/* * nit.c: NIT section filter * * See the main source file 'vdr.c' for copyright information and * how to reach the author. * * $Id: nit.c 4.9.1.1 2021/12/27 11:09:16 kls Exp $ */ #include "nit.h" #include #include "channels.h" #include "dvbdevice.h" #include "eitscan.h" #include "libsi/section.h" #include "libsi/descriptor.h" #include "tools.h" #define DVB_SYSTEM_1 0 // see also dvbdevice.c #define DVB_SYSTEM_2 1 #define MAXNETWORKNAME Utf8BufSize(256) // Set to 'true' for debug output: static bool DebugNit = false; #define dbgnit(a...) if (DebugNit) fprintf(stderr, a) cNitFilter::cNitFilter(cSdtFilter *SdtFilter) { sdtFilter = SdtFilter; Set(0x10, SI::TableIdNIT); } void cNitFilter::SetStatus(bool On) { cFilter::SetStatus(On); sectionSyncer.Reset(); } void cNitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length) { SI::NIT nit(Data, false); if (!nit.CheckCRCAndParse()) return; if (!sectionSyncer.Sync(nit.getVersionNumber(), nit.getSectionNumber(), nit.getLastSectionNumber())) return; if (DebugNit) { char NetworkName[MAXNETWORKNAME] = ""; SI::Descriptor *d; for (SI::Loop::Iterator it; (d = nit.commonDescriptors.getNext(it)); ) { switch (d->getDescriptorTag()) { case SI::NetworkNameDescriptorTag: { SI::NetworkNameDescriptor *nnd = (SI::NetworkNameDescriptor *)d; nnd->name.getText(NetworkName, MAXNETWORKNAME); } break; default: ; } delete d; } dbgnit("NIT: %02X %2d %2d %2d %s %d %d '%s'\n", Tid, nit.getVersionNumber(), nit.getSectionNumber(), nit.getLastSectionNumber(), *cSource::ToString(Source()), nit.getNetworkId(), Transponder(), NetworkName); } cStateKey StateKey; cChannels *Channels = cChannels::GetChannelsWrite(StateKey, 10); if (!Channels) { sectionSyncer.Repeat(); // let's not miss any section of the NIT return; } bool ChannelsModified = false; SI::NIT::TransportStream ts; for (SI::Loop::Iterator it; nit.transportStreamLoop.getNext(ts, it); ) { SI::Descriptor *d; SI::Loop::Iterator it2; SI::FrequencyListDescriptor *fld = (SI::FrequencyListDescriptor *)ts.transportStreamDescriptors.getNext(it2, SI::FrequencyListDescriptorTag); int NumFrequencies = fld ? fld->frequencies.getCount() + 1 : 1; int Frequencies[NumFrequencies]; if (fld) { int ct = fld->getCodingType(); if (ct > 0) { int n = 1; for (SI::Loop::Iterator it3; fld->frequencies.hasNext(it3); ) { int f = fld->frequencies.getNext(it3); switch (ct) { case 1: f = BCD2INT(f) / 100; break; case 2: f = BCD2INT(f) / 10; break; case 3: f = f * 10; break; default: ; } Frequencies[n++] = f; dbgnit(" Frequencies[%d] = %d\n", n - 1, f); } } else NumFrequencies = 1; } delete fld; // Necessary for "backwards compatibility mode" according to ETSI EN 300 468: bool ForceDVBS2 = false; for (SI::Loop::Iterator it2; (d = ts.transportStreamDescriptors.getNext(it2)); ) { if (d->getDescriptorTag() == SI::S2SatelliteDeliverySystemDescriptorTag) { ForceDVBS2 = true; delete d; break; } delete d; } for (SI::Loop::Iterator it2; (d = ts.transportStreamDescriptors.getNext(it2)); ) { switch (d->getDescriptorTag()) { case SI::SatelliteDeliverySystemDescriptorTag: { SI::SatelliteDeliverySystemDescriptor *sd = (SI::SatelliteDeliverySystemDescriptor *)d; cDvbTransponderParameters dtp; int Source = cSource::FromData(cSource::stSat, BCD2INT(sd->getOrbitalPosition()), sd->getWestEastFlag()); int Frequency = Frequencies[0] = BCD2INT(sd->getFrequency()) / 100; static char Polarizations[] = { 'H', 'V', 'L', 'R' }; dtp.SetPolarization(Polarizations[sd->getPolarization()]); static int CodeRates[] = { FEC_NONE, FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_8_9, FEC_3_5, FEC_4_5, FEC_9_10, FEC_AUTO, FEC_AUTO, FEC_AUTO, FEC_AUTO, FEC_AUTO, FEC_NONE }; dtp.SetCoderateH(CodeRates[sd->getFecInner()]); static int Modulations[] = { QAM_AUTO, QPSK, PSK_8, QAM_16 }; dtp.SetModulation(Modulations[sd->getModulationType()]); bool System = sd->getModulationSystem() || ForceDVBS2; dtp.SetSystem(System ? DVB_SYSTEM_2 : DVB_SYSTEM_1); static int RollOffs[] = { ROLLOFF_35, ROLLOFF_25, ROLLOFF_20, ROLLOFF_AUTO }; dtp.SetRollOff(System ? RollOffs[sd->getRollOff()] : ROLLOFF_AUTO); int SymbolRate = BCD2INT(sd->getSymbolRate()) / 10; dbgnit(" %s %d %c %d %d DVB-S%d\n", *cSource::ToString(Source), Frequency, dtp.Polarization(), SymbolRate, cChannel::Transponder(Frequency, dtp.Polarization()), System ? 