libxcoder is the userland library of the NETINT Quadra video processing
units (VPU), a family of PCIe cards that decode, encode (H.264, H.265, AV1,
JPEG), scale and run AI inference on video in hardware. FFmpeg and GStreamer
plugins use it to drive the card.

The card is a standard NVMe device: libxcoder sends its commands through
the Linux-compatible passthrough ioctls of nvme(4). No extra kernel driver
is needed.
