forked from protonphoton/LJ
73 lines
1.9 KiB
Python
Executable File
73 lines
1.9 KiB
Python
Executable File
#!/usr/bin/python3
|
|
# -*- coding: utf-8 -*-
|
|
# -*- mode: Python -*-
|
|
|
|
|
|
'''
|
|
|
|
This generator reads a frame from redis
|
|
v0.1.0
|
|
|
|
Use it to create feedback loops by writing to the same frame
|
|
or to copy the frame from someone else
|
|
|
|
LICENCE : CC
|
|
|
|
by cocoa
|
|
|
|
'''
|
|
|
|
from __future__ import print_function
|
|
import ast
|
|
import argparse
|
|
import json
|
|
import redis
|
|
import sys
|
|
import time
|
|
name="generator::fromRedis"
|
|
|
|
|
|
def debug(*args, **kwargs):
|
|
if( verbose == False ):
|
|
return
|
|
print(*args, file=sys.stderr, **kwargs)
|
|
|
|
|
|
argsparser = argparse.ArgumentParser(description="Dummy generator")
|
|
argsparser.add_argument("-k","--key",required=True,help="Redis key to look after",default=30,type=str)
|
|
argsparser.add_argument("-i","--ip",help="IP address of the Redis server ",default="127.0.0.1",type=str)
|
|
argsparser.add_argument("-p","--port",help="Port of the Redis server ",default="6379",type=str)
|
|
argsparser.add_argument("-f","--fps",help="Frame Per Second",default=30,type=int)
|
|
argsparser.add_argument("-v","--verbose",action="store_true",help="Verbose output")
|
|
args = argsparser.parse_args()
|
|
|
|
fps = args.fps
|
|
verbose = args.verbose
|
|
key = args.key
|
|
ip = args.ip
|
|
port = args.port
|
|
optimal_looptime = 1 / fps
|
|
debug(name+" optimal looptime "+str(optimal_looptime))
|
|
|
|
r = redis.Redis(
|
|
host=ip,
|
|
port=port)
|
|
|
|
while True:
|
|
start = time.time()
|
|
# Read from Redis
|
|
line = r.get(key)
|
|
# Decode as list of tuples
|
|
pointsList = ast.literal_eval(line.decode('ascii'))
|
|
# convert to list of lists
|
|
pointsList = [list(elem) for elem in pointsList]
|
|
# Convert to JSON string
|
|
line = json.dumps( pointsList )
|
|
debug(name,"Key:{} line:{}".format(key,line))
|
|
print(line, flush=True);
|
|
looptime = time.time() - start
|
|
if( looptime < optimal_looptime ):
|
|
time.sleep( optimal_looptime - looptime)
|
|
debug(name+" micro sleep:"+str( optimal_looptime - looptime))
|
|
|