RTCPMemberDatabase Class Reference

Collaboration diagram for RTCPMemberDatabase:

[legend]

Public Member Functions
	RTCPMemberDatabase (RTCPInstance &ourRTCPInstance)
virtual	~RTCPMemberDatabase ()
Boolean	isMember (unsigned ssrc) const
Boolean	noteMembership (unsigned ssrc, unsigned curTimeCount)
Boolean	remove (unsigned ssrc)
unsigned	numMembers () const
void	reapOldMembers (unsigned threshold)
Private Attributes
RTCPInstance &	fOurRTCPInstance
unsigned	fNumMembers
HashTable *	fTable

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Detailed Description

Definition at line 27 of file RTCP.cpp.

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Constructor & Destructor Documentation

RTCPMemberDatabase::RTCPMemberDatabase

(

RTCPInstance &

ourRTCPInstance

)

[inline]

Definition at line 29 of file RTCP.cpp.

    : fOurRTCPInstance(ourRTCPInstance), fNumMembers(1 /*ourself*/),
      fTable(HashTable::create(ONE_WORD_HASH_KEYS)) {
  }

virtual RTCPMemberDatabase::~RTCPMemberDatabase

(

)

[inline, virtual]

Definition at line 34 of file RTCP.cpp.

References fTable.

                                {
        delete fTable;
  }

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Member Function Documentation

Boolean RTCPMemberDatabase::isMember

(

unsigned

ssrc

)

const [inline]

Definition at line 38 of file RTCP.cpp.

References fTable, HashTable::Lookup(), and NULL.

Referenced by noteMembership().

                                        {
    return fTable->Lookup((char*)(long)ssrc) != NULL;
  }

Boolean RTCPMemberDatabase::noteMembership	(	unsigned	ssrc,
		unsigned	curTimeCount
	)			[inline]

Definition at line 42 of file RTCP.cpp.

References HashTable::Add(), fNumMembers, fTable, and isMember().

Referenced by RTCPInstance::checkNewSSRC().

                                                               {
    Boolean isNew = !isMember(ssrc);

    if (isNew) {
      ++fNumMembers;
    }

    // Record the current time, so we can age stale members
    fTable->Add((char*)(long)ssrc, (void*)(long)curTimeCount);

    return isNew;
  }

Boolean RTCPMemberDatabase::remove

(

unsigned

ssrc

)

[inline]

Definition at line 55 of file RTCP.cpp.

References fNumMembers, fTable, and HashTable::Remove().

Referenced by RTCPInstance::removeSSRC().

                                {
    Boolean wasPresent = fTable->Remove((char*)(long)ssrc);
    if (wasPresent) {
      --fNumMembers;
    }
    return wasPresent;
  }

unsigned RTCPMemberDatabase::numMembers

(

)

const [inline]

Definition at line 63 of file RTCP.cpp.

References fNumMembers.

Referenced by RTCPInstance::numMembers().

                              {
    return fNumMembers;
  }

void RTCPMemberDatabase::reapOldMembers

(

unsigned

threshold

)

Definition at line 75 of file RTCP.cpp.

References HashTable::Iterator::create(), False, fOurRTCPInstance, fTable, iter, MediaSubsessionIterator::next(), RTCPInstance::removeSSRC(), and True.

Referenced by RTCPInstance::sendReport().

                                                          {
  Boolean foundOldMember;
  u_int32_t oldSSRC = 0;

  do {
    foundOldMember = False;

    HashTable::Iterator* iter
      = HashTable::Iterator::create(*fTable);
    uintptr_t timeCount;
    char const* key;
    while ((timeCount = (uintptr_t)(iter->next(key))) != 0) {
#ifdef DEBUG
      fprintf(stderr, "reap: checking SSRC 0x%lx: %ld (threshold %d)\n", (unsigned long)key, timeCount, threshold);
#endif
      if (timeCount < (uintptr_t)threshold) { // this SSRC is old
        uintptr_t ssrc = (uintptr_t)key;
        oldSSRC = (u_int32_t)ssrc;
        foundOldMember = True;
      }
    }
    delete iter;

    if (foundOldMember) {
#ifdef DEBUG
        fprintf(stderr, "reap: removing SSRC 0x%x\n", oldSSRC);
#endif
      fOurRTCPInstance.removeSSRC(oldSSRC, True);
    }
  } while (foundOldMember);
}

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Field Documentation

RTCPInstance& RTCPMemberDatabase::fOurRTCPInstance [private]

Definition at line 70 of file RTCP.cpp.

Referenced by reapOldMembers().

unsigned RTCPMemberDatabase::fNumMembers [private]

Definition at line 71 of file RTCP.cpp.

Referenced by noteMembership(), numMembers(), and remove().

HashTable* RTCPMemberDatabase::fTable [private]

Definition at line 72 of file RTCP.cpp.

Referenced by isMember(), noteMembership(), reapOldMembers(), remove(), and ~RTCPMemberDatabase().

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The documentation for this class was generated from the following file:

• liveMedia/RTCP.cpp

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