Added receiving Ca pids to cCamSlot

HISTORY

@@ -8032,7 +8032,7 @@ Video Disk Recorder Revision History
   the last replayed recording (if any) by pressing Ok repeatedly in the Recordings
   menu.
 
-2013-12-29: Version 2.1.3
+2014-01-01: Version 2.1.3
 
 - Changed the return value of cPositioner::HorizonLongitude() to 0 in case the
   latitude of the antenna location is beyond +/-81 degrees.
@@ -8091,7 +8091,10 @@ Video Disk Recorder Revision History
   Skyttä).
 - The new function cCamSlot::Decrypt() can be used by derived classes to implement a
   CAM slot that can be freely assigned to any device, without being directly inserted
-  into the full TS data stream in hardware.
+  into the full TS data stream in hardware. A derived class that implements Decrypt()
+  will also need to set the new parameter ReceiveCaPids in the call to the cCamSlot
+  base class constructor to true, in order to receive the CA pid TS packets that
+  contain data necessary for decrypting.
 - Many member functions of cCamSlot have been made virtual to allow for easier
   implementation of derived classes.
 - cTSBuffer now provides the number of available bytes in its Get() function.

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 3.2 2013/12/29 15:51:08 kls Exp $
+ * $Id: ci.c 3.3 2014/01/01 12:33:27 kls Exp $
  */
 
 #include "ci.h"
@@ -19,6 +19,7 @@
 #include <unistd.h>
 #include "device.h"
 #include "pat.h"
+#include "receiver.h"
 #include "tools.h"
 
 // Set these to 'true' for debug output:
@@ -102,6 +103,16 @@ static char *GetString(int &Length, const uint8_t **Data)
   return NULL;
 }
 
+// --- cCaPidReceiver --------------------------------------------------------
+
+// A dummy receiver, just used to make the device receive the CA pids.
+
+class cCaPidReceiver : public cReceiver {
+public:
+  virtual ~cCaPidReceiver() { Detach(); }
+  virtual void Receive(uchar *Data, int Length) {}
+  };
+
 // --- cTPDU -----------------------------------------------------------------
 
 #define MAX_TPDU_SIZE  2048
@@ -570,7 +581,7 @@ bool cCiApplicationInformation::EnterMenu(void)
 #define CPCI_QUERY            0x03
 #define CPCI_NOT_SELECTED     0x04
 
-class cCiCaPmt : public cListObject {
+class cCiCaPmt {
   friend class cCiConditionalAccessSupport;
 private:
   uint8_t cmdId;
@@ -1553,9 +1564,10 @@ cCamSlots CamSlots;
 #define MODULE_CHECK_INTERVAL 500 // ms
 #define MODULE_RESET_TIMEOUT    2 // s
 
-cCamSlot::cCamSlot(cCiAdapter *CiAdapter)
+cCamSlot::cCamSlot(cCiAdapter *CiAdapter, bool ReceiveCaPids)
 {
   ciAdapter = CiAdapter;
+  caPidReceiver = ReceiveCaPids ? new cCaPidReceiver : NULL;
   slotIndex = -1;
   lastModuleStatus = msReset; // avoids initial reset log message
   resetTime = 0;
@@ -1572,6 +1584,7 @@ cCamSlot::cCamSlot(cCiAdapter *CiAdapter)
 
