mirror of
https://github.com/airwindows/airwindows.git
synced 2026-05-16 06:05:55 -06:00
122 lines
4.3 KiB
C++
Executable file
122 lines
4.3 KiB
C++
Executable file
/* ========================================
|
|
* Flutter - Flutter.h
|
|
* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
|
|
* ======================================== */
|
|
|
|
#ifndef __Flutter_H
|
|
#include "Flutter.h"
|
|
#endif
|
|
|
|
void Flutter::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
|
|
{
|
|
float* in1 = inputs[0];
|
|
float* in2 = inputs[1];
|
|
float* out1 = outputs[0];
|
|
float* out2 = outputs[1];
|
|
|
|
double overallscale = 1.0;
|
|
overallscale /= 44100.0;
|
|
overallscale *= getSampleRate();
|
|
|
|
double depth = pow(A,2)*overallscale*70;
|
|
double fluttertrim = (0.0024*pow(A,2))/overallscale;
|
|
|
|
while (--sampleFrames >= 0)
|
|
{
|
|
double inputSampleL = *in1;
|
|
double inputSampleR = *in2;
|
|
if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
|
|
if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
|
|
|
|
if (gcount < 0 || gcount > 999) gcount = 999;
|
|
dL[gcount] = inputSampleL; dR[gcount] = inputSampleR;
|
|
int count = gcount;
|
|
double offset = depth + (depth * pow(rateof,2) * sin(sweep));
|
|
count += (int)floor(offset);
|
|
|
|
inputSampleL = (dL[count-((count > 999)?1000:0)] * (1-(offset-floor(offset))));
|
|
inputSampleL += (dL[count+1-((count+1 > 999)?1000:0)] * (offset-floor(offset)));
|
|
inputSampleR = (dR[count-((count > 999)?1000:0)] * (1-(offset-floor(offset))));
|
|
inputSampleR += (dR[count+1-((count+1 > 999)?1000:0)] * (offset-floor(offset)));
|
|
|
|
rateof = (rateof * (1.0-fluttertrim)) + (nextmax * fluttertrim);
|
|
sweep += rateof * fluttertrim;
|
|
if (sweep >= (M_PI*2.0)) {sweep -= M_PI; nextmax = 0.24 + (fpdL / (double)UINT32_MAX * 0.74);}
|
|
//apply to input signal only when flutter is present, interpolate samples
|
|
gcount--;
|
|
|
|
//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 Flutter::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 depth = pow(A,2)*overallscale*70;
|
|
double fluttertrim = (0.0024*pow(A,2))/overallscale;
|
|
|
|
while (--sampleFrames >= 0)
|
|
{
|
|
double inputSampleL = *in1;
|
|
double inputSampleR = *in2;
|
|
if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
|
|
if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
|
|
|
|
if (gcount < 0 || gcount > 999) gcount = 999;
|
|
dL[gcount] = inputSampleL; dR[gcount] = inputSampleR;
|
|
int count = gcount;
|
|
double offset = depth + (depth * pow(rateof,2) * sin(sweep));
|
|
count += (int)floor(offset);
|
|
|
|
inputSampleL = (dL[count-((count > 999)?1000:0)] * (1-(offset-floor(offset))));
|
|
inputSampleL += (dL[count+1-((count+1 > 999)?1000:0)] * (offset-floor(offset)));
|
|
inputSampleR = (dR[count-((count > 999)?1000:0)] * (1-(offset-floor(offset))));
|
|
inputSampleR += (dR[count+1-((count+1 > 999)?1000:0)] * (offset-floor(offset)));
|
|
|
|
rateof = (rateof * (1.0-fluttertrim)) + (nextmax * fluttertrim);
|
|
sweep += rateof * fluttertrim;
|
|
if (sweep >= (M_PI*2.0)) {sweep -= M_PI; nextmax = 0.24 + (fpdL / (double)UINT32_MAX * 0.74);}
|
|
//apply to input signal only when flutter is present, interpolate samples
|
|
gcount--;
|
|
|
|
//begin 64 bit stereo floating point dither
|
|
//int expon; frexp((double)inputSampleL, &expon);
|
|
fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
|
|
//inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
|
|
//frexp((double)inputSampleR, &expon);
|
|
fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
|
|
//inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
|
|
//end 64 bit stereo floating point dither
|
|
|
|
*out1 = inputSampleL;
|
|
*out2 = inputSampleR;
|
|
|
|
in1++;
|
|
in2++;
|
|
out1++;
|
|
out2++;
|
|
}
|
|
}
|