diff options
Diffstat (limited to 'src/fig/FIG0_6.cpp')
| -rw-r--r-- | src/fig/FIG0_6.cpp | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/src/fig/FIG0_6.cpp b/src/fig/FIG0_6.cpp new file mode 100644 index 0000000..f404a47 --- /dev/null +++ b/src/fig/FIG0_6.cpp @@ -0,0 +1,204 @@ +/* + Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, + 2011, 2012 Her Majesty the Queen in Right of Canada (Communications + Research Center Canada) + + Copyright (C) 2016 + Matthias P. Braendli, matthias.braendli@mpb.li + */ +/* + This file is part of ODR-DabMux. + + ODR-DabMux 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. + + ODR-DabMux 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 ODR-DabMux. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "fig/FIG0_6.h" +#include "utils.h" + +namespace FIC { + +FIG0_6::FIG0_6(FIGRuntimeInformation *rti) : + m_rti(rti), + m_initialised(false) +{ +} + +FillStatus FIG0_6::fill(uint8_t *buf, size_t max_size) +{ + FillStatus fs; + ssize_t remaining = max_size; + auto ensemble = m_rti->ensemble; + + if (not m_initialised) { + linkageSetFIG0_6 = m_rti->ensemble->linkagesets.end(); + m_initialised = true; + } + + FIGtype0* fig0 = NULL; + + for (; linkageSetFIG0_6 != ensemble->linkagesets.end(); + ++linkageSetFIG0_6) { + + const bool PD = false; + const bool ILS = (*linkageSetFIG0_6)->international; + + // need to add key service to num_ids + const size_t num_ids = 1 + (*linkageSetFIG0_6)->id_list.size(); + + const size_t headersize = sizeof(struct FIGtype0_6_header); + const int required_size = sizeof(struct FIGtype0_6) + + (num_ids > 0 ? + headersize + (PD == 0 ? (ILS == 0 ? 2*num_ids : 3*num_ids) : 4*num_ids) : + 0); + + if (fig0 == NULL) { + if (remaining < 2 + required_size) { + break; + } + fig0 = (FIGtype0*)buf; + fig0->FIGtypeNumber = 0; + fig0->Length = 1; + fig0->CN = 0; + fig0->OE = 0; + fig0->PD = PD; + fig0->Extension = 5; + + buf += 2; + remaining -= 2; + } + else if (remaining < required_size) { + break; + } + + FIGtype0_6 *fig0_6 = (FIGtype0_6*)buf; + + fig0_6->IdListFlag = (num_ids > 0); + fig0_6->LA = (*linkageSetFIG0_6)->active; + fig0_6->SH = (*linkageSetFIG0_6)->hard; + fig0_6->ILS = ILS; + fig0_6->LSN = (*linkageSetFIG0_6)->lsn; + + fig0->Length += sizeof(struct FIGtype0_6); + buf += sizeof(struct FIGtype0_6); + remaining -= sizeof(struct FIGtype0_6); + + if (num_ids > 0) { + FIGtype0_6_header *header = (FIGtype0_6_header*)buf; + header->rfu = 0; + if (num_ids > 0x0F) { + etiLog.log(error, "Too large number of links for linkage set 0x%04x", + (*linkageSetFIG0_6)->lsn); + throw MuxInitException(); + } + + header->IdLQ = 0; // TODO not only DAB + header->rfa = 0; + header->num_ids = num_ids; + + fig0->Length += headersize; + buf += headersize; + remaining -= headersize; + + // TODO insert key service first + const std::string keyserviceuid =(*linkageSetFIG0_6)->keyservice; + const auto& keyservice = std::find_if( + ensemble->services.begin(), + ensemble->services.end(), + [&](const std::shared_ptr<DabService> srv) { + return srv->uid == keyserviceuid; + }); + + if (keyservice == ensemble->services.end()) { + etiLog.log(error, "Invalid key service %s in linkage set 0x%04x", + keyserviceuid.c_str(), (*linkageSetFIG0_6)->lsn); + throw MuxInitException(); + } + for (const auto& l : (*linkageSetFIG0_6)->id_list) { + if (l.type != ServiceLinkType::DAB) { + etiLog.log(error, "TODO only DAB links supported. (linkage set 0x%04x)", + (*linkageSetFIG0_6)->lsn); + throw MuxInitException(); + } + } + + if (not PD and not ILS) { + buf[0] = (*keyservice)->id >> 8; + buf[1] = (*keyservice)->id & 0xFF; + fig0->Length += 2; + buf += 2; + remaining -= 2; + + for (const auto& l : (*linkageSetFIG0_6)->id_list) { + buf[0] = l.id >> 8; + buf[1] = l.id & 0xFF; + fig0->Length += 2; + buf += 2; + remaining -= 2; + } + } + if (not PD and ILS) { + buf[0] = ensemble->ecc; + buf[1] = (*keyservice)->id >> 8; + buf[2] = (*keyservice)->id & 0xFF; + fig0->Length += 3; + buf += 3; + remaining -= 3; + + for (const auto& l : (*linkageSetFIG0_6)->id_list) { + buf[0] = l.ecc; + buf[1] = l.id >> 8; + buf[2] = l.id & 0xFF; + fig0->Length += 3; + buf += 3; + remaining -= 3; + } + } + else { // PD == true + // TODO if IdLQ is 11, MSB shall be zero + buf[0] = (*keyservice)->id >> 24; + buf[1] = (*keyservice)->id >> 16; + buf[2] = (*keyservice)->id >> 8; + buf[3] = (*keyservice)->id & 0xFF; + fig0->Length += 4; + buf += 4; + remaining -= 4; + + for (const auto& l : (*linkageSetFIG0_6)->id_list) { + buf[0] = l.id >> 24; + buf[1] = l.id >> 16; + buf[2] = l.id >> 8; + buf[3] = l.id & 0xFF; + fig0->Length += 4; + buf += 4; + remaining -= 4; + } + } + } + + fig0->Length += required_size; + buf += required_size; + remaining -= required_size; + } + + if (linkageSetFIG0_6 == ensemble->linkagesets.end()) { + linkageSetFIG0_6 = ensemble->linkagesets.begin(); + fs.complete_fig_transmitted = true; + } + + fs.num_bytes_written = max_size - remaining; + return fs; +} + +} + |