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/*
Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Her Majesty the
Queen in Right of Canada (Communications Research Center Canada)
Copyright (C) 2018
Matthias P. Braendli, matthias.braendli@mpb.li
http://opendigitalradio.org
*/
/*
This file is part of ODR-DabMod.
ODR-DabMod 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-DabMod 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-DabMod. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <cstdint>
#include <memory>
#include <string>
#include <math.h>
#include <stdio.h>
#include "RemoteControl.h"
struct frame_timestamp
{
// Which frame count does this timestamp apply to
int32_t fct;
uint8_t fp; // Frame Phase
uint32_t timestamp_sec;
uint32_t timestamp_pps; // In units of 1/16384000 s
bool timestamp_valid = false;
bool timestamp_refresh;
frame_timestamp& operator+=(const double& diff)
{
double offset_pps, offset_secs;
offset_pps = modf(diff, &offset_secs);
this->timestamp_sec += lrint(offset_secs);
this->timestamp_pps += lrint(offset_pps * 16384000.0);
while (this->timestamp_pps >= 16384000) {
this->timestamp_pps -= 16384000;
this->timestamp_sec += 1;
}
return *this;
}
const frame_timestamp operator+(const double diff) {
frame_timestamp ts = *this;
ts += diff;
return ts;
}
double pps_offset() const {
return timestamp_pps / 16384000.0;
}
double get_real_secs() const {
double t = timestamp_sec;
t += pps_offset();
return t;
}
long long int get_ns() const {
long long int ns = timestamp_sec * 1000000000ull;
ns += llrint((double)timestamp_pps / 0.016384);
return ns;
}
void set_ns(long long int time_ns) {
timestamp_sec = time_ns / 1000000000ull;
const long long int subsecond = time_ns % 1000000000ull;
timestamp_pps = lrint(subsecond * 16384000.0);
}
void print(const char* t) const {
fprintf(stderr,
"%s <frame_timestamp(%s, %d, %.9f, %d)>\n",
t, this->timestamp_valid ? "valid" : "invalid",
this->timestamp_sec, pps_offset(),
this->fct);
}
};
/* This module decodes MNSC time information from an ETI source and
* EDI time information*/
class TimestampDecoder : public RemoteControllable
{
public:
/* offset_s: The modulator adds this offset to the TIST to define time of
* frame transmission
*/
TimestampDecoder(double& offset_s);
std::shared_ptr<frame_timestamp> getTimestamp(void);
/* Update timestamp data from ETI */
void updateTimestampEti(
uint8_t framephase,
uint16_t mnsc,
uint32_t pps, // In units of 1/16384000 s
int32_t fct);
/* Update timestamp data from EDI */
void updateTimestampEdi(
uint32_t seconds_utc,
uint32_t pps, // In units of 1/16384000 s
int32_t fct,
uint8_t framephase);
/*********** REMOTE CONTROL ***************/
/* Base function to set parameters. */
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;
const char* name() { return "TS"; }
protected:
/* Push a new MNSC field into the decoder */
void pushMNSCData(uint8_t framephase, uint16_t mnsc);
/* Each frame contains the TIST field with the PPS offset.
* For each frame, this function must be called to update
* the timestamp.
*
* pps is in units of 1/16384000 s
*
* This function also takes care of updating the second when
* the pps rolls over.
*/
void updateTimestampPPS(uint32_t pps);
/* Update the timestamp when a full set of MNSC data is
* known. This function can be called at most every four
* frames when the data is transferred using the MNSC.
*/
void updateTimestampSeconds(uint32_t secs);
struct tm temp_time;
uint32_t time_secs = 0;
int32_t latestFCT = 0;
uint32_t latestFP = 0;
uint32_t time_pps = 0;
double& timestamp_offset;
int inhibit_second_update = 0;
bool offset_changed = false;
uint32_t time_secs_of_frame0 = 0;
uint32_t time_pps_of_frame0 = 0;
/* When the type or identifier don't match, the decoder must
* be disabled
*/
bool enableDecode = false;
/* Disable timstamps until full time has been received */
bool full_timestamp_received = false;
};
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