| /* -*- c++ -*- */ |
| /* @file |
| * @author Piotr Krysik <ptrkrysik@gmail.com> |
| * @author Vadim Yanitskiy <axilirator@gmail.com> |
| * @section LICENSE |
| * |
| * Gr-gsm 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. |
| * |
| * Gr-gsm 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 gr-gsm; 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 <grgsm/gsmtap.h> |
| |
| #include "txtime_setter_impl.h" |
| |
| namespace gr { |
| namespace gsm { |
| |
| txtime_setter::sptr |
| 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) |
| { |
| return gnuradio::get_initial_sptr |
| (new txtime_setter_impl(init_fn, init_time_secs, |
| init_time_fracs, time_hint_secs, time_hint_fracs, |
| timing_advance, delay_correction)); |
| } |
| |
| /* |
| * The private constructor |
| */ |
| 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 |
| ) : gr::block("txtime_setter", |
| gr::io_signature::make(0, 0, 0), |
| gr::io_signature::make(0, 0, 0)), |
| d_time_hint(time_hint_secs,time_hint_fracs), |
| d_time_ref(init_time_secs,init_time_fracs), |
| d_delay_correction(delay_correction), |
| d_timing_advance(timing_advance), |
| d_fn_ref(init_fn), |
| d_ts_ref(0) |
| { |
| // Register I/O ports |
| message_port_register_in(pmt::mp("fn_time")); |
| message_port_register_in(pmt::mp("bursts_in")); |
| message_port_register_out(pmt::mp("bursts_out")); |
| |
| // Bind message handlers |
| set_msg_handler(pmt::mp("fn_time"), |
| boost::bind(&txtime_setter_impl::process_fn_time_reference, |
| this, _1)); |
| set_msg_handler(pmt::mp("bursts_in"), |
| boost::bind(&txtime_setter_impl::process_txtime_of_burst, |
| this, _1)); |
| } |
| |
| /* |
| * Our virtual destructor. |
| */ |
| txtime_setter_impl::~txtime_setter_impl() |
| { |
| } |
| |
| void txtime_setter_impl::process_fn_time_reference(pmt::pmt_t msg) |
| { |
| pmt::pmt_t not_found = pmt::intern("not_found"); |
| pmt::pmt_t fn_time, time_hint; |
| |
| fn_time = pmt::dict_ref(msg, |
| pmt::intern("fn_time"), not_found); |
| time_hint = pmt::dict_ref(msg, |
| pmt::intern("fn_time"), not_found); |
| |
| if (fn_time != not_found) { |
| uint32_t fn_ref = static_cast<uint32_t> |
| (pmt::to_uint64(pmt::car(pmt::car(fn_time)))); |
| uint32_t ts = static_cast<uint32_t> |
| (pmt::to_uint64(pmt::cdr(pmt::car(fn_time)))); |
| uint64_t time_secs = pmt::to_uint64( |
| pmt::car(pmt::cdr(fn_time))); |
| double time_fracs = pmt::to_double( |
| pmt::cdr(pmt::cdr(fn_time))); |
| |
| set_fn_time_reference(fn_ref, ts, time_secs, time_fracs); |
| } else if (time_hint != not_found) { |
| set_time_hint(pmt::to_uint64(pmt::car(fn_time)), |
| pmt::to_double(pmt::cdr(fn_time))); |
| } |
| } |
| |
| void txtime_setter_impl::process_txtime_of_burst(pmt::pmt_t msg_in) |
| { |
| // Nothing to do... |
| if (d_fn_ref == 0xffffffff) |
| return; |
| |
| pmt::pmt_t blob = pmt::cdr(msg_in); |
| |
| // Extract GSMTAP header from message |
| gsmtap_hdr *header = (gsmtap_hdr *) pmt::blob_data(blob); |
| uint32_t frame_nr = be32toh(header->frame_number); |
| uint32_t ts_num = header->timeslot; |
| |
| time_format txtime = fn_time_delta_cpp(d_fn_ref, d_time_ref, |
| frame_nr, d_time_hint, ts_num, d_ts_ref); |
| |
| time_spec_t txtime_spec = time_spec_t(txtime.first, txtime.second); |
| txtime_spec -= d_delay_correction; |
| txtime_spec -= d_timing_advance; |
| |
| // FIXME: better name? |
| time_spec_t foo = time_spec_t(d_time_hint.first, d_time_hint.second); |
| |
| // Drop too late / early bursts |
| if (txtime_spec <= foo) { |
| std::cout << "lB" << std::flush; |
| return; |
| } else if (txtime_spec > foo + 10.0) { |
| std::cout << "eB" << std::flush; |
| return; |
| } |
| |
| 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())) |
| ); |
| |
| tags_dict = pmt::dict_add(tags_dict, |
| pmt::intern("fn"), pmt::from_uint64(frame_nr)); |
| tags_dict = pmt::dict_add(tags_dict, |
| pmt::intern("ts"), pmt::from_uint64(ts_num)); |
| |
| // Send a message to the output |
| pmt::pmt_t msg_out = pmt::cons(tags_dict, pmt::cdr(msg_in)); |
| message_port_pub(pmt::mp("bursts_out"), msg_out); |
| } |
| |
| void txtime_setter_impl::set_fn_time_reference( |
| uint32_t fn, uint32_t ts, uint64_t time_secs, |
| double time_fracs) |
| { |
| d_fn_ref = fn; |
| d_ts_ref = ts; |
| d_time_ref = std::make_pair(time_secs, time_fracs); |
| set_time_hint(time_secs, time_fracs); |
| } |
| |
| void txtime_setter_impl::set_time_hint( |
| uint64_t time_hint_secs, double time_hint_fracs) |
| { |
| d_time_hint = std::make_pair(time_hint_secs, time_hint_fracs); |
| } |
| |
| void txtime_setter_impl::set_delay_correction(double delay_correction) |
| { |
| d_delay_correction = delay_correction; |
| } |
| |
| void txtime_setter_impl::set_timing_advance(double timing_advance) |
| { |
| d_timing_advance = timing_advance; |
| } |
| |
| } /* namespace gsm */ |
| } /* namespace gr */ |