Add scaletempo plugin, which allows to scale the speed of audio without changing the pitch by handling seeks with a r...

Original commit message from CVS:
Patch by: Rov Juvano <rovjuvano at users dot sourceforge dot net>
* configure.ac:
* docs/plugins/Makefile.am:
* docs/plugins/gst-plugins-bad-plugins-docs.sgml:
* docs/plugins/gst-plugins-bad-plugins-sections.txt:
* docs/plugins/inspect/plugin-scaletempo.xml:
* examples/scaletempo/Makefile.am:
* examples/scaletempo/demo-gui.c: (pop_status_bar),
(status_bar_printf), (demo_gui_seek_bar_format), (update_position),
(demo_gui_seek_bar_change), (demo_gui_do_change_rate),
(demo_gui_do_set_rate), (demo_gui_do_rate_entered),
(demo_gui_do_toggle_advanced), (demo_gui_do_toggle_disabled),
(demo_gui_do_seek), (demo_gui_do_play), (demo_gui_do_pause),
(demo_gui_do_play_pause), (demo_gui_do_open_file),
(demo_gui_do_playlist_prev), (demo_gui_do_playlist_next),
(demo_gui_do_about_dialog), (demo_gui_do_quit),
(demo_gui_request_set_stride), (demo_gui_request_set_overlap),
(demo_gui_request_set_search), (demo_gui_rate_changed),
(demo_gui_playing_started), (demo_gui_playing_paused),
(demo_gui_playing_ended), (demo_gui_player_errored),
(demo_gui_stride_changed), (demo_gui_overlap_changed),
(demo_gui_search_changed), (demo_gui_set_player_func),
(demo_gui_set_playlist_func), (build_gvalue_array),
(create_action), (demo_gui_show_func), (demo_gui_set_player),
(demo_gui_set_playlist), (demo_gui_show), (demo_gui_get_property),
(demo_gui_set_property), (demo_gui_init), (demo_gui_class_init),
(demo_gui_get_type):
* examples/scaletempo/demo-gui.h:
* examples/scaletempo/demo-main.c: (handle_error_message),
(handle_quit), (main):
* examples/scaletempo/demo-player.c: (no_pipeline),
(demo_player_event_listener), (demo_player_state_changed_cb),
(demo_player_eos_cb), (demo_player_build_pipeline), (_set_rate),
(demo_player_scale_rate_func), (demo_player_set_rate_func),
(_set_state_and_wait), (demo_player_load_uri_func),
(demo_player_play_func), (demo_player_pause_func), (_seek_to),
(demo_player_seek_by_func), (demo_player_seek_to_func),
(demo_player_get_position_func), (demo_player_get_duration_func),
(demo_player_scale_rate), (demo_player_set_rate),
(demo_player_load_uri), (demo_player_play), (demo_player_pause),
(demo_player_seek_by), (demo_player_seek_to),
(demo_player_get_position), (demo_player_get_duration),
(demo_player_get_property), (demo_player_set_property),
(demo_player_init), (demo_player_class_init),
(demo_player_get_type):
* examples/scaletempo/demo-player.h:
* gst/scaletempo/Makefile.am:
* gst/scaletempo/gstscaletempo.c: (best_overlap_offset_float),
(best_overlap_offset_s16), (output_overlap_float),
(output_overlap_s16), (fill_queue), (reinit_buffers),
(gst_scaletempo_transform), (gst_scaletempo_transform_size),
(gst_scaletempo_sink_event), (gst_scaletempo_set_caps),
(gst_scaletempo_get_property), (gst_scaletempo_set_property),
(gst_scaletempo_base_init), (gst_scaletempo_class_init),
(gst_scaletempo_init):
* gst/scaletempo/gstscaletempo.h:
* gst/scaletempo/gstscaletempoplugin.c: (plugin_init):
Add scaletempo plugin, which allows to scale the speed of audio without
changing the pitch by handling seeks with a rate!=1.0.
Integrate it into the docs and add the example application for it.
Fixes bug #537700.

16 files changed, 3251 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 8b8d24e8..91008dfa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,68 @@
+2008-08-31  Sebastian Dröge  <sebastian.droege@collabora.co.uk>
+
+	Patch by: Rov Juvano <rovjuvano at users dot sourceforge dot net>
+
+	* configure.ac:
+	* docs/plugins/Makefile.am:
+	* docs/plugins/gst-plugins-bad-plugins-docs.sgml:
+	* docs/plugins/gst-plugins-bad-plugins-sections.txt:
+	* docs/plugins/inspect/plugin-scaletempo.xml:
+	* examples/scaletempo/Makefile.am:
+	* examples/scaletempo/demo-gui.c: (pop_status_bar),
+	(status_bar_printf), (demo_gui_seek_bar_format), (update_position),
+	(demo_gui_seek_bar_change), (demo_gui_do_change_rate),
+	(demo_gui_do_set_rate), (demo_gui_do_rate_entered),
+	(demo_gui_do_toggle_advanced), (demo_gui_do_toggle_disabled),
+	(demo_gui_do_seek), (demo_gui_do_play), (demo_gui_do_pause),
+	(demo_gui_do_play_pause), (demo_gui_do_open_file),
+	(demo_gui_do_playlist_prev), (demo_gui_do_playlist_next),
+	(demo_gui_do_about_dialog), (demo_gui_do_quit),
+	(demo_gui_request_set_stride), (demo_gui_request_set_overlap),
+	(demo_gui_request_set_search), (demo_gui_rate_changed),
+	(demo_gui_playing_started), (demo_gui_playing_paused),
+	(demo_gui_playing_ended), (demo_gui_player_errored),
+	(demo_gui_stride_changed), (demo_gui_overlap_changed),
+	(demo_gui_search_changed), (demo_gui_set_player_func),
+	(demo_gui_set_playlist_func), (build_gvalue_array),
+	(create_action), (demo_gui_show_func), (demo_gui_set_player),
+	(demo_gui_set_playlist), (demo_gui_show), (demo_gui_get_property),
+	(demo_gui_set_property), (demo_gui_init), (demo_gui_class_init),
+	(demo_gui_get_type):
+	* examples/scaletempo/demo-gui.h:
+	* examples/scaletempo/demo-main.c: (handle_error_message),
+	(handle_quit), (main):
+	* examples/scaletempo/demo-player.c: (no_pipeline),
+	(demo_player_event_listener), (demo_player_state_changed_cb),
+	(demo_player_eos_cb), (demo_player_build_pipeline), (_set_rate),
+	(demo_player_scale_rate_func), (demo_player_set_rate_func),
+	(_set_state_and_wait), (demo_player_load_uri_func),
+	(demo_player_play_func), (demo_player_pause_func), (_seek_to),
+	(demo_player_seek_by_func), (demo_player_seek_to_func),
+	(demo_player_get_position_func), (demo_player_get_duration_func),
+	(demo_player_scale_rate), (demo_player_set_rate),
+	(demo_player_load_uri), (demo_player_play), (demo_player_pause),
+	(demo_player_seek_by), (demo_player_seek_to),
+	(demo_player_get_position), (demo_player_get_duration),
+	(demo_player_get_property), (demo_player_set_property),
+	(demo_player_init), (demo_player_class_init),
+	(demo_player_get_type):
+	* examples/scaletempo/demo-player.h:
+	* gst/scaletempo/Makefile.am:
+	* gst/scaletempo/gstscaletempo.c: (best_overlap_offset_float),
+	(best_overlap_offset_s16), (output_overlap_float),
+	(output_overlap_s16), (fill_queue), (reinit_buffers),
+	(gst_scaletempo_transform), (gst_scaletempo_transform_size),
+	(gst_scaletempo_sink_event), (gst_scaletempo_set_caps),
+	(gst_scaletempo_get_property), (gst_scaletempo_set_property),
+	(gst_scaletempo_base_init), (gst_scaletempo_class_init),
+	(gst_scaletempo_init):
+	* gst/scaletempo/gstscaletempo.h:
+	* gst/scaletempo/gstscaletempoplugin.c: (plugin_init):
+	Add scaletempo plugin, which allows to scale the speed of audio without
+	changing the pitch by handling seeks with a rate!=1.0.
+	Integrate it into the docs and add the example application for it.
+	Fixes bug #537700.
+
 2008-08-30  David Schleef  <ds@schleef.org>
 
 	* ext/dirac/gstdiracenc.cc: Fix some memleaks.
diff --git a/configure.ac b/configure.ac
index 99d3a3cf..d2192df2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -266,6 +266,7 @@ AG_GST_CHECK_PLUGIN(pcapparse)
 AG_GST_CHECK_PLUGIN(rawparse)
 AG_GST_CHECK_PLUGIN(real)
 AG_GST_CHECK_PLUGIN(rtpmanager)
+AG_GST_CHECK_PLUGIN(scaletempo)
 AG_GST_CHECK_PLUGIN(sdp)
 AG_GST_CHECK_PLUGIN(selector)
 AG_GST_CHECK_PLUGIN(speed)
@@ -1406,6 +1407,7 @@ gst/nuvdemux/Makefile
 gst/pcapparse/Makefile
 gst/rawparse/Makefile
 gst/rtpmanager/Makefile
+gst/scaletempo/Makefile
 gst/sdp/Makefile
 gst/selector/Makefile
 gst/speed/Makefile
@@ -1437,6 +1439,7 @@ sys/winscreencap/Makefile
 examples/Makefile
 examples/app/Makefile
 examples/directfb/Makefile
+examples/scaletempo/Makefile
 examples/switch/Makefile
 ext/amrwb/Makefile
 ext/alsaspdif/Makefile
diff --git a/docs/plugins/Makefile.am b/docs/plugins/Makefile.am
index 0d474c00..9d13a3ed 100644
--- a/docs/plugins/Makefile.am
+++ b/docs/plugins/Makefile.am
@@ -135,6 +135,7 @@ EXTRA_HFILES = \
 	$(top_srcdir)/gst/rtpmanager/gstrtpptdemux.h \
 	$(top_srcdir)/gst/rtpmanager/gstrtpsession.h \
 	$(top_srcdir)/gst/rtpmanager/gstrtpssrcdemux.h \
+	$(top_srcdir)/gst/scaletempo/gstscaletempo.h \
 	$(top_srcdir)/gst/sdp/gstsdpdemux.h \
 	$(top_srcdir)/gst/selector/gstinputselector.h \
 	$(top_srcdir)/gst/selector/gstoutputselector.h \
diff --git a/docs/plugins/gst-plugins-bad-plugins-docs.sgml b/docs/plugins/gst-plugins-bad-plugins-docs.sgml
index 9167ce2f..9137bf23 100644
--- a/docs/plugins/gst-plugins-bad-plugins-docs.sgml
+++ b/docs/plugins/gst-plugins-bad-plugins-docs.sgml
@@ -46,6 +46,7 @@
     <xi:include href="xml/element-mythtvsrc.xml" />
     <xi:include href="xml/element-nuvdemux.xml" />
     <xi:include href="xml/element-output-selector.xml" />
+    <xi:include href="xml/element-scaletempo.xml" />
     <xi:include href="xml/element-sdlaudiosink.xml" />
     <xi:include href="xml/element-sdlvideosink.xml" />
     <xi:include href="xml/element-sdpdemux.xml" />
@@ -112,6 +113,7 @@
     <xi:include href="xml/plugin-rawparse.xml" />
     <xi:include href="xml/plugin-real.xml" />
     <xi:include href="xml/plugin-rfbsrc.xml" />
+    <xi:include href="xml/plugin-scaletempo.xml" />
     <xi:include href="xml/plugin-sdl.xml" />
     <xi:include href="xml/plugin-sdp.xml" />
     <xi:include href="xml/plugin-selector.xml" />
diff --git a/docs/plugins/gst-plugins-bad-plugins-sections.txt b/docs/plugins/gst-plugins-bad-plugins-sections.txt
index a6d9bedd..0b58c75a 100644
--- a/docs/plugins/gst-plugins-bad-plugins-sections.txt
+++ b/docs/plugins/gst-plugins-bad-plugins-sections.txt
@@ -558,6 +558,20 @@ GST_IS_RTP_SSRC_DEMUX_CLASS
 </SECTION>
 
 <SECTION>
+<FILE>element-scaletempo</FILE>
+<TITLE>scaletempo</TITLE>
+GstScaletempo
+<SUBSECTION Standard>
+GstScaletempoClass
+GST_IS_SCALETEMPO
+GST_IS_SCALETEMPO_CLASS
+GST_SCALETEMPO
+GST_SCALETEMPO_CLASS
+GST_TYPE_SCALETEMPO
+gst_scaletempo_get_type
+</SECTION>
+
+<SECTION>
 <FILE>element-sdlaudiosink</FILE>
 <TITLE>sdlaudiosink</TITLE>
 GstSDLAudioSink
diff --git a/docs/plugins/inspect/plugin-scaletempo.xml b/docs/plugins/inspect/plugin-scaletempo.xml
new file mode 100644
index 00000000..53b1728e
--- /dev/null
+++ b/docs/plugins/inspect/plugin-scaletempo.xml
@@ -0,0 +1,34 @@
+<plugin>
+  <name>scaletempo</name>
+  <description>Scale audio tempo in sync with playback rate</description>
+  <filename>../../gst/scaletempo/.libs/libgstscaletempoplugin.so</filename>
+  <basename>libgstscaletempoplugin.so</basename>
+  <version>0.10.8.1</version>
+  <license>LGPL</license>
+  <source>gst-plugins-bad</source>
+  <package>GStreamer</package>
+  <origin>http://gstreamer.freedesktop.org/</origin>
+  <elements>
+    <element>
+      <name>scaletempo</name>
+      <longname>Scaletempo</longname>
+      <class>Filter/Effect/Rate</class>
+      <description>Sync audio tempo with playback rate</description>
+      <author>Rov Juvano &lt;rovjuvano@users.sourceforge.net&gt;</author>
+      <pads>
+        <caps>
+          <name>sink</name>
+          <direction>sink</direction>
+          <presence>always</presence>
+          <details>audio/x-raw-float, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int)32; audio/x-raw-int, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int)16, depth=(int)16, signed=(boolean)true</details>
+        </caps>
+        <caps>
+          <name>src</name>
+          <direction>source</direction>
+          <presence>always</presence>
+          <details>audio/x-raw-float, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int)32; audio/x-raw-int, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int)16, depth=(int)16, signed=(boolean)true</details>
+        </caps>
+      </pads>
+    </element>
+  </elements>
+</plugin>
\ No newline at end of file
diff --git a/examples/scaletempo/Makefile.am b/examples/scaletempo/Makefile.am
new file mode 100644
index 00000000..5cdf3c7f
--- /dev/null
+++ b/examples/scaletempo/Makefile.am
@@ -0,0 +1,8 @@
+noinst_PROGRAMS = scaletempo-demo
+
+scaletempo_demo_SOURCES = demo-main.c demo-player.c demo-gui.c
+scaletempo_demo_CFLAGS = $(GST_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS) $(GTK_CFLAGS) 
+scaletempo_demo_LDFLAGS = $(GST_LIBS) $(GST_PLUGINS_BASE_LIBS) $(GTK_LIBS) -lgstinterfaces-@GST_MAJORMINOR@
+
+noinst_HEADERS = demo-player.h demo-gui.h
+
diff --git a/examples/scaletempo/demo-gui.c b/examples/scaletempo/demo-gui.c
new file mode 100644
index 00000000..f5a774f8
--- /dev/null
+++ b/examples/scaletempo/demo-gui.c
@@ -0,0 +1,1258 @@
+/* demo-gui.c
+ * Copyright (C) 2008 Rov Juvano <rovjuvano@users.sourceforge.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gtk/gtk.h>
+#include <glib/gprintf.h>
+#include <math.h>
+#include "demo-gui.h"
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "demo-gui"
+
+enum
+{
+  SIGNAL_ERROR,
+  SIGNAL_QUITING,
+  LAST_SIGNAL
+};
+static guint demo_gui_signals[LAST_SIGNAL] = { 0 };
+
+enum
+{
+  PROP_0,
+};
+
+typedef struct _DemoGuiPrivate
+{
+  DemoPlayer *player;
+  GList *uris;
+  GList *now_playing;
+  gboolean is_playing;
+  GtkWidget *window;
+  GtkEntry *rate_entry;
+  GtkStatusbar *status_bar;
+  gint position_updater_id;
+  GtkRange *seek_range;
+  GtkLabel *amount_played;
+  GtkLabel *amount_to_play;
+  GtkAction *play_action;
+  GtkAction *pause_action;
+  GtkAction *open_file;
+  GtkAction *playlist_next;
+} DemoGuiPrivate;
+
+#define DEMO_GUI_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), DEMO_TYPE_GUI, DemoGuiPrivate))
+
+/* forward declarations */
+static GValueArray *build_gvalue_array (guint n_values, ...);
+
+/* Handlers for status bar and seek bar */
+static int
+pop_status_bar (gpointer data)
+{
+  GValueArray *gvalues = (GValueArray *) data;
+  GtkStatusbar *sb =
+      GTK_STATUSBAR (g_value_get_object (g_value_array_get_nth (gvalues, 0)));
+  guint msg_id = g_value_get_uint (g_value_array_get_nth (gvalues, 1));
+
+  gtk_statusbar_remove (sb, 0, msg_id);
+  return FALSE;
+}
+
+#define DEFAULT_STATUS_BAR_TIMEOUT 2
+static void
+status_bar_printf (GtkStatusbar * sb, guint seconds, gchar const *format, ...)
