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Re: IOAudioStream::clipIfNecessary() - Error???
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Re: IOAudioStream::clipIfNecessary() - Error???


  • Subject: Re: IOAudioStream::clipIfNecessary() - Error???
  • From: Jeff Moore <email@hidden>
  • Date: Mon, 15 Dec 2008 11:46:34 -0800

I have never known this log message to be indicative of an IO problem. In fact, it is more likely that the app experiencing the glitch had it's problem first. Then, after the HAL resynchronized as part of recovering from the glitch, it triggered this log message when it resumed calling the kernel trap.


On Dec 14, 2008, at 11:12 PM, Stephan M. Bernsee wrote:


Hi Jeff,

thank you for your reply. So, does this mean that this message is not related to the audio hiccup that we are observing at roughly the same point in time?

Thanks
Stephan

This log message is harmless. All it is saying is that a new client is
starting IO at a point in time that has already been mixed/clipped by
the driver, which is something that is handled internally by the
IOAudio family.


On Dec 9, 2008, at 11:21 PM, Stephan M. Bernsee wrote:

when working with our app we are seeing occasional audio drop outs
along with the console message

12/9/08 11:28:24 PM kernel
IOAudioStream[0x6e48300]::clipIfNecessary() - Error: attempting to
clip to a position more than one buffer ahead of last clip position
(49,3bc9)->(4c,17ae).

every now and then. Does any of you have any idea where this might come from, what it means and where we should start looking for a potential bug in our code?



--

Jeff Moore
Core Audio
Apple


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References: 
 >Re: IOAudioStream::clipIfNecessary() - Error??? (From: "Stephan M. Bernsee" <email@hidden>)

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