/usr/include/SndObj/IFFT.h is in libsndobj-dev 2.6.7+ds1-1.
This file is owned by root:root, with mode 0o644.
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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
//////////////////////////////////////////////////////
// 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
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