import cv2
import numpy as np
import time

class VideoCamera(object):
    def __init__(self):
        # Using OpenCV to capture from device 0. If you have trouble capturing
        # from a webcam, comment the line below out and use a video file
        # instead.
        self.status = "Sharing ?"
        self._image = np.zeros((100,200))
        self.video = cv2.VideoCapture(0)

        #success, self._image = self.video.read()
        # If you decide to use video.mp4, you must have this file in the folder
        # as the main.py.
        # self.video = cv2.VideoCapture('video.mp4')

    def __del__(self):
        self.video.release()

    def get_frame(self):
        success, image = self.video.read()
        # We are using Motion JPEG, but OpenCV defaults to capture raw images,
        # so we must encode it into JPEG in order to correctly display the
        # video stream.
        ret, jpeg = cv2.imencode('.jpg', image)
        self.string = jpeg.tostring()
        self._image = image
        return jpeg.tostring()

    def GetBw(self):
        image = self._image
        # We are using Motion JPEG, but OpenCV defaults to capture raw images,
        # so we must encode it into JPEG in order to correctly display the
        # video stream.
        ret, jpeg = cv2.imencode('.jpg', image)
        self.string = jpeg.tostring()
        return jpeg.tostring()