IOAudioEngine::performFormatChange cannot be triggered by change of I/O Buffer Size
IOAudioEngine::performFormatChange cannot be triggered by change of I/O Buffer Size
- Subject: IOAudioEngine::performFormatChange cannot be triggered by change of I/O Buffer Size
- From: "David Tan" <email@hidden>
- Date: Tue, 2 Dec 2008 16:22:49 +0800
Hi Apple,
On the device window of HALLab, there’re combo box of
Nominal Sample Rate and IO Buffer Size.
While I change the selection of Nominal Sample Rate,
I can get notification by IOAudioEngine::performFormatChange().
But it seems that change of IO Buffer Size cannot
make it.
My question is: what’s the IO Buffer Size really
means? Hardware or driver? And If I want to be informed in the driver of its
change, which method should I use.
Thanks a lot!
Best Regards,
David Tan,
Software Engineer,
Dextrys, Co., Ltd.
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