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gst/gstutils.*: Add two utility functions for tag handling.

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Original commit message from CVS:
* gst/gstutils.c: (gst_element_found_tags_for_pad), (push_and_ref),
(gst_element_found_tags):
* gst/gstutils.h:
Add two utility functions for tag handling.
This commit is contained in:
Ronald S. Bultje 2005-08-16 16:29:04 +00:00
parent efa8cddb95
commit 3b0897e827
3 changed files with 69 additions and 0 deletions
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7
ChangeLog
View file

@ -1,3 +1,10 @@
2005-08-16 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* gst/gstutils.c: (gst_element_found_tags_for_pad), (push_and_ref),
(gst_element_found_tags):
* gst/gstutils.h:
Add two utility functions for tag handling.
2005-08-16 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* docs/manual/advanced-dataaccess.xml:

55
gst/gstutils.c
View file

@ -2382,3 +2382,58 @@ gst_pad_remove_buffer_probe (GstPad * pad, GCallback handler, gpointer data)
count, GST_DEBUG_PAD_NAME (pad), GST_PAD_DO_BUFFER_SIGNALS (pad));
GST_UNLOCK (pad);
}
/**
* gst_element_found_tags_for_pad:
* @element: element for which to post taglist to bus.
* @pad: pad on which to push tag-event.
* @list: the taglist to post on the bus and create event from.
*
* Posts a message to the bus that new tags were found and pushes the
* tags as event. Takes ownership of the taglist.
*/
void
gst_element_found_tags_for_pad (GstElement * element,
GstPad * pad, GstTagList * list)
{
g_return_if_fail (element != NULL);
g_return_if_fail (pad != NULL);
g_return_if_fail (list != NULL);
gst_pad_push_event (pad, gst_event_new_tag (gst_tag_list_copy (list)));
gst_element_post_message (element,
gst_message_new_tag (GST_OBJECT (element), list));
}
static void
push_and_ref (GstPad * pad, GstEvent * event)
{
gst_pad_push_event (pad, gst_event_ref (event));
}
/**
* gst_element_found_tags:
* @element: element for which we found the tags.
* @list: list of tags.
*
* Posts a message to the bus that new tags were found, and pushes an event
* to all sourcepads. Takes ownership of the taglist.
*/
void
gst_element_found_tags (GstElement * element, GstTagList * list)
{
GstIterator *iter;
GstEvent *event;
g_return_if_fail (element != NULL);
g_return_if_fail (list != NULL);
iter = gst_element_iterate_src_pads (element);
event = gst_event_new_tag (gst_tag_list_copy (list));
gst_iterator_foreach (iter, (GFunc) push_and_ref, event);
gst_iterator_free (iter);
gst_event_unref (event);
gst_element_post_message (element,
gst_message_new_tag (GST_OBJECT (element), list));
}

7
gst/gstutils.h
View file

@ -331,6 +331,13 @@ void gst_pad_remove_buffer_probe (GstPad * pad,
GCallback handler,
gpointer data);
/* tag emission utility functions */
void gst_element_found_tags_for_pad (GstElement * element,
GstPad * pad,
GstTagList * list);
void gst_element_found_tags (GstElement * element,
GstTagList * list);
G_END_DECLS
#endif /* __GST_UTILS_H__ */