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vdr/pat.c
Klaus Schmidinger 3df1b6d139 Version 1.7.25 
Original announce message:
VDR developer version 1.7.25 is now available at

       ftp://ftp.tvdr.de/vdr/Developer/vdr-1.7.25.tar.bz2

A 'diff' against the previous version is available at

       ftp://ftp.tvdr.de/vdr/Developer/vdr-1.7.24-1.7.25.diff

MD5 checksums:

a3fd482a3dd8027706d4f32a88c6bd13  vdr-1.7.25.tar.bz2
f34adcdc0cdab378431d8946872d6b59  vdr-1.7.24-1.7.25.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:
- The fps value for channels where it differs from the default is now set correctly
  when pausing live video.
- Increased the average character estimate for calculating tab positions in skins,
  to better suit wide fonts (reported by Rudi Hofer).
- Fixed getting the subsystem ids of DVB devices in case they have been rearranged
  via udev rules.
- Added several cTimer::Set...() functions (suggested by Alexander Rieger).
- Changed the return value of cTimer::SetFile() to 'void'.
- Revoked "Fixed a possible deadlock in time shift mode" because it caused trouble with
  output on vdr-xine and dxr3, and also short glitches when replaying on any output
  device.
- Updated the Estonian OSD texts (thanks to Arthur Konovalov).
- Updated the Finnish OSD texts (thanks to Rolf Ahrenberg).
- Fixed handling subtitle color palettes on channels where subtitles appear
  "word by word" (thanks to Rolf Ahrenberg).
- Fixed upscaling cBitmaps with anti-aliasing (thanks to Rolf Ahrenberg for reporting
  a problem with color palettes in subtitles).
- Fixed getting the video aspect ratio for scaling subtitles.
- Removed the "PrimaryLimit". Old "full featured" DVB cards can be run with the
  --outputonly option to avoid problems with recording high bandwidth channels.
  Besides, with HDTV becoming ever more popular those cards are pretty much obsolete
  by now (the TT S2-6400 has no problems recording and replaying high bandwidth
  channels simultaneously). And, last but not least, people using software players
  won't notice this change, anyway.
- Since cReceivers can have priorities between -99 and 99, the priority
  for an unused device has been changed from -1 to -100.
- 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. This way an external
  EPG source can fill the schedules with EPG data that will not be messed up with
  that from the DVB data stream. Note, though, that this means VDR can not do VPS
  controlled recordings with such events!
- Added some typecasts to silence gcc compiler warnings (thanks to Rolf Ahrenberg).
- Fixed handling overlapping timers in case a VPS timer with higher priority needs
  to interrupt a timer with lower priority.
- The code for the RCU remote control unit has been moved into a separate plugin
  named "rcu".
  The REMOTE=RCU option in the 'make' call for VDR is now obsolete.
  The command line option --rcu is now obsolete. Use -Prcu instead. If you have
  used --rcu with a device path, use -P"rcu -d<device>".
- Added support for automatically selecting subtitles when playing old PES
  recordings made with the subtitles plugin (thanks to Anssi Hannula).
- Revised priority handling to allow receivers with a priority that is lower than
  that of live viewing (with suggestions from Frank Schmirler):
  + An idle device (one that is not used for live viewing and has no receiver
    attached to it) now has priority IDLEPRIORITY (-100).
  + An unused CAM slot now has priority IDLEPRIORITY.
  + The default priority of a cReceiver is now MINPRIORITY (-99).
  + A device that is used only for live viewing (no matter whether it's in Transfer
    Mode or real live mode) now has priority TRANSFERPRIORITY (-1).
  + The function cDevice::Receiving() now returns true if there is any receiver
    attached to the device. Its boolean parameter has no meaning any more.
  + The default value for the Priority parameter of the function cDevice::ProvidesChannel()
    has been changed to IDLEPRIORITY.
- Added a Query parameter to cDevice::GetDevice(), so that devices can be queried
  without side effects when zapping.
- Replaced min(max()) calls with the new function constrain().
- Fixed handling OSD color button texts in case a menu item has texts of its own
  (reported by Rolf Ahrenberg). If a plugin creates derived cMenuEditItems that set
  color button texts, these should not set the texts directly by calling
  cSkinDisplay::Current()->SetButtons(), but rather call the new member function
  cMenuEditItem::SetHelp().
