[h323plus] Crash in Ptlib...........

Simon Horne s.horne at packetizer.com
Mon Jun 16 16:50:49 EDT 2008

  -----Original Message-----
  From: mohammad alam [mailto:cheersalam at gmail.com]
  Sent: Tuesday, June 17, 2008 3:16 AM
  To: Simon Horne
  Subject: Re: [h323plus] Crash in Ptlib...........


  Yes I can remove but I dont want to..

  I am adding H323_h224 capability for Far End Camera Control. Is this the
reason for Multiple control channel


  On Mon, Jun 9, 2008 at 12:33 AM, Simon Horne <s.horne at packetizer.com>


    Sorry for the delay

    You can disable extended video capability by

    But I don't think that is the problem. As I mentioned before you are
    2 control channels somehow.


    -----Original Message-----
    From: h323plus-bounces at lists.packetizer.com
    [mailto:h323plus-bounces at lists.packetizer.com]On Behalf Of mohammad alam
    Sent: Saturday, June 07, 2008 2:35 PM
    To: H323plus
    Subject: [h323plus] Crash in Ptlib...........

    Simon, Robert

    I am not using H323Connection::OnSendCapabilitySet()
    Robert, As you suggested I go through my code many times and have taken
    great care of pointers.

    I tried to debug the library and I find the reason for PTlib crash. I am
    sure.but It solved the problem for me

    In file h323caps.cxx
    Line no . 2064

     H323CodecExtendedVideoCapability::OnSendingPDU(H245_VideoCapability &
    pdu) const
    1 if (table.GetSize() > 0) {
    2       caps.SetSize(table.GetSize());
    3     for (PINDEX i=0; i< table.GetSize(); i++) {
    4          H245_VideoCapability vidcap;
    5       ((H323VideoCapability &)table[i]).OnSendingPDU(vidcap);
    6       caps[i] = vidcap;
    7       }
    8     } else {
    9       caps.SetSize(extCapabilities.GetSize());
    10     for (PINDEX i=0; i< extCapabilities.GetSize(); i++) {
    11         H245_VideoCapability vidcap;
    12         ((H323VideoCapability
    13         caps[i] = vidcap;
    14     }
    15    }

    Here in line no. 1 if (table.GetSize() > 0) {   table.GetSize() does not
    initialsed after the end of the call
    table.GetSize() increases in order 0, 2, 4, 16, 32, 64, 128, 256 and

    I am not using Extended channel. But by default plugins add H.263
    How to avoid this?? Where is the problem??


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