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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 tewavelet 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 <wavelet_ff_impl.h>
#include <gr_io_signature.h>
#include <stdio.h>
// NB in this version, only Daubechies wavelets
// order is wavelet length, even, 2...20
namespace gr {
namespace wavelet {
wavelet_ff::sptr wavelet_ff::make(int size,
int order,
bool forward)
{
return gnuradio::get_initial_sptr(new wavelet_ff_impl(size, order, forward));
}
wavelet_ff_impl::wavelet_ff_impl(int size,
int order,
bool forward)
: gr_sync_block("wavelet_ff",
gr_make_io_signature(1, 1, size * sizeof(float)),
gr_make_io_signature(1, 1, size * sizeof(float))),
d_size(size),
d_order(order),
d_forward(forward)
{
d_wavelet = gsl_wavelet_alloc(gsl_wavelet_daubechies, d_order);
if (d_wavelet == NULL)
throw std::runtime_error("can't allocate wavelet");
d_workspace = gsl_wavelet_workspace_alloc(d_size);
if (d_workspace == NULL)
throw std::runtime_error("can't allocate wavelet workspace");
d_temp = (double *) malloc(d_size*sizeof(double));
if (d_workspace == NULL)
throw std::runtime_error("can't allocate wavelet double conversion temp");
}
wavelet_ff_impl::~wavelet_ff_impl()
{
gsl_wavelet_free(d_wavelet);
gsl_wavelet_workspace_free(d_workspace);
free((char *) d_temp);
}
int
wavelet_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 (int i = 0; i < d_size; i++)
d_temp[i] = in[i];
if (d_forward)
gsl_wavelet_transform_forward(d_wavelet,
d_temp,
1,
d_size,
d_workspace);
else
gsl_wavelet_transform_inverse(d_wavelet,
d_temp,
1,
d_size,
d_workspace);
for (int i = 0; i < d_size; i++)
out[i] = d_temp[i];
in += d_size;
out += d_size;
}
return noutput_items;
}
} /* namespace wavelet */
} /* namespace gr */
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