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/*
Copyright (C) 2014 CSP Innovazione nelle ICT s.c.a r.l. (http://www.csp.it/)
Copyright (C) 2016 Matthias P. Braendli (http://www.opendigitalradio.org)
Copyright (C) 2015 Data Path
This program 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
Authors:
Sergio Sagliocco <sergio.sagliocco@csp.it>
Matthias P. Braendli <matthias@mpb.li>
/ | |- ')|) |-|_ _ (|,_ .| _ ,_ \
Data Path \(|(||_(|/_| (||_||(a)_||||(|||.(_()|||/
*/
#include "figs.hpp"
#include <cstdio>
#include <cstring>
#include <map>
#include <unordered_set>
static std::unordered_set<int> links_seen;
bool fig0_6_is_complete(int link_key)
{
bool complete = links_seen.count(link_key);
if (complete) {
links_seen.clear();
}
else {
links_seen.insert(link_key);
}
return complete;
}
// map between fig 0/6 database key and LA to detect activation and deactivation of links
static std::map<uint16_t, bool> fig0_6_key_la;
void fig0_6_cleardb()
{
fig0_6_key_la.clear();
}
// FIG 0/6 Service linking information
// ETSI EN 300 401 8.1.15
bool fig0_6(fig0_common_t& fig0, int indent)
{
uint32_t j;
uint16_t LSN, key;
uint8_t i = 1, Number_of_Ids, IdLQ;
char signal_link[256];
char desc[256];
bool Id_list_flag, LA, SH, ILS, Shd;
bool complete = false;
uint8_t* f = fig0.f;
while (i < (fig0.figlen - 1)) {
// iterate over service linking
Id_list_flag = (f[i] >> 7) & 0x01;
LA = (f[i] >> 6) & 0x01;
SH = (f[i] >> 5) & 0x01;
ILS = (f[i] >> 4) & 0x01;
LSN = ((f[i] & 0x0F) << 8) | f[i+1];
key = (fig0.oe() << 15) | (fig0.pd() << 14) | (SH << 13) | (ILS << 12) | LSN;
complete |= fig0_6_is_complete(key);
strcpy(signal_link, "");
// check activation / deactivation
if ((fig0_6_key_la.count(key) > 0) && (fig0_6_key_la[key] != LA)) {
if (LA == 0) {
strcat(signal_link, " deactivated");
}
else {
strcat(signal_link, " activated");
}
}
fig0_6_key_la[key] = LA;
i += 2;
if (Id_list_flag == 0) {
if (fig0.cn() == 0) { // Id_list_flag=0 && fig0.cn()=0: CEI Change Event Indication
strcat(signal_link, " CEI");
}
sprintf(desc, "Id list flag=%d, LA=%d %s, S/H=%d %s, ILS=%d %s, LSN=%d, database key=0x%04x%s",
Id_list_flag, LA, (LA)?"active":"inactive", SH, (SH)?"Hard":"Soft", ILS, (ILS)?"international":"national", LSN, key, signal_link);
printbuf(desc, indent+1, NULL, 0);
}
else { // Id_list_flag == 1
if (i < fig0.figlen) {
Number_of_Ids = (f[i] & 0x0F);
if (fig0.pd() == 0) {
IdLQ = (f[i] >> 5) & 0x03;
Shd = (f[i] >> 4) & 0x01;
sprintf(desc, "Id list flag=%d, LA=%d %s, S/H=%d %s, ILS=%d %s, LSN=%d, database key=0x%04x, IdLQ=%d, Shd=%d %s, Number of Ids=%d%s",
Id_list_flag, LA, (LA)?"active":"inactive", SH, (SH)?"Hard":"Soft", ILS, (ILS)?"international":"national", LSN, key, IdLQ, Shd, (Shd)?"b11-8 in 4-F are different services":"single service", Number_of_Ids, signal_link);
printbuf(desc, indent+1, NULL, 0);
if (ILS == 0) {
// read Id list
for(j = 0; ((j < Number_of_Ids) && ((i+2+(j*2)) < fig0.figlen)); j++) {
// ETSI EN 300 401 8.1.15:
// The IdLQ shall not apply to the first entry in the Id list when fig0.oe() = "0" and
// when the version number of the type 0 field is set to "0" (using the C/N flag, see clause 5.2.2.1)
// ... , the first entry in the Id list of each Service linking field shall be
// the SId that applies to the service in the ensemble.
