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/* -*- c++ -*- */
/*
* Copyright 2013 <+YOU OR YOUR COMPANY+>.
*
* 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 <gr_io_signature.h>
#include "nrz_to_nrzi_impl.h"
#include <stdio.h>
namespace gr {
namespace AISTX {
nrz_to_nrzi::sptr
nrz_to_nrzi::make()
{
return gnuradio::get_initial_sptr
(new nrz_to_nrzi_impl());
}
/*
* The private constructor
*/
nrz_to_nrzi_impl::nrz_to_nrzi_impl()
: gr_block("nrz_to_nrzi",
gr_make_io_signature(1, 1, sizeof(unsigned char)),
gr_make_io_signature(1, 1, sizeof(unsigned char)))
{}
/*
* Our virtual destructor.
*/
nrz_to_nrzi_impl::~nrz_to_nrzi_impl()
{
}
void
nrz_to_nrzi_impl::forecast (int noutput_items, gr_vector_int &ninput_items_required)
{
/* <+forecast+> e.g. ninput_items_required[0] = noutput_items */
}
int
nrz_to_nrzi_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];
unsigned char nrzi_bit;
unsigned char nrz_bit;
unsigned char d_prev_nrzi_bit = 0;
for(int i = 0;i<noutput_items;++i)
printf("%d", in[i]);
printf("\n");
for (int i = 0; i < noutput_items; i++)
{
nrz_bit = in[i];
if(nrz_bit == 0)
{
nrzi_bit = d_prev_nrzi_bit ^ 1;
}
else
{
nrzi_bit = d_prev_nrzi_bit;
}
out[i] = nrzi_bit;
d_prev_nrzi_bit = nrzi_bit;
}
for(int i = 0;i<noutput_items;++i)
printf("%d", out[i]);
printf("\n");
// Tell runtime system how many input items we consumed on
// each input stream.
consume_each (noutput_items);
// Tell runtime system how many output items we produced.
return noutput_items;
}
} /* namespace AISTX */
} /* namespace gr */
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