element-maker: improve generation of several classes

Better creation of pads, test and fix many other classes.  Most
classes work now, although might not create functional elements.

21 files changed, 819 insertions, 104 deletions

diff --git a/tools/Makefile.am b/tools/Makefile.am
index 54cdae13e..f501ef353 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -17,4 +17,8 @@ EXTRA_DIST = \
 	gstelement.c \
 	gstpushsrc.c \
 	gsttagdemux.c \
-	gstvideosink.c
+	gstvideosink.c \
+	sinkpad.c \
+	sinkpad-simple.c \
+	srcpad.c \
+	srcpad-simple.c
diff --git a/tools/element-maker b/tools/element-maker
index 02127a97a..60dc35d3b 100755
--- a/tools/element-maker
+++ b/tools/element-maker
@@ -73,6 +73,7 @@ source=gst$class.c
 pkg=`grep -A 10000 '^% pkg-config' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1`
 GST_TYPE_BASE_REPLACE=`grep -A 10000 '^% TYPE_CLASS_NAME' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1`
 GstBaseReplace=`grep -A 10000 '^% ClassName' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1`
+pads=`grep -A 10000 '^% pads' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1`
 
 generate ()
 {
@@ -102,12 +103,12 @@ cat <<-EOF
 /**
  * SECTION:element-$gstreplace
  *
- * The $gstreplace element does FIXME stuff.
+ * The $replace element does FIXME stuff.
  *
  * <refsect2>
  * <title>Example launch line</title>
  * |[
- * gst-launch -v fakesrc ! $gstreplace ! FIXME ! fakesink
+ * gst-launch -v fakesrc ! $replace ! FIXME ! fakesink
  * ]|
  * FIXME Describe what the pipeline does.
  * </refsect2>
@@ -138,6 +139,10 @@ EOF
 grep -A 10000 '^% prototypes' base.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
 grep -A 10000 '^% prototypes' gobject.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
 grep -A 10000 '^% prototypes' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
+for each in $pads
+do
+  grep -A 10000 '^% prototypes' $each.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
+done
 
 cat <<EOF
 
@@ -148,19 +153,14 @@ enum
 
 /* pad templates */
 
-static GstStaticPadTemplate gst_replace_sink_template =
-GST_STATIC_PAD_TEMPLATE ("sink",
-    GST_PAD_SINK,
-    GST_PAD_ALWAYS,
-    GST_STATIC_CAPS ("application/unknown")
-    );
+EOF
 
-static GstStaticPadTemplate gst_replace_src_template =
-GST_STATIC_PAD_TEMPLATE ("src",
-    GST_PAD_SRC,
-    GST_PAD_ALWAYS,
-    GST_STATIC_CAPS ("application/unknown")
-    );
+for each in $pads
+do
+  grep -A 10000 '^% pad-template' $each.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
+done
+
+cat <<EOF
 
 /* class initialization */
 
@@ -172,13 +172,17 @@ gst_replace_base_init (gpointer g_class)
 {
   GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
 
-  gst_element_class_add_pad_template (element_class,
-      gst_static_pad_template_get (&gst_replace_src_template));
-  gst_element_class_add_pad_template (element_class,
-      gst_static_pad_template_get (&gst_replace_sink_template));
+EOF
 
-  gst_element_class_set_details_simple (element_class, "FIXME",
-      "Generic", "FIXME", "$REAL_NAME <$EMAIL_ADDRESS>");
+for each in $pads
+do
+  grep -A 10000 '^% base-init' $each.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
+done
+
+cat <<EOF
+
+  gst_element_class_set_details_simple (element_class, "FIXME Long name",
+      "Generic", "FIXME Description", "$REAL_NAME <$EMAIL_ADDRESS>");
 }
 
 static void
@@ -202,7 +206,15 @@ cat <<EOF
 static void
 gst_replace_init (GstReplace * replace, GstReplaceClass * replace_class)
 {
+EOF
+
+for each in $pads
+do
+  grep -A 10000 '^% instance-init' $each.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
+done
 
+
+cat <<EOF
 }
 EOF
 
@@ -210,6 +222,10 @@ EOF
 grep -A 10000 '^% methods' base.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
 grep -A 10000 '^% methods' gobject.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
 grep -A 10000 '^% methods' $source | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
+for each in $pads
+do
+  grep -A 10000 '^% methods' $each.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
+done
 
 
 cat <<EOF
@@ -224,16 +240,24 @@ plugin_init (GstPlugin * plugin)
   return TRUE;
 }
 
+#ifndef VERSION
 #define VERSION "0.0.FIXME"
+#endif
+#ifndef PACKAGE
 #define PACKAGE "FIXME_package"
+#endif
+#ifndef PACKAGE_NAME
 #define PACKAGE_NAME "FIXME_package_name"
-#define PACKAGE_ORIGIN "http://FIXME.org/"
+#endif
+#ifndef GST_PACKAGE_ORIGIN
+#define GST_PACKAGE_ORIGIN "http://FIXME.org/"
+#endif
 
 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
     GST_VERSION_MINOR,
     "replace",
-    "FIXME",
-    plugin_init, VERSION, "LGPL", PACKAGE_NAME, PACKAGE_ORIGIN)
+    "FIXME plugin description",
+    plugin_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)
 
