#!/bin/sh

# GStreamer only registers the VA-API elements (e.g. vah264enc) if a usable VA
# display is found while the plugins are scanned for the first time, and the
# result of that scan is cached in the user's registry. supervisord starts the
# X server and neko in the same pass, so without waiting here neko can scan the
# plugins before X (and therefore VA-API) is usable. The cache then lacks the
# encoder elements and every client connect fails with
# '(pipeline error) no element "vah264enc"'.
#
# Wait until VA is usable through X, then drop any stale registry, so that the
# first scan of this process happens with a working VA display.
i=0
while [ "$i" -lt 30 ]; do
  if vainfo >/dev/null 2>&1; then break; fi
  sleep 1
  i=$((i + 1))
done

if [ "$i" -ge 30 ]; then
  echo "neko-serve: VA-API was not usable after 30s, starting neko anyway" >&2
fi

rm -f "$HOME/.cache/gstreamer-1.0/registry."*

exec /usr/bin/neko serve "$@"