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from fractions import Fraction
from typing import Callable, Tuple
from PIL import Image, ImageEnhance
from streamdeck_ui.display.filter import Filter
class PulseFilter(Filter):
def __init__(self):
super(PulseFilter, self).__init__()
self.last_time: Fraction = Fraction()
self.pulse_delay = 0.5
self.brightness = 1
self.dim_brightness = 0.5
self.filter_hash = hash(self.__class__)
def initialize(self, size: Tuple[int, int]):
pass
def transform(self, get_input: Callable[[], Image.Image], get_output: Callable[[int], Image.Image], input_changed: bool, time: Fraction) -> Tuple[Image.Image, int]:
brightness_changed = False
if time - self.last_time > self.pulse_delay:
brightness_changed = True
self.last_time = time
if self.brightness == self.dim_brightness:
self.brightness = 1
else:
self.brightness = self.dim_brightness
frame_hash = hash((self.filter_hash, self.brightness))
if input_changed or brightness_changed:
image = get_output(frame_hash)
if image:
return (image, frame_hash)
input = get_input()
enhancer = ImageEnhance.Brightness(input)
input = enhancer.enhance(self.brightness)
return (input, frame_hash)
return (None, frame_hash)
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