source/modules/zita-resampler/cresampler.h

   1 // ----------------------------------------------------------------------------
   2 //
   3 //  Copyright (C) 2013 Fons Adriaensen <fons@linuxaudio.org>
   4 //
   5 //  This program is free software; you can redistribute it and/or modify
   6 //  it under the terms of the GNU General Public License as published by
   7 //  the Free Software Foundation; either version 3 of the License, or
   8 //  (at your option) any later version.
   9 //
  10 //  This program is distributed in the hope that it will be useful,
  11 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 //  GNU General Public License for more details.
  14 //
  15 //  You should have received a copy of the GNU General Public License
  16 //  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 //
  18 // ----------------------------------------------------------------------------
  19
  20
  21 #ifndef __CRESAMPLER_H
  22 #define __CRESAMPLER_H
  23
  24
  25 class CResampler
  26 {
  27 public:
  28
  29     CResampler (void);
  30     ~CResampler (void);
  31
  32     int  setup (double       ratio,
  33                 unsigned int nchan);
  34
  35     void   clear (void);
  36     int    reset (void);
  37     int    nchan (void) const { return _nchan; }
  38     int    inpsize (void) const;
  39     double inpdist (void) const;
  40     int    process (void);
  41
  42     void set_ratio (double r);
  43     void set_phase (double p);
  44
  45     unsigned int         inp_count;
  46     unsigned int         out_count;
  47     float               *inp_data;
  48     float               *out_data;
  49     void                *inp_list;
  50     void                *out_list;
  51
  52 private:
  53
  54     unsigned int         _nchan;
  55     unsigned int         _inmax;
  56     unsigned int         _index;
  57     unsigned int         _nread;
  58     unsigned int         _nzero;
  59     double               _phase;
  60     double               _pstep;
  61     float               *_buff;
  62 };
  63
  64
  65 #endif