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videomixer: Add FIXME comment about the DURATION query from adder

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Currently the code just takes with maximum upstream duration, which
is wrong. It should be the maximum upstream duration in running time.
This commit is contained in:
Sebastian Dröge 2013-05-30 14:48:42 +02:00
parent 5223868caa
commit e2e1d1a158
1 changed files with 16 additions and 0 deletions
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16
gst/videomixer/videomixer2.c
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@ -1119,6 +1119,22 @@ gst_videomixer2_query_caps (GstPad * pad, GstObject * parent, GstQuery * query)
return TRUE;
}
/* FIXME, the duration query should reflect how long you will produce
* data, that is the amount of stream time until you will emit EOS.
*
* For synchronized mixing this is always the max of all the durations
* of upstream since we emit EOS when all of them finished.
*
* We don't do synchronized mixing so this really depends on where the
* streams where punched in and what their relative offsets are against
* eachother which we can get from the first timestamps we see.
*
* When we add a new stream (or remove a stream) the duration might
* also become invalid again and we need to post a new DURATION
* message to notify this fact to the parent.
* For now we take the max of all the upstream elements so the simple
* cases work at least somewhat.
*/
static gboolean
gst_videomixer2_query_duration (GstVideoMixer2 * mix, GstQuery * query)
{