Adding my work in progress rewrite from scratch of libgstplay.

Original commit message from CVS:
Adding my work in progress rewrite from scratch of libgstplay.

4 files changed, 1030 insertions, 0 deletions

diff --git a/gst-libs/gst/play/gstplay.c b/gst-libs/gst/play/gstplay.c
new file mode 100644
index 00000000..09f143e0
--- /dev/null
+++ b/gst-libs/gst/play/gstplay.c
@@ -0,0 +1,439 @@
+/* GStreamer
+ * Copyright (C) 2003 Julien Moutte <julien@moutte.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.
+ */
+ 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstplay.h"
+
+#include <gst/xoverlay/xoverlay.h>
+#include <gst/navigation/navigation.h>
+#include <gst/mixer/mixer.h>
+
+enum
+{
+  TIME_TICK,
+  STREAM_LENGTH,
+  HAVE_VIDEO_SIZE,
+  LAST_SIGNAL
+};
+
+static guint gst_play_signals[LAST_SIGNAL] = { 0 };
+
+static GstPipelineClass *parent_class = NULL;
+
+/* ======================================================= */
+/*                                                         */
+/*                    Private Methods                      */
+/*                                                         */
+/* ======================================================= */
+
+static gboolean
+gst_play_pipeline_setup (GstPlay *play)
+{
+  GstElement *work_thread, *video_thread;
+  GstElement *video_queue, *video_colorspace, *video_scaler, *video_sink;
+  GstElement *audio_thread, *audio_queue, *audio_volume, *audio_sink;
+  GstElement *audio_tee, *vis_thread, *vis_queue;
+  GstPad *audio_tee_pad1, *audio_tee_pad2, *vis_thread_pad, *audio_sink_pad;
+  
+  g_return_val_if_fail (play != NULL, FALSE);
+  g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
+  
+  work_thread = gst_thread_new ("work_thread");
+  if (!GST_IS_THREAD (work_thread))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "work_thread", work_thread);
+  gst_bin_add (GST_BIN (play), work_thread);
+  
+  /* Creating our video output bin
+     { queue ! colorspace ! videoscale ! fakesink } */
+  video_thread = gst_thread_new ("video_thread");
+  if (!GST_IS_THREAD (video_thread))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "video_thread", video_thread);
+  gst_bin_add (GST_BIN (work_thread), video_thread);
+  
+  /* Buffer queue for our video thread */
+  video_queue = gst_element_factory_make ("queue", "video_queue");
+  if (!GST_IS_ELEMENT (video_queue))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "video_queue", video_queue);
+  
+  /* Colorspace conversion */
+  /* FIXME: Use ffcolorspace and fallback to Hermes on failure ?*/
+  video_colorspace = gst_element_factory_make ("colorspace",
+                                               "video_colorspace");
+  if (!GST_IS_ELEMENT (video_colorspace))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "video_colorspace",
+                       video_colorspace);
+  
+  /* Software scaling of video stream */
+  video_scaler = gst_element_factory_make ("videoscale", "video_scaler");
+  if (!GST_IS_ELEMENT (video_scaler))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "video_scaler", video_scaler);
+  
+  /* Placeholder for future video sink bin */
+  video_sink = gst_element_factory_make ("fakesink", "video_sink");
+  if (!GST_IS_ELEMENT (video_sink))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "video_sink", video_sink);
+  
+  /* Linking, Adding, Ghosting */
+  gst_element_link_many (video_queue, video_colorspace,
+                         video_scaler, video_sink, NULL);
+  gst_bin_add_many (GST_BIN (video_thread), video_queue, video_colorspace,
+                    video_scaler, video_sink, NULL);
+  gst_element_add_ghost_pad (video_thread,
+                             gst_element_get_pad (video_queue, "sink"),
+			     "sink");
+  
+  /* Creating our audio output bin 