 EOF
 
@@ -277,6 +301,14 @@ struct _GstReplace
 {
   GstBaseReplace base_replace;
 
+EOF
+
+for each in $pads
+do
+  grep -A 10000 '^% instance-members' $each.c | tail -n +2|grep -m 1 -B 10000 '^%'|head -n -1
+done
+
+cat <<EOF
 };
 
 struct _GstReplaceClass
diff --git a/tools/gstaudiofilter.c b/tools/gstaudiofilter.c
index 018128153..698e756b4 100644
--- a/tools/gstaudiofilter.c
+++ b/tools/gstaudiofilter.c
@@ -2,6 +2,8 @@
 GstAudioFilter
 % TYPE_CLASS_NAME
 GST_TYPE_AUDIO_FILTER
+% pads
+sinkpad-simple srcpad-simple
 % pkg-config
 gstreamer-audio-0.10
 % includes
diff --git a/tools/gstaudiosink.c b/tools/gstaudiosink.c
index 9c2a58c7b..645993ae0 100644
--- a/tools/gstaudiosink.c
+++ b/tools/gstaudiosink.c
@@ -2,57 +2,71 @@
 GstAudioSink
 % TYPE_CLASS_NAME
 GST_TYPE_AUDIO_SINK
+% pads
+sinkpad-simple
 % pkg-config
 gstreamer-audio-0.10
 % includes
 #include <gst/audio/gstaudiosink.h>
 % prototypes
-static gboolean gst_replace_open (GstAudioSrc * src);
+static gboolean gst_replace_open (GstAudioSink * sink);
 static gboolean
-gst_replace_prepare (GstAudioSrc * src, GstRingBufferSpec * spec);
-static gboolean gst_replace_unprepare (GstAudioSrc * src);
-static gboolean gst_replace_close (GstAudioSrc * src);
-static guint gst_replace_read (GstAudioSrc * src, gpointer data, guint length);
-static guint gst_replace_delay (GstAudioSrc * src);
-static void gst_replace_reset (GstAudioSrc * src);
+gst_replace_prepare (GstAudioSink * sink, GstRingBufferSpec * spec);
+static gboolean gst_replace_unprepare (GstAudioSink * sink);
+static gboolean gst_replace_close (GstAudioSink * sink);
+static guint gst_replace_write (GstAudioSink * sink, gpointer data, guint length);
+static guint gst_replace_delay (GstAudioSink * sink);
+static void gst_replace_reset (GstAudioSink * sink);
 % declare-class
-  GstAudioSink *audio_sink_class = GST_AUDIO_SINK (klass);
+  GstAudioSinkClass *audio_sink_class = GST_AUDIO_SINK_CLASS (klass);
 % set-methods
-  audio_sink_class-> = GST_DEBUG_FUNCPTR (gst_replace_);
+  audio_sink_class->open = GST_DEBUG_FUNCPTR (gst_replace_open);
+  audio_sink_class->prepare = GST_DEBUG_FUNCPTR (gst_replace_prepare);
+  audio_sink_class->unprepare = GST_DEBUG_FUNCPTR (gst_replace_unprepare);
+  audio_sink_class->close = GST_DEBUG_FUNCPTR (gst_replace_close);
+  audio_sink_class->write = GST_DEBUG_FUNCPTR (gst_replace_write);
+  audio_sink_class->delay = GST_DEBUG_FUNCPTR (gst_replace_delay);
+  audio_sink_class->reset = GST_DEBUG_FUNCPTR (gst_replace_reset);
 % methods
 
 static gboolean
-gst_replace_open (GstAudioSrc * src)
+gst_replace_open (GstAudioSink * sink)
 {
+  return FALSE;
 }
 
 static gboolean
-gst_replace_prepare (GstAudioSrc * src, GstRingBufferSpec * spec)
+gst_replace_prepare (GstAudioSink * sink, GstRingBufferSpec * spec)
 {
+  return FALSE;
 }
 
 static gboolean
-gst_replace_unprepare (GstAudioSrc * src)
+gst_replace_unprepare (GstAudioSink * sink)
 {
+  return FALSE;
 }
 
 static gboolean
-gst_replace_close (GstAudioSrc * src)
+gst_replace_close (GstAudioSink * sink)
 {
+  return FALSE;
 }
 
 static guint
-gst_replace_read (GstAudioSrc * src, gpointer data, guint length)
+gst_replace_write (GstAudioSink * sink, gpointer data, guint length)
 {
+  return 0;
 }
 
 static guint
-gst_replace_delay (GstAudioSrc * src)
+gst_replace_delay (GstAudioSink * sink)
 {
+  return 0;
 }
 