+{
+  va_list args;
+  gchar msg[80];
+  guint msg_id;
+
+  va_start (args, format);
+  g_vsnprintf (msg, 80, format, args);
+  va_end (args);
+
+  msg_id = gtk_statusbar_push (sb, 0, msg);
+  g_timeout_add (2000, pop_status_bar,
+      build_gvalue_array (2, G_TYPE_OBJECT, sb, G_TYPE_UINT, msg_id));
+}
+
+#define PRINTF_TIME_FORMAT "u:%02u:%02u"
+#define PRINTF_TIME_ARGS(t)                       \
+    (t >= 0) ? (guint) ((t) / (60 * 60)) : 99,    \
+    (t >= 0) ? (guint) (((t) / (60)) % 60) : 99,  \
+    (t >= 0) ? (guint) ((t) % 60) : 99
+
+static gchar *
+demo_gui_seek_bar_format (GtkScale * scale, gdouble value, gpointer data)
+{
+  return g_strdup_printf ("%" PRINTF_TIME_FORMAT,
+      PRINTF_TIME_ARGS ((gint64) value));
+}
+
+gboolean
+update_position (gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  gchar pos_str[16], dur_str[16];
+  gint pos = demo_player_get_position (priv->player);
+
+  if (pos > 0) {
+    gint dur = demo_player_get_duration (priv->player);
+
+    g_snprintf (pos_str, 16, "%" PRINTF_TIME_FORMAT, PRINTF_TIME_ARGS (pos));
+    if (dur > 0) {
+      g_snprintf (dur_str, 16, "-%" PRINTF_TIME_FORMAT,
+          PRINTF_TIME_ARGS (dur - pos));
+    } else {
+      dur = pos;
+      g_sprintf (dur_str, "-??:??:??");
+    }
+    if (dur > 0)
+      gtk_range_set_range (GTK_RANGE (priv->seek_range), 0, (gdouble) dur);
+    gtk_range_set_value (GTK_RANGE (priv->seek_range), (gdouble) pos);
+  } else {
+    g_sprintf (pos_str, "??:??:??");
+    g_sprintf (dur_str, "-??:??:??");
+  }
+  gtk_label_set_text (GTK_LABEL (priv->amount_played), pos_str);
+  gtk_label_set_text (GTK_LABEL (priv->amount_to_play), dur_str);
+
+  return priv->is_playing;
+}
+
+
+gboolean
+demo_gui_seek_bar_change (GtkRange * range,
+    GtkScrollType scroll, gdouble value, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  gint new_second = (gint) value;
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Seeking to %i second", new_second);
+  demo_player_seek_to (priv->player, new_second);
+
+  return FALSE;
+}
+
+
+/* Callbacks for actions */
+static void
+demo_gui_do_change_rate (GtkAction * action, gpointer data)
+{
+  GValueArray *gvalues = (GValueArray *) data;
+  DemoGui *gui = g_value_get_object (g_value_array_get_nth (gvalues, 0));
+  gdouble scale_amount =
+      g_value_get_double (g_value_array_get_nth (gvalues, 1));
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Changing rate by %3.2lf", scale_amount);
+
+  demo_player_scale_rate (priv->player, scale_amount);
+}
+
+static void
+demo_gui_do_set_rate (GtkAction * action, gpointer data)
+{
+  GValueArray *gvalues = (GValueArray *) data;
+  DemoGui *gui = g_value_get_object (g_value_array_get_nth (gvalues, 0));
+  gdouble new_rate = g_value_get_double (g_value_array_get_nth (gvalues, 1));
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Setting rate to %3.2lf", new_rate);
+
+  demo_player_set_rate (priv->player, new_rate);
+}
+
+static gboolean
+demo_gui_do_rate_entered (GtkWidget * widget, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  gchar *err = NULL;
+  const gchar *text = gtk_entry_get_text (GTK_ENTRY (widget));
+  double new_rate = g_strtod (text, &err);
+
+  if (*err) {
+    gtk_widget_error_bell (priv->window);
+    status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+        "Invalid rate: %s", text);
+    return TRUE;
+  }
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Setting rate to %3.2lf", new_rate);
+
+  demo_player_set_rate (priv->player, new_rate);
+  return FALSE;
+}
+
+static void
+demo_gui_do_toggle_advanced (GtkAction * action, gpointer data)
+{
+  GValueArray *gvalues = (GValueArray *) data;
+  DemoGui *gui =
+      DEMO_GUI (g_value_get_object (g_value_array_get_nth (gvalues, 0)));
+  GtkWidget *stride_ui =
+      GTK_WIDGET (g_value_get_object (g_value_array_get_nth (gvalues, 1)));
+  GtkWidget *overlap_ui =
+      GTK_WIDGET (g_value_get_object (g_value_array_get_nth (gvalues, 2)));
+  GtkWidget *search_ui =
+      GTK_WIDGET (g_value_get_object (g_value_array_get_nth (gvalues, 3)));
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  gboolean active;
+
+  status_bar_printf (priv->status_bar, 1, "Toggling advanced mode");
+
+  active = gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (action));
+  gtk_widget_set_sensitive (stride_ui, active);
+  gtk_widget_set_sensitive (overlap_ui, active);
+  gtk_widget_set_sensitive (search_ui, active);
+}
+
+static void
+demo_gui_do_toggle_disabled (GtkAction * action, gpointer data)
+{
+  GValueArray *gvalues = (GValueArray *) data;
+  DemoGui *gui =
+      DEMO_GUI (g_value_get_object (g_value_array_get_nth (gvalues, 0)));
+  GtkAction *advanced_action =
+      GTK_ACTION (g_value_get_object (g_value_array_get_nth (gvalues, 1)));
+  GtkWidget *advanced_ui =
+      GTK_WIDGET (g_value_get_object (g_value_array_get_nth (gvalues, 2)));
+
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  gboolean active;
+
+  status_bar_printf (priv->status_bar, 1, "Toggling disabled");
+
+  active = gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (action));
+  gtk_action_set_sensitive (GTK_ACTION (advanced_action), !active);
+  gtk_widget_set_sensitive (GTK_WIDGET (advanced_ui), !active);
+  g_object_set (G_OBJECT (priv->player), "disabled", active, NULL);
+}
+
+static void
+demo_gui_do_seek (GtkAction * action, gpointer data)
+{
+  GValueArray *gvalues = (GValueArray *) data;
+  DemoGui *gui =
+      DEMO_GUI (g_value_get_object (g_value_array_get_nth (gvalues, 0)));
+  gint seconds = g_value_get_int (g_value_array_get_nth (gvalues, 1));
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Requesting seek by %i seconds", seconds);
+
+  demo_player_seek_by (priv->player, seconds);
+}
+
+static void
+demo_gui_do_play (GtkAction * action, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  if (priv->is_playing) {
+    g_signal_emit (gui, demo_gui_signals[SIGNAL_ERROR], 0, "Already playing");
+    return;
+  }
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Requesting playback start");
+
+  demo_player_play (priv->player);
+}
+
+static void
+demo_gui_do_pause (GtkAction * action, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  if (!priv->is_playing) {
+    g_signal_emit (gui, demo_gui_signals[SIGNAL_ERROR], 0, "Already paused");
+    return;
+  }
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Requesting playback pause");
+
+  demo_player_pause (priv->player);
+}
+
+static void
+demo_gui_do_play_pause (GtkAction * action, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Reqesting playback toggle");
+
+  if (priv->is_playing)
+    gtk_action_activate (priv->pause_action);
+  else
+    gtk_action_activate (priv->play_action);
+}
+
+static void
+demo_gui_do_open_file (GtkAction * action, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  GtkWidget *dialog = gtk_file_chooser_dialog_new ("Open File",
+      GTK_WINDOW (priv->window),
+      GTK_FILE_CHOOSER_ACTION_OPEN,
+      GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
+      GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
+      NULL);
+
+  if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT) {
+    char *filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
+    GError *err = NULL;
+
+    g_list_free (priv->uris);
+    priv->uris = NULL;
+    priv->now_playing = NULL;
+    demo_player_load_uri (priv->player, g_filename_to_uri (filename, NULL,
+            &err));
+    g_free (filename);
+  }
+  gtk_widget_destroy (dialog);
+}
+
+static void
+demo_gui_do_playlist_prev (GtkAction * action, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  if (priv->now_playing) {
+    if (priv->now_playing->prev) {
+      status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+          "Playlist previous");
+      priv->now_playing = priv->now_playing->prev;
+    } else {
+      priv->now_playing = NULL;
+      gtk_widget_error_bell (priv->window);
+      status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+          "Beginning of playlist");
+      return;
+    }
+  } else if (priv->uris) {
+    status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+        "Playlist previous: wrap");
+    priv->now_playing = g_list_last (priv->uris);
+  } else {
+    gtk_action_activate (priv->open_file);
+    return;
+  }
+
+  demo_player_load_uri (priv->player, priv->now_playing->data);
+}
+
+static void
+demo_gui_do_playlist_next (GtkAction * action, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  if (priv->now_playing) {
+    if (priv->now_playing->next) {
+      status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+          "Playlist next");
+      priv->now_playing = priv->now_playing->next;
+    } else {
+      priv->now_playing = NULL;
+      gtk_widget_error_bell (priv->window);
+      status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+          "End of playlist");
+      return;
+    }
+  } else if (priv->uris) {
+    status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+        "Playlist next: wrap");
+    priv->now_playing = priv->uris;
+  } else {
+    gtk_action_activate (priv->open_file);
+    return;
+  }
+
+  demo_player_load_uri (priv->player, priv->now_playing->data);
+}
+
+static void
+demo_gui_do_about_dialog (GtkAction * action, gpointer data)
+{
+  static gchar *authors[] =
+      { "Rov Juvano <rovjuvano@users.sourceforge.net>", NULL };
+
+  gtk_show_about_dialog (NULL,
+      "program-name", "gst-scaletempo-demo",
+      "version", VERSION,
+      "authors", authors,
+      "license", "This program is free software: you can redistribute it and/or modify\n\
+it under the terms of the GNU General Public License as published by\n\
+the Free Software Foundation, either version 3 of the License, or\n\
+(at your option) any later version.\n\
+\n\
+This program is distributed in the hope that it will be useful,\n\
+but WITHOUT ANY WARRANTY; without even the implied warranty of\n\
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n\
+GNU General Public License for more details.\n\
+\n\
+You should have received a copy of the GNU General Public License\n\
+along with this program.  If not, see <http://www.gnu.org/licenses/>.", "title", "About gst-scaletempo-demo", NULL);
+}
+
+static void
+demo_gui_do_quit (gpointer source, gpointer data)
+{
+  gtk_main_quit ();
+  g_signal_emit (DEMO_GUI (data), demo_gui_signals[SIGNAL_QUITING], 0, NULL);
+}
+
+static gboolean
+demo_gui_request_set_stride (GtkSpinButton * spinbutton, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  guint new_stride = gtk_spin_button_get_value_as_int (spinbutton);
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Reqesting setting stride to %u ms", new_stride);
+  g_object_set (G_OBJECT (priv->player), "stride", new_stride, NULL);
+  return TRUE;
+}
+
+static gboolean
+demo_gui_request_set_overlap (GtkSpinButton * spinbutton, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  gdouble new_overlap = gtk_spin_button_get_value_as_int (spinbutton);
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Requesting setting overlap to %2.0lf%%", new_overlap);
+  g_object_set (G_OBJECT (priv->player), "overlap", new_overlap / 100.0, NULL);
+  return TRUE;
+}
+
+static gboolean
+demo_gui_request_set_search (GtkSpinButton * spinbutton, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  guint new_search = gtk_spin_button_get_value_as_int (spinbutton);
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Requesting setting search to %u ms", new_search);
+  g_object_set (G_OBJECT (priv->player), "search", new_search, NULL);
+  return TRUE;
+}
+
+
+/* Callbacks from signals */
+static void
+demo_gui_rate_changed (DemoPlayer * player, gdouble new_rate, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  gchar e[6];
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Rate changed to %3.2lf", new_rate);
+
+  g_snprintf (e, 6, "%3.2f", new_rate);
+  gtk_entry_set_text (GTK_ENTRY (priv->rate_entry), e);
+}
+
+static void
+demo_gui_playing_started (DemoPlayer * player, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  priv->is_playing = TRUE;
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Playing started");
+
+  gtk_action_set_sensitive (priv->play_action, FALSE);
+  gtk_action_set_sensitive (priv->pause_action, TRUE);
+  gtk_action_set_visible (priv->play_action, FALSE);
+  gtk_action_set_visible (priv->pause_action, TRUE);
+
+  if (priv->position_updater_id) {
+    g_source_remove (priv->position_updater_id);
+    priv->position_updater_id = 0;
+  }
+  update_position (gui);
+  priv->position_updater_id = g_timeout_add (1000, update_position, gui);
+}
+
+static void
+demo_gui_playing_paused (DemoPlayer * player, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  gtk_action_set_sensitive (priv->play_action, TRUE);
+  gtk_action_set_sensitive (priv->pause_action, FALSE);
+  gtk_action_set_visible (priv->play_action, TRUE);
+  gtk_action_set_visible (priv->pause_action, FALSE);
+
+  priv->is_playing = FALSE;
+
+  if (priv->position_updater_id)
+    g_source_remove (priv->position_updater_id);
+  priv->position_updater_id = 0;
+  update_position (gui);
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Playing paused");
+}
+
+static void
+demo_gui_playing_ended (DemoPlayer * player, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Playing ended");
+  gtk_action_activate (priv->playlist_next);
+}
+
+static void
+demo_gui_player_errored (DemoPlayer * player, const gchar * msg, gpointer data)
+{
+  DemoGui *gui = DEMO_GUI (data);
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  status_bar_printf (priv->status_bar, 5, msg);
+}
+
+static void
+demo_gui_stride_changed (DemoPlayer * player, GParamSpec * pspec, gpointer data)
+{
+  GValueArray *gvalues = (GValueArray *) data;
+  DemoGui *gui =
+      DEMO_GUI (g_value_get_object (g_value_array_get_nth (gvalues, 0)));
+  GtkEntry *entry =
+      GTK_ENTRY (g_value_get_object (g_value_array_get_nth (gvalues, 1)));
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  guint new_stride;
+  gchar e[6];
+
+  g_object_get (G_OBJECT (player), "stride", &new_stride, NULL);
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Stride changed to %u", new_stride);
+
+  snprintf (e, 6, "%u", new_stride);
+  gtk_entry_set_text (entry, e);
+}
+
+static void
+demo_gui_overlap_changed (DemoPlayer * player,
+    GParamSpec * pspec, gpointer data)
+{
+  GValueArray *gvalues = (GValueArray *) data;
+  DemoGui *gui =
+      DEMO_GUI (g_value_get_object (g_value_array_get_nth (gvalues, 0)));
+  GtkEntry *entry =
+      GTK_ENTRY (g_value_get_object (g_value_array_get_nth (gvalues, 1)));
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  gdouble new_overlap;
+  gchar e[6];
+
+  g_object_get (G_OBJECT (player), "overlap", &new_overlap, NULL);
+  new_overlap *= 100;
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Overlap changed to %2.0lf%%", new_overlap);
+
+  snprintf (e, 6, "%2.0f", new_overlap);
+  gtk_entry_set_text (entry, e);
+}
+
+static void
+demo_gui_search_changed (DemoPlayer * player, GParamSpec * pspec, gpointer data)
+{
+  GValueArray *gvalues = (GValueArray *) data;
+  DemoGui *gui =
+      DEMO_GUI (g_value_get_object (g_value_array_get_nth (gvalues, 0)));
+  GtkEntry *entry =
+      GTK_ENTRY (g_value_get_object (g_value_array_get_nth (gvalues, 1)));
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  guint new_search;
+  gchar e[6];
+
+  g_object_get (G_OBJECT (player), "search", &new_search, NULL);
+  status_bar_printf (priv->status_bar, DEFAULT_STATUS_BAR_TIMEOUT,
+      "Search changed to %u", new_search);
+
+  snprintf (e, 6, "%u", new_search);
+  gtk_entry_set_text (entry, e);
+}
+
+
+/* method implementations */
+static void
+demo_gui_set_player_func (DemoGui * gui, DemoPlayer * player)
+{
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+
+  if (priv->player) {
+    g_signal_handlers_disconnect_by_func (G_OBJECT (priv->player),
+        G_CALLBACK (demo_gui_rate_changed), gui);
+    g_signal_handlers_disconnect_by_func (G_OBJECT (priv->player),
+        G_CALLBACK (demo_gui_playing_started), gui);
+    g_signal_handlers_disconnect_by_func (G_OBJECT (priv->player),
+        G_CALLBACK (demo_gui_playing_paused), gui);
+    g_signal_handlers_disconnect_by_func (G_OBJECT (priv->player),
+        G_CALLBACK (demo_gui_playing_ended), gui);
+    g_signal_handlers_disconnect_by_func (G_OBJECT (priv->player),
+        G_CALLBACK (demo_gui_player_errored), gui);
+    g_object_unref (priv->player);
+  }
+  g_object_ref (player);
+  priv->player = player;
+  g_signal_connect (G_OBJECT (priv->player), "error",
+      G_CALLBACK (demo_gui_player_errored), gui);
+  g_signal_connect (G_OBJECT (priv->player), "rate-changed",
+      G_CALLBACK (demo_gui_rate_changed), gui);
+  g_signal_connect (G_OBJECT (priv->player), "playing-started",
+      G_CALLBACK (demo_gui_playing_started), gui);
+  g_signal_connect (G_OBJECT (priv->player), "playing-paused",
+      G_CALLBACK (demo_gui_playing_paused), gui);
+  g_signal_connect (G_OBJECT (priv->player), "playing-ended",
+      G_CALLBACK (demo_gui_playing_ended), gui);
+  priv->is_playing = FALSE;
+}
+
+static void
+demo_gui_set_playlist_func (DemoGui * gui, GList * uris)
+{
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  priv->uris = uris;
+}
+
+typedef struct _ActionEntry
+{
+  GtkAction *action;
+  GtkWidget *button;
+  const gchar *accel;
+  const gchar *name;
+  const gchar *label;
+  const gchar *tooltip;
+  const gchar *stock_id;
+  GtkAccelGroup *accel_group;
+  GtkActionGroup *action_group;
+  GCallback callback;
+  gpointer data;
+} ActionEntry;
+
+static GValueArray *
+build_gvalue_array (guint n_values, ...)
