This adds a VST3 host to obs-studio on Windows, macOS and Linux.
Only audio effects are enabled. Instruments and MIDI are not supported.
A maximum of 1 main bus, 1 sidechain input bus and 1 main output bus are
enabled.
Note that VST3 on linux only support X11. Although the SDK added Wayland
capability, it is too recent so there is yet no Wayland VST3 apart from
a demo from the SDK.
The cmake part was written by PatTheMav from obs dev team.
Co-authored-by: PatTheMav <PatTheMav@users.noreply.github.com>
Signed-off-by: pkv <pkv@obsproject.com>
