带优先级状态机管理的轻量级无线音乐路由器

摘要

In order to solve the problem that the performance of wireless music router is unstable,we studied and designed a mips architecture-based lightweight wireless music router.Based on DLNA standard,we used the Platinum framework to design and implement the lightweight module for interactive discovery of DLNA control point and device,and designed a state machine management mechanism with priority to manage the order sequence of interactive control module so as to avoid the problem of unordered control signals caused by frequent music controls.We designed a high fidelity and lossless audio player,it realises the automatic download of audio files to local by DLNA devices.Moreover we used the ALSA-based advanced Linux sound architecture to achieve high fidelity music decoding and thus ensured the high quality music output to audio equipment.We used the software Chariot and Iperf in real tests of music router and mobile phone,test results of throughput and user datagram protocol showed that the wireless transmission performance of control signal was efficient and stable, test result of sound quality also showed that it was able to obtain high quality audio signal.%为了解决目前无线音乐路由器性能不稳定问题，研究开发一个基于mips架构的轻量级无线音乐路由器。基于DLNA标准，采用Platinum架构设计并实现了轻量级DLNA控制点与设备交互发现模块。设计了一个有优先级的状态机管理机制来管理交互控制模块的命令序列，来避免频繁音乐控制导致控制信号混乱的问题。设计了一个高保真无损音频播放器，实现设备自动下载音频文件序列表到本地，并采用基于ALSA的高级Linux声音架构来实现音乐的高保真解码，确保高品质的音乐输出至音响设备。采用Chariot和Iperf软件进行对音乐路由器与手机端的真实测试，吞吐量和用户数据报协议的测试结果表明控制信号的无线传输性能高效稳定，音质测试结果表明能够得到高质量的音频信号。