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es-cec-input.py
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es-cec-input.py
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#!/usr/bin/env python
"""
Name: es-cec-input.py
Version: 1.5
Description: cec remote control for emulation station in retropie
Author: dillbyrne
Homepage: https://github.com/dillbyrne/es-cec-input
Licence: GPL3
It depends on python-uinput package which contains
the library and the udev rules at
/etc/udev/rules.d/40-uinput.rules
cec-utils also needs to be installed
to run the code as a non root user
sudo addgroup uinput
sudo adduser pi uinput
to start on boot, add to user crontab. crontab -e
@reboot hohup ./home/pi/RetroPie/scripts/es-cec-input.py
"""
import subprocess
import uinput
import sys
import time
def get_keymap():
"""Map ES supported keys to python-uinput keys"""
keymap = {
'left': uinput.KEY_LEFT, 'right': uinput.KEY_RIGHT,
'up': uinput.KEY_UP, 'down': uinput.KEY_DOWN,
'enter': uinput.KEY_ENTER, 'kp_enter': uinput.KEY_KPENTER,
'tab': uinput.KEY_TAB, 'insert': uinput.KEY_INSERT,
'del': uinput.KEY_DELETE, 'end': uinput.KEY_END,
'home': uinput.KEY_HOME, 'rshift': uinput.KEY_RIGHTSHIFT,
'shift': uinput.KEY_LEFTSHIFT, 'rctrl': uinput.KEY_RIGHTCTRL,
'ctrl': uinput.KEY_LEFTCTRL, 'ralt': uinput.KEY_RIGHTALT,
'alt': uinput.KEY_LEFTALT, 'space': uinput.KEY_SPACE,
'escape': uinput.KEY_ESC, 'kp_minus': uinput.KEY_KPMINUS,
'kp_plus': uinput.KEY_KPPLUS, 'f1': uinput.KEY_F1,
'f2': uinput.KEY_F2, 'f3': uinput.KEY_F3,
'f4': uinput.KEY_F4, 'f5': uinput.KEY_F5,
'f6': uinput.KEY_F6, 'f7': uinput.KEY_F7,
'f8': uinput.KEY_F8, 'f9': uinput.KEY_F9,
'f10': uinput.KEY_F10, 'f11': uinput.KEY_F11,
'f12': uinput.KEY_F12, 'num1': uinput.KEY_1,
'num2': uinput.KEY_2, 'num3': uinput.KEY_3,
'num4': uinput.KEY_4, 'num5': uinput.KEY_5,
'num6': uinput.KEY_6, 'num7': uinput.KEY_7,
'num8': uinput.KEY_8, 'num9': uinput.KEY_9,
'num0': uinput.KEY_0, 'pageup': uinput.KEY_PAGEUP,
'pagedown': uinput.KEY_PAGEDOWN, 'keypad1': uinput.KEY_KP1,
'keypad2': uinput.KEY_KP2, 'keypad3': uinput.KEY_KP3,
'keypad4': uinput.KEY_KP4, 'keypad5': uinput.KEY_KP5,
'keypad6': uinput.KEY_KP6, 'keypad7': uinput.KEY_KP7,
'keypad8': uinput.KEY_KP8, 'keypad9': uinput.KEY_KP9,
'keypad0': uinput.KEY_KP0, 'period': uinput.KEY_DOT,
'capslock': uinput.KEY_CAPSLOCK, 'numlock': uinput.KEY_NUMLOCK,
'backspace': uinput.KEY_BACKSPACE, 'pause': uinput.KEY_PAUSE,
'scrolllock': uinput.KEY_SCROLLLOCK, 'backquote': uinput.KEY_GRAVE,
'comma': uinput.KEY_COMMA, 'minus': uinput.KEY_MINUS,
'slash': uinput.KEY_SLASH, 'semicolon': uinput.KEY_SEMICOLON,
'equals': uinput.KEY_EQUAL, 'backslash': uinput.KEY_BACKSLASH,
'kp_period': uinput.KEY_KPDOT, 'kp_equals': uinput.KEY_KPEQUAL,
'a': uinput.KEY_A, 'b': uinput.KEY_B, 'c': uinput.KEY_C,
'd': uinput.KEY_D, 'e': uinput.KEY_E, 'f': uinput.KEY_F,
'g': uinput.KEY_G, 'h': uinput.KEY_H, 'i': uinput.KEY_I,
'j': uinput.KEY_J, 'k': uinput.KEY_K, 'l': uinput.KEY_L,
'm': uinput.KEY_M, 'n': uinput.KEY_N, 'o': uinput.KEY_O,
'p': uinput.KEY_P, 'q': uinput.KEY_Q, 'r': uinput.KEY_R,
