New for Audio Drivers

The Windows Driver Kit (WDK) that is released with Windows 7 includes the following new features for audio drivers:

IPortWMIRegistration

The IPortWMIRegistration interface allows the miniport driver to coordinate Event Tracing for Windows (ETW) registration between the port class driver (PortCls) and the miniport driver.

IPinName

The IPinName interface is used by miniport drivers to report and update the names of audio endpoints.

KSPROPERTY_JACK_DESCRIPTION2

The KSPROPERTY_JACK_DESCRIPTION2 property request is used to get the state and the jack-related capabilities of an audio device.

PKEY_AudioDevice_EnableEndpointByDefault

The PKEY_AudioDevice_EnableEndpointByDefault registry key allows you to override the default behavior of the audio endpoint builder so that your endpoint is enabled or disabled by default.

PKEY_AudioDevice_NeverSetAsDefaultEndpoint

The PKEY_AudioDevice_NeverSetAsDefaultEndpoint registry key allows you to prevent an audio endpoint from ever being selected as the default endpoint.

PKEY_AudioEngine_OEMPeriod

The PKEY_AudioEngine_OEMPeriod registry key allows you to customize the periodicity for your audio device driver. This is a per endpoint setting.

Subformat GUIDs for Compressed Audio Formats

New subformat GUIDs have been added to the Ksmedia.h header file to provide support for compressed audio formats.

 

 

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