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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 <unordered_set>
static std::unordered_set<int> components_ids_seen;
bool fig0_3_is_complete(int components_id)
{
bool complete = components_ids_seen.count(components_id);
if (complete) {
components_ids_seen.clear();
}
else {
components_ids_seen.insert(components_id);
}
return complete;
}
// FIG 0/3 Service component in packet mode with or without Conditional Access
// ETSI EN 300 401 6.3.2
fig_result_t fig0_3(fig0_common_t& fig0, const display_settings_t &disp)
{
uint16_t SCId, Packet_address, CAOrg;
uint8_t i = 1, Rfa, DSCTy, SubChId, CAMode, SharedFlag;
fig_result_t r;
bool CAOrg_flag, DG_flag, Rfu;
uint8_t* f = fig0.f;
while (i < fig0.figlen - 4) {
// iterate over service component in packet mode
SCId = ((uint16_t)f[i] << 4) | ((uint16_t)(f[i+1] >> 4) & 0x0F);
r.complete |= fig0_3_is_complete(SCId);
Rfa = (f[i+1] >> 1) & 0x07;
CAOrg_flag = f[i+1] & 0x01;
DG_flag = (f[i+2] >> 7) & 0x01;
Rfu = (f[i+2] >> 6) & 0x01;
DSCTy = f[i+2] & 0x3F;
SubChId = (f[i+3] >> 2);
Packet_address = ((uint16_t)(f[i+3] & 0x03) << 8) | ((uint16_t)f[i+4]);
r.msgs.emplace_back("-");
r.msgs.emplace_back(1, strprintf("SCId=0x%X", SCId));
r.msgs.emplace_back(1, strprintf("CAOrg flag=%d CAOrg field %s", CAOrg_flag, CAOrg_flag?"present":"absent"));
r.msgs.emplace_back(1, strprintf("DG flag=%d", DG_flag));
r.msgs.emplace_back(1, strprintf("data groups are %sused to transport the service component", DG_flag ? "not ": ""));
r.msgs.emplace_back(1, strprintf("DSCTy=%d %s", DSCTy, get_dscty_type(DSCTy)));
r.msgs.emplace_back(1, strprintf("SubChId=0x%X", SubChId));
r.msgs.emplace_back(1, strprintf("Packet address=0x%X", Packet_address));
if (Rfa != 0) {
r.errors.push_back(strprintf("Rfa=%d invalid value", Rfa));
}
if (Rfu != 0) {
r.errors.push_back(strprintf("Rfu=%d invalid value", Rfu));
}
i += 5;
if (CAOrg_flag) {
if (i < fig0.figlen - 1) {
CAOrg = ((uint16_t)f[i] << 8) | ((uint16_t)f[i+1]);
CAMode = (f[i] >> 5);
SharedFlag = f[i+1];
r.msgs.emplace_back(1, strprintf("CAOrg=0x%X CAMode=%d \"%s\" SharedFlag=0x%X%s",
CAOrg, CAMode, get_ca_mode(CAMode), SharedFlag, (SharedFlag == 0) ? " invalid" : ""));
}
else {
r.errors.push_back("Invalid figlen");
}
i += 2;
}
}
return r;
}
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