CODEWITHSUNDEEP
androidrenderscript
user6018651
user6018651

Reputation:

android - YUV NV12 to RGB conversion with RenderScript

Android has buildin convert function for YUV to RGB, below code works fine for NV21 YUV input but if use NV12 input, it will crash.

public Bitmap YUV_toRGB(byte[] yuvByteArray,int W,int H) {
    RenderScript rs = RenderScript.create(this);
    ScriptIntrinsicYuvToRGB yuvToRgbIntrinsic = ScriptIntrinsicYuvToRGB.create(rs, Element.U8_4(rs));

    Type.Builder yuvType = new Type.Builder(rs, Element.U8(rs)).setX(yuvByteArray.length);
    Allocation in = Allocation.createTyped(rs, yuvType.create(), Allocation.USAGE_SCRIPT);

    Type.Builder rgbaType = new Type.Builder(rs, Element.RGBA_8888(rs)).setX(W).setY(H);
    Allocation out = Allocation.createTyped(rs, rgbaType.create(), Allocation.USAGE_SCRIPT);

    in.copyFrom(yuvByteArray);

    yuvToRgbIntrinsic.setInput(in);
    yuvToRgbIntrinsic.forEach(out);
    Bitmap bmp = Bitmap.createBitmap(W, H, Bitmap.Config.ARGB_8888);
    out.copyTo(bmp);

    yuvToRgbIntrinsic.destroy();
    rs.destroy();
    return bmp;
}

How can I change the code to convert NV12 to RGB? No document say what's the input format supported and how to config it.

Upvotes: 1

Views: 2055

Answers (1)

Larry Schiefer
Larry Schiefer

Reputation: 15775

The Android documentation on ScriptIntrinsicYuvToRGB clearly states:

The input allocation is supplied in NV21 format as a U8 element type. The output is RGBA, the alpha channel will be set to 255.

If you need a different YUV format, you'll have to write your own RS kernel to do the conversion.

Upvotes: 1

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