/* * eit.c: EIT section filter * * See the main source file 'vdr.c' for copyright information and * how to reach the author. * * Original version (as used in VDR before 1.3.0) written by * Robert Schneider and Rolf Hakenes . * Adapted to 'libsi' for VDR 1.3.0 by Marcel Wiesweg . * * $Id: eit.c 2.23.1.1 2013/10/12 11:24:51 kls Exp $ */ #include "eit.h" #include #include "epg.h" #include "i18n.h" #include "libsi/section.h" #include "libsi/descriptor.h" #define VALID_TIME (31536000 * 2) // two years // --- cEIT ------------------------------------------------------------------ class cEIT : public SI::EIT { public: cEIT(cSchedules *Schedules, int Source, u_char Tid, const u_char *Data, bool OnlyRunningStatus = false); }; cEIT::cEIT(cSchedules *Schedules, int Source, u_char Tid, const u_char *Data, bool OnlyRunningStatus) :SI::EIT(Data, false) { if (!CheckCRCAndParse()) return; time_t Now = time(NULL); if (Now < VALID_TIME) return; // we need the current time for handling PDC descriptors if (!Channels.Lock(false, 10)) return; tChannelID channelID(Source, getOriginalNetworkId(), getTransportStreamId(), getServiceId()); cChannel *channel = Channels.GetByChannelID(channelID, true); if (!channel || EpgHandlers.IgnoreChannel(channel)) { Channels.Unlock(); return; } bool handledExternally = EpgHandlers.HandledExternally(channel); cSchedule *pSchedule = (cSchedule *)Schedules->GetSchedule(channel, true); bool Empty = true; bool Modified = false; time_t SegmentStart = 0; time_t SegmentEnd = 0; struct tm tm_r; struct tm t = *localtime_r(&Now, &tm_r); // this initializes the time zone in 't' SI::EIT::Event SiEitEvent; for (SI::Loop::Iterator it; eventLoop.getNext(SiEitEvent, it); ) { if (EpgHandlers.HandleEitEvent(pSchedule, &SiEitEvent, Tid, getVersionNumber())) continue; // an EPG handler has done all of the processing time_t StartTime = SiEitEvent.getStartTime(); int Duration = SiEitEvent.getDuration(); // Drop bogus events - but keep NVOD reference events, where all bits of the start time field are set to 1, resulting in a negative number. if (StartTime == 0 || StartTime > 0 && Duration == 0) continue; Empty = false; if (!SegmentStart) SegmentStart = StartTime; SegmentEnd = StartTime + Duration; cEvent *newEvent = NULL; cEvent *rEvent = NULL; cEvent *pEvent = (cEvent *)pSchedule->GetEvent(SiEitEvent.getEventId(), StartTime); if (!pEvent || handledExternally) { if (OnlyRunningStatus) continue; if (handledExternally && !EpgHandlers.IsUpdate(SiEitEvent.getEventId(), StartTime, Tid, getVersionNumber())) continue; // If we don't have that event yet, we create a new one. // Otherwise we copy the information into the existing event anyway, because the data might have changed. pEvent = newEvent = new cEvent(SiEitEvent.getEventId()); newEvent->SetStartTime(StartTime); newEvent->SetDuration(Duration); if (!handledExternally) pSchedule->AddEvent(newEvent); } else { // We have found an existing event, either through its event ID or its start time. pEvent->SetSeen(); uchar TableID = max(pEvent->TableID(), uchar(0x4E)); // for backwards compatibility, table ids less than 0x4E are treated as if they were "present" // If the new event has a higher table ID, let's skip it. // The lower the table ID, the more "current" the information. if (Tid > TableID) continue; // If the new event comes from the same table and has the same version number // as the existing one, let's skip it to avoid unnecessary work. // Unfortunately some stations (like, e.g. "Premiere") broadcast their EPG data on several transponders (like // the actual Premiere transponder and the Sat.1/Pro7 transponder), but use different version numbers on // each of them :-( So if one DVB card is tuned to