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Re: Multichannel AU bus names
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Re: Multichannel AU bus names


  • Subject: Re: Multichannel AU bus names
  • From: Brian Willoughby <email@hidden>
  • Date: Thu, 14 Feb 2008 10:03:46 -0800

On Feb 14, 2008, at 02:55, Martin Saleteg wrote:
I am searching in docs and sources for a place to change the output names for the busses of multichannel plugins. In Logic 8, if I have a long plugin name like "My Very Long Plugin", the main stereo output shows up as "My Very" and due to limited space, the following output buses will show the same, not very informative. On the other hand, UltraBeat shows the extra outputs as "UB 3/4", I would like to implement the same behavior "MVLP 3/4" for my plugin. What do I need to do?

Martin,

I don't think I've set the bus names in any of my AUs, but it should work the same as setting any other string. In the function which sets the bus name, you'll have an in+out parameter for the name. Check the length of this to determine what to set for the name you return. In my case below, I'm setting clump names for parameters, and I expect the available space to be a minimum of the full length string, otherwise I return the "short" clump name. In your case, you might continue to use "My Very Long Plugin" as the name until the length available is less than 12 characters, meaning you might end up with "My Very Long" in the worst case, but then return "MVLP" for anything less than 12 characters available. In other words, you can have very unique criteria for deciding between names returned. You could also have more than two or three options. It depends upon how fancy you're willing to make your code which decides. Unlike Pro Tools RTAS, which I believe has precisely three length options, AudioUnit API allows for any number. Just remember, you're given the length in characters of the space available, so you must decide what string to return based upon that.

Sorry I don't have an example specifically for setting bus names, but if you're correctly setting them now, I don't think you'll have a problem fitting the clump name code below into your AU.


case kAudioUnitProperty_ParameterClumpName:
{
AudioUnitParameterIDName &name = *(AudioUnitParameterIDName *)outData;
name.outName = NULL;
if (name.inID && name.inID < sizeof(kParamClumpNames)/sizeof (kParamClumpNames[0]))
{
if (kAudioUnitParameterName_Full == name.inDesiredLength
|| CFStringGetLength(kParamClumpNames[name.inID]) <= name.inDesiredLength)
name.outName = kParamClumpNames[name.inID];
else
name.outName = kParamShortClumpNames[name.inID];
name.outName = CFStringCreateCopy(NULL, name.outName);
}
return noErr;
}


Brian Willoughby
Sound Consulting

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References: 
 >Multichannel AU bus names (From: Martin Saleteg <email@hidden>)

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