 static void
-gst_replace_reset (GstAudioSrc * src)
+gst_replace_reset (GstAudioSink * sink)
 {
 }
 % end
diff --git a/tools/gstaudiosrc.c b/tools/gstaudiosrc.c
index 95f20e752..051211e56 100644
--- a/tools/gstaudiosrc.c
+++ b/tools/gstaudiosrc.c
@@ -2,58 +2,72 @@
 GstAudioSrc
 % TYPE_CLASS_NAME
 GST_TYPE_AUDIO_SRC
+% pads
+srcpad-simple
 % pkg-config
 gstreamer-audio-0.10
 % includes
 #include <gst/audio/gstaudiosrc.h>
 % prototypes
-static gboolean gst_replace_open (GstAudioSink * sink);
+static gboolean gst_replace_open (GstAudioSrc * src);
 static gboolean
-gst_replace_prepare (GstAudioSink * sink, GstRingBufferSpec * spec);
-static gboolean gst_replace_unprepare (GstAudioSink * sink);
-static gboolean gst_replace_close (GstAudioSink * sink);
+gst_replace_prepare (GstAudioSrc * src, GstRingBufferSpec * spec);
+static gboolean gst_replace_unprepare (GstAudioSrc * src);
+static gboolean gst_replace_close (GstAudioSrc * src);
 static guint
-gst_replace_write (GstAudioSink * sink, gpointer data, guint length);
-static guint gst_replace_delay (GstAudioSink * sink);
-static void gst_replace_reset (GstAudioSink * sink);
+gst_replace_read (GstAudioSrc * src, gpointer data, guint length);
+static guint gst_replace_delay (GstAudioSrc * src);
+static void gst_replace_reset (GstAudioSrc * src);
 % declare-class
-  GstAudioSrc *audio_src_class = GST_AUDIO_SRC (klass);
+  GstAudioSrcClass *audio_src_class = GST_AUDIO_SRC_CLASS (klass);
 % set-methods
-  audio_src_class-> = GST_DEBUG_FUNCPTR (gst_replace_);
+  audio_src_class->open = GST_DEBUG_FUNCPTR (gst_replace_open);
+  audio_src_class->prepare = GST_DEBUG_FUNCPTR (gst_replace_prepare);
+  audio_src_class->unprepare = GST_DEBUG_FUNCPTR (gst_replace_unprepare);
+  audio_src_class->close = GST_DEBUG_FUNCPTR (gst_replace_close);
+  audio_src_class->read = GST_DEBUG_FUNCPTR (gst_replace_read);
+  audio_src_class->delay = GST_DEBUG_FUNCPTR (gst_replace_delay);
+  audio_src_class->reset = GST_DEBUG_FUNCPTR (gst_replace_reset);
 % methods
 
 static gboolean
-gst_replace_open (GstAudioSink * sink)
+gst_replace_open (GstAudioSrc * src)
 {
+  return FALSE;
 }
 
 static gboolean
-gst_replace_prepare (GstAudioSink * sink, GstRingBufferSpec * spec)
+gst_replace_prepare (GstAudioSrc * src, GstRingBufferSpec * spec)
 {
+  return FALSE;
 }
 
 static gboolean
-gst_replace_unprepare (GstAudioSink * sink)
+gst_replace_unprepare (GstAudioSrc * src)
 {
+  return FALSE;
 }
 
 static gboolean
-gst_replace_close (GstAudioSink * sink)
+gst_replace_close (GstAudioSrc * src)
 {
+  return FALSE;
 }
 
 static guint
-gst_replace_write (GstAudioSink * sink, gpointer data, guint length)
+gst_replace_read (GstAudioSrc * src, gpointer data, guint length)
 {
+  return 0;
 }
 
 static guint
-gst_replace_delay (GstAudioSink * sink)
+gst_replace_delay (GstAudioSrc * src)
 {
+  return 0;
 }
 
 static void
-gst_replace_reset (GstAudioSink * sink)
+gst_replace_reset (GstAudioSrc * src)
 {
 }
 % end
diff --git a/tools/gstbaseaudiosink.c b/tools/gstbaseaudiosink.c
index 2f36e84c9..695b685fb 100644
--- a/tools/gstbaseaudiosink.c
+++ b/tools/gstbaseaudiosink.c
@@ -2,6 +2,8 @@
 GstBaseAudioSink
 % TYPE_CLASS_NAME
 GST_TYPE_BASE_AUDIO_SINK
+% pads
+sinkpad-simple
 % pkg-config
 gstreamer-audio-0.10
 % includes
@@ -9,14 +11,14 @@ gstreamer-audio-0.10
 % prototypes
 static GstRingBuffer *gst_replace_create_ringbuffer (GstBaseAudioSink * sink);
 % declare-class
-  GstBaseAudioSink *base_audio_sink_class = GST_BASE_AUDIO_SINK (klass);
+  GstBaseAudioSinkClass *base_audio_sink_class = GST_BASE_AUDIO_SINK_CLASS (klass);
 % set-methods
-  base_audio_sink_class-> = GST_DEBUG_FUNCPTR (gst_replace_);
+  base_audio_sink_class->create_ringbuffer = GST_DEBUG_FUNCPTR (gst_replace_create_ringbuffer);
 % methods
 