the Premiere transponder, while an other one is tuned // to the Sat.1/Pro7 transponder, events will keep toggling because of the bogus version numbers. else if (Tid == TableID && pEvent->Version() == getVersionNumber()) continue; EpgHandlers.SetEventID(pEvent, SiEitEvent.getEventId()); // unfortunately some stations use different event ids for the same event in different tables :-( EpgHandlers.SetStartTime(pEvent, StartTime); EpgHandlers.SetDuration(pEvent, Duration); } if (pEvent->TableID() > 0x4E) // for backwards compatibility, table ids less than 0x4E are never overwritten pEvent->SetTableID(Tid); if (Tid == 0x4E) { // we trust only the present/following info on the actual TS if (SiEitEvent.getRunningStatus() >= SI::RunningStatusNotRunning) pSchedule->SetRunningStatus(pEvent, SiEitEvent.getRunningStatus(), channel); } if (OnlyRunningStatus) { pEvent->SetVersion(0xFF); // we have already changed the table id above, so set the version to an invalid value to make sure the next full run will be executed continue; // do this before setting the version, so that the full update can be done later } pEvent->SetVersion(getVersionNumber()); int LanguagePreferenceShort = -1; int LanguagePreferenceExt = -1; bool UseExtendedEventDescriptor = false; SI::Descriptor *d; SI::ExtendedEventDescriptors *ExtendedEventDescriptors = NULL; SI::ShortEventDescriptor *ShortEventDescriptor = NULL; cLinkChannels *LinkChannels = NULL; cComponents *Components = NULL; for (SI::Loop::Iterator it2; (d = SiEitEvent.eventDescriptors.getNext(it2)); ) { switch (d->getDescriptorTag()) { case SI::ExtendedEventDescriptorTag: { SI::ExtendedEventDescriptor *eed = (SI::ExtendedEventDescriptor *)d; if (I18nIsPreferredLanguage(Setup.EPGLanguages, eed->languageCode, LanguagePreferenceExt) || !ExtendedEventDescriptors) { delete ExtendedEventDescriptors; ExtendedEventDescriptors = new SI::ExtendedEventDescriptors; UseExtendedEventDescriptor = true; } if (UseExtendedEventDescriptor) { ExtendedEventDescriptors->Add(eed); d = NULL; // so that it is not deleted } if (eed->getDescriptorNumber() == eed->getLastDescriptorNumber()) UseExtendedEventDescriptor = false; } break; case SI::ShortEventDescriptorTag: { SI::ShortEventDescriptor *sed = (SI::ShortEventDescriptor *)d; if (I18nIsPreferredLanguage(Setup.EPGLanguages, sed->languageCode, LanguagePreferenceShort) || !ShortEventDescriptor) { delete ShortEventDescriptor; ShortEventDescriptor = sed; d = NULL; // so that it is not deleted } } break; case SI::ContentDescriptorTag: { SI::ContentDescriptor *cd = (SI::ContentDescriptor *)d; SI::ContentDescriptor::Nibble Nibble; int NumContents = 0; uchar Contents[MaxEventContents] = { 0 }; for (SI::Loop::Iterator it3; cd->nibbleLoop.getNext(Nibble, it3); ) { if (NumContents < MaxEventContents) { Contents[NumContents] = ((Nibble.getContentNibbleLevel1() & 0xF) << 4) | (Nibble.getContentNibbleLevel2() & 0xF); NumContents++; } } EpgHandlers.SetContents(pEvent, Contents); } break; case SI::ParentalRatingDescriptorTag: { int LanguagePreferenceRating = -1; SI::ParentalRatingDescriptor *prd = (SI::ParentalRatingDescriptor *)d; SI::ParentalRatingDescriptor::Rating Rating; for (SI::Loop::Iterator it3; prd->ratingLoop.getNext(Rating, it3); ) { if (I18nIsPreferredLanguage(Setup.EPGLanguages, Rating.languageCode, LanguagePreferenceRating)) { int ParentalRating = (Rating.getRating() & 0xFF); switch (ParentalRating) { // values defined by the DVB standard (minimum age = rating + 3 years): case 0x01 ... 