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/*
Copyright (C) 2014 CSP Innovazione nelle ICT s.c.a r.l. (http://www.csp.it/)
Copyright (C) 2018 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> clusters_seen;
bool fig0_19_is_complete(int clusters_id)
{
bool complete = clusters_seen.count(clusters_id);
if (complete) {
clusters_seen.clear();
}
else {
clusters_seen.insert(clusters_id);
}
return complete;
}
// FIG 0/19 Announcement switching
// ETSI EN 300 401 8.1.6.2
fig_result_t fig0_19(fig0_common_t& fig0, const display_settings_t &disp)
{
uint16_t Asw_flags;
uint8_t i = 1, j, Cluster_Id, SubChId, Rfa, RegionId_LP;
fig_result_t r;
bool New_flag, Region_flag;
uint8_t* f = fig0.f;
while (i < (fig0.figlen - 3)) {
// iterate over announcement switching
// Cluster Id, Asw flags, New flag, Region flag,
// SubChId, Rfa, Region Id Lower Part
Cluster_Id = f[i];
r.complete |= fig0_19_is_complete(Cluster_Id);
Asw_flags = ((uint16_t)f[i+1] << 8) | (uint16_t)f[i+2];
New_flag = (f[i+3] >> 7);
Region_flag = (f[i+3] >> 6) & 0x1;
SubChId = (f[i+3] & 0x3F);
r.msgs.emplace_back("-");
r.msgs.emplace_back(1, strprintf("Cluster Id=0x%02x", Cluster_Id));
r.msgs.emplace_back(1, strprintf("Asw flags=0x%04x", Asw_flags));
r.msgs.emplace_back(1, strprintf("New flag=%d %s", New_flag, (New_flag)?"new":"repeat"));
r.msgs.emplace_back(1, strprintf("Region flag=%d last byte %s", Region_flag, (Region_flag)?"present":"absent"));
r.msgs.emplace_back(1, strprintf("SubChId=%d", SubChId));
if (Region_flag) {
if (i < (fig0.figlen - 4)) {
// read region lower part
Rfa = (f[i+4] >> 6);
RegionId_LP = (f[i+4] & 0x3F);
if (Rfa != 0) {
r.errors.push_back(strprintf("Rfa=%d invalid value", Rfa));
}
r.msgs.emplace_back(1, strprintf("Region Lower Part=0x%02x", RegionId_LP));
}
else {
r.errors.push_back("missing Region Lower Part, fig length too short !");
}
}
// decode announcement switching types
r.msgs.emplace_back(1, strprintf("Announcement switching:"));
for(j = 0; j < 16; j++) {
if (Asw_flags & (1 << j)) {
r.msgs.emplace_back(2, strprintf("- %s", get_announcement_type(j)));
}
}
i += (4 + Region_flag);
}
return r;
}
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