+{
+  va_list args;
+  GValueArray *gva;
+  int i;
+
+  va_start (args, n_values);
+  gva = g_value_array_new (n_values);
+
+  for (i = 0; i < n_values; i++) {
+    GType type = va_arg (args, GType);
+    GValue *gval = g_new0 (GValue, 1);
+    if (type == G_TYPE_INT) {
+      gint value = va_arg (args, gint);
+      g_value_set_int (g_value_init (gval, G_TYPE_INT), value);
+    } else if (type == G_TYPE_UINT) {
+      guint value = va_arg (args, guint);
+      g_value_set_uint (g_value_init (gval, G_TYPE_UINT), value);
+    } else if (type == G_TYPE_DOUBLE) {
+      double value = va_arg (args, double);
+      g_value_set_double (g_value_init (gval, G_TYPE_DOUBLE), value);
+    } else if (type == G_TYPE_OBJECT) {
+      GObject *value = va_arg (args, GObject *);
+      g_value_set_object (g_value_init (gval, G_TYPE_OBJECT), value);
+    } else {
+      g_critical ("build_gvalue_array cannot handle type (%s)",
+          g_type_name (type));
+      va_end (args);
+      return NULL;
+    }
+    g_value_array_append (gva, gval);
+  }
+  va_end (args);
+  return gva;
+}
+
+static void
+create_action (ActionEntry * p)
+{
+  p->action = gtk_action_new (p->name, p->label, p->tooltip, p->stock_id);
+
+  gtk_action_group_add_action_with_accel (p->action_group, p->action, p->accel);
+  gtk_action_set_accel_group (p->action, p->accel_group);
+  gtk_action_connect_accelerator (p->action);
+
+  p->button = gtk_button_new ();
+  gtk_action_connect_proxy (p->action, p->button);
+  gtk_button_set_image (GTK_BUTTON (p->button),
+      gtk_action_create_icon (p->action, GTK_ICON_SIZE_BUTTON));
+  g_signal_connect (G_OBJECT (p->action), "activate", p->callback, p->data);
+}
+
+static void
+demo_gui_show_func (DemoGui * gui)
+{
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  GtkWidget *window;
+  GtkAccelGroup *accel_group;
+  GtkActionGroup *action_group;
+  GtkAction *toggle_advanced, *toggle_disabled;
+  ActionEntry *slower_lg, *slower_sm, *faster_sm, *faster_lg, *normal,
+      *rewind_lg, *rewind_sm, *forward_sm, *forward_lg, *pause, *play,
+      *play_pause, *open_file, *playlist_prev, *playlist_next, *quit, *about;
+  GtkRequisition pause_size;
+  GtkWidget *rate_entry, *rate_label, *toolbox, *stride_ui, *overlap_ui,
+      *search_ui, *propbox, *adv_check, *disabled_check, *media_controls,
+      *amount_played, *amount_to_play, *seek_range, *seek_bar, *status_bar,
+      *file_menu, *file_menu_item, *media_menu_item, *demo_menu,
+      *demo_menu_item, *menu_bar, *toplevel_box, *media_menu;
+  GError *error = NULL;
+
+  gtk_init (NULL, NULL);
+  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+  g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (demo_gui_do_quit),
+      gui);
+
+  accel_group = gtk_accel_group_new ();
+  gtk_window_add_accel_group (GTK_WINDOW (window), accel_group);
+  action_group = gtk_action_group_new ("toolbar");
+
+  slower_lg = &(ActionEntry) {
+    NULL, NULL,
+        "braceleft", "slower-large",
+        "2x Slower", "half playback rate",
+        GTK_STOCK_GO_DOWN, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_change_rate),
+        build_gvalue_array (2, G_TYPE_OBJECT, gui, G_TYPE_DOUBLE, 0.5)
+  };
+  create_action (slower_lg);
+
+  slower_sm = &(ActionEntry) {
+    NULL, NULL,
+        "bracketleft", "slower-small",
+        "_Slower", "decrease playback rate",
+        GTK_STOCK_GO_DOWN, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_change_rate),
+        build_gvalue_array (2, G_TYPE_OBJECT, gui, G_TYPE_DOUBLE, pow (2,
+            -1.0 / 12))
+  };
+  create_action (slower_sm);
+
+  faster_sm = &(ActionEntry) {
+    NULL, NULL,
+        "bracketright", "faster-small",
+        "_Faster", "increase playback rate",
+        GTK_STOCK_GO_UP, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_change_rate),
+        build_gvalue_array (2, G_TYPE_OBJECT, gui, G_TYPE_DOUBLE, pow (2,
+            1.0 / 12))
+  };
+  create_action (faster_sm);
+
+  faster_lg = &(ActionEntry) {
+    NULL, NULL,
+        "braceright", "faster-large",
+        "2X Faster", "double playback rate",
+        GTK_STOCK_GO_UP, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_change_rate),
+        build_gvalue_array (2, G_TYPE_OBJECT, gui, G_TYPE_DOUBLE, 2.0)
+  };
+  create_action (faster_lg);
+
+  normal = &(ActionEntry) {
+    NULL, NULL,
+        "backslash", "normal",
+        "_Normal", "playback normal rate",
+        GTK_STOCK_CLEAR, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_set_rate),
+        build_gvalue_array (2, G_TYPE_OBJECT, gui, G_TYPE_DOUBLE, 1.0)
+  };
+  create_action (normal);
+
+  rewind_lg = &(ActionEntry) {
+    NULL, NULL,
+        "<ctrl><shift>Left", "seek-rewind-large",
+        "Rewind (large)", "seek -30 seconds",
+        GTK_STOCK_MEDIA_REWIND, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_seek),
+        build_gvalue_array (2, G_TYPE_OBJECT, gui, G_TYPE_INT, -30)
+  };
+  create_action (rewind_lg);
+
+  rewind_sm = &(ActionEntry) {
+    NULL, NULL,
+        "<ctrl>Left", "seek-rewind-small",
+        "Rewind", "seek -15 seconds",
+        GTK_STOCK_MEDIA_REWIND, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_seek),
+        build_gvalue_array (2, G_TYPE_OBJECT, gui, G_TYPE_INT, -5)
+  };
+  create_action (rewind_sm);
+
+  forward_sm = &(ActionEntry) {
+    NULL, NULL,
+        "<ctrl>Right", "seek-forward-small",
+        "Forward", "seek +5 seconds",
+        GTK_STOCK_MEDIA_FORWARD, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_seek),
+        build_gvalue_array (2, G_TYPE_OBJECT, gui, G_TYPE_INT, 5)
+  };
+  create_action (forward_sm);
+
+  forward_lg = &(ActionEntry) {
+    NULL, NULL,
+        "<ctrl><shift>Right", "seek-forward-large",
+        "Forward (large)", "seek +30 seconds",
+        GTK_STOCK_MEDIA_FORWARD, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_seek),
+        build_gvalue_array (2, G_TYPE_OBJECT, gui, G_TYPE_INT, 30)
+  };
+  create_action (forward_lg);
+
+  pause = &(ActionEntry) {
+  NULL, NULL,
+        "p", "pause",
+        "Pause", "Pause playback",
+        GTK_STOCK_MEDIA_PAUSE, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_pause), gui};
+  create_action (pause);
+
+  play = &(ActionEntry) {
+  NULL, NULL,
+        "<ctrl>p", "play",
+        "Play", "Start Playback",
+        GTK_STOCK_MEDIA_PLAY, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_play), gui};
+  create_action (play);
+  gtk_widget_size_request (pause->button, &pause_size);
+  gtk_widget_set_size_request (play->button, pause_size.width, -1);
+
+  play_pause = &(ActionEntry) {
+  NULL, NULL,
+        "space", "play-pause",
+        "Play/Pause", "Toggle playback",
+        NULL, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_play_pause), gui};
+  create_action (play_pause);
+
+  open_file = &(ActionEntry) {
+  NULL, NULL,
+        "<ctrl>o", "open-file",
+        "Open File", "Open file for playing",
+        GTK_STOCK_OPEN, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_open_file), gui};
+  create_action (open_file);
+
+  playlist_prev = &(ActionEntry) {
+  NULL, NULL,
+        "less", "playlist-previous",
+        "Previous", "Previous in playlist",
+        GTK_STOCK_MEDIA_PREVIOUS, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_playlist_prev), gui};
+  create_action (playlist_prev);
+
+  playlist_next = &(ActionEntry) {
+  NULL, NULL,
+        "greater", "playlist-next",
+        "Next", "Next in playlist",
+        GTK_STOCK_MEDIA_NEXT, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_playlist_next), gui};
+  create_action (playlist_next);
+
+  quit = &(ActionEntry) {
+  NULL, NULL,
+        "q", "quit",
+        "Quit", "Quit demo",
+        GTK_STOCK_QUIT, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_quit), gui};
+  create_action (quit);
+
+  about = &(ActionEntry) {
+  NULL, NULL,
+        "<ctrl>h", "about",
+        "About", "About gst-scaletemo-demo",
+        GTK_STOCK_ABOUT, accel_group, action_group,
+        G_CALLBACK (demo_gui_do_about_dialog), gui};
+  create_action (about);
+
+  rate_entry = gtk_entry_new ();
+  rate_label = gtk_label_new ("Rate:");
+  gtk_entry_set_max_length (GTK_ENTRY (rate_entry), 5);
+  gtk_entry_set_text (GTK_ENTRY (rate_entry), "1.0");
+  gtk_entry_set_width_chars (GTK_ENTRY (rate_entry), 5);
+  g_signal_connect (G_OBJECT (rate_entry), "activate",
+      G_CALLBACK (demo_gui_do_rate_entered), gui);
+
+  toolbox = gtk_hbox_new (FALSE, 0);
+  gtk_box_pack_start (GTK_BOX (toolbox), slower_sm->button, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (toolbox), rate_label, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (toolbox), rate_entry, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (toolbox), faster_sm->button, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (toolbox), normal->button, FALSE, FALSE, 2);
+
+
+  stride_ui =
+      gtk_spin_button_new (GTK_ADJUSTMENT (gtk_adjustment_new (60, 1, 1000, 1,
+              10, 0)), 0, 0);
+  overlap_ui =
+      gtk_spin_button_new (GTK_ADJUSTMENT (gtk_adjustment_new (20, 0, 100, 5,
+              10, .00001)), 0, 0);
+  search_ui =
+      gtk_spin_button_new (GTK_ADJUSTMENT (gtk_adjustment_new (14, 0, 1000, 1,
+              10, 0)), 0, 0);
+  gtk_widget_set_sensitive (stride_ui, FALSE);
+  gtk_widget_set_sensitive (overlap_ui, FALSE);
+  gtk_widget_set_sensitive (search_ui, FALSE);
+  g_signal_connect (G_OBJECT (stride_ui), "output",
+      G_CALLBACK (demo_gui_request_set_stride), gui);
+  g_signal_connect (G_OBJECT (overlap_ui), "output",
+      G_CALLBACK (demo_gui_request_set_overlap), gui);
+  g_signal_connect (G_OBJECT (search_ui), "output",
+      G_CALLBACK (demo_gui_request_set_search), gui);
+  g_signal_connect (G_OBJECT (priv->player), "notify::stride",
+      G_CALLBACK (demo_gui_stride_changed), build_gvalue_array (2,
+          G_TYPE_OBJECT, gui, G_TYPE_OBJECT, stride_ui));
+  g_signal_connect (G_OBJECT (priv->player), "notify::overlap",
+      G_CALLBACK (demo_gui_overlap_changed), build_gvalue_array (2,
+          G_TYPE_OBJECT, gui, G_TYPE_OBJECT, overlap_ui));
+  g_signal_connect (G_OBJECT (priv->player), "notify::search",
+      G_CALLBACK (demo_gui_search_changed), build_gvalue_array (2,
+          G_TYPE_OBJECT, gui, G_TYPE_OBJECT, search_ui));
+  propbox = gtk_hbox_new (FALSE, 0);
+  adv_check = gtk_check_button_new ();
+  gtk_box_pack_start (GTK_BOX (propbox), gtk_label_new ("stride:"), FALSE,
+      FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (propbox), stride_ui, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (propbox), gtk_label_new ("overlap:"), FALSE,
+      FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (propbox), overlap_ui, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (propbox), gtk_label_new ("search:"), FALSE,
+      FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (propbox), search_ui, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (propbox), adv_check, FALSE, FALSE, 2);
+
+  toggle_advanced =
+      GTK_ACTION (gtk_toggle_action_new ("advanced", "Enable Parameters",
+          "Toggle advanced controls", 0));
+  gtk_action_group_add_action_with_accel (action_group, toggle_advanced,
+      "<ctrl>a");
+  gtk_action_set_accel_group (toggle_advanced, accel_group);
+  gtk_action_connect_accelerator (toggle_advanced);
+  gtk_toggle_action_set_active (GTK_TOGGLE_ACTION (toggle_advanced), FALSE);
+  gtk_action_connect_proxy (toggle_advanced, adv_check);
+  g_signal_connect (G_OBJECT (toggle_advanced), "activate",
+      G_CALLBACK (demo_gui_do_toggle_advanced), build_gvalue_array (4,
+          G_TYPE_OBJECT, gui, G_TYPE_OBJECT, stride_ui, G_TYPE_OBJECT,
+          overlap_ui, G_TYPE_OBJECT, search_ui));
+
+  toggle_disabled =
+      GTK_ACTION (gtk_toggle_action_new ("disabled", "Disable Scaletempo",
+          "Toggle disabling scaletempo", 0));
+  gtk_action_group_add_action_with_accel (action_group, toggle_disabled,
+      "<ctrl>d");
+  gtk_action_set_accel_group (toggle_disabled, accel_group);
+  gtk_action_connect_accelerator (toggle_disabled);
+  gtk_toggle_action_set_active (GTK_TOGGLE_ACTION (toggle_disabled), FALSE);
+  disabled_check = gtk_check_button_new ();
+  gtk_action_connect_proxy (toggle_disabled, disabled_check);
+  g_signal_connect (G_OBJECT (toggle_disabled), "activate",
+      G_CALLBACK (demo_gui_do_toggle_disabled), build_gvalue_array (3,
+          G_TYPE_OBJECT, gui, G_TYPE_OBJECT, toggle_advanced, G_TYPE_OBJECT,
+          propbox));
+  gtk_box_pack_start (GTK_BOX (toolbox), disabled_check, FALSE, FALSE, 2);
+
+
+  media_controls = gtk_hbox_new (FALSE, 0);
+  gtk_box_pack_start (GTK_BOX (media_controls), playlist_prev->button, FALSE,
+      FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (media_controls), rewind_sm->button, FALSE, FALSE,
+      2);
+  gtk_box_pack_start (GTK_BOX (media_controls), play->button, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (media_controls), pause->button, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (media_controls), forward_sm->button, FALSE,
