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[MOVED FROM GST-P-FARSIGHT] Add duration query from adder

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20080515012142-3e2dc-2768199183bfb9d569be1389e382bedc02e3e95e.gz
This commit is contained in:
Olivier Crete 2008-05-15 01:21:42 +00:00 committed by Edward Hervey
parent 3c835d5536
commit 72ca8467eb
1 changed files with 78 additions and 0 deletions
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78
gst/liveadder/liveadder.c
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@ -583,6 +583,81 @@ newseg_wrong_format:
}
}
/* FIXME:
*
* 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_live_adder_query_duration (GstLiveAdder * adder, GstQuery * query)
{
gint64 max;
gboolean res;
GstFormat format;
GstIterator *it;
gboolean done;
/* parse format */
gst_query_parse_duration (query, &format, NULL);
max = -1;
res = TRUE;
done = FALSE;
it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (adder));
while (!done) {
GstIteratorResult ires;
gpointer item;
ires = gst_iterator_next (it, &item);
switch (ires) {
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_OK:
{
GstPad *pad = GST_PAD_CAST (item);
gint64 duration;
/* ask sink peer for duration */
res &= gst_pad_query_peer_duration (pad, &format, &duration);
/* take max from all valid return values */
if (res) {
/* valid unknown length, stop searching */
if (duration == -1) {
max = duration;
done = TRUE;
}
/* else see if bigger than current max */
else if (duration > max)
max = duration;
}
break;
}
case GST_ITERATOR_RESYNC:
max = -1;
res = TRUE;
break;
default:
res = FALSE;
done = TRUE;
break;
}
}
gst_iterator_free (it);
if (res) {
/* and store the max */
gst_query_set_duration (query, format, max);
}
return res;
}
static gboolean
gst_live_adder_query (GstPad * pad, GstQuery * query)
{
@ -664,6 +739,9 @@ gst_live_adder_query (GstPad * pad, GstQuery * query)
}
break;
}
case GST_QUERY_DURATION:
res = gst_live_adder_query_duration (adder, query);
break;
default:
res = gst_pad_query_default (pad, query);
break;