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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 1.2 2004/01/05 11:40:24 kls Exp $
*/
#include "sdt.h"
#include "channels.h"
#include "config.h"
#include "libsi/section.h"
#include "libsi/descriptor.h"
// --- cSDT ------------------------------------------------------------------
class cSDT : public SI::SDT {
public:
cSDT(int Source, int Transponder, uchar &lastSdtVersion, cPatFilter *PatFilter, const u_char *Data);
};
cSDT::cSDT(int Source, int Transponder, uchar &lastSdtVersion, cPatFilter *PatFilter, const u_char *Data)
:SI::SDT(Data, false)
{
if (!CheckCRCAndParse())
return;
if (getVersionNumber() == lastSdtVersion)
return;
if (!Channels.Lock(true, 10))
return;
lastSdtVersion = getVersionNumber();
SI::SDT::Service SiSdtService;
for (SI::Loop::Iterator it; serviceLoop.hasNext(it); ) {
SiSdtService = serviceLoop.getNext(it);
cChannel *Channel = Channels.GetByChannelID(tChannelID(Source, getOriginalNetworkId(), getTransportStreamId(), SiSdtService.getServiceId()));
if (!Channel)
Channel = Channels.GetByChannelID(tChannelID(Source, 0, Transponder, SiSdtService.getServiceId()));
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
//XXX TODO case 0x02: // digital radio sound service
//XXX TODO case 0x04: // NVOD reference service
//XXX TODO case 0x05: // NVOD time-shifted service
{
char buffer[1024];
char *p = sd->serviceName.getText(buffer);
char NameBuf[1024];
char ShortNameBuf[1024];
char *pn = NameBuf;
char *ps = ShortNameBuf;
int IsShortName = 0;
while (*p) {
if ((uchar)*p == 0x86)
IsShortName++;
else if ((uchar)*p == 0x87)
IsShortName--;
else {
*pn++ = *p;
if (IsShortName)
*ps++ = *p;
}
p++;
}
*pn = *ps = 0;
pn = NameBuf;
if (*NameBuf && *ShortNameBuf) {
*ps++ = ',';
strcpy(ps, NameBuf);
pn = ShortNameBuf;
}
if (Channel) {
Channel->SetId(getOriginalNetworkId(), getTransportStreamId(), SiSdtService.getServiceId());
if (Setup.UpdateChannels >= 1)
Channel->SetName(pn);
// 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(Source, Transponder, pn, getOriginalNetworkId(), 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;
for (SI::Loop::Iterator it; nrd->serviceLoop.hasNext(it); ) {
SI::NVODReferenceDescriptor::Service Service = nrd->serviceLoop.getNext(it);
//printf(" %04X-%04X-%04X\n", Service.getOriginalNetworkId(), Service.getTransportStream(), Service.getServiceId());//XXX TODO
}
}
break;
default: ;
}
delete d;
}
}
Channels.Unlock();
}
// --- cSdtFilter ------------------------------------------------------------
cSdtFilter::cSdtFilter(cPatFilter *PatFilter)
{
lastSdtVersion = 0xFF;
patFilter = PatFilter;
Set(0x11, 0x42); // SDT
}
void cSdtFilter::SetStatus(bool On)
{
cFilter::SetStatus(On);
lastSdtVersion = 0xFF;
}
void cSdtFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length)
{
if (Source() && Transponder())
cSDT SDT(Source(), Transponder(), lastSdtVersion, patFilter, Data);
}
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