/* ======================================== * Isolator2 - Isolator2.h * Copyright (c) 2016 airwindows, Airwindows uses the MIT license * ======================================== */ #ifndef __Gain_H #include "Isolator2.h" #endif void Isolator2::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames) { float* in1 = inputs[0]; float* in2 = inputs[1]; float* out1 = outputs[0]; float* out2 = outputs[1]; VstInt32 inFramesToProcess = sampleFrames; //vst doesn't give us this as a separate variable so we'll make it double overallscale = 1.0; overallscale /= 44100.0; overallscale *= getSampleRate(); biquadA[biq_freq] = pow(A,(2.0*sqrt(overallscale)))*0.4999; if (biquadA[biq_freq] < 0.0005) biquadA[biq_freq] = 0.0005; biquadG[biq_freq] = biquadF[biq_freq] = biquadE[biq_freq] = biquadD[biq_freq] = biquadC[biq_freq] = biquadB[biq_freq] = biquadA[biq_freq]; double reso = pow(B,2); double resoBoost = reso+1.0; reso = 1.0-reso; biquadA[biq_reso] = 4.46570214 * resoBoost; biquadB[biq_reso] = 1.51387132 * resoBoost; biquadC[biq_reso] = 0.93979296 * resoBoost; biquadD[biq_reso] = 0.70710678 * resoBoost; biquadE[biq_reso] = 0.59051105 * resoBoost; biquadF[biq_reso] = 0.52972649 * resoBoost; biquadG[biq_reso] = 0.50316379 * resoBoost; biquadA[biq_aA0] = biquadA[biq_aB0]; biquadA[biq_aA1] = biquadA[biq_aB1]; biquadA[biq_aA2] = biquadA[biq_aB2]; biquadA[biq_bA1] = biquadA[biq_bB1]; biquadA[biq_bA2] = biquadA[biq_bB2]; biquadB[biq_aA0] = biquadB[biq_aB0]; biquadB[biq_aA1] = biquadB[biq_aB1]; biquadB[biq_aA2] = biquadB[biq_aB2]; biquadB[biq_bA1] = biquadB[biq_bB1]; biquadB[biq_bA2] = biquadB[biq_bB2]; biquadC[biq_aA0] = biquadC[biq_aB0]; biquadC[biq_aA1] = biquadC[biq_aB1]; biquadC[biq_aA2] = biquadC[biq_aB2]; biquadC[biq_bA1] = biquadC[biq_bB1]; biquadC[biq_bA2] = biquadC[biq_bB2]; biquadD[biq_aA0] = biquadD[biq_aB0]; biquadD[biq_aA1] = biquadD[biq_aB1]; biquadD[biq_aA2] = biquadD[biq_aB2]; biquadD[biq_bA1] = biquadD[biq_bB1]; biquadD[biq_bA2] = biquadD[biq_bB2]; biquadE[biq_aA0] = biquadE[biq_aB0]; biquadE[biq_aA1] = biquadE[biq_aB1]; biquadE[biq_aA2] = biquadE[biq_aB2]; biquadE[biq_bA1] = biquadE[biq_bB1]; biquadE[biq_bA2] = biquadE[biq_bB2]; biquadF[biq_aA0] = biquadF[biq_aB0]; biquadF[biq_aA1] = biquadF[biq_aB1]; biquadF[biq_aA2] = biquadF[biq_aB2]; biquadF[biq_bA1] = biquadF[biq_bB1]; biquadF[biq_bA2] = biquadF[biq_bB2]; biquadG[biq_aA0] = biquadG[biq_aB0]; biquadG[biq_aA1] = biquadG[biq_aB1]; biquadG[biq_aA2] = biquadG[biq_aB2]; biquadG[biq_bA1] = biquadG[biq_bB1]; biquadG[biq_bA2] = biquadG[biq_bB2]; //previous run through the buffer is still in the filter, so we move it //to the A section and now it's the new starting point. double K = tan(M_PI * biquadA[biq_freq]); double norm = 1.0 / (1.0 + K / biquadA[biq_reso] + K * K); biquadA[biq_aB0] = K * K * norm; biquadA[biq_aB1] = 2.0 * biquadA[biq_aB0]; biquadA[biq_aB2] = biquadA[biq_aB0]; biquadA[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadA[biq_bB2] = (1.0 - K / biquadA[biq_reso] + K * K) * norm; K = tan(M_PI * biquadB[biq_freq]); norm = 1.0 / (1.0 + K / biquadB[biq_reso] + K * K); biquadB[biq_aB0] = K * K * norm; biquadB[biq_aB1] = 2.0 * biquadB[biq_aB0]; biquadB[biq_aB2] = biquadB[biq_aB0]; biquadB[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadB[biq_bB2] = (1.0 - K / biquadB[biq_reso] + K * K) * norm; K = tan(M_PI * biquadC[biq_freq]); norm = 1.0 / (1.0 + K / biquadC[biq_reso] + K * K); biquadC[biq_aB0] = K * K * norm; biquadC[biq_aB1] = 2.0 * biquadC[biq_aB0]; biquadC[biq_aB2] = biquadC[biq_aB0]; biquadC[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadC[biq_bB2] = (1.0 - K / biquadC[biq_reso] + K * K) * norm; K = tan(M_PI * biquadD[biq_freq]); norm = 1.0 / (1.0 + K / biquadD[biq_reso] + K * K); biquadD[biq_aB0] = K * K * norm; biquadD[biq_aB1] = 2.0 * biquadD[biq_aB0]; biquadD[biq_aB2] = biquadD[biq_aB0]; biquadD[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadD[biq_bB2] = (1.0 - K / biquadD[biq_reso] + K * K) * norm; K = tan(M_PI * biquadE[biq_freq]); norm = 1.0 / (1.0 + K / biquadE[biq_reso] + K * K); biquadE[biq_aB0] = K * K * norm; biquadE[biq_aB1] = 2.0 * biquadE[biq_aB0]; biquadE[biq_aB2] = biquadE[biq_aB0]; biquadE[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadE[biq_bB2] = (1.0 - K / biquadE[biq_reso] + K * K) * norm; K = tan(M_PI * biquadF[biq_freq]); norm = 1.0 / (1.0 + K / biquadF[biq_reso] + K * K); biquadF[biq_aB0] = K * K * norm; biquadF[biq_aB1] = 2.0 * biquadF[biq_aB0]; biquadF[biq_aB2] = biquadF[biq_aB0]; biquadF[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadF[biq_bB2] = (1.0 - K / biquadF[biq_reso] + K * K) * norm; K = tan(M_PI * biquadG[biq_freq]); norm = 1.0 / (1.0 + K / biquadG[biq_reso] + K * K); biquadG[biq_aB0] = K * K * norm; biquadG[biq_aB1] = 2.0 * biquadG[biq_aB0]; biquadG[biq_aB2] = biquadG[biq_aB0]; biquadG[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadG[biq_bB2] = (1.0 - K / biquadG[biq_reso] + K * K) * norm; bool bypass = (A == 1.0); highA = highB; highB = C*reso; if (highB > 0.0) bypass = false; lowA = lowB; lowB = D*reso; if (lowB < 1.0) bypass = false; 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; double drySampleL = inputSampleL; double drySampleR = inputSampleR; double temp = (double)sampleFrames/inFramesToProcess; biquadA[biq_a0] = (biquadA[biq_aA0]*temp)+(biquadA[biq_aB0]*(1.0-temp)); biquadA[biq_a1] = (biquadA[biq_aA1]*temp)+(biquadA[biq_aB1]*(1.0-temp)); biquadA[biq_a2] = (biquadA[biq_aA2]*temp)+(biquadA[biq_aB2]*(1.0-temp)); biquadA[biq_b1] = (biquadA[biq_bA1]*temp)+(biquadA[biq_bB1]*(1.0-temp)); biquadA[biq_b2] = (biquadA[biq_bA2]*temp)+(biquadA[biq_bB2]*(1.0-temp)); biquadB[biq_a0] = (biquadB[biq_aA0]*temp)+(biquadB[biq_aB0]*(1.0-temp)); biquadB[biq_a1] = (biquadB[biq_aA1]*temp)+(biquadB[biq_aB1]*(1.0-temp)); biquadB[biq_a2] = (biquadB[biq_aA2]*temp)+(biquadB[biq_aB2]*(1.0-temp)); biquadB[biq_b1] = (biquadB[biq_bA1]*temp)+(biquadB[biq_bB1]*(1.0-temp)); biquadB[biq_b2] = (biquadB[biq_bA2]*temp)+(biquadB[biq_bB2]*