[pulseaudio-discuss] Potential module: persistent-sink
krellan at krellan.com
Sun Dec 7 00:14:52 PST 2008
Chris Hamilton wrote:
> Is it possible to have a stream stay connected to a sink, be rescued,
> but then be reconnected if the sink that disappeared becomes available
> once again?
> Something similar to rescue-stream and always-sink, but that will try to
> reconstruct the previously existing sink in the meantime. (For example,
> if it was a network sink, it'll keep trying to reconnect to the host if
> it went down).
I was thinking along similar lines.
I'd like to see a priority list of sinks, that the user could manipulate
and set into the desired order.
For example, a priority list could be:
1. USB headphones
2. USB speakers
3. Motherboard's onboard audio
4. Null (discard)
If the user configured PulseAudio in this way, sound would default to
being played through the USB headphones.
If the USB headphones were unplugged, sound would be redirected to USB
If the USB speakers were also unplugged, sound would be redirected to
the motherboard's onboard audio chip.
If there was a problem with the onboard audio, sound would finally go to
the null sink, and be discarded. Under no circumstances would user
applications receive an error or block when they try to play sound!
Everything would "just work", even if there is no actual audio being
played. This would make for a more pleasant user experience when
running programs that generate audio (i.e. Flash won't deadlock the
entire web browser when it tries to open an audio device that's in use).
When the user plugs in USB headphones again, the sound immediately and
smoothly returns to the USB headphones.
When the user plugs in USB speakers again, nothing happens, because
sound is already being played through the USB headphones (higher in the
priority list). If the user were to later unplug the USB headphones
again, though, sound would immediately start playing through the USB
Does this sound like a good model to follow? This is only an example
scenario, of course, and the user will need to be free to configure
their priority list in any manner they see fit.
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