0x0F: ParentalRating += 3; break; // values defined by broadcaster CSAT (now why didn't they just use 0x07, 0x09 and 0x0D?): case 0x11: ParentalRating = 10; break; case 0x12: ParentalRating = 12; break; case 0x13: ParentalRating = 16; break; default: ParentalRating = 0; } EpgHandlers.SetParentalRating(pEvent, ParentalRating); } } } break; case SI::PDCDescriptorTag: { SI::PDCDescriptor *pd = (SI::PDCDescriptor *)d; t.tm_isdst = -1; // makes sure mktime() will determine the correct DST setting int month = t.tm_mon; t.tm_mon = pd->getMonth() - 1; t.tm_mday = pd->getDay(); t.tm_hour = pd->getHour(); t.tm_min = pd->getMinute(); t.tm_sec = 0; if (month == 11 && t.tm_mon == 0) // current month is dec, but event is in jan t.tm_year++; else if (month == 0 && t.tm_mon == 11) // current month is jan, but event is in dec t.tm_year--; time_t vps = mktime(&t); EpgHandlers.SetVps(pEvent, vps); } break; case SI::TimeShiftedEventDescriptorTag: { SI::TimeShiftedEventDescriptor *tsed = (SI::TimeShiftedEventDescriptor *)d; cSchedule *rSchedule = (cSchedule *)Schedules->GetSchedule(tChannelID(Source, channel->Nid(), channel->Tid(), tsed->getReferenceServiceId())); if (!rSchedule) break; rEvent = (cEvent *)rSchedule->GetEvent(tsed->getReferenceEventId()); if (!rEvent) break; EpgHandlers.SetTitle(pEvent, rEvent->Title()); EpgHandlers.SetShortText(pEvent, rEvent->ShortText()); EpgHandlers.SetDescription(pEvent, rEvent->Description()); } break; case SI::LinkageDescriptorTag: { SI::LinkageDescriptor *ld = (SI::LinkageDescriptor *)d; tChannelID linkID(Source, ld->getOriginalNetworkId(), ld->getTransportStreamId(), ld->getServiceId()); if (ld->getLinkageType() == 0xB0) { // Premiere World bool hit = StartTime <= Now && Now < StartTime + Duration; if (hit) { char linkName[ld->privateData.getLength() + 1]; strn0cpy(linkName, (const char *)ld->privateData.getData(), sizeof(linkName)); // TODO is there a standard way to determine the character set of this string? cChannel *link = Channels.GetByChannelID(linkID); if (link != channel) { // only link to other channels, not the same one //fprintf(stderr, "Linkage %s %4d %4d %5d %5d %5d %5d %02X '%s'\n", hit ? "*" : "", channel->Number(), link ? link->Number() : -1, SiEitEvent.getEventId(), ld->getOriginalNetworkId(), ld->getTransportStreamId(), ld->getServiceId(), ld->getLinkageType(), linkName);//XXX if (link) { if (Setup.UpdateChannels == 1 || Setup.UpdateChannels >= 3) link->SetName(linkName, "", ""); } else if (Setup.UpdateChannels >= 4) { cChannel *transponder = channel; if (channel->Tid() != ld->getTransportStreamId()) transponder = Channels.GetByTransponderID(linkID); link = Channels.NewChannel(transponder, linkName, "", "", ld->getOriginalNetworkId(), ld->getTransportStreamId(), ld->getServiceId()); //XXX patFilter->Trigger(); } if (link) { if (!LinkChannels) LinkChannels = new cLinkChannels; LinkChannels->Add(new cLinkChannel(link)); } } else channel->SetPortalName(linkName); } } } break; case SI::ComponentDescriptorTag: { SI::ComponentDescriptor *cd = (SI::ComponentDescriptor *)d; uchar Stream = cd->getStreamContent(); uchar Type = cd->getComponentType(); if (1 <= Stream && Stream <= 6 && Type != 0) { // 1=MPEG2-video, 2=MPEG1-audio, 3=subtitles, 4=AC3-audio, 5=H.264-video, 6=HEAAC-audio if (!Components) Components = new cComponents; char buffer[Utf8BufSize(256)]; Components->SetComponent(Components->NumComponents(), Stream, Type, I18nNormalizeLanguageCode(cd->languageCode), cd->description.getText(buffer, sizeof(buffer))); } } break; default: ; } delete d; } if (!rEvent) { if (ShortEventDescriptor) { char buffer[Utf8BufSize(256)]; EpgHandlers.SetTitle(pEvent, ShortEventDescriptor->name.getText(buffer, sizeof(buffer))); EpgHandlers.SetShortText(pEvent, ShortEventDescriptor->text.getText(buffer, sizeof(buffer))); } else { EpgHandlers.SetTitle(pEvent, NULL); EpgHandlers.SetShortText(pEvent, NULL); } if (ExtendedEventDescriptors) { char