54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
/*
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* Copyright (C) 2012 Fons Adriaensen <fons@linuxaudio.org>
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* Copyright (C) 2013-2014 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2013-2019 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __IEC1PPMDSP_H
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#define __IEC1PPMDSP_H
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#include "ardour/libardour_visibility.h"
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class LIBARDOUR_API Iec1ppmdsp
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{
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public:
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Iec1ppmdsp (void);
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~Iec1ppmdsp (void);
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void process (float const *p, int n);
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float read (void);
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void reset ();
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static void init (float fsamp);
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private:
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float _z1; // filter state
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float _z2; // filter state
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float _m; // max value since last read()
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bool _res; // flag to reset m
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static float _w1; // attack filter coefficient
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static float _w2; // attack filter coefficient
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static float _w3; // release filter coefficient
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static float _g; // gain factor
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};
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#endif
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