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/*
* ZamEQ2 2 band parametric equaliser
* Copyright (C) 2014 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 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.
*/
#ifndef ZAMEQ2PLUGIN_HPP_INCLUDED
#define ZAMEQ2PLUGIN_HPP_INCLUDED
#include "DistrhoPlugin.hpp"
START_NAMESPACE_DISTRHO
// -----------------------------------------------------------------------
class ZamEQ2Plugin : public Plugin
{
public:
enum Parameters
{
paramGain1 = 0,
paramQ1,
paramFreq1,
paramGain2,
paramQ2,
paramFreq2,
paramGainL,
paramFreqL,
paramGainH,
paramFreqH,
paramMaster,
paramTogglePeaks,
paramCount
};
ZamEQ2Plugin();
protected:
// -------------------------------------------------------------------
// Information
const char* getLabel() const noexcept override
{
return "ZamEQ2";
}
const char* getDescription() const noexcept override
{
return "Two band parametric equaliser with high and low shelving circuits.";
}
const char* getMaker() const noexcept override
{
return "Damien Zammit";
}
const char* getHomePage() const noexcept override
{
return "http://www.zamaudio.com";
}
const char* getLicense() const noexcept override
{
return "GPL v2+";
}
uint32_t getVersion() const noexcept override
{
return d_version(3, 7, 0);
}
int64_t getUniqueId() const noexcept override
{
return d_cconst('Z', 'E', 'Q', '2');
}
// -------------------------------------------------------------------
// Init
void initParameter(uint32_t index, Parameter& parameter) ;
void initProgramName(uint32_t index, String& programName) ;
// -------------------------------------------------------------------
// Internal data
float getParameterValue(uint32_t index) const override;
void setParameterValue(uint32_t index, float value) override;
void loadProgram(uint32_t index) override;
// -------------------------------------------------------------------
// Process
static inline double
sanitize_denormal(double v) {
if(!std::isnormal(v))
return 0.f;
return v;
}
static inline double
from_dB(double gdb) {
return (exp(gdb/20.f*log(10.f)));
}
static inline double
to_dB(double g) {
return (20.f*log10(g));
}
static inline int
sign(double x) {
return (x >= 0.f ? 1 : -1);
}
void activate() override;
void run(const float** inputs, float** outputs, uint32_t frames) override;
void 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);
void lowshelfeq(double G0, double G, double GB,
double w0, double Dw, double q, double B[], double A[]);
void highshelfeq(double G0, double G, double GB,
double w0, double Dw, double q, double B[], double A[]);
// -------------------------------------------------------------------
private:
float gain1,q1,freq1,gain2,q2,freq2,gainl,freql,gainh,freqh,master,togglepeaks; //parameters
double x1,x2,y1,y2;
double x1a,x2a,y1a,y2a;
double zln1,zln2,zld1,zld2;
double zhn1,zhn2,zhd1,zhd2;
double a0x,a1x,a2x,b0x,b1x,b2x,gainx;
double a0y,a1y,a2y,b0y,b1y,b2y,gainy;
double Bl[3];
double Al[3];
double Bh[3];
double Ah[3];
};
// -----------------------------------------------------------------------
END_NAMESPACE_DISTRHO
#endif // ZAMEQ2_HPP_INCLUDED
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