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Re: Multiple instances of an Audio Device
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Re: Multiple instances of an Audio Device


  • Subject: Re: Multiple instances of an Audio Device
  • From: Stephan <email@hidden>
  • Date: Tue, 27 Aug 2002 09:06:31 +0200

We had the very same problem. There's a bug in IOAudioEngine::getGlobalUniqueID(
). It fails to return different strings for different instances of the same PCI hardware. Just override getGlobalUniqueID in your AudioEngine subclass (using a different string for each hardware instance) and you'll see both.

Stephan

On Saturday, August 24, 2002, at 07:19 AM, Devendra Parakh wrote:

Hi,

We have an audio device driver (kext) for a PCI sound card that works
fine as long as we have one instance of the device.

When I plug in two of these cards - two instances of the driver objects
are created, initialized, etc.. Everything seems to work fine, except
that the CoreAudio HAL only reports the first instance.

Can anybody tell me what I need to do to get the second instance
recognized by CoreAudio?

Thanks.

Devendra.
Devendra ParakhSinging Electrons, Inc.http://www.singingelectrons.com425-889-2478
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