#!/bin/bash

# Screen cast your desktop to Apple TV (airplay).
# Usage: airplay-client <server-address> <local-address>

# Untested.  Likely doesn't work.  Airplay V1 only.

if [[ "$SERVER_PORT" == "7000" ]]; then
  # We are the cgi script.
  echo 'Content-Type: video/h264'
  echo ''

  # TODO: figure out the correct video size
  ffmpeg -video_size 1920x1080 -framerate 30 -f x11grab -i :0.0 /dev/stdout
else
  server="$1"
  client="$2"

  # launch our streaming server
  mkdir -p cgi-bin
  ln -sfn "$PWD/$0" cgi-bin/airplay
  python -m http.server --cgi --bind 0.0.0.0 7000 &
  trap EXIT ERR INT TERM "kill $!"

  # Tell the TV to pull down our video
  body="Content-Location: http://$client:7000/cgi-bin/airplay
Start-Position: 0"
  curl "http://$server:7000/play" \
    -v \
    -H 'User-Agent: iTunes/10.6 (Macintosh; Intel Mac OS X 10.7.3) AppleWebKit/535.18.5' \
    -H "Content-Length: $(wc -c "$body")" \
    -h 'Content-Type: text/parameters' \
    --data-raw "$body"

  wait
fi