#
# Copyright 2016 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import cv2
import logging
import glob
import itertools
class ImageSource(object):
def NextFrame(self):
raise NotImplemented
class CameraSource(ImageSource):
def __init__(self):
logging.info("Opening video capture")
self.cap = cv2.VideoCapture(0)
def NextFrame(self):
_, frame = self.cap.read()
return frame
class FileSource(ImageSource):
def __init__(self, filenames):
self.frames = [cv2.imread(f) for f in glob.glob(filenames)]
assert self.frames, "No image files specifed"
self.it = itertools.cycle(self.frames)
def NextFrame(self):
return self.it.next().copy()
