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/*
Copyright (C) 2014 CSP Innovazione nelle ICT s.c.a r.l. (http://www.csp.it/)
Copyright (C) 2017 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 <set>
/* EN 300 401, 8.1.14.3 Service component label
* The combination of the SId and the SCIdS provides a service component
* identifier which is valid globally.
*/
using SId_t = int;
using SCIdS_t = int;
static std::set<std::pair<SId_t, SCIdS_t> > components_seen;
bool fig0_8_is_complete(SId_t SId, SCIdS_t SCIdS)
{
auto key = std::make_pair(SId, SCIdS);
bool complete = components_seen.count(key);
if (complete) {
components_seen.clear();
}
else {
components_seen.insert(key);
}
return complete;
}
// FIG 0/8 Service component global definition
// ETSI EN 300 401 6.3.5
fig_result_t fig0_8(fig0_common_t& fig0, const display_settings_t &disp)
{
uint32_t SId;
uint16_t SCId;
uint8_t i = 1, Rfa, SCIdS, SubChId, FIDCId;
fig_result_t r;
bool Ext_flag, LS_flag, MSC_FIC_flag;
uint8_t* f = fig0.f;
while (i < (fig0.figlen - (2 + (2 * fig0.pd())))) {
// iterate over service component global definition
if (fig0.pd() == 0) {
// Programme services, 16 bit SId
SId = (f[i] << 8) | f[i+1];
i += 2;
}
else {
// Data services, 32 bit SId
SId = ((uint32_t)f[i] << 24) | ((uint32_t)f[i+1] << 16) |
((uint32_t)f[i+2] << 8) | (uint32_t)f[i+3];
i += 4;
}
Ext_flag = f[i] >> 7;
Rfa = (f[i] >> 4) & 0x7;
SCIdS = f[i] & 0x0F;
r.complete |= fig0_8_is_complete(SId, SCIdS);
r.msgs.push_back(strprintf("SId=0x%X", SId));
r.msgs.push_back(strprintf("Ext flag=%d 8-bit Rfa %s",
Ext_flag, (Ext_flag)?"present":"absent"));
if (Rfa != 0) {
r.errors.push_back(strprintf("Rfa=%d invalid value", Rfa));
}
r.msgs.push_back(strprintf("SCIdS=0x%X", SCIdS));
i++;
if (i < fig0.figlen) {
LS_flag = f[i] >> 7;
r.msgs.push_back(strprintf("L/S flag=%d %s", LS_flag, (LS_flag)?"Long form":"Short form"));
if (LS_flag == 0) {
// Short form
if (i < (fig0.figlen - Ext_flag)) {
MSC_FIC_flag = (f[i] >> 6) & 0x01;
if (MSC_FIC_flag == 0) {
// MSC in stream mode and SubChId identifies the sub-channel
SubChId = f[i] & 0x3F;
r.msgs.push_back(strprintf("MSC/FIC flag=%d MSC, SubChId=0x%X", MSC_FIC_flag, SubChId));
}
else {
// FIC and FIDCId identifies the component
FIDCId = f[i] & 0x3F;
r.msgs.push_back(strprintf("MSC/FIC flag=%d FIC, FIDCId=0x%X", MSC_FIC_flag, FIDCId));
}
if (Ext_flag == 1) {
// Rfa field present
Rfa = f[i+1];
if (Rfa != 0) {
r.errors.push_back(strprintf("Rfa=0x%X invalid value", Rfa));
}
}
}
i += (1 + Ext_flag);
}
else {
// Long form
if (i < (fig0.figlen - 1)) {
Rfa = (f[i] >> 4) & 0x07;
SCId = (((uint16_t)f[i] & 0x0F) << 8) | (uint16_t)f[i+1];
if (Rfa != 0) {
r.errors.push_back(strprintf("Rfa=%d invalid value", Rfa));
}
r.msgs.push_back(strprintf("SCId=0x%X", SCId));
}
i += 2;
}
}
}
return r;
}
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