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pad: implement DRAIN handling

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When we forward the DRAIN query and there is nothing to forward it to, assume we
are drained.
When a basesink receives a drain query, reply with TRUE.
This commit is contained in:
Wim Taymans 2012-03-14 16:27:31 +01:00
parent 318baf4cd9
commit e332862985
2 changed files with 43 additions and 2 deletions
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42
gst/gstpad.c
View file

@ -2757,6 +2757,29 @@ filter_done:
return TRUE;
}
typedef struct
{
GstQuery *query;
gboolean result;
gboolean dispatched;
} QueryData;
static gboolean
query_forward_func (GstPad * pad, QueryData * data)
{
/* for each pad we send to, we should ref the query; it's up
* to downstream to unref again when handled. */
GST_LOG_OBJECT (pad, "query peer %p (%s) of %s:%s",
data->query, GST_EVENT_TYPE_NAME (data->query), GST_DEBUG_PAD_NAME (pad));
data->result |= gst_pad_peer_query (pad, data->query);
data->dispatched = TRUE;
/* stop on first successful reply */
return data->result;
}
/**
* gst_pad_query_default:
* @pad: a #GstPad to call the default query handler on.
@ -2804,8 +2827,23 @@ gst_pad_query_default (GstPad * pad, GstObject * parent, GstQuery * query)
}
if (forward) {
ret = gst_pad_forward
(pad, (GstPadForwardFunction) gst_pad_peer_query, query);
QueryData data;
data.query = query;
data.dispatched = FALSE;
data.result = FALSE;
gst_pad_forward (pad, (GstPadForwardFunction) query_forward_func, &data);
if (data.dispatched) {
ret = data.result;
} else {
/* nothing dispatched, could be drained */
if (GST_QUERY_TYPE (query) == GST_QUERY_DRAIN)
ret = TRUE;
else
ret = FALSE;
}
}
return ret;
}

3
libs/gst/base/gstbasesink.c
View file

@ -4550,6 +4550,9 @@ gst_base_sink_default_query (GstBaseSink * basesink, GstQuery * query)
res = TRUE;
break;
}
case GST_QUERY_DRAIN:
res = TRUE;
break;
default:
res =
gst_pad_query_default (basesink->sinkpad, GST_OBJECT_CAST (basesink),