February 2009 - h323plus - lists.packetizer.com

PTimedMutex::Wait patch
by Nir Soffer 17 Feb '09

17 Feb '09

In PTimedMutex::Wait(const PTimeInterval & waitTime), when pthread_mutex_timedlock is not available or broken (it is broken on our arm platform), the code always sleeps before checking the finish time, which is incorrect. For example, if you call Wait(0), and fail to acquire the lock, you will sleep for 10 milliseconds before you get back the retrun value. This is a bigger issue if you use H323EndPoint::FindConnectionWithLock: PWaitAndSignal mutex(connectionsMutex); H323Connection * connection; while ((connection = FindConnectionWithoutLocks(token)) != NULL) { // XXX this will block for 10 milliseconds if the lock can not be acquired! // TryLock calls Wait(0) which sleeps for 10ms on failure switch (connection->TryLock()) { case 0 : return NULL; case 1 : return connection; } // Could not get connection lock, unlock the endpoint lists so a thread // that has the connection lock gets a chance at the endpoint lists. connectionsMutex.Signal(); PThread::Sleep(20); connectionsMutex.Wait(); } return NULL; The code try sleep for 20 milliseconds while the connectionsMutex is unlocked, letting the other thread that hold the connection a chancee to use the endpoint lists, but for each 30 milliseconds cycle, it keeps the endpoint lists locked for 10 milliseconds. Attached a trivial fix. Best Regards, Nir Soffer

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Re: [h323plus] mute/unmute
by mohammad alam 14 Feb '09

14 Feb '09

hi you can close audio channel as a mute function. and restart channel on unmute through connection object. It works fine alam On Fri, Feb 13, 2009 at 11:02 PM, mohammad alam <cheersalam(a)gmail.com>wrote: > you can close audio channel as a mute function. and restart channel on > unmute > > > On Thu, Feb 12, 2009 at 3:56 AM, Marcus Frenkel <marcus.frenkel(a)gmail.com>wrote: > >> Hi Marcos >> >> Thank you very much for the input. >> >> I searched for the pause function and H323Channel is the class that >> has it. Indeed the basic SetPause appears to does nothing, but it >> actually does mute the desired channel by changing the bool paused = >> true which is processed afterwords by the RTP session. >> >> Thank you again it really helped me. If there is anything that I can >> help you with please let me know. May I say - God Bless You. >> >> Marcus >> >> >> On 2/11/09, Marcos Fábio Jardini <marcos.f.jardini(a)gmail.com> wrote: >> > Hi Marcus >> > >> > If I remember well, when working on my projects, >> > P(Input/Output)(Audio/Video)Devide have the signatures for 'pause'. But >> the >> > basic implememtation return TRUE and does nothing. >> > >> > You need implement what pause will do. For some codecs you can simple >> stop >> > sending data therefore stoping the RTP engine, some times you don't >> wanna >> > drop the assigned network bandwidth and use silence packets or dummy >> > packets >> > (some plugins don't accept or have the resource of silency packets). >> > >> > Summarizing, you need to implement such feature, perphaps looking at >> Ekiga >> > and like applications source code. >> > >> > Regards, >> > Eng. Marcos F. Jardini >> > >> > >> > 2009/2/8 Marcus Frenkel <marcus.frenkel(a)gmail.com> >> > >> >> I'm still strugling over the mute/unmute solution, any help would be >> >> appreciated. >> >> >> >> If there is no chance to do that with the functions already in >> >> h323plus/ptlib, can anybody tell me whether the rtp mute option added >> >> in gnugk mutes the input and output channel or only the input channel? >> >> >> >> Marcus >> >> >> >> On 2/7/09, Marcus Frenkel <marcus.frenkel(a)gmail.com> wrote: >> >> > Hi, >> >> > >> >> > First, I would like to thank Packetizer for continuing the open h323 >> >> > development. >> >> > >> >> > Ptlib/h323plus have big set of functions, but I'm not able to find >> the >> >> > right one I need. Is there any function to mute/unmute the input >> sound >> >> > device while the call is in progress? Any help is greatly >> appreciated. >> >> > >> >> > Marcus >> >> > >> >> >> > >> > >> > >> > -- >> > ----- >> > Jogue RPG, alimente o lado criativo! >> > >> >> >

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mute/unmute
by Marcus Frenkel 12 Feb '09

12 Feb '09

Hi, First, I would like to thank Packetizer for continuing the open h323 development. Ptlib/h323plus have big set of functions, but I'm not able to find the right one I need. Is there any function to mute/unmute the input sound device while the call is in progress? Any help is greatly appreciated. Marcus

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g729 plugins for lunux
by Zarko Markovic 06 Feb '09

06 Feb '09

Hi, I would like to try out g729 plugins for linux. The g729 plugins available at h323plus.org are easycodecs and voiceage, but it seems that they can only be build under windows. Any solution to have linux based g729 audio plugin for h323plus based application? Zarko

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