This example should help answer these questions.

http://svn.freeswitch.org/svn/freeswitch/trunk/scripts/lua/callback.lua

On Feb 8, 2010, at 3:33 AM, rentmycoder rentmycoder wrote:

Guys,

I would like to play a file and stop playing on (0,* or #) but don't
stop or restart playing on any other digit. I need to know which digit
was pressed...
How to achive this in lua?

local digits = session:playAndGetDigits(0, 1, 5, 3000, "0*#",
wavbasedir .. "f.wav", "", "\*|\#|0");

Is there any DETAILED doc how playAndGetDigits works or do I have to
dig into source?


Thats the best example of returns from the input callback, I think you can also retun "true" to have the file continue uninterrupted.

http://wiki.freeswitch.org/wiki/Mod_lua#session:setInputCallback
http://wiki.freeswitch.org/wiki/Mod_lua

Mike