Quick and dirty virtual xserver forwarded to ledpanel, enjoy

launch-led

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+#!/bin/bash
+#
+# Usage: PULSE_SERVER=sound.waw.hackerspace.pl ./launch-led projectM-pulseaudio
+#
+
+trap 'pkill -P $$' SIGINT
+
+Xephyr -br -ac -noreset -screen 128x128 :1 &
+
+export DISPLAY=:1
+
+(while true; do
+    gst-launch-1.0 -q ximagesrc use-damage=0 show-pointer=false endx=128 endy=128 ! queue ! videoconvert ! videorate  ! video/x-raw,format=RGB,width=128,height=128 ! fdsink  | python send.py 10.8.1.26 128 128
+    sleep 0.5
+done) &
+
+# ...resize current window to screen size
+(#while true; do
+    sleep 2
+    xdotool search --onlyvisible . windowmove 0 0 windowsize 129 129
+    sleep 10
+    xdotool search --onlyvisible . windowmove 0 0 windowsize 129 129
+#done
+) &
+sleep 1
+
+$*
+
+pkill -P $$

send.py

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+import sys
+import struct
+import socket
+
+if __name__ == "__main__":
+    target = sys.argv[1]
+    width = int(sys.argv[2])
+    height = int(sys.argv[3])
+
+    size = width*height*3
+
+    prefix = struct.pack(
+        '!BBHBB', 0x9c, 0xda, size, 0, 1)
+
+    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+
+    while True:
+        buf = prefix + sys.stdin.read(size) + '\x36'
+        if len(buf) == 7:
+            exit(1)
+        sock.sendto(buf, (target, 65506))