Fixed handling shared CA pids

CONTRIBUTORS

@@ -3565,6 +3565,7 @@ Daniel Scheller <d.scheller@gmx.net>
 
 Onur Sentürk <onur@sentek.org>
  for making the MTD mapper avoid immediately reusing unique PIDs when switching channels
+ for fixing handling shared CA pids
 
 Helmut Binder <cco@aon.at>
  for improving calculating signal strength and quality

HISTORY

@@ -9348,7 +9348,7 @@ Video Disk Recorder Revision History
   Senzel).
 - Official release.
 
-2019-03-18: Version 2.4.1
+2019-03-19: Version 2.4.1
 
 - Fixed handling the tfRecording flag in the SVDRP commands MODT and UPDT (reported
   by Johann Friedrichs).
@@ -9389,3 +9389,4 @@ Video Disk Recorder Revision History
 - Fixed dropping capabilities in case cap_sys_time is not available.
 - Fixed updating the cursor position when switching channels with the Channel+/- keys
   while the Channels menu is open.
+- Fixed handling shared CA pids (thanks to Onur Sentürk).

ci.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: ci.c 4.22 2018/09/23 10:17:20 kls Exp $
+ * $Id: ci.c 4.23 2019/03/19 14:58:06 kls Exp $
  */
 
 #include "ci.h"
@@ -2505,10 +2505,12 @@ void cCamSlot::BuildCaPmts(uint8_t CmdId, cCiCaPmtList &CaPmtList, cMtdMapper *M
                   if (GetCaPids(source, transponder, p->programNumber, CaSystemIds, MAXRECEIVEPIDS + 1, CaPids) > 0) {
                      if (Active)
                         caPidReceiver->AddPids(CaPids);
-                     else
+                     else {
+                        KeepSharedCaPids(p->programNumber, CaSystemIds, CaPids);
                         caPidReceiver->DelPids(CaPids);
                         }
                      }
+                  }
                if (RepliesToQuery())
                   CaPmt->SetListManagement(Active ? CPLM_ADD : CPLM_UPDATE);
                if (MtdMapper)
@@ -2522,6 +2524,43 @@ void cCamSlot::BuildCaPmts(uint8_t CmdId, cCiCaPmtList &CaPmtList, cMtdMapper *M
      }
 }
 
+void cCamSlot::KeepSharedCaPids(int ProgramNumber, const int *CaSystemIds, int *CaPids)
+{
+  int numPids = 0;
+  int *pCaPids = CaPids;
+  while (*pCaPids) {
+        numPids++;
+        pCaPids++;
+        }
+  if (numPids <= 0)
+     return;
+  int CaPids2[MAXRECEIVEPIDS + 1];
+  for (cCiCaProgramData *p = caProgramList.First(); p; p = caProgramList.Next(p)) {
+      if (p->programNumber != ProgramNumber) {
+         if (GetCaPids(source, transponder, p->programNumber, CaSystemIds, MAXRECEIVEPIDS + 1, CaPids2) > 0) {
+            int *pCaPids2 = CaPids2;
+            while (*pCaPids2) {
+                  pCaPids = CaPids;
+                  while (*pCaPids) {
+                        if (*pCaPids == *pCaPids2) {
+                           dsyslog("CAM %d: keeping shared CA pid %d", SlotNumber(), *pCaPids);
+                           // To remove *pCaPids from CaPids we overwrite it with the last valie in the list, and then strip the last value:
+                           *pCaPids = CaPids[numPids - 1];
+                           numPids--;
+                           CaPids[numPids] = 0;
+                           if (numPids <= 0)
+                              return;
+                           }
+                        else
+                           pCaPids++;
+                        }
+                  pCaPids2++;
+                  }
+            }
+         }
+      }
+}
+
 void cCamSlot::SendCaPmts(cCiCaPmtList &CaPmtList)
 {
   cMutexLock MutexLock(&mutex);

ci.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: ci.h 4.12 2018/03/17 12:17:37 kls Exp $
+ * $Id: ci.h 4.13 2019/03/19 14:58:00 kls Exp $
  */
 
 #ifndef __CI_H
@@ -254,6 +254,7 @@ private:
   cList<cCiCaProgramData> caProgramList;
   bool mtdAvailable;
   cMtdHandler *mtdHandler;
+  void KeepSharedCaPids(int ProgramNumber, const int *CaSystemIds, int *CaPids);
   void NewConnection(void);
   void DeleteAllConnections(void);
   void Process(cTPDU *TPDU = NULL);