+     { queue ! volume ! tee ! { queue ! goom } ! fakesink } */
+  audio_thread = gst_thread_new ("audio_thread");
+  if (!GST_IS_THREAD (audio_thread))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "audio_thread", audio_thread);
+  gst_bin_add (GST_BIN (work_thread), audio_thread);
+  
+  /* Buffer queue for our audio thread */
+  audio_queue = gst_element_factory_make ("queue", "audio_queue");
+  if (!GST_IS_ELEMENT (audio_queue))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "audio_queue", audio_queue);
+  
+  /* Volume control */
+  audio_volume = gst_element_factory_make ("volume", "audio_volume");
+  if (!GST_IS_ELEMENT (audio_volume))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "audio_volume", audio_volume);
+  
+  /* Duplicate audio signal to sink and visualization thread */
+  audio_tee = gst_element_factory_make ("tee", "audio_tee");
+  if (!GST_IS_ELEMENT (audio_tee))
+    return FALSE;
+  
+  audio_tee_pad1 = gst_element_get_request_pad (audio_tee, "src%d");
+  audio_tee_pad2 = gst_element_get_request_pad (audio_tee, "src%d");
+  g_hash_table_insert (play->elements, "audio_tee_pad1", audio_tee_pad1);
+  g_hash_table_insert (play->elements, "audio_tee_pad2", audio_tee_pad2);
+  g_hash_table_insert (play->elements, "audio_tee", audio_tee);
+  
+  /* Placeholder for future audio sink bin */
+  audio_sink = gst_element_factory_make ("fakesink", "audio_sink");
+  if (!GST_IS_ELEMENT (audio_sink))
+    return FALSE;
+  
+  audio_sink_pad = gst_element_get_pad (audio_sink, "sink");
+  g_hash_table_insert (play->elements, "audio_sink_pad", audio_sink_pad);
+  g_hash_table_insert (play->elements, "audio_sink", audio_sink);
+  
+  /* Visualization thread */
+  vis_thread = gst_thread_new ("vis_thread");
+  if (!GST_IS_THREAD (vis_thread))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "vis_thread", vis_thread);
+  
+  /* Buffer queue for our visualization thread */
+  vis_queue = gst_element_factory_make ("queue", "vis_queue");
+  if (!GST_IS_ELEMENT (vis_queue))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "vis_queue", vis_queue);
+  
+  /* Adding, Ghosting in visualization */
+  gst_bin_add (GST_BIN (vis_thread), vis_queue);
+  vis_thread_pad = gst_element_add_ghost_pad (vis_thread,
+                                     gst_element_get_pad (vis_queue, "sink"),
+			             "sink");
+  g_hash_table_insert (play->elements, "vis_thread_pad", vis_thread_pad);
+  
+  
+  /* Linking, Adding, Ghosting in audio */
+  gst_element_link_many (audio_queue, audio_volume, audio_tee, NULL);
+  gst_pad_link (audio_tee_pad1, audio_sink_pad);
+  gst_bin_add_many (GST_BIN (audio_thread), audio_queue, audio_volume,
+                    audio_tee, vis_thread, audio_sink);
+  gst_element_add_ghost_pad (audio_thread,
+                             gst_element_get_pad (audio_queue, "sink"),
+			     "sink");
+  
+  return TRUE;
+}
+
+/* =========================================== */
+/*                                             */
+/*                 Interfaces                  */
+/*                                             */
+/* =========================================== */
+
+static gboolean
+gst_play_interface_supported (GstInterface *iface, GType type)
+{
+  g_assert (type == GST_TYPE_NAVIGATION ||
+            type == GST_TYPE_X_OVERLAY ||
+            type == GST_TYPE_MIXER);
+  return TRUE;
+}
+
+static void
+gst_play_interface_init (GstInterfaceClass *klass)
+{
+  klass->supported = gst_play_interface_supported;
+}
+
+static void
+gst_play_navigation_send_event (GstNavigation *navigation,
+                                GstStructure *structure)
+{
+  
+}
+
+static void
+gst_play_navigation_init (GstNavigationInterface *iface)
+{
+  iface->send_event = gst_play_navigation_send_event;
