def _decompose_bytes_to_bit_arr(arr):
    """
    Unpack bytes to bits

    :param arr: list
        Byte Stream, as a list of uint8 values

    Returns
    -------
    bit_arr: list
        Decomposed bit stream as a list of 0/1s of length (len(arr) * 8)
    """
    bit_arr = []
    for idx in range(len(arr)):
        for i in reversed(range(8)):
            bit_arr.append(arr[idx] >> i & 1 << 0)
    return bit_arr
