Re: What sort of timer should I use for my sequencer?
Re: What sort of timer should I use for my sequencer?
- Subject: Re: What sort of timer should I use for my sequencer?
- From: Brian Willoughby <email@hidden>
- Date: Sat, 29 Jan 2011 15:49:03 -0800
You should not use the highest priority. If you just blindly crank
up the priority then you'll either make the rest of the system
perform poorly, or you'll get busted and the system will demote your
priority as punishment. Instead, you should use fixed priority.
Also, I seem to recall that priority is relative, so 0 priority is
probably not the lowest, but normal. I think you can have positive
and negative priorities. Plus, the system will alter your priority
if your code behaves poorly. There should be tons of information in
the comments of the various CoreAudio samples about just this sort of
thing.
Brian Willoughby
Sound Consulting
On Jan 29, 2011, at 12:08, Morgan Packard wrote:
I set it to highest priority -- 1. It's working well now, but not 100%
perfectly. I'm pretty sure the last time I tested it, I got a few
glitches as the app was entering the background.
-m-
On Sat, Jan 29, 2011 at 3:27 AM, tahome izwah
<email@hidden> wrote:
So what priority did you set it to?
--th
2011/1/29 Morgan Packard <email@hidden>:
I've managed to move my audio generation code out of the RemoteIO
callback thread. I'm now writing to a buffer on a separate thread,
using a while loop and [NSThread sleepForTimeInterval:] on a new
thread (NSThread detachNewThreadSelector). It took me a minute to
figure out that I need to set the priority on the thread. Seems that
the default priority is zero, so I was getting many more glitches
than
I was with my objective-c selectors in the remote io callback
thread!
Anyway, things seem to be working well now. Thanks to all helped me
out with this.
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