
|
HeadBumpControl *= fabs(HeadBumpControl);
|
|
double HeadBumpFreq = 0.044/overallscale;
|
|
double iirAmount = 0.000001/overallscale;
|
|
double altAmount = 1.0 - iirAmount;
|
|
double iirHBoostAmount = 0.0001/overallscale;
|
|
double altHBoostAmount = 1.0 - iirAmount;
|
|
double depth = pow(D,2)*overallscale;
|
|
double fluttertrim = 0.005/overallscale;
|
|
double sweeptrim = (0.0006*depth)/overallscale;
|
|
double offset;
|
|
double tupi = 3.141592653589793238 * 2.0;
|
|
double newrate = 0.005/overallscale;
|
|
double oldrate = 1.0-newrate;
|
|
double flutterrandy;
|
|
double randy;
|
|
double invrandy;
|
|
int count;
|
|
|
|
double HighsSampleL = 0.0;
|
|
double NonHighsSampleL = 0.0;
|
|
double HeadBumpL = 0.0;
|
|
double SubtractL;
|
|
double bridgerectifierL;
|
|
double tempSampleL;
|
|
double drySampleL;
|
|
|
|
double HighsSampleR = 0.0;
|
|
double NonHighsSampleR = 0.0;
|
|
double HeadBumpR = 0.0;
|
|
double SubtractR;
|
|
double bridgerectifierR;
|
|
double tempSampleR;
|
|
double drySampleR;
|
|
double inputSampleL;
|
|
double inputSampleR;
|
|
|
|
while (--sampleFrames >= 0)
|
|
{
|
|
inputSampleL = *in1;
|
|
inputSampleR = *in2;
|
|
if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
|
|
if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
|
|
drySampleL = inputSampleL;
|
|
drySampleR = inputSampleR;
|
|
|
|
|
|
flutterrandy = (double(fpdL)/UINT32_MAX);
|
|
randy = flutterrandy * tempRandy; //for soften
|
|
invrandy = (1.0-randy);
|
|
randy /= 2.0;
|
|
//we've set up so that we dial in the amount of the alt sections (in pairs) with invrandy being the source section
|
|
|
|
//now we've got a random flutter, so we're messing with the pitch before tape effects go on
|
|
if (gcount < 0 || gcount > 300) {gcount = 300;}
|
|
count = gcount;
|
|
dL[count+301] = dL[count] = inputSampleL;
|
|
dR[count+301] = dR[count] = inputSampleR;
|
|
gcount--;
|
|
//we will also keep the buffer going, even when not in use
|
|
|
|
if (depth != 0.0) {
|
|
offset = (1.0 + sin(sweep)) * depth;
|
|
count += (int)floor(offset);
|
|
|
|
bridgerectifierL = (dL[count] * (1-(offset-floor(offset))));
|
|
bridgerectifierL += (dL[count+1] * (offset-floor(offset)));
|
|
bridgerectifierL -= ((dL[count+2] * (offset-floor(offset)))*trim);
|
|
|
|
bridgerectifierR = (dR[count] * (1-(offset-floor(offset))));
|
|
bridgerectifierR += (dR[count+1] * (offset-floor(offset)));
|
|
bridgerectifierR -= ((dR[count+2] * (offset-floor(offset)))*trim);
|
|
|
|
rateof = (nextmax * newrate) + (rateof * oldrate);
|
|
sweep += rateof * fluttertrim;
|
|
sweep += sweep * sweeptrim;
|
|
if (sweep >= tupi){sweep = 0.0; nextmax = 0.02 + (flutterrandy*0.98);}
