基于ARM-Linux多媒体播放器的设计与实现

摘要

针对目前大多数多媒体播放系统都需要通过专门的视频编解码芯片对视频文件进行编解码,所带来的成本高、开发繁琐等问题,结合ARM微处理器、嵌入式Linux操作系统、MPlayer应用程序等,设计一种基于ARM-Linux的嵌入式多媒体播放系统.该系统采用了低成本、低功耗、高性能的ARM处理器,嵌入了开源、移植性高,功能强大的Linux操作系统.同时使用了网络文件系统NFS,实现不同操作平台上的文件共享.最终在该嵌入式系统下,通过经移植的应用程序MPlayer将音视频文件直接经软解码后实现了多媒体播放器的功能,播放音画质流畅稳定,达到预期效果.结果表明,该设计不仅降低了成本,且简化了开发的过程.%As the most present multimedia player systems need the special codec chip to encode and decode video files, which leads to the high cost and cockamamie fussy development,an embedded multimedia player system based on ARM-Linux was designed in combination with ARM microprocessors,embedded Linux operating system,MPlayer application program,etc. The low cost,low power consumption and high performance ARM microprocessor are adopted in system,in which open source, high portability and powerful Linux operating system is embedded,and the network file system(NFS)is employed for sharing of files on different operating platforms. The function of the multimedia player was achieved after software direct decoding of audio and video files by means of the transplanted application program MPlayer. The expected effect of smooth and stable audio and video playback was realized. The result indicates that the design reduces costs and simplifies the development process.