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/*
Copyright (C) 2012 Fons Adriaensen <fons@linuxaudio.org>
Adopted for Ardour 2013 by 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., 675 Mass Ave, Cambridge, MA 02139, 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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