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design: live-source: missed markup and flow improvements

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Reynaldo H. Verdejo Pinochet 2017-04-28 16:19:12 -07:00
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markdown/design/live-source.md
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@ -15,21 +15,21 @@ state since such a buffer might never arrive.
Live sources return `NO_PREROLL` when going to the `PAUSED` state to inform
the bin/pipeline that this element will not be able to produce data in
the `PAUSED` state. `NO_PREROLL` should be returned for both READY→PAUSED
and PLAYING→PAUSED.
the `PAUSED` state. `NO_PREROLL` should be returned for both `READY→PAUSED`
and `PLAYING→PAUSED`.
When performing a `get_state()` on a bin with a non-zero timeout value,
the bin must be sure that there are no live sources in the pipeline
because otherwise, the `get_state()` function would block on the sinks.
because otherwise, `get_state()` would block on the sinks.
A gstbin therefore always performs a zero timeout `get_state()` on its
elements to discover the `NO_PREROLL` (and ERROR) elements before
A `GstBin` therefore always performs a zero-timeout `get_state()` on its
elements to discover the `NO_PREROLL` (and `ERROR`) elements before
performing a blocking wait.
## Scheduling
Live sources will not produce data in the `PAUSED` state. They block in
the `get_range()` function or in the loop function until they go to PLAYING.
`get_range()` or in the loop function until they go to `PLAYING`.
## Latency