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/*
Copyright (C) 2014 CSP Innovazione nelle ICT s.c.a r.l. (http://www.csp.it/)
Copyright (C) 2020 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, 8.1.20, User application information
* 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_ids_seen;
bool fig0_13_is_complete(SId_t SId, SCIdS_t SCIdS)
{
auto key = std::make_pair(SId, SCIdS);
bool complete = components_ids_seen.count(key);
if (complete) {
components_ids_seen.clear();
}
components_ids_seen.insert(key);
return complete;
}
std::string get_fig_0_13_userapp(int user_app_type)
{
switch (user_app_type) {
case 0x000: return "Reserved for future definition";
case 0x001: return "Not used";
case 0x002: return "MOT Slideshow";
case 0x003: return "MOT Broadacst Web Site";
case 0x004: return "TPEG";
case 0x005: return "DGPS";
case 0x006: return "TMC";
case 0x007: return "EPG";
case 0x008: return "DAB Java";
case 0x44a: return "Journaline";
default: return "Reserved for future applications";
}
}
// FIG 0/13 User application information
// ETSI EN 300 401 8.1.20
fig_result_t fig0_13(fig0_common_t& fig0, const display_settings_t &disp)
{
uint32_t SId;
uint8_t SCIdS;
uint8_t No;
uint8_t* f = fig0.f;
fig_result_t r;
bool complete = false;
int k = 1;
if (fig0.pd() == 0) { // Programme services, 16 bit SId
SId = (f[k] << 8) |
f[k+1];
k+=2;
SCIdS = f[k] >> 4;
No = f[k] & 0x0F;
k++;
}
else { // Data services, 32 bit SId
SId = (f[k] << 24) |
(f[k+1] << 16) |
(f[k+2] << 8) |
f[k+3];
k+=4;
SCIdS = f[k] >> 4;
No = f[k] & 0x0F;
k++;
}
complete |= fig0_13_is_complete(SId, SCIdS);
r.msgs.emplace_back(strprintf("SId=0x%X", SId));
r.msgs.emplace_back(strprintf("SCIdS=%u", SCIdS));
r.msgs.emplace_back(strprintf("User applications(%d):", No));
for (int numapp = 0; numapp < No; numapp++) {
uint16_t user_app_type = ((f[k] << 8) |
(f[k+1] & 0xE0)) >> 5;
uint8_t user_app_len = f[k+1] & 0x1F;
k += 2;
r.msgs.emplace_back(1, "-");
r.msgs.emplace_back(2, strprintf("User Application=%d '%s'",
user_app_type,
get_fig_0_13_userapp(user_app_type).c_str()));
r.msgs.emplace_back(2, strprintf("length=%u", user_app_len));
if (user_app_len >= 2) {
size_t effective_uadata_len = user_app_len;
if (fig0.pd() == 0) { // Programme services contain the X-PAD data field
bool ca_flag = (f[k] >> 7) & 0x1;
r.msgs.emplace_back(2, strprintf("CAflag=%d", ca_flag));
bool ca_org_flag = (f[k] >> 6) & 0x1;
r.msgs.emplace_back(2, strprintf("CAOrgflag=%d", ca_org_flag));
uint8_t xpad_appty = f[k] & 0x1F;
r.msgs.emplace_back(2, strprintf("XPAD_AppTy=%d", xpad_appty));
bool dg_flag = (f[k+1] >> 7) & 0x1;
r.msgs.emplace_back(2, strprintf("DGflag=%d", dg_flag));
uint8_t dscty = f[k+1] & 0x3F;
r.msgs.emplace_back(2, strprintf("DSCTy=%d", dscty));
k += 2;
effective_uadata_len -= 2;
if (ca_org_flag) {
if (user_app_len < 4) {
r.errors.push_back("User Application Data Length too short to contain CAOrg!");
}
else {
uint16_t ca_org = (f[k] << 8) | f[k+1];
k += 2;
effective_uadata_len -= 2;
r.msgs.emplace_back(2, strprintf("ca_org=%u", ca_org));
}
}
}
std::string ua_data = "UA Data=[";
for (size_t i = 0; i < effective_uadata_len; i++) {
ua_data += strprintf("0x%02x", f[k + i]);
if (i + 1 < effective_uadata_len) {
ua_data += ", ";
}
}
ua_data += "]";
r.msgs.emplace_back(2, move(ua_data));
}
}
r.complete = complete;
return r;
}
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