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ZamDynamicEQPlugin.cpp
757 lines (688 loc) · 20.7 KB
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ZamDynamicEQPlugin.cpp
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/*
* ZamDynamicEQ
* Copyright (C) 2016 Damien Zammit <damien@zamaudio.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "ZamDynamicEQPlugin.hpp"
START_NAMESPACE_DISTRHO
// -----------------------------------------------------------------------
ZamDynamicEQPlugin::ZamDynamicEQPlugin()
: Plugin(paramCount, 2, 0)
{
// set default values
loadProgram(0);
}
void ZamDynamicEQPlugin::initProgramName(uint32_t index, String& programName)
{
switch(index) {
case 0:
programName = "Zero";
break;
case 1:
programName = "PoppySnare";
break;
case 2:
programName = "VocalLeveller";
break;
}
}
// -----------------------------------------------------------------------
// Process
void ZamDynamicEQPlugin::reset_low()
{
zln1=zln2=zld1=zld2=0.f;
}
void ZamDynamicEQPlugin::reset_high()
{
zhn1=zhn2=zhd1=zhd2=0.f;
}
void ZamDynamicEQPlugin::reset_peak()
{
x1a=x2a=y1a=y2a=0.f;
}
void ZamDynamicEQPlugin::activate()
{
oldL_yl = oldL_y1 = oldL_yg = 0.f;
gainy = 0.f;
reset_low();
reset_high();
reset_peak();
linear_svf_reset(&bandpass);
}
void ZamDynamicEQPlugin::initParameter(uint32_t index, Parameter& parameter)
{
switch (index)
{
case paramAttack:
parameter.hints = kParameterIsAutomatable;
parameter.name = "Attack";
parameter.symbol = "att";
parameter.unit = "ms";
parameter.ranges.def = 10.0f;
parameter.ranges.min = 0.1f;
parameter.ranges.max = 100.0f;
break;
case paramRelease:
parameter.hints = kParameterIsAutomatable;
parameter.name = "Release";
parameter.symbol = "rel";
parameter.unit = "ms";
parameter.ranges.def = 80.0f;
parameter.ranges.min = 1.0f;
parameter.ranges.max = 500.0f;
break;
case paramKnee:
parameter.hints = kParameterIsAutomatable;
parameter.name = "Knee";
parameter.symbol = "kn";
parameter.unit = "dB";
parameter.ranges.def = 0.0f;
parameter.ranges.min = 0.0f;
parameter.ranges.max = 8.0f;
break;
case paramRatio:
parameter.hints = kParameterIsAutomatable | kParameterIsLogarithmic;
parameter.name = "Ratio";
parameter.symbol = "rat";
parameter.unit = " ";
parameter.ranges.def = 1.5f;
parameter.ranges.min = 1.0f;
parameter.ranges.max = 5.0f;
break;
case paramThresh:
parameter.hints = kParameterIsAutomatable;
parameter.name = "Threshold";
parameter.symbol = "thr";
parameter.unit = "dB";
parameter.ranges.def = 0.0f;
parameter.ranges.min = -80.0f;
parameter.ranges.max = 0.0f;
break;
case paramMaxBoostCut:
parameter.hints = kParameterIsAutomatable;
parameter.name = "Max Boost/Cut";
parameter.symbol = "max";
parameter.unit = "dB";
parameter.ranges.def = 10.0f;
parameter.ranges.min = 0.0f;
parameter.ranges.max = 10.0f;
break;
case paramSlew:
