[AG-TECH] How to develop a new service for AG?

[Thomas D. Uram]

Hi Michael:

Venue Management does give the impression that multicast addresses are static, but this 
only reflects the option of specifying static addresss for audio and video.  The venue 
server can allocate multicast addresses for services dynamically.  For each service with a 
producer capability, the venue will allocate a multicast address, if one does not already 
exist in the venue for that capability type.  The capability type is simply a string, so 
you shouldn't have to change code in the server or elsewhere for your new service to get 
its own address.

Tom



Michael Braitmaier wrote:
> Hello everyone!
> 
> I am currently in the process of writing a small service for AG which 
> basically just calls a program with multicast-ip/port/ttl. Nothing to 
> configure here. So basically it is like rat. Still it is not of type 
> audio or video. Therefore I assumed to introduce a new capability e.g. 
> IMAGE . Additionally I thought I could take the AudioService.py script 
> as a basis and just modify it as the tool I want to integrate into a 
> service behaves the same way as rat does.
> 
> When I thought about the port configuration of my new service, I 
> relaized that ports are specified in the Venue Management tool of the 
> VenueServer. The section for modifiying the ports there seem to be quite 
> hardcoded without space for other services. Is that true? Do I have to 
> extend the Venue Managment Tool and add a new entry for the new service 
> which would be quite of much effort? Or is there a dynamic way where the 
> Venue Managament Tool adapts on existing services? The same seems to 
> apply for the capability. If I add a new one I have to change quite a 
> lot of code through out the whole AG.
> 
> Another question is about what I have to obbey considering the 
> streamsDescription creation as well as the setting of the 
> streamDescription if I can influence them at all.
> 
> Thanks so far.
> Michael
> 
> ------------------
> Dipl.-Inf. Michael Braitmaier
> HLRS - Visualization / Video Conferencing
> University of Stuttgart
> Germany
> Website: http://www.hlrs.de/organization/vis/people/braitmaier/
>