Re: Bug in IOAudioStream?
Re: Bug in IOAudioStream?
- Subject: Re: Bug in IOAudioStream?
- From: Shaun Wexler <email@hidden>
- Date: Mon, 15 Aug 2005 11:51:51 -0700
On Aug 15, 2005, at 11:42 AM, Jeff Moore wrote:
Looking at the IORegistry I see that all three streams are
present, but the IOAudioStreamStartingChannelNumber property for
the third stream is missing.
This is why the HAL ignores this third stream. That property is
vital so that the HAL knows what order to present the streams in
the IOProc.
FWIW, this is also one of the bugs in Digidesign's CoreAudio user-
land driver. It doesn't set the starting channel number of its
streams; they all report 0. This can wreak havoc on app's which
depend on the property. As a workaround I simply rely on the HAL to
give me a proper buffer list, and parse from that.
--
Shaun Wexler
MacFOH
http://www.macfoh.com
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