67 lines
1.8 KiB
Python
67 lines
1.8 KiB
Python
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from functools import cache
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import numpy as np
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CAP_PROP_FPS = 5
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CAP_PROP_FRAME_WIDTH = 3
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CAP_PROP_FRAME_HEIGHT = 4
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COLOR_RGB2BGR = 4
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COLOR_BGR2RGB = 4
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@cache
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def _generate_image(width: int, height: int):
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return np.random.randint(0, 256, size=(height, width, 3), dtype=np.uint8)
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def cvtColor(color_image, color_convertion): # noqa: N802
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if color_convertion in [COLOR_RGB2BGR, COLOR_BGR2RGB]:
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return color_image[:, :, [2, 1, 0]]
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else:
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raise NotImplementedError(color_convertion)
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class VideoCapture:
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def __init__(self, *args, **kwargs):
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self._mock_dict = {
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CAP_PROP_FPS: 30,
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CAP_PROP_FRAME_WIDTH: 640,
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CAP_PROP_FRAME_HEIGHT: 480,
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}
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self._is_opened = True
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def isOpened(self): # noqa: N802
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return self._is_opened
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def set(self, propId: int, value: float) -> bool: # noqa: N803
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if not self._is_opened:
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raise RuntimeError("Camera is not opened")
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self._mock_dict[propId] = value
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return True
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def get(self, propId: int) -> float: # noqa: N803
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if not self._is_opened:
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raise RuntimeError("Camera is not opened")
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value = self._mock_dict[propId]
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if value == 0:
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if propId == CAP_PROP_FRAME_HEIGHT:
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value = 480
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elif propId == CAP_PROP_FRAME_WIDTH:
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value = 640
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return value
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def read(self):
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if not self._is_opened:
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raise RuntimeError("Camera is not opened")
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h = self.get(CAP_PROP_FRAME_HEIGHT)
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w = self.get(CAP_PROP_FRAME_WIDTH)
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ret = True
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return ret, _generate_image(width=w, height=h)
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def release(self):
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self._is_opened = False
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def __del__(self):
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if self._is_opened:
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self.release()
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