mirror of https://github.com/VDR4Arch/vdr.git
362 lines
20 KiB
C
362 lines
20 KiB
C
/*
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* nit.c: NIT section filter
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*
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* See the main source file 'vdr.c' for copyright information and
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* how to reach the author.
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*
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* $Id: nit.c 2.10 2013/03/07 09:42:29 kls Exp $
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*/
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#include "nit.h"
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#include <linux/dvb/frontend.h>
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#include "channels.h"
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#include "dvbdevice.h"
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#include "eitscan.h"
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#include "libsi/section.h"
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#include "libsi/descriptor.h"
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#include "tools.h"
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#define DVB_SYSTEM_1 0 // see also dvbdevice.c
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#define DVB_SYSTEM_2 1
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cNitFilter::cNitFilter(void)
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{
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numNits = 0;
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networkId = 0;
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Set(0x10, 0x40); // NIT
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}
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void cNitFilter::SetStatus(bool On)
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{
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cFilter::SetStatus(On);
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numNits = 0;
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networkId = 0;
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sectionSyncer.Reset();
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}
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void cNitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length)
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{
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SI::NIT nit(Data, false);
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if (!nit.CheckCRCAndParse())
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return;
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// Some broadcasters send more than one NIT, with no apparent way of telling which
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// one is the right one to use. This is an attempt to find the NIT that contains
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// the transponder it was transmitted on and use only that one:
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int ThisNIT = -1;
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if (!networkId) {
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for (int i = 0; i < numNits; i++) {
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if (nits[i].networkId == nit.getNetworkId()) {
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if (nit.getSectionNumber() == 0) {
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// all NITs have passed by
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for (int j = 0; j < numNits; j++) {
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if (nits[j].hasTransponder) {
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networkId = nits[j].networkId;
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//printf("taking NIT with network ID %d\n", networkId);
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//XXX what if more than one NIT contains this transponder???
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break;
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}
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}
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if (!networkId) {
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//printf("none of the NITs contains transponder %d\n", Transponder());
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return;
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}
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}
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else {
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ThisNIT = i;
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break;
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}
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}
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}
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if (!networkId && ThisNIT < 0 && numNits < MAXNITS) {
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if (nit.getSectionNumber() == 0) {
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*nits[numNits].name = 0;
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SI::Descriptor *d;
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for (SI::Loop::Iterator it; (d = nit.commonDescriptors.getNext(it)); ) {
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switch (d->getDescriptorTag()) {
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case SI::NetworkNameDescriptorTag: {
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SI::NetworkNameDescriptor *nnd = (SI::NetworkNameDescriptor *)d;
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nnd->name.getText(nits[numNits].name, MAXNETWORKNAME);
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}
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break;
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default: ;
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}
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delete d;
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}
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nits[numNits].networkId = nit.getNetworkId();
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nits[numNits].hasTransponder = false;
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//printf("NIT[%d] %5d '%s'\n", numNits, nits[numNits].networkId, nits[numNits].name);
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ThisNIT = numNits;
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numNits++;
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}
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}
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}
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else if (networkId != nit.getNetworkId())
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return; // ignore all other NITs
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else if (!sectionSyncer.Sync(nit.getVersionNumber(), nit.getSectionNumber(), nit.getLastSectionNumber()))
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return;
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if (!Channels.Lock(true, 10))
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return;
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SI::NIT::TransportStream ts;
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for (SI::Loop::Iterator it; nit.transportStreamLoop.getNext(ts, it); ) {
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SI::Descriptor *d;
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SI::Loop::Iterator it2;
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SI::FrequencyListDescriptor *fld = (SI::FrequencyListDescriptor *)ts.transportStreamDescriptors.getNext(it2, SI::FrequencyListDescriptorTag);
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int NumFrequencies = fld ? fld->frequencies.getCount() + 1 : 1;
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int Frequencies[NumFrequencies];
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if (fld) {
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int ct = fld->getCodingType();
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if (ct > 0) {
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int n = 1;
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for (SI::Loop::Iterator it3; fld->frequencies.hasNext(it3); ) {
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int f = fld->frequencies.getNext(it3);
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switch (ct) {
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case 1: f = BCD2INT(f) / 100; break;
