MIDIDriverEnableSource
MIDIDriverEnableSource
- Subject: MIDIDriverEnableSource
- From: Andy <email@hidden>
- Date: Sun, 8 Sep 2002 00:28:26 +0100
Has anyone out there actually used/implemented the EnableSource
method of a MIDI driver plug-in interface ?
EnableSource(MIDIEndpointRef src, Boolean enabled)
I just can't make sense of it. It appears that whatever I do with the
EndpointRef (src) that is passed to the function I always get a -50
error.
the most vague error of all! Normally that means that some parameter in
a function is bad and as the /only/ parameter is a MIDIEndpointRef
it must mean that the ref being passed to the driver by the system is
invalid !
MIDIEndpointGetEntity and MIDIEndpointGetRefCons both return -50 when
used inside EnableSource(). So just what is being passed to my driver
here ?
ATM I don't see how it can be a bug in my driver code that is causing
this, perhaps it is, but most of my code is based on the sample MIDI
driver source provided by Apple.
The driver is working well and correctly apart from this one function.
(Which I was kind of relying on to turn on/off an IO task)
I notice that the Apple sample studiously avoids implementing
EnableSource !!
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