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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> regions_seen;
+
+bool fig0_21_is_complete(int region_id)
+{
+ bool complete = regions_seen.count(region_id);
+
+ if (complete) {
+ regions_seen.clear();
+ }
+ else {
+ regions_seen.insert(region_id);
+ }
+
+ return complete;
+}
+
+
+// FIG 0/21 Frequency Information
+// ETSI EN 300 401 8.1.8
+bool fig0_21(fig0_common_t& fig0, int indent)
+{
+ float freq;
+ uint32_t ifreq;
+ uint64_t key;
+ uint16_t RegionId, Id_field;
+ uint8_t i = 1, j, k, Length_FI_list, RandM, Length_Freq_list, Control_field;
+ uint8_t Control_field_trans_mode, Id_field2;
+ char tmpbuf[256];
+ char desc[256];
+ bool Continuity_flag;
+ uint8_t* f = fig0.f;
+ bool complete = false;
+
+ while (i < (fig0.figlen - 1)) {
+ // iterate over frequency information
+ // decode RegionId, Length of FI list
+ RegionId = (f[i] << 3) | (f[i+1] >> 5);
+ complete |= fig0_21_is_complete(RegionId);
+ Length_FI_list = (f[i+1] & 0x1F);
+ sprintf(desc, "RegionId=0x%03x", RegionId);
+ printbuf(desc, indent+1, NULL, 0);
+ i += 2;
+ if ((i + Length_FI_list) <= fig0.figlen) {
+ j = i;
+ while ((j + 2) < (i + Length_FI_list)) {
+ // iterate over FI list x
+ // decode Id field, R&M, Continuity flag, Length of Freq list
+ Id_field = (f[j] << 8) | f[j+1];
+ RandM = f[j+2] >> 4;
+ Continuity_flag = (f[j+2] >> 3) & 0x01;
+ Length_Freq_list = f[j+2] & 0x07;
+ sprintf(desc, "Id_field=");
+ switch (RandM) {
+ case 0x0:
+ case 0x1:
+ strcat(desc, "EId");
+ break;
+ case 0x6:
+ strcat(desc, "DRM Service Id");
+ break;
+ case 0x8:
+ strcat(desc, "RDS PI");
+ break;
+ case 0x9:
+ case 0xa:
+ case 0xc:
+ strcat(desc, "Dummy");
+ break;
+ case 0xe:
+ strcat(desc, "AMSS Service Id");
+ break;
+ default:
+ strcat(desc, "invalid");
+ break;
+ }
+ sprintf(tmpbuf, "=0x%X, R&M=0x%1x", Id_field, RandM);
+ strcat(desc, tmpbuf);
+ switch (RandM) {
+ case 0x0:
+ strcat(desc, "=DAB ensemble, no local windows");
+ break;
+ case 0x6:
+ strcat(desc, "=DRM");
+ break;
+ case 0x8:
+ strcat(desc, "=FM with RDS");
+ break;
+ case 0x9:
+ strcat(desc, "=FM without RDS");
+ break;
+ case 0xa:
+ strcat(desc, "=AM (MW in 9 kHz steps & LW)");
+ break;
+ case 0xc:
+ strcat(desc, "=AM (MW in 5 kHz steps & SW)");
+ break;
+ case 0xe:
+ strcat(desc, "=AMSS");
+ break;
+ default:
+ strcat(desc, "=Rfu");
+ break;
+ }
+ sprintf(tmpbuf, ", Continuity flag=%d", Continuity_flag);
+ strcat(desc, tmpbuf);
+ if ((fig0.oe() == 0) || ((fig0.oe() == 1) && (RandM != 0x6) && \
+ ((RandM < 0x8) || (RandM > 0xa)) && (RandM != 0xc) && (RandM != 0xe))) {
+ if (Continuity_flag == 0) {
+ switch (RandM) {
+ case 0x0:
+ case 0x1:
+ strcat(desc, "=continuous output not expected");
+ break;
+ case 0x6:
+ strcat(desc, "=no compensating time delay on DRM audio signal");
+ break;
+ case 0x8:
+ case 0x9:
+ strcat(desc, "=no compensating time delay on FM audio signal");
+ break;
+ case 0xa:
+ case 0xc:
+ case 0xe:
+ strcat(desc, "=no compensating time delay on AM audio signal");
+ break;
+ default:
+ strcat(desc, "=Rfu");
+ break;
+ }
+ }
+ else { // Continuity_flag == 1
+ switch (RandM) {
+ case 0x0:
+ case 0x1:
+ strcat(desc, "=continuous output possible");
+ break;
+ case 0x6:
+ strcat(desc, "=compensating time delay on DRM audio signal");
+ break;
+ case 0x8:
+ case 0x9:
+ strcat(desc, "=compensating time delay on FM audio signal");
+ break;
+ case 0xa:
+ case 0xc:
+ case 0xe:
+ strcat(desc, "=compensating time delay on AM audio signal");
+ break;
