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docs: update docs some more

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This commit is contained in:
Wim Taymans 2011-05-18 11:21:52 +02:00
parent 029ac4597e
commit 4c582b010b
1 changed files with 13 additions and 10 deletions
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23
docs/design/part-events.txt
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@ -39,27 +39,30 @@ Note that the behaviour is not influenced by a flushing pad.
sink pads sink pads
--------- ---------
A gst_pad_send_event() on a sinkpad will put the event into the pending array of When the pad is flushing, the _send_event() function returns WRONG_STATE
sticky tags. immediately.
When the pad is flushing, the _send_event() function returns WRONG_STATE. A gst_pad_send_event() on a sinkpad will check the new event against the
existing event. If they are different, the old event is replaced with the new
event and the event is marked as inactive. If the events are the same, nothing
changes.
When the pad is not flushing, the event function is called for all sticky events The event function is then called for all inactive events. If the function
in the pending array. If the event function returns success, the event is moved returns success, the event is marked active, else the event is removed and set
to the sticky array. If the event function returns failure, the event is removed to NULL in the array.
from the pending array.
This ensures that the event function is never called for flushing pads and that This ensures that the event function is never called for flushing pads and that
the sticky array only contains events for which the event function returned the sticky array only contains events for which the event function returned
success. success.
pad link pad link
-------- --------
When linking pads, all the sticky events from the srcpad are copied to the When linking pads, all the sticky events from the srcpad are copied to the
pending array on the sinkpad. The events will be sent to the event function of array on the sinkpad. All the different events are marked inactive.
the sinkpad on the next event or buffer. The inactive events will be sent to the event function of the sinkpad on the next
event or buffer.
FLUSH_START/STOP FLUSH_START/STOP