mp4的源码,主要包括loader,usb driver,mp3 decoder,jpeg decoder,mpeg decoder部分.引导部分是基于arm9的s3c2410,部分代码未经过完善.-mp4 the source, including loader, usb driver, mp3 decoder, jpeg decoder, mpeg decoder part. guide ARM9 based in part on the s3c2410, part of the code