- Moved the call to cStatus::MsgChannelSwitch(this, 0) to the beginning of
  cDevice::SetChannel(), so that any receivers that have been attached to the
  device by plugins may be detached before the final call to GetDevice().
  This actually reverts "Only calling cStatus::MsgChannelSwitch() if a channel
  is actually going to be switched or has actually been switched successfully"
  which was made in version 1.1.10, so please report if this has any unwanted
  side effects.
2012-03-10 23:52:09 +01:00

549 lines
21 KiB
C
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/*
* pat.c: PAT section filter
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: pat.c 2.17 2012/03/02 10:56:45 kls Exp $
*/
#include "pat.h"
#include <malloc.h>
#include "channels.h"
#include "libsi/section.h"
#include "libsi/descriptor.h"
#include "thread.h"
#define PMT_SCAN_TIMEOUT 10 // seconds
// --- cCaDescriptor ---------------------------------------------------------
class cCaDescriptor : public cListObject {
private:
int caSystem;
int esPid;
int length;
uchar *data;
public:
cCaDescriptor(int CaSystem, int CaPid, int EsPid, int Length, const uchar *Data);
virtual ~cCaDescriptor();
bool operator== (const cCaDescriptor &arg) const;
int CaSystem(void) { return caSystem; }
int EsPid(void) { return esPid; }
int Length(void) const { return length; }
const uchar *Data(void) const { return data; }
};
cCaDescriptor::cCaDescriptor(int CaSystem, int CaPid, int EsPid, int Length, const uchar *Data)
{
caSystem = CaSystem;
esPid = EsPid;
length = Length + 6;
data = MALLOC(uchar, length);
data[0] = SI::CaDescriptorTag;
data[1] = length - 2;
data[2] = (caSystem >> 8) & 0xFF;
data[3] = caSystem & 0xFF;
data[4] = ((CaPid >> 8) & 0x1F) | 0xE0;
data[5] = CaPid & 0xFF;
if (Length)
memcpy(&data[6], Data, Length);
}
cCaDescriptor::~cCaDescriptor()
{
free(data);
}
bool cCaDescriptor::operator== (const cCaDescriptor &arg) const
{
return esPid == arg.esPid && length == arg.length && memcmp(data, arg.data, length) == 0;
}
// --- cCaDescriptors --------------------------------------------------------
class cCaDescriptors : public cListObject {
private:
int source;
int transponder;
int serviceId;
int numCaIds;
int caIds[MAXCAIDS + 1];
cList<cCaDescriptor> caDescriptors;
void AddCaId(int CaId);
public:
cCaDescriptors(int Source, int Transponder, int ServiceId);
bool operator== (const cCaDescriptors &arg) const;
bool Is(int Source, int Transponder, int ServiceId);
bool Is(cCaDescriptors * CaDescriptors);
bool Empty(void) { return caDescriptors.Count() == 0; }
void AddCaDescriptor(SI::CaDescriptor *d, int EsPid);
int GetCaDescriptors(const int *CaSystemIds, int BufSize, uchar *Data, int EsPid);
const int *CaIds(void) { return caIds; }
};
cCaDescriptors::cCaDescriptors(int Source, int Transponder, int ServiceId)
{
source = Source;
transponder = Transponder;
serviceId = ServiceId;
numCaIds = 0;
caIds[0] = 0;
}
bool cCaDescriptors::operator== (const cCaDescriptors &arg) const
{
cCaDescriptor *ca1 = caDescriptors.First();
cCaDescriptor *ca2 = arg.caDescriptors.First();
