1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/*
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 <queue>
#include <memory>
#include <string>
#include <time.h>
#include <math.h>
#include <stdio.h>
#include "Eti.h"
#include "Log.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() = default;
frame_timestamp(const frame_timestamp& other) = default;
frame_timestamp& operator=(const frame_timestamp &rhs)
{
if (this != &rhs) {
this->timestamp_sec = rhs.timestamp_sec;
this->timestamp_pps = rhs.timestamp_pps;
this->timestamp_valid = rhs.timestamp_valid;
this->timestamp_refresh = rhs.timestamp_refresh;
this->fct = rhs.fct;
this->fp = rhs.fp;
}
return *this;
}
frame_timestamp& operator+=(const double& diff)
{
double offset_pps, offset_secs;
offset_pps = modf(diff, &offset_secs);
this->timestamp_sec += lrintf(offset_secs);
this->timestamp_pps += lrintf(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 += timestamp_pps;
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 print(const char* t)
{
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;
/* 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;
};
|