 static GstRingBuffer *
 gst_replace_create_ringbuffer (GstBaseAudioSink * sink)
 {
-
+  return NULL;
 }
 % end
diff --git a/tools/gstbaseaudiosrc.c b/tools/gstbaseaudiosrc.c
index c87bb32c0..6ef302b0e 100644
--- a/tools/gstbaseaudiosrc.c
+++ b/tools/gstbaseaudiosrc.c
@@ -2,6 +2,8 @@
 GstBaseAudioSrc
 % TYPE_CLASS_NAME
 GST_TYPE_BASE_AUDIO_SRC
+% pads
+srcpad-simple
 % pkg-config
 gstreamer-audio-0.10
 % includes
@@ -9,14 +11,15 @@ gstreamer-audio-0.10
 % prototypes
 static GstRingBuffer *gst_replace_create_ringbuffer (GstBaseAudioSrc * src);
 % declare-class
-  GstBaseAudioSrc *base_audio_src_class = GST_BASE_AUDIO_SRC (klass);
+  GstBaseAudioSrcClass *base_audio_src_class = GST_BASE_AUDIO_SRC_CLASS (klass);
 % set-methods
-  base_audio_src_class-> = GST_DEBUG_FUNCPTR (gst_replace_);
+  base_audio_src_class->create_ringbuffer = GST_DEBUG_FUNCPTR (gst_replace_create_ringbuffer);
 % methods
 
 static GstRingBuffer *
 gst_replace_create_ringbuffer (GstBaseAudioSrc * src)
 {
 
+  return NULL;
 }
 % end
diff --git a/tools/gstbasertpdepayload.c b/tools/gstbasertpdepayload.c
index b0810be25..8257a3271 100644
--- a/tools/gstbasertpdepayload.c
+++ b/tools/gstbasertpdepayload.c
@@ -2,6 +2,8 @@
 GstBaseRTPDepayload
 % TYPE_CLASS_NAME
 GST_TYPE_BASE_RTP_DEPAYLOAD
+% pads
+sinkpad-simple srcpad-simple
 % pkg-config
 gstreamer-rtp-0.10
 % includes
diff --git a/tools/gstbasertppayload.c b/tools/gstbasertppayload.c
index a871e901c..65d216f64 100644
--- a/tools/gstbasertppayload.c
+++ b/tools/gstbasertppayload.c
@@ -2,6 +2,8 @@
 GstBaseRTPPayload
 % TYPE_CLASS_NAME
 GST_TYPE_BASE_RTP_PAYLOAD
+% pads
+sinkpad-simple srcpad-simple
 % pkg-config
 gstreamer-rtp-0.10
 % includes
diff --git a/tools/gstbasesink.c b/tools/gstbasesink.c
index 6646dd9f9..26ad3f921 100644
--- a/tools/gstbasesink.c
+++ b/tools/gstbasesink.c
@@ -2,6 +2,8 @@
 GstBaseSink
 % TYPE_CLASS_NAME
 GST_TYPE_BASE_SINK
+% pads
+sinkpad-simple
 % pkg-config
 gstreamer-base-0.10
 % includes
diff --git a/tools/gstbasesrc.c b/tools/gstbasesrc.c
index 240a16d25..048e274dd 100644
--- a/tools/gstbasesrc.c
+++ b/tools/gstbasesrc.c
@@ -2,6 +2,8 @@
 GstBaseSrc
 % TYPE_CLASS_NAME
 GST_TYPE_BASE_SRC
+% pads
+srcpad-simple
 % pkg-config
 gstreamer-base-0.10
 % includes
diff --git a/tools/gstbasetransform.c b/tools/gstbasetransform.c
index 47d42d39f..7dcbc8588 100644
--- a/tools/gstbasetransform.c
+++ b/tools/gstbasetransform.c
@@ -2,8 +2,12 @@
 GstBaseTransform
 % TYPE_CLASS_NAME
 GST_TYPE_BASE_TRANSFORM
+% pads
+sinkpad-simple srcpad-simple
 % pkg-config
 gstreamer-base-0.10
+% pads
+sinkpad-simple srcpad-simple
 % includes
 #include <gst/base/gstbasetransform.h>
 % prototypes
diff --git a/tools/gstcddabasesrc.c b/tools/gstcddabasesrc.c
index d0e0a804f..201a843c9 100644
--- a/tools/gstcddabasesrc.c
+++ b/tools/gstcddabasesrc.c
@@ -2,6 +2,8 @@
 GstCddaBaseSrc
 % TYPE_CLASS_NAME
 GST_TYPE_CDDA_BASE_SRC
+% pads
+srcpad-simple
 % pkg-config
 gstreamer-cdda-0.10
 % includes
diff --git a/tools/gstelement.c b/tools/gstelement.c
index 293341cdd..c9e05c66c 100644
--- a/tools/gstelement.c
+++ b/tools/gstelement.c
@@ -2,6 +2,8 @@
 GstElement
 % TYPE_CLASS_NAME
 GST_TYPE_ELEMENT
+% pads
+sinkpad srcpad
 % pkg-config
 gstreamer-0.10
 % includes
@@ -11,35 +13,24 @@ static GstPad *gst_replace_request_new_pad (GstElement * element,
     GstPadTemplate * templ, const gchar * name);
 static void gst_replace_release_pad (GstElement * element, GstPad * pad);
 static GstStateChangeReturn
-gst_replace_get_state (GstElement * element, GstState * state,
-    GstState * pending, GstClockTime timeout);
-static GstStateChangeReturn
-gst_replace_set_state (GstElement * element, GstState state);
-static GstStateChangeReturn
 gst_replace_change_state (GstElement * element, GstStateChange transition);
-static void gst_replace_set_bus (GstElement * element, GstBus * bus);
 static GstClock *gst_replace_provide_clock (GstElement * element);
 static gboolean gst_replace_set_clock (GstElement * element, GstClock * clock);
 static GstIndex *gst_replace_get_index (GstElement * element);
 static void gst_replace_set_index (GstElement * element, GstIndex * index);
 static gboolean gst_replace_send_event (GstElement * element, GstEvent * event);
-static const GstQueryType *gst_replace_get_query_types (GstElement * element);
 static gboolean gst_replace_query (GstElement * element, GstQuery * query);
 % declare-class
   GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
 % set-methods
   element_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_replace_request_new_pad);
   element_class->release_pad = GST_DEBUG_FUNCPTR (gst_replace_release_pad);
-  element_class->get_state = GST_DEBUG_FUNCPTR (gst_replace_get_state);
-  element_class->set_state = GST_DEBUG_FUNCPTR (gst_replace_set_state);
   element_class->change_state = GST_DEBUG_FUNCPTR (gst_replace_change_state);
-  element_class->set_bus = GST_DEBUG_FUNCPTR (gst_replace_set_bus);
   element_class->provide_clock = GST_DEBUG_FUNCPTR (gst_replace_provide_clock);
   element_class->set_clock = GST_DEBUG_FUNCPTR (gst_replace_set_clock);
   element_class->get_index = GST_DEBUG_FUNCPTR (gst_replace_get_index);
   element_class->set_index = GST_DEBUG_FUNCPTR (gst_replace_set_index);
   element_class->send_event = GST_DEBUG_FUNCPTR (gst_replace_send_event);
-  element_class->get_query_types = GST_DEBUG_FUNCPTR (gst_replace_get_query_types);
   element_class->query = GST_DEBUG_FUNCPTR (gst_replace_query);
 % methods
 
