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"""
Example that shows how to receive updates on discovered chromecasts.
"""
# pylint: disable=invalid-name
import argparse
import sys
import time
from uuid import UUID
import zeroconf
import pychromecast
from pychromecast import CastInfo
from .common import add_log_arguments, configure_logging
# Enable deprecation warnings etc.
if not sys.warnoptions:
import warnings
warnings.simplefilter("default")
parser = argparse.ArgumentParser(
description="Example on how to receive updates on discovered chromecasts."
)
parser.add_argument(
"--known-host",
help="Add known host (IP), can be used multiple times",
action="append",
)
parser.add_argument(
"--force-zeroconf",
help="Zeroconf will be used even if --known-host is present",
action="store_true",
)
add_log_arguments(parser)
parser.add_argument(
"--verbose", help="Full display of discovered devices", action="store_true"
)
args = parser.parse_args()
configure_logging(args)
def list_devices() -> None:
"""Print a list of known devices."""
print("Currently known cast devices:")
for service in browser.services.values():
print(
f" '{service.friendly_name}' ({service.model_name}) @ {service.host}:{service.port} uuid: {service.uuid}"
)
if args.verbose:
print(f" service: {service}")
class MyCastListener(pychromecast.discovery.AbstractCastListener):
"""Listener for discovering chromecasts."""
def add_cast(self, uuid: UUID, service: str) -> None:
"""Called when a new cast has beeen discovered."""
print(
f"Found cast device '{browser.services[uuid].friendly_name}' with UUID {uuid}"
)
list_devices()
def remove_cast(self, uuid: UUID, service: str, cast_info: CastInfo) -> None:
"""Called when a cast has beeen lost (MDNS info expired or host down)."""
print(f"Lost cast device '{cast_info.friendly_name}' with UUID {uuid}")
list_devices()
def update_cast(self, uuid: UUID, service: str) -> None:
"""Called when a cast has beeen updated (MDNS info renewed or changed)."""
print(
f"Updated cast device '{browser.services[uuid].friendly_name}' with UUID {uuid}"
)
list_devices()
if args.known_host and not args.force_zeroconf:
zconf = None
else:
zconf = zeroconf.Zeroconf()
browser = pychromecast.discovery.CastBrowser(MyCastListener(), zconf, args.known_host)
browser.start_discovery()
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
pass
# Shut down discovery
browser.stop_discovery()
|
