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/* -*- c++ -*- */
/*
* Copyright 2017 Moritz Luca Schmid, Communications Engineering Lab (CEL) / Karlsruhe Institute of Technology (KIT).
* The class firecode_checker is adapted from the Qt-DAB software, Copyright Jan van Katwijk (Lazy Chair Computing J.vanKatwijk@gmail.com)
*
* 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 "firecode_check_bb_impl.h"
#include <stdio.h>
#include <stdexcept>
#include <sstream>
#include <boost/format.hpp>
using namespace boost;
namespace gr {
namespace dab {
firecode_check_bb::sptr
firecode_check_bb::make(int bit_rate_n)
{
return gnuradio::get_initial_sptr
(new firecode_check_bb_impl(bit_rate_n));
}
/*
* The private constructor
*/
firecode_check_bb_impl::firecode_check_bb_impl(int bit_rate_n)
: gr::block("firecode_check_bb",
gr::io_signature::make(1, 1, sizeof(unsigned char)),
gr::io_signature::make(1, 1, sizeof(unsigned char)))
{
d_frame_size = 24 * bit_rate_n;
set_output_multiple(d_frame_size * 5); //logical frame
}
/*
* Our virtual destructor.
*/
firecode_check_bb_impl::~firecode_check_bb_impl()
{
}
void
firecode_check_bb_impl::forecast(int noutput_items, gr_vector_int &ninput_items_required)
{
ninput_items_required[0] = noutput_items;
}
int
firecode_check_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];
d_nproduced = 0;
d_nconsumed = 0;
while (d_nconsumed < noutput_items / d_frame_size - 4) {
if (fc.check(&in[d_nconsumed * d_frame_size])) {
GR_LOG_DEBUG(d_logger, format("fire code (%d %d) OK at frame %d") %(int)in[d_nconsumed*d_frame_size] %(int)in[d_nconsumed*d_frame_size+1] % (nitems_read(0) / d_frame_size));
// fire code OK, copy superframe to output
memcpy(out + d_nproduced * d_frame_size, in + d_nconsumed * d_frame_size, d_frame_size * 5);
d_nproduced += 5;
d_nconsumed += 5;
d_firecode_passed = true;
} else {
GR_LOG_DEBUG(d_logger, format("fire code failed at frame %d") % (nitems_read(0) / d_frame_size));
// shift of one logical frame
d_nconsumed++;
d_firecode_passed = false;
}
}
// Tell runtime system how many input items we consumed on
// each input stream.
consume_each(d_nconsumed * d_frame_size);
// Tell runtime system how many output items we produced.
return d_nproduced * d_frame_size;
}
} /* namespace dab */
} /* namespace gr */
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