140 lines
5.5 KiB
C++
140 lines
5.5 KiB
C++
/* -*- c++ -*- */
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/* @file
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* @author Piotr Krysik <ptrkrysik@gmail.com>
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* @section LICENSE
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*
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* Gr-gsm is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* Gr-gsm is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with gr-gsm; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gnuradio/io_signature.h>
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#include <grgsm/gsmtap.h>
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#include "txtime_setter_impl.h"
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namespace gr {
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namespace gsm {
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txtime_setter::sptr
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txtime_setter::make(uint32_t init_fn, uint64_t init_time_secs, double init_time_fracs, uint64_t time_hint_secs, double time_hint_fracs, double timing_advance, double delay_correction)
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{
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return gnuradio::get_initial_sptr
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(new txtime_setter_impl(init_fn, init_time_secs, init_time_fracs, time_hint_secs, time_hint_fracs, timing_advance, delay_correction));
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}
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/*
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* The private constructor
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*/
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txtime_setter_impl::txtime_setter_impl(uint32_t init_fn, uint64_t init_time_secs, double init_time_fracs, uint64_t time_hint_secs, double time_hint_fracs, double timing_advance, double delay_correction)
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: gr::block("txtime_setter",
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gr::io_signature::make(0, 0, 0),
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gr::io_signature::make(0, 0, 0)),
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d_fn_ref(init_fn),
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d_ts_ref(0),
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d_time_ref(init_time_secs,init_time_fracs),
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d_time_hint(time_hint_secs,time_hint_fracs),
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d_timing_advance(timing_advance),
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d_delay_correction(delay_correction)
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{
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message_port_register_in(pmt::intern("fn_time"));
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message_port_register_in(pmt::intern("bursts_in"));
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message_port_register_out(pmt::intern("bursts_out"));
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set_msg_handler(pmt::intern("fn_time"), boost::bind(&txtime_setter_impl::process_fn_time_reference, this, _1));
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set_msg_handler(pmt::intern("bursts_in"), boost::bind(&txtime_setter_impl::process_txtime_of_burst, this, _1));
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}
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/*
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* Our virtual destructor.
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*/
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txtime_setter_impl::~txtime_setter_impl()
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{
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}
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void txtime_setter_impl::process_fn_time_reference(pmt::pmt_t msg)
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{
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// d_time_hint = pmt::to_python(pmt::dict_ref(msg, pmt::intern("time_hint"), pmt::PMT_NIL))
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pmt::pmt_t not_found = pmt::intern("not_found");
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pmt::pmt_t fn_time = pmt::dict_ref(msg, pmt::intern("fn_time"), not_found);
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pmt::pmt_t time_hint = pmt::dict_ref(msg, pmt::intern("fn_time"), not_found);
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if(fn_time != not_found)
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{
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uint32_t fn_ref = static_cast<uint32_t>(pmt::to_uint64(pmt::car(pmt::car(fn_time))));
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uint32_t ts = static_cast<uint32_t>(pmt::to_uint64(pmt::cdr(pmt::car(fn_time))));
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uint64_t time_secs = pmt::to_uint64(pmt::car(pmt::cdr(fn_time)));
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double time_fracs = pmt::to_double(pmt::cdr(pmt::cdr(fn_time)));
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set_fn_time_reference(fn_ref, ts, time_secs, time_fracs);
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} else if(time_hint != not_found) {
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set_time_hint(pmt::to_uint64(pmt::car(fn_time)), pmt::to_double(pmt::cdr(fn_time)));
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}
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}
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void txtime_setter_impl::process_txtime_of_burst(pmt::pmt_t burst)
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{
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pmt::pmt_t header_plus_burst = pmt::cdr(burst);
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int8_t * burst_int8 = (int8_t *)pmt::blob_data(header_plus_burst);
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gsmtap_hdr * header = (gsmtap_hdr *)(burst_int8);
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uint32_t frame_nr = be32toh(header->frame_number);
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uint32_t ts_num = header->timeslot;
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if(d_fn_ref != 0xffffffff)
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{
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time_format txtime = fn_time_delta_cpp(d_fn_ref, d_time_ref, frame_nr, d_time_hint, ts_num, d_ts_ref);
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time_spec_t txtime_spec = time_spec_t(txtime.first, txtime.second);
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txtime_spec = txtime_spec - d_delay_correction;
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txtime_spec = txtime_spec - d_timing_advance;
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pmt::pmt_t tags_dict = pmt::dict_add(pmt::make_dict(), pmt::intern("tx_time"), pmt::make_tuple(pmt::from_uint64(txtime_spec.get_full_secs()),pmt::from_double(txtime_spec.get_frac_secs())));
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tags_dict = pmt::dict_add(tags_dict, pmt::intern("fn"), pmt::from_uint64(frame_nr));
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tags_dict = pmt::dict_add(tags_dict, pmt::intern("ts"), pmt::from_uint64(ts_num));
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pmt::pmt_t new_msg = pmt::cons(tags_dict, pmt::cdr(burst));
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message_port_pub(pmt::intern("bursts_out"), new_msg);
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}
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}
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void txtime_setter_impl::set_fn_time_reference(uint32_t fn, uint32_t ts, uint64_t time_secs, double time_fracs)
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{
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d_fn_ref = fn;
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d_ts_ref = ts;
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d_time_ref = std::make_pair(time_secs, time_fracs);
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set_time_hint(time_secs, time_fracs);
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}
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void txtime_setter_impl::set_time_hint(uint64_t time_hint_secs, double time_hint_fracs)
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{
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d_time_hint = std::make_pair(time_hint_secs, time_hint_fracs);
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}
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void txtime_setter_impl::set_delay_correction(double delay_correction)
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{
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d_delay_correction = delay_correction;
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}
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void txtime_setter_impl::set_timing_advance(double timing_advance)
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{
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d_timing_advance = timing_advance;
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}
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} /* namespace gsm */
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} /* namespace gr */
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