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    • 8. 发明申请
    • DRIVING SYSTEM FOR VIRTUAL WEB CAMERA
    • 虚拟网络摄像机驱动系统
    • US20120257066A1
    • 2012-10-11
    • US13079814
    • 2011-04-05
    • Chih-Ming Chen
    • Chih-Ming Chen
    • H04N5/225
    • H04N5/232
    • A driving system for virtual web camera enabling several applications to access corresponding virtual web cameras is disclosed. The driving system includes the operations of: linking an upper filter to top of USB Video Class Driver as a driver for the virtual web camera through an upper filter driver mechanism provided by an operating system; executing the upper filter to perform initialization and generate device objects, each corresponding to a real web camera as the virtual web camera and having a specific device name; a file handle for the device object being assigned to the application, which opens the device object and then communicates with the web camera without changing the source code; and releasing the file handle when the file handle is closed at the request of the application such that another application can open and use the device object without interfering with other current applications.
    • 公开了一种用于允许多个应用访问相应的虚拟网络摄像机的虚拟网络摄像机的驱动系统。 驱动系统包括以下操作:通过由操作系统提供的上部过滤器驱动器机构将上部过滤器连接到USB视频类驱动器顶部作为虚拟网络摄像机的驱动程序; 执行上级滤波器以执行初始化并生成每个对应于作为虚拟网络摄像机的真实网络摄像机并具有特定设备名称的设备对象; 分配给应用的设备对象的文件句柄,其打开设备对象然后与网络摄像机通信而不改变源代码; 并且当应用程序的请求关闭文件句柄时释放文件句柄,使得另一个应用程序可以打开并使用设备对象而不干扰其他当前应用程序。