基于视频流的嵌入式GUI系统设计与实现  

Design and Implementation of Embedded GUI System Based on Video Stream

作　　者：陈利锋[1] 姚秀文 

机构地区：[1]复旦大学计算机科学技术学院,上海200433 [2]东海舰队训练基地,上海200940

出　　处：《计算机工程》2014年第12期267-271,共5页Computer Engineering

基　　金："核高基"重大专项"视频芯片测试平台的DSP程序开发"(KCH230110)

摘　　要：为在Da Vinci嵌入系统中显示图形用户界面(GUI),提出一种基于Da Vinci视频流的GUI系统设计方案。通过修改Da Vinci Vpif接口Linux核心驱动,使其能够支持用户层和驱动层的多缓冲区共享队列。在Vpif的Linux核心驱动中加入增强型直接内存存取功能,实现缓冲区的自动调度。在用户层通过多层GUI系统,设计不依赖于Framebuffer、分层封装的嵌入式GUI界面,使得系统不仅能够支持视频流的处理,而且能在视频流上实现GUI系统与视频处理系统的切换。分析结果表明,该系统能提供用户图形化参数配置的界面,具有资源消耗少、效率高等特点。This paper designs a Graphic User Interface （ GUI ） system based on DaVinci video stream to achieve displaying GUI in the DaVinci embedded system. It modifies DaVinci-Vpif’ s Linux kernel driver,so that it can support multi-buffer-queue shared between user layer and kernel layer. Add Enhanced Direct Memory Access（ EDMA） supports to Vpif’ s Linux kernel driver which enables buffer scheduling automatically. On this basis,this paper brings out a well-designed multi-GUI system that works at the user layer, which gets an embedded GUI interface but need not rely on Framebuffer. The system not only supports the processing of the video stream,but also supports smooth switching between video stream based GUI system and video processing system. Results of this study can be used in a DaVinci-based video processing system to provide a graphical user interface for configuring parameters. The GUI system works well with less resource consumption and high efficiency.

关 键 词：TI达芬奇技术 视频流 嵌入式图形用户界面 帧缓冲 Vpif接口 共享内存 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]