Re: Chunk size limits in AudioUnits?
Re: Chunk size limits in AudioUnits?
- Subject: Re: Chunk size limits in AudioUnits?
- From: Howard Moon <email@hidden>
- Date: Tue, 30 Dec 2008 11:11:15 -0800
I'm looking at storing a rather large amount of state data (maybe
50Meg or more) in an effect plug-in. From what I can tell, the
only limit seems to be the size specified when creating the data
storage, which is limited by the size of a long, which means 2Gb.
Naturally, I'd run into physical limitations on most users'
machines long before trying to allocate 2Gb, but what about 50 or
60Meg? Would this cause a problem (esp. in Logic or GarageBand)?
If your plugin can be instantiated e.g. 20 times (not uncommon for
effects), then yes: 50MB will be an issue, because 20 * 50 is 1GB
and AU hosts will crash _hard_ when reaching the 32 bit memory
limit. This problem already exists with certain samplers which
allocate a lot of memory and when running out of address space will
crash the host.
Hi Markus,
well, I'm doubtful my plug-in would be instantiated 20 times, but I
see your point. What I'm wondering though is if there's any limit on
a single plug-in's state size (other than the available memory and
the 32-bit address size limit). I wouldn't think so, given that the
memory is managed by the plug-in, but I was warned by someone on a
VST mailing list to watch out for limits in Logic and GarageBand, so
I'm checking here to be sure.
Thanks,
-Howard
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