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authorMatthias P. Braendli <matthias.braendli@mpb.li>2018-07-31 11:51:23 +0200
committerMatthias P. Braendli <matthias.braendli@mpb.li>2018-07-31 11:51:23 +0200
commit203b42f0b5a7ed53442b9e0a0072dec48b7f5eb6 (patch)
treefdb5228a3b7a2f2893aba846bb59c9f68a2f6a80 /src/fig/FIG0_9.cpp
parentb6f7c8123810ca8394f8658de14bf0e67a2557eb (diff)
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Add support for services with different ECC in FIG0/9
Diffstat (limited to 'src/fig/FIG0_9.cpp')
-rw-r--r--src/fig/FIG0_9.cpp108
1 files changed, 103 insertions, 5 deletions
diff --git a/src/fig/FIG0_9.cpp b/src/fig/FIG0_9.cpp
index 06f2125..cf73625 100644
--- a/src/fig/FIG0_9.cpp
+++ b/src/fig/FIG0_9.cpp
@@ -3,7 +3,7 @@
2011, 2012 Her Majesty the Queen in Right of Canada (Communications
Research Center Canada)
- Copyright (C) 2016
+ Copyright (C) 2018
Matthias P. Braendli, matthias.braendli@mpb.li
*/
/*
@@ -26,6 +26,9 @@
#include "fig/FIG0structs.h"
#include "fig/FIG0_9.h"
#include "utils.h"
+#include <map>
+
+using namespace std;
namespace FIC {
@@ -44,6 +47,14 @@ struct FIGtype0_9 {
uint8_t tableId;
} PACKED;
+struct FIGtype0_9_Subfield {
+ uint8_t Rfa2:6;
+ uint8_t NumServices:2;
+
+ uint8_t ecc;
+ // Followed by list of NumServices uint16_t SIDs
+} PACKED;
+
FIG0_9::FIG0_9(FIGRuntimeInformation *rti) :
m_rti(rti) {}
@@ -53,7 +64,64 @@ FillStatus FIG0_9::fill(uint8_t *buf, size_t max_size)
auto ensemble = m_rti->ensemble;
size_t remaining = max_size;
- if (remaining < 5) {
+ if (m_extended_fields.empty()) {
+ map<uint8_t, list<uint16_t> > ecc_to_services;
+ for (const auto& srv : ensemble->services) {
+ if (srv->ecc != 0 and srv->ecc != ensemble->ecc and
+ srv->isProgramme(ensemble)) {
+ if (srv->id > 0xFFFF) {
+ throw std::logic_error(
+ "Service ID for programme service > 0xFFFF");
+ }
+ ecc_to_services[srv->ecc].push_back(srv->id);
+ }
+ }
+
+ // Reorganise the data so that it fits into the
+ // extended field. Max 3 SIds per sub-field.
+ for (auto& ecc_sids_pair : ecc_to_services) {
+ FIG0_9_Extended_Field ef;
+ ef.ecc = ecc_sids_pair.first;
+
+ size_t i = 0;
+ for (auto& sid : ecc_sids_pair.second) {
+ if (i == 3) {
+ m_extended_fields.push_back(ef);
+ ef.sids.clear();
+ i = 0;
+ }
+
+ ef.sids.push_back(sid);
+ i++;
+ }
+
+ if (not ef.sids.empty()) {
+ m_extended_fields.push_back(ef);
+ }
+ }
+ m_current_extended_field = m_extended_fields.begin();
+
+ for (const auto& ef : m_extended_fields) {
+ stringstream ss;
+ ss << "FIG0_9 Ext ECC 0x" << hex << (int)ef.ecc << dec << ":";
+
+ for (auto& sid : ef.sids) {
+ ss << " " << hex << (int)sid << dec;
+ }
+ ss << ".";
+ etiLog.level(debug) << ss.str();
+ }
+ }
+
+ size_t required = 5;
+
+ // If we have services with different ECC, avoid transmitting a
+ // FIG0/9 without any extended field.
+ if (m_current_extended_field != m_extended_fields.end()) {
+ required += 2 + 2 * m_current_extended_field->sids.size();
+ }
+
+ if (remaining < required) {
fs.num_bytes_written = 0;
return fs;
}
@@ -66,7 +134,7 @@ FillStatus FIG0_9::fill(uint8_t *buf, size_t max_size)
fig0_9->PD = 0;
fig0_9->Extension = 9;
- fig0_9->ext = 0;
+ fig0_9->ext = m_extended_fields.empty() ? 0 : 1;
fig0_9->rfa1 = 0; // Had a different meaning in EN 300 401 V1.4.1
if (ensemble->lto_auto) {
@@ -89,10 +157,40 @@ FillStatus FIG0_9::fill(uint8_t *buf, size_t max_size)
buf += 5;
remaining -= 5;
- /* No extended field, no support for services with different ECC */
+ while (m_current_extended_field != m_extended_fields.end() and
+ remaining > m_current_extended_field->required_bytes()) {
+ if (m_current_extended_field->sids.size() > 3) {
+ throw logic_error("Wrong FIG0/9 subfield generation");
+ }
+
+ auto subfield = (FIGtype0_9_Subfield*)buf;
+ subfield->NumServices = m_current_extended_field->sids.size();
+ subfield->Rfa2 = 0;
+ subfield->ecc = m_current_extended_field->ecc;
+ buf += 2;
+ fig0_9->Length += 2;
+ remaining -= 2;
+
+ for (uint16_t sid : m_current_extended_field->sids) {
+ uint16_t *sid_field = (uint16_t*)buf;
+ *sid_field = htons(sid);
+ buf += 2;
+ fig0_9->Length += 2;
+ remaining -= 2;
+ }
+
+ ++m_current_extended_field;
+ }
fs.num_bytes_written = max_size - remaining;
- fs.complete_fig_transmitted = true;
+
+ if (m_current_extended_field == m_extended_fields.end()) {
+ fs.complete_fig_transmitted = true;
+ m_current_extended_field = m_extended_fields.begin();
+ }
+ else {
+ fs.complete_fig_transmitted = false;
+ }
return fs;
}