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case 2: f = BCD2INT(f) / 10; break;
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case 3: f = f * 10; break;
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default: ;
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}
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Frequencies[n++] = f;
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}
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}
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else
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NumFrequencies = 1;
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}
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delete fld;
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for (SI::Loop::Iterator it2; (d = ts.transportStreamDescriptors.getNext(it2)); ) {
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switch (d->getDescriptorTag()) {
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case SI::SatelliteDeliverySystemDescriptorTag: {
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SI::SatelliteDeliverySystemDescriptor *sd = (SI::SatelliteDeliverySystemDescriptor *)d;
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cDvbTransponderParameters dtp;
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int Source = cSource::FromData(cSource::stSat, BCD2INT(sd->getOrbitalPosition()), sd->getWestEastFlag());
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int Frequency = Frequencies[0] = BCD2INT(sd->getFrequency()) / 100;
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static char Polarizations[] = { 'H', 'V', 'L', 'R' };
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dtp.SetPolarization(Polarizations[sd->getPolarization()]);
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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 };
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dtp.SetCoderateH(CodeRates[sd->getFecInner()]);
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static int Modulations[] = { QAM_AUTO, QPSK, PSK_8, QAM_16 };
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dtp.SetModulation(Modulations[sd->getModulationType()]);
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dtp.SetSystem(sd->getModulationSystem() ? DVB_SYSTEM_2 : DVB_SYSTEM_1);
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static int RollOffs[] = { ROLLOFF_35, ROLLOFF_25, ROLLOFF_20, ROLLOFF_AUTO };
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dtp.SetRollOff(sd->getModulationSystem() ? RollOffs[sd->getRollOff()] : ROLLOFF_AUTO);
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int SymbolRate = BCD2INT(sd->getSymbolRate()) / 10;
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if (ThisNIT >= 0) {
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for (int n = 0; n < NumFrequencies; n++) {
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if (ISTRANSPONDER(cChannel::Transponder(Frequencies[n], dtp.Polarization()), Transponder())) {
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nits[ThisNIT].hasTransponder = true;
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//printf("has transponder %d\n", Transponder());
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break;
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}
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}
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break;
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}
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if (Setup.UpdateChannels >= 5) {
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bool found = false;
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bool forceTransponderUpdate = false;
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for (cChannel *Channel = Channels.First(); Channel; Channel = Channels.Next(Channel)) {
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if (!Channel->GroupSep() && Channel->Source() == Source && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) {
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int transponder = Channel->Transponder();
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found = true;
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if (!ISTRANSPONDER(cChannel::Transponder(Frequency, dtp.Polarization()), transponder)) {
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for (int n = 0; n < NumFrequencies; n++) {
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if (ISTRANSPONDER(cChannel::Transponder(Frequencies[n], dtp.Polarization()), transponder)) {
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Frequency = Frequencies[n];
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break;
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}
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}
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}
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if (ISTRANSPONDER(cChannel::Transponder(Frequency, dtp.Polarization()), Transponder())) // only modify channels if we're actually receiving this transponder
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Channel->SetTransponderData(Source, Frequency, SymbolRate, dtp.ToString('S'));
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else if (Channel->Srate() != SymbolRate || strcmp(Channel->Parameters(), dtp.ToString('S')))
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forceTransponderUpdate = true; // get us receiving this transponder
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}
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}
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if (!found || forceTransponderUpdate) {
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for (int n = 0; n < NumFrequencies; n++) {
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cChannel *Channel = new cChannel;
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Channel->SetId(ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0);
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if (Channel->SetTransponderData(Source, Frequencies[n], SymbolRate, dtp.ToString('S')))
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EITScanner.AddTransponder(Channel);
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else
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delete Channel;
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}
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}
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}
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}
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break;
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case SI::S2SatelliteDeliverySystemDescriptorTag: {
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if (Setup.UpdateChannels >= 5) {
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for (cChannel *Channel = Channels.First(); Channel; Channel = Channels.Next(Channel)) {
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if (!Channel->GroupSep() && cSource::IsSat(Channel->Source()) && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) {
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SI::S2SatelliteDeliverySystemDescriptor *sd = (SI::S2SatelliteDeliverySystemDescriptor *)d;
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cDvbTransponderParameters dtp(Channel->Parameters());
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dtp.SetSystem(DVB_SYSTEM_2);
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dtp.SetStreamId(sd->getInputStreamIdentifier());
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Channel->SetTransponderData(Channel->Source(), Channel->Frequency(), Channel->Srate(), dtp.ToString('S'));
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break;
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}
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}
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}
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}
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break;
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case SI::CableDeliverySystemDescriptorTag: {
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SI::CableDeliverySystemDescriptor *sd = (SI::CableDeliverySystemDescriptor *)d;
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cDvbTransponderParameters dtp;
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int Source = cSource::FromData(cSource::stCable);
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int Frequency = Frequencies[0] = BCD2INT(sd->getFrequency()) / 10;
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//XXX FEC_outer???