's': uinput.KEY_S, 't': uinput.KEY_T, 'u': uinput.KEY_U,
'v': uinput.KEY_V, 'w': uinput.KEY_W, 'x': uinput.KEY_X,
'y': uinput.KEY_Y, 'z': uinput.KEY_Z
}
return keymap
def generate_keylist():
"""generate a list of keys we actually need
this will be stored in memory and will comprise of
a,b,x,y,start,select,l,r,left,right,up,down,l2,r2,l3,r3
keyboard corresponding values the user has chosen
in the retroarch.cfg file"""
keylist = []
key_bindings = get_key_bindings('/opt/retropie/configs/all/retroarch.cfg')
keymap = get_keymap()
errors = []
for binding in key_bindings:
try:
keylist.append(keymap[binding])
except KeyError as e:
errors.append(e)
if (len(errors) > 0):
print 'The %s keys in your retroarch.cfg are unsupported\
by this script\n' % ', '.join(map(str, errors))
print 'Supported keys are:\n'
print get_keymap().keys()
sys.exit()
return keylist
def get_key_bindings(ra_cfg):
"""read key mappings from retroarch.cfg file.
returns the corresponding keys the user mapped
in the retroarch.cfg file"""
keys = []
with open(ra_cfg, 'r') as fp:
for line in fp:
if 'input_player1_' in line and '#' not in line and\
'_analog_dpad_mode' not in line:
keys.append(line.split('=')[1][2:-2])
return keys
def register_device(keylist):
return uinput.Device(keylist)
def press_keys(line, device, keylist):
"""Emulate keyboard presses when a mapped button on the remote control
has been pressed.
To navigate ES, only a,b,start,select,up,down,left,and right are required
"""
# check for key released as pressed was displaying duplicate
# presses on the remote control used for development
if "released" in line:
# Select
if "rewind" in line or "yellow" in line:
device.emit_click(keylist[5])
# Start
elif "Fast forward" in line or "blue" in line:
device.emit_click(keylist[4])
# Left on DPAD
elif "left" in line:
device.emit_click(keylist[8])
# Right on DPAD
elif "right" in line:
device.emit_click(keylist[9])
# Up on DPAD
elif "up" in line:
device.emit_click(keylist[10])
# Down on DPAD
elif "down" in line:
device.emit_click(keylist[11])
# A Button
elif "select" in line or "red" in line:
device.emit_click(keylist[0])
# B Button
elif "exit" in line or "green" in line:
device.emit_click(keylist[1])
# Uncomment the prinnt statement below to display remote output
# print line
def main():
keylist = generate_keylist()
device = register_device(keylist)
idle = True
while True:
# only apply key presses when emulation station is running,
# not in emulators or kodi
# kodi has its own built in support already
running_processes = subprocess.check_output(['ps', '-A'])
if running_processes.find('kodi_v7.bin') == -1 and\
running_processes.find('retroarch') == -1 and\
running_processes.find('reicast') == -1 and\
running_processes.find('drastic') == -1:
if idle:
# start cec-client to track pressed buttons on remote
p = subprocess.Popen(
'cec-client', stdout=subprocess.PIPE, bufsize=1)
lines = iter(p.stdout.readline, b'')
idle = False
press_keys(lines.next(), device, keylist)
else:
# stop cec-client when not in ES
if not idle:
p.kill()
p.wait() # avoid zombies
idle = True
time.sleep(1)
if __name__ == "__main__":
main()