+}
+
+static void
+gst_play_set_xwindow_id (GstXOverlay *overlay, XID xwindow_id)
+{
+  
+}
+
+static void
+gst_play_xoverlay_init (GstXOverlayClass *iface)
+{
+  iface->set_xwindow_id = gst_play_set_xwindow_id;
+}
+
+static void
+gst_play_mixer_init (GstMixerClass *klass)
+{
+  klass->list_tracks = NULL;
+  klass->set_volume = NULL;
+  klass->get_volume = NULL;
+  klass->set_mute = NULL;
+  klass->set_record = NULL;
+}
+
+/* =========================================== */
+/*                                             */
+/*         Init & Dispose & Class init         */
+/*                                             */
+/* =========================================== */
+
+static void
+gst_play_dispose (GObject *object)
+{
+  GstPlay *play;
+  
+  g_return_if_fail (object != NULL);
+  g_return_if_fail (GST_IS_PLAY (object));
+  
+  play = GST_PLAY (object);
+    
+  if (play->location)
+    {
+      g_free (play->location);
+      play->location = NULL;
+    }
+  
+  if (play->elements)
+    {
+      g_hash_table_destroy (play->elements);
+      play->elements = NULL;
+    }
+    
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gst_play_init (GstPlay *play)
+{
+  play->location = NULL;
+  play->elements = g_hash_table_new (g_str_hash, g_str_equal);
+  if (!gst_play_pipeline_setup (play))
+    g_warning ("libgstplay: failed initializing pipeline");
+}
+
+static void
+gst_play_class_init (GstPlayClass *klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gobject_class->dispose = gst_play_dispose;
+
+  gst_play_signals[TIME_TICK] =
+    g_signal_new ("time_tick", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GstPlayClass, time_tick), NULL, NULL,
+                  gst_marshal_VOID__INT64, G_TYPE_NONE, 1, G_TYPE_INT64);
+  gst_play_signals[STREAM_LENGTH] =
+    g_signal_new ("stream_length", G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GstPlayClass, stream_length), NULL, NULL,
+                  gst_marshal_VOID__INT64, G_TYPE_NONE, 1, G_TYPE_INT64);
+  gst_play_signals[HAVE_VIDEO_SIZE] =
+    g_signal_new ("have_video_size", G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GstPlayClass, have_video_size), NULL, NULL,
+                  gst_marshal_VOID__INT_INT, G_TYPE_NONE, 2,
+                  G_TYPE_INT, G_TYPE_INT);
+}
+
+/* ======================================================= */
+/*                                                         */
+/*                     Public Methods                      */
+/*                                                         */
+/* ======================================================= */
+
+/**
+ * gst_play_set_location:
+ * @play: a #GstPlay.
+ * @location: a const #char* indicating location to play
+ *
+ * Set location of @play to @location.
+ *
+ * Returns: TRUE if location was set successfully.
+ */
+gboolean
+gst_play_set_location (GstPlay *play, const char *location)
+{
+  g_return_val_if_fail (play != NULL, FALSE);
+  g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
+  
+  if (play->location)
+    g_free (play->location);
+  
+  play->location = g_strdup (location);
+  
+  if (GST_STATE (GST_ELEMENT (play)) != GST_STATE_READY)
+    gst_element_set_state (GST_ELEMENT (play), GST_STATE_READY);
+  
+  return TRUE;
+}
+
+/**
+ * gst_play_get_location:
+ * @play: a #GstPlay.
+ *
+ * Get current location of @play.
+ *
+ * Returns: a const #char* pointer to current location.
+ */
+char *
+gst_play_get_location (GstPlay *play)
+{
+  g_return_val_if_fail (play != NULL, NULL);
+  g_return_val_if_fail (GST_IS_PLAY (play), NULL);
+  return g_strdup (play->location);
+}
+
+/**
+ * gst_play_seek_to_time:
+ * @play: a #GstPlay.
+ * @time_nanos: a #gint64 indicating a time position.
+ *
+ * Performs a seek on @play until @time_nanos.
