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268 lines
11 KiB
C++
Executable file
268 lines
11 KiB
C++
Executable file
/* ========================================
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* Channel8 - Channel8.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __Channel8_H
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#include "Channel8.h"
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#endif
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void Channel8::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 localiirAmount = iirAmount / overallscale;
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double localthreshold = threshold; //we've learned not to try and adjust threshold for sample rate
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double density = drive*2.0; //0-2
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double phattity = density - 1.0;
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if (density > 1.0) density = 1.0; //max out at full wet for Spiral aspect
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if (phattity < 0.0) phattity = 0.0; //
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double nonLin = 5.0-density; //number is smaller for more intense, larger for more subtle
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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 dielectricScaleL = fabs(2.0-((inputSampleL+nonLin)/nonLin));
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double dielectricScaleR = fabs(2.0-((inputSampleR+nonLin)/nonLin));
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if (flip)
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{
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iirSampleLA = (iirSampleLA * (1.0 - (localiirAmount * dielectricScaleL))) + (inputSampleL * localiirAmount * dielectricScaleL);
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inputSampleL = inputSampleL - iirSampleLA;
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iirSampleRA = (iirSampleRA * (1.0 - (localiirAmount * dielectricScaleR))) + (inputSampleR * localiirAmount * dielectricScaleR);
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inputSampleR = inputSampleR - iirSampleRA;
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}
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else
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{
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iirSampleLB = (iirSampleLB * (1.0 - (localiirAmount * dielectricScaleL))) + (inputSampleL * localiirAmount * dielectricScaleL);
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inputSampleL = inputSampleL - iirSampleLB;
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iirSampleRB = (iirSampleRB * (1.0 - (localiirAmount * dielectricScaleR))) + (inputSampleR * localiirAmount * dielectricScaleR);
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inputSampleR = inputSampleR - iirSampleRB;
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}
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//highpass section
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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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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double phatSampleL = sin(inputSampleL * 1.57079633);
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inputSampleL *= 1.2533141373155;
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//clip to 1.2533141373155 to reach maximum output, or 1.57079633 for pure sine 'phat' version
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double distSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((fabs(inputSampleL) == 0.0) ?1:fabs(inputSampleL));
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inputSampleL = distSampleL; //purest form is full Spiral
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if (density < 1.0) inputSampleL = (drySampleL*(1-density))+(distSampleL*density); //fade Spiral aspect
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if (phattity > 0.0) inputSampleL = (inputSampleL*(1-phattity))+(phatSampleL*phattity); //apply original Density on top
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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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double phatSampleR = sin(inputSampleR * 1.57079633);
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inputSampleR *= 1.2533141373155;
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//clip to 1.2533141373155 to reach maximum output, or 1.57079633 for pure sine 'phat' version
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double distSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((fabs(inputSampleR) == 0.0) ?1:fabs(inputSampleR));
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inputSampleR = distSampleR; //purest form is full Spiral
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if (density < 1.0) inputSampleR = (drySampleR*(1-density))+(distSampleR*density); //fade Spiral aspect
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if (phattity > 0.0) inputSampleR = (inputSampleR*(1-phattity))+(phatSampleR*phattity); //apply original Density on top
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//begin L
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double clamp = (lastSampleBL - lastSampleCL) * 0.381966011250105;
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clamp -= (lastSampleAL - lastSampleBL) * 0.6180339887498948482045;
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clamp += inputSampleL - lastSampleAL; //regular slew clamping added
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lastSampleCL = lastSampleBL;
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lastSampleBL = lastSampleAL;
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lastSampleAL = inputSampleL; //now our output relates off lastSampleB
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if (clamp > localthreshold)
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inputSampleL = lastSampleBL + localthreshold;
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if (-clamp > localthreshold)
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inputSampleL = lastSampleBL - localthreshold;
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lastSampleAL = (lastSampleAL*0.381966011250105)+(inputSampleL*0.6180339887498948482045); //split the difference between raw and smoothed for buffer
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//end L
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//begin R
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clamp = (lastSampleBR - lastSampleCR) * 0.381966011250105;
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clamp -= (lastSampleAR - lastSampleBR) * 0.6180339887498948482045;
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clamp += inputSampleR - lastSampleAR; //regular slew clamping added
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lastSampleCR = lastSampleBR;
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lastSampleBR = lastSampleAR;
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lastSampleAR = inputSampleR; //now our output relates off lastSampleB
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if (clamp > localthreshold)
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inputSampleR = lastSampleBR + localthreshold;
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if (-clamp > localthreshold)
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inputSampleR = lastSampleBR - localthreshold;
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lastSampleAR = (lastSampleAR*0.381966011250105)+(inputSampleR*0.6180339887498948482045); //split the difference between raw and smoothed for buffer
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//end R
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flip = !flip;
