Pass on the first item only
The first item sent to FirstOnly will be passed on. All other items are ignored.
Displaying the frame rate, just once, from video when it is decoded:
Pipeline( ... DiracDecoder(), FirstOnly(), SimpleDetupler("frame_rate"), ConsoleEchoer(), )
The first data item sent to FirstOnly's "inbox" inbox is immediately sent on out of its "outbox" outbox.
Any subsequent data sent to its "inbox" inbox is discarded.
If a producerFinished or shutdownMicroprocess message is received on the "control" inbox. It is immediately sent on out of the "signal" outbox and the component then immediately terminates.
FirstOnly() -> new FirstOnly component.
Passes on the first item sent to it, and discards everything else.
Methods defined here
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-- Automatic documentation generator, 05 Jun 2009 at 03:01:38 UTC/GMT
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