import time

import cv2

from AcrossPlatform.get_platform import *


def camera_is_available(source=0):
    # 根据平台导入对应的包
    if SYS_PLATFORM == WINDOWS:
        cap = cv2.VideoCapture(source, cv2.CAP_DSHOW)
    elif SYS_PLATFORM == LINUX:
        cap = cv2.VideoCapture(source, cv2.CAP_V4L2)
    else:
        cap = None
    if cap is not None and cap.isOpened():
        time.sleep(0.1)
        ret, frame = cap.read()
        if ret:
            cap.release()
            return True
    return False


if __name__ == "__main__":
    print(camera_is_available())