Re: Realtime audio processing using AUHALs
Re: Realtime audio processing using AUHALs
- Subject: Re: Realtime audio processing using AUHALs
- From: William Stewart <email@hidden>
- Date: Mon, 7 Jun 2004 12:51:18 -0700
On 07/06/2004, at 12:12 PM, Chilton Webb wrote:
>
Hi,
>
>
I'm trying to understand how the AUHAL system works. But an
>
understanding of this stuff is being quite elusive.
>
For example, I'd like to implement a realtime filter using the input
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and outputs. So to do this, is the following the correct chain of
>
events?
>
>
1) Find and open my filter AU component
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2) set up my output device
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3) add an IOProc to the output device pointing back to my filter
Not this step - if you are using the AUHAL unit for I/O then it does
that itself - all you have to do is connect up your Filter AU to the
AUHAL unit, connect your filter AU to the AUHAL for its input, and you
are good to go... you basically don't have to deal with AudioDevice
kinds of issues at all (by and large at least)
Bill
>
4) set up the input device
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5) enable it with kAudioOutputUnitProperty_EnableIO
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6) set the input device to output to my filter
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(I might be off on the terminology for #6)
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7) start the output device
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Is that right? If not, what am I missing?
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>
Thanks,
>
-Chilton
>
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