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frontend.py
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frontend.py
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import logging
import pykka
from mopidy import core
logger = logging.getLogger(__name__)
class RaspberryGPIOFrontend(pykka.ThreadingActor, core.CoreListener):
def __init__(self, config, core):
super().__init__()
import RPi.GPIO as GPIO
self.core = core
self.config = config["raspberry-gpio"]
self.pin_settings = {}
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
# Iterate through any bcmN pins in the config
# and set them up as inputs with edge detection
for key in self.config:
if key.startswith("bcm"):
pin = int(key.replace("bcm", ""))
settings = self.config[key]
if settings is None:
continue
pull = GPIO.PUD_UP
edge = GPIO.FALLING
if settings.active == "active_high":
pull = GPIO.PUD_DOWN
edge = GPIO.RISING
GPIO.setup(pin, GPIO.IN, pull_up_down=pull)
GPIO.add_event_detect(
pin,
edge,
callback=self.gpio_event,
bouncetime=settings.bouncetime,
)
self.pin_settings[pin] = settings
def gpio_event(self, pin):
settings = self.pin_settings[pin]
self.dispatch_input(settings.event)
def dispatch_input(self, event):
handler_name = f"handle_{event}"
try:
getattr(self, handler_name)()
except AttributeError:
raise RuntimeError(
f"Could not find input handler for event: {event}"
)
def handle_play_pause(self):
if self.core.playback.get_state().get() == core.PlaybackState.PLAYING:
self.core.playback.pause()
else:
self.core.playback.play()
def handle_next(self):
self.core.playback.next()
def handle_prev(self):
self.core.playback.previous()
def handle_volume_up(self):
volume = self.core.mixer.get_volume().get()
volume += 1
volume = min(volume, 100)
self.core.mixer.set_volume(volume)
def handle_volume_down(self):
volume = self.core.mixer.get_volume().get()
volume -= 1
volume = max(volume, 0)
self.core.mixer.set_volume(volume)