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/* -*- c++ -*- */
/*
* Copyright 2013-2014 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 "ber_bf_impl.h"
#include "ber_tools.h"
#include <gnuradio/io_signature.h>
#include <volk/volk.h>
#include <math.h>
namespace gr {
namespace fec {
ber_bf::sptr
ber_bf::make(bool test_mode, int berminerrors, float ber_limit)
{
return gnuradio::get_initial_sptr
(new ber_bf_impl(test_mode, berminerrors, ber_limit));
}
ber_bf_impl::ber_bf_impl(bool test_mode, int berminerrors, float ber_limit)
: block("fec_ber_bf",
io_signature::make(2, 2, sizeof(unsigned char)),
io_signature::make(1, 1, sizeof(float))),
d_total_errors(0), d_total(0), d_test_mode(test_mode),
d_berminerrors(berminerrors), d_ber_limit(ber_limit)
{
}
ber_bf_impl::~ber_bf_impl()
{
}
void
ber_bf_impl::forecast(int noutput_items,
gr_vector_int& ninput_items_required)
{
ninput_items_required[0] = 1<<10 * noutput_items;
ninput_items_required[1] = 1<<10 * noutput_items;
}
int
ber_bf_impl::general_work(int noutput_items,
gr_vector_int& ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
if(d_test_mode) {
if(d_total_errors >= d_berminerrors) {
return -1;
}
else {
unsigned char *inbuffer0 = (unsigned char *)input_items[0];
unsigned char *inbuffer1 = (unsigned char *)input_items[1];
float *outbuffer = (float *)output_items[0];
int items = ninput_items[0] <= ninput_items[1] ? ninput_items[0] : ninput_items[1];
if(items > 0) {
/*
for(int i = 0; i < items; ++i) {
if(inbuffer0[i] != inbuffer1[i]) {
GR_LOG_INFO(d_logger, boost::format("%1%/%2%: %3% versus %4%") \
% i % items % inbuffer0[i] % inbuffer1[i]);
}
}
GR_LOG_INFO(d_logger, boost::format("%1% errors") \
% (compber(inbuffer0, inbuffer1, items)));
*/
d_total_errors += compber(inbuffer0, inbuffer1, items);
d_total += items;
}
consume_each(items);
if(d_total_errors >= d_berminerrors) {
outbuffer[0] = log10(((double)d_total_errors)/(d_total * 8.0));
GR_LOG_INFO(d_logger, boost::format(" %1% over %2% --> %3%") \
% d_total_errors % (d_total * 8) % outbuffer[0]);
return 1;
}
else if(log10(((double)d_berminerrors)/(d_total * 8.0)) < d_ber_limit) {
GR_LOG_INFO(d_logger, " Min. BER limit reached");
outbuffer[0] = d_ber_limit;
d_total_errors = d_berminerrors + 1;
return 1;
}
else {
return 0;
}
}
}
else { // streaming mode
unsigned char *inbuffer0 = (unsigned char *)input_items[0];
unsigned char *inbuffer1 = (unsigned char *)input_items[1];
float *outbuffer = (float *)output_items[0];
int items = ninput_items[0] <= ninput_items[1] ? ninput_items[0] : ninput_items[1];
if(items > 0) {
uint32_t ret;
for(int i = 0; i < items; i++) {
volk_32u_popcnt(&ret, static_cast<uint32_t>(inbuffer0[i]^inbuffer1[i]));
d_total_errors += ret;
}
d_total += items;
outbuffer[0] = log10(((double)d_total_errors)/(d_total * 8.0));
consume_each(items);
return 1;
}
else {
consume_each(0);
return 0;
}
}
}
} /* namespace fec */
}/* namespace gr */
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