Re: Did GarageBand stop playing?
Re: Did GarageBand stop playing?
- Subject: Re: Did GarageBand stop playing?
- From: Daniel Jalkut <email@hidden>
- Date: Tue, 24 Jan 2006 12:25:45 -0500
| Thanks, kelly. (And others who replied!)
I'm glad to know I wasn't just missing something obvious. I will look into the GetTransportState option, but I guess I would still have to install some kind of timer to periodically call through to the host.
Maybe support for this will improve as "generator" type instruments become more prevalent. I tried to look to AUFilePlayer as a possible example, but it doesn't seem to be well-supported in GarageBand 2.0. (I am waiting for my Intel Mac to bring new GarageBand goodness).
Daniel On Jan 24, 2006, at 9:47 AM, kelly jacklin wrote: Hey Daniel,
Check out HostCallback_GetTransportState in AudioUnitProperties.h and here: <file:///Developer/Examples/CoreAudio/Documentation/AudioUnits/Topics/au_properties.html#HostCallbacks-MusicalTime>
It has a boolean indicating whether or not the transport is currently running. I do not know for sure whether GB supports this currently, but what you want is what it's intended for, so it's worth a try.
I know there have been issues in the past with Logic incorrectly filling in the HostCallbackInfo structure with garbage for the callbacks it didn't know about (which this one is), but I do not know if this applies to GB. See the archives for (IIRC) Marc Poirier's excellent discussion of how to detect whether you can trust this callback when running under Logic, and indeed how to detect if you are running under Logic to know whether you need to worry about it. This may all be moot nowadays, or you may not care if this is just for your own use in GB...
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