|
|
inputSampleL = bridgerectifierL;
|
|
inputSampleR = bridgerectifierR;
|
|
//apply to input signal only when flutter is present, interpolate samples
|
|
}
|
|
|
|
if (inputgain != 1.0) {
|
|
inputSampleL *= inputgain;
|
|
inputSampleR *= inputgain;
|
|
}
|
|
|
|
if (flip < 1 || flip > 3) flip = 1;
|
|
switch (flip)
|
|
{
|
|
case 1:
|
|
iirMidRollerAL = (iirMidRollerAL * (1.0 - RollAmount)) + (inputSampleL * RollAmount);
|
|
iirMidRollerAL = (invrandy * iirMidRollerAL) + (randy * iirMidRollerBL) + (randy * iirMidRollerCL);
|
|
HighsSampleL = inputSampleL - iirMidRollerAL;
|
|
NonHighsSampleL = iirMidRollerAL;
|
|
|
|
iirHeadBumpAL += (inputSampleL * 0.05);
|
|
iirHeadBumpAL -= (iirHeadBumpAL * iirHeadBumpAL * iirHeadBumpAL * HeadBumpFreq);
|
|
iirHeadBumpAL = (invrandy * iirHeadBumpAL) + (randy * iirHeadBumpBL) + (randy * iirHeadBumpCL);
|
|
|
|
iirMidRollerAR = (iirMidRollerAR * (1.0 - RollAmount)) + (inputSampleR * RollAmount);
|
|
iirMidRollerAR = (invrandy * iirMidRollerAR) + (randy * iirMidRollerBR) + (randy * iirMidRollerCR);
|
|
HighsSampleR = inputSampleR - iirMidRollerAR;
|
|
NonHighsSampleR = iirMidRollerAR;
|
|
|
|
iirHeadBumpAR += (inputSampleR * 0.05);
|
|
iirHeadBumpAR -= (iirHeadBumpAR * iirHeadBumpAR * iirHeadBumpAR * HeadBumpFreq);
|
|
iirHeadBumpAR = (invrandy * iirHeadBumpAR) + (randy * iirHeadBumpBR) + (randy * iirHeadBumpCR);
|
|
break;
|
|
case 2:
|
|
iirMidRollerBL = (iirMidRollerBL * (1.0 - RollAmount)) + (inputSampleL * RollAmount);
|
|
iirMidRollerBL = (randy * iirMidRollerAL) + (invrandy * iirMidRollerBL) + (randy * iirMidRollerCL);
|
|
HighsSampleL = inputSampleL - iirMidRollerBL;
|
|
NonHighsSampleL = iirMidRollerBL;
|
|
|
|
iirHeadBumpBL += (inputSampleL * 0.05);
|
|
iirHeadBumpBL -= (iirHeadBumpBL * iirHeadBumpBL * iirHeadBumpBL * HeadBumpFreq);
|
|
iirHeadBumpBL = (randy * iirHeadBumpAL) + (invrandy * iirHeadBumpBL) + (randy * iirHeadBumpCL);
|
|
|
|
iirMidRollerBR = (iirMidRollerBR * (1.0 - RollAmount)) + (inputSampleR * RollAmount);
|
|
iirMidRollerBR = (randy * iirMidRollerAR) + (invrandy * iirMidRollerBR) + (randy * iirMidRollerCR);
|
|
HighsSampleR = inputSampleR - iirMidRollerBR;
|
|
NonHighsSampleR = iirMidRollerBR;
|
|
|
|
iirHeadBumpBR += (inputSampleR * 0.05);
|
|
iirHeadBumpBR -= (iirHeadBumpBR * iirHeadBumpBR * iirHeadBumpBR * HeadBumpFreq);
|
|
iirHeadBumpBR = (randy * iirHeadBumpAR) + (invrandy * iirHeadBumpBR) + (randy * iirHeadBumpCR);
|
|
break;
|
|
case 3:
|
|
iirMidRollerCL = (iirMidRollerCL * (1.0 - RollAmount)) + (inputSampleL * RollAmount);
|
|
iirMidRollerCL = (randy * iirMidRollerAL) + (randy * iirMidRollerBL) + (invrandy * iirMidRollerCL);
|
|