@@ -59,31 +50,39 @@ gst_replace_release_pad (GstElement * element, GstPad * pad)
 }
 
 static GstStateChangeReturn
-gst_replace_get_state (GstElement * element, GstState * state,
-    GstState * pending, GstClockTime timeout)
-{
-
-  return GST_STATE_CHANGE_SUCCESS;
-}
-
-static GstStateChangeReturn
-gst_replace_set_state (GstElement * element, GstState state)
-{
-
-  return GST_STATE_CHANGE_SUCCESS;
-}
-
-static GstStateChangeReturn
 gst_replace_change_state (GstElement * element, GstStateChange transition)
 {
-
-  return GST_STATE_CHANGE_SUCCESS;
-}
-
-static void
-gst_replace_set_bus (GstElement * element, GstBus * bus)
-{
-
+  GstReplace *replace;
+  GstStateChangeReturn ret;
+
+  g_return_val_if_fail (GST_IS_REPLACE (element), GST_STATE_CHANGE_FAILURE);
+  replace = GST_REPLACE (element);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      break;
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      break;
+    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
+      break;
+    default:
+      break;
+  }
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
+      break;
+    case GST_STATE_CHANGE_PAUSED_TO_READY:
+      break;
+    case GST_STATE_CHANGE_READY_TO_NULL:
+      break;
+    default:
+      break;
+  }
+
+  return ret;
 }
 
 static GstClock *
@@ -120,13 +119,6 @@ gst_replace_send_event (GstElement * element, GstEvent * event)
   return TRUE;
 }
 
-static const GstQueryType *
-gst_replace_get_query_types (GstElement * element)
-{
-
-  return NULL;
-}
-
 static gboolean
 gst_replace_query (GstElement * element, GstQuery * query)
 {
diff --git a/tools/gstpushsrc.c b/tools/gstpushsrc.c
index 5db8e7630..a35595085 100644
--- a/tools/gstpushsrc.c
+++ b/tools/gstpushsrc.c
@@ -2,6 +2,8 @@
 GstPushSrc
 % TYPE_CLASS_NAME
 GST_TYPE_PUSH_SRC
+% pads
+srcpad-simple
 % pkg-config
 gstreamer-base-0.10
 % includes
@@ -9,14 +11,15 @@ gstreamer-base-0.10
 % prototypes
 static GstFlowReturn gst_replace_create (GstPushSrc * src, GstBuffer ** buf);
 % declare-class
-  GstPushSrc *pushsrc_class = GST_PUSHSRC (klass);
+  GstPushSrcClass *pushsrc_class = GST_PUSH_SRC_CLASS (klass);
 % set-methods
-  pushsrc_class-> = GST_DEBUG_FUNCPTR (gst_replace_);
+  pushsrc_class->create = GST_DEBUG_FUNCPTR (gst_replace_create);
 % methods
 