2 : 1); if (Setup.UpdateChannels >= 5) { bool found = false; bool forceTransponderUpdate = false; for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) { if (!Channel->GroupSep() && Channel->Source() == Source && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) { // Preserve parameters set separately in S2SatelliteDeliverySystemDescriptor: cDvbTransponderParameters dtpc(Channel->Parameters()); dtp.SetStreamId(dtpc.StreamId()); // int transponder = Channel->Transponder(); if (!ISTRANSPONDER(cChannel::Transponder(Frequency, dtp.Polarization()), transponder)) { for (int n = 0; n < NumFrequencies; n++) { if (ISTRANSPONDER(cChannel::Transponder(Frequencies[n], dtp.Polarization()), transponder)) { Frequency = Frequencies[n]; break; } } } if (!ISTRANSPONDER(cChannel::Transponder(Frequency, dtp.Polarization()), transponder)) continue; // a channel with obsolete/wrong/other(?) transponder found = true; if (ISTRANSPONDER(transponder, Transponder())) // only modify channels if we're actually receiving this transponder ChannelsModified |= Channel->SetTransponderData(Source, Frequency, SymbolRate, dtp.ToString('S')); else if (Channel->Srate() != SymbolRate || strcmp(Channel->Parameters(), dtp.ToString('S'))) forceTransponderUpdate = true; // get us receiving this transponder } } if (!found || forceTransponderUpdate) { for (int n = 0; n < NumFrequencies; n++) { cChannel *Channel = new cChannel; Channel->SetId(NULL, ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0); if (Channel->SetTransponderData(Source, Frequencies[n], SymbolRate, dtp.ToString('S'))) EITScanner.AddTransponder(Channel); else delete Channel; } } } } break; case SI::S2SatelliteDeliverySystemDescriptorTag: { if (Setup.UpdateChannels >= 5) { for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) { if (!Channel->GroupSep() && cSource::IsSat(Channel->Source()) && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) { SI::S2SatelliteDeliverySystemDescriptor *sd = (SI::S2SatelliteDeliverySystemDescriptor *)d; cDvbTransponderParameters dtp(Channel->Parameters()); dtp.SetStreamId(sd->getInputStreamIdentifier()); dbgnit(" stream id = %d\n", dtp.StreamId()); ChannelsModified |= Channel->SetTransponderData(Channel->Source(), Channel->Frequency(), Channel->Srate(), dtp.ToString('S')); break; } } } } break; case SI::CableDeliverySystemDescriptorTag: { SI::CableDeliverySystemDescriptor *sd = (SI::CableDeliverySystemDescriptor *)d; cDvbTransponderParameters dtp; int Source = cSource::FromData(cSource::stCable); int Frequency = Frequencies[0] = BCD2INT(sd->getFrequency()) / 10; //XXX FEC_outer??? static int CodeRates[] = { FEC_NONE, FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_8_9, FEC_3_5, FEC_4_5, FEC_9_10, FEC_AUTO, FEC_AUTO, FEC_AUTO, FEC_AUTO, FEC_AUTO, FEC_NONE }; dtp.SetCoderateH(CodeRates[sd->getFecInner()]); static int Modulations[] = { QPSK, QAM_16, QAM_32, QAM_64, QAM_128, QAM_256, QAM_AUTO }; dtp.SetModulation(Modulations[min(sd->getModulation(), 6)]); int SymbolRate = BCD2INT(sd->getSymbolRate()) / 10; dbgnit(" %s %d %d %d %d\n", *cSource::ToString(Source), Frequency, dtp.CoderateH(), dtp.Modulation(), SymbolRate); if (Setup.UpdateChannels >= 5) { bool found = false; bool forceTransponderUpdate = false; for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) { if (!Channel->GroupSep() && Channel->Source() == Source && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) { int transponder = Channel->Transponder(); if (!ISTRANSPONDER(Frequency / 1000, transponder)) { for (int n = 0; n < NumFrequencies; n++) { if (ISTRANSPONDER(Frequencies[n] / 1000, transponder)) { Frequency = Frequencies[n]; break; } } } if (!ISTRANSPONDER(Frequency / 1000, transponder)) continue; // a channel with obsolete/wrong/other(?) transponder found = true; if (ISTRANSPONDER(transponder, Transponder())) // only modify channels if we're actually receiving this transponder ChannelsModified |= Channel->SetTransponderData(Source, Frequency, SymbolRate, dtp.ToString('C')); else if (Channel->Srate() != SymbolRate || strcmp(Channel->Parameters(), dtp.ToString('C'))) forceTransponderUpdate = true; // get us receiving this transponder } } if (!found || forceTransponderUpdate) { for (int n = 0; n < NumFrequencies; n++) { cChannel *Channel = new cChannel; Channel->SetId(NULL, ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0); if (Channel->SetTransponderData(Source, Frequencies[n], SymbolRate, dtp.ToString('C'))) EITScanner.AddTransponder(Channel); else delete Channel; } } } } break; case SI::TerrestrialDeliverySystemDescriptorTag: { SI::TerrestrialDeliverySystemDescriptor *sd = (SI::TerrestrialDeliverySystemDescriptor *)d; cDvbTransponderParameters dtp; int Source = cSource::FromData(cSource::stTerr); int Frequency = Frequencies[0] = sd->getFrequency() * 10; static int Bandwidths[] = { 8000000, 7000000, 6000000, 5000000, 0, 0, 0, 0 }; dtp.SetBandwidth(Bandwidths[sd->getBandwidth()]); static int Constellations[] = { QPSK, QAM_16, QAM_64, QAM_AUTO }; dtp.SetModulation(Constellations[sd->getConstellation()]); dtp.SetSystem(DVB_SYSTEM_1); static int Hierarchies[] = { HIERARCHY_NONE, HIERARCHY_1, HIERARCHY_2, HIERARCHY_4, HIERARCHY_AUTO, HIERARCHY_AUTO, HIERARCHY_AUTO, HIERARCHY_AUTO }; dtp.SetHierarchy(Hierarchies[sd->getHierarchy()]); static int CodeRates[] = { FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_AUTO, FEC_AUTO, FEC_AUTO }; dtp.SetCoderateH(CodeRates[sd->getCodeRateHP()]); dtp.SetCoderateL(CodeRates[sd->getCodeRateLP()]); static int GuardIntervals[] = { GUARD_INTERVAL_1_32, GUARD_INTERVAL_1_16, GUARD_INTERVAL_1_8, GUARD_INTERVAL_1_4 }; dtp.SetGuard(GuardIntervals[sd->getGuardInterval()]); static int TransmissionModes[] = { TRANSMISSION_MODE_2K, TRANSMISSION_MODE_8K, TRANSMISSION_MODE_4K, TRANSMISSION_MODE_AUTO }; dtp.SetTransmission(TransmissionModes[sd->getTransmissionMode()]); dbgnit(" %s %d %d %d %d %d %d %d %d\n", *cSource::ToString(Source), Frequency, dtp.Bandwidth(), dtp.Modulation(), dtp.Hierarchy(), dtp.CoderateH(), dtp.CoderateL(), dtp.Guard(), dtp.Transmission()); if (Setup.UpdateChannels >= 5) { bool found = false; bool forceTransponderUpdate = false; for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) { if (!Channel->GroupSep() && Channel->Source() == Source && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) { // Preserve parameters set separately in T2DeliverySystemDescripto: cDvbTransponderParameters dtpc(Channel->Parameters()); dtp.SetSystem(dtpc.System()); dtp.SetStreamId(dtpc.StreamId()); dtp.SetT2SystemId(dtp.T2SystemId()); dtp.SetSisoMiso(dtpc.SisoMiso()); dtp.SetBandwidth(dtpc.Bandwidth()); dtp.SetGuard(dtpc.Guard()); dtp.SetTransmission(dtpc.Transmission()); // int transponder = Channel->Transponder(); if (!ISTRANSPONDER(Frequency / 1000000, transponder)) { for (int n = 0; n < NumFrequencies; n++) { if (ISTRANSPONDER(Frequencies[n] / 1000000, transponder)) { Frequency = Frequencies[n]; break; } } } if (!ISTRANSPONDER(Frequency / 1000000, transponder)) continue; // a channel with obsolete/wrong/other(?) transponder found = true; if (ISTRANSPONDER(transponder, Transponder())) // only modify channels if we're actually receiving this transponder ChannelsModified |= Channel->SetTransponderData(Source, Frequency, 0, dtp.ToString('T')); else if (strcmp(Channel->Parameters(), dtp.ToString('T'))) forceTransponderUpdate = true; // get us receiving this transponder } } if (!found || forceTransponderUpdate) { for (int n = 0; n < NumFrequencies; n++) { cChannel *Channel = new cChannel; Channel->SetId(NULL, ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0); if (Channel->SetTransponderData(Source, Frequencies[n], 0, dtp.ToString('T'))) EITScanner.AddTransponder(Channel); else delete Channel; } } } } break; case SI::ExtensionDescriptorTag: { SI::ExtensionDescriptor *sd = (SI::ExtensionDescriptor *)d; switch (sd->getExtensionDescriptorTag()) { case SI::T2DeliverySystemDescriptorTag: { if (Setup.UpdateChannels >= 5) { for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) { int Source = cSource::FromData(cSource::stTerr); if (!Channel->GroupSep() && Channel->Source() == Source && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) { SI::T2DeliverySystemDescriptor *td = (SI::T2DeliverySystemDescriptor *)d; int Frequency = Channel->Frequency(); int SymbolRate = Channel->Srate(); cDvbTransponderParameters dtp(Channel->Parameters()); dtp.SetSystem(DVB_SYSTEM_2); dtp.SetStreamId(td->getPlpId()); dtp.SetT2SystemId(td->getT2SystemId()); if (td->getExtendedDataFlag()) { dtp.SetSisoMiso(td->getSisoMiso()); static int T2Bandwidths[] = { 8000000, 7000000, 6000000, 5000000, 10000000, 1712000, 0, 0 }; dtp.SetBandwidth(T2Bandwidths[td->getBandwidth()]); static int T2GuardIntervals[] = { GUARD_INTERVAL_1_32, GUARD_INTERVAL_1_16, GUARD_INTERVAL_1_8, GUARD_INTERVAL_1_4, GUARD_INTERVAL_1_128, GUARD_INTERVAL_19_128, GUARD_INTERVAL_19_256, 0 }; dtp.SetGuard(T2GuardIntervals[td->getGuardInterval()]); static int T2TransmissionModes[] = { TRANSMISSION_MODE_2K, TRANSMISSION_MODE_8K, TRANSMISSION_MODE_4K, TRANSMISSION_MODE_1K, TRANSMISSION_MODE_16K, TRANSMISSION_MODE_32K, TRANSMISSION_MODE_AUTO, TRANSMISSION_MODE_AUTO }; dtp.SetTransmission(T2TransmissionModes[td->getTransmissionMode()]); //TODO add parsing of frequencies } dbgnit(" stream id = %d\n", dtp.StreamId()); ChannelsModified |= Channel->SetTransponderData(Source, Frequency, SymbolRate, dtp.ToString('T')); } } } } break; default: ; } } break; case SI::LogicalChannelDescriptorTag: if (Setup.StandardCompliance == STANDARD_NORDIG) { SI::LogicalChannelDescriptor *lcd = (SI::LogicalChannelDescriptor *)d; SI::LogicalChannelDescriptor::LogicalChannel LogicalChannel; for (SI::Loop::Iterator it4; lcd->logicalChannelLoop.getNext(LogicalChannel, it4); ) { if (LogicalChannel.getVisibleServiceFlag()) { int lcn = LogicalChannel.getLogicalChannelNumber(); int sid = LogicalChannel.getServiceId(); for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) { if (!Channel->GroupSep() && Channel->Sid() == sid && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) { ChannelsModified |= Channel->SetLcn(lcn); break; } } } } } break; case SI::HdSimulcastLogicalChannelDescriptorTag: if (Setup.StandardCompliance == STANDARD_NORDIG) { SI::HdSimulcastLogicalChannelDescriptor *lcd = (SI::HdSimulcastLogicalChannelDescriptor *)d; SI::HdSimulcastLogicalChannelDescriptor::HdSimulcastLogicalChannel HdSimulcastLogicalChannel; for (SI::Loop::Iterator it4; lcd->hdSimulcastLogicalChannelLoop.getNext(HdSimulcastLogicalChannel, it4); ) { if (HdSimulcastLogicalChannel.getVisibleServiceFlag()) { int lcn = HdSimulcastLogicalChannel.getLogicalChannelNumber(); int sid = HdSimulcastLogicalChannel.getServiceId(); for (cChannel *Channel = Channels->First(); Channel; Channel = Channels->Next(Channel)) { if (!Channel->GroupSep() && Channel->Sid() == sid && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) { ChannelsModified |= Channel->SetLcn(lcn); break; } } } } } break; default: ; } delete d; } } if (nit.getSectionNumber() == nit.getLastSectionNumber()) { dbgnit(" trigger sdtFilter for current tp %d\n", Transponder()); sdtFilter->Trigger(Source()); } StateKey.Remove(ChannelsModified); }