[vorbis-dev] Vorbize Multiple Files
dbt at meat.net
Fri Jun 23 12:54:47 PDT 2000
On Fri, Jun 23, 2000 at 11:59:57AM -0400, Kenneth C. Arnold wrote:
> Well it seems I'm still around for another day (but still can't really do
> much coding).
> Here's a project for anyone interested: add buffering to ogg123. I've tried
> to do a dynamic buffer (i.e., the buffer can grow as much as it wants), but
> I/O killed any improvements it would have made. That problem could easily
> be solved with clone(2). But this is only available on Linux!
> Maybe whatever sound output library somebody finds will have buffering that
You have to have separate processes in the scheduler, or buffering
doesn't gain you much (the point is to separate the pseudo-realtime
needs of output from the high processor usage decode -- high processor
usage is penalized by most schedulers). The other option is to
assign your process higher priority with the (relatively) cross-platform
setpriority(PRIO_PROCESS,0,-20), but this can be a performance problem.
I think defining multiple buffer methods and choosing which one is
optimal for a particular platform at configure time is appropriate.
A clone-based method for linux would not be unacceptable, in my
opinion, since there's no way buffering and multiprocessing is going
to be 100% crossplatform. Just have an alternative for non-linux
Dave, *sigh*, hopefully I'll have code time this weekend.
David Terrell | But remember that "layman" is just a polite
dbt at meat.net | word for "idiot."
http://wwn.nebcorp.com/ | - Neal Stephenson
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