中文说明：是一个function函数，里面涉及快速傅里叶变化，可以给使用者直接提供调用函数的机会，不用使用者重新改写，只要将里面的对应参数写上就可以了。
English Description：
Is a function function, which involves fast Fu Liye change, you can give users the opportunity to directly provide the function of the call, without the user to rewrite, as long as the corresponding parameters will be written on it.