+      FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (media_controls), playlist_next->button, FALSE,
+      FALSE, 2);
+
+  amount_played = gtk_label_new ("?:??:??");
+  amount_to_play = gtk_label_new ("-?:??:??");
+  gtk_label_set_width_chars (GTK_LABEL (amount_played), 8);
+  gtk_label_set_width_chars (GTK_LABEL (amount_to_play), 8);
+  gtk_misc_set_alignment (GTK_MISC (amount_played), 1, 1);
+  gtk_misc_set_alignment (GTK_MISC (amount_to_play), 0, 1);
+  seek_range =
+      gtk_hscale_new (GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 5.0,
+              30.0, 0.00)));
+  gtk_range_set_update_policy (GTK_RANGE (seek_range),
+      GTK_UPDATE_DISCONTINUOUS);
+  seek_bar = gtk_hbox_new (FALSE, 0);
+  gtk_box_pack_start (GTK_BOX (seek_bar), amount_played, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (seek_bar), seek_range, TRUE, TRUE, 2);
+  gtk_box_pack_start (GTK_BOX (seek_bar), amount_to_play, FALSE, FALSE, 2);
+  g_signal_connect (G_OBJECT (seek_range), "format-value",
+      G_CALLBACK (demo_gui_seek_bar_format), gui);
+  g_signal_connect (G_OBJECT (seek_range), "change-value",
+      G_CALLBACK (demo_gui_seek_bar_change), gui);
+
+  status_bar = gtk_statusbar_new ();
+
+  /* Menubar */
+  file_menu = gtk_menu_new ();
+  gtk_menu_set_accel_group (GTK_MENU (file_menu), accel_group);
+  gtk_menu_shell_append (GTK_MENU_SHELL (file_menu),
+      gtk_action_create_menu_item (open_file->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (file_menu),
+      gtk_action_create_menu_item (about->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (file_menu),
+      gtk_action_create_menu_item (quit->action));
+  file_menu_item = gtk_menu_item_new_with_mnemonic ("_File");
+  gtk_menu_item_set_submenu (GTK_MENU_ITEM (file_menu_item), file_menu);
+
+  media_menu = gtk_menu_new ();
+  gtk_menu_set_accel_group (GTK_MENU (media_menu), accel_group);
+  gtk_menu_shell_append (GTK_MENU_SHELL (media_menu),
+      gtk_action_create_menu_item (rewind_lg->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (media_menu),
+      gtk_action_create_menu_item (rewind_sm->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (media_menu),
+      gtk_action_create_menu_item (forward_sm->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (media_menu),
+      gtk_action_create_menu_item (forward_lg->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (media_menu),
+      gtk_action_create_menu_item (play->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (media_menu),
+      gtk_action_create_menu_item (pause->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (media_menu),
+      gtk_action_create_menu_item (play_pause->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (media_menu),
+      gtk_action_create_menu_item (playlist_prev->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (media_menu),
+      gtk_action_create_menu_item (playlist_next->action));
+  media_menu_item = gtk_menu_item_new_with_mnemonic ("_Media");
+  gtk_menu_item_set_submenu (GTK_MENU_ITEM (media_menu_item), media_menu);
+
+  demo_menu = gtk_menu_new ();
+  gtk_menu_set_accel_group (GTK_MENU (demo_menu), accel_group);
+  gtk_menu_shell_append (GTK_MENU_SHELL (demo_menu),
+      gtk_action_create_menu_item (faster_lg->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (demo_menu),
+      gtk_action_create_menu_item (faster_sm->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (demo_menu),
+      gtk_action_create_menu_item (slower_sm->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (demo_menu),
+      gtk_action_create_menu_item (slower_lg->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (demo_menu),
+      gtk_action_create_menu_item (normal->action));
+  gtk_menu_shell_append (GTK_MENU_SHELL (demo_menu),
+      gtk_action_create_menu_item (toggle_disabled));
+  gtk_menu_shell_append (GTK_MENU_SHELL (demo_menu),
+      gtk_action_create_menu_item (toggle_advanced));
+  demo_menu_item = gtk_menu_item_new_with_mnemonic ("_Scaletempo");
+  gtk_menu_item_set_submenu (GTK_MENU_ITEM (demo_menu_item), demo_menu);
+
+  menu_bar = gtk_menu_bar_new ();
+  gtk_menu_shell_append (GTK_MENU_SHELL (menu_bar), file_menu_item);
+  gtk_menu_shell_append (GTK_MENU_SHELL (menu_bar), media_menu_item);
+  gtk_menu_shell_append (GTK_MENU_SHELL (menu_bar), demo_menu_item);
+
+  /* Toplevel Window */
+  gtk_window_set_title (GTK_WINDOW (window), "Scaletempo Demo");
+  toplevel_box = gtk_vbox_new (FALSE, 0);
+  gtk_container_set_border_width (GTK_CONTAINER (toplevel_box), 3);
+  gtk_container_add (GTK_CONTAINER (window), toplevel_box);
+  gtk_box_pack_start (GTK_BOX (toplevel_box), menu_bar, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (toplevel_box), media_controls, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (toplevel_box), toolbox, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (toplevel_box), propbox, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (toplevel_box), seek_bar, FALSE, FALSE, 2);
+  gtk_box_pack_start (GTK_BOX (toplevel_box), status_bar, FALSE, FALSE, 2);
+
+  priv->window = window;
+  priv->rate_entry = GTK_ENTRY (rate_entry);
+  priv->status_bar = GTK_STATUSBAR (status_bar);
+  priv->seek_range = GTK_RANGE (seek_range);
+  priv->amount_played = GTK_LABEL (amount_played);
+  priv->amount_to_play = GTK_LABEL (amount_to_play);
+  priv->play_action = GTK_ACTION (play->action);
+  priv->pause_action = GTK_ACTION (pause->action);
+  priv->open_file = GTK_ACTION (open_file->action);
+  priv->playlist_next = GTK_ACTION (playlist_next->action);
+
+  gtk_action_set_sensitive (priv->pause_action, FALSE);
+  gtk_action_set_visible (priv->pause_action, FALSE);
+
+  gtk_widget_show_all (window);
+  gtk_widget_grab_focus (seek_range);
+  gtk_action_activate (priv->playlist_next);
+  status_bar_printf (GTK_STATUSBAR (status_bar), 5,
+      "Welcome to the Scaletempo demo.");
+
+  if (!g_thread_create ((GThreadFunc) gtk_main, NULL, FALSE, &error)) {
+    g_signal_emit (gui, demo_gui_signals[SIGNAL_ERROR], 0, error->message);
+  }
+}
+
+
+/* Method wrappers */
+void
+demo_gui_set_player (DemoGui * gui, DemoPlayer * player)
+{
+  g_return_if_fail (DEMO_IS_GUI (gui));
+  g_return_if_fail (DEMO_IS_PLAYER (player));
+
+  DEMO_GUI_GET_CLASS (gui)->set_player (gui, player);
+}
+
+void
+demo_gui_set_playlist (DemoGui * gui, GList * uris)
+{
+  g_return_if_fail (DEMO_IS_GUI (gui));
+
+  DEMO_GUI_GET_CLASS (gui)->set_playlist (gui, uris);
+}
+
+void
+demo_gui_show (DemoGui * gui)
+{
+  g_return_if_fail (DEMO_IS_GUI (gui));
+
+  DEMO_GUI_GET_CLASS (gui)->show (gui);
+}
+
+
+
+/* GObject overrides */
+static void
+demo_gui_get_property (GObject * object,
+    guint property_id, GValue * value, GParamSpec * pspec)
+{
+  //DemoGui *gui = DEMO_GUI (object);
+  switch (property_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+  }
+}
+
+static void
+demo_gui_set_property (GObject * object,
+    guint property_id, const GValue * value, GParamSpec * pspec)
+{
+  //DemoGui *gui = DEMO_GUI (object);
+  switch (property_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+  }
+}
+
+
+/* GTypeInfo functions */
+static void
+demo_gui_init (GTypeInstance * instance, gpointer klass)
+{
+  DemoGui *gui = (DemoGui *) instance;
+
+  DemoGuiPrivate *priv = DEMO_GUI_GET_PRIVATE (gui);
+  priv->player = NULL;
+  priv->uris = NULL;
+  priv->now_playing = NULL;
+  priv->is_playing = FALSE;
+  priv->window = NULL;
+  priv->rate_entry = NULL;
+  priv->position_updater_id = 0;
+  priv->seek_range = NULL;
+  priv->amount_played = NULL;
+  priv->amount_to_play = NULL;
+}
+
+static void
+demo_gui_class_init (gpointer klass, gpointer class_data)
+{
+  DemoGuiClass *gui_class = (DemoGuiClass *) klass;
+  GObjectClass *as_object_class = G_OBJECT_CLASS (klass);
+  GType type;
+
+  g_type_class_add_private (klass, sizeof (DemoGuiPrivate));
+
+  /* DemiPlayer */
+  gui_class->set_player = demo_gui_set_player_func;
+  gui_class->set_playlist = demo_gui_set_playlist_func;
+  gui_class->show = demo_gui_show_func;
+
+  /* GObject */
+  as_object_class->get_property = demo_gui_get_property;
+  as_object_class->set_property = demo_gui_set_property;
+
+  /* Properties */
+
+  /* Signals */
+  type = G_TYPE_FROM_CLASS (klass);
+  demo_gui_signals[SIGNAL_ERROR] = g_signal_new ("error", type,
+      G_SIGNAL_RUN_FIRST, 0, NULL, NULL,
+      g_cclosure_marshal_VOID__STRING, G_TYPE_NONE, 1, G_TYPE_STRING);
+
+  demo_gui_signals[SIGNAL_QUITING] = g_signal_new ("quiting", type,
+      G_SIGNAL_RUN_FIRST, 0, NULL, NULL,
+      g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0, NULL);
+}
+
+GType
+demo_gui_get_type (void)
+{
+  static GType type = 0;
+  if (G_UNLIKELY (type == 0)) {
+    static const GTypeInfo info = {
+      sizeof /* Class */ (DemoGuiClass),
+      (GBaseInitFunc) NULL,
+      (GBaseFinalizeFunc) NULL,
+      (GClassInitFunc) demo_gui_class_init,
+      (GClassFinalizeFunc) NULL,
+      (gconstpointer) NULL,     /* class_data */
+      sizeof /* Instance */ (DemoGui),
+      /* n_preallocs */ 0,
+      (GInstanceInitFunc) demo_gui_init,
+      (const GTypeValueTable *) NULL
+    };
+    type = g_type_register_static (G_TYPE_OBJECT, "DemoGui", &info, 0);
+  }
+  return type;
+}
diff --git a/examples/scaletempo/demo-gui.h b/examples/scaletempo/demo-gui.h
new file mode 100644
index 00000000..b447d0d8
--- /dev/null
+++ b/examples/scaletempo/demo-gui.h
@@ -0,0 +1,60 @@
+/* demo-gui.h
+ * Copyright (C) 2008 Rov Juvano <rovjuvano@users.sourceforge.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __DEMO_GUI_H_INCLUDED_
+#define __DEMO_GUI_H_INCLUDED_
+
+#include <glib-object.h>
+#include "demo-player.h"
+
+G_BEGIN_DECLS
+
+#define DEMO_TYPE_GUI          (demo_gui_get_type())
+#define DEMO_GUI(o)            (G_TYPE_CHECK_INSTANCE_CAST((o), DEMO_TYPE_GUI, DemoGui))
+#define DEMO_IS_GUI(o)         (G_TYPE_CHECK_INSTANCE_TYPE((o), DEMO_TYPE_GUI))
+#define DEMO_GUI_TYPE(o)       (G_TYPE_FROM_INSTANCE (o))
+#define DEMO_GUI_TYPE_NAME(o)  (g_type_name (DEMO_GUI_GUI (o)))
+
+#define DEMO_GUI_CLASS(c)      (G_TYPE_CHECK_CLASS_CAST((c),    DEMO_TYPE_GUI, DemoGuiClass))
+#define DEMO_IS_GUI_CLASS(c)   (G_TYPE_CHECK_CLASS_TYPE((c),    DEMO_TYPE_GUI))
+#define DEMO_GUI_GET_CLASS(o)  (G_TYPE_INSTANCE_GET_CLASS ((o), DEMO_TYPE_GUI, DemoGuiClass))
+
+typedef struct _DemoGui DemoGui;
+typedef struct _DemoGuiClass DemoGuiClass;
+
+struct _DemoGui
+{
+  GObject parent;
+};
+
+struct _DemoGuiClass
+{
+  GObjectClass parent;
+  void (*set_player)   (DemoGui   *gui, DemoPlayer   *player);
+  void (*set_playlist) (DemoGui   *gui, GList        *uris);
+  void (*show)         (DemoGui   *gui);
+};
+
+GType demo_gui_get_type (void);
+
+void demo_gui_set_player   (DemoGui   *gui, DemoPlayer   *player);
+void demo_gui_set_playlist (DemoGui   *gui, GList        *uris);
+void demo_gui_show         (DemoGui   *gui);
+
+G_END_DECLS
+
+#endif /* __DEMO_GUI_H_INCLUDED_ */
diff --git a/examples/scaletempo/demo-main.c b/examples/scaletempo/demo-main.c
new file mode 100644
index 00000000..0902d7b2
--- /dev/null
+++ b/examples/scaletempo/demo-main.c
@@ -0,0 +1,95 @@
+/* main.c
+ * Copyright (C) 2008 Rov Juvano <rovjuvano@users.sourceforge.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "demo-player.h"
+#include "demo-gui.h"
+
+extern GOptionGroup *gtk_get_option_group (gboolean);
+extern GOptionGroup *gst_init_get_option_group (void);
+
+static void
+handle_error_message (DemoPlayer * player, const gchar * msg, gpointer data)
+{
+  const gchar *format = (const gchar *) data;
+  g_print (format, msg);
+}
+
+static void
+handle_quit (gpointer source, gpointer data)
+{
+  g_main_loop_quit ((GMainLoop *) data);
+}
+
+
+int
+main (int argc, char *argv[])
+{
+  DemoGui *gui;
+  DemoPlayer *player;
+  gchar **uris = NULL;
+  GOptionContext *ctx;
+  GError *err = NULL;
+  GMainLoop *loop;
+
+  const GOptionEntry entries[] = {
+    {G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &uris,
+        "Special option that collects any remaining arguments for us"},
+    {NULL,}
+  };
+
+  if (!g_thread_supported ())
+    g_thread_init (NULL);
+
+  ctx = g_option_context_new ("uri ...");
+  g_option_context_add_group (ctx, gst_init_get_option_group ());
+  g_option_context_add_group (ctx, gtk_get_option_group (FALSE));
+  g_option_context_add_main_entries (ctx, entries, NULL);
+  if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
+    g_print ("Error initializing: %s\n", err->message);
+    g_error_free (err);
+    return -1;
+  }
+  g_option_context_free (ctx);
+
+  gui = g_object_new (DEMO_TYPE_GUI, NULL);
+  player = g_object_new (DEMO_TYPE_PLAYER, NULL);
+  g_signal_connect (player, "error", G_CALLBACK (handle_error_message),
+      "PLAYER ERROR: %s\n");
+  g_signal_connect (gui, "error", G_CALLBACK (handle_error_message),
+      "GUI ERROR: %s\n");
+  demo_gui_set_player (gui, player);
+
+  loop = g_main_loop_new (NULL, FALSE);
+  g_signal_connect (gui, "quiting", G_CALLBACK (handle_quit), loop);
+
+  if (uris != NULL) {
+    int i, num = g_strv_length (uris);
+    GList *uri_list = NULL;
+    for (i = 0; i < num; i++) {
