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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 4.3 2015/03/16 15:24:12 kls Exp $
*/
#include "sdt.h"
#include "channels.h"
#include "config.h"
#include "libsi/section.h"
#include "libsi/descriptor.h"
// Set to 'true' for debug output:
static bool DebugSdt = false;
#define dbgsdt(a...) if (DebugSdt) fprintf(stderr, a)
// --- cSdtFilter ------------------------------------------------------------
cSdtFilter::cSdtFilter(cPatFilter *PatFilter)
{
source = cSource::stNone;
patFilter = PatFilter;
Set(0x11, 0x42); // SDT
}
void cSdtFilter::SetStatus(bool On)
{
cMutexLock MutexLock(&mutex);
cFilter::SetStatus(On);
sectionSyncer.Reset();
if (!On)
source = cSource::stNone;
}
void cSdtFilter::Trigger(int Source)
{
cMutexLock MutexLock(&mutex);
source = Source;
}
void cSdtFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length)
{
cMutexLock MutexLock(&mutex);
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)) {
sectionSyncer.Reset(); // let's not miss any section of the SDT
return;
}
dbgsdt("SDT: %2d %2d %2d %s %d\n", sdt.getVersionNumber(), sdt.getSectionNumber(), sdt.getLastSectionNumber(), *cSource::ToString(source), Transponder());
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()));
if (channel)
channel->SetSeen();
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
case 0x16: // digital SD television service
case 0x19: // digital HD television service
{
char NameBuf[Utf8BufSize(1024)];
char ShortNameBuf[Utf8BufSize(1024)];
char ProviderNameBuf[Utf8BufSize(1024)];
sd->serviceName.getText(NameBuf, ShortNameBuf, sizeof(NameBuf), sizeof(ShortNameBuf));
char *pn = compactspace(NameBuf);
char *ps = compactspace(ShortNameBuf);
if (!*ps && cSource::IsCable(source)) {
// Some cable providers don't mark short channel names according to the
// standard, but rather go their own way and use "name>short name":
char *p = strchr(pn, '>'); // fix for UPC Wien
if (p && p > pn) {
*p++ = 0;
strcpy(ShortNameBuf, skipspace(p));
}
}
// Avoid ',' in short name (would cause trouble in channels.conf):
for (char *p = ShortNameBuf; *p; p++) {
if (*p == ',')
*p = '.';
}
sd->providerName.getText(ProviderNameBuf, sizeof(ProviderNameBuf));
char *pp = compactspace(ProviderNameBuf);
if (channel) {
channel->SetId(sdt.getOriginalNetworkId(), sdt.getTransportStreamId(), SiSdtService.getServiceId());
if (Setup.UpdateChannels == 1 || Setup.UpdateChannels >= 3)
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 >= 4) {
dbgsdt(" %5d %5d %5d %s/%s %d %s\n", sdt.getOriginalNetworkId(), sdt.getTransportStreamId(), SiSdtService.getServiceId(), *cSource::ToString(Channel()->Source()), *cSource::ToString(source), Channel()->Transponder(), pn);
channel = Channels.NewChannel(Channel(), pn, ps, pp, sdt.getOriginalNetworkId(), sdt.getTransportStreamId(), SiSdtService.getServiceId());
channel->SetSource(source); // in case this comes from a satellite with a slightly different position
patFilter->Trigger(SiSdtService.getServiceId());
}
}
default: ;
}
}
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 >= 4) {
link = Channels.NewChannel(Channel(), "NVOD", "", "", Service.getOriginalNetworkId(), Service.getTransportStream(), Service.getServiceId());
patFilter->Trigger(Service.getServiceId());
}
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;
}
}
if (sdt.getSectionNumber() == sdt.getLastSectionNumber()) {
if (Setup.UpdateChannels == 1 || Setup.UpdateChannels >= 3) {
Channels.MarkObsoleteChannels(source, sdt.getOriginalNetworkId(), sdt.getTransportStreamId());
if (source != Source())
Channels.MarkObsoleteChannels(Source(), sdt.getOriginalNetworkId(), sdt.getTransportStreamId());
}
}
Channels.Unlock();
}
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