138 lines
3.6 KiB
Python
138 lines
3.6 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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相机管理器模块
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提供相机和显示的统一管理和线程安全访问
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"""
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import threading
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import config
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from logger_manager import logger_manager
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class CameraManager:
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"""相机管理器（单例）"""
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_instance = None
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def __new__(cls):
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if cls._instance is None:
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cls._instance = super(CameraManager, cls).__new__(cls)
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cls._instance._initialized = False
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return cls._instance
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def __init__(self):
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if self._initialized:
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return
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# 私有对象
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self._camera = None
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self._display = None
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# 线程安全锁
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self._camera_lock = threading.Lock()
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self._display_lock = threading.Lock()
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# 相机配置
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self._camera_width = 640
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self._camera_height = 480
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self._initialized = True
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# ==================== 初始化方法 ====================
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@property
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def logger(self):
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"""获取 logger 对象"""
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return logger_manager.logger
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def init_camera(self, width=640, height=480):
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"""初始化相机"""
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if self._camera is not None:
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return self._camera
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from maix import camera
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self._camera_width = width
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self._camera_height = height
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with self._camera_lock:
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if self._camera is None:
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self._camera = camera.Camera(width, height)
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return self._camera
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def init_display(self):
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"""初始化显示"""
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if self._display is not None:
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return self._display
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from maix import display
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with self._display_lock:
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if self._display is None:
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self._display = display.Display()
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return self._display
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# ==================== 访问方法 ====================
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@property
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def camera(self):
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"""获取相机实例（懒加载）"""
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if self._camera is None:
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self.init_camera()
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return self._camera
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@property
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def display(self):
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"""获取显示实例（懒加载）"""
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if self._display is None:
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self.init_display()
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return self._display
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# ==================== 业务方法 ====================
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def read_frame(self):
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"""
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线程安全地读取一帧图像
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Returns:
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frame: 图像帧对象
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"""
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with self._camera_lock:
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if self._camera is None:
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self.init_camera()
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return self._camera.read()
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def show(self, image):
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"""
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线程安全地显示图像
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Args:
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image: 要显示的图像对象
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"""
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with self._display_lock:
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if self._display is None:
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self.init_display()
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self._display.show(image)
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def release(self):
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"""释放相机和显示资源（如果需要）"""
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with self._camera_lock:
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if self._camera is not None:
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# MaixPy 的 Camera 可能不需要显式释放，但可以在这里清理
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self._camera = None
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with self._display_lock:
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if self._display is not None:
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# MaixPy 的 Display 可能不需要显式释放
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self._display = None
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# 创建全局单例实例
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camera_manager = CameraManager()
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