What is a wdm driver

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Contents Exit focus mode. Please rate your experience Yes No. Any additional feedback? Submit and view feedback for This product This page. View all page feedback. A set of related nodes is grouped together to form a KS filter , which represents a more-or-less independent block of stream-processing functionality.

More complex functions can be constructed in a modular way by cascading several filters together to form a filter graph. A typical audio adapter card might contain audio devices for playing a wave stream through a set of speakers, converting the audio signal from a microphone to a wave stream, and synthesizing sound from a MIDI stream. The adapter driver can wrap each of these audio devices in a KS filter that it exposes to the operating system. The operating system connects the filters to other filters to form filter graphs that process audio streams on behalf of application programs.

KS filters are connected together through their pins. A pin on an audio filter can be thought of as an audio jack. A client instantiates an input or output pin on a filter when the client needs to route a data stream into or out of that filter.

In some contexts, the terms pin and stream can be used interchangeably. The output pin of the upstream filter is connected to the input pin of the downstream filter. Skip to main content.

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