Playable on linux x64
Both PortAudio and GstreamerSharp output now work on linux, PortAudio input works, video works as well.
Notes: still need to build libacinerella for x86, and I had to make some ugly changes because Acinerella doesn't work with recent ffmpeg versions
GstreamerSharp output uses a workaround that might cause problems in some places, still needs a proper fix
Graphics are still glitchy, multimonitor is broken
Need to check if it still builds and runs on windows