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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 };
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dtp.SetCoderateH(CodeRates[sd->getFecInner()]);
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static int Modulations[] = { QPSK, QAM_16, QAM_32, QAM_64, QAM_128, QAM_256, QAM_AUTO };
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dtp.SetModulation(Modulations[min(sd->getModulation(), 6)]);
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int SymbolRate = BCD2INT(sd->getSymbolRate()) / 10;
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if (ThisNIT >= 0) {
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for (int n = 0; n < NumFrequencies; n++) {
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if (ISTRANSPONDER(Frequencies[n] / 1000, Transponder())) {
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nits[ThisNIT].hasTransponder = true;
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//printf("has transponder %d\n", Transponder());
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break;
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}
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}
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break;
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}
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if (Setup.UpdateChannels >= 5) {
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bool found = false;
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bool forceTransponderUpdate = false;
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for (cChannel *Channel = Channels.First(); Channel; Channel = Channels.Next(Channel)) {
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if (!Channel->GroupSep() && Channel->Source() == Source && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) {
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int transponder = Channel->Transponder();
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found = true;
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if (!ISTRANSPONDER(Frequency / 1000, transponder)) {
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for (int n = 0; n < NumFrequencies; n++) {
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if (ISTRANSPONDER(Frequencies[n] / 1000, transponder)) {
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Frequency = Frequencies[n];
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break;
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}
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}
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}
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if (ISTRANSPONDER(Frequency / 1000, Transponder())) // only modify channels if we're actually receiving this transponder
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Channel->SetTransponderData(Source, Frequency, SymbolRate, dtp.ToString('C'));
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else if (Channel->Srate() != SymbolRate || strcmp(Channel->Parameters(), dtp.ToString('C')))
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forceTransponderUpdate = true; // get us receiving this transponder
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}
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}
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if (!found || forceTransponderUpdate) {
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for (int n = 0; n < NumFrequencies; n++) {
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cChannel *Channel = new cChannel;
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Channel->SetId(ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0);
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if (Channel->SetTransponderData(Source, Frequencies[n], SymbolRate, dtp.ToString('C')))
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EITScanner.AddTransponder(Channel);
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else
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delete Channel;
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}
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}
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}
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}
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break;
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case SI::TerrestrialDeliverySystemDescriptorTag: {
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SI::TerrestrialDeliverySystemDescriptor *sd = (SI::TerrestrialDeliverySystemDescriptor *)d;
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cDvbTransponderParameters dtp;
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int Source = cSource::FromData(cSource::stTerr);
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int Frequency = Frequencies[0] = sd->getFrequency() * 10;
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static int Bandwidths[] = { 8000000, 7000000, 6000000, 5000000, 0, 0, 0, 0 };
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dtp.SetBandwidth(Bandwidths[sd->getBandwidth()]);
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static int Constellations[] = { QPSK, QAM_16, QAM_64, QAM_AUTO };
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dtp.SetModulation(Constellations[sd->getConstellation()]);
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dtp.SetSystem(DVB_SYSTEM_1);
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static int Hierarchies[] = { HIERARCHY_NONE, HIERARCHY_1, HIERARCHY_2, HIERARCHY_4, HIERARCHY_AUTO, HIERARCHY_AUTO, HIERARCHY_AUTO, HIERARCHY_AUTO };
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dtp.SetHierarchy(Hierarchies[sd->getHierarchy()]);
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static int CodeRates[] = { FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_AUTO, FEC_AUTO, FEC_AUTO };
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dtp.SetCoderateH(CodeRates[sd->getCodeRateHP()]);
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dtp.SetCoderateL(CodeRates[sd->getCodeRateLP()]);
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static int GuardIntervals[] = { GUARD_INTERVAL_1_32, GUARD_INTERVAL_1_16, GUARD_INTERVAL_1_8, GUARD_INTERVAL_1_4 };
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dtp.SetGuard(GuardIntervals[sd->getGuardInterval()]);
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static int TransmissionModes[] = { TRANSMISSION_MODE_2K, TRANSMISSION_MODE_8K, TRANSMISSION_MODE_4K, TRANSMISSION_MODE_AUTO };
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dtp.SetTransmission(TransmissionModes[sd->getTransmissionMode()]);
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if (ThisNIT >= 0) {
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for (int n = 0; n < NumFrequencies; n++) {
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if (ISTRANSPONDER(Frequencies[n] / 1000000, Transponder())) {
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nits[ThisNIT].hasTransponder = true;
