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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 "deinterleave_impl.h"
#include <gnuradio/io_signature.h>
namespace gr {
namespace blocks {
deinterleave::sptr deinterleave::make(size_t itemsize, unsigned int blocksize)
{
return gnuradio::get_initial_sptr(new deinterleave_impl(itemsize, blocksize));
}
deinterleave_impl::deinterleave_impl(size_t itemsize, unsigned int blocksize)
: block("deinterleave",
io_signature::make (1, 1, itemsize),
io_signature::make (1, io_signature::IO_INFINITE, itemsize)),
d_itemsize(itemsize), d_blocksize(blocksize), d_current_output(0)
{
d_size_bytes = d_itemsize * d_blocksize;
set_output_multiple(blocksize);
}
void
deinterleave_impl::forecast(int noutput_items, gr_vector_int &ninput_items_required)
{
ninput_items_required[0] = noutput_items * d_noutputs;
}
bool
deinterleave_impl::check_topology(int ninputs, int noutputs)
{
set_relative_rate(1.0/(double)noutputs);
d_noutputs = noutputs;
return true;
}
int
deinterleave_impl::general_work(int noutput_items,
gr_vector_int& ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const char *in = (const char*)input_items[0];
char **out = (char**)&output_items[0];
int count = 0, totalcount = noutput_items*d_noutputs;
unsigned int skip = 0;
unsigned int acc = 0;
while(count < totalcount) {
memcpy(out[d_current_output]+skip*d_size_bytes, in, d_size_bytes);
in += d_size_bytes;
produce(d_current_output, d_blocksize);
d_current_output = (d_current_output + 1) % d_noutputs;
// accumulate times through the loop; increment skip after a
// full pass over the output streams.
// This is separate than d_current_output since we could be in
// the middle of a loop when we exit.
acc++;
if(acc >= d_noutputs) {
skip++;
acc = 0;
}
// Keep track of our loop counter
count+=d_blocksize;
}
consume_each(totalcount);
return WORK_CALLED_PRODUCE;
}
} /* namespace blocks */
} /* namespace gr */
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