+ */
+gboolean
+gst_play_seek_to_time (GstPlay * play, gint64 time_nanos)
+{
+  g_return_val_if_fail (play != NULL, FALSE);
+  g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
+  
+  return TRUE;
+}
+
+/* =========================================== */
+/*                                             */
+/*          Object typing & Creation           */
+/*                                             */
+/* =========================================== */
+
+GType
+gst_play_get_type (void)
+{
+  static GType play_type = 0;
+
+  if (!play_type)
+    {
+      static const GTypeInfo play_info = {
+	sizeof (GstPlayClass),
+	NULL,
+	NULL,
+	(GClassInitFunc) gst_play_class_init,
+	NULL,
+        NULL,
+        sizeof (GstPlay),
+	0,
+        (GInstanceInitFunc) gst_play_init,
+	NULL
+      };
+      static const GInterfaceInfo iface_info = {
+        (GInterfaceInitFunc) gst_play_interface_init,
+        NULL,
+        NULL,
+      };
+      static const GInterfaceInfo navigation_info = {
+        (GInterfaceInitFunc) gst_play_navigation_init,
+        NULL,
+        NULL,
+      };
+      static const GInterfaceInfo overlay_info = {
+        (GInterfaceInitFunc) gst_play_xoverlay_init,
+        NULL,
+        NULL,
+      };
+      static const GInterfaceInfo mixer_info = {
+        (GInterfaceInitFunc) gst_play_mixer_init,
+        NULL,
+        NULL,
+      };
+      
+      play_type = g_type_register_static (GST_TYPE_PIPELINE, "GstPlay",
+                                          &play_info, 0);
+      
+      g_type_add_interface_static (play_type, GST_TYPE_INTERFACE,
+                                   &iface_info);
+      g_type_add_interface_static (play_type, GST_TYPE_NAVIGATION,
+                                   &navigation_info);
+      g_type_add_interface_static (play_type, GST_TYPE_X_OVERLAY,
+                                   &overlay_info);
+      g_type_add_interface_static (play_type, GST_TYPE_MIXER,
+                                   &mixer_info);
+    }
+
+  return play_type;
+}
diff --git a/gst-libs/gst/play/gstplay.h b/gst-libs/gst/play/gstplay.h
new file mode 100644
index 00000000..5ddbd812
--- /dev/null
+++ b/gst-libs/gst/play/gstplay.h
@@ -0,0 +1,76 @@
+/* GStreamer
+ * Copyright (C) 2003 Julien Moutte <julien@moutte.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_PLAY_H__
+#define __GST_PLAY_H__
+
+#include <gst/gstpipeline.h>
+
+#define GST_TYPE_PLAY            (gst_play_get_type())
+#define GST_PLAY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PLAY, GstPlay))
+#define GST_PLAY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PLAY, GstPlayClass))
+#define GST_IS_PLAY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PLAY))
+#define GST_IS_PLAY_CLASS(obj)   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PLAY))
+#define GST_PLAY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_PLAY, GstPlayClass))
+
+typedef struct _GstPlay GstPlay;
+typedef struct _GstPlayClass GstPlayClass;
+  
+struct _GstPlay
+{
+  GstPipeline pipeline;
+  
+  char *location;
+  
+  GHashTable *elements;
+  
+  GST_OBJECT_PADDING
+};
+
+struct _GstPlayClass
+{
+  GstPipelineClass parent_class;
+  
+  void (*time_tick)       (GstPlay *play, gint64 time_nanos);
+  void (*stream_length)   (GstPlay *play, gint64 length_nanos);
+  void (*have_video_size) (GstPlay *play, gint width, gint height);
+  
+  GST_CLASS_PADDING
+};
+
+GType                 gst_play_get_type              (void);
+
+gboolean              gst_play_set_video_sink        (GstPlay *play,
+                                                      GstElement *video_sink);
+gboolean              gst_play_set_audio_sink        (GstPlay *play,
+                                                      GstElement *audio_sink);
+
+gboolean              gst_play_set_visualization     (GstPlay *play,
+                                                      GstElement *element);
+gboolean              gst_play_connect_visualization (GstPlay *play,
+                                                      gboolean connect);
+
+gboolean              gst_play_set_location          (GstPlay *play,
+                                                      const char *location);
+char *                gst_play_get_location          (GstPlay *play);
+
+gboolean              gst_play_seek_to_time          (GstPlay *play,
+                                                      gint64 time_nanos);
+
+#endif /* __GST_PLAY_H__ */
diff --git a/gst-libs/gst/play/play.c b/gst-libs/gst/play/play.c
new file mode 100644
index 00000000..09f143e0
--- /dev/null
+++ b/gst-libs/gst/play/play.c
@@ -0,0 +1,439 @@
+/* GStreamer
+ * Copyright (C) 2003 Julien Moutte <julien@moutte.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.
