1 /* Copyright (C) 2013 Robin Gareus <robin@gareus.org> 2 * 3 * This program is free software; you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License as published by 5 * the Free Software Foundation; either version 2, or (at your option) 6 * any later version. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program; if not, write to the Free Software Foundation, 15 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 16 */ 17 18 19 20 #ifndef __TRUEPEAKDSP_H 21 #define __TRUEPEAKDSP_H 22 23 #include "jmeterdsp.h" 24 #include "../zita-resampler/resampler.h" 25 26 namespace LV2M { 27 28 class TruePeakdsp : public JmeterDSP 29 { 30 public: 31 32 TruePeakdsp (void); 33 ~TruePeakdsp (void); 34 35 void process (float *p, int n); 36 void process_max (float *p, int n); 37 float read (void); 38 void read (float &m, float &p); 39 void reset (void); 40 41 void init (float fsamp); 42 43 private: 44 45 float _m; 46 float _p; 47 float _z1; 48 float _z2; 49 bool _res; 50 float *_buf; 51 Resampler _src; 52 53 float _w1; // attack filter coefficient 54 float _w2; // attack filter coefficient 55 float _w3; // release filter coefficient 56 float _g; // gain factor 57 }; 58 59 }; 60 61 62 #endif 63