1 files changed, 88 insertions, 0 deletions
diff --git a/sndobj/IFFT.h b/sndobj/IFFT.h
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+++ b/sndobj/IFFT.h
@@ -0,0 +1,88 @@
+ 
+////////////////////////////////////////////////////////////////////////
+// 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
+
+//////////////////////////////////////////////////////
+// IFFT.h: interface of the IFFT class: 
+//        short-time inverse fast fourier transform
+//        using the FFTW library (v. 2.1.3) 
+//        Victor Lazzarini, 2003 
+/////////////////////////////////////////////////////////
+
+#ifndef _IFFT_H
+#define _IFFT_H
+#include <rfftw/rfftw.h>
+#include "Table.h"
+#include "SndObj.h"
+
+class IFFT : public SndObj {
+
+ protected:
+
+  // m_vecsize is hopsize
+  // and fftsize is always a whole-number
+  // multiple of it.
+
+  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;
+
+  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
+
+  // reset memory and initialisation
+  void ReInit();
+
+ private:
+  // ifft wrapper method
+  void inline ifft(float* signal);
+
+
+
+ public:
+
+  IFFT();
+  IFFT(Table* window, SndObj* input, int fftsize = DEF_FFTSIZE, 
+       int hopsize=DEF_VECSIZE, float sr=DEF_SR);
+  ~IFFT();
+
+
+  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);
+  virtual void SetFFTSize(int fftsize);
+  virtual void SetHopSize(int hopsize);
+
+  short DoProcess();
+
+
+};
+
+#endif