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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 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.
*/
#include <gri_fft.h>
#include <fftw3.h>
#include <gr_complex.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <cassert>
#include <stdexcept>
static char *
wisdom_filename ()
{
static char *filename = ".gr_fftw_wisdom";
char *home = getenv ("HOME");
if (home){
char *p = new char[strlen (home) + strlen (filename) + 2];
strcpy (p, home);
strcat (p, "/");
strcat (p, filename);
return p;
}
return 0;
}
static void
gri_fftw_import_wisdom ()
{
char *filename = wisdom_filename ();
FILE *fp = fopen (filename, "r");
if (fp != 0){
int r = fftwf_import_wisdom_from_file (fp);
fclose (fp);
if (!r){
fprintf (stderr, "gri_fftw: can't import wisdom from %s\n", filename);
}
}
delete [] filename;
}
static void
gri_fftw_export_wisdom ()
{
char *filename = wisdom_filename ();
FILE *fp = fopen (filename, "w");
if (fp != 0){
fftwf_export_wisdom_to_file (fp);
fclose (fp);
}
else {
fprintf (stderr, "gri_fftw: ");
perror (filename);
}
delete [] filename;
}
// ----------------------------------------------------------------
gri_fft_complex::gri_fft_complex (int fft_size, bool forward)
{
assert (sizeof (fftwf_complex) == sizeof (gr_complex));
if (fft_size <= 0)
throw std::out_of_range ("gri_fftw: invalid fft_size");
d_fft_size = fft_size;
d_inbuf = (gr_complex *) fftwf_malloc (sizeof (gr_complex) * inbuf_length ());
if (d_inbuf == 0)
throw std::runtime_error ("fftwf_malloc");
d_outbuf = (gr_complex *) fftwf_malloc (sizeof (gr_complex) * outbuf_length ());
if (d_outbuf == 0){
fftwf_free (d_inbuf);
throw std::runtime_error ("fftwf_malloc");
}
// FIXME If there's ever a chance that the planning functions
// will be called in multiple threads, we've got to ensure single
// threaded access. They are not thread-safe.
gri_fftw_import_wisdom (); // load prior wisdom from disk
d_plan = fftwf_plan_dft_1d (fft_size,
reinterpret_cast<fftwf_complex *>(d_inbuf),
reinterpret_cast<fftwf_complex *>(d_outbuf),
forward ? FFTW_FORWARD : FFTW_BACKWARD,
FFTW_MEASURE);
if (d_plan == NULL) {
fprintf(stderr, "gri_fft_complex: error creating plan\n");
throw std::runtime_error ("fftwf_plan_dft_1d failed");
}
gri_fftw_export_wisdom (); // store new wisdom to disk
}
gri_fft_complex::~gri_fft_complex ()
{
fftwf_destroy_plan ((fftwf_plan) d_plan);
fftwf_free (d_inbuf);
fftwf_free (d_outbuf);
}
void
gri_fft_complex::execute ()
{
fftwf_execute ((fftwf_plan) d_plan);
}
// ----------------------------------------------------------------
gri_fft_real_fwd::gri_fft_real_fwd (int fft_size)
{
assert (sizeof (fftwf_complex) == sizeof (gr_complex));
if (fft_size <= 0)
throw std::out_of_range ("gri_fftw: invalid fft_size");
d_fft_size = fft_size;
d_inbuf = (float *) fftwf_malloc (sizeof (float) * inbuf_length ());
if (d_inbuf == 0)
throw std::runtime_error ("fftwf_malloc");
d_outbuf = (gr_complex *) fftwf_malloc (sizeof (gr_complex) * outbuf_length ());
if (d_outbuf == 0){
fftwf_free (d_inbuf);
throw std::runtime_error ("fftwf_malloc");
}
// FIXME If there's ever a chance that the planning functions
// will be called in multiple threads, we've got to ensure single
// threaded access. They are not thread-safe.
gri_fftw_import_wisdom (); // load prior wisdom from disk
d_plan = fftwf_plan_dft_r2c_1d (fft_size,
d_inbuf,
reinterpret_cast<fftwf_complex *>(d_outbuf),
FFTW_MEASURE);
if (d_plan == NULL) {
fprintf(stderr, "gri_fft_real_fwd: error creating plan\n");
throw std::runtime_error ("fftwf_plan_dft_r2c_1d failed");
}
gri_fftw_export_wisdom (); // store new wisdom to disk
}
gri_fft_real_fwd::~gri_fft_real_fwd ()
{
fftwf_destroy_plan ((fftwf_plan) d_plan);
fftwf_free (d_inbuf);
fftwf_free (d_outbuf);
}
void
gri_fft_real_fwd::execute ()
{
fftwf_execute ((fftwf_plan) d_plan);
}
// ----------------------------------------------------------------
gri_fft_real_rev::gri_fft_real_rev (int fft_size)
{
assert (sizeof (fftwf_complex) == sizeof (gr_complex));
if (fft_size <= 0)
throw std::out_of_range ("gri_fftw: invalid fft_size");
d_fft_size = fft_size;
d_inbuf = (gr_complex *) fftwf_malloc (sizeof (gr_complex) * inbuf_length ());
if (d_inbuf == 0)
throw std::runtime_error ("fftwf_malloc");
d_outbuf = (float *) fftwf_malloc (sizeof (float) * outbuf_length ());
if (d_outbuf == 0){
fftwf_free (d_inbuf);
throw std::runtime_error ("fftwf_malloc");
}
// FIXME If there's ever a chance that the planning functions
// will be called in multiple threads, we've got to ensure single
// threaded access. They are not thread-safe.
gri_fftw_import_wisdom (); // load prior wisdom from disk
d_plan = fftwf_plan_dft_c2r_1d (fft_size,
reinterpret_cast<fftwf_complex *>(d_inbuf),
d_outbuf,
FFTW_MEASURE);
if (d_plan == NULL) {
fprintf(stderr, "gri_fft_real_rev: error creating plan\n");
throw std::runtime_error ("fftwf_plan_dft_c2r_1d failed");
}
gri_fftw_export_wisdom (); // store new wisdom to disk
}
gri_fft_real_rev::~gri_fft_real_rev ()
{
fftwf_destroy_plan ((fftwf_plan) d_plan);
fftwf_free (d_inbuf);
fftwf_free (d_outbuf);
}
void
gri_fft_real_rev::execute ()
{
fftwf_execute ((fftwf_plan) d_plan);
}
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