buffer[Utf8BufSize(ExtendedEventDescriptors->getMaximumTextLength(": ")) + 1]; EpgHandlers.SetDescription(pEvent, ExtendedEventDescriptors->getText(buffer, sizeof(buffer), ": ")); } else EpgHandlers.SetDescription(pEvent, NULL); } delete ExtendedEventDescriptors; delete ShortEventDescriptor; EpgHandlers.SetComponents(pEvent, Components); EpgHandlers.FixEpgBugs(pEvent); if (LinkChannels) channel->SetLinkChannels(LinkChannels); Modified = true; EpgHandlers.HandleEvent(pEvent); if (handledExternally) delete pEvent; } if (Tid == 0x4E) { if (Empty && getSectionNumber() == 0) // ETR 211: an empty entry in section 0 of table 0x4E means there is currently no event running pSchedule->ClrRunningStatus(channel); pSchedule->SetPresentSeen(); } if (Modified && !OnlyRunningStatus) { EpgHandlers.SortSchedule(pSchedule); EpgHandlers.DropOutdated(pSchedule, SegmentStart, SegmentEnd, Tid, getVersionNumber()); Schedules->SetModified(pSchedule); } Channels.Unlock(); } // --- cTDT ------------------------------------------------------------------ #define MAX_TIME_DIFF 1 // number of seconds the local time may differ from dvb time before making any corrections #define MAX_ADJ_DIFF 10 // number of seconds the local time may differ from dvb time to allow smooth adjustment #define ADJ_DELTA 300 // number of seconds between calls for smooth time adjustment class cTDT : public SI::TDT { private: static cMutex mutex; static time_t lastAdj; public: cTDT(const u_char *Data); }; cMutex cTDT::mutex; time_t cTDT::lastAdj = 0; cTDT::cTDT(const u_char *Data) :SI::TDT(Data, false) { CheckParse(); time_t dvbtim = getTime(); time_t loctim = time(NULL); int diff = dvbtim - loctim; if (abs(diff) > MAX_TIME_DIFF) { mutex.Lock(); if (abs(diff) > MAX_ADJ_DIFF) { if (stime(&dvbtim) == 0) isyslog("system time changed from %s (%ld) to %s (%ld)", *TimeToString(loctim), loctim, *TimeToString(dvbtim), dvbtim); else esyslog("ERROR while setting system time: %m"); } else if (time(NULL) - lastAdj > ADJ_DELTA) { lastAdj = time(NULL); timeval delta; delta.tv_sec = diff; delta.tv_usec = 0; if (adjtime(&delta, NULL) == 0) isyslog("system time adjustment initiated from %s (%ld) to %s (%ld)", *TimeToString(loctim), loctim, *TimeToString(dvbtim), dvbtim); else esyslog("ERROR while adjusting system time: %m"); } mutex.Unlock(); } } // --- cEitFilter ------------------------------------------------------------ time_t cEitFilter::disableUntil = 0; cEitFilter::cEitFilter(void) { Set(0x12, 0x40, 0xC0); // event info now&next actual/other TS (0x4E/0x4F), future actual/other TS (0x5X/0x6X) Set(0x14, 0x70); // TDT } void cEitFilter::SetDisableUntil(time_t Time) { disableUntil = Time; } void cEitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length) { if (disableUntil) { if (time(NULL) > disableUntil) disableUntil = 0; else return; } switch (Pid) { case 0x12: { if (Tid >= 0x4E && Tid <= 0x6F) { cSchedulesLock SchedulesLock(true, 10); cSchedules *Schedules = (cSchedules *)cSchedules::Schedules(SchedulesLock); if (Schedules) cEIT EIT(Schedules, Source(), Tid, Data); else { // If we don't get a write lock, let's at least get a read lock, so // that we can set the running status and 'seen' timestamp (well, actually // with a read lock we shouldn't be doing that, but it's only integers that // get changed, so it should be ok) cSchedulesLock SchedulesLock; cSchedules *Schedules = (cSchedules *)cSchedules::Schedules(SchedulesLock); if (Schedules) cEIT EIT(Schedules, Source(), Tid, Data, true); } } } break; case 0x14: { if (Setup.SetSystemTime && Setup.TimeSource == Source() && Setup.TimeTransponder && ISTRANSPONDER(Transponder(), Setup.TimeTransponder)) cTDT TDT(Data); } break; default: ; } }