+      uri_list = g_list_append (uri_list, uris[i]);
+    }
+    demo_gui_set_playlist (gui, uri_list);
+  }
+  demo_gui_show (gui);
+  g_main_loop_run (loop);
+
+  return 0;
+}
diff --git a/examples/scaletempo/demo-player.c b/examples/scaletempo/demo-player.c
new file mode 100644
index 00000000..3ed4b718
--- /dev/null
+++ b/examples/scaletempo/demo-player.c
@@ -0,0 +1,756 @@
+/* demo-player.c
+ * Copyright (C) 2008 Rov Juvano <rovjuvano@users.sourceforge.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "demo-player.h"
+#include "gst/gst.h"
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "demo-player"
+
+enum
+{
+  SIGNAL_ERROR,
+  SIGNAL_RATE_CHANGE,
+  SIGNAL_PLAYING_STARTED,
+  SIGNAL_PLAYING_PAUSED,
+  SIGNAL_PLAYING_ENDED,
+  LAST_SIGNAL
+};
+static guint demo_player_signals[LAST_SIGNAL] = { 0 };
+
+enum
+{
+  PROP_0,
+  PROP_RATE,
+  PROP_STRIDE,
+  PROP_OVERLAP,
+  PROP_SEARCH,
+  PROP_DISABLED
+};
+
+typedef struct _DemoPlayerPrivate
+{
+  gdouble rate;
+  GstElement *scaletempo;
+  GstElement *pipeline;
+  gboolean is_disabled;
+  GstElement *scaletempo_line;
+  GstElement *scalerate_line;
+  gboolean ignore_state_change;
+} DemoPlayerPrivate;
+
+#define DEMO_PLAYER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), DEMO_TYPE_PLAYER, DemoPlayerPrivate))
+
+
+static gboolean
+no_pipeline (DemoPlayer * player)
+{
+  DemoPlayerPrivate *priv = DEMO_PLAYER_GET_PRIVATE (player);
+  if (!priv->pipeline) {
+    g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0,
+        "No media loaded");
+    return TRUE;
+  }
+  return FALSE;
+}
+
+static gboolean
+demo_player_event_listener (GstElement * host, GstEvent * event, gpointer data)
+{
+  DemoPlayer *player = DEMO_PLAYER (data);
+  DemoPlayerPrivate *priv = DEMO_PLAYER_GET_PRIVATE (player);
+
+  if (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT) {
+    gdouble rate, applied_rate;
+    gdouble new_rate;
+
+    gst_event_parse_new_segment_full (event, NULL, &rate, &applied_rate, NULL,
+        NULL, NULL, NULL);
+    new_rate = rate * applied_rate;
+    if (priv->rate != new_rate) {
+      priv->rate = new_rate;
+      g_signal_emit (player, demo_player_signals[SIGNAL_RATE_CHANGE], 0,
+          new_rate);
+    }
+  }
+
+  return TRUE;
+}
+
+static void
+demo_player_state_changed_cb (GstBus * bus, GstMessage * message, gpointer data)
+{
+  DemoPlayer *player = DEMO_PLAYER (data);
+  DemoPlayerPrivate *priv = DEMO_PLAYER_GET_PRIVATE (player);
+  GstState old, new, pending;
+
+  if (GST_ELEMENT (GST_MESSAGE_SRC (message)) != priv->pipeline)
+    return;
+
+  gst_message_parse_state_changed (message, &old, &new, &pending);
+
+  if (pending == GST_STATE_VOID_PENDING) {
+    if (priv->ignore_state_change) {
+      priv->ignore_state_change = FALSE;
+    } else if (new == GST_STATE_PAUSED) {
+      g_signal_emit (player, demo_player_signals[SIGNAL_PLAYING_PAUSED], 0);
+    } else if (new == GST_STATE_PLAYING) {
+      g_signal_emit (player, demo_player_signals[SIGNAL_PLAYING_STARTED], 0);
+    }
+  }
+}
+
+static void
+demo_player_eos_cb (GstBus * bus, GstMessage * message, gpointer data)
+{
+  DemoPlayer *player = DEMO_PLAYER (data);
+  g_signal_emit (player, demo_player_signals[SIGNAL_PLAYING_ENDED], 0);
+}
+
+#define MAKE_ELEMENT(line, var, type, name)                         \
+  if ( !(var = gst_element_factory_make (type, name) ) ) {          \
+    g_print ("element could not be created: %s/%s\n", type, name);  \
+    return;                                                         \
+  }                                                                 \
+  if (line) gst_bin_add (GST_BIN (line), var);
+
+#define LINK_ELEMENTS(src, sink)                            \
+  if (!gst_element_link (src, sink)) {                      \
+    g_warning ("Failed to link elements: %s -> %s",         \
+        GST_ELEMENT_NAME (src), GST_ELEMENT_NAME (sink) );  \
+    return;                                                 \
+  }
+
+static void
+demo_player_build_pipeline (DemoPlayer * player)
+{
+  DemoPlayerPrivate *priv = DEMO_PLAYER_GET_PRIVATE (player);
+  GstElement *filter, *playbin, *vsink, *audioline, *format, *resample, *asink;
+  GstPlugin *gconf;
+  GstBus *bus;
+  gboolean has_gconf;
+  const gchar *audiosink_name;
+  GstPad *ghostpad;
+
+  priv->pipeline = NULL;
+  if (!priv->scaletempo) {
+    return;
+  }
+
+  filter = priv->scaletempo;
+
+  MAKE_ELEMENT (NULL, playbin, "playbin", "playbin");
+
+  gconf = gst_default_registry_find_plugin ("gconfelements");
+  has_gconf = (gconf != NULL);
+  gst_object_unref (gconf);
+
+  if (has_gconf) {
+    MAKE_ELEMENT (NULL, vsink, "gconfvideosink", "vsink");
+    g_object_set (G_OBJECT (playbin), "video_sink", vsink, NULL);
+  }
+  audiosink_name = has_gconf ? "gconfaudiosink" : "autoaudiosink";
+
+  audioline = gst_bin_new ("audioline");
+  gst_bin_add (GST_BIN (audioline), filter);
+  MAKE_ELEMENT (audioline, format, "audioconvert", "format");
+  MAKE_ELEMENT (audioline, resample, "audioresample", "resample");
+  MAKE_ELEMENT (audioline, asink, audiosink_name, "audio_sink");
+  LINK_ELEMENTS (filter, format);
+  LINK_ELEMENTS (format, resample);
+  LINK_ELEMENTS (resample, asink);
+
+  gst_pad_add_event_probe (gst_element_get_static_pad (asink, "sink"),
+      G_CALLBACK (demo_player_event_listener), player);
+
+  ghostpad = gst_element_get_static_pad (filter, "sink");
+  gst_element_add_pad (audioline, gst_ghost_pad_new ("sink", ghostpad));
+  gst_object_unref (ghostpad);
+  g_object_set (G_OBJECT (playbin), "audio-sink", audioline, NULL);
+
+  bus = gst_pipeline_get_bus (GST_PIPELINE (playbin));
+  gst_bus_add_signal_watch (bus);
+  g_signal_connect (bus, "message::state-changed",
+      G_CALLBACK (demo_player_state_changed_cb), player);
+  g_signal_connect (bus, "message::eos", G_CALLBACK (demo_player_eos_cb),
+      player);
+  gst_object_unref (bus);
+
+  priv->scaletempo = filter;
+  priv->pipeline = playbin;
+
+  priv->scaletempo_line = audioline;
+  MAKE_ELEMENT (NULL, priv->scalerate_line, "gconfaudiosink",
+      "scaling_audio_sink");
+  gst_pad_add_event_probe (gst_element_get_static_pad (priv->scalerate_line,
+          "sink"), G_CALLBACK (demo_player_event_listener), player);
+  g_object_ref (priv->scaletempo_line);
+  g_object_ref (priv->scalerate_line);
+}
+
+
+/* method implementations */
+static void
+_set_rate (DemoPlayer * player, gdouble new_rate, gint second)
+{
+  DemoPlayerPrivate *priv;
+  gint64 pos;
+  GstSeekType seek_type;
+
+
+  if (new_rate == 0) {
+    g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0,
+        "Cannot set playback to zero.  Pausing instead.");
+    demo_player_pause (player);
+  }
+
+  priv = DEMO_PLAYER_GET_PRIVATE (player);
+
+  if (second < 0) {
+    GstFormat fmt = GST_FORMAT_TIME;
+    seek_type = GST_SEEK_TYPE_SET;
+    if (!gst_element_query_position (priv->pipeline, &fmt, &pos)) {
+      // This should be the default but too many upstream elements seek anyway
+      pos = GST_CLOCK_TIME_NONE;
+      seek_type = GST_SEEK_TYPE_NONE;
+    }
+  } else {
+    seek_type = GST_SEEK_TYPE_SET;
+    pos = second * GST_SECOND;
+  }
+
+  if (!gst_element_seek (priv->pipeline, new_rate,
+          GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE,
+          seek_type, pos, GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE)) {
+    g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0,
+        "Unable to change playback rate");
+  } else {
+    priv->ignore_state_change = TRUE;
+  }
+}
+
+static void
+demo_player_scale_rate_func (DemoPlayer * player, gdouble scale)
+{
+  DemoPlayerPrivate *priv;
+  if (no_pipeline (player))
+    return;
+
+  priv = DEMO_PLAYER_GET_PRIVATE (player);
+
+  if (scale != 1.0) {
+    g_message ("Scaling Rate by: %3.2f", scale);
+    _set_rate (player, priv->rate * scale, -1);
+  }
+}
+
+static void
+demo_player_set_rate_func (DemoPlayer * player, gdouble new_rate)
+{
+  DemoPlayerPrivate *priv;
+
+  if (no_pipeline (player))
+    return;
+
+  priv = DEMO_PLAYER_GET_PRIVATE (player);
+
+  if (priv->rate != new_rate) {
+    g_message ("Setting Rate to: %3.2f", new_rate);
+    _set_rate (player, new_rate, -1);
+  }
+}
+
+static gboolean
+_set_state_and_wait (DemoPlayer * player,
+    GstState new_state, GstClockTime timeout, const gchar * error_msg)
+{
+  DemoPlayerPrivate *priv = DEMO_PLAYER_GET_PRIVATE (player);
+  GstStateChangeReturn ret = gst_element_set_state (priv->pipeline, new_state);
+  if (ret == GST_STATE_CHANGE_ASYNC) {
+    ret = gst_element_get_state (priv->pipeline, NULL, NULL, timeout);
+  }
+  if (ret != GST_STATE_CHANGE_SUCCESS) {
+    g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0, error_msg);
+    return FALSE;
+  }
+  return TRUE;
+}
+
+static void
+demo_player_load_uri_func (DemoPlayer * player, gchar * uri)
+{
+  DemoPlayerPrivate *priv = DEMO_PLAYER_GET_PRIVATE (player);
+  GstState end_state;
+  gdouble rate;
+
+  if (!priv->pipeline) {
+    demo_player_build_pipeline (player);
+    if (!priv->pipeline) {
+      g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0,
+          "Could not build player");
+      return;
+    }
+  }
+  if (!g_str_has_prefix (uri, "file:///")) {
+    GError *err = NULL;
+    if (g_path_is_absolute (uri)) {
+      uri = g_filename_to_uri (uri, NULL, &err);
+    } else {
+      gchar *curdir = g_get_current_dir ();
+      gchar *absolute_path = g_strconcat (curdir, G_DIR_SEPARATOR_S, uri, NULL);
+      uri = g_filename_to_uri (absolute_path, NULL, &err);
+      g_free (absolute_path);
+      g_free (curdir);
+    }
+    if (err) {
+      gchar *msg = g_strconcat ("Could not load uri: ", err->message, NULL);
+      g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0, msg);
+      return;
+    }
+  }
+
+  g_message ("Loading URI: %s", uri);
+
+  end_state =
+      (GST_STATE (priv->pipeline) ==
+      GST_STATE_PLAYING) ? GST_STATE_PLAYING : GST_STATE_PAUSED;
+  if (!_set_state_and_wait (player, GST_STATE_NULL, 10 * GST_SECOND,
+          "Unable to load uri"))
+    return;
+
+  g_object_set (G_OBJECT (priv->pipeline), "uri", uri, NULL);
+
+  rate = priv->rate;
+  if (rate && rate != 1.0) {
+    _set_state_and_wait (player, GST_STATE_PAUSED, 10 * GST_SECOND,
+        "Unable to keep playback rate");
+    _set_rate (player, rate, -1);
+  }
+
+  gst_element_set_state (priv->pipeline, end_state);
+}
+
+static void
+demo_player_play_func (DemoPlayer * player)
+{
+  DemoPlayerPrivate *priv;
+  GstStateChangeReturn ret;
+
+  if (no_pipeline (player))
+    return;
+
+  priv = DEMO_PLAYER_GET_PRIVATE (player);
+
+  if (GST_STATE (priv->pipeline) == GST_STATE_PLAYING) {
+    g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0,
+        "Already playing");
+    return;
+  }
+
+  g_debug ("Starting to Play");
+  ret = gst_element_set_state (priv->pipeline, GST_STATE_PLAYING);
+  if (ret == GST_STATE_CHANGE_FAILURE) {
+    g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0,
+        "Unable to start playback");
+    return;
+  }
+}
+
+static void
+demo_player_pause_func (DemoPlayer * player)
+{
+  DemoPlayerPrivate *priv;
+  GstStateChangeReturn ret;
+
+  if (no_pipeline (player))
+    return;
+
+  priv = DEMO_PLAYER_GET_PRIVATE (player);
+
+  if (GST_STATE (priv->pipeline) == GST_STATE_PAUSED) {
+    g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0,
+        "Already paused");
+    return;
+  }
+
+  g_debug ("Starting to Pause");
+  ret = gst_element_set_state (priv->pipeline, GST_STATE_PAUSED);
+  if (ret == GST_STATE_CHANGE_FAILURE) {
+    g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0,
+        "Unable to pause playback");
+    return;
+  }
+}
+
+static void
+_seek_to (DemoPlayer * player, gint new_second)
+{
+  DemoPlayerPrivate *priv = DEMO_PLAYER_GET_PRIVATE (player);
+  if (!gst_element_seek (priv->pipeline, priv->rate,
+          GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
+          GST_SEEK_TYPE_SET, new_second * GST_SECOND,
+          GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE)) {
+    g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0, "Seek failed");
+    return;
+  }
+
+  priv->ignore_state_change = TRUE;
+}
+
+static void
+demo_player_seek_by_func (DemoPlayer * player, gint seconds)
+{
+  gint pos;
+
+  if (no_pipeline (player))
+    return;
+
+  g_debug ("Seeking by: %i", seconds);
+
+  pos = demo_player_get_position (player);
+  if (pos < 0) {
+    g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0,
+        "Seek-by failed: could not determine position");
+    return;
+  }
+
+  _seek_to (player, MAX (0, pos + seconds));
+}
+
+static void
+demo_player_seek_to_func (DemoPlayer * player, gint second)
+{
+  gint new_second;
+
+  if (no_pipeline (player))
+    return;
+
+  g_debug ("Seeking to: %i", second);
+
+  if (second < 0) {
+    gint dur = demo_player_get_duration (player);
+    if (dur < 0) {
+      g_signal_emit (player, demo_player_signals[SIGNAL_ERROR], 0,
+          "Seek-to failed: could not determine duration");
+      return;
+    }
+    new_second = MAX (0, dur + second);
