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vdr/nit.c
Klaus Schmidinger 5ce592e54a Version 1.7.13 
- Updated the Italian OSD texts (thanks to Diego Pierotto).
- Changed the position of Sirius 4 to S4.8E in sources.conf (thanks to Alexander Gross).
- Updated the Finnish OSD texts (thanks to Rolf Ahrenberg).
- Moved the declaration of cMenuCommands to menu.h, so that plugins can use it.
- Added a note to the MANUAL, saying that adding new transponders only works if the
  "EPG scan" is active (suggested by Halim Sahim).
- Improved handling frames at the beginning and end of a recording in cDvbPlayer for
  devices with large buffers (thanks to Reinhard Nissl).
- Implemented cDeviceHook to allow plugins more control over which device can
  provide which transponder (thanks to Reinhard Nissl).
- Implemented cDevice::GetCurrentlyTunedTransponder() (thanks to Reinhard Nissl).
- Moved strictly necessary Makefile options into Make.global, which is included
  by all plugins (thanks to Paul Menzel). The Makefiles of existing plugins should be
  modified like this:

  ------------------------------------------------------------
  --- PLUGINS/src/hello/Makefile  2009/10/18 14:00:07      2.1
  +++ PLUGINS/src/hello/Makefile  2010/02/06 14:50:03      2.2
  @@ -18,7 +18,7 @@
   ### The C++ compiler and options:

   CXX      ?= g++
  -CXXFLAGS ?= -fPIC -g -O2 -Wall -Woverloaded-virtual -Wno-parentheses
  +CXXFLAGS ?= -g -O2 -Wall -Woverloaded-virtual -Wno-parentheses

   ### The directory environment:

  @@ -26,6 +26,10 @@
   LIBDIR = ../../lib
   TMPDIR = /tmp

  +### Make sure that necessary options are included:
  +
  +include $(VDRDIR)/Make.global
  +
   ### Allow user defined options to overwrite defaults:

   -include $(VDRDIR)/Make.config
  ------------------------------------------------------------
- Added device definitions to the diseqc.conf file format, so that certain satellite
  positions can be limited to a given list of devices.
  This obsoletes the SOURCECAPS patch.
- Keeping subtitles visible when pausing replay (thanks to Rolf Ahrenberg).
- Fixed adding new transponders in case there is only a single channel in the
  channel list (reported by Halim Sahin).
- The file name in the "Timers" menu now shows only the base name of the recording
  without the folder path (if any). Otherwise with long folder paths the actual
  recording name was not visible at all.
- Updated the Romanian OSD texts (thanks to Lucian Muresan).
- Exported some libsi functions (thanks to Lucian Muresan).
- Improved scalability of the default skins.
- Fixed the German translation of "Folder name must not contain '%c'!" (thanks to
  Frank Schmirler).
- Updated the Estonian OSD texts (thanks to Arthur Konovalov).
- Plugins can now define new sources. In order to implement this, the following
  changes were made:
  + The transponder parameter string is no longer interpreted by cChannel, but rather
    stored as is and used only by the respective device. That way plugins can use a
    channel's parameter string to store arbitrary data (see vdr.5).
  + The new class cSourceParam can be used by plugins to define new sources, and to
    implement OSD items that will be used in the channel editor for editing the source
    specific parameters of a channel (see dvbdevice.c for an example of how this is
    done for the default DVB devices).
  + Purely numerical values are no longer accepted in the 'source' parameter of a
    channel.
  This obsoletes the PLUGINPARAM patch.
- Updated the Lithuanian OSD texts (thanks to Valdemaras Pipiras).
- cSafeFile::Close() now flushes the file (suggested by Stephan Austermühle).
- The option "Setup/DVB/Use Dolby Digital" now only controls whether Dolby Digital
  tracks appear in the "Audio" menu. Dolby Digital is always recorded.
  This obsoletes the DOLBYINREC patch.
2010-02-28 16:07:00 +01:00

300 lines
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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 2.5 2010/02/16 15:37:05 kls Exp $
*/
#include "nit.h"
#include <linux/dvb/frontend.h>
#include "channels.h"
#include "dvbdevice.h"
#include "eitscan.h"
#include "libsi/section.h"
#include "libsi/descriptor.h"
#include "tools.h"
cNitFilter::cNitFilter(void)
{
numNits = 0;
networkId = 0;
Set(0x10, 0x40); // NIT
}
void cNitFilter::SetStatus(bool On)
{
cFilter::SetStatus(On);
numNits = 0;
networkId = 0;
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;
// 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++;
}
}
}
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))
return;
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;
}
}
else
NumFrequencies = 1;
}
delete fld;
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()]);
dtp.SetSystem(sd->getModulationSystem() ? SYS_DVBS2 : SYS_DVBS);
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;
}
if (Setup.UpdateChannels >= 5) {
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()) {
int transponder = Channel->Transponder();
found = true;
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())) // only modify channels if we're actually receiving this transponder
Channel->SetTransponderData(Source, Frequency, SymbolRate, dtp.ToString('S'));
}
}
if (!found) {
for (int n = 0; n < NumFrequencies; n++) {
cChannel *Channel = new cChannel;
Channel->SetId(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::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;
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;
}
if (Setup.UpdateChannels >= 5) {
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()) {
int transponder = Channel->Transponder();
found = true;
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())) // only modify channels if we're actually receiving this transponder
Channel->SetTransponderData(Source, Frequency, SymbolRate, dtp.ToString('C'));
}
}
if (!found) {
for (int n = 0; n < NumFrequencies; n++) {
cChannel *Channel = new cChannel;
Channel->SetId(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, 0, 0, 0, 0, 0 };
dtp.SetBandwidth(Bandwidths[sd->getBandwidth()]);
static int Constellations[] = { QPSK, QAM_16, QAM_64, QAM_AUTO };
dtp.SetModulation(Constellations[sd->getConstellation()]);
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_AUTO, 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;
}
if (Setup.UpdateChannels >= 5) {
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()) {
int transponder = Channel->Transponder();
found = true;
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())) // only modify channels if we're actually receiving this transponder
Channel->SetTransponderData(Source, Frequency, 0, dtp.ToString('T'));
}
}
if (!found) {
for (int n = 0; n < NumFrequencies; n++) {
cChannel *Channel = new cChannel;
Channel->SetId(ts.getOriginalNetworkId(), ts.getTransportStreamId(), 0, 0);
if (Channel->SetTransponderData(Source, Frequencies[n], 0, dtp.ToString('T')))
EITScanner.AddTransponder(Channel);
else
delete Channel;
}
}
}
}
break;
default: ;
}
delete d;
}
}
Channels.Unlock();
}
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