HighsSampleL = inputSampleL - iirMidRollerCL;
|
|
NonHighsSampleL = iirMidRollerCL;
|
|
|
|
iirHeadBumpCL += (inputSampleL * 0.05);
|
|
iirHeadBumpCL -= (iirHeadBumpCL * iirHeadBumpCL * iirHeadBumpCL * HeadBumpFreq);
|
|
iirHeadBumpCL = (randy * iirHeadBumpAL) + (randy * iirHeadBumpBL) + (invrandy * iirHeadBumpCL);
|
|
|
|
iirMidRollerCR = (iirMidRollerCR * (1.0 - RollAmount)) + (inputSampleR * RollAmount);
|
|
iirMidRollerCR = (randy * iirMidRollerAR) + (randy * iirMidRollerBR) + (invrandy * iirMidRollerCR);
|
|
HighsSampleR = inputSampleR - iirMidRollerCR;
|
|
NonHighsSampleR = iirMidRollerCR;
|
|
|
|
iirHeadBumpCR += (inputSampleR * 0.05);
|
|
iirHeadBumpCR -= (iirHeadBumpCR * iirHeadBumpCR * iirHeadBumpCR * HeadBumpFreq);
|
|
iirHeadBumpCR = (randy * iirHeadBumpAR) + (randy * iirHeadBumpBR) + (invrandy * iirHeadBumpCR);
|
|
break;
|
|
}
|
|
flip++; //increment the triplet counter
|
|
|
|
SubtractL = HighsSampleL;
|
|
bridgerectifierL = fabs(SubtractL)*1.57079633;
|
|
if (bridgerectifierL > 1.57079633) bridgerectifierL = 1.57079633;
|
|
bridgerectifierL = 1-cos(bridgerectifierL);
|
|
if (SubtractL > 0) SubtractL = bridgerectifierL;
|
|
if (SubtractL < 0) SubtractL = -bridgerectifierL;
|
|
inputSampleL -= SubtractL;
|
|
|
|
SubtractR = HighsSampleR;
|
|
bridgerectifierR = fabs(SubtractR)*1.57079633;
|
|
if (bridgerectifierR > 1.57079633) bridgerectifierR = 1.57079633;
|
|
bridgerectifierR = 1-cos(bridgerectifierR);
|
|
if (SubtractR > 0) SubtractR = bridgerectifierR;
|
|
if (SubtractR < 0) SubtractR = -bridgerectifierR;
|
|
inputSampleR -= SubtractR;
|
|
//Soften works using the MidRoller stuff, defining a bright parallel channel that we apply negative Density
|
|
//to, and then subtract from the main audio. That makes the 'highs channel subtract' hit only the loudest
|
|
//transients, plus we are subtracting any artifacts we got from the negative Density.
|
|
|
|
bridgerectifierL = fabs(inputSampleL);
|
|
if (bridgerectifierL > 1.57079633) bridgerectifierL = 1.57079633;
|
|
bridgerectifierL = sin(bridgerectifierL);
|
|
if (inputSampleL > 0) inputSampleL = bridgerectifierL;
|
|
if (inputSampleL < 0) inputSampleL = -bridgerectifierL;
|
|
|
|
bridgerectifierR = fabs(inputSampleR);
|
|
if (bridgerectifierR > 1.57079633) bridgerectifierR = 1.57079633;
|
|
bridgerectifierR = sin(bridgerectifierR);
|
|
if (inputSampleR > 0) inputSampleR = bridgerectifierR;
|
|
if (inputSampleR < 0) inputSampleR = -bridgerectifierR;
|
|
//drive section: the tape sound includes a very gentle saturation curve, which is always an attenuation.
|
|
//we cut back on highs before hitting this, and then we're going to subtract highs a second time after.
