Reading Native Surface Texture into Streaming Unity Texture [Android]?

Questions & Answers
1

I am trying to retrieve the camera preview image on Android and show it on a plane in Unity. In my native code I created the following function:

SurfaceTexture surfaceTex;

public void setUpVideoTexture(int texturePtr){
	surfaceTex = new SurfaceTexture(texturePtr);
	surfaceTex.setOnFrameAvailableListener(this);

	Camera cam = Camera.open();//Alternatively I call this function on startup
	try {
		cam.setPreviewTexture(surfaceTex);
		cam.setPreviewCallback(this);
		cam.startPreview();
		Log.d("Unity","Preview texture set up");
	} catch (IOException e) {
		e.printStackTrace();
	}
}

In Unity I call this function and pass the native texture pointer of the Unity texture:

jo.Call("setUpVideoTexture", (int)renderer.material.mainTexture.GetNativeTexturePtr());

So now the camera preview image should be written into the Unity texture on every update.

However, on updating the surface texture, I get the error message “Error binding external texture image”. I also tried using a RenderTexture but although I don’t get an error the texture stays black.
Why doesn’t this work? Is it not possible to use the streaming texture in combination with a native surface texture?

2

anyone got it working?

3

Anybody have an idea?

4

Have you considered WebcamTexture?