filter driver


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filter driver

A Windows driver that adds value to peripheral devices or supports a specialized device in the PC. Either written by Microsoft or the vendor of the hardware, any number of filter drivers can be added to Windows. Upper level filter drivers sit above the primary driver for the device (the function driver), while lower level filter drivers sit below the function driver and above the bus driver.

Filters may work on a certain brand of device such as a mouse or keyboard, or they may perform some operation on a class of devices, such as any mouse or any keyboard. Another type of filter driver is the bus filter driver, which may be added on top of the bus driver. For example, an ACPI bus filter is added to support power management for each device (see ACPI). See driver.
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This article will examine how integrated video filter drivers enable portable electronic games to achieve high-definition quality video performance, integrate the capability of driving larger displays, and yet maintain their popular, compact size.
A special filter driver layers between file system drivers and volume drivers, allowing the software to create and backup consistent views of all files, including open files.
The MO outputs share a low-impedance SAW filter driver stage.
APS acts as a filter driver that provides a level of indirection between the OS and the I/O paths.
Digging into the architecture a bit, I discovered that FlexApp leverages a Filter Driver architecture.
Read requests from the backup package are passed to the OTM filter driver that determines if the data is already in cache.