 cCamSlot::~cCamSlot()
 {
+  delete caPidReceiver;
   CamSlots.Del(this, false);
   DeleteAllConnections();
 }
@@ -1802,6 +1815,10 @@ void cCamSlot::SendCaPmt(uint8_t CmdId)
      const int *CaSystemIds = cas->GetCaSystemIds();
      if (CaSystemIds && *CaSystemIds) {
         if (caProgramList.Count()) {
+           if (caPidReceiver && caPidReceiver->NumPids()) {
+              if (cDevice *d = Device())
+                 d->Detach(caPidReceiver);
+              }
            for (int Loop = 1; Loop <= 2; Loop++) {
                for (cCiCaProgramData *p = caProgramList.First(); p; p = caProgramList.Next(p)) {
                    if (p->modified || resendPmt) {
@@ -1814,6 +1831,15 @@ void cCamSlot::SendCaPmt(uint8_t CmdId)
                              }
                           }
                       if ((Loop == 1) != Active) { // first remove, then add
+                         if (caPidReceiver) {
+                            int CaPids[MAXRECEIVEPIDS + 1];
+                            if (GetCaPids(source, transponder, p->programNumber, CaSystemIds, MAXRECEIVEPIDS + 1, CaPids) > 0) {
+                               if (Loop == 1)
+                                  caPidReceiver->DelPids(CaPids);
+                               else
+                                  caPidReceiver->AddPids(CaPids);
+                               }
+                            }
                          if (cas->RepliesToQuery())
                             CaPmt.SetListManagement(Active ? CPLM_ADD : CPLM_UPDATE);
                          if (Active || cas->RepliesToQuery())
@@ -1823,6 +1849,10 @@ void cCamSlot::SendCaPmt(uint8_t CmdId)
                       }
                    }
                }
+           if (caPidReceiver && caPidReceiver->NumPids()) {
+              if (cDevice *d = Device())
+                 d->AttachReceiver(caPidReceiver);
+              }
            resendPmt = false;
            }
         else {

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 3.1 2013/12/28 13:20:08 kls Exp $
+ * $Id: ci.h 3.2 2014/01/01 12:13:04 kls Exp $
  */
 
 #ifndef __CI_H
@@ -121,6 +121,7 @@ class cTPDU;
 class cCiTransportConnection;
 class cCiSession;
 class cCiCaProgramData;
+class cReceiver;
 
 class cCamSlot : public cListObject {
   friend class cCiAdapter;
@@ -129,6 +130,7 @@ private:
   cMutex mutex;
   cCondVar processed;
   cCiAdapter *ciAdapter;
+  cReceiver *caPidReceiver;
   int slotIndex;
   int slotNumber;
   cCiTransportConnection *tc[MAX_CONNECTIONS_PER_CAM_SLOT + 1];  // connection numbering starts with 1
@@ -147,10 +149,13 @@ private:
   void Write(cTPDU *TPDU);
   cCiSession *GetSessionByResourceId(uint32_t ResourceId);
 public:
-  cCamSlot(cCiAdapter *CiAdapter);
+  cCamSlot(cCiAdapter *CiAdapter, bool ReceiveCaPids = false);
        ///< Creates a new CAM slot for the given CiAdapter.
        ///< The CiAdapter will take care of deleting the CAM slot,
        ///< so the caller must not delete it!
+       ///< If ReceiveCaPids is true, the CAM slot will take care that the CA pids
+       ///< of the selected programmes will be included in the TS data stream that
+       ///< is presented to the Decrypt() function.
   virtual ~cCamSlot();
   bool Assign(cDevice *Device, bool Query = false);
        ///< Assigns this CAM slot to the given Device, if this is possible.
@@ -243,6 +248,9 @@ public:
        ///< Data pointing to the TS packet immediately following the previous
        ///< one. However, it can not be assumed that a call to Decrypt() with
        ///< a Data pointer of P will be followed by a call with P + TS_SIZE.
+       ///< A derived class that implements this function will also need
+       ///< to set the ReceiveCaPids parameter in the call to the base class
+       ///< constructor to true in order to receive the CA pid data.
   };
 
 class cCamSlots : public cList<cCamSlot> {};

device.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: device.c 3.5 2013/12/28 12:56:24 kls Exp $
+ * $Id: device.c 3.6 2014/01/01 11:51:17 kls Exp $
  */
 
