Design And Implementation On An Embedded Media Base

With the development of computer network,storage and embedded technology, the amount of user's multimedia files grows quickly, how to manage the multimedia resources effectively becomes a problem that would be solved urgently. Therefore author has designed this media base management system which is based on embedded system.The system includes four main modules: user interface,database management,file management and inquiry&monitor. User interface uses SDI frame and CSplitterWnd to divide window dynamically, uses model-view-controler(MVC) pattern to demonstrate various multimedia resources'informations distinctly for users. Database management uses the characteristics of embedded application program to design the media property database after the compromise of time and space; and uses CCeDBOpt to encapsule the operations for database in order to present conveniently to the upper level module for using. File management uses the pattern of Factory Method for creation and abstract design of various media files so that various media resources are well inherited and derived, accomplishing expansibility and loosen coupling. This module has designed CCeFileOpt for operating and visiting various media resource informations, and multimedia file's storage and visiting will be handled by the file system of Windows CE. Therefore it expands storage capacity and raises the visit efficience. Inquiry&monitor module uses rank and property information table to search values of database's fields, uses the changing news of file system to monitor some media directories so that synchronization of file system and automatic updating media base is accomplished.First, this paper classifies and describes the multimedia resoure's property fully, then finishes the design of the database of multimedia resource. The inquiry and management of multimedia resource are the important functions of the system. The author explains the inquiry&monitor module and management of the media resources fully and respectively. Finally, summarizes the work and makes expectation for the succeeding work.