aboutsummaryrefslogtreecommitdiffstats
path: root/src/fig/FIG0_8.cpp
blob: c2f8365e9cda1374b2e4cd2d7e48fcee9a6820db (plain)
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
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
/*
   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) 2016
   Matthias P. Braendli, matthias.braendli@mpb.li
   */
/*
   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/>.
*/

#include "fig/FIG0structs.h"
#include "fig/FIG0_8.h"
#include "utils.h"

namespace FIC {

struct FIGtype0_8_short {
    uint8_t SCIdS:4;
    uint8_t rfa_1:3;
    uint8_t ext:1;
    uint8_t Id:6;
    uint8_t MscFic:1;
    uint8_t LS:1;
    uint8_t rfa_2;
} PACKED;

struct FIGtype0_8_long {
    uint8_t SCIdS:4;
    uint8_t rfa_1:3;
    uint8_t ext:1;
    uint8_t SCId_high:4;
    uint8_t rfa:3;
    uint8_t LS:1;
    uint8_t SCId_low;
    uint8_t rfa_2;
    void setSCId(uint16_t id) {
        SCId_high = id >> 8;
        SCId_low = id & 0xff;
    }
    uint16_t getSCid() {
        return (SCId_high << 8) | SCId_low;
    }
} PACKED;

FIG0_8::FIG0_8(FIGRuntimeInformation *rti) :
    m_rti(rti),
    m_initialised(false),
    m_transmit_programme(false)
{
}

FillStatus FIG0_8::fill(uint8_t *buf, size_t max_size)
{
    FillStatus fs;
    auto ensemble = m_rti->ensemble;
    ssize_t remaining = max_size;

    if (not m_initialised) {
        componentFIG0_8 = m_rti->ensemble->components.end();
        m_initialised = true;
    }

    FIGtype0* fig0 = NULL;

    for (; componentFIG0_8 != ensemble->components.end();
            ++componentFIG0_8) {

        auto service = getService(*componentFIG0_8,
                ensemble->services);
        auto subchannel = getSubchannel(ensemble->subchannels,
                (*componentFIG0_8)->subchId);

        if (subchannel == ensemble->subchannels.end()) {
            etiLog.log(error,
                    "Subchannel %i does not exist for component "
                    "of service %i",
                    (*componentFIG0_8)->subchId,
                    (*componentFIG0_8)->serviceId);
            continue;
        }

        if (m_transmit_programme and (*service)->isProgramme(ensemble)) {
            const int required_size =
                ((*subchannel)->type == subchannel_type_t::Packet ? 5 : 4);

            if (fig0 == NULL) {
                if (remaining < 2 + required_size) {
                    break;
                }
                fig0 = (FIGtype0*)buf;
                fig0->FIGtypeNumber = 0;
                fig0->Length = 1;
                fig0->CN = 0;
                fig0->OE = 0;
                fig0->PD = 0;
                fig0->Extension = 8;
                buf += 2;
                remaining -= 2;
            }
            else if (remaining < required_size) {
                break;
            }

            if ((*subchannel)->type == subchannel_type_t::Packet) { // Data packet
                buf[0] = ((*componentFIG0_8)->serviceId >> 8) & 0xFF;
                buf[1] = ((*componentFIG0_8)->serviceId) & 0xFF;
                fig0->Length += 2;
                buf += 2;
                remaining -= 2;

                FIGtype0_8_long* definition = (FIGtype0_8_long*)buf;
                memset(definition, 0, 3);
                definition->ext = 0;    // no rfa
                definition->SCIdS = (*componentFIG0_8)->SCIdS;
                definition->LS = 1;
                definition->setSCId((*componentFIG0_8)->packet.id);
                fig0->Length += 3;
                buf += 3;             // 8 minus rfa
                remaining -= 3;
            }
            else {    // Audio, data stream
                buf[0] = ((*componentFIG0_8)->serviceId >> 8) & 0xFF;
                buf[1] = ((*componentFIG0_8)->serviceId) & 0xFF;

                fig0->Length += 2;
                buf += 2;
                remaining -= 2;

                FIGtype0_8_short* definition = (FIGtype0_8_short*)buf;
                memset(definition, 0, 2);
                definition->ext = 0;    // no rfa
                definition->SCIdS = (*componentFIG0_8)->SCIdS;
                definition->LS = 0;
                definition->MscFic = 0;
                definition->Id = (*componentFIG0_8)->subchId;
                fig0->Length += 2;
                buf += 2;             // 4 minus rfa
                remaining -= 2;
            }
        }
        else if (!m_transmit_programme and !(*service)->isProgramme(ensemble)) {
            // Data
            const int required_size =
                ((*subchannel)->type == subchannel_type_t::Packet ? 7 : 6);

            if (fig0 == NULL) {
                if (remaining < 2 + required_size) {
                    break;
                }
                fig0 = (FIGtype0*)buf;
                fig0->FIGtypeNumber = 0;
                fig0->Length = 1;
                fig0->CN = 0;
                fig0->OE = 0;
                fig0->PD = 1;
                fig0->Extension = 8;
                buf += 2;
                remaining -= 2;
            }
            else if (remaining < required_size) {
                break;
            }

            if ((*subchannel)->type == subchannel_type_t::Packet) { // Data packet
                buf[0] = ((*componentFIG0_8)->serviceId >> 24) & 0xFF;
                buf[1] = ((*componentFIG0_8)->serviceId >> 16) & 0xFF;
                buf[2] = ((*componentFIG0_8)->serviceId >> 8) & 0xFF;
                buf[3] = ((*componentFIG0_8)->serviceId) & 0xFF;
                fig0->Length += 4;
                buf += 4;
                remaining -= 4;

                FIGtype0_8_long* definition = (FIGtype0_8_long*)buf;
                memset(definition, 0, 3);
                definition->ext = 0;    // no rfa
                definition->SCIdS = (*componentFIG0_8)->SCIdS;
                definition->LS = 1;
                definition->setSCId((*componentFIG0_8)->packet.id);
                fig0->Length += 3;
                buf += 3;             // 8 minus rfa
                remaining -= 3;
            }
            else {    // Audio, data stream
                buf[0] = ((*componentFIG0_8)->serviceId >> 24) & 0xFF;
                buf[1] = ((*componentFIG0_8)->serviceId >> 16) & 0xFF;
                buf[2] = ((*componentFIG0_8)->serviceId >> 8) & 0xFF;
                buf[3] = ((*componentFIG0_8)->serviceId) & 0xFF;
                fig0->Length += 4;
                buf += 4;
                remaining -= 4;

                FIGtype0_8_short* definition = (FIGtype0_8_short*)buf;
                memset(definition, 0, 2);
                definition->ext = 0;    // no rfa
                definition->SCIdS = (*componentFIG0_8)->SCIdS;
                definition->LS = 0;
                definition->MscFic = 0;
                definition->Id = (*componentFIG0_8)->subchId;
                fig0->Length += 2;
                buf += 2;             // 4 minus rfa
                remaining -= 2;
            }
        }
    }

    if (componentFIG0_8 == ensemble->components.end()) {
        componentFIG0_8 = ensemble->components.begin();

        // The full database is sent every second full loop
        fs.complete_fig_transmitted = m_transmit_programme;

        m_transmit_programme = not m_transmit_programme;
        // Alternate between data and and programme FIG0/13,
        // do not mix fig0 with PD=0 with extension 13 stuff
        // that actually needs PD=1, and vice versa
    }

    fs.num_bytes_written = max_size - remaining;
    return fs;
}

}