while (ca1 && ca2) {
if (!(*ca1 == *ca2))
return false;
ca1 = caDescriptors.Next(ca1);
ca2 = arg.caDescriptors.Next(ca2);
}
return !ca1 && !ca2;
}
bool cCaDescriptors::Is(int Source, int Transponder, int ServiceId)
{
return source == Source && transponder == Transponder && serviceId == ServiceId;
}
bool cCaDescriptors::Is(cCaDescriptors *CaDescriptors)
{
return Is(CaDescriptors->source, CaDescriptors->transponder, CaDescriptors->serviceId);
}
void cCaDescriptors::AddCaId(int CaId)
{
if (numCaIds < MAXCAIDS) {
for (int i = 0; i < numCaIds; i++) {
if (caIds[i] == CaId)
return;
}
caIds[numCaIds++] = CaId;
caIds[numCaIds] = 0;
}
}
void cCaDescriptors::AddCaDescriptor(SI::CaDescriptor *d, int EsPid)
{
cCaDescriptor *nca = new cCaDescriptor(d->getCaType(), d->getCaPid(), EsPid, d->privateData.getLength(), d->privateData.getData());
for (cCaDescriptor *ca = caDescriptors.First(); ca; ca = caDescriptors.Next(ca)) {
if (*ca == *nca) {
delete nca;
return;
}
}
AddCaId(nca->CaSystem());
caDescriptors.Add(nca);
//#define DEBUG_CA_DESCRIPTORS 1
#ifdef DEBUG_CA_DESCRIPTORS
char buffer[1024];
char *q = buffer;
q += sprintf(q, "CAM: %04X %5d %5d %04X %04X -", source, transponder, serviceId, d->getCaType(), EsPid);
for (int i = 0; i < nca->Length(); i++)
q += sprintf(q, " %02X", nca->Data()[i]);
dsyslog("%s", buffer);
#endif
}
// EsPid is to select the "type" of CaDescriptor to be returned
// >0 - CaDescriptor for the particular esPid
// =0 - common CaDescriptor
// <0 - all CaDescriptors regardless of type (old default)
int cCaDescriptors::GetCaDescriptors(const int *CaSystemIds, int BufSize, uchar *Data, int EsPid)
{
if (!CaSystemIds || !*CaSystemIds)
return 0;
if (BufSize > 0 && Data) {
int length = 0;
for (cCaDescriptor *d = caDescriptors.First(); d; d = caDescriptors.Next(d)) {
if (EsPid < 0 || d->EsPid() == EsPid) {
const int *caids = CaSystemIds;
do {
if (d->CaSystem() == *caids) {
if (length + d->Length() <= BufSize) {
memcpy(Data + length, d->Data(), d->Length());
length += d->Length();
}
else
return -1;
}
} while (*++caids);
}
}
return length;
}
return -1;
}
// --- cCaDescriptorHandler --------------------------------------------------
class cCaDescriptorHandler : public cList<cCaDescriptors> {
private:
cMutex mutex;
public:
int AddCaDescriptors(cCaDescriptors *CaDescriptors);
// Returns 0 if this is an already known descriptor,
// 1 if it is an all new descriptor with actual contents,
// and 2 if an existing descriptor was changed.
int GetCaDescriptors(int Source, int Transponder, int ServiceId, const int *CaSystemIds, int BufSize, uchar *Data, int EsPid);
};
int cCaDescriptorHandler::AddCaDescriptors(cCaDescriptors *CaDescriptors)
{
cMutexLock MutexLock(&mutex);
for (cCaDescriptors *ca = First(); ca; ca = Next(ca)) {
if (ca->Is(CaDescriptors)) {
if (*ca == *CaDescriptors) {
delete CaDescriptors;
return 0;
}
Del(ca);
Add(CaDescriptors);
return 2;
}
}
Add(CaDescriptors);
return CaDescriptors->Empty() ? 0 : 1;
}
int cCaDescriptorHandler::GetCaDescriptors(int Source, int Transponder, int ServiceId, const int *CaSystemIds, int BufSize, uchar *Data, int EsPid)
