Sample Code
Windows Driver Samples/ AVStream simulated hardware sample driver (Avshws)/ C++/ filter.h/
/************************************************************************** AVStream Simulated Hardware Sample Copyright (c) 2001, Microsoft Corporation. File: filter.h Abstract: This file contains the filter level header for the capture filter. History: created 3/12/2001 **************************************************************************/ class CCaptureFilter { private: // // The AVStream filter object associated with this CCaptureFilter. // PKSFILTER m_Filter; // // Cleanup(): // // This is the bag cleanup callback for the CCaptureFilter. Not providing // one would cause ExFreePool to be used. This is not good for C++ // constructed objects. We simply delete the object here. // static void Cleanup ( IN CCaptureFilter *CapFilter ) { delete CapFilter; } public: // // CCaptureFilter(): // // The capture filter object constructor. Since the new operator will // have zeroed the memory, do not bother initializing any NULL or 0 // fields. Only initialize non-NULL, non-0 fields. // CCaptureFilter ( IN PKSFILTER Filter ) : m_Filter (Filter) { } // // ~CCaptureFilter(): // // The capture filter destructor. // ~CCaptureFilter ( ) { } // // DispatchCreate(): // // This is the filter creation dispatch for the capture filter. It // creates the CCaptureFilter object, associates it with the AVStream // object, and bags it for easy cleanup later. // static NTSTATUS DispatchCreate ( IN PKSFILTER Filter, IN PIRP Irp ); };
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