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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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