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gstutils: New gst_element_link_pads_full method

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Links the elements with the specified pad linking checks.

API:gst_element_link_pads_full

https://bugzilla.gnome.org/show_bug.cgi?id=622504
This commit is contained in:
Edward Hervey 2010-06-23 17:00:17 +02:00
parent 625c4e2d80
commit 5faf5620f3
4 changed files with 40 additions and 9 deletions
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1
docs/gst/gstreamer-sections.txt
View file

@ -530,6 +530,7 @@ gst_element_unlink
gst_element_link_many
gst_element_unlink_many
gst_element_link_pads
gst_element_link_pads_full
gst_element_unlink_pads
gst_element_link_pads_filtered
gst_element_link_filtered

44
gst/gstutils.c
View file

@ -1532,7 +1532,7 @@ cleanup_fail:
}
static gboolean
pad_link_maybe_ghosting (GstPad * src, GstPad * sink)
pad_link_maybe_ghosting (GstPad * src, GstPad * sink, GstPadLinkCheck flags)
{
GSList *pads_created = NULL;
gboolean ret;
@ -1540,7 +1540,7 @@ pad_link_maybe_ghosting (GstPad * src, GstPad * sink)
if (!prepare_link_maybe_ghosting (&src, &sink, &pads_created)) {
ret = FALSE;
} else {
ret = (gst_pad_link (src, sink) == GST_PAD_LINK_OK);
ret = (gst_pad_link_full (src, sink, flags) == GST_PAD_LINK_OK);
}
if (!ret) {
@ -1552,12 +1552,13 @@ pad_link_maybe_ghosting (GstPad * src, GstPad * sink)
}
/**
* gst_element_link_pads:
* gst_element_link_pads_full:
* @src: a #GstElement containing the source pad.
* @srcpadname: the name of the #GstPad in source element or NULL for any pad.
* @dest: the #GstElement containing the destination pad.
* @destpadname: the name of the #GstPad in destination element,
* or NULL for any pad.
* @flags: the #GstPadLinkCheck to be performed when linking pads.
*
* Links the two named pads of the source and destination elements.
* Side effect is that if one of the pads has no parent, it becomes a
@ -1565,10 +1566,12 @@ pad_link_maybe_ghosting (GstPad * src, GstPad * sink)
* parents, the link fails.
*
* Returns: TRUE if the pads could be linked, FALSE otherwise.
*
* Since: 0.10.30
*/
gboolean
gst_element_link_pads (GstElement * src, const gchar * srcpadname,
GstElement * dest, const gchar * destpadname)
gst_element_link_pads_full (GstElement * src, const gchar * srcpadname,
GstElement * dest, const gchar * destpadname, GstPadLinkCheck flags)
{
const GList *srcpads, *destpads, *srctempls, *desttempls, *l;
GstPad *srcpad, *destpad;
@ -1656,7 +1659,7 @@ gst_element_link_pads (GstElement * src, const gchar * srcpadname,
gboolean result;
/* two explicitly specified pads */
result = pad_link_maybe_ghosting (srcpad, destpad);
result = pad_link_maybe_ghosting (srcpad, destpad, flags);
gst_object_unref (srcpad);
gst_object_unref (destpad);
@ -1683,7 +1686,7 @@ gst_element_link_pads (GstElement * src, const gchar * srcpadname,
temp = gst_element_get_compatible_pad (dest, srcpad, NULL);
}
if (temp && pad_link_maybe_ghosting (srcpad, temp)) {
if (temp && pad_link_maybe_ghosting (srcpad, temp, flags)) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "linked pad %s:%s to pad %s:%s",
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (temp));
if (destpad)
@ -1728,7 +1731,7 @@ gst_element_link_pads (GstElement * src, const gchar * srcpadname,
(GST_PAD_PEER (destpad) == NULL)) {
GstPad *temp = gst_element_get_compatible_pad (src, destpad, NULL);
if (temp && pad_link_maybe_ghosting (temp, destpad)) {
if (temp && pad_link_maybe_ghosting (temp, destpad, flags)) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS, "linked pad %s:%s to pad %s:%s",
GST_DEBUG_PAD_NAME (temp), GST_DEBUG_PAD_NAME (destpad));
gst_object_unref (temp);
@ -1784,7 +1787,7 @@ gst_element_link_pads (GstElement * src, const gchar * srcpadname,
destpad =
gst_element_get_request_pad (dest, desttempl->name_template);
if (srcpad && destpad
&& pad_link_maybe_ghosting (srcpad, destpad)) {
&& pad_link_maybe_ghosting (srcpad, destpad, flags)) {
GST_CAT_DEBUG (GST_CAT_ELEMENT_PADS,
"linked pad %s:%s to pad %s:%s",
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (destpad));
@ -1810,6 +1813,29 @@ gst_element_link_pads (GstElement * src, const gchar * srcpadname,
return FALSE;
}
/**
* gst_element_link_pads:
* @src: a #GstElement containing the source pad.
* @srcpadname: the name of the #GstPad in source element or NULL for any pad.
* @dest: the #GstElement containing the destination pad.
* @destpadname: the name of the #GstPad in destination element,
* or NULL for any pad.
*
* Links the two named pads of the source and destination elements.
* Side effect is that if one of the pads has no parent, it becomes a
* child of the parent of the other element. If they have different
* parents, the link fails.
*
* Returns: TRUE if the pads could be linked, FALSE otherwise.
*/
gboolean
gst_element_link_pads (GstElement * src, const gchar * srcpadname,
GstElement * dest, const gchar * destpadname)
{
return gst_element_link_pads_full (src, srcpadname, dest, destpadname,
GST_PAD_LINK_CHECK_DEFAULT);
}
/**
* gst_element_link_pads_filtered:
* @src: a #GstElement containing the source pad.

3
gst/gstutils.h
View file

@ -1018,6 +1018,9 @@ void gst_element_unlink_many (GstElement *element_1,
gboolean gst_element_link_pads (GstElement *src, const gchar *srcpadname,
GstElement *dest, const gchar *destpadname);
gboolean gst_element_link_pads_full (GstElement *src, const gchar *srcpadname,
GstElement *dest, const gchar *destpadname,
GstPadLinkCheck flags);
void gst_element_unlink_pads (GstElement *src, const gchar *srcpadname,
GstElement *dest, const gchar *destpadname);

1
win32/common/libgstreamer.def
View file

@ -315,6 +315,7 @@ EXPORTS
gst_element_link_many
gst_element_link_pads
gst_element_link_pads_filtered
gst_element_link_pads_full
gst_element_lost_state
gst_element_lost_state_full
gst_element_make_from_uri