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257 lines
No EOL
7.9 KiB
C++
Executable file
257 lines
No EOL
7.9 KiB
C++
Executable file
/* ========================================
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* Tremolo - Tremolo.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __Tremolo_H
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#include "Tremolo.h"
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#endif
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void Tremolo::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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speedChase = pow(A,4);
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depthChase = B;
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double speedSpeed = 300 / (fabs( lastSpeed - speedChase)+1.0);
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double depthSpeed = 300 / (fabs( lastDepth - depthChase)+1.0);
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lastSpeed = speedChase;
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lastDepth = depthChase;
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double speed;
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double depth;
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double skew;
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double density;
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double tupi = 3.141592653589793238;
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double control;
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double tempcontrol;
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double thickness;
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double out;
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double bridgerectifier;
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double offset;
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double inputSampleL;
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double inputSampleR;
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double drySampleL;
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double drySampleR;
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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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speedAmount = (((speedAmount*speedSpeed)+speedChase)/(speedSpeed + 1.0));
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depthAmount = (((depthAmount*depthSpeed)+depthChase)/(depthSpeed + 1.0));
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speed = 0.0001+(speedAmount/1000.0);
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speed /= overallscale;
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depth = 1.0 - pow(1.0-depthAmount,5);
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skew = 1.0+pow(depthAmount,9);
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density = ((1.0-depthAmount)*2.0) - 1.0;
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offset = sin(sweep);
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sweep += speed;
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if (sweep > tupi){sweep -= tupi;}
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control = fabs(offset);
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if (density > 0)
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{
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tempcontrol = sin(control);
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control = (control * (1.0-density))+(tempcontrol * density);
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}
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else
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{
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tempcontrol = 1-cos(control);
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control = (control * (1.0+density))+(tempcontrol * -density);
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}
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//produce either boosted or starved version of control signal
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//will go from 0 to 1
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thickness = ((control * 2.0) - 1.0)*skew;
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out = fabs(thickness);
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//do L
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bridgerectifier = fabs(inputSampleL);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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//max value for sine function
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if (thickness > 0) bridgerectifier = sin(bridgerectifier);
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else bridgerectifier = 1-cos(bridgerectifier);
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//produce either boosted or starved version
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if (inputSampleL > 0) inputSampleL = (inputSampleL*(1-out))+(bridgerectifier*out);
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else inputSampleL = (inputSampleL*(1-out))-(bridgerectifier*out);
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//blend according to density control
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inputSampleL *= (1.0 - control);
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inputSampleL *= 2.0;
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//apply tremolo, apply gain boost to compensate for volume loss
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inputSampleL = (drySampleL * (1-depth)) + (inputSampleL*depth);
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//end L
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//do R
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bridgerectifier = fabs(inputSampleR);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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//max value for sine function
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if (thickness > 0) bridgerectifier = sin(bridgerectifier);
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else bridgerectifier = 1-cos(bridgerectifier);
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//produce either boosted or starved version
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if (inputSampleR > 0) inputSampleR = (inputSampleR*(1-out))+(bridgerectifier*out);
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else inputSampleR = (inputSampleR*(1-out))-(bridgerectifier*out);
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//blend according to density control
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inputSampleR *= (1.0 - control);
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inputSampleR *= 2.0;
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//apply tremolo, apply gain boost to compensate for volume loss
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inputSampleR = (drySampleR * (1-depth)) + (inputSampleR*depth);
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//end R
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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 Tremolo::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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speedChase = pow(A,4);
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depthChase = B;
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double speedSpeed = 300 / (fabs( lastSpeed - speedChase)+1.0);
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double depthSpeed = 300 / (fabs( lastDepth - depthChase)+1.0);
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lastSpeed = speedChase;
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lastDepth = depthChase;
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double speed;
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double depth;
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double skew;
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double density;
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double tupi = 3.141592653589793238;
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double control;
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double tempcontrol;
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double thickness;
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double out;
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double bridgerectifier;
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double offset;
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double inputSampleL;
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double inputSampleR;
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double drySampleL;
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double drySampleR;
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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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speedAmount = (((speedAmount*speedSpeed)+speedChase)/(speedSpeed + 1.0));
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depthAmount = (((depthAmount*depthSpeed)+depthChase)/(depthSpeed + 1.0));
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speed = 0.0001+(speedAmount/1000.0);
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speed /= overallscale;
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depth = 1.0 - pow(1.0-depthAmount,5);
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skew = 1.0+pow(depthAmount,9);
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density = ((1.0-depthAmount)*2.0) - 1.0;
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offset = sin(sweep);
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sweep += speed;
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if (sweep > tupi){sweep -= tupi;}
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control = fabs(offset);
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if (density > 0)
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{
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tempcontrol = sin(control);
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control = (control * (1.0-density))+(tempcontrol * density);
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}
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else
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{
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tempcontrol = 1-cos(control);
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control = (control * (1.0+density))+(tempcontrol * -density);
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}
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//produce either boosted or starved version of control signal
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//will go from 0 to 1
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thickness = ((control * 2.0) - 1.0)*skew;
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out = fabs(thickness);
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//do L
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bridgerectifier = fabs(inputSampleL);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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//max value for sine function
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if (thickness > 0) bridgerectifier = sin(bridgerectifier);
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else bridgerectifier = 1-cos(bridgerectifier);
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//produce either boosted or starved version
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if (inputSampleL > 0) inputSampleL = (inputSampleL*(1-out))+(bridgerectifier*out);
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else inputSampleL = (inputSampleL*(1-out))-(bridgerectifier*out);
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//blend according to density control
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inputSampleL *= (1.0 - control);
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inputSampleL *= 2.0;
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//apply tremolo, apply gain boost to compensate for volume loss
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inputSampleL = (drySampleL * (1-depth)) + (inputSampleL*depth);
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//end L
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//do R
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bridgerectifier = fabs(inputSampleR);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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//max value for sine function
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if (thickness > 0) bridgerectifier = sin(bridgerectifier);
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else bridgerectifier = 1-cos(bridgerectifier);
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//produce either boosted or starved version
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if (inputSampleR > 0) inputSampleR = (inputSampleR*(1-out))+(bridgerectifier*out);
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else inputSampleR = (inputSampleR*(1-out))-(bridgerectifier*out);
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//blend according to density control
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inputSampleR *= (1.0 - control);
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inputSampleR *= 2.0;
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//apply tremolo, apply gain boost to compensate for volume loss
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inputSampleR = (drySampleR * (1-depth)) + (inputSampleR*depth);
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//end R
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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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} |