43 lines
926 B
Python
43 lines
926 B
Python
import cv2
|
|
import os
|
|
from os.path import join
|
|
import time
|
|
from . import config
|
|
|
|
# Delay between to captures
|
|
DELAY = 0.5
|
|
|
|
|
|
def capture(output_path: str) -> bool:
|
|
try:
|
|
with open('.device', 'r') as f:
|
|
device_id = int(f.read().rstrip())
|
|
except:
|
|
device_id = 0
|
|
|
|
cam = cv2.VideoCapture(device_id)
|
|
s, img = cam.read()
|
|
if s:
|
|
cv2.imwrite(output_path, img)
|
|
cam.release()
|
|
return s
|
|
|
|
|
|
def scan(output_dir: str):
|
|
os.makedirs(output_dir, exist_ok=True)
|
|
for led in config.LEDS_UUIDS:
|
|
print(f'Turn on {led}')
|
|
img = join(output_dir, led + '.jpg')
|
|
|
|
# Measure the time it takes to capture
|
|
start = time.time()
|
|
capture(img)
|
|
delta = time.time() - start
|
|
|
|
# Wait for at least one second between each capture
|
|
if delta < DELAY:
|
|
time.sleep(DELAY - delta)
|
|
|
|
print(f'Turn off {led}')
|
|
yield led
|