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/*
* 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 __VUMETERDSP_H
#define __VUMETERDSP_H
#include "ardour/libardour_visibility.h"
class LIBARDOUR_API Vumeterdsp
{
public:
Vumeterdsp (void);
~Vumeterdsp (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 _w; // lowpass filter coefficient
static float _g; // gain factor
};
#endif
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