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/*
* ZamDelay mono delay effect
* Copyright (C) 2015 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.
*/
#ifndef ZAMCOMPPLUGIN_HPP_INCLUDED
#define ZAMCOMPPLUGIN_HPP_INCLUDED
#include "DistrhoPlugin.hpp"
// 8 seconds of delay at 96kHz
#define MAX_DELAY 768000
#define MAX(a,b) ((a) < (b) ? (b) : (a))
#define MIN(a,b) ((a) > (b) ? (b) : (a))
#define LIN_INTERP(f,a,b) ((a) + (f) * ((b) - (a)))
START_NAMESPACE_DISTRHO
// -----------------------------------------------------------------------
class ZamDelayPlugin : public Plugin
{
public:
enum Parameters
{
paramInvert = 0,
paramDelaytime,
paramSync,
paramLPF,
paramDivisor,
paramGain,
paramDrywet,
paramFeedback,
paramDelaytimeout,
paramCount
};
ZamDelayPlugin();
protected:
// -------------------------------------------------------------------
// Information
const char* getLabel() const noexcept override
{
return "ZamDelay";
}
const char* getDescription() const noexcept override
{
return "A simple mono delay plugin";
}
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, 11, 0);
}
int64_t getUniqueId() const noexcept override
{
return d_cconst('Z', 'M', 'D', 'L');
}
// -------------------------------------------------------------------
// Init
void initParameter(uint32_t index, Parameter& parameter) override;
void initProgramName(uint32_t index, String& programName) override;
// -------------------------------------------------------------------
// Internal data
float getParameterValue(uint32_t index) const override;
void setParameterValue(uint32_t index, float value) override;
void loadProgram(uint32_t index);
// -------------------------------------------------------------------
// Process
static inline float
sanitize_denormal(float v) {
if(!std::isnormal(v))
return 0.f;
return v;
}
static inline float
from_dB(float gdb) {
return (exp(gdb/20.f*log(10.f)));
}
static inline float
to_dB(float g) {
return (20.f*log10(g));
}
void activate() override;
void run(const float** inputs, float** outputs, uint32_t frames) override;
void clearfilter(void);
void lpfRbj(float fc, float srate);
float runfilter(float in);
// -------------------------------------------------------------------
private:
float invert, feedb, delaytime, sync, lpf, divisor, gain, drywet, delaytimeout;
float invertold, feedbold, delaytimeold, syncold, lpfold, divisorold, gainold, drywetold, delaytimeoutold, delaysamplesold;
float z[MAX_DELAY];
unsigned int posz;
unsigned int tap[2];
int active;
int next;
int age;
float A0, A1, A2, A3, A4, A5, B0, B1, B2, B3, B4, B5;
float state[4];
float fbstate;
};
// -----------------------------------------------------------------------
END_NAMESPACE_DISTRHO
#endif // ZAMCOMP_HPP_INCLUDED
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