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# Copyright 2024 The HuggingFace Inc. team. All rights reserved.
#
# 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.
from functools import cache
import numpy as np
CAP_V4L2 = 200
CAP_DSHOW = 700
CAP_AVFOUNDATION = 1200
CAP_ANY = -1
CAP_PROP_FPS = 5
CAP_PROP_FRAME_WIDTH = 3
CAP_PROP_FRAME_HEIGHT = 4
COLOR_RGB2BGR = 4
COLOR_BGR2RGB = 4
ROTATE_90_COUNTERCLOCKWISE = 2
ROTATE_90_CLOCKWISE = 0
ROTATE_180 = 1
@cache
def _generate_image(width: int, height: int):
return np.random.randint(0, 256, size=(height, width, 3), dtype=np.uint8)
def cvtColor(color_image, color_conversion): # noqa: N802
if color_conversion in [COLOR_RGB2BGR, COLOR_BGR2RGB]:
return color_image[:, :, [2, 1, 0]]
else:
raise NotImplementedError(color_conversion)
def rotate(color_image, rotation):
if rotation is None:
return color_image
elif rotation == ROTATE_90_CLOCKWISE:
return np.rot90(color_image, k=1)
elif rotation == ROTATE_180:
return np.rot90(color_image, k=2)
elif rotation == ROTATE_90_COUNTERCLOCKWISE:
return np.rot90(color_image, k=3)
else:
raise NotImplementedError(rotation)
class VideoCapture:
def __init__(self, *args, **kwargs):
self._mock_dict = {
CAP_PROP_FPS: 30,
CAP_PROP_FRAME_WIDTH: 640,
CAP_PROP_FRAME_HEIGHT: 480,
}
self._is_opened = True
def isOpened(self): # noqa: N802
return self._is_opened
def set(self, propId: int, value: float) -> bool: # noqa: N803
if not self._is_opened:
raise RuntimeError("Camera is not opened")
self._mock_dict[propId] = value
return True
def get(self, propId: int) -> float: # noqa: N803
if not self._is_opened:
raise RuntimeError("Camera is not opened")
value = self._mock_dict[propId]
if value == 0:
if propId == CAP_PROP_FRAME_HEIGHT:
value = 480
elif propId == CAP_PROP_FRAME_WIDTH:
value = 640
return value
def read(self):
if not self._is_opened:
raise RuntimeError("Camera is not opened")
h = self.get(CAP_PROP_FRAME_HEIGHT)
w = self.get(CAP_PROP_FRAME_WIDTH)
ret = True
return ret, _generate_image(width=w, height=h)
def release(self):
self._is_opened = False
def __del__(self):
if self._is_opened:
self.release()
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