{
cMutexLock MutexLock(&mutex);
for (cCaDescriptors *ca = First(); ca; ca = Next(ca)) {
if (ca->Is(Source, Transponder, ServiceId))
return ca->GetCaDescriptors(CaSystemIds, BufSize, Data, EsPid);
}
return 0;
}
cCaDescriptorHandler CaDescriptorHandler;
int GetCaDescriptors(int Source, int Transponder, int ServiceId, const int *CaSystemIds, int BufSize, uchar *Data, int EsPid)
{
return CaDescriptorHandler.GetCaDescriptors(Source, Transponder, ServiceId, CaSystemIds, BufSize, Data, EsPid);
}
// --- cPatFilter ------------------------------------------------------------
cPatFilter::cPatFilter(void)
{
pmtIndex = 0;
pmtPid = 0;
pmtSid = 0;
lastPmtScan = 0;
numPmtEntries = 0;
Set(0x00, 0x00); // PAT
}
void cPatFilter::SetStatus(bool On)
{
cFilter::SetStatus(On);
pmtIndex = 0;
pmtPid = 0;
pmtSid = 0;
lastPmtScan = 0;
numPmtEntries = 0;
}
void cPatFilter::Trigger(void)
{
numPmtEntries = 0;
}
bool cPatFilter::PmtVersionChanged(int PmtPid, int Sid, int Version)
{
uint64_t v = Version;
v <<= 32;
uint64_t id = (PmtPid | (Sid << 16)) & 0x00000000FFFFFFFFLL;
for (int i = 0; i < numPmtEntries; i++) {
if ((pmtVersion[i] & 0x00000000FFFFFFFFLL) == id) {
bool Changed = (pmtVersion[i] & 0x000000FF00000000LL) != v;
if (Changed)
pmtVersion[i] = id | v;
return Changed;
}
}
if (numPmtEntries < MAXPMTENTRIES)
pmtVersion[numPmtEntries++] = id | v;
return true;
}
void cPatFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length)
{
if (Pid == 0x00) {
if (Tid == 0x00) {
if (pmtPid && time(NULL) - lastPmtScan > PMT_SCAN_TIMEOUT) {
Del(pmtPid, 0x02);
pmtPid = 0;
pmtIndex++;
lastPmtScan = time(NULL);
}
if (!pmtPid) {
SI::PAT pat(Data, false);
if (!pat.CheckCRCAndParse())
return;
SI::PAT::Association assoc;
int Index = 0;
for (SI::Loop::Iterator it; pat.associationLoop.getNext(assoc, it); ) {
if (!assoc.isNITPid()) {
if (Index++ >= pmtIndex && Channels.GetByServiceID(Source(), Transponder(), assoc.getServiceId())) {
pmtPid = assoc.getPid();
pmtSid = assoc.getServiceId();
Add(pmtPid, 0x02);
break;
}
}
}
if (!pmtPid)
pmtIndex = 0;
}
}
}
else if (Pid == pmtPid && Tid == SI::TableIdPMT && Source() && Transponder()) {
SI::PMT pmt(Data, false);
if (!pmt.CheckCRCAndParse())
return;
if (pmt.getServiceId() != pmtSid)
return; // skip broken PMT records
if (!PmtVersionChanged(pmtPid, pmt.getTableIdExtension(), pmt.getVersionNumber())) {
lastPmtScan = 0; // this triggers the next scan
return;
}
if (!Channels.Lock(true, 10)) {
numPmtEntries = 0; // to make sure we try again
return;
}
cChannel *Channel = Channels.GetByServiceID(Source(), Transponder(), pmt.getServiceId());
if (Channel) {
SI::CaDescriptor *d;
cCaDescriptors *CaDescriptors = new cCaDescriptors(Channel->Source(), Channel->Transponder(), Channel->Sid());
// Scan the common loop:
for (SI::Loop::Iterator it; (d = (SI::CaDescriptor*)pmt.commonDescriptors.getNext(it, SI::CaDescriptorTag)); ) {
CaDescriptors->AddCaDescriptor(d, 0);
delete d;
}
// Scan the stream-specific loop:
SI::PMT::Stream stream;
int Vpid = 0;
int Ppid = 0;
