在arm系统中，经常用到的小型MP3算法，该算法速度相当快，代码效率很高，而且提供了定点版本，对应用于arm系统是不二的选择-In the arm system, a small MP3 algorithm is often used, the speed of the algorithm is quite fast, code with high efficiency, but also provides a fixed-point version, the application in th