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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_mapper_vbc_impl.h"
namespace gr {
namespace dab {
qpsk_mapper_vbc::sptr
qpsk_mapper_vbc::make(int symbol_length)
{
return gnuradio::get_initial_sptr
(new qpsk_mapper_vbc_impl(symbol_length));
}
qpsk_mapper_vbc_impl::qpsk_mapper_vbc_impl(int symbol_length)
: gr::sync_block("qpsk_mapper_vbc",
gr::io_signature::make (1, 1, sizeof(char)*symbol_length/4),
gr::io_signature::make (1, 1, sizeof(gr_complex)*symbol_length)),
d_symbol_length(symbol_length)
{
assert(symbol_length>0);
assert(symbol_length%4==0);
}
int
qpsk_mapper_vbc_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
char const *in = (const char *) input_items[0];
gr_complex *out = (gr_complex *) output_items[0];
gr_complex symbol;
char byte;
for (int i=0; i<noutput_items; i++) {
for (int j=0; j<d_symbol_length/4; j++) {
byte = in[j];
out[0] = gr_complex((byte&128)>0?-I_SQRT2:I_SQRT2,(byte&64)>0?-I_SQRT2:I_SQRT2);
out[1] = gr_complex((byte&32)>0?-I_SQRT2:I_SQRT2, (byte&16)>0?-I_SQRT2:I_SQRT2);
out[2] = gr_complex((byte&8)>0?-I_SQRT2:I_SQRT2, (byte&4)>0?-I_SQRT2:I_SQRT2);
out[3] = gr_complex((byte&2)>0?-I_SQRT2:I_SQRT2, (byte&1)>0?-I_SQRT2:I_SQRT2);
out+=4;
}
in += d_symbol_length/4;
}
return noutput_items;
}
}
}
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