 #include "device.h"
@@ -1666,7 +1666,7 @@ bool cDevice::AttachReceiver(cReceiver *Receiver)
          Receiver->device = this;
          receiver[i] = Receiver;
          Unlock();
-         if (camSlot) {
+         if (camSlot && Receiver->priority > MINPRIORITY) { // priority check to avoid an infinite loop with the CAM slot's caPidReceiver
             camSlot->StartDecrypting();
             startScrambleDetection = time(NULL);
             }
@@ -1697,7 +1697,7 @@ void cDevice::Detach(cReceiver *Receiver)
       else if (receiver[i])
          receiversLeft = true;
       }
-  if (camSlot)
+  if (camSlot && Receiver->priority > MINPRIORITY) // priority check to avoid an infinite loop with the CAM slot's caPidReceiver
      camSlot->StartDecrypting();
   if (!receiversLeft)
      Cancel(-1);

pat.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: pat.c 2.19 2012/11/25 14:12:21 kls Exp $
+ * $Id: pat.c 3.1 2014/01/01 12:02:39 kls Exp $
  */
 
 #include "pat.h"
@@ -21,6 +21,7 @@
 class cCaDescriptor : public cListObject {
 private:
   int caSystem;
+  int caPid;
   int esPid;
   int length;
   uchar *data;
@@ -29,6 +30,7 @@ public:
   virtual ~cCaDescriptor();
   bool operator== (const cCaDescriptor &arg) const;
   int CaSystem(void) { return caSystem; }
+  int CaPid(void) { return caPid; }
   int EsPid(void) { return esPid; }
   int Length(void) const { return length; }
   const uchar *Data(void) const { return data; }
@@ -37,6 +39,7 @@ public:
 cCaDescriptor::cCaDescriptor(int CaSystem, int CaPid, int EsPid, int Length, const uchar *Data)
 {
   caSystem = CaSystem;
+  caPid = CaPid;
   esPid = EsPid;
   length = Length + 6;
   data = MALLOC(uchar, length);
@@ -79,6 +82,7 @@ public:
   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);
+  int GetCaPids(const int *CaSystemIds, int BufSize, int *Pids);
   const int *CaIds(void) { return caIds; }
   };
 
@@ -179,6 +183,30 @@ int cCaDescriptors::GetCaDescriptors(const int *CaSystemIds, int BufSize, uchar
   return -1;
 }
 
+int cCaDescriptors::GetCaPids(const int *CaSystemIds, int BufSize, int *Pids)
+{
+  if (!CaSystemIds || !*CaSystemIds)
+     return 0;
+  if (BufSize > 0 && Pids) {
+     int numPids = 0;
+     for (cCaDescriptor *d = caDescriptors.First(); d; d = caDescriptors.Next(d)) {
+         const int *caids = CaSystemIds;
+         do {
+            if (d->CaSystem() == *caids) {
+               if (numPids + 1 < BufSize) {
+                  Pids[numPids++] = d->CaPid();
+                  Pids[numPids] = 0;
+                  }
+               else
+                  return -1;
+               }
+            } while (*++caids);
+         }
+     return numPids;
+     }
+  return -1;
+}
+
 // --- cCaDescriptorHandler --------------------------------------------------
 
 class cCaDescriptorHandler : public cList<cCaDescriptors> {
@@ -190,6 +218,7 @@ public:
       // 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 GetCaPids(int Source, int Transponder, int ServiceId, const int *CaSystemIds, int BufSize, int *Pids);
   };
 
 int cCaDescriptorHandler::AddCaDescriptors(cCaDescriptors *CaDescriptors)
@@ -220,6 +249,16 @@ int cCaDescriptorHandler::GetCaDescriptors(int Source, int Transponder, int Serv
   return 0;
 }
 
+int cCaDescriptorHandler::GetCaPids(int Source, int Transponder, int ServiceId, const int *CaSystemIds, int BufSize, int *Pids)
+{
+  cMutexLock MutexLock(&mutex);
+  for (cCaDescriptors *ca = First(); ca; ca = Next(ca)) {
+      if (ca->Is(Source, Transponder, ServiceId))
+         return ca->GetCaPids(CaSystemIds, BufSize, Pids);
+      }
+  return 0;
+}
+
 cCaDescriptorHandler CaDescriptorHandler;
 
 int GetCaDescriptors(int Source, int Transponder, int ServiceId, const int *CaSystemIds, int BufSize, uchar *Data, int EsPid)
@@ -227,6 +266,11 @@ int GetCaDescriptors(int Source, int Transponder, int ServiceId, const int *CaSy
   return CaDescriptorHandler.GetCaDescriptors(Source, Transponder, ServiceId, CaSystemIds, BufSize, Data, EsPid);
 }
 