 static GstFlowReturn
 gst_replace_create (GstPushSrc * src, GstBuffer ** buf)
 {
 
+  return GST_FLOW_OK;
 }
 % end
diff --git a/tools/gsttagdemux.c b/tools/gsttagdemux.c
index 7ddec9d87..6cdfb58d8 100644
--- a/tools/gsttagdemux.c
+++ b/tools/gsttagdemux.c
@@ -2,6 +2,8 @@
 GstTagDemux
 % TYPE_CLASS_NAME
 GST_TYPE_TAG_DEMUX
+% pads
+sinkpad-simple srcpad-simple
 % pkg-config
 gstreamer-tag-0.10
 % includes
diff --git a/tools/gstvideosink.c b/tools/gstvideosink.c
index ce12a07f3..72a9e8878 100644
--- a/tools/gstvideosink.c
+++ b/tools/gstvideosink.c
@@ -2,6 +2,8 @@
 GstVideoSink
 % TYPE_CLASS_NAME
 GST_TYPE_VIDEO_SINK
+% pads
+sinkpad-simple
 % pkg-config
 gstreamer-video-0.10
 % includes
diff --git a/tools/sinkpad-simple.c b/tools/sinkpad-simple.c
new file mode 100644
index 000000000..9a031fc15
--- /dev/null
+++ b/tools/sinkpad-simple.c
@@ -0,0 +1,23 @@
+
+% instance-members
+  GstPad *sinkpad;
+% prototypes
+% pad-template
+static GstStaticPadTemplate gst_replace_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/unknown")
+    );
+
+% base-init
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_replace_sink_template));
+% instance-init
+
+  replace->sinkpad = gst_pad_new_from_static_template (&gst_replace_sink_template
+      ,     
+            "sink");
+% methods
+% end
+
diff --git a/tools/sinkpad.c b/tools/sinkpad.c
new file mode 100644
index 000000000..87babbc7f
--- /dev/null
+++ b/tools/sinkpad.c
@@ -0,0 +1,311 @@
+
+% instance-members
+  GstPad *sinkpad;
+% prototypes
+
+static GstCaps* gst_replace_sink_getcaps (GstPad *pad);
+static gboolean gst_replace_sink_setcaps (GstPad *pad, GstCaps *caps);
+static gboolean gst_replace_sink_acceptcaps (GstPad *pad, GstCaps *caps);
+static void gst_replace_sink_fixatecaps (GstPad *pad, GstCaps *caps);
+static gboolean gst_replace_sink_activate (GstPad *pad);
+static gboolean gst_replace_sink_activatepush (GstPad *pad, gboolean active);
+static gboolean gst_replace_sink_activatepull (GstPad *pad, gboolean active);
+static GstPadLinkReturn gst_replace_sink_link (GstPad *pad, GstPad *peer);
+static void gst_replace_sink_unlink (GstPad *pad);
+static GstFlowReturn gst_replace_sink_chain (GstPad *pad, GstBuffer *buffer);
+static GstFlowReturn gst_replace_sink_chainlist (GstPad *pad, GstBufferList *bufferlist);
+static gboolean gst_replace_sink_event (GstPad *pad, GstEvent *event);
+static gboolean gst_replace_sink_query (GstPad *pad, GstQuery *query);
+static GstFlowReturn gst_replace_sink_bufferalloc (GstPad *pad, guint64 offset, guint size,
+    GstCaps *caps, GstBuffer **buf);
+static GstIterator * gst_replace_sink_iterintlink (GstPad *pad);
+
+% pad-template
+static GstStaticPadTemplate gst_replace_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/unknown")
+    );
+
+% base-init
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_replace_sink_template));
+% instance-init
+
+  replace->sinkpad = gst_pad_new_from_static_template (&gst_replace_sink_template
+      ,     
+            "sink");
+  gst_pad_set_getcaps_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_getcaps));
+  gst_pad_set_setcaps_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_setcaps));
+  gst_pad_set_acceptcaps_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_acceptcaps));
+  gst_pad_set_fixatecaps_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_fixatecaps));
+  gst_pad_set_activate_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_activate));
+  gst_pad_set_activatepush_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_activatepush));
+  gst_pad_set_activatepull_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_activatepull));
+  gst_pad_set_link_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_link));
+  gst_pad_set_unlink_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_unlink));
+  gst_pad_set_chain_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_chain));
+  gst_pad_set_chain_list_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_chainlist));
+  gst_pad_set_event_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_event));
+  gst_pad_set_query_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_query));
+  gst_pad_set_bufferalloc_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_bufferalloc));
+  gst_pad_set_iterate_internal_links_function (replace->sinkpad,
+            GST_DEBUG_FUNCPTR(gst_replace_sink_iterintlink));
+  gst_element_add_pad (GST_ELEMENT(replace), replace->sinkpad);
+
+
+% methods
+
+static GstCaps*
+gst_replace_sink_getcaps (GstPad *pad)
+{
+  GstReplace *replace;
+  GstCaps *caps;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "getcaps");
+
+  caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
+
+  gst_object_unref (replace);
+  return caps;
+}
+
+static gboolean
+gst_replace_sink_setcaps (GstPad *pad, GstCaps *caps)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "setcaps");
+
+
+  gst_object_unref (replace);
+  return TRUE;
+}
+
+static gboolean
