Mailinglist Archive: opensuse-packaging (139 mails)

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Re: [opensuse-packaging] PulseAudio plans for suse 11.0
  • From: Wade Berrier <wberrier@xxxxxxxxxx>
  • Date: Thu, 13 Mar 2008 14:40:13 -0600
  • Message-id: <1205440813.10300.75.camel@xxxxxxxxxxxxx>

On Wed, 2008-03-12 at 23:51 +0100, Christian Morales Vega wrote:
2008/3/12, Wade Berrier:
Hi,


On Wed, 2008-03-12 at 18:07 +0100, Ludwig Nussel wrote:
> Marcus Rueckert wrote:
> > On 2008-03-12 17:45:05 +0100, Christian Morales Vega wrote:
> > > In any case what openSUSE will do is something must be cleared.
> > > For what I understood Gnome is going to use PulseAudio yes or yes.
> > > Upstream will port their apps to PulseAudio and openSUSE can't patch
> > > all of them, correct?
> > > GStreamer, xine... they can't have a default output for KDE and
> > > another one for Gnome. KDE4 will use Phonon, that can use xine or
> > > gstreamer like backend. Will KDE4 apps use PulseAudio when Phonon
uses
> > > gstreamer and ALSA directly when Phonon uses xine? In the first case
> > > apps will have *two* per application volume controls (Phonon and
> > > PulseAudio)?
> > > Without a clear path this could be very confusing.
> >
> > ideally pulseaudio and phonon would be just wrapper for that
> > functionally inside alsa.
>
> Quoting the fedora-devel mail:
> > 6. If you have an application that uses ALSA, please make sure that it
> > doesn't hardcode ALSA driver names (i.e. something like "hw:0"), it
> > should use "default" instead, which is now being redirected to
> > "pulse", our plugin for libasound. Hardcoding ALSA device names
> > (besides "default") is a bug in your application anyway, so here
> > you have yet another reason to fix that!
>
> So there is an alsa plugin and if an application normally uses alsa
> it will transparently use pulseaudio. No application change
> required. Sounds sane to me. I wonder whether that also works for
> applications that support surround sound such as quake4 though.


I'm not sure either... but, if it fails, this would be an instance where
the real quake binary could be wrapped in a shell wrapper that also runs
'pasuspender' beforehand so that quake could use the hardware directly.

I brought this up on opensuse-packaging with the hope of preconfiguring
all apps (patching our packages to: create wrappers, modify default
config files, etc... ) so they would work with pulseaudio.

The goal: to be running any desktop environment, start up any
application that uses sound, have sound actually work (even when using a
cheap sound card that does no hardware mixing), and get all the features
of pulseaudio.

(I'm currently using one of those cheap cards, but am almost frustrated
at the point of buying a sound card that can mix 32 streams in hardware
just so I can hear pidgin beeps and hear flash video at the same time :)

You can't use the software mixing argument. dmix *works*, perhaps
doesn't works in all cases, but works. You have a sound card where
dmix doesn't works (isn't being used?) and PulseAudio mixing does?
Fine. But can you say for sure that PulseAudio mixing works for
*everybody*? Because a single user for which PulseAudio mixing doesn't
works and dmix works is enough to invalidate this argument.

You're right... it's not a differentiating argument, but it is another
available solution.

(You are a Novell employer? So just search Takashi Iwai in the
building and he will fix your dmix problem for a free breakfast ;-)

Heh, unfortunately he's probably in Germany, and I'm in Provo. But I
wouldn't mind buying breakfast for him some time as he's fixed several
other issues with some of my sound cards.


I'm not against PulseAudio. But before patching packages like general
rule we should know the KDE Team posture about it. If it still is the
"it's just a Gnome thing" from
http://lists.opensuse.org/opensuse-factory/2007-11/msg00175.html the
only packages that should be touched are the ones that the Gnome Team
is already touching:
http://en.opensuse.org/GNOME/Ideas/11.0/PulseAudio

Thanks for the links! I didn't know these existed...

Wade
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