+int GetCaPids(int Source, int Transponder, int ServiceId, const int *CaSystemIds, int BufSize, int *Pids)
+{
+  return CaDescriptorHandler.GetCaPids(Source, Transponder, ServiceId, CaSystemIds, BufSize, Pids);
+}
+
 // --- cPatFilter ------------------------------------------------------------
 
 cPatFilter::cPatFilter(void)

pat.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: pat.h 2.3 2013/02/16 15:20:24 kls Exp $
+ * $Id: pat.h 3.1 2013/12/30 11:32:40 kls Exp $
  */
 
 #ifndef __PAT_H
@@ -39,7 +39,13 @@ int GetCaDescriptors(int Source, int Transponder, int ServiceId, const int *CaSy
          ///< are copied that match one of the given CA system IDs.
          ///< Returns the number of bytes copied into Data (0 if no CA descriptors are
          ///< available), or -1 if BufSize was too small to hold all CA descriptors.
-         ///< The return value tells whether these CA descriptors are to be used
+
-         ///< for the individual streams.
+int GetCaPids(int Source, int Transponder, int ServiceId, const int *CaSystemIds, int BufSize, int *Pids);
+         ///< Gets all CA pids for a given channel.
+         ///< Copies all available CA pids from the CA descriptors for the given Source, Transponder and ServiceId
+         ///< into the provided buffer at Pids (at most BufSize - 1 entries, the list will be zero-terminated).
+         ///< Only the CA pids of those CA descriptors are copied that match one of the given CA system IDs.
+         ///< Returns the number of pids copied into Pids (0 if no CA descriptors are
+         ///< available), or -1 if BufSize was too small to hold all CA pids.
 
 #endif //__PAT_H

receiver.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: receiver.c 2.7 2012/06/02 13:20:38 kls Exp $
+ * $Id: receiver.c 3.1 2014/01/01 12:03:00 kls Exp $
  */
 
 #include "receiver.h"
@@ -72,6 +72,28 @@ bool cReceiver::SetPids(const cChannel *Channel)
   return true;
 }
 
+void cReceiver::DelPid(int Pid)
+{
+  if (Pid) {
+     for (int i = 0; i < numPids; i++) {
+         if (pids[i] == Pid) {
+            for ( ; i < numPids; i++) // we also copy the terminating 0!
+                pids[i] = pids[i + 1];
+            numPids--;
+            return;
+            }
+         }
+     }
+}
+
+void cReceiver::DelPids(const int *Pids)
+{
+  if (Pids) {
+     while (*Pids)
+           DelPid(*Pids++);
+     }
+}
+
 bool cReceiver::WantsPid(int Pid)
 {
   if (Pid) {

receiver.h

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: receiver.h 2.9 2012/09/02 09:27:20 kls Exp $
+ * $Id: receiver.h 3.1 2014/01/01 11:45:09 kls Exp $
  */
 
 #ifndef __RECEIVER_H
@@ -64,7 +64,13 @@ public:
                ///< through ChannelID(). The ChannelID is necessary to allow the device
                ///< that will be used for this receiver to detect and store whether the
                ///< channel can be decrypted in case this is an encrypted channel.
+  void DelPid(int Pid);
+               ///< Deletes the given Pid from the list of PIDs of this receiver.
+  void DelPids(const int *Pids);
+               ///< Deletes the given zero terminated list of Pids from the list of PIDs of this
+               ///< receiver.
   tChannelID ChannelID(void) { return channelID; }
+  int NumPids(void) const { return numPids; }
   bool IsAttached(void) { return device != NULL; }
                ///< Returns true if this receiver is (still) attached to a device.
                ///< A receiver may be automatically detached from its device in