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gst/gstelement.c: Expose default element send_event and query handling as vmethods that subclasses can chain up to.

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Original commit message from CVS:
* gst/gstelement.c: (gst_element_class_init),
(gst_element_default_send_event), (gst_element_send_event),
(gst_element_default_query), (gst_element_query):
Expose default element send_event and query handling as vmethods that
subclasses can chain up to.
This commit is contained in:
Wim Taymans 2006-12-15 15:49:29 +00:00
parent 06651f5547
commit 0ad3d72cf5
2 changed files with 73 additions and 38 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2006-12-15 Wim Taymans <wim@fluendo.com>
* gst/gstelement.c: (gst_element_class_init),
(gst_element_default_send_event), (gst_element_send_event),
(gst_element_default_query), (gst_element_query):
Expose default element send_event and query handling as vmethods that
subclasses can chain up to.
2006-12-15 Wim Taymans <wim@fluendo.com>
* gst/gstelement.c: (gst_element_set_state_func):

103
gst/gstelement.c
View file

@ -128,6 +128,11 @@ static GstStateChangeReturn gst_element_set_state_func (GstElement * element,
GstState state);
static void gst_element_set_bus_func (GstElement * element, GstBus * bus);
static gboolean gst_element_default_send_event (GstElement * element,
GstEvent * event);
static gboolean gst_element_default_query (GstElement * element,
GstQuery * query);
#ifndef GST_DISABLE_LOADSAVE
static xmlNodePtr gst_element_save_thyself (GstObject * object,
xmlNodePtr parent);
@ -219,6 +224,8 @@ gst_element_class_init (GstElementClass * klass)
klass->set_state = GST_DEBUG_FUNCPTR (gst_element_set_state_func);
klass->get_state = GST_DEBUG_FUNCPTR (gst_element_get_state_func);
klass->set_bus = GST_DEBUG_FUNCPTR (gst_element_set_bus_func);
klass->query = GST_DEBUG_FUNCPTR (gst_element_default_query);
klass->send_event = GST_DEBUG_FUNCPTR (gst_element_default_send_event);
klass->numpadtemplates = 0;
klass->elementfactory = NULL;
@ -695,8 +702,9 @@ no_direction:
* gst_element_release_request_pad() function instead.
*
* Pads are not automatically deactivated so elements should perform the needed
* steps to deactivate the pad in case this pad is removed in the PAUSED or PLAYING
* state. See gst_pad_set_active() for more information about deactivating pads.
* steps to deactivate the pad in case this pad is removed in the PAUSED or
* PLAYING state. See gst_pad_set_active() for more information about
* deactivating pads.
*
* The pad and the element should be unlocked when calling this function.
*
@ -1221,6 +1229,32 @@ wrong_direction:
}
}
static gboolean
gst_element_default_send_event (GstElement * element, GstEvent * event)
{
gboolean result = FALSE;
GstPad *pad;
pad = GST_EVENT_IS_DOWNSTREAM (event) ?
gst_element_get_random_pad (element, TRUE, GST_PAD_SRC) :
gst_element_get_random_pad (element, TRUE, GST_PAD_SINK);
if (pad) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"pushing %s event to random %s pad %s:%s",
GST_EVENT_TYPE_NAME (event),
(GST_PAD_DIRECTION (pad) == GST_PAD_SRC ? "src" : "sink"),
GST_DEBUG_PAD_NAME (pad));
result = gst_pad_push_event (pad, event);
gst_object_unref (pad);
} else {
GST_CAT_INFO (GST_CAT_ELEMENT_PADS, "can't send %s event on element %s",
GST_EVENT_TYPE_NAME (event), GST_ELEMENT_NAME (element));
}
return result;
}
/**
* gst_element_send_event:
* @element: a #GstElement to send the event to.
@ -1253,23 +1287,7 @@ gst_element_send_event (GstElement * element, GstEvent * event)
GST_EVENT_TYPE_NAME (event), GST_ELEMENT_NAME (element));
result = oclass->send_event (element, event);
} else {
GstPad *pad = GST_EVENT_IS_DOWNSTREAM (event) ?
gst_element_get_random_pad (element, TRUE, GST_PAD_SRC) :
gst_element_get_random_pad (element, TRUE, GST_PAD_SINK);
if (pad) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"pushing %s event to random %s pad %s:%s",
GST_EVENT_TYPE_NAME (event),
(GST_PAD_DIRECTION (pad) == GST_PAD_SRC ? "src" : "sink"),
GST_DEBUG_PAD_NAME (pad));
result = gst_pad_push_event (pad, event);
gst_object_unref (pad);
} else {
GST_CAT_INFO (GST_CAT_ELEMENT_PADS, "can't send %s event on element %s",
GST_EVENT_TYPE_NAME (event), GST_ELEMENT_NAME (element));
}
result = gst_element_default_send_event (element, event);
}
return result;
}
@ -1352,6 +1370,33 @@ gst_element_get_query_types (GstElement * element)
return result;
}
static gboolean
gst_element_default_query (GstElement * element, GstQuery * query)
{
gboolean result = FALSE;
GstPad *pad;
pad = gst_element_get_random_pad (element, FALSE, GST_PAD_SRC);
if (pad) {
result = gst_pad_query (pad, query);
gst_object_unref (pad);
} else {
pad = gst_element_get_random_pad (element, TRUE, GST_PAD_SINK);
if (pad) {
GstPad *peer = gst_pad_get_peer (pad);
if (peer) {
result = gst_pad_query (peer, query);
gst_object_unref (peer);
}
gst_object_unref (pad);
}
}
return result;
}
/**
* gst_element_query:
* @element: a #GstElement to perform the query on.
@ -1383,25 +1428,7 @@ gst_element_query (GstElement * element, GstQuery * query)
GST_ELEMENT_NAME (element));
result = oclass->query (element, query);
} else {
GstPad *pad = gst_element_get_random_pad (element, FALSE, GST_PAD_SRC);
if (pad) {
result = gst_pad_query (pad, query);
gst_object_unref (pad);
} else {
pad = gst_element_get_random_pad (element, TRUE, GST_PAD_SINK);
if (pad) {
GstPad *peer = gst_pad_get_peer (pad);
if (peer) {
result = gst_pad_query (peer, query);
gst_object_unref (peer);
}
gst_object_unref (pad);
}
}
result = gst_element_default_query (element, query);
}
return result;
}