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Implement gst_pad_can_link_filtered(). Fix a few minor bugs.

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Original commit message from CVS:
Implement gst_pad_can_link_filtered().  Fix a few minor bugs.
This commit is contained in:
David Schleef 2003-12-24 02:32:42 +00:00
parent 4441d749e9
commit e73192ddb4
1 changed files with 98 additions and 6 deletions
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104
gst/gstpad.c
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@ -1215,7 +1215,6 @@ gst_pad_try_set_caps (GstPad *pad, const GstCaps *caps)
g_return_val_if_fail (pad != NULL, GST_PAD_LINK_REFUSED);
g_return_val_if_fail (GST_IS_PAD (pad), GST_PAD_LINK_REFUSED);
g_return_val_if_fail (GST_PAD_PEER (pad), GST_PAD_LINK_REFUSED);
g_return_val_if_fail (!GST_FLAG_IS_SET (pad, GST_PAD_NEGOTIATING),
GST_PAD_LINK_REFUSED);
@ -1231,6 +1230,11 @@ gst_pad_try_set_caps (GstPad *pad, const GstCaps *caps)
return GST_PAD_LINK_REFUSED;
}
/* we allow setting caps on non-linked pads. It's ignored */
if (!GST_PAD_PEER (pad)) {
return GST_PAD_LINK_OK;
}
g_return_val_if_fail (GST_PAD_LINK_SRC (pad), GST_PAD_LINK_REFUSED);
g_return_val_if_fail (GST_PAD_LINK_SINK (pad), GST_PAD_LINK_REFUSED);
@ -1289,10 +1293,96 @@ gboolean
gst_pad_can_link_filtered (GstPad *srcpad, GstPad *sinkpad,
const GstCaps *filtercaps)
{
/* FIXME */
#if 0
g_warning("unimplemented");
#endif
GstRealPad *realsrc, *realsink;
GstPadLink *link;
/* FIXME This function is gosss. It's almost a direct copy of
* gst_pad_link_filtered(). Any decent programmer would attempt
* to merge the two functions, which I will do some day. --ds
*/
/* generic checks */
g_return_val_if_fail (srcpad != NULL, FALSE);
g_return_val_if_fail (GST_IS_PAD (srcpad), FALSE);
g_return_val_if_fail (sinkpad != NULL, FALSE);
g_return_val_if_fail (GST_IS_PAD (sinkpad), FALSE);
GST_CAT_INFO (GST_CAT_PADS, "trying to link %s:%s and %s:%s",
GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad));
/* now we need to deal with the real/ghost stuff */
realsrc = GST_PAD_REALIZE (srcpad);
realsink = GST_PAD_REALIZE (sinkpad);
if ((GST_PAD (realsrc) != srcpad) || (GST_PAD (realsink) != sinkpad)) {
GST_CAT_INFO (GST_CAT_PADS, "*actually* linking %s:%s and %s:%s",
GST_DEBUG_PAD_NAME (realsrc), GST_DEBUG_PAD_NAME (realsink));
}
/* FIXME: shouldn't we convert this to g_return_val_if_fail? */
if (GST_RPAD_PEER (realsrc) != NULL) {
GST_CAT_INFO (GST_CAT_PADS, "Real source pad %s:%s has a peer, failed",
GST_DEBUG_PAD_NAME (realsrc));
return FALSE;
}
if (GST_RPAD_PEER (realsink) != NULL) {
GST_CAT_INFO (GST_CAT_PADS, "Real sink pad %s:%s has a peer, failed",
GST_DEBUG_PAD_NAME (realsink));
return FALSE;
}
if (GST_PAD_PARENT (realsrc) == NULL) {
GST_CAT_INFO (GST_CAT_PADS, "Real src pad %s:%s has no parent, failed",
GST_DEBUG_PAD_NAME (realsrc));
return FALSE;
}
if (GST_PAD_PARENT (realsink) == NULL) {
GST_CAT_INFO (GST_CAT_PADS, "Real sink pad %s:%s has no parent, failed",
GST_DEBUG_PAD_NAME (realsrc));
return FALSE;
}
if (!gst_pad_check_schedulers (realsrc, realsink)) {
g_warning ("linking pads with different scheds requires "
"exactly one decoupled element (such as queue)");
return FALSE;
}
g_return_val_if_fail (realsrc != NULL, GST_PAD_LINK_REFUSED);
g_return_val_if_fail (realsink != NULL, GST_PAD_LINK_REFUSED);
link = gst_pad_link_new ();
if (GST_RPAD_DIRECTION (realsrc) == GST_PAD_SRC) {
link->srcpad = GST_PAD (realsrc);
link->sinkpad = GST_PAD (realsink);
} else {
link->srcpad = GST_PAD (realsink);
link->sinkpad = GST_PAD (realsrc);
}
if (GST_RPAD_DIRECTION (link->srcpad) != GST_PAD_SRC) {
GST_CAT_INFO (GST_CAT_PADS, "Real src pad %s:%s is not a source pad, failed",
GST_DEBUG_PAD_NAME (link->srcpad));
gst_pad_link_free (link);
return FALSE;
}
if (GST_RPAD_DIRECTION (link->sinkpad) != GST_PAD_SINK) {
GST_CAT_INFO (GST_CAT_PADS, "Real sink pad %s:%s is not a sink pad, failed",
GST_DEBUG_PAD_NAME (link->sinkpad));
gst_pad_link_free (link);
return FALSE;
}
link->srccaps = gst_pad_get_caps (link->srcpad);
link->sinkcaps = gst_pad_get_caps (link->sinkpad);
if (filtercaps) link->filtercaps = gst_caps_copy (filtercaps);
if (!gst_pad_link_ready_for_negotiation (link)) {
return FALSE;
}
gst_pad_link_intersect (link);
if (gst_caps_is_empty (link->caps))
return FALSE;
return TRUE;
}
@ -1775,6 +1865,8 @@ gst_pad_proxy_getcaps (GstPad *pad)
const GList *pads;
GstCaps *caps;
GST_DEBUG ("proxying getcaps for %s:%s\n", GST_DEBUG_PAD_NAME (pad));
element = gst_pad_get_parent (pad);
pads = gst_element_get_pad_list (element);
@ -1785,7 +1877,7 @@ gst_pad_proxy_getcaps (GstPad *pad)
GstCaps *temp;
if (otherpad != pad) {
temp = gst_caps_intersect (caps, gst_pad_get_allowed_caps (pad));
temp = gst_caps_intersect (caps, gst_pad_get_allowed_caps (otherpad));
gst_caps_free (caps);
caps = temp;
}