Re: Streaming OS X audio over network
Re: Streaming OS X audio over network
- Subject: Re: Streaming OS X audio over network
- From: Stéphane Letz <email@hidden>
- Date: Thu, 29 Jan 2004 11:31:17 +0100
Message: 9
From: Jeff Moore <email@hidden>
Subject: Re: Streaming OS X audio over network
Date: Wed, 28 Jan 2004 14:40:31 -0800
To: CoreAudio API <email@hidden>
>As far as the difference between a kernel driver and a user-land
>driver, the big difference is that in user-land, you are totally on
>your own with regard to talking to your hardware, dealing with IOProcs,
>and implementing all the various properties and semantics that folks
>have come to expect from a device vended through the HAL. The amount of
>work that goes into this is quite large. By writing a kernel driver,
>the HAL does all that work for you.
>
In a user space driver, and after QuickTime 6.4, it seems not possible
to make the driver behave as the default system drive anymore, when
kernel driver have no problems to do that.
What has to be done to make a user space driver behave like a kernel
driver to be selectable as the default system device?
Another issue is global system properties change : can a user space
driver notify the system of some global change?
Thanks
Stephane Letz
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