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Diffstat (limited to 'src/fig/FIG0_13.cpp')
| -rw-r--r-- | src/fig/FIG0_13.cpp | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/fig/FIG0_13.cpp b/src/fig/FIG0_13.cpp new file mode 100644 index 0000000..51704f4 --- /dev/null +++ b/src/fig/FIG0_13.cpp @@ -0,0 +1,182 @@ +/* + 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_13.h" +#include "utils.h" + +namespace FIC { + +FIG0_13::FIG0_13(FIGRuntimeInformation *rti) : + m_rti(rti), + m_initialised(false), + m_transmit_programme(false) +{ +} + +FillStatus FIG0_13::fill(uint8_t *buf, size_t max_size) +{ + FillStatus fs; + auto ensemble = m_rti->ensemble; + ssize_t remaining = max_size; + + if (not m_initialised) { + componentFIG0_13 = m_rti->ensemble->components.end(); + m_initialised = true; + } + + FIGtype0* fig0 = NULL; + + for (; componentFIG0_13 != ensemble->components.end(); + ++componentFIG0_13) { + + auto subchannel = getSubchannel(ensemble->subchannels, + (*componentFIG0_13)->subchId); + + if (subchannel == ensemble->subchannels.end()) { + etiLog.log(error, + "Subchannel %i does not exist for component " + "of service %i\n", + (*componentFIG0_13)->subchId, + (*componentFIG0_13)->serviceId); + throw MuxInitException(); + } + + if ( m_transmit_programme && + (*subchannel)->type == subchannel_type_t::Audio && + (*componentFIG0_13)->audio.uaType != 0xffff) { + + const int required_size = 3+4+11; + + 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 = 0; + fig0->Extension = 13; + buf += 2; + remaining -= 2; + } + else if (remaining < required_size) { + break; + } + + FIG0_13_shortAppInfo* info = (FIG0_13_shortAppInfo*)buf; + info->SId = htonl((*componentFIG0_13)->serviceId) >> 16; + info->SCIdS = (*componentFIG0_13)->SCIdS; + info->No = 1; + buf += 3; + remaining -= 3; + fig0->Length += 3; + + FIG0_13_app* app = (FIG0_13_app*)buf; + app->setType((*componentFIG0_13)->audio.uaType); + app->length = 2; + app->xpad = htons(0x0c3c); + /* xpad meaning + CA = 0 + CAOrg = 0 + Rfu = 0 + AppTy(5) = 12 (MOT, start of X-PAD data group) + DG = 0 (MSC data groups used) + Rfu = 0 + DSCTy(6) = 60 (MOT) + */ + + buf += 2 + app->length; + remaining -= 2 + app->length; + fig0->Length += 2 + app->length; + } + else if (!m_transmit_programme && + (*subchannel)->type == subchannel_type_t::Packet && + (*componentFIG0_13)->packet.appType != 0xffff) { + + const int required_size = 5+2+2; + + 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 = 1; + fig0->Extension = 13; + buf += 2; + remaining -= 2; + } + else if (remaining < required_size) { + break; + } + + FIG0_13_longAppInfo* info = (FIG0_13_longAppInfo*)buf; + info->SId = htonl((*componentFIG0_13)->serviceId); + info->SCIdS = (*componentFIG0_13)->SCIdS; + info->No = 1; + buf += 5; + remaining -= 5; + fig0->Length += 5; + + FIG0_13_app* app = (FIG0_13_app*)buf; + app->setType((*componentFIG0_13)->packet.appType); + if (app->typeLow == FIG0_13_APPTYPE_EPG) { + app->length = 2; + app->xpad = htons(0x0100); + /* xpad used to hold two bytes of EPG profile information + 01 = basic profile + 00 = list terminator */ + } + else { + app->length = 0; + } + buf += 2 + app->length; + remaining -= 2 + app->length; + fig0->Length += 2 + app->length; + } + } + + if (componentFIG0_13 == ensemble->components.end()) { + componentFIG0_13 = ensemble->components.begin(); + + // The full database is sent every second full loop + fs.complete_fig_transmitted = m_transmit_programme; + + m_transmit_programme = not m_transmit_programme; + // Alternate between data and and programme FIG0/13, + // do not mix fig0 with PD=0 with extension 13 stuff + // that actually needs PD=1, and vice versa + } + + fs.num_bytes_written = max_size - remaining; + return fs; +} + +} |