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308 lines
No EOL
13 KiB
C++
Executable file
308 lines
No EOL
13 KiB
C++
Executable file
/* ========================================
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* ChorusEnsemble - ChorusEnsemble.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __ChorusEnsemble_H
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#include "ChorusEnsemble.h"
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#endif
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void ChorusEnsemble::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 speed = pow(A,3) * 0.001;
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speed *= overallscale;
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int loopLimit = (int)(totalsamples * 0.499);
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int count;
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double range = pow(B,3) * loopLimit * 0.12;
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double wet = C;
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double modulation = range*wet;
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//removed extra dry variable
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double tupi = 3.141592653589793238 * 2.0;
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double offset;
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double start[4];
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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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//now we'll precalculate some stuff that needn't be in every sample
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start[0] = range;
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start[1] = range * 2;
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start[2] = range * 3;
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start[3] = range * 4;
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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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airFactorL = airPrevL - inputSampleL;
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if (fpFlip) {airEvenL += airFactorL; airOddL -= airFactorL; airFactorL = airEvenL;}
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else {airOddL += airFactorL; airEvenL -= airFactorL; airFactorL = airOddL;}
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airOddL = (airOddL - ((airOddL - airEvenL)/256.0)) / 1.0001;
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airEvenL = (airEvenL - ((airEvenL - airOddL)/256.0)) / 1.0001;
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airPrevL = inputSampleL;
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inputSampleL += (airFactorL*wet);
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//air, compensates for loss of highs in flanger's interpolation
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airFactorR = airPrevR - inputSampleR;
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if (fpFlip) {airEvenR += airFactorR; airOddR -= airFactorR; airFactorR = airEvenR;}
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else {airOddR += airFactorR; airEvenR -= airFactorR; airFactorR = airOddR;}
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airOddR = (airOddR - ((airOddR - airEvenR)/256.0)) / 1.0001;
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airEvenR = (airEvenR - ((airEvenR - airOddR)/256.0)) / 1.0001;
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airPrevR = inputSampleR;
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inputSampleR += (airFactorR*wet);
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//air, compensates for loss of highs in flanger's interpolation
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if (gcount < 1 || gcount > loopLimit) {gcount = loopLimit;}
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count = gcount;
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dL[count+loopLimit] = dL[count] = inputSampleL;
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dR[count+loopLimit] = dR[count] = inputSampleR;
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gcount--;
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//double buffer
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offset = start[0] + (modulation * sin(sweep));
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count = gcount + (int)floor(offset);
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inputSampleL = dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
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inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
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inputSampleR = dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
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inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
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offset = start[1] + (modulation * sin(sweep + 1.0));
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count = gcount + (int)floor(offset);
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inputSampleL += dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
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inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
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inputSampleR += dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
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inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
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offset = start[2] + (modulation * sin(sweep + 2.0));
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count = gcount + (int)floor(offset);
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inputSampleL += dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
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inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
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inputSampleR += dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
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inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
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offset = start[3] + (modulation * sin(sweep + 3.0));
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count = gcount + (int)floor(offset);
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inputSampleL += dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
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inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
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inputSampleR += dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
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inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
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inputSampleL *= 0.125; //to get a comparable level
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inputSampleR *= 0.125; //to get a comparable level
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sweep += speed;
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if (sweep > tupi){sweep -= tupi;}
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//still scrolling through the samples, remember
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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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fpFlip = !fpFlip;
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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 ChorusEnsemble::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 speed = pow(A,3) * 0.001;
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speed *= overallscale;
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int loopLimit = (int)(totalsamples * 0.499);
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int count;
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double range = pow(B,3) * loopLimit * 0.12;
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double wet = C;
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double modulation = range*wet;
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//removed extra dry variable
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double tupi = 3.141592653589793238 * 2.0;
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double offset;
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double start[4];
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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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//now we'll precalculate some stuff that needn't be in every sample
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start[0] = range;
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start[1] = range * 2;
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start[2] = range * 3;
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start[3] = range * 4;
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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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airFactorL = airPrevL - inputSampleL;
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if (fpFlip) {airEvenL += airFactorL; airOddL -= airFactorL; airFactorL = airEvenL;}
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else {airOddL += airFactorL; airEvenL -= airFactorL; airFactorL = airOddL;}
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airOddL = (airOddL - ((airOddL - airEvenL)/256.0)) / 1.0001;
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airEvenL = (airEvenL - ((airEvenL - airOddL)/256.0)) / 1.0001;
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airPrevL = inputSampleL;
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inputSampleL += (airFactorL*wet);
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//air, compensates for loss of highs in flanger's interpolation
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airFactorR = airPrevR - inputSampleR;
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if (fpFlip) {airEvenR += airFactorR; airOddR -= airFactorR; airFactorR = airEvenR;}
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else {airOddR += airFactorR; airEvenR -= airFactorR; airFactorR = airOddR;}
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airOddR = (airOddR - ((airOddR - airEvenR)/256.0)) / 1.0001;
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airEvenR = (airEvenR - ((airEvenR - airOddR)/256.0)) / 1.0001;
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airPrevR = inputSampleR;
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inputSampleR += (airFactorR*wet);
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//air, compensates for loss of highs in flanger's interpolation
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if (gcount < 1 || gcount > loopLimit) {gcount = loopLimit;}
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count = gcount;
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dL[count+loopLimit] = dL[count] = inputSampleL;
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dR[count+loopLimit] = dR[count] = inputSampleR;
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gcount--;
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//double buffer
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offset = start[0] + (modulation * sin(sweep));
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count = gcount + (int)floor(offset);
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inputSampleL = dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
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inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
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inputSampleR = dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
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inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
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offset = start[1] + (modulation * sin(sweep + 1.0));
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count = gcount + (int)floor(offset);
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inputSampleL += dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
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inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
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inputSampleR += dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
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inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
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offset = start[2] + (modulation * sin(sweep + 2.0));
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count = gcount + (int)floor(offset);
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inputSampleL += dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
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inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
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inputSampleR += dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
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inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
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offset = start[3] + (modulation * sin(sweep + 3.0));
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count = gcount + (int)floor(offset);
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inputSampleL += dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
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inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
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inputSampleR += dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
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inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
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inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
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inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
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inputSampleL *= 0.125; //to get a comparable level
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inputSampleR *= 0.125; //to get a comparable level
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sweep += speed;
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if (sweep > tupi){sweep -= tupi;}
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//still scrolling through the samples, remember
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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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fpFlip = !fpFlip;
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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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} |