int Vtype = 0;
int Apids[MAXAPIDS + 1] = { 0 }; // these lists are zero-terminated
int Atypes[MAXAPIDS + 1] = { 0 };
int Dpids[MAXDPIDS + 1] = { 0 };
int Dtypes[MAXDPIDS + 1] = { 0 };
int Spids[MAXSPIDS + 1] = { 0 };
uchar SubtitlingTypes[MAXSPIDS + 1] = { 0 };
uint16_t CompositionPageIds[MAXSPIDS + 1] = { 0 };
uint16_t AncillaryPageIds[MAXSPIDS + 1] = { 0 };
char ALangs[MAXAPIDS][MAXLANGCODE2] = { "" };
char DLangs[MAXDPIDS][MAXLANGCODE2] = { "" };
char SLangs[MAXSPIDS][MAXLANGCODE2] = { "" };
int Tpid = 0;
int NumApids = 0;
int NumDpids = 0;
int NumSpids = 0;
for (SI::Loop::Iterator it; pmt.streamLoop.getNext(stream, it); ) {
bool ProcessCaDescriptors = false;
int esPid = stream.getPid();
switch (stream.getStreamType()) {
case 1: // STREAMTYPE_11172_VIDEO
case 2: // STREAMTYPE_13818_VIDEO
case 0x1B: // MPEG4
Vpid = esPid;
Ppid = pmt.getPCRPid();
Vtype = stream.getStreamType();
ProcessCaDescriptors = true;
break;
case 3: // STREAMTYPE_11172_AUDIO
case 4: // STREAMTYPE_13818_AUDIO
case 0x0F: // ISO/IEC 13818-7 Audio with ADTS transport syntax
case 0x11: // ISO/IEC 14496-3 Audio with LATM transport syntax
{
if (NumApids < MAXAPIDS) {
Apids[NumApids] = esPid;
Atypes[NumApids] = stream.getStreamType();
SI::Descriptor *d;
for (SI::Loop::Iterator it; (d = stream.streamDescriptors.getNext(it)); ) {
switch (d->getDescriptorTag()) {
case SI::ISO639LanguageDescriptorTag: {
SI::ISO639LanguageDescriptor *ld = (SI::ISO639LanguageDescriptor *)d;
SI::ISO639LanguageDescriptor::Language l;
char *s = ALangs[NumApids];
int n = 0;
for (SI::Loop::Iterator it; ld->languageLoop.getNext(l, it); ) {
if (*ld->languageCode != '-') { // some use "---" to indicate "none"
if (n > 0)
*s++ = '+';
strn0cpy(s, I18nNormalizeLanguageCode(l.languageCode), MAXLANGCODE1);
s += strlen(s);
if (n++ > 1)
break;
}
}
}
break;
default: ;
}
delete d;
}
NumApids++;
}
ProcessCaDescriptors = true;
}
break;
case 5: // STREAMTYPE_13818_PRIVATE
case 6: // STREAMTYPE_13818_PES_PRIVATE
//XXX case 8: // STREAMTYPE_13818_DSMCC
{
int dpid = 0;
int dtype = 0;
char lang[MAXLANGCODE1] = { 0 };
SI::Descriptor *d;
for (SI::Loop::Iterator it; (d = stream.streamDescriptors.getNext(it)); ) {
switch (d->getDescriptorTag()) {
case SI::AC3DescriptorTag:
case SI::EnhancedAC3DescriptorTag:
dpid = esPid;
dtype = d->getDescriptorTag();
ProcessCaDescriptors = true;
break;
case SI::SubtitlingDescriptorTag:
if (NumSpids < MAXSPIDS) {
Spids[NumSpids] = esPid;
SI::SubtitlingDescriptor *sd = (SI::SubtitlingDescriptor *)d;
SI::SubtitlingDescriptor::Subtitling sub;
char *s = SLangs[NumSpids];
int n = 0;
for (SI::Loop::Iterator it; sd->subtitlingLoop.getNext(sub, it); ) {
if (sub.languageCode[0]) {
SubtitlingTypes[NumSpids] = sub.getSubtitlingType();
CompositionPageIds[NumSpids] = sub.getCompositionPageId();
AncillaryPageIds[NumSpids] = sub.getAncillaryPageId();
if (n > 0)
*s++ = '+';
strn0cpy(s, I18nNormalizeLanguageCode(sub.languageCode), MAXLANGCODE1);
s += strlen(s);
if (n++ > 1)
break;
}
}
NumSpids++;
}
break;
case SI::TeletextDescriptorTag:
Tpid = esPid;
break;
