From 4638451539b1ff7e011c92c3bb5bc0107883fdac Mon Sep 17 00:00:00 2001
From: Erik Walthinsen <omega@temple-baptist.org>
Date: Thu, 23 Nov 2000 08:13:43 +0000
Subject: [PATCH] gstbin.c: modified so create_plan occurs after the state
 change of all the child elements.

Original commit message from CVS:
gstbin.c: modified so create_plan occurs after the state change of all the
child elements.
gstelement.c: set_state now loops such that each element only deals with
one state change at a time, i.e. NULL->READY,READY->PLAYING,
instead of a single NULL->PLAYING.
---
 gst/gstbin.c     | 16 ++++++++--------
 gst/gstelement.c | 23 ++++++++++++++++-------
 2 files changed, 24 insertions(+), 15 deletions(-)

diff --git a/gst/gstbin.c b/gst/gstbin.c
index c9d20fd..4f7c670 100644
--- a/gst/gstbin.c
+++ b/gst/gstbin.c
@@ -221,14 +221,6 @@ gst_bin_change_state (GstElement *element)
           _gst_print_statename (GST_STATE (element)), GST_STATE_PENDING (element),
           _gst_print_statename (GST_STATE_PENDING (element)));
 
-  if (GST_STATE_PENDING (element) == GST_STATE_READY) {
-    GstObject *parent;
-
-    parent = gst_object_get_parent (GST_OBJECT (element));
-
-    if (!parent || !GST_IS_BIN (parent))
-      gst_bin_create_plan (bin);
-  }
 //  g_return_val_if_fail(bin->numchildren != 0, GST_STATE_FAILURE);
 
 //  g_print("-->\n");
@@ -253,6 +245,14 @@ gst_bin_change_state (GstElement *element)
   }
 //  g_print("<-- \"%s\"\n",gst_object_get_name(GST_OBJECT(bin)));
 
+  if (GST_STATE_PENDING (element) == GST_STATE_READY) {
+    GstObject *parent;
+
+    parent = gst_object_get_parent (GST_OBJECT (element));
+
+    if (!parent || !GST_IS_BIN (parent))
+      gst_bin_create_plan (bin);
+  }
 
   return gst_bin_change_state_norecurse (bin);
 }
diff --git a/gst/gstelement.c b/gst/gstelement.c
index f568a8a..e6dbcc3 100644
--- a/gst/gstelement.c
+++ b/gst/gstelement.c
@@ -307,6 +307,7 @@ gint
 gst_element_set_state (GstElement *element, GstElementState state) 
 {
   GstElementClass *oclass;
+  GstElementState curpending;
   GstElementStateReturn return_val = GST_STATE_SUCCESS;
 
 //  g_print("gst_element_set_state(\"%s\",%08lx)\n",
@@ -315,14 +316,22 @@ gst_element_set_state (GstElement *element, GstElementState state)
   g_return_val_if_fail (element != NULL, GST_STATE_FAILURE);
   g_return_val_if_fail (GST_IS_ELEMENT (element), GST_STATE_FAILURE);
 
-  // first we set the pending state variable
-  // FIXME should probably check to see that we don't already have one
-  GST_STATE_PENDING (element) = state;
+  curpending = GST_STATE(element);
+  while (GST_STATE(element) != state) {
+    if (curpending < state) curpending++;
+    else curpending--;
 
-  // now we call the state change function so it can set the state
-  oclass = GST_ELEMENT_CLASS (GTK_OBJECT (element)->klass);
-  if (oclass->change_state)
-    return_val = (oclass->change_state)(element);
+    // first we set the pending state variable
+    // FIXME should probably check to see that we don't already have one
+    GST_STATE_PENDING (element) = curpending;
+
+    // now we call the state change function so it can set the state
+    oclass = GST_ELEMENT_CLASS (GTK_OBJECT (element)->klass);
+    if (oclass->change_state)
+      return_val = (oclass->change_state)(element);
+
+    if (return_val == GST_STATE_FAILURE) return return_val;
+  }
 
   return return_val;
 }
-- 
2.7.4