54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
/*
|
|
* Copyright (C) 2012 Fons Adriaensen <fons@linuxaudio.org>
|
|
* Copyright (C) 2013-2014 Paul Davis <paul@linuxaudiosystems.com>
|
|
* Copyright (C) 2013-2019 Robin Gareus <robin@gareus.org>
|
|
*
|
|
* 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.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#ifndef __IEC2PPMDSP_H
|
|
#define __IEC2PPMDSP_H
|
|
|
|
#include "ardour/libardour_visibility.h"
|
|
|
|
class LIBARDOUR_API Iec2ppmdsp
|
|
{
|
|
public:
|
|
|
|
Iec2ppmdsp (void);
|
|
~Iec2ppmdsp (void);
|
|
|
|
void process (float const *p, int n);
|
|
float read (void);
|
|
void reset ();
|
|
|
|
static void init (float fsamp);
|
|
|
|
private:
|
|
|
|
float _z1; // filter state
|
|
float _z2; // filter state
|
|
float _m; // max value since last read()
|
|
bool _res; // flag to reset m
|
|
|
|
static float _w1; // attack filter coefficient
|
|
static float _w2; // attack filter coefficient
|
|
static float _w3; // release filter coefficient
|
|
static float _g; // gain factor
|
|
};
|
|
|
|
|
|
#endif
|