1 files changed, 93 insertions, 0 deletions
diff --git a/sndobj/FFT.h b/sndobj/FFT.h
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+ 
+////////////////////////////////////////////////////////////////////////
+// This file is part of the SndObj library
+//
+// 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+//
+// Copyright (c)Victor Lazzarini, 1997-2004
+// See License.txt for a disclaimer of all warranties
+// and licensing information
+
+//////////////////////////////////////////////////////
+// FFT.h: interface of the FFT class: 
+//        short-time fast fourier transform
+//        using the FFTW library (v. 2.1.3) 
+//        Victor Lazzarini, 2003 
+/////////////////////////////////////////////////////////
+
+#ifndef _FFT_H
+#define _FFT_H
+#include "SndObj.h"
+#include "Table.h"
+#include <rfftw/rfftw.h>
+
+class FFT : public SndObj {
+
+ protected:
+
+  // m_vecsize is FFT size
+  // m_hopsize should always be set to the time-domain
+  // vector size
+  int m_fftsize;
+  int m_hopsize;  // hopsize
+  int m_halfsize; // 1/2 fftsize
+  int *m_counter; // counter 
+  rfftw_plan m_plan; // FFTW initialisation
+  float m_fund;
+
+  float m_scale; // scaling factor
+  float m_norm;  // norm factor
+  int m_frames;  // frame overlaps
+  float** m_sigframe; // signal frames
+  float* m_ffttmp; // tmp vector for fft transform
+  int m_cur;    // index into current frame 
+
+  Table*  m_table; // window
+
+ private:
+  // fft wrapper method
+  void inline fft(float* signal);
+
+  // reset memory and initialisation
+  void ReInit();
+
+ public:
+
+  FFT();
+  FFT(Table* window, SndObj* input, float scale=1.f, 
+      int fftsize=DEF_FFTSIZE, int hopsize=DEF_VECSIZE,
+      float m_sr=DEF_SR);
+
+  ~FFT();
+  
+  int GetFFTSize() { return m_fftsize; }
+  int GetHopSize() { return m_hopsize; }
+  void SetWindow(Table* window){ m_table = window;}
+  int Connect(char* mess, void* input);
+  int Set(char* mess, float value);
+  void SetScale(float scale){ m_scale = scale; m_norm = m_fftsize/m_scale;}
+  virtual void SetFFTSize(int fftsize);
+  virtual void SetHopSize(int hopsize);
+
+  short DoProcess();
+  
+};
+
+#endif
+
+
+
+
+