[libvirt] [PATCH v5 03/14] audio: -audiodev command line option: documentation

[Daniel P. Berrangé]

On Fri, Feb 22, 2019 at 03:22:35PM +0100, Gerd Hoffmann wrote:
>   Hi,
> 
> > >     * deprecated QEMU_AUDIO_ env vars
> > 
> > Libvirt does currently use these, so we'll need to update libvirt
> > code to use the new cli args
> 
> Note: The old vars will continue to work, and possibly it makes sense to
> keep at least QEMU_AUDIO_DRV (which I think is the only one used by
> libvirt) working a bit longer than the minimal deprecation period.

We can do the trivial replacement of QEMU_AUDIO_DRV with -audiodev
without much difficulty - just a matter of tweaking the CLI generator
and tests.

The full support with XML configurability doesn't need to block us
dropping use of QEMU_AUDIO_DRV.

> Also: This is a first step only, there is more in the pipeline, where
> you can assign sound cards to backends (simliar to -netdev). You might
> want wait for this to land before start working on libvirt support, or
> at least keep in bind this is coming when designing things.

Libvirt lacks proper support for the existing multi-seat features in
QEMU. This audio stuff might be a good motivation to finally implement
the full multi-seat feature set.

Regards,
Daniel
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