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vdr/eit.c
Klaus Schmidinger 948c370a29 Version 1.4.3-1 
- The function cThread::Cancel() now only sets 'running' to false and does not
  actually kill the thread if the special value -1 is given (suggested by Udo Richter).
- Changed the I18nNormalizeLanguageCode() check to also allow blanks (and all other
  printable characters) in the language codes (thanks to Boguslaw Juza for reporting
  that there are stations that use blanks in these codes). Blanks are replaced with
  underlines, so that all parts of VDR that rely on language codes to be one word
  (without blanks) work as expected.
- Now clearing an event's Title, ShortText and Description if there is no
  ShortEventDescriptor or ExtendedEventDescriptor, respectively (thanks to Boguslaw
  Juza for reporting that events without an ExtendedEventDescriptor may get
  duplicate information in their ShortText through the EPG bugfixes in case they
  are received again).
- Fixed handling video directory updates in case an other process has touched the
  .update file after the last NeedsUpdate() check (thanks to Petri Hintukainen).
- Fixed handling language codes and descriptions of recorded audio tracks on channels
  with multiple tracks where not all of them appear in the event data (reported by
  Boguslaw Juza).
2006-10-08 18:00:00 +02:00

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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 1.121 2006/10/07 12:32:24 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, 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;
tChannelID channelID(Source, getOriginalNetworkId(), getTransportStreamId(), getServiceId());
cChannel *channel = Channels.GetByChannelID(channelID, true);
if (!channel)
return; // only collect data for known channels
cSchedule *pSchedule = (cSchedule *)Schedules->GetSchedule(channel, true);
bool Empty = true;
bool Modified = false;
bool HasExternalData = false;
time_t SegmentStart = 0;
time_t SegmentEnd = 0;
SI::EIT::Event SiEitEvent;
for (SI::Loop::Iterator it; eventLoop.getNext(SiEitEvent, it); ) {
bool ExternalData = false;
// 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 (SiEitEvent.getStartTime() == 0 || SiEitEvent.getStartTime() > 0 && SiEitEvent.getDuration() == 0)
continue;
Empty = false;
if (!SegmentStart)
SegmentStart = SiEitEvent.getStartTime();
SegmentEnd = SiEitEvent.getStartTime() + SiEitEvent.getDuration();
cEvent *newEvent = NULL;
cEvent *rEvent = NULL;
cEvent *pEvent = (cEvent *)pSchedule->GetEvent(SiEitEvent.getEventId(), SiEitEvent.getStartTime());
if (!pEvent) {
if (OnlyRunningStatus)
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());
if (!pEvent)
continue;
}
else {
// We have found an existing event, either through its event ID or its start time.
pEvent->SetSeen();
// If the existing event has a zero table ID it was defined externally and shall
// not be overwritten.
if (pEvent->TableID() == 0x00) {
if (pEvent->Version() == getVersionNumber())
continue;
HasExternalData = ExternalData = true;
}
// If the new event has a higher table ID, let's skip it.
// The lower the table ID, the more "current" the information.
else 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.
else if (Tid == pEvent->TableID() && pEvent->Version() == getVersionNumber())
continue;
}
if (!ExternalData) {
pEvent->SetEventID(SiEitEvent.getEventId()); // unfortunately some stations use different event ids for the same event in different tables :-(
pEvent->SetTableID(Tid);
pEvent->SetStartTime(SiEitEvent.getStartTime());
pEvent->SetDuration(SiEitEvent.getDuration());
}
if (newEvent)
pSchedule->AddEvent(newEvent);
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)
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)); ) {
if (ExternalData && d->getDescriptorTag() != SI::ComponentDescriptorTag) {
delete d;
continue;
}
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:
break;
case SI::ParentalRatingDescriptorTag:
break;
case SI::PDCDescriptorTag: {
SI::PDCDescriptor *pd = (SI::PDCDescriptor *)d;
time_t now = time(NULL);
struct tm tm_r;
struct tm t = *localtime_r(&now, &tm_r); // this initializes the time zone in 't'
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);
pEvent->SetVps(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;
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) {
char linkName[ld->privateData.getLength() + 1];
strn0cpy(linkName, (const char *)ld->privateData.getData(), sizeof(linkName));
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) {
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));
}
}
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 <= 2 && Type != 0) {
if (!Components)
Components = new cComponents;
char buffer[256];
Components->SetComponent(Components->NumComponents(), cd->getStreamContent(), cd->getComponentType(), I18nNormalizeLanguageCode(cd->languageCode), cd->description.getText(buffer, sizeof(buffer)));
}
}
break;
default: ;
}
delete d;
}
if (!rEvent) {
if (ShortEventDescriptor) {
char buffer[256];
pEvent->SetTitle(ShortEventDescriptor->name.getText(buffer, sizeof(buffer)));
pEvent->SetShortText(ShortEventDescriptor->text.getText(buffer, sizeof(buffer)));
}
else {
pEvent->SetTitle(NULL);
pEvent->SetShortText(NULL);
}
if (ExtendedEventDescriptors) {
char buffer[ExtendedEventDescriptors->getMaximumTextLength(": ") + 1];
pEvent->SetDescription(ExtendedEventDescriptors->getText(buffer, sizeof(buffer), ": "));
}
else
pEvent->SetDescription(NULL);
}
delete ExtendedEventDescriptors;
delete ShortEventDescriptor;
pEvent->SetComponents(Components);
pEvent->FixEpgBugs();
if (LinkChannels)
channel->SetLinkChannels(LinkChannels);
Modified = true;
}
if (Empty && Tid == 0x4E && getSectionNumber() == 0)
// ETR 211: an empty entry in section 0 of table 0x4E means there is currently no event running
pSchedule->ClrRunningStatus(channel);
if (Tid == 0x4E)
pSchedule->SetPresentSeen();
if (OnlyRunningStatus)
return;
if (Modified) {
pSchedule->Sort();
if (!HasExternalData)
pSchedule->DropOutdated(SegmentStart, SegmentEnd, Tid, getVersionNumber());
Schedules->SetModified(pSchedule);
}
}
// --- cTDT ------------------------------------------------------------------
class cTDT : public SI::TDT {
private:
static cMutex mutex;
static int lastDiff;
public:
cTDT(const u_char *Data);
};
cMutex cTDT::mutex;
int cTDT::lastDiff = 0;
cTDT::cTDT(const u_char *Data)
:SI::TDT(Data, false)
{
CheckParse();
time_t sattim = getTime();
time_t loctim = time(NULL);
int diff = abs(sattim - loctim);
if (diff > 2) {
mutex.Lock();
if (abs(diff - lastDiff) < 3) {
isyslog("System Time = %s (%ld)", *TimeToString(loctim), loctim);
isyslog("Local Time = %s (%ld)", *TimeToString(sattim), sattim);
if (stime(&sattim) < 0)
esyslog("ERROR while setting system time: %m");
}
lastDiff = diff;
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);
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.TimeTransponder && ISTRANSPONDER(Transponder(), Setup.TimeTransponder))
cTDT TDT(Data);
}
break;
}
}
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