src/visualizer.h

   1 /***************************************************************************
   2  *   Copyright (C) 2008-2009 by Andrzej Rybczak                            *
   3  *   electricityispower@gmail.com                                          *
   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                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.              *
  19  ***************************************************************************/
  20
  21 #ifndef _VISUALIZER_H
  22 #define _VISUALIZER_H
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #ifdef ENABLE_VISUALIZER
  29
  30 #include "window.h"
  31 #include "screen.h"
  32
  33 #ifdef HAVE_FFTW3_H
  34 # include <fftw3.h>
  35 #endif
  36
  37 class Visualizer : public Screen<Window>
  38 {
  39         public:
  40                 virtual void SwitchTo();
  41                 virtual void Resize();
  42
  43                 virtual std::basic_string<my_char_t> Title();
  44
  45                 virtual void Update();
  46                 virtual void Scroll(Where, const int *) { }
  47
  48                 virtual void EnterPressed() { }
  49                 virtual void SpacePressed();
  50                 virtual void MouseButtonPressed(MEVENT) { }
  51
  52                 virtual NCurses::List *GetList() { return 0; }
  53
  54                 virtual bool allowsSelection() { return false; }
  55
  56                 void SetFD();
  57                 void ResetFD();
  58
  59         protected:
  60                 virtual void Init();
  61
  62         private:
  63                 void DrawSoundWave(int16_t *, ssize_t);
  64 #               ifdef HAVE_FFTW3_H
  65                 void DrawFrequencySpectrum(int16_t *, ssize_t);
  66 #               endif // HAVE_FFTW3_H
  67
  68                 int itsFifo;
  69 #               ifdef HAVE_FFTW3_H
  70                 unsigned *itsFreqsMagnitude;
  71                 double *itsInput;
  72                 fftw_complex *itsOutput;
  73                 fftw_plan itsPlan;
  74 #               endif // HAVE_FFTW3_H
  75
  76                 static const unsigned Samples;
  77 #               ifdef HAVE_FFTW3_H
  78                 static const unsigned FFTResults;
  79 #               endif // HAVE_FFTW3_H
  80
  81 };
  82
  83 extern Visualizer *myVisualizer;
  84
  85 #endif // ENABLE_VISUALIZER
  86
  87 #endif
  88