1 files changed, 88 insertions, 0 deletions
diff --git a/osc2light.py b/osc2light.py
new file mode 100644
index 0000000..0746202
--- /dev/null
+++ b/osc2light.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python
+
+import liblo
+import socket
+import struct
+import sys
+
+class LightServer(object):
+    class Unknown(Exception):
+        def __str__(self):
+            return 'Unknown message'
+
+    def __init__(self, port, interface):
+        self.interface = interface
+        self.raw_socket = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(0x88b7))
+        self.osc_server = liblo.Server(port)
+        self.osc_server.add_method(None, None, self.handle_message)
+
+    def run(self):
+        while True:
+            self.osc_server.recv()
+
+    def handle_message(self, path, args, types, src):
+        try:
+            prefix = '/dali'
+            if path.startswith(prefix):
+                self.handle_dali(path[len(prefix):], args, types, src)
+            else:
+                raise self.Unknown()
+        except Exception, e:
+            print >>sys.stderr, "Error processing message '%s' from '%s': %s" % (path, src.get_url(), e)
+
+    def handle_dali(self, path, args, types, src):
+        prefix = '/lamps'
+        if path.startswith(prefix):
+            self.handle_dali_lamp(path[len(prefix):], args, types, src)
+        else:
+            raise self.Unknown()
+
+    def handle_dali_lamp(self, path, args, types, src):
+        path_parts = path.split('/')
+        while len(path_parts) and not path_parts[0]:
+            path_parts = path_parts[1:]
+        lamp_number = int(path_parts[0])
+        self.handle_lamp(lamp_number, '/'.join(path_parts[1:]), args, types, src)
+
+    def handle_lamp(self, lamp, path, args, types, src):
+        if path == 'bright':
+            self.handle_lamp_bright(lamp, args, types, src)
+        else:
+            raise self.Unknown()
+
+    def handle_lamp_bright(self, lamp, args, types, src):
+        arguments = zip(args, types)
+        if not arguments:
+            raise ValueError("Brightness expects a value")
+        if arguments[0][1] in 'ih':
+            brightness = arguments[0][0]
+        elif arguments[0][1] in 'fd':
+            brightness = int(255 * arguments[0][0])
+        else:
+            raise ValueError("Unexpected Brightness value")
+
+        if brightness < 5:
+            brightness = 0
+        else:
+            brightness = 70 + float(brightness) * ((255.0 - 70) / 255)
+            brightness = int(brightness)
+
+        if brightness >= 255:
+            brightness = 254
+
+        src = '\x00\x04\x23\xb6\xde\xe4'
+        dst = '\xff\x3a\xf6CAN'
+        proto = 0x88b7
+        oui = '\x00\x80\x41'
+        subp = 0xaaaa
+        typ = 2
+        buf = struct.pack('>6s6sH3sHB', dst, src, proto, oui, subp, typ)
+
+        addr = 0xcc080440 + lamp
+        buf += struct.pack('>IBB', addr, 1, brightness)
+
+        self.raw_socket.sendto(buf, (self.interface, 0))
+
+if __name__ == '__main__':
+    server = LightServer(4243, 'bond0.4')
+    server.run()