v0.1.0

First release.

A standalone FFGL host with NDI, OMT, Syphon and DeckLink I/O: route a source out
of a mixer that has no plugin interface, through a chain of FFGL plugins on the
GPU, and back in.

What is verified

• FFGL host core against nine real third-party plugins.
• The frame pump at 60 fps end to end over NDI and OMT, in any combination
  per side — NDI→NDI, OMT→OMT and NDI→OMT all proven by frame dumps.
• Syphon output against two implementations that are not this code:
  Resolume Arena's own Syphon client, and OBS's Syphon source.
• DeckLink SDI output on a real Duo 2, connector 1 cabled to connector 4:
  all eight colour bars in the right places, within a few counts of the
  BGRA → SDI 4:2:2 → BGRA round trip. A full chain — NDI in, a plugin on the
  GPU, SDI out — ran at 60.0 fps.

What is not

• Spout (Windows) has never been run against a receiver. It compiles, and
  that is the whole of the evidence.
• The DeckLink output carries no audio and no keying.
• Windows has been runtime-tested only under emulation in a VM.

Notes

The DeckLink output is compiled only when the build is configured with
-DDECKLINK_SDK_DIR; Blackmagic's SDK is not ours to redistribute. NDI and OMT
are loaded at run time and are never linked.

macOS builds are universal. Requires macOS 12 or later.