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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 1.83 2003/12/25 12:48:47 kls Exp $
*/
#include "eit.h"
#include "epg.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;
//XXX TODO use complete channel ID
cChannel *channel = Channels.GetByServiceID(Source, getServiceId());
if (!channel)
return; // only collect data for known channels
tChannelID channelID = channel->GetChannelID();
channelID.ClrRid();
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 ID 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;
pEvent->SetTableID(Tid);
}
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 comes from a table that belongs to an "other TS" and the existing
// one comes from an "actual TS" table, let's skip it.
#define ISACTUALTS(tid) (tid == 0x4E || (tid & 0x50) == 0x50)
if (!ISACTUALTS(Tid) && ISACTUALTS(pEvent->TableID()))
continue;
// If the new event comes from a "schedule" table and the existing one comes from
// a "present/following" table, let's skip it (the p/f table usually contains more
// information, like e.g. a description).
if ((Tid & 0x50) == 0x50 && pEvent->TableID() == 0x4E || (Tid & 0x60) == 0x60 && pEvent->TableID() == 0x4F)
continue;
// If both events come from the same "schedule" table and the new event's table id is larger than the
// existing one's, let's skip it (higher tids mean "farther in the future" and usually have less information).
if (((Tid & 0x50) == 0x50 || (Tid & 0x60) == 0x60) && (pEvent->TableID() & 0xF0) == (Tid & 0xF0) && (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 ot the bogus version numbers.
if (Tid == pEvent->TableID() && pEvent->Version() == getVersionNumber())
continue;
}
pEvent->SetVersion(getVersionNumber());
pEvent->SetTableID(Tid);
pEvent->SetEventID(SiEitEvent.getEventId()); // unfortunately some stations use different event ids for the same event in different tables :-(
SI::Descriptor *d;
SI::ExtendedEventDescriptors exGroup;
char text[256];
for (SI::Loop::Iterator it2; (d = SiEitEvent.eventDescriptors.getNext(it2)); ) {
switch (d->getDescriptorTag()) {
case SI::ExtendedEventDescriptorTag:
exGroup.Add((SI::ExtendedEventDescriptor *)d);
d = NULL; //so that it is not deleted
break;
case SI::ShortEventDescriptorTag: {
SI::ShortEventDescriptor *sed = (SI::ShortEventDescriptor *)d;
pEvent->SetTitle(sed->name.getText(text));
pEvent->SetShortText(sed->text.getText(text));
}
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;
default: ;
}
delete d;
}
if (!rEvent) {
char buffer[exGroup.getMaximumTextLength()];
pEvent->SetDescription(exGroup.getText(buffer));
}
pEvent->SetStartTime(SiEitEvent.getStartTime());
pEvent->SetDuration(SiEitEvent.getDuration());
pEvent->FixEpgBugs();
if (isPresentFollowing()) {
if (SiEitEvent.getRunningStatus() == SI::RunningStatusPausing || SiEitEvent.getRunningStatus() == SI::RunningStatusRunning)
pSchedule->SetPresentEvent(pEvent);
else if (SiEitEvent.getRunningStatus() == SI::RunningStatusStartsInAFewSeconds)
pSchedule->SetFollowingEvent(pEvent);
}
}
}
// --- 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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