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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Her Majesty
the Queen in Right of Canada (Communications Research Center Canada)
Copyright (C) 2017
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
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "Eti.h"
#include "Log.h"
#include "FicSource.h"
#include "SubchannelSource.h"
#include "TimestampDecoder.h"
#include "lib/edi/ETIDecoder.hpp"
#include "lib/UdpSocket.h"
#include "ThreadsafeQueue.h"
#include <vector>
#include <memory>
#include <stdint.h>
#include <sys/types.h>
/* The modulator uses this interface to get the necessary multiplex data,
* either from an ETI or an EDI source.
*/
class EtiSource
{
public:
/* Get the DAB Transmission Mode. Valid values: 1, 2, 3 or 4 */
virtual unsigned getMode() = 0;
/* Get the current Frame Phase */
virtual unsigned getFp() = 0;
/* Returns true if we have valid time stamps in the ETI*/
virtual bool sourceContainsTimestamp() = 0;
virtual void calculateTimestamp(struct frame_timestamp& ts) = 0;
/* Return the FIC source to be used for modulation */
virtual std::shared_ptr<FicSource>& getFic(void);
/* Return all subchannel sources containing MST data */
virtual const std::vector<std::shared_ptr<SubchannelSource> > getSubchannels() const = 0;
protected:
std::shared_ptr<FicSource> myFicSource;
};
/* The EtiReader extracts the necessary data for modulation from an ETI(NI) byte stream. */
class EtiReader : public EtiSource
{
public:
EtiReader(
double& tist_offset_s,
unsigned tist_delay_stages);
virtual unsigned getMode();
virtual unsigned getFp();
/* Read ETI data from dataIn. Returns the number of bytes
* read from the buffer.
*/
int loadEtiData(const Buffer& dataIn);
virtual bool sourceContainsTimestamp();
virtual void calculateTimestamp(struct frame_timestamp& ts);
virtual const std::vector<std::shared_ptr<SubchannelSource> > getSubchannels() const;
private:
/* Transform the ETI TIST to a PPS offset in units of 1/16384000 s */
uint32_t getPPSOffset();
int state;
uint32_t nb_frames;
uint16_t framesize;
eti_SYNC eti_sync;
eti_FC eti_fc;
std::vector<eti_STC> eti_stc;
eti_EOH eti_eoh;
eti_EOF eti_eof;
eti_TIST eti_tist;
TimestampDecoder myTimestampDecoder;
size_t myCurrentFrame;
bool eti_fc_valid;
std::vector<std::shared_ptr<SubchannelSource> > mySources;
};
/* The EdiReader extracts the necessary data using the EDI input library in
* lib/edi
*/
class EdiReader : public EtiSource, public EdiDecoder::DataCollector
{
public:
EdiReader(
double& tist_offset_s,
unsigned tist_delay_stages);
virtual unsigned getMode();
virtual unsigned getFp();
virtual bool sourceContainsTimestamp();
virtual void calculateTimestamp(struct frame_timestamp& ts);
virtual const std::vector<std::shared_ptr<SubchannelSource> > getSubchannels() const;
virtual bool isFrameReady(void);
virtual void clearFrame(void);
// Tell the ETIWriter what EDI protocol we receive in *ptr.
// This is not part of the ETI data, but is used as check
virtual void update_protocol(
const std::string& proto,
uint16_t major,
uint16_t minor);
// Update the data for the frame characterisation
virtual void update_fc_data(const EdiDecoder::eti_fc_data& fc_data);
virtual void update_fic(const std::vector<uint8_t>& fic);
virtual void update_err(uint8_t err);
// In addition to TSTA in ETI, EDI also transports more time
// stamp information.
virtual void update_edi_time(
uint32_t utco,
uint32_t seconds);
virtual void update_mnsc(uint16_t mnsc);
virtual void update_rfu(uint16_t rfu);
virtual void add_subchannel(const EdiDecoder::eti_stc_data& stc);
// Gets called by the EDI library to tell us that all data for a frame was given to us
virtual void assemble(void);
private:
bool m_proto_valid = false;
bool m_frameReady = false;
uint8_t m_err;
bool m_fc_valid = false;
EdiDecoder::eti_fc_data m_fc;
std::vector<uint8_t> m_fic;
bool m_time_valid = false;
uint32_t m_utco;
uint32_t m_seconds;
uint16_t m_mnsc = 0xffff;
// 16 bits: RFU field in EOH
uint16_t m_rfu = 0xffff;
std::map<uint8_t, std::shared_ptr<SubchannelSource> > m_sources;
TimestampDecoder m_timestamp_decoder;
};
/* The EDI input does not use the inputs defined in InputReader.h, as they were
* designed for ETI. It uses the EdiUdpInput which in turn uses a threaded
* receiver.
*/
class EdiUdpInput {
public:
EdiUdpInput(EdiDecoder::ETIDecoder& decoder);
void Open(const std::string& uri);
bool isEnabled(void) const { return m_enabled; }
/* Receive a packet and give it to the decoder. Returns
* true if a packet was received, false in case of socket
* read was interrupted by a signal.
*/
bool rxPacket(void);
private:
bool m_enabled;
int m_port;
UdpReceiver m_udp_rx;
EdiDecoder::ETIDecoder& m_decoder;
};
|