parameter.hints = kParameterIsAutomatable;
parameter.name = "Slew";
parameter.symbol = "slew";
parameter.unit = " ";
parameter.ranges.def = 1.0f;
parameter.ranges.min = 1.0f;
parameter.ranges.max = 150.0f;
break;
case paramSidechain:
parameter.hints = kParameterIsAutomatable | kParameterIsBoolean;
parameter.name = "Sidechain";
parameter.symbol = "sidech";
parameter.unit = " ";
parameter.ranges.def = 0.0f;
parameter.ranges.min = 0.0f;
parameter.ranges.max = 1.0f;
break;
case paramToggleLow:
parameter.hints = kParameterIsAutomatable | kParameterIsBoolean;
parameter.name = "Low Shelf";
parameter.symbol = "togglelow";
parameter.unit = " ";
parameter.ranges.def = 0.0f;
parameter.ranges.min = 0.0f;
parameter.ranges.max = 1.0f;
break;
case paramTogglePeak:
parameter.hints = kParameterIsAutomatable | kParameterIsBoolean;
parameter.name = "Peak";
parameter.symbol = "togglepeak";
parameter.unit = " ";
parameter.ranges.def = 0.0f;
parameter.ranges.min = 0.0f;
parameter.ranges.max = 1.0f;
break;
case paramToggleHigh:
parameter.hints = kParameterIsAutomatable | kParameterIsBoolean;
parameter.name = "High Shelf";
parameter.symbol = "togglehigh";
parameter.unit = " ";
parameter.ranges.def = 0.0f;
parameter.ranges.min = 0.0f;
parameter.ranges.max = 1.0f;
break;
case paramDetectFreq:
parameter.hints = kParameterIsAutomatable | kParameterIsLogarithmic;
parameter.name = "Detect Frequency";
parameter.symbol = "detectfreq";
parameter.unit = "Hz";
parameter.ranges.def = 1000.0f;
parameter.ranges.min = 20.0f;
parameter.ranges.max = 16000.0f;
break;
case paramTargetFreq:
parameter.hints = kParameterIsAutomatable | kParameterIsLogarithmic;
parameter.name = "Target Frequency";
parameter.symbol = "targetfreq";
parameter.unit = "Hz";
parameter.ranges.def = 1000.0f;
parameter.ranges.min = 20.0f;
parameter.ranges.max = 16000.0f;
break;
case paramTargetWidth:
parameter.hints = kParameterIsAutomatable;
parameter.name = "Target width";
parameter.symbol = "targetwidth";
parameter.unit = "oct";
parameter.ranges.def = 1.0f;
parameter.ranges.min = 1.0f;
parameter.ranges.max = 5.0f;
break;
case paramBoostCut:
parameter.hints = kParameterIsAutomatable | kParameterIsBoolean;
parameter.name = "Boost / Cut";
parameter.symbol = "boostcut";
parameter.unit = " ";
parameter.ranges.def = 0.0f;
parameter.ranges.min = 0.0f;
parameter.ranges.max = 1.0f;
break;
case paramControlGain:
parameter.hints = kParameterIsOutput;
parameter.name = "Control Gain";
parameter.symbol = "controlgain";
parameter.unit = "dB";
parameter.ranges.def = 0.0f;
parameter.ranges.min = -10.0f;
parameter.ranges.max = 0.0f;
break;
}
}
void ZamDynamicEQPlugin::initAudioPort(bool input, uint32_t index, AudioPort& port)
{
Plugin::initAudioPort(input, index, port);
if ((index == 1) && input) {
port.hints |= kAudioPortIsSidechain;
port.name = "Sidechain Input";
