Further stubbing of Kernel Streaming APIs

[reactos.git] / reactos / drivers / multimedia / README

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-This is a directory for the kernel streaming components, along with multimedia
-kernel-mode drivers.
-
-Much of this code exists only as stubs for future implementation.
-
-The "include" directory exists as a place to store the KS related headers. It
-should be moved to the main include tree later.
-
-Andrew Greenwood
-3rd December, 2006
-
-
-== Kernel Streaming (KS.SYS) ==
-
-Deals with streaming media. This is the core component for this, and can be
-interacted with from usermode (usually via DirectX.)
-
-XP and DirectX 8 versions of this component provide an additional suite of
-AvStream API functions.
-
-COM-style interfaces are used with this component.
-
-
-== SysAudio (SYSAUDIO.SYS) ==
-
-Filter graph builder (deals with topology.) Not sure what this does yet.
-
-
-== Port Class (PORTCLS.SYS) ==
-
-Used by WDM audio drivers, this handles many common tasks required for
-audio drivers.
-
-COM-style interfaces are used with this component.
-
-
-== WDM Audio (WDMAUD.DLL / WDMAUD.SYS) ==
-
-Effectively a relay from usermode to kernelmode, the usermode portion is a
-MME-style driver (for WINMM.DLL) which tells the kernelmode portion what to do.
-
-This typically involves interacting with KS.SYS in some way.
-
-In Vista, the kernelmode portion is no longer present and the usermode portion
-interacts with the Vista audio stack (which resides in usermode but also
-ultimately ends up going back into kernelmode in the end!)
-
-
-== Optional drivers ==
-
-- sndblst      Sound Blaster (+ Pro / 16) compatible driver
-- mpu401       MPU-401 MIDI compatible driver
-