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/* -*- c++ -*- */
/*
* Copyright 2003 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef _GRI_FFT_H_
#define _GRI_FFT_H_
/*
* Wrappers for FFTW single precision 1d dft
*/
#include <gr_complex.h>
/*!
* \brief FFT: complex in, complex out
*/
class gri_fft_complex {
int d_fft_size;
gr_complex *d_inbuf;
gr_complex *d_outbuf;
void *d_plan;
public:
gri_fft_complex (int fft_size, bool forward = true);
virtual ~gri_fft_complex ();
/*
* These return pointers to buffers owned by gri_fft_complex into which
* input and output take place. It's done this way in order to
* ensure optimal alignment for SIMD instructions.
*/
gr_complex *get_inbuf () const { return d_inbuf; }
gr_complex *get_outbuf () const { return d_outbuf; }
int inbuf_length () const { return d_fft_size; }
int outbuf_length () const { return d_fft_size; }
/*!
* compute FFT. The input comes from inbuf, the output is placed in outbuf.
*/
void execute ();
};
/*!
* \brief FFT: real in, complex out
*/
class gri_fft_real_fwd {
int d_fft_size;
float *d_inbuf;
gr_complex *d_outbuf;
void *d_plan;
public:
gri_fft_real_fwd (int fft_size);
virtual ~gri_fft_real_fwd ();
/*
* These return pointers to buffers owned by gri_fft_real_fwd into
* which input and output take place. It's done this way in order
* to ensure optimal alignment for SIMD instructions.
*/
float *get_inbuf () const { return d_inbuf; }
gr_complex *get_outbuf () const { return d_outbuf; }
int inbuf_length () const { return d_fft_size; }
int outbuf_length () const { return d_fft_size / 2 + 1; }
/*!
* compute FFT. The input comes from inbuf, the output is placed in outbuf.
*/
void execute ();
};
/*!
* \brief FFT: complex in, float out
*/
class gri_fft_real_rev {
int d_fft_size;
gr_complex *d_inbuf;
float *d_outbuf;
void *d_plan;
public:
gri_fft_real_rev (int fft_size);
virtual ~gri_fft_real_rev ();
/*
* These return pointers to buffers owned by gri_fft_real_rev into
* which input and output take place. It's done this way in order
* to ensure optimal alignment for SIMD instructions.
*/
gr_complex *get_inbuf () const { return d_inbuf; }
float *get_outbuf () const { return d_outbuf; }
int inbuf_length () const { return d_fft_size / 2 + 1; }
int outbuf_length () const { return d_fft_size; }
/*!
* compute FFT. The input comes from inbuf, the output is placed in outbuf.
*/
void execute ();
};
#endif
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