|
|
|
|
HeadBumpL = iirHeadBumpAL + iirHeadBumpBL + iirHeadBumpCL;
|
|
HeadBumpR = iirHeadBumpAR + iirHeadBumpBR + iirHeadBumpCR;
|
|
//begin PhaseNudge
|
|
allpasstemp = hcount - 1;
|
|
if (allpasstemp < 0 || allpasstemp > maxdelay) {allpasstemp = maxdelay;}
|
|
|
|
HeadBumpL -= eL[allpasstemp] * fpOld;
|
|
eL[hcount] = HeadBumpL;
|
|
inputSampleL *= fpOld;
|
|
|
|
HeadBumpR -= eR[allpasstemp] * fpOld;
|
|
eR[hcount] = HeadBumpR;
|
|
inputSampleR *= fpOld;
|
|
|
|
hcount--; if (hcount < 0 || hcount > maxdelay) {hcount = maxdelay;}
|
|
HeadBumpL += (eL[hcount]);
|
|
HeadBumpR += (eR[hcount]);
|
|
//end PhaseNudge on head bump in lieu of delay.
|
|
SubtractL -= (HeadBumpL * (HeadBumpControl+iirMinHeadBumpL));
|
|
SubtractR -= (HeadBumpR * (HeadBumpControl+iirMinHeadBumpR));
|
|
//makes a second soften and a single head bump after saturation.
|
|
//we are going to retain this, and then feed it into the highpass filter. That way, we can skip a subtract.
|
|
//Head Bump retains a trace which is roughly as large as what the highpass will do.
|
|
|
|
tempSampleL = inputSampleL;
|
|
tempSampleR = inputSampleR;
|
|
|
|
iirMinHeadBumpL = (iirMinHeadBumpL * altHBoostAmount) + (fabs(inputSampleL) * iirHBoostAmount);
|
|
if (iirMinHeadBumpL > 0.01) iirMinHeadBumpL = 0.01;
|
|
|
|
iirMinHeadBumpR = (iirMinHeadBumpR * altHBoostAmount) + (fabs(inputSampleR) * iirHBoostAmount);
|
|
if (iirMinHeadBumpR > 0.01) iirMinHeadBumpR = 0.01;
|
|
//we want this one rectified so that it's a relatively steady positive value. Boosts can cause it to be
|
|
//greater than 1 so we clamp it in that case.
|
|
|
|
iirSampleAL = (iirSampleAL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleAL; SubtractL += iirSampleAL;
|
|
iirSampleBL = (iirSampleBL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleBL; SubtractL += iirSampleBL;
|
|
iirSampleCL = (iirSampleCL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleCL; SubtractL += iirSampleCL;
|
|
iirSampleDL = (iirSampleDL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleDL; SubtractL += iirSampleDL;
|
|
iirSampleEL = (iirSampleEL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleEL; SubtractL += iirSampleEL;
|
|
iirSampleFL = (iirSampleFL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleFL; SubtractL += iirSampleFL;
|
|
iirSampleGL = (iirSampleGL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleGL; SubtractL += iirSampleGL;
|
|
iirSampleHL = (iirSampleHL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleHL; SubtractL += iirSampleHL;
|
|
iirSampleIL = (iirSampleIL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleIL; SubtractL += iirSampleIL;
|
|
iirSampleJL = (iirSampleJL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleJL; SubtractL += iirSampleJL;
|
|
iirSampleKL = (iirSampleKL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleKL; SubtractL += iirSampleKL;
|
|
iirSampleLL = (iirSampleLL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleLL; SubtractL += iirSampleLL;
|
|
iirSampleML = (iirSampleML * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleML; SubtractL += iirSampleML;
|
|
iirSampleNL = (iirSampleNL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleNL; SubtractL += iirSampleNL;
|
|
iirSampleOL = (iirSampleOL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleOL; SubtractL += iirSampleOL;
|
|
iirSamplePL = (iirSamplePL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSamplePL; SubtractL += iirSamplePL;
|
|
iirSampleQL = (iirSampleQL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleQL; SubtractL += iirSampleQL;
|
|
iirSampleRL = (iirSampleRL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleRL; SubtractL += iirSampleRL;
|
|
iirSampleSL = (iirSampleSL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleSL; SubtractL += iirSampleSL;
|
|
iirSampleTL = (iirSampleTL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleTL; SubtractL += iirSampleTL;
|
|
iirSampleUL = (iirSampleUL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleUL; SubtractL += iirSampleUL;
|
|
iirSampleVL = (iirSampleVL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleVL; SubtractL += iirSampleVL;
|
|
iirSampleWL = (iirSampleWL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleWL; SubtractL += iirSampleWL;
|
|
iirSampleXL = (iirSampleXL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleXL; SubtractL += iirSampleXL;
|
|
iirSampleYL = (iirSampleYL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleYL; SubtractL += iirSampleYL;
|
|
iirSampleZL = (iirSampleZL * altAmount) + (tempSampleL * iirAmount); tempSampleL -= iirSampleZL; SubtractL += iirSampleZL;
