Título: | A GALS APPROACH FOR POGRAMMING DISTRIBUTED INTERACTIVE MULTIMEDIA APPLICATIONS | ||||||||||||
Autor: |
RODRIGO COSTA MESQUITA SANTOS |
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Colaborador(es): |
NOEMI DE LA ROCQUE RODRIGUEZ - Orientador |
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Catalogação: | 18/MAR/2019 | Língua(s): | ENGLISH - UNITED STATES |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=37372&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=37372&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.37372 | ||||||||||||
Resumo: | |||||||||||||
In this, work we investigate how to guarantee two properties in the development of interactive distributed multimedia applications: determinism and consistency. Determinism is a property of individual nodes in a distributed application and states that a program always produces the same output when fed with the same input. Consistency is a property of the whole system and states that all nodes should have the same view of the order of events. We evaluate the use of the synchronous language Céu in the context of multimedia programming for guaranteeing the determinism property. Regarding consistency, we evaluate the GALS (Globally Asynchronous Locally Synchronous) architecture for enforcing consistency. Traditionally, multimedia applications are developed using either a domain specific language or a general purpose language supported by specialized frameworks. Neither of the two approaches promotes the development of deterministic and consistent interactive distributed multimedia applications. Our investigation of the use of synchronous languages in the multimedia field led to the development of Céu-Media, a deterministic multimedia library for the synchronous language Céu, and Mars, a GALS middleware for interactive distributed multimedia applications. The results of this thesis indicate that using the guarantees of the synchronous language Céu it is possible to develop deterministic multimedia applications using Céu-Media. Furthermore, they also indicate that the consistency model enforced by the GALS middleware Mars guarantees that all nodes always agree upon the order of events in a distributed presentation. We validate our proposal by discussing the development of real-world distributed multimedia applications proposed by the research community using both, Céu-Media and Mars, highlighting the main advantages and also the drawbacks of using our approach.
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