chromecast-toggle.py

#!/usr/bin/env python3
"""
A service to toggle play/pause of a Chromecast via Play multimedia key.
Requires running as root because of the "keyboard" module.

requirements: pychromecast keyboard
"""

chromecast_name = "Salon"


import os, pwd, grp
import pychromecast

def drop_privileges(uid_name='nobody', gid_name='nogroup'):
    if os.getuid() != 0:
        return

    running_uid = pwd.getpwnam(uid_name).pw_uid
    running_gid = grp.getgrnam(gid_name).gr_gid

    os.setgroups([])

    os.setgid(running_gid)
    os.setuid(running_uid)

    old_umask = os.umask(0o77)

def toggle():
    chromecasts, browser = pychromecast.get_listed_chromecasts(friendly_names=[chromecast_name])
    cast = chromecasts[0]
    cast.wait()
    cast.media_controller.block_until_active()

    if cast.media_controller.is_playing:
        cast.media_controller.pause()
    elif cast.media_controller.is_paused:
        cast.media_controller.play()

    browser.stop_discovery()

import keyboard
keyboard.add_hotkey(164, toggle)
drop_privileges()
keyboard.wait()