Sample Code
Windows Driver Samples/ AVStream filter-centric simulated capture sample driver (Avssamp)/ C++/ avssamp.cpp/
/************************************************************************** AVStream Filter-Centric Sample Copyright (c) 1999 - 2001, Microsoft Corporation File: avssamp.cpp Abstract: This is the main file for the filter-centric sample. History: created 6/18/01 **************************************************************************/ #include "avssamp.h" /************************************************************************** INITIALIZATION CODE **************************************************************************/ extern "C" DRIVER_INITIALIZE DriverEntry; extern "C" NTSTATUS DriverEntry ( IN PDRIVER_OBJECT DriverObject, IN PUNICODE_STRING RegistryPath ) /*++ Routine Description: Driver entry point. Pass off control to the AVStream initialization function (KsInitializeDriver) and return the status code from it. Arguments: DriverObject - The WDM driver object for our driver RegistryPath - The registry path for our registry info Return Value: As from KsInitializeDriver --*/ { // // Simply pass the device descriptor and parameters off to AVStream // to initialize us. This will cause filter factories to be set up // at add & start. Everything is done based on the descriptors passed // here. // return KsInitializeDriver ( DriverObject, RegistryPath, &CaptureDeviceDescriptor ); } /************************************************************************** DESCRIPTOR AND DISPATCH LAYOUT **************************************************************************/ // // FilterDescriptors: // // The table of filter descriptors that this device supports. Each one of // these will be used as a template to create a filter-factory on the device. // DEFINE_KSFILTER_DESCRIPTOR_TABLE (FilterDescriptors) { &CaptureFilterDescriptor }; // // CaptureDeviceDescriptor: // // This is the device descriptor for the capture device. It points to the // dispatch table and contains a list of filter descriptors that describe // filter-types that this device supports. Note that the filter-descriptors // can be created dynamically and the factories created via // KsCreateFilterFactory as well. // const KSDEVICE_DESCRIPTOR CaptureDeviceDescriptor = { // // Since this is a software sample (filter-centric filters usually are // software kinds of transforms), we really don't care about device level // notifications and work. The default behavior done on behalf of us // by AVStream will be quite sufficient. // NULL, SIZEOF_ARRAY (FilterDescriptors), FilterDescriptors, KSDEVICE_DESCRIPTOR_VERSION };
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