[Live-devel] Sorry about that, but I forgot my name... (How to add remove a ServerMediaSubssesion on the fly?)

[Σκαζίκης Ιωάννης]

Hi Ross,

I have written an mpeg4 streamer based on live555 using (My)DeviceSource 
class, (My)VideoFileServerMediaSubsession class, and the 
MPEG4VideoStreamDiscreteFramer (based on your testOnDemandRTSPServer 
example).

Everything works fine, but I would like to ask you the following:

While an rtsp client is connected to the server I would like to remove 
the mediaSession and set up another one. How to do that?

I have a function which add's an sms:
fnct_add(){
   ServerMediaSession* sms
     = ServerMediaSession::createNew(*env, streamName, streamName,
                                     descriptionString);
   
sms->addSubsession(XvidVideoFileServerMediaSubsession::createNew(*env, 
inputFileName, reuseFirstSource));
   rtspServer->addServerMediaSession(sms);
}

and one function which removes the sms:

fnct_remove(){
   sms->close(*env,streamName);
   sms->~ServerMediaSession();
}

I run the
env->taskScheduler().doEventLoop(&watch_event_loop);

in its on process (new thread) and i use the watch_event_loop + a 
dummyTask(Null) to control the event loop.

In order to remove an sms I do:

1) set watch_event_loop =1 ion order to stop the endless loop
2) remove the sms ( sms->close(*env,streamName); and 
sms->~ServerMediaSession();
3)stop the tread which runs the 
env->taskScheduler().doEventLoop(&watch_event_loop);

in order to add a new sms I do:

1) add a new sms with
   ServerMediaSession* sms
     = ServerMediaSession::createNew(*env, streamName, streamName,
                                     descriptionString);
   
sms->addSubsession(XvidVideoFileServerMediaSubsession::createNew(*env, 
inputFileName, reuseFirstSource));
   rtspServer->addServerMediaSession(sms);

2) set watch_event_loop=0
3) create a new thread which runs the
env->taskScheduler().doEventLoop(&watch_event_loop);

Generally this process seems to work, but while the client (mplayer) is 
connected and the server is streaming,  if we remove the  sms the client 
stops playing the video stream but it does not close the connection with 
the server and  therefore live555 does not call the deconstructor of 
(My)DeviceSource class (which it does, if I stop the client first).

if I call again the function which add a new sms, then and only then 
live555 call's the deconstructor of (My)DeviceSource class first (which 
stops my frame grabber card) and then initialize a new instance of 
(My)DeviceSource (which starts my frame grabber card) when a client 
atemps to connect to the server again.

Why after the execution of sms->~ServerMediaSession();  does not call 
the deconstructor of (My)DeviceSource class?

Why the connection between client and server does not close,  when I 
remove the sms?

Which is the right way to add /remove an sms during a connection between 
server and client?

Thanks in advance,
Ioannis Skazikis
Intracom Defense Electronics.