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pad: Add gst_pad_sticky_events_iterate() function

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This commit is contained in:
Sebastian Dröge 2011-05-24 16:08:41 +02:00
parent 53e53386d7
commit 0bcb5a421a
2 changed files with 75 additions and 0 deletions
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62
gst/gstpad.c
View file

@ -5129,6 +5129,68 @@ gst_pad_get_sticky_event (GstPad * pad, GstEventType event_type)
return event;
}
/**
* gst_pad_sticky_events_foreach:
* @pad: the #GstPad that should be used for iteration.
* @foreach_func: (scope call): the #GstPadStickyEventsForeachFunction that should be called for every event.
* @user_data: (closure): the optional user data.
*
* Iterates all active sticky events on @pad and calls @foreach_func for every
* event. If @foreach_func returns something else than GST_FLOW_OK the iteration
* is immediately stopped.
*
* Returns: GST_FLOW_OK if iteration was successful
*/
GstFlowReturn
gst_pad_sticky_events_foreach (GstPad * pad,
GstPadStickyEventsForeachFunction foreach_func, gpointer user_data)
{
GstFlowReturn ret = GST_FLOW_OK;
guint i;
GstEvent *event;
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
g_return_val_if_fail (foreach_func != NULL, GST_FLOW_ERROR);
GST_OBJECT_LOCK (pad);
restart:
for (i = 0; i < GST_EVENT_MAX_STICKY; i++) {
gboolean res;
PadEvent *ev;
ev = &pad->priv->events[i];
/* skip without active event */
if ((event = ev->event) == NULL)
continue;
gst_event_ref (event);
GST_OBJECT_UNLOCK (pad);
res = foreach_func (pad, event, user_data);
GST_OBJECT_LOCK (pad);
gst_event_unref (event);
if (res != GST_FLOW_OK) {
ret = res;
break;
}
/* things could have changed while we release the lock, check if we still
* are handling the same event, if we don't something changed and we have
* to try again. FIXME. we need a cookie here. */
if (event != ev->event) {
GST_DEBUG_OBJECT (pad, "events changed, restarting");
goto restart;
}
}
GST_OBJECT_UNLOCK (pad);
return ret;
}
static void
do_stream_status (GstPad * pad, GstStreamStatusType type,
GThread * thread, GstTask * task)

13
gst/gstpad.h
View file

@ -495,6 +495,18 @@ typedef gboolean (*GstPadDispatcherFunction) (GstPad *pad, gpointer data);
*/
typedef void (*GstPadBlockCallback) (GstPad *pad, gboolean blocked, gpointer user_data);
/**
* GstPadStickyEventsForeachFunction:
* @pad: the #GstPad.
* @event: the sticky #GstEvent.
* @user_data: the #gpointer to optional user data.
*
* Callback used by gst_pad_sticky_events_foreach().
*
* Returns: GST_FLOW_OK if the iteration should continue
*/
typedef GstFlowReturn (*GstPadStickyEventsForeachFunction) (GstPad *pad, GstEvent *event, gpointer user_data);
/**
* GstPadDirection:
* @GST_PAD_UNKNOWN: direction is unknown.
@ -822,6 +834,7 @@ gpointer gst_pad_get_element_private (GstPad *pad);
GstPadTemplate* gst_pad_get_pad_template (GstPad *pad);
GstEvent* gst_pad_get_sticky_event (GstPad *pad, GstEventType event_type);
GstFlowReturn gst_pad_sticky_events_foreach (GstPad *pad, GstPadStickyEventsForeachFunction foreach_func, gpointer user_data);
/* data passing setup functions */
void gst_pad_set_activate_function (GstPad *pad, GstPadActivateFunction activate);