if (((j == 0) && (fig0.oe() == 0) && (fig0.cn() == 0)) ||
(IdLQ == 0)) {
sprintf(desc, "DAB SId 0x%X", ((f[i+1+(j*2)] << 8) | f[i+2+(j*2)]));
}
else if (IdLQ == 1) {
sprintf(desc, "RDS PI 0x%X", ((f[i+1+(j*2)] << 8) | f[i+2+(j*2)]));
}
else if (IdLQ == 2) {
sprintf(desc, "AM-FM service 0x%X", ((f[i+1+(j*2)] << 8) | f[i+2+(j*2)]));
}
else { // IdLQ == 3
sprintf(desc, "invalid ILS IdLQ configuration");
}
printbuf(desc, indent+2, NULL, 0);
}
// check deadlink
if ((Number_of_Ids == 0) && (IdLQ == 1)) {
sprintf(desc, "deadlink");
printbuf(desc, indent+2, NULL, 0);
}
i += (Number_of_Ids * 2) + 1;
}
else { // fig0.pd() == 0 && ILS == 1
// read Id list
for(j = 0; ((j < Number_of_Ids) && ((i+3+(j*3)) < fig0.figlen)); j++) {
// ETSI EN 300 401 8.1.15:
// The IdLQ shall not apply to the first entry in the Id list when fig0.oe() = "0" and
// when the version number of the type 0 field is set to "0" (using the C/N flag, see clause 5.2.2.1)
// ... , the first entry in the Id list of each Service linking field shall be
// the SId that applies to the service in the ensemble.
if (((j == 0) && (fig0.oe() == 0) && (fig0.cn() == 0)) ||
(IdLQ == 0)) {
sprintf(desc, "DAB SId ecc 0x%02X Id 0x%04X", f[i+1+(j*3)], ((f[i+2+(j*3)] << 8) | f[i+3+(j*3)]));
}
else if (IdLQ == 1) {
sprintf(desc, "RDS PI ecc 0x%02X Id 0x%04X", f[i+1+(j*3)], ((f[i+2+(j*3)] << 8) | f[i+3+(j*3)]));
}
else if (IdLQ == 2) {
sprintf(desc, "AM-FM service ecc 0x%02X Id 0x%04X", f[i+1+(j*3)], ((f[i+2+(j*3)] << 8) | f[i+3+(j*3)]));
}
else { // IdLQ == 3
sprintf(desc, "DRM/AMSS service ecc 0x%02X Id 0x%04X", f[i+1+(j*3)], ((f[i+2+(j*3)] << 8) | f[i+3+(j*3)]));
}
printbuf(desc, indent+2, NULL, 0);
}
// check deadlink
if ((Number_of_Ids == 0) && (IdLQ == 1)) {
sprintf(desc, "deadlink");
printbuf(desc, indent+2, NULL, 0);
}
i += (Number_of_Ids * 3) + 1;
}
}
else { // fig0.pd() == 1
sprintf(desc, "Id list flag=%d, LA=%d %s, S/H=%d %s, ILS=%d %s, LSN=%d, database key=0x%04x, Number of Ids=%d%s",
Id_list_flag, LA, (LA)?"active":"inactive", SH, (SH)?"Hard":"Soft", ILS, (ILS)?"international":"national", LSN, key, Number_of_Ids, signal_link);
printbuf(desc, indent+1, NULL, 0);
if (Number_of_Ids > 0) {
// read Id list
for(j = 0; ((j < Number_of_Ids) && ((i+4+(j*4)) < fig0.figlen)); j++) {
sprintf(desc, "SId 0x%X",
((f[i+1+(j*4)] << 24) | (f[i+2+(j*4)] << 16) | (f[i+3+(j*4)] << 8) | f[i+4+(j*4)]));
printbuf(desc, indent+2, NULL, 0);
}
}
i += (Number_of_Ids * 4) + 1;
}
}
}
}
return complete;
}
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