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-rw-r--r--nit.c131
1 files changed, 38 insertions, 93 deletions
diff --git a/nit.c b/nit.c
index 13183755..aaf7c88c 100644
--- a/nit.c
+++ b/nit.c
@@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
- * $Id: nit.c 3.5 2015/02/04 09:13:54 kls Exp $
+ * $Id: nit.c 4.1 2015/03/16 15:24:18 kls Exp $
*/
#include "nit.h"
@@ -19,19 +19,22 @@
#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;
- numNits = 0;
- networkId = 0;
- Set(0x10, 0x40); // NIT
+ Set(0x10, SI::TableIdNIT);
}
void cNitFilter::SetStatus(bool On)
{
cFilter::SetStatus(On);
- numNits = 0;
- networkId = 0;
sectionSyncer.Reset();
}
@@ -40,63 +43,28 @@ void cNitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length
SI::NIT nit(Data, false);
if (!nit.CheckCRCAndParse())
return;
- // Some broadcasters send more than one NIT, with no apparent way of telling which
- // one is the right one to use. This is an attempt to find the NIT that contains
- // the transponder it was transmitted on and use only that one:
- int ThisNIT = -1;
- if (!networkId) {
- for (int i = 0; i < numNits; i++) {
- if (nits[i].networkId == nit.getNetworkId()) {
- if (nit.getSectionNumber() == 0) {
- // all NITs have passed by
- for (int j = 0; j < numNits; j++) {
- if (nits[j].hasTransponder) {
- networkId = nits[j].networkId;
- //printf("taking NIT with network ID %d\n", networkId);
- //XXX what if more than one NIT contains this transponder???
- break;
- }
- }
- if (!networkId) {
- //printf("none of the NITs contains transponder %d\n", Transponder());
- return;
- }
- }
- else {
- ThisNIT = i;
- break;
- }
- }
- }
- if (!networkId && ThisNIT < 0 && numNits < MAXNITS) {
- if (nit.getSectionNumber() == 0) {
- *nits[numNits].name = 0;
- 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(nits[numNits].name, MAXNETWORKNAME);
- }
- break;
- default: ;
- }
- delete d;
- }
- nits[numNits].networkId = nit.getNetworkId();
- nits[numNits].hasTransponder = false;
- //printf("NIT[%d] %5d '%s'\n", numNits, nits[numNits].networkId, nits[numNits].name);
- ThisNIT = numNits;
- numNits++;
+ 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);
}
- else if (networkId != nit.getNetworkId())
- return; // ignore all other NITs
- else if (!sectionSyncer.Sync(nit.getVersionNumber(), nit.getSectionNumber(), nit.getLastSectionNumber()))
- return;
- if (!Channels.Lock(true, 10))
+ if (!Channels.Lock(true, 10)) {
+ sectionSyncer.Reset(); // let's not miss any section of the NIT
return;
+ }
SI::NIT::TransportStream ts;
for (SI::Loop::Iterator it; nit.transportStreamLoop.getNext(ts, it); ) {
SI::Descriptor *d;
@@ -118,6 +86,7 @@ void cNitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length
default: ;
}
Frequencies[n++] = f;
+ dbgnit(" Frequencies[%d] = %d\n", n - 1, f);
}
}
else
@@ -142,16 +111,7 @@ void cNitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length
static int RollOffs[] = { ROLLOFF_35, ROLLOFF_25, ROLLOFF_20, ROLLOFF_AUTO };
dtp.SetRollOff(sd->getModulationSystem() ? RollOffs[sd->getRollOff()] : ROLLOFF_AUTO);
int SymbolRate = BCD2INT(sd->getSymbolRate()) / 10;
- if (ThisNIT >= 0) {
- for (int n = 0; n < NumFrequencies; n++) {
- if (ISTRANSPONDER(cChannel::Transponder(Frequencies[n], dtp.Polarization()), Transponder())) {
- nits[ThisNIT].hasTransponder = true;
- //printf("has transponder %d\n", Transponder());
- break;
- }
- }
- break;
- }
+ dbgnit(" %s %d %c %d %d\n", *cSource::ToString(Source), Frequency, Polarizations[sd->getPolarization()], SymbolRate, cChannel::Transponder(Frequency, Polarizations[sd->getPolarization()]));
if (Setup.UpdateChannels >= 5) {
bool found = false;
bool forceTransponderUpdate = false;
@@ -184,7 +144,8 @@ void cNitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length
}
}
}
- sdtFilter->Trigger(Source);
+ if (ISTRANSPONDER(cChannel::Transponder(Frequency, dtp.Polarization()), Transponder()))
+ sdtFilter->Trigger(Source);
}
break;
case SI::S2SatelliteDeliverySystemDescriptorTag: {
@@ -213,16 +174,7 @@ void cNitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length
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;
- if (ThisNIT >= 0) {
- for (int n = 0; n < NumFrequencies; n++) {
- if (ISTRANSPONDER(Frequencies[n] / 1000, Transponder())) {
- nits[ThisNIT].hasTransponder = true;
- //printf("has transponder %d\n", Transponder());
- break;
- }
- }
- break;
- }
+ dbgnit(" %s %d %d %d %d\n", *cSource::ToString(Source), Frequency, CodeRates[sd->getFecInner()], Modulations[min(sd->getModulation(), 6)], SymbolRate);
if (Setup.UpdateChannels >= 5) {
bool found = false;
bool forceTransponderUpdate = false;
@@ -255,7 +207,8 @@ void cNitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length
}
}
}
- sdtFilter->Trigger(Source);
+ if (ISTRANSPONDER(Frequency / 1000, Transponder()))
+ sdtFilter->Trigger(Source);
}
break;
case SI::TerrestrialDeliverySystemDescriptorTag: {
@@ -277,16 +230,7 @@ void cNitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length
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()]);
- if (ThisNIT >= 0) {
- for (int n = 0; n < NumFrequencies; n++) {
- if (ISTRANSPONDER(Frequencies[n] / 1000000, Transponder())) {
- nits[ThisNIT].hasTransponder = true;
- //printf("has transponder %d\n", Transponder());
- break;
- }
- }
- break;
- }
+ dbgnit(" %s %d %d %d %d %d %d %d %d\n", *cSource::ToString(Source), Frequency, Bandwidths[sd->getBandwidth()], Constellations[sd->getConstellation()], Hierarchies[sd->getHierarchy()], CodeRates[sd->getCodeRateHP()], CodeRates[sd->getCodeRateLP()], GuardIntervals[sd->getGuardInterval()], TransmissionModes[sd->getTransmissionMode()]);
if (Setup.UpdateChannels >= 5) {
bool found = false;
bool forceTransponderUpdate = false;
@@ -319,7 +263,8 @@ void cNitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length
}
}
}
- sdtFilter->Trigger(Source);
+ if (ISTRANSPONDER(Frequency / 1000000, Transponder()))
+ sdtFilter->Trigger(Source);
}
break;
case SI::ExtensionDescriptorTag: {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 03:19:38 +0000