109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
/* -*- c++ -*- */
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/*
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* Copyright 2013 <+YOU OR YOUR COMPANY+>.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gr_io_signature.h>
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#include "nrz_to_nrzi_impl.h"
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#include <stdio.h>
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namespace gr {
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namespace AISTX {
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nrz_to_nrzi::sptr
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nrz_to_nrzi::make()
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{
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return gnuradio::get_initial_sptr
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(new nrz_to_nrzi_impl());
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}
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/*
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* The private constructor
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*/
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nrz_to_nrzi_impl::nrz_to_nrzi_impl()
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: gr_block("nrz_to_nrzi",
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gr_make_io_signature(1, 1, sizeof(unsigned char)),
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gr_make_io_signature(1, 1, sizeof(unsigned char)))
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{}
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/*
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* Our virtual destructor.
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*/
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nrz_to_nrzi_impl::~nrz_to_nrzi_impl()
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{
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}
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void
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nrz_to_nrzi_impl::forecast (int noutput_items, gr_vector_int &ninput_items_required)
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{
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/* <+forecast+> e.g. ninput_items_required[0] = noutput_items */
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}
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int
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nrz_to_nrzi_impl::general_work (int noutput_items,
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gr_vector_int &ninput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items)
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{
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const unsigned char *in = (const unsigned char *) input_items[0];
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unsigned char *out = (unsigned char *) output_items[0];
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unsigned char nrzi_bit;
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unsigned char nrz_bit;
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unsigned char d_prev_nrzi_bit = 0;
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for(int i = 0;i<noutput_items;++i)
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printf("%d", in[i]);
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printf("\n");
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for (int i = 0; i < noutput_items; i++)
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{
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nrz_bit = in[i];
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if(nrz_bit == 0)
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{
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nrzi_bit = d_prev_nrzi_bit ^ 1;
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}
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else
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{
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nrzi_bit = d_prev_nrzi_bit;
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}
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out[i] = nrzi_bit;
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d_prev_nrzi_bit = nrzi_bit;
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}
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for(int i = 0;i<noutput_items;++i)
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printf("%d", out[i]);
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printf("\n");
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// Tell runtime system how many input items we consumed on
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// each input stream.
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consume_each (noutput_items);
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// Tell runtime system how many output items we produced.
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return noutput_items;
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}
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} /* namespace AISTX */
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} /* namespace gr */
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