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  1. Downstream : src element to sink element
  2. Upstream: sink element to src element

Gliffy Diagram
displayNameCommunication Control Flow
nameCommunication Control Flow
pagePin14

Buffer

Actual media data.

A simple buffer consists of:

  • Pointers to memory objects.
  • Timestamp
  • Reference count
  • Flags

Events

Control information.

Messages

Information on elements or pipeline.

A message consist of:

  • Source
  • Type
  • Timestamp

Queries

Request for a specific stream property related to progress tracking.

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