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/* -*- c++ -*- */
/*
* Copyright 2004,2006,2010,2011 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <digital_ofdm_cyclic_prefixer.h>
#include <gr_io_signature.h>
digital_ofdm_cyclic_prefixer_sptr
digital_make_ofdm_cyclic_prefixer (size_t input_size, size_t output_size)
{
return gnuradio::get_initial_sptr(new digital_ofdm_cyclic_prefixer (input_size,
output_size));
}
digital_ofdm_cyclic_prefixer::digital_ofdm_cyclic_prefixer (size_t input_size,
size_t output_size)
: gr_sync_interpolator ("ofdm_cyclic_prefixer",
gr_make_io_signature (1, 1, input_size*sizeof(gr_complex)),
gr_make_io_signature (1, 1, sizeof(gr_complex)),
output_size),
d_input_size(input_size),
d_output_size(output_size)
{
}
int
digital_ofdm_cyclic_prefixer::work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
gr_complex *in = (gr_complex *) input_items[0];
gr_complex *out = (gr_complex *) output_items[0];
size_t cp_size = d_output_size - d_input_size;
unsigned int i=0, j=0;
j = cp_size;
for(i=0; i < d_input_size; i++,j++) {
out[j] = in[i];
}
j = d_input_size - cp_size;
for(i=0; i < cp_size; i++, j++) {
out[i] = in[j];
}
return d_output_size;
}
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