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243 | #!/usr/bin/env python3
import functools
import contextlib
import signal
import sys
import time
from argparse import ArgumentParser
from pathlib import Path
from evdev import InputDevice, ecodes
BUTTONS = [
"KEY_OK",
"KEY_MENU",
"KEY_ESC",
"KEY_UP",
"KEY_DOWN",
"KEY_LEFT",
"KEY_RIGHT",
"KEY_RED",
"KEY_GREEN",
"KEY_YELLOW",
"KEY_BLUE",
"KEY_0",
"KEY_1",
"KEY_2",
"KEY_3",
"KEY_4",
"KEY_5",
"KEY_6",
"KEY_7",
"KEY_8",
"KEY_9",
"KEY_INFO",
"KEY_PLAY",
"KEY_PAUSE",
"KEY_STOP",
"KEY_RECORD",
"KEY_FASTFORWARD",
"KEY_REWIND",
"KEY_NEXT",
"KEY_BACK",
"KEY_POWER2",
"KEY_CHANNELUP",
"KEY_CHANNELDOWN",
"KEY_PREVIOUS",
"KEY_VOLUMEUP",
"KEY_VOLUMEDOWN",
"KEY_MUTE",
"KEY_SUBTITLE",
"KEY_EPG",
"KEY_CHANNEL",
"KEY_FAVORITES",
"KEY_MODE",
"KEY_TIME",
"KEY_PVR",
"KEY_SETUP",
"KEY_TEXT",
"KEY_PROG1",
"KEY_PROG2",
"KEY_PROG3",
"KEY_PROG4",
"KEY_AUDIO",
"KEY_VIDEO",
"KEY_IMAGES",
"KEY_FN",
"KEY_SCREEN",
]
RC_SYS_DEVICES = Path('/sys/class/rc/')
DEVPATH = Path('/dev')
debug = functools.partial(print, file=sys.stderr)
def print_keymap(keytable, protocol, keys):
print("[[protocols]]")
print(f'name = "{keytable}"')
print(f'protocol = "{protocol}"')
print('[protocols.scancodes]')
for keyname, scancode in keys.items():
print(f'{scancode:#0x} = "{keyname}"')
def read_from_device(dev):
def btn_generator():
for btn in BUTTONS:
yield btn
while True:
yield None
btn_gen = btn_generator()
keymap = {}
last_scancode = None
last_ts = float('inf')
button = next(btn_gen)
first_btn = button
with contextlib.closing(InputDevice(dev)) as dev:
debug(f"Please press a button for {button}")
for ev in dev.read_loop():
advance_button = False
if ev.type == ecodes.EV_MSC:
ts = ev.timestamp()
if (
ev.value == keymap.get(first_btn)
and last_scancode == keymap.get(first_btn)
and ts - last_ts > .5
):
# skip button because user pressed KEY_OK
# and it's not an unwanted repeat
advance_button = True
debug(f"skipped learning button {button}")
elif last_scancode == ev.value:
# repeated key
pass
elif ev.value != keymap.get(first_btn):
if ev.value < 0:
ev.value &= 0xffffffff
debug(f"Got scancode {ev.value:#06x} for {button}.")
advance_button = True
keymap[button] = ev.value
last_scancode = ev.value
last_ts = ts
last_scancode = ev.value
if advance_button:
button = next(btn_gen)
if button:
debug(f"Please press a button for {button} (press KEY_OK to skip)")
else:
break
return keymap
def list_devices():
devices = []
for rc_device in RC_SYS_DEVICES.glob('rc*'):
device = {}
device["path"] = rc_device
device["sys"] = rc_device.name
with open(next(rc_device.glob('input*/event*/uevent'))) as f:
# read DEVNAME attribute (and others)
for line in f:
key, value = line.rstrip().split('=')
device[key] = value
with open(rc_device.joinpath('uevent')) as f:
for line in f:
key, value = line.rstrip().split('=')
device[key] = value
with open(rc_device.joinpath('protocols')) as f:
protocols = f.read().rstrip().split()
active_protocols = [p[1:-1] for p in protocols if (
p.startswith('[') and p != "[lirc]")]
inactive_protocols = [p for p in protocols if not p.startswith('[')]
device["protocols"] = protocols
device["inactive_protocols"] = inactive_protocols
device["active_protocols"] = active_protocols
devices.append(device)
return devices
if __name__ == '__main__':
parser = ArgumentParser(description="create keymaps for rc-core devices")
parser.add_argument('-p', '--protocol', metavar='PROTOCOL',
help='set ir-protocol')
parser.add_argument('-d', '--device', metavar='DEVICE', default=None,
help='ir device (e.g. rc0)')
parser.add_argument('-o', '--output', metavar='KEYMAP', default=None,
help='write the keymap to this file instead of printing to stdout')
args = parser.parse_args()
devices = list_devices()
if not devices:
sys.exit("No rc-core devices found. Exiting.")
elif len(devices) == 1:
print(f"Using device {devices[0]['NAME']}", file=sys.stderr)
dev = devices[0]['path']
input_dev = devices[0]['DEVNAME']
keytable = devices[0]['NAME']
protocol = ",".join(devices[0]['active_protocols'])
else:
if args.device:
for d in devices:
if (d['sys'] == args.device
or d['path'] == RC_SYS_DEVICES.joinpath(args.device)):
dev = RC_SYS_DEVICES.joinpath(args.device)
input_dev = d['DEVNAME']
keytable = d['NAME']
protocol = ",".join(d['active_protocols'])
else:
for i, d in enumerate(devices, start=1):
if not args.protocol:
print(f"{i}) {d['DEV_NAME']} ({','.join(d.get('active_protocols'))})")
else:
print(f"{i}) {d['DEV_NAME']}")
try:
dev_num = int(input("\tUse device numer: "))
if dev_num < 0 or dev_num > len(devices):
raise ValueError
d = devices[dev_num - 1]
except (ValueError, IndexError):
sys.exit("invalid device number")
input_dev = d['DEVNAME']
keytable = d['NAME']
protocol = ",".join(d['active_protocols'])
dev = d['path']
# set ir-protocol(s)
if args.protocol:
try:
with open(dev.joinpath('protocols'), 'w') as f:
f.write(args.protocol)
except PermissionError as e:
sys.exit(f"Error: insifficient permissions to change protocol - are you root?")
except IOError as e:
sys.exit(f"Error: could not set protocol(s) to {args.protocol}: {e}")
protocol = args.protocol
input_dev = DEVPATH.joinpath(input_dev)
debug("using device: ", input_dev)
def signal_handler(signum, frame):
sys.exit()
for signame in {'SIGINT', 'SIGTERM'}:
signal.signal(
getattr(signal, signame),
signal_handler)
try:
keymap = read_from_device(input_dev)
except PermissionError as e:
sys.exit(f"Error: can't open {input_dev} - are you root?")
else:
if args.output:
with open(args.output, 'w') as output:
print_keymap(keytable, protocol, keymap, output)
else:
print_keymap(keytable, protocol, keymap, None)
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