CEC HDMI Control

cec.py

import cec
import logging

import uinput
import time

logging.basicConfig(level=logging.DEBUG)


u = uinput

KEYMAP = {
    0: u.KEY_ENTER,
    1: u.KEY_UP,
    2: u.KEY_DOWN,
    3: u.KEY_LEFT,
    4: u.KEY_RIGHT,
    5: u.KEY_TAB,
    6: u.KEY_F5,
    7: u.KEY_F11,
    200: u.KEY_LEFTCTRL,
    201: u.KEY_LEFTSHIFT,
}

cec.init('RPI')
device = uinput.Device(KEYMAP.values())


def on_key(event, key, state):
    if event is 2:
        if state > 0:
            logging.debug("Got key '{}', State '{}'".format(key, state))

            if key == 1:  # Up
                device.emit_click(u.KEY_F5)
            elif key == 2:  # Down
                device.emit_click(u.KEY_F11)
            elif key == 3:  # Left
                device.emit_combo((u.KEY_LEFTCTRL, u.KEY_LEFTSHIFT, u.KEY_TAB))
            elif key == 4:  # Right
                device.emit_combo((u.KEY_LEFTCTRL, u.KEY_TAB))
            else:
                logging.error("Unknown key {} found, sending through...".format(key))
                device.emit_click(key)


cec.add_callback(on_key, cec.EVENT_ALL)

logging.info("CEC Ready")

while True:
    time.sleep(9e9)

cec.service

[Unit]
Description=HDMI CEC Hack Utility
After=display-manager.service

[Service]
SyslogIdentifier=cec-hack
ExecStart=/usr/bin/python /usr/local/src/cec/main.py
Restart=on-failure
StandardOutput=inherit
StandardError=inherit
Restart=always
User=root
Nice=-5

[Install]
WantedBy=default.target
Alias=cec.service