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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 <unordered_set>
static std::unordered_set<int> subchannels_seen;
bool fig0_1_is_complete(int subch_id)
{
bool complete = subchannels_seen.count(subch_id);
if (complete) {
subchannels_seen.clear();
}
else {
subchannels_seen.insert(subch_id);
}
return complete;
}
// FIG 0/1 Basic sub-channel organization
// ETSI EN 300 401 6.2.1
fig_result_t fig0_1(fig0_common_t& fig0, const display_settings_t &disp)
{
int i = 1;
uint8_t* f = fig0.f;
fig_result_t r;
while (i <= fig0.figlen-3) {
// iterate over subchannels
int subch_id = f[i] >> 2;
r.complete |= fig0_1_is_complete(subch_id);
int start_addr = ((f[i] & 0x03) << 8) |
(f[i+1]);
int long_flag = (f[i+2] >> 7);
if (fig0.fibcrccorrect) {
auto& subch = fig0.ensemble.get_or_create_subchannel(subch_id);
subch.id = subch_id;
subch.start_addr = start_addr;
subch.protection_type = long_flag ?
ensemble_database::subchannel_t::protection_type_t::EEP :
ensemble_database::subchannel_t::protection_type_t::UEP;
}
if (long_flag) {
int option = (f[i+2] >> 4) & 0x07;
int protection_level = (f[i+2] >> 2) & 0x03;
int subchannel_size = ((f[i+2] & 0x03) << 8 ) |
f[i+3];
i += 4;
r.msgs.push_back(strprintf("Subch 0x%x", subch_id));
r.msgs.push_back(strprintf("start_addr %d", start_addr));
r.msgs.emplace_back("long");
if (option == 0x00) {
r.msgs.push_back(strprintf("EEP %d-A", protection_level+1));
}
else if (option == 0x01) {
r.msgs.push_back(strprintf("EEP %d-B", protection_level+1));
}
else {
r.errors.push_back(strprintf("Invalid option %d protection %d", option, protection_level));
}
r.msgs.push_back(strprintf("subch size %d", subchannel_size));
if (fig0.fibcrccorrect) {
auto& subch = fig0.ensemble.get_subchannel(subch_id);
subch.protection_option = option;
subch.protection_level = protection_level;
subch.size = subchannel_size;
}
}
else {
int table_switch = (f[i+2] >> 6) & 0x01;
uint32_t table_index = (f[i+2] & 0x3F);
r.msgs.push_back(strprintf("Subch 0x%x", subch_id));
r.msgs.push_back(strprintf("start_addr %d", start_addr));
r.msgs.emplace_back("short");
if (table_switch != 0) {
r.errors.push_back(strprintf("Invalid table_switch %d", table_switch));
}
r.msgs.push_back(strprintf("table index %d", table_index));
if (fig0.fibcrccorrect) {
auto& subch = fig0.ensemble.get_subchannel(subch_id);
subch.table_switch = table_switch;
subch.table_index = table_index;
}
i += 3;
}
}
return r;
}
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