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/* -*- c++ -*- */
/*
* Copyright 2017 Moritz Luca Schmid, Communications Engineering Lab (CEL) / Karlsruhe Institute of Technology (KIT).
*
* This 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.
*
* This software 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 this software; 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 <gnuradio/io_signature.h>
#include "valve_ff_impl.h"
namespace gr {
namespace dab {
valve_ff::sptr
valve_ff::make(bool closed, bool feed_with_zeros)
{
return gnuradio::get_initial_sptr
(new valve_ff_impl(closed, feed_with_zeros));
}
/*
* The private constructor
*/
valve_ff_impl::valve_ff_impl(bool closed, bool feed_with_zeros)
: gr::block("valve_ff",
gr::io_signature::make(1, 1, sizeof(float)),
gr::io_signature::make(1, 1, sizeof(float))),
d_feed_with_zeros(feed_with_zeros), d_closed(closed)
{}
/*
* Our virtual destructor.
*/
valve_ff_impl::~valve_ff_impl()
{
}
void
valve_ff_impl::forecast (int noutput_items, gr_vector_int &ninput_items_required)
{
ninput_items_required[0] = noutput_items;
}
int
valve_ff_impl::general_work (int noutput_items,
gr_vector_int &ninput_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];
if (d_closed){
if (d_feed_with_zeros){
// send zeros instead of the incoming floats as idle state
memset(out, 0, noutput_items * sizeof(float));
consume_each (noutput_items);
return noutput_items;
}
else{
// dump incoming frames and send nothing
consume_each (noutput_items);
return 0;
}
}
else{
// valve opened, simply pass through the floats
memcpy(out, in, noutput_items * sizeof(float));
consume_each (noutput_items);
return noutput_items;
}
}
} /* namespace dab */
} /* namespace gr */
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