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User Space Audio Driver

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User Space Audio Driver

Subject: User Space Audio Driver
From: AI Developer <email@hidden>
Date: Wed, 06 May 2009 12:35:11 +0530

Hi,

We need to write an audio device driver where the actual hardware is connected over Ethernet (we use raw ethernet frames, using a proprietary protocol).

We're trying to decide whether to write an I/O Kit based kernel driver/kext (IOAudioDevice based) or to create a user space driver (AudioHardwarePlugin).

It seems that most existing drivers are I/O Kit based kexts, even when the underlying device access mechanism is available in user-space (USB, 1394).

From what I understand, it's much more work to create a user space driver (or maybe that's a subjective view, as I've written a number of I/O Kit based kexts).

Also, it seems that there's very little documentation available on creating the user space driver.

Although there is the SampleHardwarePlugin example in the CoreAudio SDK.

Is this a good starting point? Are there any other examples or source of documentation for writing a user space driver? Any limitations that we need to be aware of?

Any other advice on making this decision would be appreciated!

Thanks.
Devendra.
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