FTP上下传工具，支持多系统，可以进行windows目录下的文件选择，和UNIX下的目录选择-FTP transfer tool up and down in support of multi-system, can file selection windows directory, and select the directory under UNIX

brief Discrete Rotational Fourier Transform (DRFT).

FFT implementation OggSquish, minus cosine transforms, minus all but radix 2 4 case. In Vorbis we only need this cut-down version. -FFT implementation OggSquish, minus cosine transforms, minus all but radix 2 4 case.