gtk2_ardour/fft_result.h

   1 /*
   2     Copyright (C) 2006 Paul Davis
   3         Written by Sampo Savolainen
   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 2 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, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20
  21 #ifndef __ardour_fft_result_h
  22 #define __ardour_fft_result_h
  23
  24 #include "ardour/types.h"
  25 #include <fftw3.h>
  26
  27 #include <gdkmm/color.h>
  28
  29 #include <string>
  30
  31 class FFTGraph;
  32
  33 class FFTResult
  34 {
  35         public:
  36
  37                 ~FFTResult();
  38
  39                 void analyzeWindow(float *window);
  40                 void finalize();
  41
  42                 int length() const { return _dataSize; }
  43
  44                 float avgAt(int x);
  45                 float maxAt(int x);
  46                 float minAt(int x);
  47
  48                 float minimum() const { return _minimum; }
  49                 float maximum() const { return _maximum; }
  50
  51                 Gdk::Color get_color() const { return _color; }
  52
  53         private:
  54                 FFTResult(FFTGraph *graph, Gdk::Color color, std::string trackname);
  55
  56                 int     _averages;
  57
  58                 float*  _data_avg;
  59                 float*  _data_max;
  60                 float*  _data_min;
  61
  62                 float*  _work;
  63
  64                 int     _windowSize;
  65                 int     _dataSize;
  66
  67                 float   _minimum;
  68                 float   _maximum;
  69
  70                 FFTGraph *_graph;
  71
  72                 Gdk::Color _color;
  73                 std::string _trackname;
  74
  75         friend class FFTGraph;
  76 };
  77
  78 #endif /* __ardour_fft_result_h */