Re: [PATCH v2] docs: domain: document legacy audio for qemu
On Wed, Jan 12, 2022 at 01:42:00PM +0100, Olaf Hering wrote:
Adding a blurb like this was forgotten in 2009.
How did you come up with 2009? Not questioning it, just curious :)
+Note:
+If no ``<audio/>`` element is defined, and the ``graphics`` element is set to
+either 'vnc' or 'sdl', the libvirtd or virtqemud process will honor the
following
+environment variables:
+
+* ``SDL_AUDIODRIVER``
+
+ Valid values are 'pulseaudio', 'esd', 'alsa' or
'arts'.
+
+* ``QEMU_AUDIO_DRV``
+
+ Valid values are 'pa', 'pulseaudio', 'none', 'alsa',
'coreaudio', 'jack',
+ 'oss', 'sdl', 'spice' or 'file'.
The fact that we accept "pulseaudio" as an alias for "pa" and expect
"file" instead of "wav" are an unfortunate implementation detail and
a bug respectively. I have just posted patches addressing the
latter[1], and I don't think the former should be documented even
though it's technically accepted, especially considering that we're
talking about legacy settings and we want users to use the <audio>
element instead.
For the SDL part, since we don't have to deal with any of the
conversion shenanigans in that case, I would suggest avoiding the
list and using something like
Valid values are those accepted for the ``driver`` attribute of
the `SDL audio backend <#sdl-audio-backend>`__.
instead. But your version works fine too if you're keen on keeping
it as is :)
[1] https://listman.redhat.com/archives/libvir-list/2022-January/msg00738.html
--
Andrea Bolognani / Red Hat / Virtualization