port.symbol = "sidechain_in";
}
}
void ZamDynamicEQPlugin::loadProgram(uint32_t index)
{
switch(index) {
case 0:
attack = 10.0;
release = 80.0;
knee = 0.0;
ratio = 1.5;
thresdb = 0.0;
max = 10.0;
slewfactor = 1.0;
sidechain = 0.0;
detectfreq = 1000.0;
targetfreq = 1000.0;
targetwidth = 1.0;
controlgain = 0.0;
boostcut = 0.0;
togpeak = 1.0;
toglow = 0.0;
toghigh = 0.0;
break;
case 1:
attack = 10.0;
release = 10.0;
knee = 1.0;
ratio = 1.5;
thresdb = -18.0;
max = 10.0;
slewfactor = 20.0;
sidechain = 0.0;
detectfreq = 1000.0;
targetfreq = 1000.0;
targetwidth = 1.0;
controlgain = 0.0;
boostcut = 0.0;
togpeak = 1.0;
toglow = 0.0;
toghigh = 0.0;
break;
case 2:
attack = 50.0;
release = 400.0;
knee = 8.0;
ratio = 1.5;
thresdb = -16.0;
max = 10.0;
slewfactor = 1.0;
sidechain = 0.0;
detectfreq = 1000.0;
targetfreq = 1000.0;
targetwidth = 1.0;
controlgain = 0.0;
boostcut = 0.0;
togpeak = 1.0;
toglow = 0.0;
toghigh = 0.0;
break;
}
activate();
}
// -----------------------------------------------------------------------
// Internal data
float ZamDynamicEQPlugin::getParameterValue(uint32_t index) const
{
switch (index)
{
case paramAttack:
return attack;
break;
case paramRelease:
return release;
break;
case paramKnee:
return knee;
break;
case paramRatio:
return ratio;
break;
case paramThresh:
return thresdb;
break;
case paramMaxBoostCut:
return max;
break;
case paramSlew:
return slewfactor;
break;
case paramSidechain:
return sidechain;
break;
case paramToggleLow:
return toglow;
break;
case paramTogglePeak:
return togpeak;
break;
case paramToggleHigh:
return toghigh;
break;
case paramDetectFreq:
return detectfreq;
break;
case paramTargetFreq:
return targetfreq;
break;
case paramTargetWidth:
return targetwidth;
break;
case paramBoostCut:
return boostcut;
break;
case paramControlGain:
return controlgain;
break;
default:
return 0.0f;
}
}
void ZamDynamicEQPlugin::setParameterValue(uint32_t index, float value)
{
switch (index)
{
case paramAttack:
attack = value;
break;
case paramRelease:
release = value;
break;
case paramKnee:
knee = value;
break;
case paramRatio:
ratio = value;
break;
case paramThresh:
thresdb = value;
break;
case paramMaxBoostCut:
max = value;
break;
case paramSlew:
slewfactor = value;
break;
case paramSidechain:
sidechain = value;
break;
case paramToggleLow:
toglow = value;
reset_low();
reset_high();
reset_peak();
break;
case paramTogglePeak:
togpeak = value;
reset_low();
reset_high();
reset_peak();
break;
case paramToggleHigh:
toghigh = value;
reset_low();
reset_high();
reset_peak();
break;
case paramDetectFreq:
detectfreq = value;
break;
case paramTargetFreq:
targetfreq = value;
break;
case paramTargetWidth:
targetwidth = value;
break;
case paramBoostCut:
boostcut = value;
reset_low();
reset_high();
reset_peak();
break;
case paramControlGain:
controlgain = value;
