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Uyawag / Direct3DSurfaceAccessInHoloLens2Example

Example project for question.
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nativeSurface->Map failed #1

Open aaman-git opened 9 months ago

aaman-git commented 9 months ago

Hi Uyawag,

Thanks for the sample project. Very helpful. I tried it out and unfortunately I am stuck with this error from the dll: nativeSurface->Map failed. hr: 80070057

Are you familiar what can cause this and how to resolve it? From what I understood is that you succeeded in reading the pixel data from the dll.

Best, Aman

Uyawag commented 9 months ago

@aaman-git Sorry, I forgot about the project because it was 2 years ago. That time, I trying a HoloLens2 App development, encountered a problem. The project was create for question to stack overflow. Problem was solve by answer. Probably, I fix it and applied to the Git project. But, I don't remember run it or not.

Direct3DSurfaceAccess.cpp, line 39: I commented below.

// Returns E_INVALIDARG when 2nd arg is "DXGI_MAP_READ" or "DXGI_MAP_READ | DXGI_MAP_DISCARD".
// Should research.

E_INVALIDARG is 80070057. Probably, need to change nativeSurface->Map's 2nd argment but I forgot that how.

Sorry.

MarkVabulas commented 1 month ago

I receive the same issue. I don't have issues accessing the native surface from the FrameArrived call, but after casting it to the native IDXGISurface, trying to map it so I can pull the data out refuses. Switching over to the CPU-based capture works, so somewhere deeper the data is pulled. I assume it starts as a DirectX object in memory from the webcam directly, already, and therefore it Is technically accessible?