Re: PlayThru (was: AudioUnit for default input device)
Re: PlayThru (was: AudioUnit for default input device)
- Subject: Re: PlayThru (was: AudioUnit for default input device)
- From: Lieven Dekeyser <email@hidden>
- Date: Mon, 19 Nov 2001 11:58:50 +0100 (CET)
>
> Is there an easy way get the default input device to play through the
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> default output device?
>
>
If the default input and the default output device are the same device and
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that device presents them together in the IOProc (presuming
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kAudioDevicePropertyPlayThru isn't supported), you can just copy the data
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from the input buffers to the output buffers in your IOProc.
Yep... got that to work just fine. Thanks for the suggestion. I found the
code I needed in the Daisy sample code from Apple.
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If the default input and the default output device are different devices.
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You will have to deal with moving the data coming in from one IOProc to the
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buffer going out in another IOProc. You could use a queue of some kind. Be
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sure to copy the data out of the input buffers to your own buffers since
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those buffers get reused by the HAL each cycle.
I tried to copy the AudioBufferLists and put these copies in a queue, but
it didn't work :-(
Are the IOProcs fired at interrupt time? If so, I guess calling malloc and
memcpy isn't allowed, right? How do you copy the bufferdata?
any help would be appreciated!
greetz,
Lieven