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/* -*- c++ -*- */
/*
* Copyright 2004 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
/*
* config.h is generated by configure. It contains the results
* of probing for features, options etc. It should be the first
* file included in your .cc file.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gnuradio/io_signature.h>
#include "qpsk_demapper_vcb_impl.h"
namespace gr {
namespace dab {
qpsk_demapper_vcb::sptr
qpsk_demapper_vcb::make(int symbol_length)
{
return gnuradio::get_initial_sptr
(new qpsk_demapper_vcb_impl(symbol_length));
}
qpsk_demapper_vcb_impl::qpsk_demapper_vcb_impl(int symbol_length)
: gr::sync_block("qpsk_demapper_vcb",
gr::io_signature::make (1, 1, sizeof(gr_complex)*symbol_length),
gr::io_signature::make (1, 1, sizeof(char)*symbol_length/4)),
d_symbol_length(symbol_length)
{
assert(symbol_length>0);
assert(symbol_length%4==0);
}
int
qpsk_demapper_vcb_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
gr_complex const *in = (const gr_complex *) input_items[0];
char *out = (char *) output_items[0];
char byte = 0;
for (int i=0; i<noutput_items; i++) {
for (int j=0; j<d_symbol_length/4; j++) {
byte = 0;
for (int k=0; k<4; k++) {
if (in[4*j+k].real()<0)
byte+=1;
byte = byte << 1;
if (in[4*j+k].imag()<0)
byte+=1;
if (k<3)
byte = byte << 1;
}
out[j] = byte;
}
in += d_symbol_length;
out += d_symbol_length/4;
}
return noutput_items;
}
}
}
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