161 lines
4.3 KiB
C++
161 lines
4.3 KiB
C++
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/*
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* (C) 2022 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
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* All Rights Reserved
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*
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* Author: Eric Wild <ewild@sysmocom.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "GSMCommon.h"
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#include <atomic>
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#include <cassert>
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#include <complex>
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#include <iostream>
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#include <cstdlib>
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#include <cstdio>
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#include <thread>
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#include <fstream>
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#include "ms.h"
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extern "C" {
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#include "sch.h"
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}
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#include "threadsched.h"
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dummylog ms_trx::dummy_log;
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#ifdef DBGXX
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const int offsetrange = 200;
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const int offset_start = -15;
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static int offset_ctr = 0;
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#endif
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template <>
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std::atomic<bool> ms_trx::base::stop_lower_threads_flag(false);
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int ms_trx::init_dev_and_streams()
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{
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int status = 0;
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status = init_device(rx_bh(), tx_bh());
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if (status < 0) {
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std::cerr << "failed to init dev!" << std::endl;
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return -1;
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}
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return status;
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}
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bh_fn_t ms_trx::rx_bh()
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{
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return [this](dev_buf_t *rcd) -> int {
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if (this->search_for_sch(rcd) == SCH_STATE::FOUND)
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this->grab_bursts(rcd);
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return 0;
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};
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}
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bh_fn_t ms_trx::tx_bh()
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{
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return [this](dev_buf_t *rcd) -> int {
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunused-variable"
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auto y = this;
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#pragma GCC diagnostic pop
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/* nothing to do here */
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return 0;
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};
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}
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void ms_trx::start_lower_ms()
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{
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if (stop_lower_threads_flag)
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return;
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auto fn = get_rx_burst_handler_fn(rx_bh());
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lower_rx_task = spawn_worker_thread(sched_params::thread_names::RXRUN, fn, this);
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usleep(1000);
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auto fn2 = get_tx_burst_handler_fn(tx_bh());
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lower_tx_task = spawn_worker_thread(sched_params::thread_names::TXRUN, fn2, this);
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actually_enable_streams();
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}
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void ms_trx::set_upper_ready(bool is_ready)
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{
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upper_is_ready = is_ready;
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}
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void ms_trx::stop_threads()
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{
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std::cerr << "killing threads..." << std::endl;
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stop_lower_threads_flag = true;
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close_device();
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std::cerr << "dev closed..." << std::endl;
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pthread_join(lower_rx_task, nullptr);
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std::cerr << "L rx dead..." << std::endl;
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pthread_join(lower_tx_task, nullptr);
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std::cerr << "L tx dead..." << std::endl;
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}
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void ms_trx::submit_burst(blade_sample_type *buffer, int len, GSM::Time target)
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{
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int64_t now_ts;
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GSM::Time now_time;
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target.incTN(3); // ul dl offset
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int target_fn = target.FN();
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int target_tn = target.TN();
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timekeeper.get_both(&now_time, &now_ts);
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auto diff_fn = GSM::FNDelta(target_fn, now_time.FN());
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int diff_tn = (target_tn - (int)now_time.TN()) % 8;
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auto tosend = GSM::Time(diff_fn, 0);
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if (diff_tn > 0)
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tosend.incTN(diff_tn);
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else
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tosend.decTN(-diff_tn);
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// in theory fn equal and tn+3 equal is also a problem...
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if (diff_fn < 0 || (diff_fn == 0 && (target_tn-now_time.TN() < 3))) {
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std::cerr << "## TX too late?! fn DIFF:" << diff_fn << " tn LOCAL: " << now_time.TN()
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<< " tn OTHER: " << target_tn << std::endl;
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return;
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}
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int64_t send_ts = now_ts + tosend.FN() * 8 * ONE_TS_BURST_LEN + tosend.TN() * ONE_TS_BURST_LEN - timing_advance;
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#ifdef DBGXX
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auto check = now_time + tosend;
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std::cerr << "## fn DIFF: " << diff_fn << " ## tn DIFF: " << diff_tn << " tn LOCAL/OTHER: " << now_time.TN()
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<< "/" << target_tn << " tndiff" << diff_tn << " tosend:" << tosend.FN() << ":" << tosend.TN()
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<< " check: " << check.FN() << ":" << check.TN() << " target: " << target.FN() << ":" << target.TN()
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<< " ts now: " << now_ts << " target ts:" << send_ts << std::endl;
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#endif
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#if 0
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auto check = now_time + tosend;
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unsigned int pad = 4 * 4;
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blade_sample_type buf2[len + pad];
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std::fill(buf2, buf2 + pad, 0);
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memcpy(&buf2[pad], buffer, len * sizeof(blade_sample_type));
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assert(target.FN() == check.FN());
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assert(target.TN() == check.TN());
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submit_burst_ts(buf2, len + pad, send_ts - pad);
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#else
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submit_burst_ts(buffer, len, send_ts);
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#endif
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}
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