Ross Finlayson wrote: > Yes, our RTSP server implementation takes care of that, *provided > that* you set the "reuseFirstSource" parameter to True when you > create each "ServerMediaSubsession" object. >
Nice! So, I was checking out the whole picture of the library, just trying to understand it. It's a pity there is not a good overview of the different classes and how they are used. So after looking at the sources, I will try to explain here, correct me if I'm wrong! To implement your own RTSP server, subclass RTSPServer, and reimplement lookupServerMediaSession. A media session represents a RTSP URL that a client can ask of the RTSP server, and represents one source of video and/or audio data. In lookupServerMediaSession, you check if the session already exists, and if not, create a standard one using the static function createNew of ServerMediaSession. Then you need to add a subsession to this session, and then you add the ServerMediaSession to your RTSP server object using rtspServer->addServerMediaSession. A subsession class is subclassed from OnDemandServerMediaSubsession and implements createNew to create a new subsession to add to your session. Also you reimplement createNewRTPSink so you can stream TO the network(from a file or whatever). This function must give back a RTPSink object. So you need to subclass MultiFramedRTPSink(see SimpleRTPSink for an example), and use it to create that RTPSink object. As far as I understand, the RTPSink object gives us the chance to set some RTP specific parameters like a marker bit or something, according to the contents of the individual RTP packet that will be sent out. SimpleRTPSink sets the marker bit on the last packet of a big frame for example. You also need to subclass createNewStreamSource of the OnDemandServerMediaSubsession class if you want to be able to receive data FROM the network. You need to give a FramedSource pointer in this function. So from now on, I'm not so sure anymore :) So we have a bunch of classes that contain the name 'Framer' in them, which are subclasses of FramedSource, and which write the incoming data again in a file in most cases I think. We have also MultiFramedRTPSource which is also a FramedSource. SimpleRTPSource is subclassed of this class. So we can return an object of this class in createNewStreamSource. Now I can't explain any further how the sink gets it's incoming data, and how the source gets the data, where is it? I don't understand. Can someone point me out here? Thanks a lot, Best regards, Tom Deblauwe So you need to subclass FramedFilter and implement the createNew function. A FramedFilter is also a FramedSource, and so you (must?) return an instance of your subclass in the createNewStreamSource function. How the _______________________________________________ live-devel mailing list live-devel@lists.live555.com http://lists.live555.com/mailman/listinfo/live-devel
