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gifFlut.py
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gifFlut.py
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#!/bin/python
################## GIF to Pixelflut sender ########################
#
# Author: LeoDJ
# Repository: https://github.com/LeoDJ/gifFlut
#
# Compliant with Pixelflut servers from defnull (https://github.com/defnull/pixelflut)
#
# ToDo:
# - find out why PILlow fucks up some .GIF files
# - improve performance of data sending (if necessary)
# - OPTIONAL: improve performance of image conversion
#
###################################################################
import socket
import sys
import pickle
import os
import threading
import time
import lzma
import ntpath
import argparse
import gifToPF
renderOutputPath = "rendered/"
renderedFileSuffix = ".pkl"
renderedFileSuffixCompr = ".pklz"
reconnectInterval = 0.1
# appends file extension based on compression
def saveConvertedImage(obj, filename, compressed=True):
if not os.path.exists(renderOutputPath):
os.makedirs(renderOutputPath)
if compressed:
filename += renderedFileSuffixCompr
else:
filename += renderedFileSuffix
with open(filename, 'wb') as output:
if(compressed):
with lzma.LZMAFile(output, "w", filters=[{'id': lzma.FILTER_LZMA2, 'preset': 1}]) as lzf:
lzf.write(pickle.dumps(obj, pickle.HIGHEST_PROTOCOL))
else:
pickle.dump(obj, output, pickle.HIGHEST_PROTOCOL)
def loadConvertedImage(filename):
compressed = filename.endswith(renderedFileSuffixCompr)
with open(filename, 'rb') as input:
if(compressed):
with lzma.LZMAFile(input, "r") as lzf:
return pickle.loads(lzf.read())
else:
return pickle.load(input)
def getConvertedImage(imgPath, xoff=0, yoff=0, compr=True, regen=False, noCache=False, algo=0):
imgFileName = ntpath.basename(imgPath)
# load cached file directly
if imgFileName.endswith(renderedFileSuffix) or imgFileName.endswith(renderedFileSuffixCompr):
data = loadConvertedImage(imgPath)
else:
foundCachedImage = False
# load cached version of file if exists
for f in os.listdir(renderOutputPath):
if(f.startswith(imgFileName)):
foundCachedImage = True
cachedFile = f
break
if(not foundCachedImage or regen): # convert image, if no cached file exists
data = gifToPF.main(imgPath, xoff, yoff, algo)
if not noCache:
print("saving converted image... ")
saveConvertedImage(data, renderOutputPath + imgFileName, compr)
print("done.")
else:
print("Already found a converted image for \"" + imgFileName +
"\". Using the cached version: " + renderOutputPath + cachedFile)
print(
"If you do not want to load the cached file, simply set the regeneration parameter \"-r\"")
print("Loading cached file...")
data = loadConvertedImage(renderOutputPath + cachedFile)
print("done.")
return data
def sendData(part=0, numParts=1):
frameLen = len(frameBuffer[curFrame])
partLen = int(frameLen / numParts)
partStart = part * partLen
partEnd = partStart + partLen - 1
if part == numParts - 1: ##last frame must be handled extra
partEnd += (frameLen % numParts)
# print(frameLen, partLen, partStart, partEnd)
while(running):
for lineNum in range(partStart, partEnd + 1):
if running:
try:
sock[part].sendall(frameBuffer[curFrame]
[lineNum].encode("ascii"))
except (ConnectionResetError, ConnectionAbortedError, OSError, NameError, IndexError, TimeoutError):
time.sleep(0.1)
connect(part)
def connect(socketId=0):
global sock, lastTimeCalled, currentlyConnecting
# prevent multiple reconnects from threads and also do reconnect interval timing
if time.time() - lastTimeCalled >= reconnectInterval or not currentlyConnecting:
currentlyConnecting = True
lastTimeCalled = time.time()
if pxHost.count(":") < 2:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
else:
s = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
sock.insert(socketId, s)
try:
print("connect " + str(socketId))
if pxHost.count(":") < 2:
sock[socketId].connect((pxHost, int(pxPort)))
else:
sock[socketId].connect((pxHost, int(pxPort), 0, 0))
currentlyConnecting = False
except (ConnectionRefusedError, TimeoutError):
print("Connection refused")
currentlyConnecting = False
except socket.gaierror as e:
print("Socket error", e, e.reason)
currentlyConnecting = False
def parseArgs():
parser = argparse.ArgumentParser()
parser.add_argument("host")
parser.add_argument("port", type=int)
parser.add_argument("imageFile")
parser.add_argument("-x", "--xoffset", type=int, default=0)
parser.add_argument("-y", "--yoffset", type=int, default=0)
parser.add_argument("-t", "--threads", type=int, default=1,
help="number of threads for data sending")
parser.add_argument("-u", "--nocompression", action='store_const', const=True,
default=False, help="save cache file uncompressed")
parser.add_argument("-r", "--regenerate", action='store_const', const=True,
default=False, help="overwrite cached file")
parser.add_argument("-n", "--nocache", action='store_const', const=True,
default=False, help="disable writing cache file")
parser.add_argument("-a", "--algorithm", type=int, default=0,
help="algorithm selection 0=lineByLine, 1=randomPixel")
args = parser.parse_args()
return args
def main():
args = parseArgs()
global pxHost, pxPort, lastTimeCalled, sock, currentlyConnecting
pxHost = args.host
pxPort = args.port
lastTimeCalled = 0
sock = []
currentlyConnecting = False
global frameBuffer, running, curFrame
data = getConvertedImage(args.imageFile, args.xoffset, args.yoffset,
not args.nocompression, args.regenerate, args.nocache, args.algorithm)
frameBuffer = data['frameBuffer']
frameTime = data['duration']
running = True
curFrame = 0
threads = []
for t in range(args.threads):
thrd = threading.Thread(target=sendData, args=(t, args.threads))
threads.append(thrd)
time.sleep(0.15)
thrd.start()
try:
while(running):
if(frameTime > 0):
i = curFrame + 1
# safely increment curFrame, because is global and might cause out of bounds exception if read at the wrong time
if i >= len(frameBuffer):
i = 0
curFrame = i
time.sleep(frameTime / 1000)
except KeyboardInterrupt:
running = False
print("stopping...")
if __name__ == "__main__":
main()