/usr/include/gnuradio/fft/fft.h is in gnuradio-dev 3.7.10.1-2+b3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 | /* -*- c++ -*- */
/*
* Copyright 2003,2008,2012 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 3, 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 _FFT_FFT_H_
#define _FFT_FFT_H_
/*
* Wrappers for FFTW single precision 1d dft
*/
#include <gnuradio/fft/api.h>
#include <gnuradio/gr_complex.h>
#include <boost/thread.hpp>
namespace gr {
namespace fft {
/*! \brief Helper function for allocating complex* buffers
*/
FFT_API gr_complex* malloc_complex(int size);
/*! \brief Helper function for allocating float* buffers
*/
FFT_API float* malloc_float(int size);
/*! \brief Helper function for allocating double* buffers
*/
FFT_API double* malloc_double(int size);
/*! \brief Helper function for freeing fft buffers
*/
FFT_API void free(void *b);
/*!
* \brief Export reference to planner mutex for those apps that
* want to use FFTW w/o using the fft_impl_fftw* classes.
*/
class FFT_API planner {
public:
typedef boost::mutex::scoped_lock scoped_lock;
/*!
* Return reference to planner mutex
*/
static boost::mutex &mutex();
};
/*!
* \brief FFT: complex in, complex out
* \ingroup misc
*/
class FFT_API fft_complex {
int d_fft_size;
int d_nthreads;
gr_complex *d_inbuf;
gr_complex *d_outbuf;
void *d_plan;
public:
fft_complex(int fft_size, bool forward = true, int nthreads=1);
virtual ~fft_complex();
/*
* These return pointers to buffers owned by fft_impl_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; }
/*!
* Set the number of threads to use for caclulation.
*/
void set_nthreads(int n);
/*!
* Get the number of threads being used by FFTW
*/
int nthreads() const { return d_nthreads; }
/*!
* compute FFT. The input comes from inbuf, the output is placed in
* outbuf.
*/
void execute();
};
/*!
* \brief FFT: real in, complex out
* \ingroup misc
*/
class FFT_API fft_real_fwd {
int d_fft_size;
int d_nthreads;
float *d_inbuf;
gr_complex *d_outbuf;
void *d_plan;
public:
fft_real_fwd (int fft_size, int nthreads=1);
virtual ~fft_real_fwd ();
/*
* These return pointers to buffers owned by fft_impl_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; }
/*!
* Set the number of threads to use for caclulation.
*/
void set_nthreads(int n);
/*!
* Get the number of threads being used by FFTW
*/
int nthreads() const { return d_nthreads; }
/*!
* compute FFT. The input comes from inbuf, the output is placed in
* outbuf.
*/
void execute();
};
/*!
* \brief FFT: complex in, float out
* \ingroup misc
*/
class FFT_API fft_real_rev {
int d_fft_size;
int d_nthreads;
gr_complex *d_inbuf;
float *d_outbuf;
void *d_plan;
public:
fft_real_rev(int fft_size, int nthreads=1);
virtual ~fft_real_rev();
/*
* These return pointers to buffers owned by fft_impl_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; }
/*!
* Set the number of threads to use for caclulation.
*/
void set_nthreads(int n);
/*!
* Get the number of threads being used by FFTW
*/
int nthreads() const { return d_nthreads; }
/*!
* compute FFT. The input comes from inbuf, the output is placed in
* outbuf.
*/
void execute();
};
} /* namespace fft */
} /*namespace gr */
#endif /* _FFT_FFT_H_ */
|