Re: Sampling Rate Master
Re: Sampling Rate Master
- Subject: Re: Sampling Rate Master
- From: Jeff Moore <email@hidden>
- Date: Wed, 19 Oct 2005 16:53:07 -0700
No, the family should take care of the basic notifications, but if
changing format causes the stream layout to change or controls to
disappear or reappear, then you are also going to have to send a
major engine change notification by bracketing the changes with
beginConfigurationChange()/completeConfigurationChange().
You can see an example of this in the AudioReflectorDriver in our SDK.
On Oct 16, 2005, at 11:44 PM, BlazeAudio Developer wrote:
Jeff,
Thank you for the quick response!
I think that makes things easier on our side.
One more question: Do we have to take care of sending sampling rate
change notifications or is that done by the IOAudioFamily code? The
sample driver code does not seem to send any notifications when
handling the performFormatChange call.
Thanks.
Devendra.
At 11:10 PM 10/14/2005, Jeff Moore wrote:
It might be possible for the driver to know who set the sample rate,
but I can't imagine a situation where it would be important. All
requests to change the sample rate are equal. Drivers should just
process the requests to change sample rate in the order in which they
come in and send the proper set of notifications in response.
On Oct 13, 2005, at 9:20 PM, BlazeAudio Developer wrote:
Hi,
[This is a question from the driver side of things!]
If there are more than one CoreAudio applications trying to change
the sampling rate of a device (CoreAudio Engine), then is there a
way to detect which application has made the request?
How should the driver decide, or should the driver play no role?
Thanks.
Devendra.
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