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Re: performFormatChange
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Re: performFormatChange


  • Subject: Re: performFormatChange
  • From: Jeff Moore <email@hidden>
  • Date: Tue, 15 Apr 2003 17:53:22 -0700

It depends on what the state change is:
- If the state in question is represented by an IOAudioControl, then one of the control notifications should be sent.
- If the state in question is the format of a specific stream, then the format notification should be sent specifying the stream.
- If the state in question is the sample rate of the device or the format of multiple streams, then a format notification should be sent for each stream.
- If the state is something else, then the major engine change notification should be sent.

In all cases, your driver should use the appropriate methods in the IOAudio family to send the notifications.

On Tuesday, April 15, 2003, at 05:02 PM, Robert Penland wrote:

If a state change is detected internal to a core audio driver, what is the
proper method for alerting any user land clients? Can I just call
performFormatChange internal to my driver?

Thanks,
Rob
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--

Jeff Moore
Core Audio
Apple
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References: 
 >performFormatChange (From: Robert Penland <email@hidden>)

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