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/*
* 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 <Robert.Schneider@web.de> and Rolf Hakenes <hakenes@hippomi.de>.
* Adapted to 'libsi' for VDR 1.3.0 by Marcel Wiesweg <marcel.wiesweg@gmx.de>.
*
* $Id: eit.c 1.87 2004/02/21 12:20:26 kls Exp $
*/
#include "eit.h"
#include "epg.h"
#include "i18n.h"
#include "libsi/section.h"
#include "libsi/descriptor.h"
// --- cEIT ------------------------------------------------------------------
class cEIT : public SI::EIT {
public:
cEIT(cSchedules *Schedules, int Source, u_char Tid, const u_char *Data);
};
cEIT::cEIT(cSchedules *Schedules, int Source, u_char Tid, const u_char *Data)
:SI::EIT(Data, false)
{
if (!CheckCRCAndParse())
return;
tChannelID channelID(Source, getOriginalNetworkId(), getTransportStreamId(), getServiceId());
cChannel *channel = Channels.GetByChannelID(channelID, true);
if (!channel)
return; // only collect data for known channels
cEvent *rEvent = NULL;
cSchedule *pSchedule = (cSchedule *)Schedules->GetSchedule(channelID);
if (!pSchedule) {
pSchedule = new cSchedule(channelID);
Schedules->Add(pSchedule);
}
SI::EIT::Event SiEitEvent;
for (SI::Loop::Iterator it; eventLoop.hasNext(it); ) {
SiEitEvent = eventLoop.getNext(it);
cEvent *pEvent = (cEvent *)pSchedule->GetEvent(SiEitEvent.getEventId(), SiEitEvent.getStartTime());
if (!pEvent) {
// 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 = pSchedule->AddEvent(new cEvent(channelID, SiEitEvent.getEventId()));
if (!pEvent)
continue;
}
else {
// We have found an existing event, either through its event ID or its start time.
// If the existing event has a zero table ID it was defined externally and shall
// not be overwritten.
if (pEvent->TableID() == 0x00)
continue;
// 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 > pEvent->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.
if (Tid == pEvent->TableID() && pEvent->Version() == getVersionNumber())
continue;
}
// XXX TODO log different (non-zero) event IDs for the same event???
pEvent->SetEventID(SiEitEvent.getEventId()); // unfortunately some stations use different event ids for the same event in different tables :-(
pEvent->SetTableID(Tid);
pEvent->SetVersion(getVersionNumber());
pEvent->SetStartTime(SiEitEvent.getStartTime());
pEvent->SetDuration(SiEitEvent.getDuration());
if (isPresentFollowing()) {
if (SiEitEvent.getRunningStatus() > SI::RunningStatusNotRunning)
pSchedule->SetRunningStatus(pEvent, SiEitEvent.getRunningStatus());
}
int LanguagePreferenceShort = -1;
int LanguagePreferenceExt = -1;
bool UseExtendedEventDescriptor = false;
SI::Descriptor *d;
SI::ExtendedEventDescriptors *ExtendedEventDescriptors = NULL;
SI::ShortEventDescriptor *ShortEventDescriptor = NULL;
cLinkChannels *LinkChannels = 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, I18nLanguageIndex(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, I18nLanguageIndex(sed->languageCode), LanguagePreferenceShort) || !ShortEventDescriptor) {
delete ShortEventDescriptor;
ShortEventDescriptor = sed;
d = NULL; // so that it is not deleted
}
}
break;
case SI::ContentDescriptorTag:
break;
case SI::ParentalRatingDescriptorTag:
break;
case SI::TimeShiftedEventDescriptorTag: {
SI::TimeShiftedEventDescriptor *tsed = (SI::TimeShiftedEventDescriptor *)d;
cSchedule *rSchedule = (cSchedule *)Schedules->GetSchedule(tChannelID(Source, 0, 0, tsed->getReferenceServiceId()));
if (!rSchedule)
break;
rEvent = (cEvent *)rSchedule->GetEvent(tsed->getReferenceEventId());
if (!rEvent)
break;
pEvent->SetTitle(rEvent->Title());
pEvent->SetShortText(rEvent->ShortText());
pEvent->SetDescription(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
time_t now = time(NULL);
bool hit = SiEitEvent.getStartTime() <= now && now < SiEitEvent.getStartTime() + SiEitEvent.getDuration();
if (hit) {
cChannel *link = Channels.GetByChannelID(linkID);
if (link != channel) { // only link to other channels, not the same one
char linkName[ld->privateData.getLength() + 1];
strn0cpy(linkName, (const char *)ld->privateData.getData(), sizeof(linkName));
//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)
link->SetName(linkName);
}
else if (Setup.UpdateChannels >= 3) {
link = Channels.NewChannel(channel, linkName, ld->getOriginalNetworkId(), ld->getTransportStreamId(), ld->getServiceId());
//XXX patFilter->Trigger();
}
if (link) {
if (!LinkChannels)
LinkChannels = new cLinkChannels;
LinkChannels->Add(new cLinkChannel(link));
}
}
}
}
}
break;
default: ;
}
delete d;
}
if (!rEvent) {
if (ShortEventDescriptor) {
char buffer[256];
pEvent->SetTitle(ShortEventDescriptor->name.getText(buffer));
pEvent->SetShortText(ShortEventDescriptor->text.getText(buffer));
}
if (ExtendedEventDescriptors) {
char buffer[ExtendedEventDescriptors->getMaximumTextLength()];
pEvent->SetDescription(ExtendedEventDescriptors->getText(buffer));
}
}
delete ExtendedEventDescriptors;
delete ShortEventDescriptor;
pEvent->FixEpgBugs();
if (LinkChannels)
channel->SetLinkChannels(LinkChannels);
}
}
// --- cTDT ------------------------------------------------------------------
class cTDT : public SI::TDT {
private:
static cMutex mutex;
public:
cTDT(const u_char *Data);
};
cMutex cTDT::mutex;
cTDT::cTDT(const u_char *Data)
:SI::TDT(Data, false)
{
CheckParse();
time_t sattim = getTime();
time_t loctim = time(NULL);
if (abs(sattim - loctim) > 2) {
mutex.Lock();
isyslog("System Time = %s (%ld)\n", ctime(&loctim), loctim);
isyslog("Local Time = %s (%ld)\n", ctime(&sattim), sattim);
if (stime(&sattim) < 0)
esyslog("ERROR while setting system time: %m");
mutex.Unlock();
}
}
// --- cEitFilter ------------------------------------------------------------
cEitFilter::cEitFilter(void)
{
Set(0x12, 0x4E, 0xFE); // event info, actual(0x4E)/other(0x4F) TS, present/following
Set(0x12, 0x50, 0xF0); // event info, actual TS, schedule(0x50)/schedule for future days(0x5X)
Set(0x12, 0x60, 0xF0); // event info, other TS, schedule(0x60)/schedule for future days(0x6X)
Set(0x14, 0x70); // TDT
}
void cEitFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length)
{
switch (Pid) {
case 0x12: {
cSchedulesLock SchedulesLock(true, 10);
cSchedules *Schedules = (cSchedules *)cSchedules::Schedules(SchedulesLock);
if (Schedules)
cEIT EIT(Schedules, Source(), Tid, Data);
}
break;
case 0x14: {
if (Setup.SetSystemTime && Setup.TimeTransponder && ISTRANSPONDER(Transponder(), Setup.TimeTransponder))
cTDT TDT(Data);
}
break;
}
}
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