hyperion.ng/effects/udp.py

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import hyperion
import time
import colorsys
import socket
import errno
import struct
# Get the parameters
ListenPort = int(hyperion.args.get('ListenPort', 2801))
ListenIP = hyperion.args.get('ListenIP', "")
octets = ListenIP.split('.');
UDPSock = socket.socket(socket.AF_INET,socket.SOCK_DGRAM, socket.IPPROTO_UDP)
UDPSock.setblocking(False)
listen_addr = (ListenIP,ListenPort)
UDPSock.bind(listen_addr)
if ListenIP == "":
print "udp.py: Listening on *.*.*.*:"+str(ListenPort)
else:
print "udp.py: Listening on "+ListenIP+":"+str(ListenPort)
if len(octets) == 4 and int(octets[0]) >= 224 and int(octets[0]) < 240:
print "ListenIP is a multicast address\n"
# Multicast handling
try:
mreq = struct.pack("4sl", socket.inet_aton(ListenIP), socket.INADDR_ANY)
UDPSock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
except socket.error:
print "ERROR enabling multicast\n"
hyperion.setColor(hyperion.ledCount * bytearray((int(0), int(0), int(0))) )
# Start the write data loop
while not hyperion.abort():
try:
data,addr = UDPSock.recvfrom(4500)
# print data.strip(),len(data),addr
if (len(data)%3 == 0):
# print "numleds ",len(data)/3
ledData = bytearray()
for i in range(hyperion.ledCount):
if (i<(len(data)/3)):
ledData += data[i*3+0]
ledData += data[i*3+1]
ledData += data[i*3+2]
else:
ledData += bytearray((int(0), int(0), int(0)))
hyperion.setColor(ledData)
else:
print "not div 3"
except IOError as e:
if e.errno == errno.EWOULDBLOCK:
pass
else:
print "errno:", e.errno
print "udp.py: closing socket"
UDPSock.close()