Ginga-NCL architecture for plug-ins

  • Authors:

  • Marcio Ferreira Moreno;Rafael Savignon Marinho;Luiz Fernando Gomes Soares

  • Affiliations:

  • PUC-Rio, Rio de Janeiro, Brazil;PUC-Rio, Rio de Janeiro, Brazil;PUC-Rio, Rio de Janeiro, Brazil

  • Venue:
  • Proceedings of the 1st Workshop on Developing Tools as Plug-ins
  • Year:
  • 2011

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Abstract

Ginga-NCL is the declarative environment of the Ginga middleware, an ITU-T Recommendation for IPTV services and ITU-R Recommendation for terrestrial digital TV. This paper discusses the two-way solution Ginga proposes for its plug-ins. Ginga defines an API that allows third party tools as NCL (the declarative language of Ginga) player's plug-ins for specific media-object type exhibition that composes a DTV application presentation in its whole. As NCL allows nested NCL applications, an NCL application itself acts as a plug-in of another parent NCL application, therefore obeying the same plug-in API previously mentioned. In general, the same NCL plug-in API can be used to allow applications specified in other languages to be embedded in NCL applications, as well as to allow NCL applications to be embedded in other presentation environments, in particular the Ginga-NCL environment. This two-way bridge is exemplified in this paper between NCL and HTML applications.