From 8513b4767e0d927a9ab1056aee2c8690e0cff5c1 Mon Sep 17 00:00:00 2001
From: Wim Taymans <wim.taymans@gmail.com>
Date: Thu, 11 Aug 2005 14:24:58 +0000
Subject: [PATCH] gst/gstghostpad.c: Actually implement (re)setting the target
 on a ghostpad as described in the docs.

Original commit message from CVS:
* gst/gstghostpad.c: (gst_proxy_pad_set_target_unlocked),
(gst_proxy_pad_set_target), (gst_proxy_pad_get_target),
(gst_proxy_pad_dispose), (gst_ghost_pad_do_activate_push),
(gst_ghost_pad_do_link), (gst_ghost_pad_set_internal),
(gst_ghost_pad_new_notarget), (gst_ghost_pad_get_target),
(gst_ghost_pad_set_target):
Actually implement (re)setting the target on a ghostpad
as described in the docs.
---
 ChangeLog         | 11 ++++++++++
 gst/gstghostpad.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++------
 2 files changed, 65 insertions(+), 6 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 61a8e20..9f4c93c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2005-08-11  Wim Taymans  <wim@fluendo.com>
+
+	* gst/gstghostpad.c: (gst_proxy_pad_set_target_unlocked),
+	(gst_proxy_pad_set_target), (gst_proxy_pad_get_target),
+	(gst_proxy_pad_dispose), (gst_ghost_pad_do_activate_push),
+	(gst_ghost_pad_do_link), (gst_ghost_pad_set_internal),
+	(gst_ghost_pad_new_notarget), (gst_ghost_pad_get_target),
+	(gst_ghost_pad_set_target):
+	Actually implement (re)setting the target on a ghostpad
+	as described in the docs.
+
 2005-08-10  Tim-Philipp Müller  <tim at centricular dot net>
 
 	* gst/gst.c: (gst_init_check_with_popt_table), (init_pre):
diff --git a/gst/gstghostpad.c b/gst/gstghostpad.c
index 15cdba1..cb710ea 100644
--- a/gst/gstghostpad.c
+++ b/gst/gstghostpad.c
@@ -339,12 +339,16 @@ gst_proxy_pad_do_setcaps (GstPad * pad, GstCaps * caps)
     gst_pad_set_##kind##_function (pad, gst_proxy_pad_do_##kind)
 
 static gboolean
-gst_proxy_pad_set_target (GstPad * pad, GstPad * target)
+gst_proxy_pad_set_target_unlocked (GstPad * pad, GstPad * target)
 {
-  GST_PROXY_LOCK (pad);
+  GstPad *oldtarget;
+
+  GST_DEBUG ("set target %s:%s on %s:%s",
+      GST_DEBUG_PAD_NAME (target), GST_DEBUG_PAD_NAME (pad));
+
   /* clear old target */
-  if (GST_PROXY_PAD_TARGET (pad)) {
-    gst_object_unref (GST_PROXY_PAD_TARGET (pad));
+  if ((oldtarget = GST_PROXY_PAD_TARGET (pad))) {
+    gst_object_unref (oldtarget);
     GST_PROXY_PAD_TARGET (pad) = NULL;
   }
 
@@ -374,9 +378,19 @@ gst_proxy_pad_set_target (GstPad * pad, GstPad * target)
       SETFUNC (checkgetrangefunc, checkgetrange);
     }
   }
+  return TRUE;
+}
+
+static gboolean
+gst_proxy_pad_set_target (GstPad * pad, GstPad * target)
+{
+  gboolean result;
+
+  GST_PROXY_LOCK (pad);
+  result = gst_proxy_pad_set_target_unlocked (pad, target);
   GST_PROXY_UNLOCK (pad);
 
-  return TRUE;
+  return result;
 }
 
 static GstPad *
@@ -762,7 +776,41 @@ gst_ghost_pad_get_target (GstGhostPad * gpad)
 gboolean
 gst_ghost_pad_set_target (GstGhostPad * gpad, GstPad * newtarget)
 {
+  GstPad *internal;
+  GstPad *oldtarget;
+  gboolean result;
+
   g_return_val_if_fail (GST_IS_GHOST_PAD (gpad), FALSE);
 
-  return gst_proxy_pad_set_target (GST_PAD_CAST (gpad), newtarget);
+  GST_PROXY_LOCK (gpad);
+  internal = gpad->internal;
+
+  GST_DEBUG ("set target %s:%s on %s:%s",
+      GST_DEBUG_PAD_NAME (newtarget), GST_DEBUG_PAD_NAME (gpad));
+
+  /* clear old target */
+  if ((oldtarget = GST_PROXY_PAD_TARGET (gpad))) {
+    /* if we have an internal pad, unlink */
+    if (internal) {
+      if (GST_PAD_IS_SRC (internal))
+        gst_pad_unlink (internal, oldtarget);
+      else
+        gst_pad_unlink (oldtarget, internal);
+    }
+  }
+
+  result = gst_proxy_pad_set_target_unlocked (GST_PAD_CAST (gpad), newtarget);
+
+  if (result && newtarget) {
+    /* and link to internal pad if we have one */
+    if (internal) {
+      if (GST_PAD_IS_SRC (internal))
+        result = gst_pad_link (internal, newtarget);
+      else
+        result = gst_pad_link (newtarget, internal);
+    }
+  }
+  GST_PROXY_UNLOCK (gpad);
+
+  return result;
 }
-- 
2.7.4