MP3的编解码，由输入端获得PCM流后进行mp3编码，及到接收端解码过程-MP3 codec from the input PCM stream received after the mp3 encoding and decoding process to the receiving end

提取lame库的编码库和解码库，可以简单实现将pcm格式转化为MP3格式文件输出-Extraction lame library encoding and decoding library library, you can simply achieve the pcm format into MP3 format file output

pcm音频数据编码成mp3文件，编码程序写成了接口，方便调用，参考tests目录下的使用demo(PCM audio data is encoded into a MP3 file, the code program is written as an interface, convenient to call, and refer to the use of demo under the tests directory)