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14.8. Plug-Ins

A plug-in in the context of the reference software is a software component that is part of the application, but is developed, compiled, and linked independently, usually as a DLL, and communicates with the principal part of the application via binary-level APIs. Three types of plug-ins are used in the MPEG-4 reference software: DMIF plug-ins, decoder plug-ins, and IPMP plug-ins.

14.8.1. DMIF Plug-Ins

DMIF was discussed in detail in Chapter 7. It is the stack that implements content access for diverse networks and platforms [MPEG4-6]. The MPEG standardization effort has gone as far as defining a conceptual DMIF API, or the DAI, which hides the specifics of the content access from the principal player part. It also provides a unified interface to the access procedures for all the scenarios—local file, broadcast, and remote retrieval [M6124].


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