This patch improves the bluetooth profile autoswitch so that it works with any
application that wants to capture from a bluetooth device. To do so, a loopback
source filter is created per connected bluetooth device. If an application wants
to capture audio from such loopback source filter, the profile in the associated
bluetooth device is changed to HSP/HFP. If there isn't any application connected
to the loopback source filter, the profile switches back to A2DP.
When a manual change is applied, the store-or-restore-routes is the only
hook that gets executed for this event. In order to be able to test if a
route was changed, we need to reset all of them to 'active = false',
record the previous value of 'active' and test their difference.
Testing only the 'active' variable (and discarding 'prev_active') sounds
tempting here, but if a route is changed back and forth (from A to B
and back to A), there is nothing to reset the 'active' variable of A
when it gets deactivated and it will appear as previously active on
the second switch.
Related to: #551
* rename settings to make more sense
* split out monitor settings into a separate category
* add setting for restoring the default nodes in the node category
Do not continue iteration over all other profiles when
we found the profile set in the 'device.profile' property.
In other case we would overwrite this profile when
we find a best_profile.
This patch updates the deprecated policy-bluetooth.lua script so that it works
with the current version. The script has been moved into the device sub-folder,
and renamed to autoswitch-blueooth-profile.lua. The settings-manager is also
used for the configuration, and the actual configuration has been moved from
linkind.conf to bluetooth.conf.
Use the directory name and file name to construct the hook's name,
like a path. This way, when you see a hook name, it is clear where
to find that hook in the source code.
