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/* -*- c++ -*- */
/*
* Copyright 2005,2010,2013 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.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include "unpack_k_bits_bb_impl.h"
#include <gr_io_signature.h>
#include <stdexcept>
#include <iostream>
namespace gr {
namespace blocks {
unpack_k_bits_bb::sptr
unpack_k_bits_bb::make(unsigned k)
{
return gnuradio::get_initial_sptr
(new unpack_k_bits_bb_impl(k));
}
unpack_k_bits_bb_impl::unpack_k_bits_bb_impl(unsigned k)
: gr_sync_interpolator("unpack_k_bits_bb",
gr_make_io_signature(1, 1, sizeof(unsigned char)),
gr_make_io_signature(1, 1, sizeof(unsigned char)),
k),
d_k(k)
{
if(d_k == 0)
throw std::out_of_range("interpolation must be > 0");
}
unpack_k_bits_bb_impl::~unpack_k_bits_bb_impl()
{
}
int
unpack_k_bits_bb_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const unsigned char *in = (const unsigned char *)input_items[0];
unsigned char *out = (unsigned char *)output_items[0];
int n = 0;
for(unsigned int i = 0; i < noutput_items/d_k; i++) {
unsigned int t = in[i];
for(int j = d_k - 1; j >= 0; j--)
out[n++] = (t >> j) & 0x01;
}
assert(n == noutput_items);
return noutput_items;
}
} /* namespace blocks */
} /* namespace gr */
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