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pad: add gst_pad_store_sticky_event()

Browse source 
Rewire some internal functions and expose a new
gst_pad_store_sticky_event() function.

API: gst_pad_store_sticky_event()
This commit is contained in:
Wim Taymans 2013-04-04 16:20:24 +02:00
parent 1457c9c499
commit 3e1a430c22
3 changed files with 67 additions and 26 deletions
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91
gst/gstpad.c
View file

@ -4375,8 +4375,8 @@ probe_stopped_unref:
}
/* must be called with pad object lock */
static gboolean
gst_pad_store_sticky_event (GstPad * pad, GstEvent * event)
static GstFlowReturn
store_sticky_event (GstPad * pad, GstEvent * event)
{
guint i, len;
GstEventType type;
@ -4384,6 +4384,12 @@ gst_pad_store_sticky_event (GstPad * pad, GstEvent * event)
gboolean res = FALSE;
const gchar *name = NULL;
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
goto flushed;
if (G_UNLIKELY (GST_PAD_IS_EOS (pad)))
goto eos;
type = GST_EVENT_TYPE (event);
if (type & GST_EVENT_TYPE_STICKY_MULTI)
name = gst_structure_get_name (gst_event_get_structure (event));
@ -4435,7 +4441,49 @@ gst_pad_store_sticky_event (GstPad * pad, GstEvent * event)
break;
}
}
return res;
if (type == GST_EVENT_EOS)
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_EOS);
return GST_FLOW_OK;
/* ERRORS */
flushed:
{
GST_DEBUG_OBJECT (pad, "pad is flushing");
return GST_FLOW_FLUSHING;
}
eos:
{
GST_DEBUG_OBJECT (pad, "pad is EOS");
return GST_FLOW_EOS;
}
}
/**
* gst_pad_store_sticky_event:
* @pad: a #GstPad
* @event: a #GstEvent
*
* Store the sticky @event on @pad
*
* Returns: #GST_FLOW_OK on success, #GST_FLOW_FLUSHING when the pad
* was flushing or #GST_FLOW_EOS when the pad was EOS.
*
* Since: 1.2
*/
GstFlowReturn
gst_pad_store_sticky_event (GstPad * pad, GstEvent * event)
{
GstFlowReturn ret;
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
g_return_val_if_fail (GST_IS_EVENT (event), FALSE);
GST_OBJECT_LOCK (pad);
ret = store_sticky_event (pad, event);
GST_OBJECT_UNLOCK (pad);
return ret;
}
/* should be called with pad LOCK */
@ -4615,21 +4663,17 @@ gst_pad_push_event (GstPad * pad, GstEvent * event)
serialized = GST_EVENT_IS_SERIALIZED (event);
if (sticky) {
/* can't store on flushing pads */
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
goto flushed;
if (G_UNLIKELY (GST_PAD_IS_EOS (pad)))
goto eos;
/* srcpad sticky events are stored immediately, the received flag is set
* to FALSE and will be set to TRUE when we can successfully push the
* event to the peer pad */
if (gst_pad_store_sticky_event (pad, event)) {
GST_DEBUG_OBJECT (pad, "event %s updated", GST_EVENT_TYPE_NAME (event));
switch (store_sticky_event (pad, event)) {
case GST_FLOW_FLUSHING:
goto flushed;
case GST_FLOW_EOS:
goto eos;
default:
break;
}
if (GST_EVENT_TYPE (event) == GST_EVENT_EOS)
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_EOS);
}
if (GST_PAD_IS_SRC (pad) && (serialized || sticky)) {
/* all serialized or sticky events on the srcpad trigger push of
@ -4841,21 +4885,16 @@ gst_pad_send_event_unchecked (GstPad * pad, GstEvent * event,
if (sticky) {
if (ret == GST_FLOW_OK) {
GST_OBJECT_LOCK (pad);
/* can't store on flushing pads */
if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad)))
goto flushing;
if (G_UNLIKELY (GST_PAD_IS_EOS (pad)))
goto eos;
/* after the event function accepted the event, we can store the sticky
* event on the pad */
if (gst_pad_store_sticky_event (pad, event)) {
GST_DEBUG_OBJECT (pad, "event %s updated", GST_EVENT_TYPE_NAME (event));
switch (store_sticky_event (pad, event)) {
case GST_FLOW_FLUSHING:
goto flushing;
case GST_FLOW_EOS:
goto eos;
default:
break;
}
if (event_type == GST_EVENT_EOS)
GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_EOS);
GST_OBJECT_UNLOCK (pad);
}
gst_event_unref (event);

1
gst/gstpad.h
View file

@ -880,6 +880,7 @@ gpointer gst_pad_get_element_private (GstPad *pad);
GstPadTemplate* gst_pad_get_pad_template (GstPad *pad);
GstFlowReturn gst_pad_store_sticky_event (GstPad *pad, GstEvent *event);
GstEvent* gst_pad_get_sticky_event (GstPad *pad, GstEventType event_type,
guint idx);
void gst_pad_sticky_events_foreach (GstPad *pad, GstPadStickyEventsForeachFunction foreach_func, gpointer user_data);

1
win32/common/libgstreamer.def
View file

@ -795,6 +795,7 @@ EXPORTS
gst_pad_start_task
gst_pad_sticky_events_foreach
gst_pad_stop_task
gst_pad_store_sticky_event
gst_pad_template_flags_get_type
gst_pad_template_get_caps
gst_pad_template_get_type