AUv3Wrapper parameterGroups not being filled?

Developer VST 3 SDK
,
1

Hi,

Looking at AUv3Wrapper in SDK 3.7.2 b28 I’m having some difficulty at AUV3Wrapper.mm:1315…

String str = parameterGroups.at (i - 1);

My plugin crashes because i=1 and parameterGroups contains zero elements.

Notexpsynth_auv3_macos doesn’t appear to hit this line. AGain_auv3_macos does, but I’m having trouble figuring out what is needed in buildParameterGroup:(ParameterInfo)pi to populate the parameterGroups vector.

Can anyone point me in the right direction?

Many thanks,
George

2

Check your unit info. It looks like you don’t have the root unit defined. Have you run the validator on your VST3 plug-in? Does it pass?

3

Found it. The vst3 plug-in does pass validation. But your suggestion turned up a block of code in my controller initialize() method, leftover from the hostchecker sample:

    // create a unit Latency parameter
    UnitInfo unitInfo;
    unitInfo.id = 0001;
    unitInfo.parentUnitId = kRootUnitId; // attached to the root unit
    Steinberg::UString (unitInfo.name, USTRINGSIZE (unitInfo.name)).assign (USTRING ("Setup"));
    unitInfo.programListId = kNoProgramListId;

    Unit* unit = new Unit (unitInfo);
    addUnit (unit);

Removing this fixes the problem. Not sure why I started with hostchecker code but it seemed appropriate at the time.

Thanks,
George

4

Did you remove all the code you posted above? I’d like to understand the issue correctly to make sure that no one else will trap in it after you :wink:

5

Yes, if I comment out this block of code, my AUv3 works. Uncomment and my AUv3 crashes at the same place.