+  } else {
+    new_second = second;
+  }
+
+  _seek_to (player, new_second);
+}
+
+static gint
+demo_player_get_position_func (DemoPlayer * player)
+{
+  DemoPlayerPrivate *priv = DEMO_PLAYER_GET_PRIVATE (player);
+  gint64 pos;
+  GstFormat fmt = GST_FORMAT_TIME;
+
+  if (!priv->pipeline)
+    return -1;
+
+  if (!gst_element_query_position (priv->pipeline, &fmt, &pos) || pos < 0) {
+    return -1;
+  }
+
+  return (gint) (pos / GST_SECOND);
+}
+
+static gint
+demo_player_get_duration_func (DemoPlayer * player)
+{
+  DemoPlayerPrivate *priv = DEMO_PLAYER_GET_PRIVATE (player);
+  gint64 dur;
+  GstFormat fmt = GST_FORMAT_TIME;
+
+  if (!priv->pipeline)
+    return -1;
+
+  if (!gst_element_query_duration (priv->pipeline, &fmt, &dur) || dur < 0) {
+    return -1;
+  }
+
+  return (gint) (dur / GST_SECOND);
+}
+
+
+/* Method wrappers */
+void
+demo_player_scale_rate (DemoPlayer * player, gdouble scale)
+{
+  g_return_if_fail (DEMO_IS_PLAYER (player));
+
+  DEMO_PLAYER_GET_CLASS (player)->scale_rate (player, scale);
+}
+
+void
+demo_player_set_rate (DemoPlayer * player, gdouble new_rate)
+{
+  g_return_if_fail (DEMO_IS_PLAYER (player));
+
+  DEMO_PLAYER_GET_CLASS (player)->set_rate (player, new_rate);
+}
+
+void
+demo_player_load_uri (DemoPlayer * player, gchar * uri)
+{
+  g_return_if_fail (DEMO_IS_PLAYER (player));
+
+  DEMO_PLAYER_GET_CLASS (player)->load_uri (player, uri);
+}
+
+void
+demo_player_play (DemoPlayer * player)
+{
+  g_return_if_fail (DEMO_IS_PLAYER (player));
+
+  DEMO_PLAYER_GET_CLASS (player)->play (player);
+}
+
+void
+demo_player_pause (DemoPlayer * player)
+{
+  g_return_if_fail (DEMO_IS_PLAYER (player));
+
+  DEMO_PLAYER_GET_CLASS (player)->pause (player);
+}
+
+void
+demo_player_seek_by (DemoPlayer * player, gint seconds)
+{
+  g_return_if_fail (DEMO_IS_PLAYER (player));
+
+  DEMO_PLAYER_GET_CLASS (player)->seek_by (player, seconds);
+}
+
+void
+demo_player_seek_to (DemoPlayer * player, gint second)
+{
+  g_return_if_fail (DEMO_IS_PLAYER (player));
+
+  DEMO_PLAYER_GET_CLASS (player)->seek_to (player, second);
+}
+
+gint
+demo_player_get_position (DemoPlayer * player)
+{
+  g_return_val_if_fail (DEMO_IS_PLAYER (player), -1);
+
+  return DEMO_PLAYER_GET_CLASS (player)->get_position (player);
+}
+
+gint
+demo_player_get_duration (DemoPlayer * player)
+{
+  g_return_val_if_fail (DEMO_IS_PLAYER (player), -1);
+
+  return DEMO_PLAYER_GET_CLASS (player)->get_duration (player);
+}
+
+/* GObject overrides */
+static void
+demo_player_get_property (GObject * object,
+    guint property_id, GValue * value, GParamSpec * pspec)
+{
+  DemoPlayer *player = DEMO_PLAYER (object);
+  DemoPlayerPrivate *priv = DEMO_PLAYER_GET_PRIVATE (player);
+  switch (property_id) {
+    case PROP_RATE:
+      g_value_set_double (value, priv->rate);
+      break;
+    case PROP_STRIDE:
+      g_object_get_property (G_OBJECT (priv->scaletempo), "stride", value);
+      break;
+    case PROP_OVERLAP:
+      g_object_get_property (G_OBJECT (priv->scaletempo), "overlap", value);
+      break;
+    case PROP_SEARCH:
+      g_object_get_property (G_OBJECT (priv->scaletempo), "search", value);
+      break;
+    case PROP_DISABLED:
+      g_value_set_boolean (value, priv->is_disabled);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+  }
+}
+
+static void
+demo_player_set_property (GObject * object,
+    guint property_id, const GValue * value, GParamSpec * pspec)
+{
+  DemoPlayer *player = DEMO_PLAYER (object);
+  DemoPlayerPrivate *priv = DEMO_PLAYER_GET_PRIVATE (player);
+  switch (property_id) {
+    case PROP_STRIDE:
+      g_object_set_property (G_OBJECT (priv->scaletempo), "stride", value);
+      break;
+    case PROP_OVERLAP:
+      g_object_set_property (G_OBJECT (priv->scaletempo), "overlap", value);
+      break;
+    case PROP_SEARCH:
+      g_object_set_property (G_OBJECT (priv->scaletempo), "search", value);
+      break;
+    case PROP_DISABLED:{
+      gdouble rate = priv->rate;
+      gint pos = demo_player_get_position (player);
+      GstState end_state;
+      GstElement *new_sink;
+
+      priv->is_disabled = g_value_get_boolean (value);
+
+      g_debug ("Scaletempo: %s", priv->is_disabled ? "disabled" : "enabled");
+
+      end_state =
+          (GST_STATE (priv->pipeline) ==
+          GST_STATE_PLAYING) ? GST_STATE_PLAYING : GST_STATE_PAUSED;
+      if (!_set_state_and_wait (player, GST_STATE_NULL, 10 * GST_SECOND,
+              "Unable to disable"))
+        break;
+
+      new_sink =
+          (priv->is_disabled) ? priv->scalerate_line : priv->scaletempo_line;
+      g_object_set (G_OBJECT (priv->pipeline), "audio-sink", new_sink, NULL);
+
+      if (pos > 0 || (rate && rate != 1.0)) {
+        _set_state_and_wait (player, GST_STATE_PAUSED, 10 * GST_SECOND,
+            "Unable to keep playback position and rate");
+        _set_rate (player, rate, pos);
+      }
+
+      gst_element_set_state (priv->pipeline, end_state);
+      break;
+    }
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+  }
+}
+
+
+/* GTypeInfo functions */
+static void
+demo_player_init (GTypeInstance * instance, gpointer klass)
+{
+  DemoPlayer *player = (DemoPlayer *) instance;
+  DemoPlayerPrivate *priv = DEMO_PLAYER_GET_PRIVATE (player);
+  priv->scaletempo = gst_element_factory_make ("scaletempo", "scaletempo");
+  if (!priv->scaletempo) {
+    g_error ("Unable to make scaletempo element.");
+  }
+  priv->rate = 1.0;
+  priv->pipeline = NULL;
+  priv->ignore_state_change = FALSE;
+  priv->is_disabled = FALSE;
+}
+
+static void
+demo_player_class_init (gpointer klass, gpointer class_data)
+{
+  DemoPlayerClass *player_class = (DemoPlayerClass *) klass;
+  GObjectClass *as_object_class = G_OBJECT_CLASS (klass);
+  GType type;
+
+  g_type_class_add_private (klass, sizeof (DemoPlayerPrivate));
+
+  /* DemoPlayer */
+  player_class->scale_rate = demo_player_scale_rate_func;
+  player_class->set_rate = demo_player_set_rate_func;
+  player_class->load_uri = demo_player_load_uri_func;
+  player_class->play = demo_player_play_func;
+  player_class->pause = demo_player_pause_func;
+  player_class->seek_by = demo_player_seek_by_func;
+  player_class->seek_to = demo_player_seek_to_func;
+  player_class->get_position = demo_player_get_position_func;
+  player_class->get_duration = demo_player_get_duration_func;
+
+  /* GObject */
+  as_object_class->get_property = demo_player_get_property;
+  as_object_class->set_property = demo_player_set_property;
+
+  /* Properties */
+  g_object_class_install_property (as_object_class, PROP_RATE,
+      g_param_spec_double ("rate", "Rate", "Current playback rate",
+          -128, 128, 1.0, G_PARAM_READABLE));
+
+  g_object_class_install_property (as_object_class, PROP_STRIDE,
+      g_param_spec_uint ("stride", "Stride Length",
+          "Length in milliseconds to output each stride", 1, 10000, 60,
+          G_PARAM_READWRITE));
+
+  g_object_class_install_property (as_object_class, PROP_OVERLAP,
+      g_param_spec_double ("overlap", "Overlap Length",
+          "Percentage of stride to overlap", 0, 1, .2, G_PARAM_READWRITE));
+
+  g_object_class_install_property (as_object_class, PROP_SEARCH,
+      g_param_spec_uint ("search", "Search Length",
+          "Length in milliseconds to search for best overlap position", 0,
+          10000, 14, G_PARAM_READWRITE));
+
+  g_object_class_install_property (as_object_class, PROP_DISABLED,
+      g_param_spec_boolean ("disabled", "disable scaletempo",
+          "Disable scaletempo and scale bothe tempo and pitch", FALSE,
+          G_PARAM_READWRITE));
+
+  /* Signals */
+  type = G_TYPE_FROM_CLASS (klass);
+  demo_player_signals[SIGNAL_ERROR] = g_signal_new ("error", type,
+      G_SIGNAL_RUN_FIRST, 0, NULL, NULL,
+      g_cclosure_marshal_VOID__STRING, G_TYPE_NONE, 1, G_TYPE_STRING);
+
+  demo_player_signals[SIGNAL_RATE_CHANGE] = g_signal_new ("rate-changed", type,
+      G_SIGNAL_RUN_FIRST, 0, NULL, NULL,
+      g_cclosure_marshal_VOID__DOUBLE, G_TYPE_NONE, 1, G_TYPE_DOUBLE);
+
+  demo_player_signals[SIGNAL_PLAYING_STARTED] =
+      g_signal_new ("playing-started", type, G_SIGNAL_RUN_FIRST, 0, NULL, NULL,
+      g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+
+  demo_player_signals[SIGNAL_PLAYING_PAUSED] =
+      g_signal_new ("playing-paused", type, G_SIGNAL_RUN_FIRST, 0, NULL, NULL,
+      g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+
+  demo_player_signals[SIGNAL_PLAYING_ENDED] =
+      g_signal_new ("playing-ended", type, G_SIGNAL_RUN_FIRST, 0, NULL, NULL,
+      g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+}
+
+GType
+demo_player_get_type (void)
+{
+  static GType type = 0;
+  if (G_UNLIKELY (type == 0)) {
+    static const GTypeInfo info = {
+      sizeof /* Class */ (DemoPlayerClass),
+      (GBaseInitFunc) NULL,
+      (GBaseFinalizeFunc) NULL,
+      (GClassInitFunc) demo_player_class_init,
+      (GClassFinalizeFunc) NULL,
+      (gconstpointer) NULL,     /* class_data */
+      sizeof /* Instance */ (DemoPlayer),
+      /* n_preallocs */ 0,
+      (GInstanceInitFunc) demo_player_init,
+      (const GTypeValueTable *) NULL
+    };
+    type = g_type_register_static (G_TYPE_OBJECT, "DemoPlayer", &info, 0);
+  }
+  return type;
+}
diff --git a/examples/scaletempo/demo-player.h b/examples/scaletempo/demo-player.h
new file mode 100644
index 00000000..ff521fc7
--- /dev/null
+++ b/examples/scaletempo/demo-player.h
@@ -0,0 +1,71 @@
+/* gui.h
+ * Copyright (C) 2008 Rov Juvano <rovjuvano@users.sourceforge.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __DEMO_PLAYER_H_INCLUDED_
+#define __DEMO_PLAYER_H_INCLUDED_
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define DEMO_TYPE_PLAYER          (demo_player_get_type())
+#define DEMO_PLAYER(o)            (G_TYPE_CHECK_INSTANCE_CAST((o), DEMO_TYPE_PLAYER, DemoPlayer))
+#define DEMO_IS_PLAYER(o)         (G_TYPE_CHECK_INSTANCE_TYPE((o), DEMO_TYPE_PLAYER))
+#define DEMO_PLAYER_TYPE(o)       (G_TYPE_FROM_INSTANCE (o))
+#define DEMO_PLAYER_TYPE_NAME(o)  (g_type_name (DEMO_PLAYER_TYPE (o)))
+
+#define DEMO_PLAYER_CLASS(c)      (G_TYPE_CHECK_CLASS_CAST((c),    DEMO_TYPE_PLAYER, DemoPlayerClass))
+#define DEMO_IS_PLAYER_CLASS(c)   (G_TYPE_CHECK_CLASS_TYPE((c),    DEMO_TYPE_PLAYER))
+#define DEMO_PLAYER_GET_CLASS(o)  (G_TYPE_INSTANCE_GET_CLASS ((o), DEMO_TYPE_PLAYER, DemoPlayerClass))
+
+typedef struct _DemoPlayer DemoPlayer;
+typedef struct _DemoPlayerClass DemoPlayerClass;
+
+struct _DemoPlayer
+{
+  GObject parent;
+};
+
+struct _DemoPlayerClass
+{
+  GObjectClass parent;
+  void (*scale_rate)   (DemoPlayer   *player, gdouble     scale);
+  void (*set_rate)     (DemoPlayer   *player, gdouble     new_rate);
+  void (*load_uri)     (DemoPlayer   *player, gchar      *uri);
+  void (*play)         (DemoPlayer   *player);
+  void (*pause)        (DemoPlayer   *player);
+  void (*seek_by)      (DemoPlayer   *player, gint        seconds);
+  void (*seek_to)      (DemoPlayer   *player, gint        seconds);
+  gint (*get_position) (DemoPlayer   *player);
+  gint (*get_duration) (DemoPlayer   *player);
+};
+
+GType demo_player_get_type (void);
+
+void demo_player_scale_rate   (DemoPlayer   *player, gdouble    scale);
+void demo_player_set_rate     (DemoPlayer   *player, gdouble    new_rate);
+void demo_player_load_uri     (DemoPlayer   *player, gchar      *uri);
+void demo_player_play         (DemoPlayer   *player);
+void demo_player_pause        (DemoPlayer   *player);
+void demo_player_seek_by      (DemoPlayer   *player, gint        seconds);
+void demo_player_seek_to      (DemoPlayer   *player, gint        second);
+gint demo_player_get_position (DemoPlayer   *player);
+gint demo_player_get_duration (DemoPlayer   *player);
+
+G_END_DECLS
+
+#endif /* __DEMO_PLAYER_H_INCLUDED_ */
diff --git a/gst/scaletempo/Makefile.am b/gst/scaletempo/Makefile.am
new file mode 100644
index 00000000..a3c83993
--- /dev/null
+++ b/gst/scaletempo/Makefile.am
@@ -0,0 +1,13 @@
+plugin_LTLIBRARIES = libgstscaletempoplugin.la
+
+# sources used to compile this plug-in
+libgstscaletempoplugin_la_SOURCES = gstscaletempoplugin.c gstscaletempo.c
+
+# flags used to compile this plugin
+# add other _CFLAGS and _LIBS as needed
+libgstscaletempoplugin_la_CFLAGS = $(GST_CFLAGS)
+libgstscaletempoplugin_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS)
+libgstscaletempoplugin_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+# headers we need but don't want installed
+noinst_HEADERS = gstscaletempo.h
diff --git a/gst/scaletempo/gstscaletempo.c b/gst/scaletempo/gstscaletempo.c
new file mode 100644
index 00000000..923c2fd1
--- /dev/null
+++ b/gst/scaletempo/gstscaletempo.c
@@ -0,0 +1,748 @@
+/*
+ * GStreamer
+ * Copyright (C) 2008 Rov Juvano <rovjuvano@users.sourceforge.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * SECTION:element-scaletempo
+ *
+ * <refsect2>
+ * <para>
+ * Scale tempo while maintaining pitch
+ * (WSOLA-like technique with cross correlation)
+ * Inspired by SoundTouch library by Olli Parviainen
+ * </para>
+ * <para>
+ * Use Sceletempo to apply playback rates without the chipmunk effect.
