[LAD] Session Handlers and 'level 1' support

[rosea grammostola]

Hi,


I don't know who locked himself up after the 'LADI' discussion to 
actually write an session handler for Linux. :) But in meantime Ladish 
has added 'level 1' support:

"When ladish studio is being saved, applications that are run at level 1 
receive the SIGUSR1 UNIX signal.
 In signal handler function, a global variable can be set to mark that 
save is needed. On next main loop iteration, the global variable is 
checked and eventually save is made.
 Save of the internal state can be made in a fixed file path, but it is 
more useful to supply the file path through commandline. When starting, 
app loads its internal state from the file specified. When saving, app 
saves its internal state to the file specified."
http://ladish.org/wiki/level1

Ams, Jack_Mixer and  calfjackhost (in progress) has already added level 
1 support, and it seems to work OK (all though there are some 
improvements ahead).

An advantage compared to 'LASH' or 'Ladish' support seems to be that 
level 1 is pretty easy to implement by the application developers.


Now I'm wondering whether this 'level 1' could be a point of agreement 
between different (potential) Session Handlers for Linux. If other 
Session Handlers also adds 'level 1' support, it would make the 
implementation of more then one Session Handler more easy and less 
problematic for the Linux Audio world in my opinion. What do you think?


Regards,

\r