NvMaxineSdkDotNet

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NvAfxDotNet

A C#/.NET wrapper around Nvidia's Audio Effects (NV-AFX, NvAudioEffects) C++ SDK:

• https://github.com/NVIDIA/MAXINE-AFX-SDK
• https://github.com/NVIDIA/MAXINE-AFX-SDK/tree/v1.1.0/nvafx/include
• https://github.com/NVIDIA/MAXINE-AFX-SDK/blob/v1.1.0/nvafx/include/nvAudioEffects.h

NvAfxDotNet: The actual class library project.
NvAfxDotNetTestApp: A C# demo WinForms app.
NvAfxDotNetUnitTest: Incomplete unit tests for the class library.
NvAfxTestConsole: A C++ Console app that I used as a working baseline.
cscore: Used by the NvAfxDotNetTestApp; I don't use NAudio because I don't know how to write effects/filters for it.
scratch: Where snippets go to die.

Currently only tested with NVAFX_EFFECT_DENOISER.

Requirements

1. Windows >= 10 x64
   There are "AllCPU" and "x86" versions in the Solution/Projects, but those don't work and should probably be removed.
2. You need to install the Nvidia Broadcast Audio Effects (aka: "Maxine") SDK runtime for the library and demo app to work:
   https://www.nvidia.com/en-us/geforce/broadcasting/broadcast-sdk/resources/
3. NVAudioEffects.dll needs to be in your path.
   Installing NVIDIA Audio Effects SDK adds %NVAFX_SDK_DIR% to your Environment.
   So, add %NVAFX_SDK_DIR% to your PATH.
   Example: set PATH=%PATH%;%NVAFX_SDK_DIR%
   TL;DR: I initially implemented a dynamic LoadLibrary version of this, but adding a delegate for each function made the API ugly. :/

TODO

1. Verify P/Invoke Marshalling of 7 remaining unverified SDK methods.
2. Support more than just NVAFX_EFFECT_DENOISER.
3. Expand this repo to support MAXINE-VFX-SDK and/or MAXINE-AR-SDK

Resources Used:

• https://developer.nvidia.com/blog/achieving-noise-free-audio-for-virtual-collaboration-and-content-creation-apps/
• https://www.youtube.com/watch?v=Rfdtx-Oj54g
  • https://youtu.be/Rfdtx-Oj54g?t=160
• https://docs.nvidia.com/deeplearning/maxine/audio-effects-sdk/index.html
  • https://docs.nvidia.com/deeplearning/maxine/audio-effects-sdk/index.html#use-sdk-in-apps
  • https://docs.nvidia.com/deeplearning/maxine/audio-effects-sdk/index.html#api-ref
• https://github.com/NVIDIA/MAXINE-AFX-SDK/blob/v1.1.0/samples/effects_demo/effects_demo.cpp
• OBS Studio:
  • https://github.com/obsproject/obs-studio/commit/4ac96e1352db1272f4cacc2e0eafcd7b24d527b6
  • https://github.com/obsproject/obs-studio/blob/master/plugins/obs-filters/nvafx-load.h
  • https://github.com/obsproject/obs-studio/blob/master/plugins/obs-filters/obs-filters.c
  • https://github.com/obsproject/obs-studio/blob/master/plugins/obs-filters/noise-suppress-filter.c
  • ...