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