break;
}
}
/*
* bandpass SVF
* http://www.cytomic.com/files/dsp/SvfLinearTrapOptimised2.pdf
*/
void ZamDynamicEQPlugin::linear_svf_set_params(struct linear_svf *self, float sample_rate, float cutoff, float resonance)
{
self->g = tanf(M_PI * (cutoff / sample_rate));
self->k = 1.f / resonance;
self->a[0] = 1.f / (1.f + self->g * (self->g + self->k));
self->a[1] = self->g * self->a[0];
self->a[2] = self->g * self->a[1];
self->m[0] = 0.f;
self->m[1] = 1.f;
self->m[2] = 0.f;
}
void ZamDynamicEQPlugin::linear_svf_reset(struct linear_svf *self)
{
self->s[0][0] =
self->s[0][1] =
self->s[1][0] =
self->s[1][1] = 0.f;
}
float ZamDynamicEQPlugin::run_linear_svf(struct linear_svf *self, int c, float in)
{
float v[3];
v[2] = in - self->s[c][1];
v[0] = (self->a[0] * self->s[c][0]) + (self->a[1] * v[2]);
v[1] = self->s[c][1] + (self->a[1] * self->s[c][0]) + (self->a[2] * v[2]);
self->s[c][0] = (2.f * v[0]) - self->s[c][0];
self->s[c][1] = (2.f * v[1]) - self->s[c][1];
return
(self->m[0] * in)
+ (self->m[1] * v[0])
+ (self->m[2] * v[1]);
}
void ZamDynamicEQPlugin::peq(double G0, double G, double GB, double w0, double Dw,
double *a0, double *a1, double *a2, double *b0, double *b1, double *b2, double *gn) {
double F,G00,F00,num,den,G1,G01,G11,F01,F11,W2,Dww,C,D,B,A;
F = fabs(G*G - GB*GB);
G00 = fabs(G*G - G0*G0);
F00 = fabs(GB*GB - G0*G0);
num = G0*G0 * (w0*w0 - M_PI*M_PI)*(w0*w0 - M_PI*M_PI)
+ G*G * F00 * M_PI*M_PI * Dw*Dw / F;
den = (w0*w0 - M_PI*M_PI)*(w0*w0 - M_PI*M_PI)
+ F00 * M_PI*M_PI * Dw*Dw / F;
G1 = sqrt(num/den);
G01 = fabs(G*G - G0*G1);
G11 = fabs(G*G - G1*G1);
F01 = fabs(GB*GB - G0*G1);
F11 = fabs(GB*GB - G1*G1);
W2 = sqrt(G11 / G00) * tan(w0/2.f)*tan(w0/2.f);
Dww = (1.f + sqrt(F00 / F11) * W2) * tan(Dw/2.f);
C = F11 * Dww*Dww - 2.f * W2 * (F01 - sqrt(F00 * F11));
D = 2.f * W2 * (G01 - sqrt(G00 * G11));
A = sqrt((C + D) / F);
B = sqrt((G*G * C + GB*GB * D) / F);
*gn = G1;
*b0 = (G1 + G0*W2 + B) / (1.f + W2 + A);
*b1 = -2.f*(G1 - G0*W2) / (1.f + W2 + A);
*b2 = (G1 - B + G0*W2) / (1.f + W2 + A);
*a0 = 1.f;
*a1 = -2.f*(1.f - W2) / (1.f + W2 + A);
*a2 = (1 + W2 - A) / (1.f + W2 + A);
*b1 = sanitize_denormal(*b1);
*b2 = sanitize_denormal(*b2);
*a0 = sanitize_denormal(*a0);
*a1 = sanitize_denormal(*a1);
*a2 = sanitize_denormal(*a2);
*gn = sanitize_denormal(*gn);
if (!std::isnormal(*b0)) { *b0 = 1.f; }
}
void ZamDynamicEQPlugin::lowshelfeq(double, double G, double, double w0, double, double q, double B[], double A[]) {
double alpha,b0,b1,b2,a0,a1,a2;
G = powf(10.f,G/20.f);
double AA = sqrt(G);
alpha = sin(w0)/2.f * sqrt( (AA + 1.f/AA)*(1.f/q - 1.f) + 2.f );
b0 = AA*( (AA+1.f) - (AA-1.f)*cos(w0) + 2.f*sqrt(AA)*alpha );
b1 = 2.f*AA*( (AA-1.f) - (AA+1.f)*cos(w0) );
b2 = AA*( (AA+1.f) - (AA-1.f)*cos(w0) - 2.f*sqrt(AA)*alpha );
a0 = (AA+1.f) + (AA-1.f)*cos(w0) + 2.f*sqrt(AA)*alpha;