+gst_replace_sink_acceptcaps (GstPad *pad, GstCaps *caps)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "acceptcaps");
+
+
+  gst_object_unref (replace);
+  return TRUE;
+}
+
+static void
+gst_replace_sink_fixatecaps (GstPad *pad, GstCaps *caps)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "fixatecaps");
+
+
+  gst_object_unref (replace);
+}
+
+static gboolean
+gst_replace_sink_activate (GstPad *pad)
+{
+  GstReplace *replace;
+  gboolean ret;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "activate");
+
+  if (gst_pad_check_pull_range (pad)) {
+    GST_DEBUG_OBJECT (pad, "activating pull");
+    ret = gst_pad_activate_pull (pad, TRUE);
+  } else {
+    GST_DEBUG_OBJECT (pad, "activating push");
+    ret = gst_pad_activate_push (pad, TRUE);
+  }
+
+  gst_object_unref (replace);
+  return ret;
+}
+
+static gboolean
+gst_replace_sink_activatepush (GstPad *pad, gboolean active)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "activatepush");
+
+
+  gst_object_unref (replace);
+  return TRUE;
+}
+
+static gboolean
+gst_replace_sink_activatepull (GstPad *pad, gboolean active)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "activatepull");
+
+
+  gst_object_unref (replace);
+  return TRUE;
+}
+
+static GstPadLinkReturn
+gst_replace_sink_link (GstPad *pad, GstPad *peer)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "link");
+
+
+  gst_object_unref (replace);
+  return GST_PAD_LINK_OK;
+}
+
+static void
+gst_replace_sink_unlink (GstPad *pad)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "unlink");
+
+
+  gst_object_unref (replace);
+}
+
+static GstFlowReturn
+gst_replace_sink_chain (GstPad *pad, GstBuffer *buffer)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "chain");
+
+
+  gst_object_unref (replace);
+  return GST_FLOW_OK;
+}
+
+static GstFlowReturn
+gst_replace_sink_chainlist (GstPad *pad, GstBufferList *bufferlist)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "chainlist");
+
+
+  gst_object_unref (replace);
+  return GST_FLOW_OK;
+}
+
+static gboolean
+gst_replace_sink_event (GstPad *pad, GstEvent *event)
+{
+  gboolean res;
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "event");
+
+  switch (GST_EVENT_TYPE (event)) {
+    default:
+      res = gst_pad_event_default (pad, event);
+      break;
+  }
+
+  gst_object_unref (replace);
+  return res;
+}
+
+static gboolean
+gst_replace_sink_query (GstPad *pad, GstQuery *query)
+{
+  gboolean res;
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "query");
+
+  switch (GST_QUERY_TYPE(query)) {
+    default:
+      res = gst_pad_query_default (pad, query);
+      break;
+  }
+
+  gst_object_unref (replace);
+  return res;
+}
+
+static GstFlowReturn
+gst_replace_sink_bufferalloc (GstPad *pad, guint64 offset, guint size,
+    GstCaps *caps, GstBuffer **buf)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "bufferalloc");
+
+
+  *buf = gst_buffer_new_and_alloc (size);
+  gst_buffer_set_caps (*buf, caps);
+
+  gst_object_unref (replace);
+  return GST_FLOW_OK;
+}
+
+static GstIterator *
+gst_replace_sink_iterintlink (GstPad *pad)
+{
+  GstReplace *replace;
+  GstIterator *iter;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "iterintlink");
+
+  iter = gst_pad_iterate_internal_links_default (pad);
+
+  gst_object_unref (replace);
+  return iter;
+}
+
+% end
+
diff --git a/tools/srcpad-simple.c b/tools/srcpad-simple.c
new file mode 100644
index 000000000..42db8d385
--- /dev/null
+++ b/tools/srcpad-simple.c
@@ -0,0 +1,23 @@
+
+% instance-members
+  GstPad *srcpad;
+% prototypes
+% pad-template
+static GstStaticPadTemplate gst_replace_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/unknown")
+    );
+
+% base-init
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_replace_src_template));
+% instance-init
+
+  replace->srcpad = gst_pad_new_from_static_template (&gst_replace_src_template
+      ,     
+            "src");
+% methods
+% end
+
diff --git a/tools/srcpad.c b/tools/srcpad.c
new file mode 100644
index 000000000..61cbd2132
--- /dev/null
+++ b/tools/srcpad.c
@@ -0,0 +1,274 @@
+
+% instance-members
+  GstPad *srcpad;
+% prototypes
+
+static GstCaps* gst_replace_src_getcaps (GstPad *pad);
+static gboolean gst_replace_src_setcaps (GstPad *pad, GstCaps *caps);
+static gboolean gst_replace_src_acceptcaps (GstPad *pad, GstCaps *caps);
+static void gst_replace_src_fixatecaps (GstPad *pad, GstCaps *caps);
+static gboolean gst_replace_src_activate (GstPad *pad);
+static gboolean gst_replace_src_activatepush (GstPad *pad, gboolean active);
+static gboolean gst_replace_src_activatepull (GstPad *pad, gboolean active);
+static GstPadLinkReturn gst_replace_src_link (GstPad *pad, GstPad *peer);
+static void gst_replace_src_unlink (GstPad *pad);
+static GstFlowReturn gst_replace_src_getrange (GstPad *pad, guint64 offset, guint length,
+    GstBuffer **buffer);
+static gboolean gst_replace_src_event (GstPad *pad, GstEvent *event);
+static gboolean gst_replace_src_query (GstPad *pad, GstQuery *query);
+static GstIterator * gst_replace_src_iterintlink (GstPad *pad);
