A core audio bug? Is there a work-around?
A core audio bug? Is there a work-around?
- Subject: A core audio bug? Is there a work-around?
- From: John Draper <email@hidden>
- Date: Mon, 02 May 2005 12:23:41 -0700
Hi,
There appears to be a bug in the CoreAudio HAL in a user-error situation.
the inInputData AudioBufferList is supposed to be treated as read-only,
and when our IOProc gets called, the inInputData->mBuffers [0].mData
is NULL.
It'll stay that way for every callback by the HAL after that. the HAL
makes one version of that AudioBufferList that it then fills in with
recorded audio and sends to you over and over. so if it gets broken,
it stays broken. Only after re-starting the Mac will it be reset again
until another error occurrs.
Mike Thornburg, the author of MTCoreAudio framework has reported
this bug in NSSound to Apple, and as of 10.3.9 it has NOT been fixed
where the NSSound IOProc would do that very thing to the *input* side,
which it wasn't even using.
Has anyone else found this problem? If so, please let me know, because
this is a show stopper, and might result in the cancellation of our entire
project (And my Job).
An Instance of support with Apple has already been submitted. But I want
to know if others ran into this problem.
John
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