case SI::ISO639LanguageDescriptorTag: {
SI::ISO639LanguageDescriptor *ld = (SI::ISO639LanguageDescriptor *)d;
strn0cpy(lang, I18nNormalizeLanguageCode(ld->languageCode), MAXLANGCODE1);
}
break;
default: ;
}
delete d;
}
if (dpid) {
if (NumDpids < MAXDPIDS) {
Dpids[NumDpids] = dpid;
Dtypes[NumDpids] = dtype;
strn0cpy(DLangs[NumDpids], lang, MAXLANGCODE1);
NumDpids++;
}
}
}
break;
case 0x80: // STREAMTYPE_USER_PRIVATE - DigiCipher II VIDEO (ANSI/SCTE 57)
Vpid = esPid;
Ppid = pmt.getPCRPid();
Vtype = 0x02; // compression based upon MPEG-2
ProcessCaDescriptors = true;
break;
case 0x81: // STREAMTYPE_USER_PRIVATE - ATSC A/53 AUDIO (ANSI/SCTE 57)
{
char lang[MAXLANGCODE1] = { 0 };
SI::Descriptor *d;
for (SI::Loop::Iterator it; (d = stream.streamDescriptors.getNext(it)); ) {
switch (d->getDescriptorTag()) {
case SI::ISO639LanguageDescriptorTag: {
SI::ISO639LanguageDescriptor *ld = (SI::ISO639LanguageDescriptor *)d;
strn0cpy(lang, I18nNormalizeLanguageCode(ld->languageCode), MAXLANGCODE1);
}
break;
default: ;
}
delete d;
}
if (NumDpids < MAXDPIDS) {
Dpids[NumDpids] = esPid;
Dtypes[NumDpids] = SI::AC3DescriptorTag;
strn0cpy(DLangs[NumDpids], lang, MAXLANGCODE1);
NumDpids++;
}
ProcessCaDescriptors = true;
}
break;
case 0x82 ... 0xFF: // STREAMTYPE_USER_PRIVATE
{
char lang[MAXLANGCODE1] = { 0 };
bool IsAc3 = false;
SI::Descriptor *d;
for (SI::Loop::Iterator it; (d = stream.streamDescriptors.getNext(it)); ) {
switch (d->getDescriptorTag()) {
case SI::RegistrationDescriptorTag: {
SI::RegistrationDescriptor *rd = (SI::RegistrationDescriptor *)d;
// http://www.smpte-ra.org/mpegreg/mpegreg.html
switch (rd->getFormatIdentifier()) {
case 0x41432D33: // 'AC-3'
IsAc3 = true;
break;
default:
//printf("Format identifier: 0x%08X (pid: %d)\n", rd->getFormatIdentifier(), esPid);
break;
}
}
break;
case SI::ISO639LanguageDescriptorTag: {
SI::ISO639LanguageDescriptor *ld = (SI::ISO639LanguageDescriptor *)d;
strn0cpy(lang, I18nNormalizeLanguageCode(ld->languageCode), MAXLANGCODE1);
}
break;
default: ;
}
delete d;
}
if (IsAc3) {
if (NumDpids < MAXDPIDS) {
Dpids[NumDpids] = esPid;
Dtypes[NumDpids] = SI::AC3DescriptorTag;
strn0cpy(DLangs[NumDpids], lang, MAXLANGCODE1);
NumDpids++;
}
ProcessCaDescriptors = true;
}
}
break;
default: ;//printf("PID: %5d %5d %2d %3d %3d\n", pmt.getServiceId(), stream.getPid(), stream.getStreamType(), pmt.getVersionNumber(), Channel->Number());
}
if (ProcessCaDescriptors) {
for (SI::Loop::Iterator it; (d = (SI::CaDescriptor*)stream.streamDescriptors.getNext(it, SI::CaDescriptorTag)); ) {
CaDescriptors->AddCaDescriptor(d, esPid);
delete d;
}
}
}
if (Setup.UpdateChannels >= 2) {
Channel->SetPids(Vpid, Ppid, Vtype, Apids, Atypes, ALangs, Dpids, Dtypes, DLangs, Spids, SLangs, Tpid);
Channel->SetCaIds(CaDescriptors->CaIds());
Channel->SetSubtitlingDescriptors(SubtitlingTypes, CompositionPageIds, AncillaryPageIds);
}
Channel->SetCaDescriptors(CaDescriptorHandler.AddCaDescriptors(CaDescriptors));
}
lastPmtScan = 0; // this triggers the next scan
Channels.Unlock();
}
}
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