a1 = -2.f*( (AA-1.f) + (AA+1.f)*cos(w0) );
a2 = (AA+1.f) + (AA-1.f)*cos(w0) - 2.f*sqrt(AA)*alpha;
B[0] = b0/a0;
B[1] = b1/a0;
B[2] = b2/a0;
A[0] = 1.f;
A[1] = a1/a0;
A[2] = a2/a0;
}
void ZamDynamicEQPlugin::highshelfeq(double, double G, double, double w0, double, double q, double B[], double A[])
{
double alpha,b0,b1,b2,a0,a1,a2;
G = powf(10.f,G/20.f);
double AA = sqrt(G);
alpha = sin(w0)/2.f * sqrt( (AA + 1.f/AA)*(1.f/q - 1.f) + 2.f );
b0 = AA*( (AA+1.f) + (AA-1.f)*cos(w0) + 2.f*sqrt(AA)*alpha );
b1 = -2.f*AA*( (AA-1.f) + (AA+1.f)*cos(w0) );
b2 = AA*( (AA+1.f) + (AA-1.f)*cos(w0) - 2.f*sqrt(AA)*alpha );
a0 = (AA+1.f) - (AA-1.f)*cos(w0) + 2.f*sqrt(AA)*alpha;
a1 = 2.f*( (AA-1.f) - (AA+1.f)*cos(w0) );
a2 = (AA+1.f) - (AA-1.f)*cos(w0) - 2.f*sqrt(AA)*alpha;
B[0] = b0/a0;
B[1] = b1/a0;
B[2] = b2/a0;
A[0] = 1.f;
A[1] = a1/a0;
A[2] = a2/a0;
}
void ZamDynamicEQPlugin::run_lowshelf(double input, double* output)
{
double in = input;
zln1 = sanitize_denormal(zln1);
zln2 = sanitize_denormal(zln2);
zld1 = sanitize_denormal(zld1);
zld2 = sanitize_denormal(zld2);
in = sanitize_denormal(in);
*output = in * Bl[0] +
zln1 * Bl[1] +
zln2 * Bl[2] -
zld1 * Al[1] -
zld2 * Al[2] + 1e-20;
*output = sanitize_denormal(*output);
zln2 = zln1;
zld2 = zld1;
zln1 = in;
zld1 = *output;
}
void ZamDynamicEQPlugin::run_highshelf(double input, double* output)
{
double in = input;
zhn1 = sanitize_denormal(zhn1);
zhn2 = sanitize_denormal(zhn2);
zhd1 = sanitize_denormal(zhd1);
zhd2 = sanitize_denormal(zhd2);
in = sanitize_denormal(in);
*output = in * Bh[0] +
zhn1 * Bh[1] +
zhn2 * Bh[2] -
zhd1 * Ah[1] -
zhd2 * Ah[2] + 1e-20;
*output = sanitize_denormal(*output);
zhn2 = zhn1;
zhd2 = zhd1;
zhn1 = in;
zhd1 = *output;
}
void ZamDynamicEQPlugin::run_peq2(double input, double* output)
{
double in = input;
x1a = sanitize_denormal(x1a);
x2a = sanitize_denormal(x2a);
y1a = sanitize_denormal(y1a);
y2a = sanitize_denormal(y2a);
in = sanitize_denormal(in);
*output = in * b0y + x1a * b1y + x2a * b2y - y1a * a1y - y2a * a2y
+ 1e-20;
*output = sanitize_denormal(*output);
x2a = x1a;
y2a = y1a;
x1a = in;
y1a = *output;
}
void ZamDynamicEQPlugin::run_comp(double input, double* output)
{
float srate = getSampleRate();
float width = (6.f * knee) + 0.01;
float slewwidth = 1.8f;
float cdb=0.f;
float attack_coeff = exp(-1000.f/(attack * srate));
float release_coeff = exp(-1000.f/(release * srate));
int attslew = 0;
float lgaininp = 0.f;
float Lgain = 1.f;
float Lxg, Lxl, Lyg, Lyl, Ly1;
float checkwidth = 0.f;
float in;
in = input;
attslew = 0;
Lyg = 0.f;
Lxg = (in==0.f) ? -160.f : to_dB(fabs(in));
Lxg = sanitize_denormal(Lxg);
Lyg = Lxg + (1.f/ratio-1.f)*(Lxg-thresdb+width/2.f)*(Lxg-thresdb+width/2.f)/(2.f*width);
checkwidth = 2.f*fabs(Lxg-thresdb);
if (2.f*(Lxg-thresdb) < -width) {
Lyg = Lxg;
} else if (checkwidth <= width) {