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//printf("has transponder %d\n", Transponder());
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break;
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}
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}
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break;
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}
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if (Setup.UpdateChannels >= 5) {
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bool found = false;
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bool forceTransponderUpdate = false;
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for (cChannel *Channel = Channels.First(); Channel; Channel = Channels.Next(Channel)) {
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if (!Channel->GroupSep() && Channel->Source() == Source && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) {
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int transponder = Channel->Transponder();
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found = true;
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if (!ISTRANSPONDER(Frequency / 1000000, transponder)) {
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for (int n = 0; n < NumFrequencies; n++) {
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if (ISTRANSPONDER(Frequencies[n] / 1000000, transponder)) {
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Frequency = Frequencies[n];
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break;
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}
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}
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}
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if (ISTRANSPONDER(Frequency / 1000000, Transponder())) // only modify channels if we're actually receiving this transponder
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Channel->SetTransponderData(Source, Frequency, 0, dtp.ToString('T'));
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else if (strcmp(Channel->Parameters(), dtp.ToString('T')))
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forceTransponderUpdate = true; // get us receiving this transponder
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}
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}
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if (!found || forceTransponderUpdate) {
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for (int n = 0; n < NumFrequencies; n++) {
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cChannel *Channel = new cChannel;
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Channel->SetId(ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0);
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if (Channel->SetTransponderData(Source, Frequencies[n], 0, dtp.ToString('T')))
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EITScanner.AddTransponder(Channel);
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else
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delete Channel;
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}
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}
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}
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}
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break;
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case SI::ExtensionDescriptorTag: {
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SI::ExtensionDescriptor *sd = (SI::ExtensionDescriptor *)d;
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switch (sd->getExtensionDescriptorTag()) {
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case SI::T2DeliverySystemDescriptorTag: {
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if (Setup.UpdateChannels >= 5) {
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for (cChannel *Channel = Channels.First(); Channel; Channel = Channels.Next(Channel)) {
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int Source = cSource::FromData(cSource::stTerr);
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if (!Channel->GroupSep() && Channel->Source() == Source && Channel->Nid() == ts.getOriginalNetworkId() && Channel->Tid() == ts.getTransportStreamId()) {
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SI::T2DeliverySystemDescriptor *td = (SI::T2DeliverySystemDescriptor *)d;
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int Frequency = Channel->Frequency();
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int SymbolRate = Channel->Srate();
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//int SystemId = td->getSystemId();
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cDvbTransponderParameters dtp(Channel->Parameters());
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dtp.SetSystem(DVB_SYSTEM_2);
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dtp.SetStreamId(td->getPlpId());
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if (td->getExtendedDataFlag()) {
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static int T2Bandwidths[] = { 8000000, 7000000, 6000000, 5000000, 10000000, 1712000, 0, 0 };
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dtp.SetBandwidth(T2Bandwidths[td->getBandwidth()]);
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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 };
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dtp.SetGuard(T2GuardIntervals[td->getGuardInterval()]);
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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 };
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dtp.SetTransmission(T2TransmissionModes[td->getTransmissionMode()]);
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//TODO add parsing of frequencies
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}
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Channel->SetTransponderData(Source, Frequency, SymbolRate, dtp.ToString('T'));
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}
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}
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}
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}
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break;
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default: ;
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}
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}
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break;
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default: ;
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}
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delete d;
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}
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}
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Channels.Unlock();
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}
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