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bmd_router_control.py
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bmd_router_control.py
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import telnetlib
from datetime import datetime
import argparse
# This program is an importable way to control the blackmagic cleanswitch 12x12 videohub
# Written by Michael Gillett, 2021
# Based on the Developer SDK provided by Blackmagic Design
# https://www.blackmagicdesign.com/developer/
# This is the base program, but this is best used when imported into another automation program
# You can also use this from the terminal too.
# for example:
# python3 ./bmd_router_control.py -a 192.168.1.30 -s 12 -d 1
parser = argparse.ArgumentParser(
description='Set and Get Blackmagic VideoHub configurations.')
parser.add_argument('-d', '--destination', dest='destination',
type=int, nargs=1, help="Get cross point source for destination")
parser.add_argument('-s', '--source', dest='source', type=int, nargs=1,
help="Set cross point source for destination (defined by -d)")
parser.add_argument('-a', '--address', dest='address', type=str,
nargs=1, help="IP address or DNS name of the video router")
args = parser.parse_args()
def generate_timestamp() -> str:
return str(datetime.now())
class blackmagic_router_control():
def __init__(self, host, port: int = 9990, timeout_seconds: int = 5) -> None:
self.timeout = timeout_seconds
self.host = host
self.port = port
def init_connection(self) -> bool:
# need to add a try and except error here for bad ip, port
try:
self.tn = telnetlib.Telnet(self.host, self.port, self.timeout)
print(
f'{generate_timestamp()} | Established connection with {self.host}:{self.port}')
return True
except Exception as e:
print(
f'{e}: Unable to connect to video router. Please reconfigure and try again.\n')
return False
# routing_commands need to be a list of touples.
# ie: [(destination, source), (destination, source)]
def route_inputs(self, routing_commands: list = []) -> None:
print(f'{generate_timestamp()} | Routing Inputs: {routing_commands}')
cmd = 'video output routing:\n'
for pair in routing_commands:
cmd += f'{pair[0]-1} {pair[1]-1}\n'
cmd += '\n' # the router requires 2 blank lines at the end of every command
self.execute(cmd)
def route_single(self, destination: int, source: int) -> None:
print(f'{generate_timestamp()} | Routing {source} to {destination}')
cmd = f'video output routing:\n{destination-1} {source-1}\n\n'
self.execute(cmd)
def execute(self, command: str) -> bool:
if self.init_connection():
# execute command
self.tn.read_until(b"END PRELUDE:")
print(f'Executing command: {command}')
self.tn.write((command).encode('ascii'))
self.tn.read_until(b"ACK", self.timeout)
print(
f'{generate_timestamp()} | Switch command confirmed by router at {self.host}:{self.port}')
# close connection
self.tn.close()
return True
else:
return False
if __name__ == '__main__':
# try and pull the router address. if none defined, require input.
try:
addr = args.address[0]
except TypeError:
addr = str(input('\nInput router IP address: '))
# try and pull the destination. if none defined, require input.
try:
dst = args.destination[0]
except TypeError:
dst = int(input('\nInput destination: '))
# try and pull the source. if none defined, send false and continue.
try:
src = args.source[0]
except TypeError:
src = int(input('\nInput source: '))
router = blackmagic_router_control(host=addr)
router.route_single(destination=dst, source=src)
# For testing connection issues
# router = blackmagic_router_control(host='0.0.0.0')
# router.route_single(destination=1, source=1)