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/* -*- c++ -*- */
/*
* Copyright 2004,2010,2013 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 "threshold_ff_impl.h"
#include <gr_io_signature.h>
namespace gr {
namespace blocks {
threshold_ff::sptr
threshold_ff::make(float lo, float hi, float initial_state)
{
return gnuradio::get_initial_sptr
(new threshold_ff_impl(lo, hi, initial_state));
}
threshold_ff_impl::threshold_ff_impl(float lo, float hi,
float initial_state)
: gr_sync_block("threshold_ff",
gr_make_io_signature(1, 1, sizeof(float)),
gr_make_io_signature(1, 1, sizeof(float))),
d_lo(lo), d_hi(hi), d_last_state(initial_state)
{
}
threshold_ff_impl::~threshold_ff_impl()
{
}
int
threshold_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 i = 0; i < noutput_items; i++) {
if(in[i] > d_hi) {
out[i] = 1.0;
d_last_state = 1.0;
}
else if(in[i] < d_lo) {
out[i] = 0.0;
d_last_state = 0.0;
}
else
out[i] = d_last_state;
}
return noutput_items;
}
} /* namespace blocks */
} /* namespace gr */
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