public void CalculateIwtSizes(VideoFormat format)
{
int[] size = new int[]{0,0};
format.GetPictureLumaSize(ref size);
iwtLumaSize = new Dimension(Util.RoundUpPow2(size[0], transformDepth),
Util.RoundUpPow2(size[1], transformDepth));
format.GetPictureChromaSize(ref size);
iwtChromaSize = new Dimension(Util.RoundUpPow2(size[0], transformDepth),
Util.RoundUpPow2(size[1], transformDepth));
}