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-rw-r--r--nit.c139
1 files changed, 139 insertions, 0 deletions
diff --git a/nit.c b/nit.c
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+/*
+ * nit.c: NIT section filter
+ *
+ * See the main source file 'vdr.c' for copyright information and
+ * how to reach the author.
+ *
+ * $Id: nit.c 1.1 2004/01/11 15:42:51 kls Exp $
+ */
+
+#include "nit.h"
+#include <linux/dvb/frontend.h>
+#include "channels.h"
+#include "eitscan.h"
+#include "libsi/section.h"
+#include "libsi/descriptor.h"
+#include "tools.h"
+
+cNitFilter::cNitFilter(void)
+{
+ Set(0x10, 0x40); // NIT
+}
+
+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 (!Channels.Lock(true, 10))
+ return;
+ for (SI::Loop::Iterator it; nit.transportStreamLoop.hasNext(it); ) {
+ SI::NIT::TransportStream ts = nit.transportStreamLoop.getNext(it);
+ SI::Descriptor *d;
+ for (SI::Loop::Iterator it2; (d = ts.transportStreamDescriptors.getNext(it2)); ) {
+ switch (d->getDescriptorTag()) {
+ case SI::SatelliteDeliverySystemDescriptorTag: {
+ SI::SatelliteDeliverySystemDescriptor *sd = (SI::SatelliteDeliverySystemDescriptor *)d;
+ int Source = cSource::FromData(cSource::stSat, BCD2INT(sd->getOrbitalPosition()), sd->getWestEastFlag());
+ int Frequency = BCD2INT(sd->getFrequency()) / 100;
+ static char Polarizations[] = { 'h', 'v', 'l', 'r' };
+ char Polarization = Polarizations[sd->getPolarization()];
+ static int CodeRates[] = { FEC_NONE, FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE };
+ int CodeRate = CodeRates[sd->getFecInner()];
+ int SymbolRate = BCD2INT(sd->getSymbolRate()) / 10;
+ bool found = 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()) {
+ if (Setup.UpdateChannels >= 4)
+ Channel->SetSatTransponderData(Source, Frequency, Polarization, SymbolRate, CodeRate);
+ found = true;
+ }
+ }
+ if (!found && Setup.UpdateChannels >= 4) {
+ cChannel *Channel = new cChannel;
+ Channel->SetId(ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0, false);
+ if (Channel->SetSatTransponderData(Source, Frequency, Polarization, SymbolRate, CodeRate, false))
+ EITScanner.AddTransponder(Channel);
+ else
+ delete Channel;
+ }
+ }
+ break;
+ case SI::CableDeliverySystemDescriptorTag: {
+ SI::CableDeliverySystemDescriptor *sd = (SI::CableDeliverySystemDescriptor *)d;
+ int Source = cSource::FromData(cSource::stCable);
+ int Frequency = 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_NONE, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE, FEC_NONE };
+ int CodeRate = CodeRates[sd->getFecInner()];
+ static int Modulations[] = { QPSK, QAM_16, QAM_32, QAM_64, QAM_128, QAM_256 };
+ int Modulation = Modulations[sd->getModulation()];
+ int SymbolRate = BCD2INT(sd->getSymbolRate()) / 10;
+ bool found = 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()) {
+ if (Setup.UpdateChannels >= 4)
+ Channel->SetCableTransponderData(Source, Frequency, Modulation, SymbolRate, CodeRate);
+ found = true;
+ }
+ }
+ if (!found && Setup.UpdateChannels >= 4) {
+ cChannel *Channel = new cChannel;
+ Channel->SetId(ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0, false);
+ if (Channel->SetCableTransponderData(Source, Frequency, Modulation, SymbolRate, CodeRate, false))
+ EITScanner.AddTransponder(Channel);
+ else
+ delete Channel;
+ }
+ }
+ break;
+ case SI::TerrestrialDeliverySystemDescriptorTag: {
+ SI::TerrestrialDeliverySystemDescriptor *sd = (SI::TerrestrialDeliverySystemDescriptor *)d;
+ int Source = cSource::FromData(cSource::stCable);
+ int Frequency = sd->getFrequency() * 10;
+ static int Bandwidths[] = { BANDWIDTH_6_MHZ, BANDWIDTH_7_MHZ, BANDWIDTH_8_MHZ, BANDWIDTH_AUTO, BANDWIDTH_AUTO, BANDWIDTH_AUTO, BANDWIDTH_AUTO, BANDWIDTH_AUTO };
+ int Bandwidth = Bandwidths[sd->getBandwidth()];
+ static int Constellations[] = { QPSK, QAM_16, QAM_64, QAM_AUTO };
+ int Constellation = Constellations[sd->getConstellation()];
+ static int Hierarchies[] = { HIERARCHY_NONE, HIERARCHY_1, HIERARCHY_2, HIERARCHY_4 };
+ int Hierarchy = Hierarchies[sd->getHierarchy()];
+ static int CodeRates[] = { FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_NONE, FEC_NONE, FEC_NONE };
+ int CodeRateHP = CodeRates[sd->getCodeRateHP()];
+ int CodeRateLP = CodeRates[sd->getCodeRateLP()];
+ static int GuardIntervals[] = { GUARD_INTERVAL_1_4, GUARD_INTERVAL_1_8, GUARD_INTERVAL_1_16, GUARD_INTERVAL_1_32 };
+ int GuardInterval = GuardIntervals[sd->getGuardInterval()];
+ static int TransmissionModes[] = { TRANSMISSION_MODE_2K, TRANSMISSION_MODE_8K, TRANSMISSION_MODE_AUTO, TRANSMISSION_MODE_AUTO };
+ int TransmissionMode = TransmissionModes[sd->getTransmissionMode()];
+ bool found = 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()) {
+ if (Setup.UpdateChannels >= 4)
+ Channel->SetTerrTransponderData(Source, Frequency, Bandwidth, Constellation, Hierarchy, CodeRateHP, CodeRateLP, GuardInterval, TransmissionMode);
+ found = true;
+ }
+ }
+ if (!found && Setup.UpdateChannels >= 4) {
+ cChannel *Channel = new cChannel;
+ Channel->SetId(ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0, false);
+ if (Channel->SetTerrTransponderData(Source, Frequency, Bandwidth, Constellation, Hierarchy, CodeRateHP, CodeRateLP, GuardInterval, TransmissionMode, false))
+ EITScanner.AddTransponder(Channel);
+ else
+ delete Channel;
+ }
+ }
+ break;
+ default: ;
+ }
+ delete d;
+ }
+ }
+ Channels.Unlock();
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 22:29:19 +0000