This is a GstPipeline subclass meant to embed one ore more ipcpipelinesrc elements, and be slaved transparently to the master pipeline, using one ore more ipcpipelinesink elements on the master.
The actual pipeline slaving logic happens in ipcpipelinesrc. The only thing that this class actually does is that it watches the pipeline bus for messages and forwards them to the master pipeline through the ipcpipelinesrc elements that it contains.
For more details about this mechanism and its uses, see the documentation of the ipcpipelinesink element.
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