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Diffstat (limited to 'libs/ardour/ardour/vumeterdsp.h')
-rw-r--r-- | libs/ardour/ardour/vumeterdsp.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/libs/ardour/ardour/vumeterdsp.h b/libs/ardour/ardour/vumeterdsp.h new file mode 100644 index 0000000000..86487e8e8e --- /dev/null +++ b/libs/ardour/ardour/vumeterdsp.h @@ -0,0 +1,49 @@ +/* + 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 + + +class Vumeterdsp +{ +public: + + Vumeterdsp (void); + ~Vumeterdsp (void); + + void process (float *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 |