Initialize the Adapter. */

To support simple underrun validation.

Creates an audio interface (in disabled mode). */

This is the structure of the portclass FDO device extension Nt has created for us. We keep the adapter common object here.

----------------------------------------------------------------------------- IMiniportStreamAudioEngineNode::GetLfxState Description: Portcls call

----------------------------------------------------------------------------- IMiniportStreamAudioEngineNode::GetStreamAttributeSteppings Decscriptio

----------------------------------------------------------------------------- IMiniportStreamAudioEngineNode::GetStreamChannelCount Decscription: W

----------------------------------------------------------------------------- IMiniportStreamAudioEngineNode::GetStreamChannelVolume Decscription:

----------------------------------------------------------------------------- IMiniportStreamAudioEngineNode::GetStreamLinearBufferPosition Decscript

----------------------------------------------------------------------------- IMiniportStreamAudioEngineNode::GetStreamPresentationPosition Decscript