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/* -*- c++ -*- */
/*
* Copyright 2008,2010,2012,2019 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "wavelet_ff_impl.h"
#include <gnuradio/io_signature.h>
#include <stdexcept>
#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::make_block_sptr<wavelet_ff_impl>(size, order, forward);
}
wavelet_ff_impl::wavelet_ff_impl(int size, int order, bool forward)
: sync_block("wavelet_ff",
io_signature::make(1, 1, size * sizeof(float)),
io_signature::make(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_temp == 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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