+ default:
+ strcat(desc, "=Rfu");
+ break;
+ }
+ }
+ }
+ else { // fig0.oe() == 1
+ strcat(desc, "=reserved for future addition");
+ }
+ key = ((uint64_t)fig0.oe() << 32) | ((uint64_t)fig0.pd() << 31) | \
+ ((uint64_t)RegionId << 20) | ((uint64_t)Id_field << 4) | \
+ (uint64_t)RandM;
+ sprintf(tmpbuf, ", database key=0x%09" PRId64, key);
+ // CEI Change Event Indication
+ if (Length_Freq_list == 0) {
+ strcat(tmpbuf, ", CEI");
+ }
+ strcat(desc, tmpbuf);
+ printbuf(desc, indent+2, NULL, 0);
+ j += 3; // add header
+
+ k = j;
+ switch (RandM) {
+ case 0x0:
+ case 0x1:
+ while((k + 2) < (j + Length_Freq_list)) {
+ // iteration over Freq list
+ ifreq = (((uint32_t)(f[k] & 0x07) << 16) | ((uint32_t)f[k+1] << 8) | (uint32_t)f[k+2]) * 16;
+ if (ifreq != 0) {
+ Control_field = (f[k] >> 3);
+ Control_field_trans_mode = (Control_field >> 1) & 0x07;
+ if ((Control_field & 0x10) == 0) {
+ sprintf(desc, "%d KHz, ", ifreq);
+ if ((Control_field & 0x01) == 0) {
+ strcat(desc, "geographically adjacent area, ");
+ }
+ else { // (Control_field & 0x01) == 1
+ strcat(desc, "no geographically adjacent area, ");
+ }
+ if (Control_field_trans_mode == 0) {
+ strcat(desc, "no transmission mode signalled");
+ }
+ else if (Control_field_trans_mode <= 4) {
+ sprintf(tmpbuf, "transmission mode %d", Control_field_trans_mode);
+ strcat(desc, tmpbuf);
+ }
+ else { // Control_field_trans_mode > 4
+ sprintf(tmpbuf, "invalid transmission mode 0x%x", Control_field_trans_mode);
+ strcat(desc, tmpbuf);
+ }
+ }
+ else { // (Control_field & 0x10) == 0x10
+ sprintf(desc, "%d KHz, invalid Control field b23 0x%x", ifreq, Control_field);
+ }
+ }
+ else {
+ sprintf(desc, "Frequency not to be used (0)");
+ }
+ printbuf(desc, indent+3, NULL, 0);
+ k += 3;
+ }
+ break;
+ case 0x8:
+ case 0x9:
+ case 0xa:
+ while(k < (j + Length_Freq_list)) {
+ // iteration over Freq list
+ if (f[k] != 0) { // freq != 0
+ if (RandM == 0xa) {
+ if (f[k] < 16) {
+ ifreq = (144 + ((uint32_t)f[k] * 9));
+ }
+ else { // f[k] >= 16
+ ifreq = (387 + ((uint32_t)f[k] * 9));
+ }
+ sprintf(desc, "%d KHz", ifreq);
+ }
+ else { // RandM == 8 or 9
+ freq = (87.5 + ((float)f[k] * 0.1));
+ sprintf(desc, "%.1f MHz", freq);
+ }
+ }
+ else {
+ sprintf(desc, "Frequency not to be used (0)");
+ }
+ printbuf(desc, indent+3, NULL, 0);
+ k++;
+ }
+ break;
+ case 0xc:
+ while((k + 1) < (j + Length_Freq_list)) {
+ // iteration over Freq list
+ ifreq = (((uint32_t)f[k] << 8) | (uint32_t)f[k+1]) * 5;
+ if (ifreq != 0) {
+ sprintf(desc, "%d KHz", ifreq);
+ }
+ else {
+ sprintf(desc, "Frequency not to be used (0)");
+ }
+ printbuf(desc, indent+3, NULL, 0);
+ k += 2;
+ }
+ break;
+ case 0x6:
+ case 0xe:
+ while((k + 2) < (j + Length_Freq_list)) {
+ // iteration over Freq list
+ Id_field2 = f[k];
+ ifreq = ((((uint32_t)f[k+1] & 0x7f) << 8) | (uint32_t)f[k+2]);
+ if (ifreq != 0) {
+ sprintf(desc, "%d KHz", ifreq);
+ }
+ else {
+ sprintf(desc, "Frequency not to be used (0)");
+ }
+ if (RandM == 0x6) {
+ sprintf(tmpbuf, ", DRM Service Id 0x%X", Id_field2);
+ strcat(desc, tmpbuf);
+ }
+ else if (RandM == 0xe) {
+ sprintf(tmpbuf, ", AMSS Service Id 0x%X", Id_field2);
+ strcat(desc, tmpbuf);
+ }
+ if ((f[k+1] & 0x80) == 0x80) {
+ sprintf(tmpbuf, ", invalid Rfu b15 set to 1 instead of 0");
+ strcat(desc, tmpbuf);
+ }
+ printbuf(desc, indent+3, NULL, 0);
+ k += 3;
+ }
+ break;
+ default:
+ break;
+ }
+ j += Length_Freq_list;
+ }
+ i += Length_FI_list;
+ }
+ }
+
+ return complete;
+}
+
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