|
|
|
|
iirSampleAR = (iirSampleAR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleAR; SubtractR += iirSampleAR;
|
|
iirSampleBR = (iirSampleBR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleBR; SubtractR += iirSampleBR;
|
|
iirSampleCR = (iirSampleCR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleCR; SubtractR += iirSampleCR;
|
|
iirSampleDR = (iirSampleDR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleDR; SubtractR += iirSampleDR;
|
|
iirSampleER = (iirSampleER * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleER; SubtractR += iirSampleER;
|
|
iirSampleFR = (iirSampleFR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleFR; SubtractR += iirSampleFR;
|
|
iirSampleGR = (iirSampleGR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleGR; SubtractR += iirSampleGR;
|
|
iirSampleHR = (iirSampleHR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleHR; SubtractR += iirSampleHR;
|
|
iirSampleIR = (iirSampleIR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleIR; SubtractR += iirSampleIR;
|
|
iirSampleJR = (iirSampleJR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleJR; SubtractR += iirSampleJR;
|
|
iirSampleKR = (iirSampleKR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleKR; SubtractR += iirSampleKR;
|
|
iirSampleLR = (iirSampleLR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleLR; SubtractR += iirSampleLR;
|
|
iirSampleMR = (iirSampleMR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleMR; SubtractR += iirSampleMR;
|
|
iirSampleNR = (iirSampleNR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleNR; SubtractR += iirSampleNR;
|
|
iirSampleOR = (iirSampleOR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleOR; SubtractR += iirSampleOR;
|
|
iirSamplePR = (iirSamplePR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSamplePR; SubtractR += iirSamplePR;
|
|
iirSampleQR = (iirSampleQR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleQR; SubtractR += iirSampleQR;
|
|
iirSampleRR = (iirSampleRR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleRR; SubtractR += iirSampleRR;
|
|
iirSampleSR = (iirSampleSR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleSR; SubtractR += iirSampleSR;
|
|
iirSampleTR = (iirSampleTR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleTR; SubtractR += iirSampleTR;
|
|
iirSampleUR = (iirSampleUR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleUR; SubtractR += iirSampleUR;
|
|
iirSampleVR = (iirSampleVR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleVR; SubtractR += iirSampleVR;
|
|
iirSampleWR = (iirSampleWR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleWR; SubtractR += iirSampleWR;
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iirSampleXR = (iirSampleXR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleXR; SubtractR += iirSampleXR;
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iirSampleYR = (iirSampleYR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleYR; SubtractR += iirSampleYR;
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iirSampleZR = (iirSampleZR * altAmount) + (tempSampleR * iirAmount); tempSampleR -= iirSampleZR; SubtractR += iirSampleZR;
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//do the IIR on a dummy sample, and store up the correction in a variable at the same scale as the very low level
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//numbers being used. Don't keep doing it against the possibly high level signal number.
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//This has been known to add a resonant quality to the cutoff, which we're using on purpose.
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|
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inputSampleL -= SubtractL;
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inputSampleR -= SubtractR;
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//apply stored up tiny corrections.
|
|
|
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if (outputgain != 1.0) {
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inputSampleL *= outputgain;
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inputSampleR *= outputgain;
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}
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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
|
|
|
|
*out1 = inputSampleL;
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|
*out2 = inputSampleR;
|
|
|
|
*in1++;
|
|
*in2++;
|
|
*out1++;
|
|
*out2++;
|
|
}
|
|
} |