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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 "puncture_bb_impl.h"
namespace gr {
namespace dab {
puncture_bb::sptr
puncture_bb::make(const std::vector<unsigned char> &puncturing_vector)
{
return gnuradio::get_initial_sptr
(new puncture_bb_impl(puncturing_vector));
}
unsigned int puncture_bb_impl::ones(const std::vector<unsigned char> &puncturing_vector)
{
unsigned int onescount = 0;
for (unsigned int i = 0; i < puncturing_vector.size(); i++) {
if (puncturing_vector[i] == 1)
onescount++;
}
return onescount;
}
/*
* The private constructor
*/
puncture_bb_impl::puncture_bb_impl(const std::vector<unsigned char> &puncturing_vector)
: gr::block("puncture_bb",
gr::io_signature::make(1, 1, sizeof(unsigned char)),
gr::io_signature::make(1, 1, sizeof(unsigned char))),
d_puncturing_vector(puncturing_vector)
{
d_vlen_in = puncturing_vector.size();
d_vlen_out = ones(puncturing_vector);
set_output_multiple(d_vlen_out);
set_relative_rate(((float)d_vlen_out) / d_vlen_in);
}
/*
* Our virtual destructor.
*/
puncture_bb_impl::~puncture_bb_impl()
{
}
void
puncture_bb_impl::forecast(int noutput_items, gr_vector_int &ninput_items_required)
{
ninput_items_required[0] = noutput_items * d_vlen_in / d_vlen_out;
}
int
puncture_bb_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 unsigned char *in = (const unsigned char *) input_items[0];
unsigned char *out = (unsigned char *) output_items[0];
for (int i = 0; i < noutput_items * d_vlen_in / d_vlen_out; i++) {
if (d_puncturing_vector[i % d_vlen_in] == 1)
*out++ = *in++;
else
in++;
}
// Tell runtime system how many input items we consumed on
// each input stream.
consume_each(noutput_items * d_vlen_in / d_vlen_out);
// Tell runtime system how many output items we produced.
return noutput_items;
}
} /* namespace dab */
} /* namespace gr */
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