hi,
I recently changed collectpads NEWSEGEMNT behaviour for
newsegment
events to forward them instead of swallowing them. Without
this change
adder was eating these events, thus they never reached the
sink.
Tim pointed out that this might not the correct fix, as we
ideally want
collect the newsegment-events and send one unified event
instead. [1]
I looked over our source (basically did a search for
gst_pad_set_event_function() and looked at muxer/demux
elements). I
found some FIXME comments 
Below is my current analysis. I welcome comments and ideas
Stefan
[1] http
://bugzilla.gnome.org/show_bug.cgi?id=340060
Demux
Mux
UP DOWN Sink Src Sink
Src
GST_EVENT_FLUSH_START x x . . .
spread
GST_EVENT_FLUSH_STOP x x . . .
spread
GST_EVENT_EOS - x . .
collect -
GST_EVENT_NEWSEGMENT - x . . merge
-
GST_EVENT_TAG - x . . .
-
GST_EVENT_BUFFERSIZE - x . . .
-
GST_EVENT_QOS x - spread - -
spread
GST_EVENT_SEEK x - spread - -
spread
GST_EVENT_NAVIGATION x - spread - -
spread
GST_EVENT_DRAIN ?
use gst_pad_set_event_function() to set a custom event
function
= Operations =
spread:
send a copy of the event to all opposite pads
collect:
wait until the event came on all pads, then emit and clear
flags
merge:
somehow merge multiple equal events (same events should be
send just
once). we can remember the last newsegment event for each
pad. if we
have received some events, when can we know that a new
merged newsegment
should be generated and sent out?
= Changes =
collectspads:
* collect for eos, merge for newsegment
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