[pulseaudio-discuss] module-switch-on-connect: handling virtual sinks
georg at chini.tk
Sun Nov 12 14:05:02 UTC 2017
On 12.11.2017 14:36, wellington wallace wrote:
> Another thing that would work is telling Pulseaudio that null sinks
> created by PulseEffects should never be used as fallback devices. If
> this was a null sink property I could set it in PulseEffects code and
> the user would not have to mess with Pulseaudio's configuration.
> As we are talking about null sinks I would like to ask one more
> question. Is it possible to change a null sink rate after it was
> created? I searched in the libpulse api docs but I could not find a
> way. I am asking because at PulseEffects startup I set the null sink
> rate to the same rate of the current fallback device. If the user
> changes the fallback device to one with different sampling rate while
> PulseEffects is open we will have unnecessary resampling as the null
> sink is using the rate of the previous device.
> Best regards
Please don't top post. Does that mean the original question was not
about virtual sinks
but about the null sink? The null sink is not counted as a virtual sink
and the patch I sent
is useless in that case. The null sinks could however be excluded in
module-switch-on-connect by a similar approach.
I guess it would also be possible to set some "do-not-use-as-default"
property on a sink
that could be parsed by the default sink selection process, but that
would not only affect
module-switch-on-connect but would also need to be considered in the core.
> On Sat, Nov 11, 2017 at 10:03 AM, Михаил Новоселов, Думалогия
> <mikhailnov at dumalogiya.ru <mailto:mikhailnov at dumalogiya.ru>> wrote:
> Yes, of course, it's possible to unload module-switch-on-connect,
> but that is breaking the existimg user setup.
> "a command line switch could be added
> to the module so that it ignores virtual sinks" Will be best. Does
> this flag exist now?
> 11 ноября 2017 г. 14:26:21 GMT+03:00, Georg Chini <georg at chini.tk
> <mailto:georg at chini.tk>> пишет:
> On 11.11.2017 05:28, Михаил Новоселов, Думалогия wrote:
> Hello, PulseEffects, an application, that can apply
> different effects or equalize both input and output sound,
> cannot work properly when module-switch-on-connect is on.
> PulseEffects creates a virtual sinks, but PulseAudio's
> module-switch-on-connect makes it a default sinks
> automatically what severely breaks the logic of
> PulseEffect's work. Please see
> <https://github.com/wwmm/pulseeffects/issues/99> 1) Can we
> specify that the created sink is a virtual one? 2) Maybe
> there are other ways to prevent module-switch-on-connect
> from making a newly created virtual device a default one?
> I wrote the script Dumacast
> <https://github.com/mikhailnov/dumacast> (first of all for
> my company's (Dumalogiya, http://думалогия.рф
> <http://xn--80agbsneq0b4h.xn--p1ai>) internal usage), and
> starting with the newest version of Ubuntu, where
> module-switch-on-connect is on, I ran into the same
> troubles. My script
> creates virtual sinks via pactl (lines 135-149), and they
> are also made default and break the logic of how the
> script works. I currently have no idea how to handle it
> without unloading module-switch-on-connect. I tried both
> Ubuntu's 17.10 default PulseAudio and built from dEbian
> sources PulseAudio 11, the situation is the same with them
> both. What can be done?
> Do you really need module-switch-on-connect? If not, you could just
> check with
> "pactl list modules short" if the module is loaded and unload it prior
> to starting
> your application. You can also remove it fromdefault.pa <http://default.pa>, so that it
> never gets
> If you need module-switch-on-connect, a command line switch could be added
> to the module so that it ignores virtual sinks. The default behavior
> however can
> not be changed, because other applications might rely on the current setup.
> Простите за краткость, создано в K-9 Mail.
> Prof.° Wellington Wallace Miguel Melo
> CEFET/RJ Uned Nova Iguaçu
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the pulseaudio-discuss