Re: questions about Logic AU node properties
Re: questions about Logic AU node properties
- Subject: Re: questions about Logic AU node properties
- From: "Sophia Poirier [dfx]" <email@hidden>
- Date: Wed, 14 Nov 2007 21:26:34 -0500
Niko,
Thanks for the explanation of endian-swapping responsibilities with
the private properties, that clears up all of my questions.
On Nov 6, 2007, at 9:03 AM, Nikolaus Gerteis wrote:
2) Is there a recommended way to handle a custom AU property that
references a local file? If an AU is running on a node and it has
a remote UI running on the master, and the UI allows the user to
open a file selector dialog choosing a local file on the master
machine (like perhaps an audio file to load for sampling or other
audio manipulation), then if a reference to that file needs to be
passed from UI to the active AU via a custom property.
A solution for this is to put the file reading code into the UI
component and transfer the loaded data as a private property. This
guarantees that all node instances receive exactly the same data.
Additionally it allows the user to use files that are on the master
machine only.
But this has two significant shortcomings: 1) it means that I can no
longer use the ExtendedAudioFile API to read audio files (since they
require an FSRef to start from), and 2) the audio files chosen by the
user can be arbitrarily large, so in some cases this could result in
unreasonably huge data transfer requirements.
Which leaves me wondering, how would I best pass a file
reference? Or is this a lost cause and an example of an AU which
simply shouldn't be node-enabled?
Passing file references is difficult, as the file might not be
accessible from one of the nodes (see above).
Or if there is a good way to reference the file, what are the
issues of network file access for a node machine? Will it even
have privileges or access to network files given the way that
nodes run?
Most likely not. The user would have to configure this, so you
shouldn't make any assumption that a file can be accessed over the
network.
Sounds like I ought to just mark the AU as explicitly not node-
enabled then.
thanks,
Sophia
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