The prefix was used to filter the properties when loading and
saving but since the conversion to the core provided functions, this
feature is not longer available.
It's not exactly a problem, we could implement the filtering ourselves
afterwards but there is little point because we just ignore the unknown
items and never write invalid items.
1) detect port changes
2) restore or save port changes
3) if port changes:
check and restore the best profile
else check and restore the best ports
4) if profile changed, check and restore best ports
See #533
See #708
First check all the routes to see if anything changed. If there is
a change check if we need a profile switch.
Then check all the active routes and restore state when they changed.
Add save property to Profile and Route params to notify the session
manager that they should be saved. Let the session manager only save
the Profile and Routes with the save flag.
Make pulse-server set the save flag on Profile and Route changes.
The result is that we can make a difference between user requested
changes and automatical changes and only remember the user preferences.
When a port changes availability, first check if we need to perform
a profile switch, if not select the new best port.
Disable automatic port configuration in acp and move the logic
to the session manager.
Implement initial port selection and restore on profile activation.
Implement route switch when unavailable
Implement port settings save.
Keep track of active profile in default-routes so that we can restore
the prefered routes later.
Keep track of all active routes in an array. There can be more than
one active route per direction.
New routes will get their volume restored. Route changes will be saved.
Follow the active input/output routes. If the route changes, restore
the previously saved settings. If only the properties change, save
them to be restored later.
Fixes#402
Save settings as jason and use a small json compatible tokenizer to
load settings instead of our own less flexible format.
Save settings with a prefix and filter out entries without prefix
Listen for changes in restore.stream metadata and update properties.
