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/* -*- c++ -*- */
/*
* Copyright 2008,2010,2012 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdexcept>
#include <squash_ff_impl.h>
#include <gr_io_signature.h>
// expect input vector of igrid.size y-values,
// produce output vector of ogrid.size y-values
namespace gr {
namespace wavelet {
squash_ff::sptr squash_ff::make(const std::vector<float> &igrid,
const std::vector<float> &ogrid)
{
return gnuradio::get_initial_sptr(new squash_ff_impl(igrid, ogrid));
}
squash_ff_impl::squash_ff_impl(const std::vector<float> &igrid,
const std::vector<float> &ogrid)
: gr_sync_block("squash_ff",
gr_make_io_signature(1, 1, sizeof(float) * igrid.size()),
gr_make_io_signature(1, 1, sizeof(float) * ogrid.size()))
{
d_inum = igrid.size();
d_onum = ogrid.size();
d_igrid = (double *) malloc(d_inum * sizeof(double));
d_iwork = (double *) malloc(d_inum * sizeof(double));
d_ogrid = (double *) malloc(d_onum * sizeof(double));
for (unsigned int i = 0; i < d_inum; i++)
d_igrid[i] = igrid[i];
for (unsigned int i = 0; i < d_onum; i++)
d_ogrid[i] = ogrid[i];
d_accel = gsl_interp_accel_alloc();
d_spline = gsl_spline_alloc(gsl_interp_cspline, d_inum); // FIXME check w/ Frank
}
squash_ff_impl::~squash_ff_impl()
{
free((char *) d_igrid);
free((char *) d_iwork);
free((char *) d_ogrid);
gsl_interp_accel_free(d_accel);
gsl_spline_free(d_spline);
}
int
squash_ff_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const float *in = (const float *) input_items[0];
float *out = (float *) output_items[0];
for (int count = 0; count < noutput_items; count++) {
for (unsigned int i = 0; i < d_inum; i++)
d_iwork[i] = in[i];
gsl_spline_init(d_spline, d_igrid, d_iwork, d_inum);
for (unsigned int i = 0; i < d_onum; i++)
out[i] = gsl_spline_eval(d_spline, d_ogrid[i], d_accel);
in += d_inum;
out += d_onum;
}
return noutput_items;
}
} /* namespace wavelet */
} /* namespace gr */
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