[Openal] Typical settings for streaming sources

[Garin Hiebert]

 >> First and foremost, are there any "well, duh" factors that I might be  
 >> missing? :) I think I've checked everything, but I may not habe.

It seems like you're checking for the right thing, and that you have an 
occasional under-run condition.  OpenAL is supposed to stop a source 
when the queued data runs out, so your solution of detecting the stop 
and then re-starting is the right solution.  The underlying cause is 
going to be a little more complicated to figure out, as you've already 
experienced...  ;-)

You might want to revisit the buffer sizes and make sure they're 
appropriate for what you're playing.  If the Ogg Vorbis data is being 
decoded to a 44.1kHz stereo PCM stream, for instance, then each of your 
buffers (4 * 4096 bytes) contains less than 10ms of data, which may be 
too small for the service interval (given that one service interval may 
occur just before a buffer is fully used, and then one or more buffers 
may be spanned before the next service interval occurs).

BTW -- having multiple buffers be processed "at once" is plausible -- 
the timer interval inside the "Generic Hardware" and "Generic Software" 
devices is larger than 10ms (I think it's 25ms for both, but I don't 
have the source code in front of me).

Garin