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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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//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 Channel8::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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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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double localiirAmount = iirAmount / overallscale;
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double localthreshold = threshold; //we've learned not to try and adjust threshold for sample rate
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double density = drive*2.0; //0-2
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double phattity = density - 1.0;
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if (density > 1.0) density = 1.0; //max out at full wet for Spiral aspect
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if (phattity < 0.0) phattity = 0.0; //
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double nonLin = 5.0-density; //number is smaller for more intense, larger for more subtle
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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 dielectricScaleL = fabs(2.0-((inputSampleL+nonLin)/nonLin));
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double dielectricScaleR = fabs(2.0-((inputSampleR+nonLin)/nonLin));
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if (flip)
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{
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iirSampleLA = (iirSampleLA * (1.0 - (localiirAmount * dielectricScaleL))) + (inputSampleL * localiirAmount * dielectricScaleL);
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inputSampleL = inputSampleL - iirSampleLA;
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iirSampleRA = (iirSampleRA * (1.0 - (localiirAmount * dielectricScaleR))) + (inputSampleR * localiirAmount * dielectricScaleR);
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inputSampleR = inputSampleR - iirSampleRA;
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}
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else
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{
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iirSampleLB = (iirSampleLB * (1.0 - (localiirAmount * dielectricScaleL))) + (inputSampleL * localiirAmount * dielectricScaleL);
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inputSampleL = inputSampleL - iirSampleLB;
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iirSampleRB = (iirSampleRB * (1.0 - (localiirAmount * dielectricScaleR))) + (inputSampleR * localiirAmount * dielectricScaleR);
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inputSampleR = inputSampleR - iirSampleRB;
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}
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//highpass section
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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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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double phatSampleL = sin(inputSampleL * 1.57079633);
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inputSampleL *= 1.2533141373155;
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//clip to 1.2533141373155 to reach maximum output, or 1.57079633 for pure sine 'phat' version
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double distSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((fabs(inputSampleL) == 0.0) ?1:fabs(inputSampleL));
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inputSampleL = distSampleL; //purest form is full Spiral
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if (density < 1.0) inputSampleL = (drySampleL*(1-density))+(distSampleL*density); //fade Spiral aspect
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if (phattity > 0.0) inputSampleL = (inputSampleL*(1-phattity))+(phatSampleL*phattity); //apply original Density on top
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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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double phatSampleR = sin(inputSampleR * 1.57079633);
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inputSampleR *= 1.2533141373155;
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//clip to 1.2533141373155 to reach maximum output, or 1.57079633 for pure sine 'phat' version
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double distSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((fabs(inputSampleR) == 0.0) ?1:fabs(inputSampleR));
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inputSampleR = distSampleR; //purest form is full Spiral
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if (density < 1.0) inputSampleR = (drySampleR*(1-density))+(distSampleR*density); //fade Spiral aspect
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if (phattity > 0.0) inputSampleR = (inputSampleR*(1-phattity))+(phatSampleR*phattity); //apply original Density on top
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//begin L
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double clamp = (lastSampleBL - lastSampleCL) * 0.381966011250105;
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clamp -= (lastSampleAL - lastSampleBL) * 0.6180339887498948482045;
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clamp += inputSampleL - lastSampleAL; //regular slew clamping added
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lastSampleCL = lastSampleBL;
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lastSampleBL = lastSampleAL;
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lastSampleAL = inputSampleL; //now our output relates off lastSampleB
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if (clamp > localthreshold)
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inputSampleL = lastSampleBL + localthreshold;
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if (-clamp > localthreshold)
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inputSampleL = lastSampleBL - localthreshold;
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lastSampleAL = (lastSampleAL*0.381966011250105)+(inputSampleL*0.6180339887498948482045); //split the difference between raw and smoothed for buffer
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//end L
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//begin R
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clamp = (lastSampleBR - lastSampleCR) * 0.381966011250105;
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clamp -= (lastSampleAR - lastSampleBR) * 0.6180339887498948482045;
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clamp += inputSampleR - lastSampleAR; //regular slew clamping added
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lastSampleCR = lastSampleBR;
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lastSampleBR = lastSampleAR;
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lastSampleAR = inputSampleR; //now our output relates off lastSampleB
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if (clamp > localthreshold)
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inputSampleR = lastSampleBR + localthreshold;
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if (-clamp > localthreshold)
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inputSampleR = lastSampleBR - localthreshold;
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lastSampleAR = (lastSampleAR*0.381966011250105)+(inputSampleR*0.6180339887498948482045); //split the difference between raw and smoothed for buffer
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//end R
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flip = !flip;
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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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//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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