+ * </para>
+ * <title>Example pipelines</title>
+ * <para>
+ * <programlisting>
+ * filesrc location=media.ext ! decodebin name=d \
+ *     d. ! queue ! audioconvert ! audioresample ! scaletempo ! audioconvert ! audioresample ! autoaudiosink \
+ *     d. ! queue ! ffmpegcolorspace ! autovideosink
+ * </programlisting>
+ * OR
+ * <programlisting>
+ * playbin uri=... audio_sink="scaletempo ! audioconvert ! audioresample ! autoaudiosink"
+ * </programlisting>
+ * When an application sends a seek event with rate != 1.0, Scaletempo applies
+ * the rate change by scaling the tempo without scaling the pitch.
+ * </para>
+ * <para>
+ * Scaletempo works by producing audio in constant sized chunks (a "stride") but
+ * consuming chunks proportional to the playback rate.
+ * </para>
+ * <para>
+ * Scaletempo then smooths the output by blending the end of one stride with
+ * the next ("overlap").
+ * </para>
+ * <para>
+ * Scaletempo smooths the overlap further by searching within the input buffer
+ * for the best overlap position.  Scaletempo uses a statistical cross correlation
+ * (roughly a dot-product).  Scaletempo consumes most of its CPU cycles here.
+ * </para>
+ * </refsect2>
+ */
+
+/*
+ * Note: frame = audio key unit (i.e. one sample for each channel)
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/base/gstbasetransform.h>
+#include <string.h>             /* for memset */
+
+#include "gstscaletempo.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_scaletempo_debug);
+#define GST_CAT_DEFAULT gst_scaletempo_debug
+
+/* Filter signals and args */
+enum
+{
+  LAST_SIGNAL
+};
+
+enum
+{
+  PROP_0,
+  PROP_RATE,
+  PROP_STRIDE,
+  PROP_OVERLAP,
+  PROP_SEARCH,
+};
+
+#define SUPPORTED_CAPS \
+GST_STATIC_CAPS ( \
+    "audio/x-raw-float, " \
+      "rate = (int) [ 1, MAX ], "       \
+      "channels = (int) [ 1, MAX ], " \
+      "endianness = (int) BYTE_ORDER, " \
+      "width = (int) 32;" \
+    "audio/x-raw-int, " \
+      "rate = (int) [ 1, MAX ], " \
+      "channels = (int) [ 1, MAX ], " \
+      "endianness = (int) BYTE_ORDER, " \
+      "width = (int) 16, " \
+      "depth = (int) 16, " \
+      "signed = (boolean) true;" \
+)
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    SUPPORTED_CAPS);
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    SUPPORTED_CAPS);
+
+#define DEBUG_INIT(bla) GST_DEBUG_CATEGORY_INIT (gst_scaletempo_debug, "scaletempo", 0, "scaletempo element");
+
+GST_BOILERPLATE_FULL (GstScaletempo, gst_scaletempo, GstBaseTransform,
+    GST_TYPE_BASE_TRANSFORM, DEBUG_INIT);
+
+typedef struct _GstScaletempoPrivate
+{
+  gdouble scale;
+  /* parameters */
+  guint ms_stride;
+  gdouble percent_overlap;
+  guint ms_search;
+  /* caps */
+  gboolean use_int;
+  guint samples_per_frame;      /* AKA number of channels */
+  guint bytes_per_sample;
+  guint bytes_per_frame;
+  guint sample_rate;
+  /* stride */
+  gdouble frames_stride_scaled;
+  gdouble frames_stride_error;
+  guint bytes_stride;
+  gdouble bytes_stride_scaled;
+  guint bytes_queue_max;
+  guint bytes_queued;
+  guint bytes_to_slide;
+  gint8 *buf_queue;
+  /* overlap */
+  guint samples_overlap;
+  guint samples_standing;
+  guint bytes_overlap;
+  guint bytes_standing;
+  gpointer buf_overlap;
+  gpointer table_blend;
+  void (*output_overlap) (GstScaletempo * scaletempo, gpointer out_buf,
+      guint bytes_off);
+  /* best overlap */
+  guint frames_search;
+  gpointer buf_pre_corr;
+  gpointer table_window;
+    guint (*best_overlap_offset) (GstScaletempo * scaletempo);
+  /* gstreamer */
+  gint64 segment_start;
+  /* threads */
+  gboolean reinit_buffers;
+} GstScaletempoPrivate;
+#define GST_SCALETEMPO_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GST_TYPE_SCALETEMPO, GstScaletempoPrivate))
+
+
+static guint
+best_overlap_offset_float (GstScaletempo * scaletempo)
+{
+  GstScaletempoPrivate *p = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+  gfloat *pw, *po, *ppc, *search_start;
+  gfloat best_corr = G_MININT;
+  guint best_off = 0;
+  gint i, off;
+
+  pw = p->table_window;
+  po = p->buf_overlap;
+  po += p->samples_per_frame;
+  ppc = p->buf_pre_corr;
+  for (i = p->samples_per_frame; i < p->samples_overlap; i++) {
+    *ppc++ = *pw++ * *po++;
+  }
+
+  search_start = (gfloat *) p->buf_queue + p->samples_per_frame;
+  for (off = 0; off < p->frames_search; off++) {
+    gfloat corr = 0;
+    gfloat *ps = search_start;
+    ppc = p->buf_pre_corr;
+    for (i = p->samples_per_frame; i < p->samples_overlap; i++) {
+      corr += *ppc++ * *ps++;
+    }
+    if (corr > best_corr) {
+      best_corr = corr;
+      best_off = off;
+    }
+    search_start += p->samples_per_frame;
+  }
+
+  return best_off * p->bytes_per_frame;
+}
+
+/* buffer padding for loop optimization: sizeof(gint32) * (loop_size - 1) */
+#define UNROLL_PADDING (4*3)
+static guint
+best_overlap_offset_s16 (GstScaletempo * scaletempo)
+{
+  GstScaletempoPrivate *p = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+  gint32 *pw, *ppc;
+  gint16 *po, *search_start;
+  gint64 best_corr = G_MININT64;
+  guint best_off = 0;
+  guint off;
+  glong i;
+
+  pw = p->table_window;
+  po = p->buf_overlap;
+  po += p->samples_per_frame;
+  ppc = p->buf_pre_corr;
+  for (i = p->samples_per_frame; i < p->samples_overlap; i++) {
+    *ppc++ = (*pw++ * *po++) >> 15;
+  }
+
+  search_start = (gint16 *) p->buf_queue + p->samples_per_frame;
+  for (off = 0; off < p->frames_search; off++) {
+    gint64 corr = 0;
+    gint16 *ps = search_start;
+    ppc = p->buf_pre_corr;
+    ppc += p->samples_overlap - p->samples_per_frame;
+    ps += p->samples_overlap - p->samples_per_frame;
+    i = -(p->samples_overlap - p->samples_per_frame);
+    do {
+      corr += ppc[i + 0] * ps[i + 0];
+      corr += ppc[i + 1] * ps[i + 1];
+      corr += ppc[i + 2] * ps[i + 2];
+      corr += ppc[i + 3] * ps[i + 3];
+      i += 4;
+    } while (i < 0);
+    if (corr > best_corr) {
+      best_corr = corr;
+      best_off = off;
+    }
+    search_start += p->samples_per_frame;
+  }
+
+  return best_off * p->bytes_per_frame;
+}
+
+static void
+output_overlap_float (GstScaletempo * scaletempo,
+    gpointer buf_out, guint bytes_off)
+{
+  GstScaletempoPrivate *p = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+  gfloat *pout = buf_out;
+  gfloat *pb = p->table_blend;
+  gfloat *po = p->buf_overlap;
+  gfloat *pin = (gfloat *) (p->buf_queue + bytes_off);
+  gint i;
+  for (i = 0; i < p->samples_overlap; i++) {
+    *pout++ = *po - *pb++ * (*po - *pin++);
+    po++;
+  }
+}
+
+static void
+output_overlap_s16 (GstScaletempo * scaletempo,
+    gpointer buf_out, guint bytes_off)
+{
+  GstScaletempoPrivate *p = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+  gint16 *pout = buf_out;
+  gint32 *pb = p->table_blend;
+  gint16 *po = p->buf_overlap;
+  gint16 *pin = (gint16 *) (p->buf_queue + bytes_off);
+  gint i;
+  for (i = 0; i < p->samples_overlap; i++) {
+    *pout++ = *po - ((*pb++ * (*po - *pin++)) >> 16);
+    po++;
+  }
+}
+
+static guint
+fill_queue (GstScaletempo * scaletempo, GstBuffer * buf_in, guint offset)
+{
+  GstScaletempoPrivate *p = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+  guint bytes_in = GST_BUFFER_SIZE (buf_in) - offset;
+  guint offset_unchanged = offset;
+
+  if (p->bytes_to_slide > 0) {
+    if (p->bytes_to_slide < p->bytes_queued) {
+      guint bytes_in_move = p->bytes_queued - p->bytes_to_slide;
+      memmove (p->buf_queue, p->buf_queue + p->bytes_to_slide, bytes_in_move);
+      p->bytes_to_slide = 0;
+      p->bytes_queued = bytes_in_move;
+    } else {
+      guint bytes_in_skip;
+      p->bytes_to_slide -= p->bytes_queued;
+      bytes_in_skip = MIN (p->bytes_to_slide, bytes_in);
+      p->bytes_queued = 0;
+      p->bytes_to_slide -= bytes_in_skip;
+      offset += bytes_in_skip;
+      bytes_in -= bytes_in_skip;
+    }
+  }
+
+  if (bytes_in > 0) {
+    guint bytes_in_copy = MIN (p->bytes_queue_max - p->bytes_queued, bytes_in);
+    memcpy (p->buf_queue + p->bytes_queued,
+        GST_BUFFER_DATA (buf_in) + offset, bytes_in_copy);
+    p->bytes_queued += bytes_in_copy;
+    offset += bytes_in_copy;
+  }
+
+  return offset - offset_unchanged;
+}
+
+static void
+reinit_buffers (GstScaletempo * scaletempo)
+{
+  GstScaletempoPrivate *p = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+  gint i, j;
+  guint frames_overlap;
+  guint new_size;
+
+  guint frames_stride = p->ms_stride * p->sample_rate / 1000.0;
+  p->bytes_stride = frames_stride * p->bytes_per_frame;
+
+  /* overlap */
+  frames_overlap = frames_stride * p->percent_overlap;
+  if (frames_overlap < 1) {     /* if no overlap */
+    p->bytes_overlap = 0;
+    p->bytes_standing = p->bytes_stride;
+    p->samples_standing = p->bytes_standing / p->bytes_per_sample;
+    p->output_overlap = NULL;
+  } else {
+    guint prev_overlap = p->bytes_overlap;
+    p->bytes_overlap = frames_overlap * p->bytes_per_frame;
+    p->samples_overlap = frames_overlap * p->samples_per_frame;
+    p->bytes_standing = p->bytes_stride - p->bytes_overlap;
+    p->samples_standing = p->bytes_standing / p->bytes_per_sample;
+    p->buf_overlap = g_realloc (p->buf_overlap, p->bytes_overlap);
+    p->table_blend = g_realloc (p->table_blend, p->samples_overlap * 4);        /* sizeof (gint32|gfloat) */
+    if (p->bytes_overlap > prev_overlap) {
+      memset (p->buf_overlap + prev_overlap, 0,
+          p->bytes_overlap - prev_overlap);
+    }
+    if (p->use_int) {
+      gint32 *pb = p->table_blend;
+      gint64 blend = 0;
+      for (i = 0; i < frames_overlap; i++) {
+        gint32 v = blend / frames_overlap;
+        for (j = 0; j < p->samples_per_frame; j++) {
+          *pb++ = v;
+        }
+        blend += 65535;         /* 2^16 */
+      }
+      p->output_overlap = output_overlap_s16;
+    } else {
+      gfloat *pb = p->table_blend;
+      gfloat t = (gfloat) frames_overlap;
+      for (i = 0; i < frames_overlap; i++) {
+        gfloat v = i / t;
+        for (j = 0; j < p->samples_per_frame; j++) {
+          *pb++ = v;
+        }
+      }
+      p->output_overlap = output_overlap_float;
+    }
+  }
+
+  /* best overlap */
+  p->frames_search =
+      (frames_overlap <= 1) ? 0 : p->ms_search * p->sample_rate / 1000.0;
+  if (p->frames_search < 1) {   /* if no search */
+    p->best_overlap_offset = NULL;
+  } else {
+    guint bytes_pre_corr = (p->samples_overlap - p->samples_per_frame) * 4;     /* sizeof (gint32|gfloat) */
+    p->buf_pre_corr =
+        g_realloc (p->buf_pre_corr, bytes_pre_corr + UNROLL_PADDING);
+    p->table_window = g_realloc (p->table_window, bytes_pre_corr);
+    if (p->use_int) {
+      gint64 t = frames_overlap;
+      gint32 n = 8589934588LL / (t * t);        /* 4 * (2^31 - 1) / t^2 */
+      gint32 *pw;
+
+      memset (p->buf_pre_corr + bytes_pre_corr, 0, UNROLL_PADDING);
+      pw = p->table_window;
+      for (i = 1; i < frames_overlap; i++) {
+        gint32 v = (i * (t - i) * n) >> 15;
+        for (j = 0; j < p->samples_per_frame; j++) {
+          *pw++ = v;
+        }
+      }
+      p->best_overlap_offset = best_overlap_offset_s16;
+    } else {
+      gfloat *pw = p->table_window;
+      for (i = 1; i < frames_overlap; i++) {
+        gfloat v = i * (frames_overlap - i);
+        for (j = 0; j < p->samples_per_frame; j++) {
+          *pw++ = v;
+        }
+      }
+      p->best_overlap_offset = best_overlap_offset_float;
+    }
+  }
+
+  new_size =
+      (p->frames_search + frames_stride + frames_overlap) * p->bytes_per_frame;
+  if (p->bytes_queued > new_size) {
+    if (p->bytes_to_slide > p->bytes_queued) {
+      p->bytes_to_slide -= p->bytes_queued;
+      p->bytes_queued = 0;
+    } else {
+      guint new_queued = MIN (p->bytes_queued - p->bytes_to_slide, new_size);
+      memmove (p->buf_queue,
+          p->buf_queue + p->bytes_queued - new_queued, new_queued);
+      p->bytes_to_slide = 0;
+      p->bytes_queued = new_queued;
+    }
+  }
+  p->bytes_queue_max = new_size;
+  p->buf_queue = g_realloc (p->buf_queue, p->bytes_queue_max);
+
+  p->bytes_stride_scaled = p->bytes_stride * p->scale;
+  p->frames_stride_scaled = p->bytes_stride_scaled / p->bytes_per_frame;
+
+  GST_DEBUG
+      ("%.3f scale, %.3f stride_in, %i stride_out, %i standing, %i overlap, %i search, %i queue, %s mode",
+      p->scale, p->frames_stride_scaled,
+      (gint) (p->bytes_stride / p->bytes_per_frame),
+      (gint) (p->bytes_standing / p->bytes_per_frame),
+      (gint) (p->bytes_overlap / p->bytes_per_frame), p->frames_search,
+      (gint) (p->bytes_queue_max / p->bytes_per_frame),
