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/* -*- c++ -*- */
/*
* Copyright 2004,2010,2013 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "lfsr_32k_source_s_impl.h"
#include <gnuradio/io_signature.h>
#include <stdexcept>
namespace gr {
namespace blocks {
lfsr_32k_source_s::sptr
lfsr_32k_source_s::make()
{
return gnuradio::get_initial_sptr
(new lfsr_32k_source_s_impl());
}
lfsr_32k_source_s_impl::lfsr_32k_source_s_impl()
: sync_block("lfsr_32k_source_s",
io_signature::make(0, 0, 0),
io_signature::make(1, 1, sizeof(short))),
d_index(0)
{
lfsr_32k lfsr;
for(int i = 0; i < BUFSIZE; i++)
d_buffer[i] = lfsr.next_short();
}
lfsr_32k_source_s_impl::~lfsr_32k_source_s_impl()
{
}
int
lfsr_32k_source_s_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
short *out = (short*)output_items[0];
short *buf = d_buffer;
int index = d_index;
for(int i = 0; i < noutput_items; i++) {
out[i] = buf[index];
// index = (index + 1) & (BUFSIZE - 1);
index = index + 1;
if(index >= BUFSIZE)
index = 0;
}
d_index = index;
return noutput_items;
}
} /* namespace blocks */
} /* namespace gr */
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