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vdr/eit.c
Klaus Schmidinger 5117f35938 Version 1.7.26 
Original announce message:
VDR developer version 1.7.26 is now available at

       ftp://ftp.tvdr.de/vdr/Developer/vdr-1.7.26.tar.bz2

A 'diff' against the previous version is available at

       ftp://ftp.tvdr.de/vdr/Developer/vdr-1.7.25-1.7.26.diff

MD5 checksums:

eb57398e44935ecb0bfc532bdfead312  vdr-1.7.26.tar.bz2
62e0f39e2c53ec2b5abd3ebb0e00ce3d  vdr-1.7.25-1.7.26.diff

WARNING:
========

This is a developer version. Even though I use it in my productive
environment. I strongly recommend that you only use it under controlled
conditions and for testing and debugging.

From the HISTORY file:
- Now checking for NULL in cOsd::AddPixmap() (suggested by Christoph Haubrich).
- Fixed the German translation of "VDR will shut down in %s minutes" (thanks to
  Frank Neumann).
- The replay progress display is now turned on whenever a mark is toggled (not
  only when one is set).
- Toggling a mark now restarts the timeout of the replay progress display.
- Fixed a possible race condition with the SVDRP commands CLRE and PUTE, where
  EPG data from the transponder could be handled even though it shouldn't be
  handled for 10 seconds.
- Added some missing member initializations in cBitmap.
- Improved displaying the play mode in the ST:TNG skin.
- Made the ST:TNG skin the default in case the user selected skin is not available.
- Improved displaying signal strength and quality in the ST:TNG skin's channel
  display.
- Fixed switching devices to the transponders of VPS recordings in case there
  are only bonded devices. The cDevice's "avoid device" mechanism has been replaced
  by using "occupied".
- Fixed selecting devices for the EPG scan in case the primary device is bonded
  with an other one.
- Removed the calls to EITScanner.UsesDevice(this) from dvb[hs]ddevice.c, because
  the code following these calls is only executed if LiveView is true, which is
  never the case when the EITScanner switches to a channel.
- Removed the obsolete function cEITScanner::UsesDevice(). If a plugin has used this
  function to find out whether a call to its cStatus::ChannelSwitch() function was
  due to a live channel switch, it can use that function's new parameter LiveView.
  Any plugins that implement cStatus::ChannelSwitch() need to add the parameter
  'bool LiveView' to that function.
- Fixed parsing channel data in case the audio pid is 0. On channels that only
  broadcast Dolby Digital audio there were sometimes log entries like
  "changing pids of channel ... from ... to ..." with no apparent difference
  between the old and new set of pids.
- Fixed checking pids in case a channel has only Dolby Digital audio.
- The Green button in the "Edit timer" menu can now be used to toggle between single
  shot and repeating timers. This is the same as pressing '0' when the "Day" field
  is selected, but it works at any time (and is more obvious).
- Revoked "If the first event in a schedule has a table id of 0x00, any incoming EIT data for
  that schedule from the DVB stream will be completely ignored".
- Added a new plugin interface for implementing EPG handlers.
  + A plugin can implement an EPG handler by creating an object derived from
    cEpgHandler and implementing the necessary member functions.
  + The special handling of events with table id 0x00 has been dropped.
    For backwards compatibility EPG events with table ids lower than 0x4E will
    be treated as if they had a table id of 0x4E, and the new plugin 'epgtableid0'
    can be used to have them handled like in previous versions.
  + The default table id for a newly created cEvent has been changed to 0xFF,
    which is higher than any normal table id that is broadcast in the EIT data.
  See PLUGINS.html, section "Electronic Program Guide" for more information.
2012-03-11 18:00:38 +01:00

394 lines
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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 2.15 2012/03/10 14:43:52 kls Exp $
*/
#include "eit.h"
#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;
tChannelID channelID(Source, getOriginalNetworkId(), getTransportStreamId(), getServiceId());
cChannel *channel = Channels.GetByChannelID(channelID, true);
if (!channel)
return; // only collect data for known channels
if (EpgHandlers.IgnoreChannel(channel))
return;
cSchedule *pSchedule = (cSchedule *)Schedules->GetSchedule(channel, true);
bool Empty = true;
bool Modified = false;
time_t SegmentStart = 0;
time_t SegmentEnd = 0;
time_t Now = time(NULL);
struct tm tm_r;
struct tm t = *localtime_r(&Now, &tm_r); // this initializes the time zone in 't'
if (Now < VALID_TIME)
return; // we need the current time for handling PDC descriptors
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) {
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());
newEvent->SetStartTime(StartTime);
newEvent->SetDuration(Duration);
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;
pEvent->SetComponents(Components);
EpgHandlers.FixEpgBugs(pEvent);
if (LinkChannels)
channel->SetLinkChannels(LinkChannels);
Modified = true;
EpgHandlers.HandleEvent(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 (OnlyRunningStatus)
return;
if (Modified) {
EpgHandlers.SortSchedule(pSchedule);
EpgHandlers.DropOutdated(pSchedule, 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) {
if (stime(&sattim) == 0)
isyslog("system time changed from %s (%ld) to %s (%ld)", *TimeToString(loctim), loctim, *TimeToString(sattim), sattim);
else
esyslog("ERROR while setting system time: %m");
}
lastDiff = diff;
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)
if (Setup.SetSystemTime && Setup.TimeTransponder)
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.TimeTransponder && ISTRANSPONDER(Transponder(), Setup.TimeTransponder))
cTDT TDT(Data);
}
break;
default: ;
}
}
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