Re: clipping problems
Re: clipping problems
- Subject: Re: clipping problems
- From: Jeff Moore <email@hidden>
- Date: Thu, 18 Apr 2002 11:03:16 -0700
on 4/18/02 1:44 AM, Jason Bagley <email@hidden> wrote:
>
While developing a multichannel PCI audio driver, I'm occassionally
>
getting the following messages in the system log. Once they start, they
>
don't stop until I reboot. They are accompanied by clicks in the audio,
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playback and input.
>
>
mach_kernel: IOAudioStream[0x1cf1500]::clipIfNecessary() - adjusting
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clipped position to (c6b4,ac)
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>
mach_kernel: IOAudioStream[0x1cf1400]::clipIfNecessary() - Error:
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attempting to clip to a position more than one buffer ahead of last clip
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position (c6b3,ac)->(c6b4,f1).
>
>
Any ideas what causes this or what I can do to alleviate it when it starts?
While I can't speak to what these messages mean in terms of the Family's
code, but my bet is that your time stamps are not accurate enough. This
causes the HAL to run faster or slower than it should be resulting in
dropped samples. The second message really makes me think that this is true.
--
Jeff Moore
Core Audio
Apple
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