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/* -*- c++ -*- */
/*
* Copyright 2012 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 "patterned_interleaver_impl.h"
#include <gr_io_signature.h>
namespace gr {
namespace blocks {
patterned_interleaver::sptr patterned_interleaver::make(size_t itemsize, std::vector<int> pattern)
{
return gnuradio::get_initial_sptr(new patterned_interleaver_impl(itemsize, pattern));
}
patterned_interleaver_impl::patterned_interleaver_impl(size_t itemsize, std::vector<int> pattern)
: gr_block ("patterned_interleaver",
gr_make_io_signature (pattern_max(pattern)+1, pattern_max(pattern)+1, itemsize),
gr_make_io_signature (1, 1, itemsize)),
d_pattern(pattern), d_counts( pattern_max(pattern)+1, 0), d_itemsize(itemsize)
{
BOOST_FOREACH( int i, d_pattern)
{ d_counts[i]++; }
set_output_multiple(d_pattern.size());
}
int
patterned_interleaver_impl::general_work(int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
size_t nblks = noutput_items/d_pattern.size();
std::vector<const char*> ii;
for(size_t i=0; i<input_items.size(); i++){
ii.push_back((const char*)input_items[i]);
}
char *oo = (char *) output_items[0];
for(size_t i=0; i<nblks; i++){
for(size_t j=0; j<d_pattern.size(); j++){
memcpy(oo, ii[d_pattern[j]], d_itemsize);
oo += d_itemsize;
ii[d_pattern[j]] += d_itemsize;
}
}
for(size_t i=0; i<d_counts.size(); i++){
consume(i, d_counts[i]*nblks );
}
return nblks*d_pattern.size();
}
void patterned_interleaver_impl::forecast (int noutput_items,
gr_vector_int &ninput_items_required){
int nblks = noutput_items / d_pattern.size();
for(size_t i=0; i<ninput_items_required.size(); i++){
ninput_items_required[i] = d_counts[i] * nblks;
}
}
} /* namespace blocks */
} /* namespace gr */
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