kopia lustrzana https://github.com/proto17/dji_droneid
102 wiersze
4.0 KiB
C++
102 wiersze
4.0 KiB
C++
/* -*- c++ -*- */
|
|
/*
|
|
* Copyright 2022 gr-droneid author.
|
|
*
|
|
* This 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.
|
|
*
|
|
* This software 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 this software; 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 <gnuradio/io_signature.h>
|
|
#include "extractor_impl.h"
|
|
|
|
namespace gr {
|
|
namespace droneid {
|
|
|
|
extractor::sptr
|
|
extractor::make(double sample_rate) {
|
|
return gnuradio::get_initial_sptr
|
|
(new extractor_impl(sample_rate));
|
|
}
|
|
|
|
|
|
/*
|
|
* The private constructor
|
|
*/
|
|
extractor_impl::extractor_impl(double sample_rate)
|
|
: gr::sync_block("extractor",
|
|
gr::io_signature::make2(2, 2, sizeof(gr_complex), sizeof(float)),
|
|
gr::io_signature::make(0, 0, 0)), fft_size_(round(sample_rate / CARRIER_SPACING)),
|
|
long_cp_len_(round(sample_rate / 192000)), short_cp_len_(round(0.0000046875 * sample_rate)),
|
|
extract_samples_count_((fft_size_ * 11) + (long_cp_len_ * 2) + (short_cp_len_ * 7) + (fft_size_ * 2)){
|
|
this->message_port_register_out(pmt::mp("pdus"));
|
|
|
|
buffer_.resize(extract_samples_count_);
|
|
current_state_ = state_t::WAITING_FOR_THRESHOLD;
|
|
collected_samples_ = 0;
|
|
}
|
|
|
|
/*
|
|
* Our virtual destructor.
|
|
*/
|
|
extractor_impl::~extractor_impl() {
|
|
}
|
|
|
|
int
|
|
extractor_impl::work(int noutput_items,
|
|
gr_vector_const_void_star &input_items,
|
|
gr_vector_void_star &output_items) {
|
|
const gr_complex *samples = (const gr_complex *) input_items[0];
|
|
const float *correlation_scores = (const float *) input_items[1];
|
|
|
|
for (int idx = 0; idx < noutput_items; idx++) {
|
|
switch (current_state_) {
|
|
case state_t::WAITING_FOR_THRESHOLD: {
|
|
if (correlation_scores[idx] > 0.7) {
|
|
std::cout << "Found burst\n";
|
|
current_state_ = state_t::COLLECTING_SAMPLES;
|
|
collected_samples_ = 1;
|
|
buffer_[0] = samples[idx];
|
|
}
|
|
break;
|
|
}
|
|
|
|
case state_t::COLLECTING_SAMPLES: {
|
|
buffer_[collected_samples_++] = samples[idx];
|
|
if (collected_samples_ == extract_samples_count_) {
|
|
current_state_ = state_t::WAITING_FOR_THRESHOLD;
|
|
pmt::pmt_t pdu = pmt::init_c32vector(buffer_.size(), buffer_);
|
|
std::cout << "moo: " << pmt::is_uniform_vector(pdu) << "\n";
|
|
std::cout << "Sending message with " << pmt::length(pdu) << " elements (" << extract_samples_count_ << ")\n";
|
|
message_port_pub(pmt::mp("pdus"), pmt::cons(pmt::make_dict(), pdu));
|
|
|
|
collected_samples_ = 0;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// Do <+signal processing+>
|
|
|
|
// Tell runtime system how many output items we produced.
|
|
return noutput_items;
|
|
}
|
|
|
|
} /* namespace droneid */
|
|
} /* namespace gr */
|