Kernel Streaming(KS) tutorial

最新推荐文章于 2024-12-06 17:45:03 发布

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本文介绍微软提供的内核流媒体服务(Kernel Streaming)，它支持内核模式下流数据的处理。此外还介绍了三种多媒体类驱动模型：端口类、流类及AVStream，并解释了这些模型如何为供应商提供流功能支持。

Kernel Streaming

[This is preliminary documentation and subject to change.]

Kernel streaming (KS) refers to the Microsoft-provided services that support kernel-mode processing of streamed data. Microsoft also provides three multimedia class driver models that expose streaming functionality to the vendor. The vendor writes a minidriver that runs under one of these three class driver models.

The three class driver models are port class, stream class, and AVStream. These class drivers are implemented as export drivers (kernel-mode DLLs) in the system files portcls.sys, stream.sys, and ks.sys.

Port class and stream class are the older class drivers, used respectively with audio and video minidrivers. (The term KS 1.0 refers to the support provided by the Port Class and Stream Class drivers.) AVStream supports both audio and video minidrivers. You can build an AVStream minidriver on Microsoft Windows XP, Microsoft Windows Server 2003, or any Windows 98 Gold Edition or later platform that has DirectX 8.0 or later installed. If building on a pre-Windows XP system, AVStream is only available if you build from the DirectX (8.0 or later) DDK.