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PKEY_SFX_Offload_ProcessingModes_Supported_For_Streaming

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In Windows 10, version 1511 and later, the PKEY_SFX_Offload_ProcessingModes_Supported_For_Streaming property key identifies the offload streaming processing modes supported by the driver. The driver developer should list the processing modes supported for offloaded streaming that their driver supports for the offload pin.

This list only includes signal processing modes where the APO actually processes the audio signal during offloaded streaming. This list must not include any signal processing modes supported by the APO for discovery purposes only.

The INF file property key instructs the audio endpoint builder to set the CLSIDs for offload APOs into the effects property store. This information is used to build the audio graph that will be used to inform upper level apps what effects are in place.

INF File Sample

An INF file specifies settings for an audio processing mode effect in the add-registry section for that device. The following INF example shows the strings and add-registry sections that loads the streaming processing modes supported for the offload pin into the registry.

[Strings]
PKEY_SFX_Offload_ProcessingModes_Supported_For_Streaming = "{D3993A3F-99C2-4402-B5EC-A92A0367664B},11"
...
AUDIO_SIGNALPROCESSINGMODE_DEFAULT = "{C18E2F7E-933D-4965-B7D1-1EEF228D2AF3}"
AUDIO_SIGNALPROCESSINGMODE_MOVIE   = "{B26FEB0D-EC94-477C-9494-D1AB8E753F6E}"
AUDIO_SIGNALPROCESSINGMODE_MEDIA   = "{4780004E-7133-41D8-8C74-660DADD2C0EE}"
...
[SWAPAPO.I.Association0.AddReg]
;To register an APO for offload streaming in multiple modes, use a REG_MULTI_SZ property and include all the desired modes:
HKR,"FX\\0",%PKEY_SFX_Offload_ProcessingModes_Supported_For_Streaming%,%REG_MULTI_SZ%,%AUDIO_SIGNALPROCESSINGMODE_DEFAULT%,%AUDIO_SIGNALPROCESSINGMODE_MOVIE%,%AUDIO_SIGNALPROCESSINGMODE_MEDIA%

Media-Class INF Extensions