+      (p->use_int ? "s16" : "float"));
+
+  p->reinit_buffers = FALSE;
+}
+
+
+/* GstBaseTransform vmethod implementations */
+static GstFlowReturn
+gst_scaletempo_transform (GstBaseTransform * trans,
+    GstBuffer * inbuf, GstBuffer * outbuf)
+{
+  GstScaletempo *scaletempo = GST_SCALETEMPO (trans);
+  GstScaletempoPrivate *p = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+
+  gint8 *pout = (gint8 *) GST_BUFFER_DATA (outbuf);
+  guint offset_in = fill_queue (scaletempo, inbuf, 0);
+  guint bytes_out = 0;
+  while (p->bytes_queued >= p->bytes_queue_max) {
+    guint bytes_off = 0;
+    gdouble frames_to_slide;
+    guint frames_to_stride_whole;
+
+    // output stride
+    if (p->output_overlap) {
+      if (p->best_overlap_offset) {
+        bytes_off = p->best_overlap_offset (scaletempo);
+      }
+      p->output_overlap (scaletempo, pout, bytes_off);
+    }
+    memcpy (pout + p->bytes_overlap,
+        p->buf_queue + bytes_off + p->bytes_overlap, p->bytes_standing);
+    pout += p->bytes_stride;
+    bytes_out += p->bytes_stride;
+
+    // input stride
+    memcpy (p->buf_overlap,
+        p->buf_queue + bytes_off + p->bytes_stride, p->bytes_overlap);
+    frames_to_slide = p->frames_stride_scaled + p->frames_stride_error;
+    frames_to_stride_whole = (gint) frames_to_slide;
+    p->bytes_to_slide = frames_to_stride_whole * p->bytes_per_frame;
+    p->frames_stride_error = frames_to_slide - frames_to_stride_whole;
+
+    offset_in += fill_queue (scaletempo, inbuf, offset_in);
+  }
+
+  GST_BUFFER_SIZE (outbuf) = bytes_out;
+  GST_BUFFER_TIMESTAMP (outbuf) =
+      (GST_BUFFER_TIMESTAMP (outbuf) - p->segment_start) / p->scale +
+      p->segment_start;
+  //GST_BUFFER_DURATION (outbuf)  = bytes_out * GST_SECOND / (p->bytes_per_frame * p->sample_rate);
+  return GST_FLOW_OK;
+}
+
+static gboolean
+gst_scaletempo_transform_size (GstBaseTransform * trans,
+    GstPadDirection direction,
+    GstCaps * caps, guint size, GstCaps * othercaps, guint * othersize)
+{
+  if (direction == GST_PAD_SINK) {
+    GstScaletempo *scaletempo = GST_SCALETEMPO (trans);
+    GstScaletempoPrivate *priv = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+    gint bytes_to_out;
+
+    if (priv->reinit_buffers)
+      reinit_buffers (scaletempo);
+
+    bytes_to_out = size + priv->bytes_queued - priv->bytes_to_slide;
+    if (bytes_to_out < (gint) priv->bytes_queue_max) {
+      *othersize = 0;
+    } else {
+      /* while (total_buffered - stride_length * n >= queue_max) n++ */
+      *othersize = priv->bytes_stride * ((guint) (
+              (bytes_to_out - priv->bytes_queue_max +
+                  /* rounding protection */ priv->bytes_per_frame)
+              / priv->bytes_stride_scaled) + 1);
+    }
+
+    return TRUE;
+  }
+  return FALSE;
+}
+
+static gboolean
+gst_scaletempo_sink_event (GstBaseTransform * trans, GstEvent * event)
+{
+  if (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT) {
+    GstScaletempo *scaletempo = GST_SCALETEMPO (trans);
+    GstScaletempoPrivate *priv = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+
+    gboolean update;
+    gdouble rate, applied_rate;
+    GstFormat format;
+    gint64 start, stop, position;
+
+    gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
+        &format, &start, &stop, &position);
+
+    if (priv->scale != rate) {
+      if (ABS (rate - 1.0) < 1e-10) {
+        priv->scale = 1.0;
+        gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (scaletempo),
+            TRUE);
+      } else {
+        gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (scaletempo),
+            FALSE);
+        priv->scale = rate;
+        priv->bytes_stride_scaled = priv->bytes_stride * priv->scale;
+        priv->frames_stride_scaled =
+            priv->bytes_stride_scaled / priv->bytes_per_frame;
+        GST_DEBUG ("%.3f scale, %.3f stride_in, %i stride_out", priv->scale,
+            priv->frames_stride_scaled,
+            (gint) (priv->bytes_stride / priv->bytes_per_frame));
+
+        priv->bytes_to_slide = 0;
+      }
+    }
+
+    if (priv->scale != 1.0) {
+      priv->segment_start = start;
+      applied_rate = priv->scale;
+      rate = 1.0;
+      //gst_event_unref (event);
+      event = gst_event_new_new_segment_full (update, rate, applied_rate,
+          format, start, stop, position);
+      gst_pad_push_event (GST_BASE_TRANSFORM_SRC_PAD (trans), event);
+      return FALSE;
+    }
+  }
+  parent_class->event (trans, event);
+  return TRUE;
+}
+
+static gboolean
+gst_scaletempo_set_caps (GstBaseTransform * trans,
+    GstCaps * incaps, GstCaps * outcaps)
+{
+  GstScaletempo *scaletempo = GST_SCALETEMPO (trans);
+  GstScaletempoPrivate *priv = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+  GstStructure *s = gst_caps_get_structure (incaps, 0);
+
+  gint width, bps, nch, rate;
+  gboolean use_int;
+  const gchar *type = gst_structure_get_name (s);
+  if (g_str_equal (type, "audio/x-raw-int")) {
+    use_int = TRUE;
+    gst_structure_get_int (s, "depth", &width);
+  } else if (g_str_equal (type, "audio/x-raw-float")) {
+    use_int = FALSE;
+    gst_structure_get_int (s, "width", &width);
+  } else {
+    return FALSE;
+  }
+  bps = width / 8;
+
+  gst_structure_get_int (s, "channels", &nch);
+  gst_structure_get_int (s, "rate", &rate);
+
+  GST_DEBUG ("caps: %s seek, "
+      "%5" G_GUINT32_FORMAT " rate, "
+      "%2" G_GUINT32_FORMAT " nch, "
+      "%2" G_GUINT32_FORMAT " bps", type, rate, nch, bps);
+
+  if (rate != priv->sample_rate
+      || nch != priv->samples_per_frame
+      || bps != priv->bytes_per_sample || use_int != priv->use_int) {
+    priv->sample_rate = rate;
+    priv->samples_per_frame = nch;
+    priv->bytes_per_sample = bps;
+    priv->bytes_per_frame = nch * bps;
+    priv->use_int = use_int;
+    priv->reinit_buffers = TRUE;
+  }
+
+  return TRUE;
+}
+
+
+/* GObject vmethod implementations */
+static void
+gst_scaletempo_get_property (GObject * object,
+    guint prop_id, GValue * value, GParamSpec * pspec)
+{
+  GstScaletempo *scaletempo = GST_SCALETEMPO (object);
+  GstScaletempoPrivate *priv = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+
+  switch (prop_id) {
+    case PROP_RATE:
+      g_value_set_double (value, priv->scale);
+      break;
+    case PROP_STRIDE:
+      g_value_set_uint (value, priv->ms_stride);
+      break;
+    case PROP_OVERLAP:
+      g_value_set_double (value, priv->percent_overlap);
+      break;
+    case PROP_SEARCH:
+      g_value_set_uint (value, priv->ms_search);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_scaletempo_set_property (GObject * object,
+    guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+  GstScaletempo *scaletempo = GST_SCALETEMPO (object);
+  GstScaletempoPrivate *priv = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+
+  switch (prop_id) {
+    case PROP_STRIDE:{
+      guint new_value = g_value_get_uint (value);
+      if (priv->ms_stride != new_value) {
+        priv->ms_stride = new_value;
+        priv->reinit_buffers = TRUE;
+      }
+      break;
+    }
+    case PROP_OVERLAP:{
+      gdouble new_value = g_value_get_double (value);
+      if (priv->percent_overlap != new_value) {
+        priv->percent_overlap = new_value;
+        priv->reinit_buffers = TRUE;
+      }
+      break;
+    }
+    case PROP_SEARCH:{
+      guint new_value = g_value_get_uint (value);
+      if (priv->ms_search != new_value) {
+        priv->ms_search = new_value;
+        priv->reinit_buffers = TRUE;
+      }
+      break;
+    }
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_scaletempo_base_init (gpointer klass)
+{
+  static GstElementDetails element_details = {
+    "Scaletempo",
+    "Filter/Effect/Rate",
+    "Sync audio tempo with playback rate",
+    "Rov Juvano <rovjuvano@users.sourceforge.net>"
+  };
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&sink_template));
+  gst_element_class_set_details (element_class, &element_details);
+}
+
+static void
+gst_scaletempo_class_init (GstScaletempoClass * klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+  GstBaseTransformClass *basetransform_class = GST_BASE_TRANSFORM_CLASS (klass);
+
+  g_type_class_add_private (klass, sizeof (GstScaletempoPrivate));
+
+  gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_scaletempo_get_property);
+  gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_scaletempo_set_property);
+
+  g_object_class_install_property (gobject_class, PROP_RATE,
+      g_param_spec_double ("rate", "Playback Rate", "Current playback rate",
+          G_MININT, G_MAXINT, 1.0, G_PARAM_READABLE));
+
+  g_object_class_install_property (gobject_class, PROP_STRIDE,
+      g_param_spec_uint ("stride", "Stride Length",
+          "Length in milliseconds to output each stride", 1, 5000, 30,
+          G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class, PROP_OVERLAP,
+      g_param_spec_double ("overlap", "Overlap Length",
+          "Percentage of stride to overlap", 0, 1, .2, G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class, PROP_SEARCH,
+      g_param_spec_uint ("search", "Search Length",
+          "Length in milliseconds to search for best overlap position", 0, 500,
+          14, G_PARAM_READWRITE));
+
+  basetransform_class->event = GST_DEBUG_FUNCPTR (gst_scaletempo_sink_event);
+  basetransform_class->set_caps = GST_DEBUG_FUNCPTR (gst_scaletempo_set_caps);
+  basetransform_class->transform_size =
+      GST_DEBUG_FUNCPTR (gst_scaletempo_transform_size);
+  basetransform_class->transform = GST_DEBUG_FUNCPTR (gst_scaletempo_transform);
+}
+
+static void
+gst_scaletempo_init (GstScaletempo * scaletempo, GstScaletempoClass * klass)
+{
+  GstScaletempoPrivate *priv = GST_SCALETEMPO_GET_PRIVATE (scaletempo);
+  /* defaults */
+  priv->ms_stride = 30;
+  priv->percent_overlap = .2;
+  priv->ms_search = 14;
+
+  /* uninitialized */
+  priv->scale = 0;
+  priv->sample_rate = 0;
+  priv->frames_stride_error = 0;
+  priv->bytes_stride = 0;
+  priv->bytes_queued = 0;
+  priv->bytes_to_slide = 0;
+  priv->segment_start = 0;
+}
diff --git a/gst/scaletempo/gstscaletempo.h b/gst/scaletempo/gstscaletempo.h
new file mode 100644
index 00000000..af2e8bbf
--- /dev/null
+++ b/gst/scaletempo/gstscaletempo.h
@@ -0,0 +1,49 @@
+/*
+ * GStreamer
+ * Copyright (C) 2008 Rov Juvano <rovjuvano@users.sourceforge.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_SCALETEMPO_H__
+#define __GST_SCALETEMPO_H__
+
+#include <gst/gst.h>
+#include <gst/base/gstbasetransform.h>
+
+G_BEGIN_DECLS
+#define GST_TYPE_SCALETEMPO            (gst_scaletempo_get_type())
+#define GST_SCALETEMPO(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_SCALETEMPO, GstScaletempo))
+#define GST_SCALETEMPO_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),  GST_TYPE_SCALETEMPO, GstScaletempoClass))
+#define GST_IS_SCALETEMPO(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_SCALETEMPO))
+#define GST_IS_SCALETEMPO_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),  GST_TYPE_SCALETEMPO))
+typedef struct _GstScaletempo GstScaletempo;
+typedef struct _GstScaletempoClass GstScaletempoClass;
+
+struct _GstScaletempo
+{
+  GstBaseTransform element;
+};
+
+struct _GstScaletempoClass
+{
+  GstBaseTransformClass parent_class;
+};
+
+GType gst_scaletempo_get_type (void);
+
+G_END_DECLS
+#endif /* __GST_SCALETEMPO_H__ */
diff --git a/gst/scaletempo/gstscaletempoplugin.c b/gst/scaletempo/gstscaletempoplugin.c
new file mode 100644
index 00000000..24e16e8f
--- /dev/null
+++ b/gst/scaletempo/gstscaletempoplugin.c
@@ -0,0 +1,74 @@
+/*
+ * GStreamer
+ * Copyright (C) 2008 Rov Juvano <rovjuvano@users.sourceforge.net>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
+ * which case the following provisions apply instead of the ones
+ * mentioned above:
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <gst/gst.h>
+#include "gstscaletempo.h"
+
+/* entry point to initialize the plug-in
+ * initialize the plug-in itself
+ * register the element factories and pad templates
+ * register the features
+ *
+ * exchange the string 'plugin' with your elemnt name
+ */
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "scaletempo", GST_RANK_NONE,
+      GST_TYPE_SCALETEMPO);
+}
+
+/* this is the structure that gstreamer looks for to register plugins
+ *
+ * exchange the strings 'plugin' and 'Template plugin' with you plugin name and
+ * description
+ */
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR,
+    "scaletempo", "Scale audio tempo in sync with playback rate",
+    plugin_init, VERSION, "LGPL", "GStreamer",
+    "http://gstreamer.freedesktop.org/")