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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 "interleave_impl.h"
#include <gnuradio/io_signature.h>
namespace gr {
namespace blocks {
interleave::sptr interleave::make(size_t itemsize, unsigned int blocksize)
{
return gnuradio::get_initial_sptr(new interleave_impl(itemsize, blocksize));
}
interleave_impl::interleave_impl(size_t itemsize, unsigned int blocksize)
: block("interleave",
io_signature::make (1, io_signature::IO_INFINITE, itemsize),
io_signature::make (1, 1, itemsize)),
d_itemsize(itemsize), d_blocksize(blocksize)
{
set_fixed_rate(true);
set_output_multiple(d_blocksize);
}
bool
interleave_impl::check_topology(int ninputs, int noutputs)
{
set_relative_rate((double)ninputs);
d_ninputs = ninputs;
set_output_multiple(d_blocksize * d_ninputs);
return true;
}
int
interleave_impl::fixed_rate_ninput_to_noutput(int ninput)
{
return ninput * d_ninputs;
}
int
interleave_impl::fixed_rate_noutput_to_ninput(int noutput)
{
return (int) ((noutput / d_ninputs) + .5);
}
void
interleave_impl::forecast(int noutput_items,
gr_vector_int& ninput_items_required)
{
for(unsigned int i = 0; i < ninput_items_required.size(); ++i) {
ninput_items_required[i] = (int) ((noutput_items / ninput_items_required.size()) + .5);
}
}
int
interleave_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 noutput_blocks = (size_t) ((noutput_items/d_blocksize) + .5);
const char **in = (const char**)&input_items[0];
char *out = (char*)output_items[0];
for (unsigned int i = 0; i < noutput_blocks; i += d_ninputs) {
for (unsigned int n = 0; n < d_ninputs; n++){
memcpy(out, in[n], d_itemsize * d_blocksize);
out += d_itemsize * d_blocksize;
in[n] += d_itemsize * d_blocksize;
}
}
consume_each((int)((noutput_items/d_ninputs) + .5));
return noutput_items;
}
} /* namespace blocks */
} /* namespace gr */
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