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/*
Cabinet.h
Copyright 2002-13 Tim Goetze <tim@quitte.de>
http://quitte.de/dsp/
CabinetII - 32nd order IIR filters modeled after existing impulse responses
for 44.1 / 48 / 88.2 / 96 kHz sample rates, switched at runtime.
CabinetIV - IIR/FIR combination filters for cabinet emulation, following
Bank's parfilt approach, see
Balázs Bank,
"Direct Design of Parallel Second-Order Filters for Instrument Body Modeling",
Proc. of the Int. Computer Music Conference (ICMC07)
Copenhagen, Denmark, Aug. 2007, vol. I., pp. 458-465.
*/
/*
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 3
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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA or point your web browser to http://www.gnu.org.
*/
#ifndef CABINET_H
#define CABINET_H
#include "dsp/util.h"
#include "dsp/BiQuad.h"
#include "dsp/Oversampler.h"
#include "dsp/v4f.h"
#include "dsp/v4f_FIR.h"
#include "dsp/v4f_BiQuad.h"
typedef double cabinet_float;
typedef struct {
int n;
cabinet_float a[32], b[32];
float gain;
} Model32;
/* Second version with 32nd order filters precalculated for
* 44.1 / 48 / 88.2 / 96 kHz sample rates */
class CabinetII
: public Plugin
{
public:
sample_t gain;
static Model32 models44100 [];
static Model32 models48000 [];
static Model32 models88200 [];
static Model32 models96000 [];
Model32 * models;
int model;
void switch_model (int m);
int n, h;
cabinet_float * a, * b;
cabinet_float x[32], y[32];
template <yield_func_t F>
void cycle (uint frames);
public:
static PortInfo port_info [];
void init();
void activate();
void run (uint n) { cycle<store_func> (n); }
void run_adding (uint n) { cycle<adding_func> (n); }
};
/* /////////////////////////////////////////////////////////////////////// */
template <uint N, uint FIR>
class ParModel {
public:
float gain;
float a1[4*N], a2[4*N], b1[4*N], b2[4*N];
float fir[FIR];
};
class CabinetIII
: public Plugin
{
public:
enum {
N = 128/4, /* number of bands/4 */
FIR = 128 /* FIR filter taps */
};
int model;
static ParModel<N,FIR> models [];
void switch_model (int m);
sample_t gain;
DSP::BiQuad4fBank<N> bank;
DSP::FIR4f<FIR> fir;
template <yield_func_t F>
void cycle (uint frames);
public:
static PortInfo port_info [];
void init();
void activate();
void run (uint n) { cycle<store_func> (n); }
void run_adding (uint n) { cycle<adding_func> (n); }
};
class CabinetIV
: public Plugin
{
public:
uint remain; /* when oversampling, an oversampling cycle may be incomplete */
int over; /* oversampling ratio */
DSP::Oversampler<2,32> over2;
DSP::Oversampler<4,64> over4;
int model;
void switch_model (int m);
enum {
N = 64/4, /* number of bands/4 */
FIR = 128 /* FIR filter taps */
};
DSP::BiQuad4fBank<N> bank;
DSP::FIR4f<FIR> fir;
double gain;
template <yield_func_t F>
void cycle (uint frames);
template <yield_func_t F, class O, int Ratio>
void cycle (uint frames, O & Over);
public:
static PortInfo port_info [];
void init();
void activate();
void run (uint n) { cycle<store_func> (n); }
void run_adding (uint n) { cycle<adding_func> (n); }
};
#endif /* CABINET_H */
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