[email protected] on June 2, 2016 at 12:00 PM -0700 wrote:
>Hi List,
>
>In AudioUnit v2 we could more or less rely on the
>HostCallback_GetBeatAndTempo to determine the beat and tempo of host. Now
>in AudioUnit v3 (from the Objective C angle) I can't find an equivalent
>API. This functionality is required by our AudioUnit, so this is a huge
>blocker at the moment.
>
>Any guidance is appreciated.
>
>Thanks
>
>Kevin
I believe you're looking for the AUHostMusicalContextBlock.
/*! @property musicalContextBlock
@brief A callback for the AU to call the host for musical
context
information.
@discussion
Note that an audio unit implementation accessing this property
should cache
it in
realtime-safe storage before beginning to render.
Bridged to the HostCallback_GetBeatAndTempo and
HostCallback_GetMusicalTimeLocation
callback members in kAudioUnitProperty_HostCallbacks.
*/
@property (NS_NONATOMIC_IOSONLY, copy, nullable) AUHostMusicalContextBlock
musicalContextBlock;
HTH
regards,
edward
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