+
+% pad-template
+static GstStaticPadTemplate gst_replace_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/unknown")
+    );
+
+% base-init
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_replace_src_template));
+% instance-init
+
+  replace->srcpad = gst_pad_new_from_static_template (&gst_replace_src_template
+      ,     
+            "src");
+  gst_pad_set_getcaps_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_getcaps));
+  gst_pad_set_setcaps_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_setcaps));
+  gst_pad_set_acceptcaps_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_acceptcaps));
+  gst_pad_set_fixatecaps_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_fixatecaps));
+  gst_pad_set_activate_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_activate));
+  gst_pad_set_activatepush_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_activatepush));
+  gst_pad_set_activatepull_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_activatepull));
+  gst_pad_set_link_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_link));
+  gst_pad_set_unlink_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_unlink));
+  gst_pad_set_getrange_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_getrange));
+  gst_pad_set_event_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_event));
+  gst_pad_set_query_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_query));
+  gst_pad_set_iterate_internal_links_function (replace->srcpad,
+            GST_DEBUG_FUNCPTR(gst_replace_src_iterintlink));
+  gst_element_add_pad (GST_ELEMENT(replace), replace->srcpad);
+
+
+% methods
+
+static GstCaps*
+gst_replace_src_getcaps (GstPad *pad)
+{
+  GstReplace *replace;
+  GstCaps *caps;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "getcaps");
+
+  caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
+
+  gst_object_unref (replace);
+  return caps;
+}
+
+static gboolean
+gst_replace_src_setcaps (GstPad *pad, GstCaps *caps)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "setcaps");
+
+
+  gst_object_unref (replace);
+  return TRUE;
+}
+
+static gboolean
+gst_replace_src_acceptcaps (GstPad *pad, GstCaps *caps)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "acceptcaps");
+
+
+  gst_object_unref (replace);
+  return TRUE;
+}
+
+static void
+gst_replace_src_fixatecaps (GstPad *pad, GstCaps *caps)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "fixatecaps");
+
+
+  gst_object_unref (replace);
+}
+
+static gboolean
+gst_replace_src_activate (GstPad *pad)
+{
+  GstReplace *replace;
+  gboolean ret;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "activate");
+
+  if (gst_pad_check_pull_range (pad)) {
+    GST_DEBUG_OBJECT (pad, "activating pull");
+    ret = gst_pad_activate_pull (pad, TRUE);
+  } else {
+    GST_DEBUG_OBJECT (pad, "activating push");
+    ret = gst_pad_activate_push (pad, TRUE);
+  }
+
+  gst_object_unref (replace);
+  return ret;
+}
+
+static gboolean
+gst_replace_src_activatepush (GstPad *pad, gboolean active)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "activatepush");
+
+
+  gst_object_unref (replace);
+  return TRUE;
+}
+
+static gboolean
+gst_replace_src_activatepull (GstPad *pad, gboolean active)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "activatepull");
+
+
+  gst_object_unref (replace);
+  return TRUE;
+}
+
+static GstPadLinkReturn
+gst_replace_src_link (GstPad *pad, GstPad *peer)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "link");
+
+
+  gst_object_unref (replace);
+  return GST_PAD_LINK_OK;
+}
+
+static void
+gst_replace_src_unlink (GstPad *pad)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "unlink");
+
+
+  gst_object_unref (replace);
+}
+
+static GstFlowReturn
+gst_replace_src_getrange (GstPad *pad, guint64 offset, guint length,
+    GstBuffer **buffer)
+{
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "getrange");
+
+
+  gst_object_unref (replace);
+  return GST_FLOW_OK;
+}
+
+static gboolean
+gst_replace_src_event (GstPad *pad, GstEvent *event)
+{
+  gboolean res;
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "event");
+
+  switch (GST_EVENT_TYPE (event)) {
+    default:
+      res = gst_pad_event_default (pad, event);
+      break;
+  }
+
+  gst_object_unref (replace);
+  return res;
+}
+
+static gboolean
+gst_replace_src_query (GstPad *pad, GstQuery *query)
+{
+  gboolean res;
+  GstReplace *replace;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "query");
+
+  switch (GST_QUERY_TYPE(query)) {
+    default:
+      res = gst_pad_query_default (pad, query);
+      break;
+  }
+
+  gst_object_unref (replace);
+  return res;
+}
+
+static GstIterator *
+gst_replace_src_iterintlink (GstPad *pad)
+{
+  GstReplace *replace;
+  GstIterator *iter;
+
+  replace = GST_REPLACE (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT(replace, "iterintlink");
+
+  iter = gst_pad_iterate_internal_links_default (pad);
+
+  gst_object_unref (replace);
+  return iter;
+}
+
+% end
+