Lyg = thresdb + (Lxg-thresdb)/ratio;
Lyg = sanitize_denormal(Lyg);
if (checkwidth <= slewwidth) {
if (Lyg >= oldL_yg) {
attslew = 1;
}
}
} else if (2.f*(Lxg-thresdb) > width) {
Lyg = thresdb + (Lxg-thresdb)/ratio;
Lyg = sanitize_denormal(Lyg);
}
attack_coeff = attslew ? exp(-1000.f/((attack + 2.0*(slewfactor - 1)) * srate)) : attack_coeff;
Lxl = Lxg - Lyg;
oldL_y1 = sanitize_denormal(oldL_y1);
oldL_yl = sanitize_denormal(oldL_yl);
Ly1 = fmaxf(Lxl, release_coeff * oldL_y1+(1.f-release_coeff)*Lxl);
Lyl = attack_coeff * oldL_yl+(1.f-attack_coeff)*Ly1;
Ly1 = sanitize_denormal(Ly1);
Lyl = sanitize_denormal(Lyl);
cdb = -Lyl;
Lgain = from_dB(cdb);
//gainred = Lyl;
lgaininp = Lgain * in;
*output = lgaininp;
oldL_yl = Lyl;
oldL_y1 = Ly1;
oldL_yg = Lyg;
}
void ZamDynamicEQPlugin::run(const float** inputs, float** outputs, uint32_t frames)
{
float srate = getSampleRate();
double dcgain = 1.f;
double qq2, boost2, fc2, w02, bwgain2, bw2;
double boostl, All, bwl, bwgaindbl;
double boosth, Ahh, bwh, bwgaindbh;
int choose = (sidechain < 0.5) ? 0 : 1;
float gaincontrol = 0.f;
linear_svf_set_params(&bandpass, srate, detectfreq, 4.);
uint32_t i;
for (i = 0; i < frames; i++) {
double tmp, filtered, out;
double in = inputs[0][i];
in = sanitize_denormal(in);
tmp = sanitize_denormal(inputs[choose][i]);
filtered = tmp;
out = in;
filtered = run_linear_svf(&bandpass, 0, tmp);
filtered = run_linear_svf(&bandpass, 1, filtered);
run_comp(filtered, &tmp);
gaincontrol = tmp / filtered;
controlgain = sanitize_denormal(to_dB(gaincontrol));
if (boostcut > 0.5) {
controlgain = -controlgain;
if (controlgain < 0.f)
controlgain = 0.f;
else if (controlgain > max)
controlgain = max;
} else {
if (controlgain > 0.f)
controlgain = 0.f;
else if (controlgain < -max)
controlgain = -max;
}
if (controlgain != 0.f) {
if (toglow) {
bwl = 2.f*M_PI*targetfreq / srate;
boostl = from_dB(controlgain);
All = sqrt(boostl);
bwgaindbl = to_dB(All);
lowshelfeq(0.f,controlgain,bwgaindbl,bwl,bwl,0.707f,Bl,Al);
run_lowshelf(in, &out);
} else if (togpeak) {
qq2 = pow(2.0, 1.0/targetwidth)/(pow(2.0, targetwidth) - 1.0); //q from octave bw
boost2 = from_dB(controlgain);
fc2 = targetfreq / srate;
w02 = fc2*2.f*M_PI;
bwgain2 = sqrt(boost2);
bw2 = fc2 / qq2;
peq(dcgain,boost2,bwgain2,w02,bw2,&a0y,&a1y,&a2y,&b0y,&b1y,&b2y,&gainy);
run_peq2(in, &out);
} else {
bwh = 2.f*M_PI*targetfreq / srate;
boosth = from_dB(controlgain);
Ahh = sqrt(boosth);
bwgaindbh = to_dB(Ahh);
highshelfeq(0.f,controlgain,bwgaindbh,bwh,bwh,0.707f,Bh,Ah);
run_highshelf(in, &out);
}
}
outputs[0][i] = (float) out;
}
}
// -----------------------------------------------------------------------
Plugin* createPlugin()
{
return new ZamDynamicEQPlugin();
}
// -----------------------------------------------------------------------
END_NAMESPACE_DISTRHO