Host callbacks - providing tempo from my host - what am I doing wrong?
Host callbacks - providing tempo from my host - what am I doing wrong?
- Subject: Host callbacks - providing tempo from my host - what am I doing wrong?
- From: Eagle Offshore <email@hidden>
- Date: Fri, 29 Jul 2011 15:49:49 -0700
| I have a host. I'm installing host callbacks into my audio units and getting no errors, but the units never call them and in some cases (Amplitube being one) the unit displays a status that the host is not providing tempo information.
Code:
HostCallbackInfo cb = { _host, HCallback_GetBeatAndTempo, HCallback_GetMusicalTimeLocation, HCallback_GetTransportState }; ComponentResult result = [self setGlobalProperty: kAudioUnitProperty_HostCallbacks element: 0 value: &cb size: sizeof(cb)];
where
-(ComponentResult) setGlobalProperty:(AudioUnitPropertyID)prop element:(UInt32)e value:(void*)v size:(UInt32)size { return [self setProperty:prop scope:kAudioUnitScope_Global element:e value:v size:size]; }
The result code indicates that the call succeeded. Do I have the scope wrong or something? Because the functions specified in the HostCallbackInfo never get called.
Thanks for any hints. -Todd Blanchard
|
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