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-/*
- Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
- 2011, 2012 Her Majesty the Queen in Right of Canada (Communications
- Research Center Canada)
-
- Copyright (C) 2019
- Matthias P. Braendli, matthias.braendli@mpb.li
-
- http://www.opendigitalradio.org
- */
-/*
- This file is part of ODR-DabMux.
-
- ODR-DabMux 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 of the
- License, or (at your option) any later version.
-
- ODR-DabMux 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 ODR-DabMux. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/* The EDI output needs TAI clock, according to ETSI TS 102 693 Annex F
- * "EDI Timestamps". This module can set the local CLOCK_TAI clock by
- * setting the TAI-UTC offset using adjtimex.
- *
- * This functionality requires Linux 3.10 (30 Jun 2013) or newer.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <sstream>
-#include <chrono>
-#include <future>
-#include <mutex>
-#include <string>
-#include <vector>
-#include "RemoteControl.h"
-
-// EDI needs to know UTC-TAI, but doesn't need the CLOCK_TAI to be set.
-// We can keep this code, maybe for future use
-#define SUPPORT_SETTING_CLOCK_TAI 0
-
-/* Loads, parses and represents TAI-UTC offset information from the IETF bulletin */
-class ClockTAI : public RemoteControllable {
- public:
- ClockTAI(const std::vector<std::string>& bulletin_urls);
-
- // Fetch the bulletin from the IETF website and return the current
- // TAI-UTC offset.
- // Throws runtime_error on failure.
- int get_offset(void);
-
-#if SUPPORT_SETTING_CLOCK_TAI
- // Update the local TAI clock according to the TAI-UTC offset
- // return 0 on success
- int update_local_tai_clock(int offset);
-#endif
-
- private:
- class download_failed {};
-
- // Either retrieve the bulletin from the cache or if necessarly
- // download it, and calculate the TAI-UTC offset.
- // Returns the offset or throws download_failed or a range_error
- // if the offset is out of bounds.
- int get_valid_offset(void);
-
- // Download of new bulletin is done asynchronously
- std::future<int> m_offset_future;
-
- // Protect all data members, as RC functions are in another thread
- mutable std::mutex m_data_mutex;
-
- // The currently used TAI-UTC offset
- int m_offset = 0;
- int m_offset_valid = false;
-
- std::vector<std::string> m_bulletin_urls;
-
- std::string m_bulletin;
- std::chrono::system_clock::time_point m_bulletin_download_time;
-
- // Update the cache file with the current m_bulletin
- void update_cache(const char* cache_filename);
-
-
- /* Remote control */
- virtual void set_parameter(const std::string& parameter,
- const std::string& value);
-
- /* Getting a parameter always returns a string. */
- virtual const std::string get_parameter(const std::string& parameter) const;
-};
-