mirror of
https://github.com/vdr-projects/vdr.git
synced 2025-03-01 10:50:46 +00:00
1834751c45
- Added a note about 'Id' being obsolete to the description of cDevice::PlayAudio(). - Switched to the new S2API driver API, which was decided to become the official DVB API in the kernel (based on patches from Igor M. Liplianin, Niels Wagenaar and Edgar Hucek). VDR now uses the S2API driver from http://linuxtv.org/hg/v4l-dvb. In order to correctly detect DVB-S2 capable devices, you need to apply the patch from ftp://ftp.cadsoft.de/vdr/Developer/v4l-dvb-s2api-add-s2-capability.diff to the driver source, because the S2API doesn't provide a way of telling whether a device can handle DVB-S2 transponders. - The cDvbTuner::IsTunedTo() function now also checks the symbol rate in case of DVB-S and DVB-C. - Improved handling PES video packets with zero length when converting from TS to PES. For good replay in Transfer Mode on full featured DVB cards you may want to apply the patch from ftp://ftp.cadsoft.de/vdr/Developer/av7110_v4ldvb_api5_audiobuf_test_1.diff to the driver (thanks to Oliver Endriss).
295 lines
15 KiB
C
295 lines
15 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 2.2 2008/12/06 15:46:50 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 "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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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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}
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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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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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char Polarization = 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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int CodeRate = CodeRates[sd->getFecInner()];
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static int Modulations[] = { QPSK, PSK_8, QAM_16 };
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int Modulation = Modulations[sd->getModulationType()];
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int System = sd->getModulationSystem() ? SYS_DVBS2 : SYS_DVBS;
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static int RollOffs[] = { ROLLOFF_35, ROLLOFF_25, ROLLOFF_20, ROLLOFF_AUTO };
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int RollOff = 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], 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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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, Polarization), transponder)) {
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for (int n = 0; n < NumFrequencies; n++) {
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if (ISTRANSPONDER(cChannel::Transponder(Frequencies[n], 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, Polarization), Transponder())) // only modify channels if we're actually receiving this transponder
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Channel->SetSatTransponderData(Source, Frequency, Polarization, SymbolRate, CodeRate, Modulation, System, RollOff);
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}
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}
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if (!found) {
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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->SetSatTransponderData(Source, Frequencies[n], Polarization, SymbolRate, CodeRate, Modulation, System, RollOff))
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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::CableDeliverySystemDescriptorTag: {
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SI::CableDeliverySystemDescriptor *sd = (SI::CableDeliverySystemDescriptor *)d;
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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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int CodeRate = 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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int Modulation = 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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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->SetCableTransponderData(Source, Frequency, Modulation, SymbolRate, CodeRate);
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}
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}
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if (!found) {
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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->SetCableTransponderData(Source, Frequencies[n], Modulation, SymbolRate, CodeRate))
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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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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, 0, 0, 0, 0, 0 };
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int Bandwidth = Bandwidths[sd->getBandwidth()];
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static int Constellations[] = { QPSK, QAM_16, QAM_64, QAM_AUTO };
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int Constellation = Constellations[sd->getConstellation()];
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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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int Hierarchy = 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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int CodeRateHP = CodeRates[sd->getCodeRateHP()];
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int CodeRateLP = 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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int GuardInterval = GuardIntervals[sd->getGuardInterval()];
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static int TransmissionModes[] = { TRANSMISSION_MODE_2K, TRANSMISSION_MODE_8K, TRANSMISSION_MODE_AUTO, TRANSMISSION_MODE_AUTO };
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int TransmissionMode = 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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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->SetTerrTransponderData(Source, Frequency, Bandwidth, Constellation, Hierarchy, CodeRateHP, CodeRateLP, GuardInterval, TransmissionMode);
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}
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}
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if (!found) {
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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->SetTerrTransponderData(Source, Frequencies[n], Bandwidth, Constellation, Hierarchy, CodeRateHP, CodeRateLP, GuardInterval, TransmissionMode))
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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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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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