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Question Performance, Marshal.Copy and NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray

Discussion in 'WebGL' started by huadongchuanmei, Oct 19, 2022.

  1. huadongchuanmei

    huadongchuanmei

    Joined:
    Jan 27, 2022
    Posts:
    6
    Hi,

    Our project shows remote webrtc video in unity Texture2D. The Video image data is captured from C++ native code.
    Currently, we copy the native image data to c# byte[], I think we should have a better way to avoid marshalling costs. (Remark: After I copy the data, native c++ will delete the data buffer, I can't control it)

    I hava two questions:
    1. Is NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray with Allocator.Persistent is better than Marshal.Copy to c# byte[]?
    2. Will the garbage collector free the NativeArray aotumaically? Will it call NativeArray.dispose()? Because another main thread will read the NativeArray to Texture2D, I can't free it in the backgound thread.

    Thanks!
     
    huadongchuanmei, Oct 19, 2022
    #1

  2. De-Panther

    De-Panther

    Joined:
    Dec 27, 2009
    Posts:
    555
    Use the GetNativeTexturePtr, and WebGL texsubimage2d to draw the texture on the JS side
     
    De-Panther, Oct 20, 2022
    #2

  3. huadongchuanmei

    huadongchuanmei

    Joined:
    Jan 27, 2022
    Posts:
    6
    Sorry，Seems I post in wrong topic.Our app runs in Android、iOS、Windows...
    Thanks！
     
    huadongchuanmei, Oct 21, 2022
    #3

  4. De-Panther

    De-Panther

    Joined:
    Dec 27, 2009
    Posts:
    555
    De-Panther, Oct 21, 2022
    #4