Extensible multimedia document player

Multimedia documents compose different types and formats of media objects, such as video, audio, animations, still images, and text, in one scenario forming one big composite media object. The continuous evolution of new types and formats of media objects leads to the appearance of new players for each type and format. Accordingly, the multimedia documents players should handle the new types and formats as soon as they appear. This implies that the multimedia player should be designed to be easily extensible to handle new media objects. The extensibility can be achieved using object-oriented design supported by the design patterns. In this paper, we present a design pattern-based design and implementation of an extensible multimedia document player. We will present the design of the main components of the player, such as the individual media objects players, the time scheduler, and the clock. We will present as well how to represent the media object states, using object-oriented approach, and the inter-states transitions.