Mi_Height_Log2[ BLOCK_SIZES ] =
{
    0, 1, 0, 1, 2, 1, 2, 3, 2, 3, 4,
    3, 4, 5, 4, 5, 6, 5, 6, 2, 0, 3, 1, 4, 2,
    3, 0, 4, 1
}