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#!/usr/bin/env python
#
# Read ETI data from standard input, in RAW, STREAMED or FRAMED format, and transmit
# it over UDP to several receivers, using forward erasure correction and sequences
# numbering to reorder packets.
#
# Copyright (c) 2012, Matthias P. Braendli <matthias@mpb.li>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
from etireader import *
from etifec import *
from socket import *
import sys
import os
import time
import zfec
import struct
import StringIO
PORT = 12525
udpdestinations = [('localhost', PORT)]
sock = socket(AF_INET, SOCK_DGRAM)
reader = EtiReader("../eti/streamed.eti")
seqnr = 0
k = 40
m = 60
etifec = ETI_Fec(k, m)
while True:
seqnr += 1
# Read four ETI frames
try:
etigroup = "".join([reader.next() for i in range(4)])
except EtiReaderException as e:
print("End of file reached")
break
time.sleep(0.002)
#print("Seqnr {0}".format(seqnr))
tx_packets = etifec.encode_eti_group(etigroup, seqnr)
for packet in tx_packets:
for dest in udpdestinations:
sock.sendto(packet, dest)
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