mirror of
https://github.com/LMMS/lmms.git
synced 2026-02-05 04:04:10 -05:00
88 lines
1.7 KiB
C++
88 lines
1.7 KiB
C++
/*
|
|
Clip.h
|
|
|
|
Copyright 2004-5 Tim Goetze <tim@quitte.de>
|
|
|
|
http://quitte.de/dsp/
|
|
|
|
oversampled hard ('diode', 'transistor', sometimes 'op-amp') clipper.
|
|
|
|
*/
|
|
/*
|
|
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.
|
|
|
|
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 _CLIP_H_
|
|
#define _CLIP_H_
|
|
|
|
#include "dsp/util.h"
|
|
#include "dsp/FIR.h"
|
|
#include "dsp/sinc.h"
|
|
#include "dsp/windows.h"
|
|
|
|
class Clip
|
|
: public Plugin
|
|
{
|
|
public:
|
|
sample_t gain, gain_db;
|
|
|
|
sample_t threshold[2];
|
|
|
|
enum {
|
|
OVERSAMPLE = 8,
|
|
FIR_SIZE = 64,
|
|
};
|
|
|
|
/* antialias filters */
|
|
DSP::FIRUpsampler up;
|
|
DSP::FIR down;
|
|
|
|
template <sample_func_t F>
|
|
void one_cycle (int frames);
|
|
|
|
inline sample_t clip (sample_t x);
|
|
|
|
public:
|
|
static PortInfo port_info[];
|
|
|
|
Clip()
|
|
: up (FIR_SIZE, OVERSAMPLE),
|
|
down (FIR_SIZE)
|
|
{ }
|
|
|
|
void init();
|
|
|
|
void activate()
|
|
{
|
|
up.reset();
|
|
down.reset();
|
|
gain_db = *ports[1];
|
|
gain = DSP::db2lin (gain_db);
|
|
}
|
|
|
|
void run (int n)
|
|
{
|
|
one_cycle<store_func> (n);
|
|
}
|
|
|
|
void run_adding (int n)
|
|
{
|
|
one_cycle<adding_func> (n);
|
|
}
|
|
};
|
|
|
|
#endif /* _CLIP_H_ */
|