(1.0-temp)); biquadC[biq_a0] = (biquadC[biq_aA0]*temp)+(biquadC[biq_aB0]*(1.0-temp)); biquadC[biq_a1] = (biquadC[biq_aA1]*temp)+(biquadC[biq_aB1]*(1.0-temp)); biquadC[biq_a2] = (biquadC[biq_aA2]*temp)+(biquadC[biq_aB2]*(1.0-temp)); biquadC[biq_b1] = (biquadC[biq_bA1]*temp)+(biquadC[biq_bB1]*(1.0-temp)); biquadC[biq_b2] = (biquadC[biq_bA2]*temp)+(biquadC[biq_bB2]*(1.0-temp)); biquadD[biq_a0] = (biquadD[biq_aA0]*temp)+(biquadD[biq_aB0]*(1.0-temp)); biquadD[biq_a1] = (biquadD[biq_aA1]*temp)+(biquadD[biq_aB1]*(1.0-temp)); biquadD[biq_a2] = (biquadD[biq_aA2]*temp)+(biquadD[biq_aB2]*(1.0-temp)); biquadD[biq_b1] = (biquadD[biq_bA1]*temp)+(biquadD[biq_bB1]*(1.0-temp)); biquadD[biq_b2] = (biquadD[biq_bA2]*temp)+(biquadD[biq_bB2]*(1.0-temp)); biquadE[biq_a0] = (biquadE[biq_aA0]*temp)+(biquadE[biq_aB0]*(1.0-temp)); biquadE[biq_a1] = (biquadE[biq_aA1]*temp)+(biquadE[biq_aB1]*(1.0-temp)); biquadE[biq_a2] = (biquadE[biq_aA2]*temp)+(biquadE[biq_aB2]*(1.0-temp)); biquadE[biq_b1] = (biquadE[biq_bA1]*temp)+(biquadE[biq_bB1]*(1.0-temp)); biquadE[biq_b2] = (biquadE[biq_bA2]*temp)+(biquadE[biq_bB2]*(1.0-temp)); biquadF[biq_a0] = (biquadF[biq_aA0]*temp)+(biquadF[biq_aB0]*(1.0-temp)); biquadF[biq_a1] = (biquadF[biq_aA1]*temp)+(biquadF[biq_aB1]*(1.0-temp)); biquadF[biq_a2] = (biquadF[biq_aA2]*temp)+(biquadF[biq_aB2]*(1.0-temp)); biquadF[biq_b1] = (biquadF[biq_bA1]*temp)+(biquadF[biq_bB1]*(1.0-temp)); biquadF[biq_b2] = (biquadF[biq_bA2]*temp)+(biquadF[biq_bB2]*(1.0-temp)); biquadG[biq_a0] = (biquadG[biq_aA0]*temp)+(biquadG[biq_aB0]*(1.0-temp)); biquadG[biq_a1] = (biquadG[biq_aA1]*temp)+(biquadG[biq_aB1]*(1.0-temp)); biquadG[biq_a2] = (biquadG[biq_aA2]*temp)+(biquadG[biq_aB2]*(1.0-temp)); biquadG[biq_b1] = (biquadG[biq_bA1]*temp)+(biquadG[biq_bB1]*(1.0-temp)); biquadG[biq_b2] = (biquadG[biq_bA2]*temp)+(biquadG[biq_bB2]*(1.0-temp)); //this is the interpolation code for the biquad double high = (highA*temp)+(highB*(1.0-temp)); double low = (lowA*temp)+(lowB*(1.0-temp)); double outSample = (inputSampleL * biquadA[biq_a0]) + biquadA[biq_sL1]; biquadA[biq_sL1] = (inputSampleL * biquadA[biq_a1]) - (outSample * biquadA[biq_b1]) + biquadA[biq_sL2]; biquadA[biq_sL2] = (inputSampleL * biquadA[biq_a2]) - (outSample * biquadA[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadA[biq_a0]) + biquadA[biq_sR1]; biquadA[biq_sR1] = (inputSampleR * biquadA[biq_a1]) - (outSample * biquadA[biq_b1]) + biquadA[biq_sR2]; biquadA[biq_sR2] = (inputSampleR * biquadA[biq_a2]) - (outSample * biquadA[biq_b2]); inputSampleR = outSample; outSample = (inputSampleL * biquadB[biq_a0]) + biquadB[biq_sL1]; biquadB[biq_sL1] = (inputSampleL * biquadB[biq_a1]) - (outSample * biquadB[biq_b1]) + biquadB[biq_sL2]; biquadB[biq_sL2] = (inputSampleL * biquadB[biq_a2]) - (outSample * biquadB[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadB[biq_a0]) + biquadB[biq_sR1]; biquadB[biq_sR1] = (inputSampleR * biquadB[biq_a1]) - (outSample * biquadB[biq_b1]) + biquadB[biq_sR2]; biquadB[biq_sR2] = (inputSampleR * biquadB[biq_a2]) - (outSample * biquadB[biq_b2]); inputSampleR = outSample; outSample = (inputSampleL * biquadC[biq_a0]) + biquadC[biq_sL1]; biquadC[biq_sL1] = (inputSampleL * biquadC[biq_a1]) - (outSample * biquadC[biq_b1]) + biquadC[biq_sL2]; biquadC[biq_sL2] = (inputSampleL * biquadC[biq_a2]) - (outSample * biquadC[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadC[biq_a0]) + biquadC[biq_sR1]; biquadC[biq_sR1] = (inputSampleR * biquadC[biq_a1]) - (outSample * biquadC[biq_b1]) + biquadC[biq_sR2]; biquadC[biq_sR2] = (inputSampleR * biquadC[biq_a2]) - (outSample * biquadC[biq_b2]); inputSampleR = outSample; outSample = (inputSampleL * biquadD[biq_a0]) + biquadD[biq_sL1]; biquadD[biq_sL1] = (inputSampleL * biquadD[biq_a1]) - (outSample * biquadD[biq_b1]) + biquadD[biq_sL2]; biquadD[biq_sL2] = (inputSampleL * biquadD[biq_a2]) - (outSample * biquadD[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadD[biq_a0]) + biquadD[biq_sR1]; biquadD[biq_sR1] = (inputSampleR * biquadD[biq_a1]) - (outSample * biquadD[biq_b1]) + biquadD[biq_sR2]; biquadD[biq_sR2] = (inputSampleR * biquadD[biq_a2]) - (outSample * biquadD[biq_b2]); inputSampleR = outSample; outSample = (inputSampleL * biquadE[biq_a0]) + biquadE[biq_sL1]; biquadE[biq_sL1] = (inputSampleL * biquadE[biq_a1]) - (outSample * biquadE[biq_b1]) + biquadE[biq_sL2]; biquadE[biq_sL2] = (inputSampleL * biquadE[biq_a2]) - (outSample * biquadE[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadE[biq_a0]) + biquadE[biq_sR1]; biquadE[biq_sR1] = (inputSampleR * biquadE[biq_a1]) - (outSample * biquadE[biq_b1]) + biquadE[biq_sR2]; biquadE[biq_sR2] = (inputSampleR * biquadE[biq_a2]) - (outSample * biquadE[biq_b2]); inputSampleR = outSample; outSample = (inputSampleL * biquadF[biq_a0]) + biquadF[biq_sL1]; biquadF[biq_sL1] = (inputSampleL * biquadF[biq_a1]) - (outSample * biquadF[biq_b1]) + biquadF[biq_sL2]; biquadF[biq_sL2] = (inputSampleL * biquadF[biq_a2]) - (outSample * biquadF[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadF[biq_a0]) + biquadF[biq_sR1]; biquadF[biq_sR1] = (inputSampleR * biquadF[biq_a1]) - (outSample * biquadF[biq_b1]) + biquadF[biq_sR2]; biquadF[biq_sR2] = (inputSampleR * biquadF[biq_a2]) - (outSample * biquadF[biq_b2]); inputSampleR = outSample; outSample = (inputSampleL * biquadG[biq_a0]) + biquadG[biq_sL1]; biquadG[biq_sL1] = (inputSampleL * biquadG[biq_a1]) - (outSample * biquadG[biq_b1]) + biquadG[biq_sL2]; biquadG[biq_sL2] = (inputSampleL * biquadG[biq_a2]) - (outSample * biquadG[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadG[biq_a0]) + biquadG[biq_sR1]; biquadG[biq_sR1] = (inputSampleR * biquadG[biq_a1]) - (outSample * biquadG[biq_b1]) + biquadG[biq_sR2]; biquadG[biq_sR2] = (inputSampleR * biquadG[biq_a2]) - (outSample * biquadG[biq_b2]); inputSampleR = outSample; if (bypass) { inputSampleL = drySampleL; inputSampleR = drySampleR; } else { inputSampleL = (inputSampleL * low) + ((drySampleL - inputSampleL)*high); inputSampleR = (inputSampleR * low) + ((drySampleR - inputSampleR)*high); } //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 Isolator2::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames) { double* in1 = inputs[0]; double* in2 = inputs[1]; double* out1 = outputs[0]; double* out2 = outputs[1]; VstInt32 inFramesToProcess = sampleFrames; //vst doesn't give us this as a separate variable so we'll make it double overallscale = 1.0; overallscale /= 44100.0; overallscale *= getSampleRate(); biquadA[biq_freq] = pow(A,(2.0*sqrt(overallscale)))*0.4999; if (biquadA[biq_freq] < 0.0005) biquadA[biq_freq] = 0.0005; biquadG[biq_freq] = biquadF[biq_freq] = biquadE[biq_freq] = biquadD[biq_freq] = biquadC[biq_freq] = biquadB[biq_freq] = biquadA[biq_freq]; double reso = pow(B,2); double resoBoost = reso+1.0; reso = 1.0-reso; biquadA[biq_reso] = 4.46570214 * resoBoost; biquadB[biq_reso] = 1.51387132 * resoBoost; biquadC[biq_reso] = 0.93979296 * resoBoost; biquadD[biq_reso] = 0.70710678 * resoBoost; biquadE[biq_reso] = 0.59051105 * resoBoost; biquadF[biq_reso] = 0.52972649 * resoBoost; biquadG[biq_reso] = 0.50316379 * resoBoost; biquadA[biq_aA0] = biquadA[biq_aB0]; biquadA[biq_aA1] = biquadA[biq_aB1]; biquadA[biq_aA2] = biquadA[biq_aB2]; biquadA[biq_bA1] = biquadA[biq_bB1]; biquadA[biq_bA2] = biquadA[biq_bB2]; biquadB[biq_aA0] = biquadB[biq_aB0]; biquadB[biq_aA1] = biquadB[biq_aB1]; biquadB[biq_aA2] = biquadB[biq_aB2]; biquadB[biq_bA1] = biquadB[biq_bB1]; biquadB[biq_bA2] = biquadB[biq_bB2]; biquadC[biq_aA0] = biquadC[biq_aB0]; biquadC[biq_aA1] = biquadC[biq_aB1]; biquadC[biq_aA2] = biquadC[biq_aB2]; biquadC[biq_bA1] = biquadC[biq_bB1]; biquadC[biq_bA2] = biquadC[biq_bB2]; biquadD[biq_aA0] = biquadD[biq_aB0]; biquadD[biq_aA1] = biquadD[biq_aB1]; biquadD[biq_aA2] = biquadD[biq_aB2]; biquadD[biq_bA1] = biquadD[biq_bB1]; biquadD[biq_bA2] = biquadD[biq_bB2]; biquadE[biq_aA0] = biquadE[biq_aB0]; biquadE[biq_aA1] = biquadE[biq_aB1]; biquadE[biq_aA2] = biquadE[biq_aB2]; biquadE[biq_bA1] = biquadE[biq_bB1]; biquadE[biq_bA2] = biquadE[biq_bB2]; biquadF[biq_aA0] = biquadF[biq_aB0]; biquadF[biq_aA1] = biquadF[biq_aB1]; biquadF[biq_aA2] = biquadF[biq_aB2]; biquadF[biq_bA1] = biquadF[biq_bB1]; biquadF[biq_bA2] = biquadF[biq_bB2]; biquadG[biq_aA0] = biquadG[biq_aB0]; biquadG[biq_aA1] = biquadG[biq_aB1]; biquadG[biq_aA2] = biquadG[biq_aB2]; biquadG[biq_bA1] = biquadG[biq_bB1]; biquadG[biq_bA2] = biquadG[biq_bB2]; //previous run through the buffer is still in the filter, so we move it //to the A section and now it's the new starting point. double K = tan(M_PI * biquadA[biq_freq]); double norm = 1.0 / (1.0 + K / biquadA[biq_reso] + K * K); biquadA[biq_aB0] = K * K * norm; biquadA[biq_aB1] = 2.0 * biquadA[biq_aB0]; biquadA[biq_aB2] = biquadA[biq_aB0]; biquadA[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadA[biq_bB2] = (1.0 - K / biquadA[biq_reso] + K * K) * norm; K = tan(M_PI * biquadB[biq_freq]); norm = 1.0 / (1.0 + K / biquadB[biq_reso] + K * K); biquadB[biq_aB0] = K * K * norm; biquadB[biq_aB1] = 2.0 * biquadB[biq_aB0]; biquadB[biq_aB2] = biquadB[biq_aB0]; biquadB[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadB[biq_bB2] = (1.0 - K / biquadB[biq_reso] + K * K) * norm; K = tan(M_PI * biquadC[biq_freq]); norm = 1.0 / (1.0 + K / biquadC[biq_reso] + K * K); biquadC[biq_aB0] = K * K * norm; biquadC[biq_aB1] = 2.0 * biquadC[biq_aB0]; biquadC[biq_aB2] = biquadC[biq_aB0]; biquadC[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadC[biq_bB2] = (1.0 - K / biquadC[biq_reso] + K * K) * norm; K = tan(M_PI * biquadD[biq_freq]); norm = 1.0 / (1.0 + K / biquadD[biq_reso] + K * K); biquadD[biq_aB0] = K * K * norm; biquadD[biq_aB1] = 2.0 * biquadD[biq_aB0]; biquadD[biq_aB2] = biquadD[biq_aB0]; biquadD[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadD[biq_bB2] = (1.0 - K / biquadD[biq_reso] + K * K) * norm; K = tan(M_PI * biquadE[biq_freq]); norm = 1.0 / (1.0 + K / biquadE[biq_reso] + K * K); biquadE[biq_aB0] = K * K * norm; biquadE[biq_aB1] = 2.0 * biquadE[biq_aB0]; biquadE[biq_aB2] = biquadE[biq_aB0]; biquadE[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadE[biq_bB2] = (1.0 - K / biquadE[biq_reso] + K * K) * norm; K = tan(M_PI * biquadF[biq_freq]); norm = 1.0 / (1.0 + K / biquadF[biq_reso] + K * K); biquadF[biq_aB0] = K * K * norm; biquadF[biq_aB1] = 2.0 * biquadF[biq_aB0]; biquadF[biq_aB2] = biquadF[biq_aB0]; biquadF[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadF[biq_bB2] = (1.0 - K / biquadF[biq_reso] + K * K) * norm; K = tan(M_PI * biquadG[biq_freq]); norm = 1.0 / (1.0 + K / biquadG[biq_reso] + K * K); biquadG[biq_aB0] = K * K * norm; biquadG[biq_aB1] = 2.0 * biquadG[biq_aB0]; biquadG[biq_aB2] = biquadG[biq_aB0]; biquadG[biq_bB1] = 2.0 * (K * K - 1.0) * norm; biquadG[biq_bB2] = (1.0 - K / biquadG[biq_reso] + K * K) * norm; bool bypass = (A == 1.0); highA = highB; highB = C*reso; if (highB > 0.0) bypass = false; lowA = lowB; lowB = D*reso; if (lowB < 1.0) bypass = false; 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; double drySampleL = inputSampleL; double drySampleR = inputSampleR; double temp = (double)sampleFrames/inFramesToProcess; biquadA[biq_a0] = (biquadA[biq_aA0]*temp)+(biquadA[biq_aB0]*(1.0-temp)); biquadA[biq_a1] = (biquadA[biq_aA1]*temp)+(biquadA[biq_aB1]*(1.0-temp)); biquadA[biq_a2] = (biquadA[biq_aA2]*temp)+(biquadA[biq_aB2]*(1.0-temp)); biquadA[biq_b1] = (biquadA[biq_bA1]*temp)+(biquadA[biq_bB1]*(1.0-temp)); biquadA[biq_b2] = (biquadA[biq_bA2]*temp)+(biquadA[biq_bB2]*(1.0-temp)); biquadB[biq_a0] = (biquadB[biq_aA0]*temp)+(biquadB[biq_aB0]*(1.0-temp)); biquadB[biq_a1] = (biquadB[biq_aA1]*temp)+(biquadB[biq_aB1]*(1.0-temp)); biquadB[biq_a2] = (biquadB[biq_aA2]*temp)+(biquadB[biq_aB2]*(1.0-temp)); biquadB[biq_b1] = (biquadB[biq_bA1]*temp)+(biquadB[biq_bB1]*(1.0-temp)); biquadB[biq_b2] = (biquadB[biq_bA2]*temp)+(biquadB[biq_bB2]*(1.0-temp)); biquadC[biq_a0] = (biquadC[biq_aA0]*temp)+(biquadC[biq_aB0]*(1.0-temp)); biquadC[biq_a1] = (biquadC[biq_aA1]*temp)+(biquadC[biq_aB1]*(1.0-temp)); biquadC[biq_a2] = (biquadC[biq_aA2]*temp)+(biquadC[biq_aB2]*(1.0-temp)); biquadC[biq_b1] = (biquadC[biq_bA1]*temp)+(biquadC[biq_bB1]*(1.0-temp)); biquadC[biq_b2] = (biquadC[biq_bA2]*temp)+(biquadC[biq_bB2]*(1.0-temp)); biquadD[biq_a0] = (biquadD[biq_aA0]*temp)+(biquadD[biq_aB0]*(1.0-temp)); biquadD[biq_a1] = (biquadD[biq_aA1]*temp)+(biquadD[biq_aB1]*(1.0-temp)); biquadD[biq_a2] = (biquadD[biq_aA2]*temp)+(biquadD[biq_aB2]*(1.0-temp)); biquadD[biq_b1] = (biquadD[biq_bA1]*temp)+(biquadD[biq_bB1]*(1.0-temp)); biquadD[biq_b2] = (biquadD[biq_bA2]*temp)+(biquadD[biq_bB2]*(1.0-temp)); biquadE[biq_a0] = (biquadE[biq_aA0]*temp)+(biquadE[biq_aB0]*(1.0-temp)); biquadE[biq_a1] = (biquadE[biq_aA1]*temp)+(biquadE[biq_aB1]*(1.0-temp)); biquadE[biq_a2] = (biquadE[biq_aA2]*temp)+(biquadE[biq_aB2]*(1.0-temp)); biquadE[biq_b1] = (biquadE[biq_bA1]*temp)+(biquadE[biq_bB1]*(1.0-temp)); biquadE[biq_b2] = (biquadE[biq_bA2]*temp)+(biquadE[biq_bB2]*(1.0-temp)); biquadF[biq_a0] = (biquadF[biq_aA0]*temp)+(biquadF[biq_aB0]*(1.0-temp)); biquadF[biq_a1] = (biquadF[biq_aA1]*temp)+(biquadF[biq_aB1]*(1.0-temp)); biquadF[biq_a2] = (biquadF[biq_aA2]*temp)+(biquadF[biq_aB2]*(1.0-temp)); biquadF[biq_b1] = (biquadF[biq_bA1]*temp)+(biquadF[biq_bB1]*(1.0-temp)); biquadF[biq_b2] = (biquadF[biq_bA2]*temp)+(biquadF[biq_bB2]*(1.0-temp)); biquadG[biq_a0] = (biquadG[biq_aA0]*temp)+(biquadG[biq_aB0]*(1.0-temp)); biquadG[biq_a1] = (biquadG[biq_aA1]*temp)+(biquadG[biq_aB1]*(1.0-temp)); biquadG[biq_a2] = (biquadG[biq_aA2]*temp)+(biquadG[biq_aB2]*(1.0-temp)); biquadG[biq_b1] = (biquadG[biq_bA1]*temp)+(biquadG[biq_bB1]*(1.0-temp)); biquadG[biq_b2] = (biquadG[biq_bA2]*temp)+(biquadG[biq_bB2]*(1.0-temp)); //this is the interpolation code for the biquad double high = (highA*temp)+(highB*(1.0-temp)); double low = (lowA*temp)+(lowB*(1.0-temp)); double outSample = (inputSampleL * biquadA[biq_a0]) + biquadA[biq_sL1]; biquadA[biq_sL1] = (inputSampleL * biquadA[biq_a1]) - (outSample * biquadA[biq_b1]) + biquadA[biq_sL2]; biquadA[biq_sL2] = (inputSampleL * biquadA[biq_a2]) - (outSample * biquadA[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadA[biq_a0]) + biquadA[biq_sR1]; biquadA[biq_sR1] = (inputSampleR * biquadA[biq_a1]) - (outSample * biquadA[biq_b1]) + biquadA[biq_sR2]; biquadA[biq_sR2] = (inputSampleR * biquadA[biq_a2]) - (outSample * biquadA[biq_b2]); inputSampleR = outSample; outSample = (inputSampleL * biquadB[biq_a0]) + biquadB[biq_sL1]; biquadB[biq_sL1] = (inputSampleL * biquadB[biq_a1]) - (outSample * biquadB[biq_b1]) + biquadB[biq_sL2]; biquadB[biq_sL2] = (inputSampleL * biquadB[biq_a2]) - (outSample * biquadB[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadB[biq_a0]) + biquadB[biq_sR1]; biquadB[biq_sR1] = (inputSampleR * biquadB[biq_a1]) - (outSample * biquadB[biq_b1]) + biquadB[biq_sR2]; biquadB[biq_sR2] = (inputSampleR * biquadB[biq_a2]) - (outSample * biquadB[biq_b2]); inputSampleR = outSample; outSample = (inputSampleL * biquadC[biq_a0]) + biquadC[biq_sL1]; biquadC[biq_sL1] = (inputSampleL * biquadC[biq_a1]) - (outSample * biquadC[biq_b1]) + biquadC[biq_sL2]; biquadC[biq_sL2] = (inputSampleL * biquadC[biq_a2]) - (outSample * biquadC[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadC[biq_a0]) + biquadC[biq_sR1]; biquadC[biq_sR1] = (inputSampleR * biquadC[biq_a1]) - (outSample * biquadC[biq_b1]) + biquadC[biq_sR2]; biquadC[biq_sR2] = (inputSampleR * biquadC[biq_a2]) - (outSample * biquadC[biq_b2]); inputSampleR = outSample; outSample = (inputSampleL * biquadD[biq_a0]) + biquadD[biq_sL1]; biquadD[biq_sL1] = (inputSampleL * biquadD[biq_a1]) - (outSample * biquadD[biq_b1]) + biquadD[biq_sL2]; biquadD[biq_sL2] = (inputSampleL * biquadD[biq_a2]) - (outSample * biquadD[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadD[biq_a0]) + biquadD[biq_sR1]; biquadD[biq_sR1] = (inputSampleR * biquadD[biq_a1]) - (outSample * biquadD[biq_b1]) + biquadD[biq_sR2]; biquadD[biq_sR2] = (inputSampleR * biquadD[biq_a2]) - (outSample * biquadD[biq_b2]); inputSampleR = outSample; outSample = (inputSampleL * biquadE[biq_a0]) + biquadE[biq_sL1]; biquadE[biq_sL1] = (inputSampleL * biquadE[biq_a1]) - (outSample * biquadE[biq_b1]) + biquadE[biq_sL2]; biquadE[biq_sL2] = (inputSampleL * biquadE[biq_a2]) - (outSample * biquadE[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadE[biq_a0]) + biquadE[biq_sR1]; biquadE[biq_sR1] = (inputSampleR * biquadE[biq_a1]) - (outSample * biquadE[biq_b1]) + biquadE[biq_sR2]; biquadE[biq_sR2] = (inputSampleR * biquadE[biq_a2]) - (outSample * biquadE[biq_b2]); inputSampleR = outSample; outSample = (inputSampleL * biquadF[biq_a0]) + biquadF[biq_sL1]; biquadF[biq_sL1] = (inputSampleL * biquadF[biq_a1]) - (outSample * biquadF[biq_b1]) + biquadF[biq_sL2]; biquadF[biq_sL2] = (inputSampleL * biquadF[biq_a2]) - (outSample * biquadF[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadF[biq_a0]) + biquadF[biq_sR1]; biquadF[biq_sR1] = (inputSampleR * biquadF[biq_a1]) - (outSample * biquadF[biq_b1]) + biquadF[biq_sR2]; biquadF[biq_sR2] = (inputSampleR * biquadF[biq_a2]) - (outSample * biquadF[biq_b2]); inputSampleR = outSample; outSample = (inputSampleL * biquadG[biq_a0]) + biquadG[biq_sL1]; biquadG[biq_sL1] = (inputSampleL * biquadG[biq_a1]) - (outSample * biquadG[biq_b1]) + biquadG[biq_sL2]; biquadG[biq_sL2] = (inputSampleL * biquadG[biq_a2]) - (outSample * biquadG[biq_b2]); inputSampleL = outSample; outSample = (inputSampleR * biquadG[biq_a0]) + biquadG[biq_sR1]; biquadG[biq_sR1] = (inputSampleR * biquadG[biq_a1]) - (outSample * biquadG[biq_b1]) + biquadG[biq_sR2]; biquadG[biq_sR2] = (inputSampleR * biquadG[biq_a2]) - (outSample * biquadG[biq_b2]); inputSampleR = outSample; if (bypass) { inputSampleL = drySampleL; inputSampleR = drySampleR; } else { inputSampleL = (inputSampleL * low) + ((drySampleL - inputSampleL)*high); inputSampleR = (inputSampleR * low) + ((drySampleR - inputSampleR)*high); } //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++; } }