Re: avoiding VM page swaps for big sample buffers
Re: avoiding VM page swaps for big sample buffers
- Subject: Re: avoiding VM page swaps for big sample buffers
- From: Ben Cox <email@hidden>
- Date: Sat, 25 Sep 2004 19:50:10 -0400
Frank,
On Sep 25, 2004, at 6:52 PM, Frank (Steim) wrote:
Well, first of all a vector of 512 samples gives you a callback time
of a little more than 11 ms (the sample rate is 44kHz) and second: yes
in this vecotr I can make sample jumps (and calculated crossfades and
zero cross searches) which I want to be able to do within my whole
sample buffer. Of course I could put a restriction in max buffer size
and usually I don't need such a big buffer (mostly just a few minutes
long), but for this partical project I need a really big buffer. (you
can find a demo of the program at:
http://www.steim.org/steim/lisa.html)
Would it work to have a smallish in-memory buffer for each zone for
instantaneous sample playback start, and then stream the samples for
each zone from disk after that? Or do you truly need to be able to
start playback instantaneously from *any* point in the large buffer?
(I.e.: any point in the large buffer, or just points near the zone
boundaries?)
-- Ben
__
Ben Cox <email@hidden>
http://www.djehuti.com
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