Custom Qt SPICE viewer

Derek Linrequested to merge
kenoi/karton:work/dereklin/vmviewer into master

This merge request implements #8 (closed): a basic Qt SPICE viewer. This allows users to interact with a VM through input (mouse, keyboard, etc...) as well as see its display and receive audio. As planned, this is rendered onto a KDE-native window and virt-viewer is no longer required as a dependency.

Note: Previous VMs configured in Karton will not have audio. You can either add a device in the XML file for create a new one with this branch.

  • Uses virsh CLI (dom display) to get libvirt SPICE URI. This is my current solution as I had set Karton VMs to have autoport for graphics, thus the SPICE port is assigned dynamically on VM launch
  • Implemented SPICE client to connect to a port and render VM graphics on QQuickItem
  • Implemented keyboard press and mouse click, hover, scroll forwarding
  • Uses QEMU-generated scancode table for converting evdev to PC XT
  • Added audio device support to libvirt domain XML generator
  • Implemented SPICE audio handling, writing to QAudioSink
  • Added full-screen button, and proper resizing/scaling of display

Previously worked in here. This is a new branch after rebasing.

TODO:

  • mouse input
  • keyboard input
  • use qemu input table
  • scroll input
  • resizable viewer
  • drag input
  • support switching between display & multiple active displays, properly find correct vm to show
  • audio
  • inactive window fix for multiple instances

After:

  • optimize rendering with gl-scanout
  • investigate bad text rendering
  • microphone input (record channel)
  • webcam
  • shared file folder
  • shared clipboard
  • usb passthrough
Edited by Derek Lin

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