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/*
* sdt.c: SDT section filter
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: sdt.c 1.13 2004/10/31 12:10:20 kls Exp $
*/
#include "sdt.h"
#include "channels.h"
#include "config.h"
#include "libsi/section.h"
#include "libsi/descriptor.h"
// --- cSdtFilter ------------------------------------------------------------
cSdtFilter::cSdtFilter(cPatFilter *PatFilter)
{
patFilter = PatFilter;
Set(0x11, 0x42); // SDT
}
void cSdtFilter::SetStatus(bool On)
{
cFilter::SetStatus(On);
sectionSyncer.Reset();
}
void cSdtFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length)
{
if (!(Source() && Transponder()))
return;
SI::SDT sdt(Data, false);
if (!sdt.CheckCRCAndParse())
return;
if (!sectionSyncer.Sync(sdt.getVersionNumber(), sdt.getSectionNumber(), sdt.getLastSectionNumber()))
return;
if (!Channels.Lock(true, 10))
return;
SI::SDT::Service SiSdtService;
for (SI::Loop::Iterator it; sdt.serviceLoop.getNext(SiSdtService, it); ) {
cChannel *channel = Channels.GetByChannelID(tChannelID(Source(), sdt.getOriginalNetworkId(), sdt.getTransportStreamId(), SiSdtService.getServiceId()));
if (!channel)
channel = Channels.GetByChannelID(tChannelID(Source(), 0, Transponder(), SiSdtService.getServiceId()));
cLinkChannels *LinkChannels = NULL;
SI::Descriptor *d;
for (SI::Loop::Iterator it2; (d = SiSdtService.serviceDescriptors.getNext(it2)); ) {
switch (d->getDescriptorTag()) {
case SI::ServiceDescriptorTag: {
SI::ServiceDescriptor *sd = (SI::ServiceDescriptor *)d;
switch (sd->getServiceType()) {
case 0x01: // digital television service
case 0x02: // digital radio sound service
case 0x04: // NVOD reference service
case 0x05: // NVOD time-shifted service
{
char NameBuf[1024];
char ShortNameBuf[1024];
char ProviderNameBuf[1024];
sd->serviceName.getText(NameBuf, ShortNameBuf, sizeof(NameBuf), sizeof(ShortNameBuf));
char *pn = compactspace(NameBuf);
char *ps = compactspace(ShortNameBuf);
sd->providerName.getText(ProviderNameBuf, sizeof(ProviderNameBuf));
char *pp = compactspace(ProviderNameBuf);
if (channel) {
channel->SetId(sdt.getOriginalNetworkId(), sdt.getTransportStreamId(), SiSdtService.getServiceId());
if (Setup.UpdateChannels >= 1)
channel->SetName(pn, ps, pp);
// Using SiSdtService.getFreeCaMode() is no good, because some
// tv stations set this flag even for non-encrypted channels :-(
// The special value 0xFFFF was supposed to mean "unknown encryption"
// and would have been overwritten with real CA values later:
// channel->SetCa(SiSdtService.getFreeCaMode() ? 0xFFFF : 0);
}
else if (*pn && Setup.UpdateChannels >= 3) {
channel = Channels.NewChannel(Channel(), pn, ps, pp, sdt.getOriginalNetworkId(), sdt.getTransportStreamId(), SiSdtService.getServiceId());
patFilter->Trigger();
}
}
}
}
break;
// Using the CaIdentifierDescriptor is no good, because some tv stations
// just don't use it. The actual CA values are collected in pat.c:
/*
case SI::CaIdentifierDescriptorTag: {
SI::CaIdentifierDescriptor *cid = (SI::CaIdentifierDescriptor *)d;
if (channel) {
for (SI::Loop::Iterator it; cid->identifiers.hasNext(it); )
channel->SetCa(cid->identifiers.getNext(it));
}
}
break;
*/
case SI::NVODReferenceDescriptorTag: {
SI::NVODReferenceDescriptor *nrd = (SI::NVODReferenceDescriptor *)d;
SI::NVODReferenceDescriptor::Service Service;
for (SI::Loop::Iterator it; nrd->serviceLoop.getNext(Service, it); ) {
cChannel *link = Channels.GetByChannelID(tChannelID(Source(), Service.getOriginalNetworkId(), Service.getTransportStream(), Service.getServiceId()));
if (!link && Setup.UpdateChannels >= 3) {
link = Channels.NewChannel(Channel(), "NVOD", "", "", Service.getOriginalNetworkId(), Service.getTransportStream(), Service.getServiceId());
patFilter->Trigger();
}
if (link) {
if (!LinkChannels)
LinkChannels = new cLinkChannels;
LinkChannels->Add(new cLinkChannel(link));
}
}
}
break;
default: ;
}
delete d;
}
if (LinkChannels) {
if (channel)
channel->SetLinkChannels(LinkChannels);
else
delete LinkChannels;
}
}
Channels.Unlock();
}
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