[Differential] [Request, 172 lines] D2270: Try to be more clever about what sink to use for volume control

[drosca (David Rosca)]

drosca created this revision.
drosca added a reviewer: Plasma.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.

REVISION SUMMARY
  This changes the applet to display volume icon and control volume
  through scroll / global shortcuts of "preferred" sink.
  
  Preferred sink is currently chosen according to these rules:
  
  - if there is only one sink, that sink is preferred
  - if there is some sink that is currently playing some sound, that sink is preferred (if default sink is playing sound, default sink is used instead)
  - if there is some sink that is currently idle (there are streams on the device, but not currently playing), that one sink is preferred (same exception for default sink is used here as in case above)
  
  This should help with changing the volume of correct audio device in
  most cases.
  
  BUG: 365771

REPOSITORY
  rPLASMAPA Plasma Audio Volume Applet

BRANCH
  preferred-devices (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D2270

AFFECTED FILES
  applet/contents/ui/main.qml
  src/device.cpp
  src/device.h
  src/pulseaudio.cpp
  src/pulseaudio.h

EMAIL PREFERENCES
  https://phabricator.kde.org/settings/panel/emailpreferences/

To: drosca, #plasma
Cc: plasma-devel, jensreuterberg, abetts, sebas
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