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/* -*- c++ -*- */
/*
* Copyright 2008,2010,2012 Free Software Foundation, Inc.
*
* 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 "probe_density_b_impl.h"
#include <gr_io_signature.h>
#include <iostream>
namespace gr {
namespace digital {
probe_density_b::sptr
probe_density_b::make(double alpha)
{
return gnuradio::get_initial_sptr
(new probe_density_b_impl(alpha));
}
probe_density_b_impl::probe_density_b_impl(double alpha)
: gr_sync_block("density_b",
gr_make_io_signature(1, 1, sizeof(char)),
gr_make_io_signature(0, 0, 0))
{
set_alpha(alpha);
d_density = 1.0;
}
probe_density_b_impl::~probe_density_b_impl()
{
}
void
probe_density_b_impl::set_alpha(double alpha)
{
d_alpha = alpha;
d_beta = 1.0-d_alpha;
}
int
probe_density_b_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const char *in = (const char *)input_items[0];
for(int i = 0; i < noutput_items; i++)
d_density = d_alpha*(double)in[i] + d_beta*d_density;
return noutput_items;
}
} /* namespace digital */
} /* namespace gr */
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