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Re: Re: CallHostTransportState

> From: Stefan Gretscher <email@hidden>
> Date: 2004/07/29 to PM 11:37:59 GMT
> To: email@hidden
> CC: CoreAudio API <email@hidden>
> Dmne: Re: CallHostTransportState
>
> Am 27.07.2004 um 15:02 schrieb email@hidden:
> > Is it OK to query the host for transport information yet?
> Should be.
>
> > I tried to use it anyway but I get mostly crashes out of Logic 6.4.1.
> The currently released versions of Logic don't support transport
> information. We're in the process of upgrading Logics AU hosting
> and newer versions will handle this properly.
>
> Does 6.4.2 crash as well? I recall having fixed a bug in the host
> callbacks that was striking when AUs requested more callbacks
> than Logic was supporting, and I think that was before 6.4.2 but
> I'm not sure. That should save you from crashing.

No, you are right. I just updated to 6.4.2 and it doesn't crash.

/Olof W



>
> By the way, AUs that don't need transport info can probably work
> around this crash bug by changing the size returned by
> AudioUnitGetPropertyInfo for the kAudioUnitProperty_HostCallbacks
> so that it only handles those callbacks that Logic supports:
>
> typedef struct OldHostCallbackInfo {
> void * hostUserData;
> HostCallback_GetBeatAndTempo beatAndTempoProc;
> HostCallback_GetMusicalTimeLocation musicalTimeLocationProc;
> } OldHostCallbackInfo;
>
>
> Kind regards,
>
> Stefan Gretscher
>
> plug-in development & 3rd party plug-in support
> Emagic Soft- & Hardware GmbH
>
> Stefan Gretscher
>
> plug-in development & 3rd party plug-in support
> Emagic Soft- & Hardware GmbH
> a subsidiary of Apple Computer, Inc.
>
> email: email@hidden
> phone: (+49)-4101-495-586
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