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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 2, 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <trellis_permutation.h>
#include <gr_io_signature.h>
#include <iostream>
trellis_permutation_sptr
trellis_make_permutation (const int K, const std::vector<int> &TABLE, const size_t NBYTES)
{
return trellis_permutation_sptr (new trellis_permutation (K,TABLE,NBYTES));
}
trellis_permutation::trellis_permutation (const int K, const std::vector<int> &TABLE, const size_t NBYTES)
: gr_sync_block ("permutation",
gr_make_io_signature (1, -1, NBYTES),
gr_make_io_signature (1, -1, NBYTES)),
d_K (K),
d_TABLE (TABLE),
d_NBYTES (NBYTES)
{
set_output_multiple (d_K);
//std::cout << d_K << "\n";
}
int
trellis_permutation::work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
int nstreams = input_items.size();
assert (input_items.size() == output_items.size());
assert (noutput_items % d_K ==0);
//std::cout << noutput_items << "\n";
for (int m=0;m<nstreams;m++) {
const char *in = (const char *) input_items[m];
char *out = (char *) output_items[m];
// per stream processing
for (unsigned int i = 0; i < noutput_items; i++){
//std::cout << i << " " << i*d_NBYTES << " " << (d_K*(i/d_K)+d_TABLE[i%d_K])*d_NBYTES << "\n";
memcpy(&(out[i*d_NBYTES]), &(in[(d_K*(i/d_K)+d_TABLE[i%d_K])*d_NBYTES]), d_NBYTES);
}
// end per stream processing
}
return noutput_items;
}
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