How can i rotate nv21 image format in android

I tried the following code to rotate an image. 90 degrees by default is 180 degrees.

public static void rotateNV21(byte[] input, byte[] output, int width, int height, int rotation) {
    boolean swap = (rotation == 90 || rotation == 270);
    boolean yflip = (rotation == 90 || rotation == 180);
    boolean xflip = (rotation == 270 || rotation == 180);
    for (int x = 0; x < width; x++) {
        for (int y = 0; y < height; y++) {
            int xo = x, yo = y;
            int w = width, h = height;
            int xi = xo, yi = yo;
            if (swap) {
                xi = w * yo / h;
                yi = h * xo / w;
            }
            if (yflip) {
                yi = h - yi - 1;
            }
            if (xflip) {
                xi = w - xi - 1;
            }
            output[w * yo + xo] = input[w * yi + xi];
            int fs = w * h;
            int qs = (fs >> 2);
            xi = (xi >> 1);
            yi = (yi >> 1);
            xo = (xo >> 1);
            yo = (yo >> 1);
            w = (w >> 1);
            h = (h >> 1);
            // adjust for interleave here
            int ui = fs + (w * yi + xi) * 2;
            int uo = fs + (w * yo + xo) * 2;
            // and here
            int vi = ui + 1;
            int vo = uo + 1;
            output[uo] = input[ui]; 
            output[vo] = input[vi]; 
        }
    }
}   

      

        
        
        
      

    

I can rotate the image, but the image is compressed. Here's an example.

Any idea what's going on, I've been stuck on this for a week. Any help would be much appreciated.

Here's the code to get the image

    public Bitmap getPic(int x, int y, int width, int height) {
        System.gc();
        Bitmap b;
        Size s = mParameters.getPreviewSize();
        byte[] mmbuffer = Rotate.rotateNV21(mBuffer, s.width, s.height, 90);
        YuvImage yuvimage = new YuvImage(mmbuffer, ImageFormat.NV21, s.width, s.height, null);
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        yuvimage.compressToJpeg(new Rect(x, y, width, height), 100, outStream); // make JPG
        b = BitmapFactory.decodeByteArray(outStream.toByteArray(), 0, outStream.size()); // decode JPG
        if (b != null) {
//            Matrix matrix = new Matrix();
//            matrix.preRotate(90);
//            b = Bitmap.createBitmap(b, x, y, width, height, matrix, true);
        } else {
            //Log.i(TAG, "getPic(): Bitmap is null..");
        }
        yuvimage = null;
        outStream = null;
        System.gc();
        return b;
    }

      

        
        
        
      

    

here is the code i am trying to modify to use the camera in portait and crop the image at runtime. I need to rotate the image in order to crop the image with success and accuracy.