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/* -*- c++ -*- */
/*
* Copyright 2006,2010,2013 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 "bin_statistics_f_impl.h"
#include <gnuradio/io_signature.h>
#include <string.h>
namespace gr {
namespace blocks {
bin_statistics_f::sptr
bin_statistics_f::make(unsigned int vlen,
msg_queue::sptr msgq,
feval_dd *tune,
size_t tune_delay,
size_t dwell_delay)
{
return gnuradio::get_initial_sptr
(new bin_statistics_f_impl(vlen, msgq, tune,
tune_delay, dwell_delay));
}
bin_statistics_f_impl::bin_statistics_f_impl(unsigned int vlen,
msg_queue::sptr msgq,
feval_dd *tune,
size_t tune_delay,
size_t dwell_delay)
: sync_block("bin_statistics_f",
io_signature::make(1, 1, sizeof(float) * vlen),
io_signature::make(0, 0, 0)),
d_vlen(vlen), d_msgq(msgq), d_tune(tune),
d_tune_delay(tune_delay), d_dwell_delay(dwell_delay),
d_center_freq(0), d_delay(0),
d_max(vlen)
{
enter_init();
}
bin_statistics_f_impl::~bin_statistics_f_impl()
{
}
void
bin_statistics_f_impl::enter_init()
{
d_state = ST_INIT;
d_delay = 0;
}
void
bin_statistics_f_impl::enter_tune_delay()
{
d_state = ST_TUNE_DELAY;
d_delay = d_tune_delay;
d_center_freq = d_tune->calleval(0);
}
void
bin_statistics_f_impl::enter_dwell_delay()
{
d_state = ST_DWELL_DELAY;
d_delay = d_dwell_delay;
reset_stats();
}
void
bin_statistics_f_impl::leave_dwell_delay()
{
send_stats();
}
int
bin_statistics_f_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const float *input = (const float*)input_items[0];
size_t vlen = d_max.size();
int n = 0;
int t;
while(n < noutput_items) {
switch(d_state) {
case ST_INIT:
enter_tune_delay();
break;
case ST_TUNE_DELAY:
t = std::min(noutput_items - n, int(d_delay));
n += t;
d_delay -= t;
assert(d_delay >= 0);
if(d_delay == 0)
enter_dwell_delay();
break;
case ST_DWELL_DELAY:
t = std::min(noutput_items - n, int(d_delay));
for(int i = 0; i < t; i++) {
accrue_stats(&input[n * vlen]);
n++;
}
d_delay -= t;
assert(d_delay >= 0);
if(d_delay == 0) {
leave_dwell_delay();
enter_tune_delay();
}
break;
default:
assert(0);
}
}
return noutput_items;
}
//////////////////////////////////////////////////////////////////////////
// virtual methods for gathering stats
//////////////////////////////////////////////////////////////////////////
void
bin_statistics_f_impl::reset_stats()
{
for (size_t i = 0; i < vlen(); i++){
d_max[i] = 0;
}
}
void
bin_statistics_f_impl::accrue_stats(const float *input)
{
for(size_t i = 0; i < vlen(); i++) {
d_max[i] = std::max(d_max[i], input[i]); // compute per bin maxima
}
}
void
bin_statistics_f_impl::send_stats()
{
if(msgq()->full_p()) // if the queue is full, don't block, drop the data...
return;
// build & send a message
message::sptr msg = message::make(0, center_freq(), vlen(), vlen() * sizeof(float));
memcpy(msg->msg(), &d_max[0], vlen() * sizeof(float));
msgq()->insert_tail(msg);
}
} /* namespace blocks */
} /* namespace gr */
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