[wdmaudiodev] Re: SFX, MFX, EFX

  • From: "Leonard Shoell" <lshoell@xxxxxxxxxxxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Fri, 9 May 2014 14:37:18 -0600

Thanks for this info. It helps a lot. It's frustrating the Microsoft is now
requiring it, but has provided any documentation.

 

Do you know if it is possible to use the same APO and INF for Win 8.1 and
prior versions of Windows? I'm hoping I can take existing LFXs/GFXs and do
the following:

 

1.       Add support for the new interfaces in the APOs

2.       Register both the LFX/GFX and SFX/MFX in the INF

 

Or, do we have to have separate APOs and INFs for Win 8.1?

 

Leonard

 

From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Matthew van Eerde
Sent: Friday, May 9, 2014 11:46 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: SFX, MFX, EFX

 

There is no whitepaper or anything, but you can look at the "Microsoft slate
system virtual audio device driver sample"
http://code.msdn.microsoft.com/windowshardware/slate-system-virtual-audio-f2
41062f as a sample.

 

New .inf directives:

PKEY_FX_StreamEffectClsid

PKEY_FX_ModeEffectClsid

PKEY_FX_EndpointEffectClsid

PKEY_SFX_ProcessingModes_Supported_For_Streaming

PKEY_MFX_ProcessingModes_Supported_For_Streaming

PKEY_EFX_ProcessingModes_Supported_For_Streaming

 

New APO interfaces:

IAudioProcessingObject::Initialize now takes an APOInitSystemEffects2

IAudioSystemEffects2::GetEffectsList

 

New KS properties:

KSPROPSETID_AudioSignalProcessing / KSPROPERTY_AUDIOSIGNALPROCESSING_MODES

This calls into a new portcls miniport interface:
IMiniportAudioSignalProcessing::GetModes

 

KSPROPSETID_AudioEffectsDiscovery /
KSPROPERTY_AUDIOEFFECTSDISCOVERY_EFFECTSLIST

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