+ */
+ 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstplay.h"
+
+#include <gst/xoverlay/xoverlay.h>
+#include <gst/navigation/navigation.h>
+#include <gst/mixer/mixer.h>
+
+enum
+{
+  TIME_TICK,
+  STREAM_LENGTH,
+  HAVE_VIDEO_SIZE,
+  LAST_SIGNAL
+};
+
+static guint gst_play_signals[LAST_SIGNAL] = { 0 };
+
+static GstPipelineClass *parent_class = NULL;
+
+/* ======================================================= */
+/*                                                         */
+/*                    Private Methods                      */
+/*                                                         */
+/* ======================================================= */
+
+static gboolean
+gst_play_pipeline_setup (GstPlay *play)
+{
+  GstElement *work_thread, *video_thread;
+  GstElement *video_queue, *video_colorspace, *video_scaler, *video_sink;
+  GstElement *audio_thread, *audio_queue, *audio_volume, *audio_sink;
+  GstElement *audio_tee, *vis_thread, *vis_queue;
+  GstPad *audio_tee_pad1, *audio_tee_pad2, *vis_thread_pad, *audio_sink_pad;
+  
+  g_return_val_if_fail (play != NULL, FALSE);
+  g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
+  
+  work_thread = gst_thread_new ("work_thread");
+  if (!GST_IS_THREAD (work_thread))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "work_thread", work_thread);
+  gst_bin_add (GST_BIN (play), work_thread);
+  
+  /* Creating our video output bin
+     { queue ! colorspace ! videoscale ! fakesink } */
+  video_thread = gst_thread_new ("video_thread");
+  if (!GST_IS_THREAD (video_thread))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "video_thread", video_thread);
+  gst_bin_add (GST_BIN (work_thread), video_thread);
+  
+  /* Buffer queue for our video thread */
+  video_queue = gst_element_factory_make ("queue", "video_queue");
+  if (!GST_IS_ELEMENT (video_queue))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "video_queue", video_queue);
+  
+  /* Colorspace conversion */
+  /* FIXME: Use ffcolorspace and fallback to Hermes on failure ?*/
+  video_colorspace = gst_element_factory_make ("colorspace",
+                                               "video_colorspace");
+  if (!GST_IS_ELEMENT (video_colorspace))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "video_colorspace",
+                       video_colorspace);
+  
+  /* Software scaling of video stream */
+  video_scaler = gst_element_factory_make ("videoscale", "video_scaler");
+  if (!GST_IS_ELEMENT (video_scaler))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "video_scaler", video_scaler);
+  
+  /* Placeholder for future video sink bin */
+  video_sink = gst_element_factory_make ("fakesink", "video_sink");
+  if (!GST_IS_ELEMENT (video_sink))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "video_sink", video_sink);
+  
+  /* Linking, Adding, Ghosting */
+  gst_element_link_many (video_queue, video_colorspace,
+                         video_scaler, video_sink, NULL);
+  gst_bin_add_many (GST_BIN (video_thread), video_queue, video_colorspace,
+                    video_scaler, video_sink, NULL);
+  gst_element_add_ghost_pad (video_thread,
+                             gst_element_get_pad (video_queue, "sink"),
+			     "sink");
+  
+  /* Creating our audio output bin 
+     { queue ! volume ! tee ! { queue ! goom } ! fakesink } */
+  audio_thread = gst_thread_new ("audio_thread");
+  if (!GST_IS_THREAD (audio_thread))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "audio_thread", audio_thread);
+  gst_bin_add (GST_BIN (work_thread), audio_thread);
+  
+  /* Buffer queue for our audio thread */
+  audio_queue = gst_element_factory_make ("queue", "audio_queue");
+  if (!GST_IS_ELEMENT (audio_queue))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "audio_queue", audio_queue);
+  
+  /* Volume control */
+  audio_volume = gst_element_factory_make ("volume", "audio_volume");
+  if (!GST_IS_ELEMENT (audio_volume))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "audio_volume", audio_volume);
+  
+  /* Duplicate audio signal to sink and visualization thread */
+  audio_tee = gst_element_factory_make ("tee", "audio_tee");
+  if (!GST_IS_ELEMENT (audio_tee))
+    return FALSE;
+  
+  audio_tee_pad1 = gst_element_get_request_pad (audio_tee, "src%d");
+  audio_tee_pad2 = gst_element_get_request_pad (audio_tee, "src%d");
+  g_hash_table_insert (play->elements, "audio_tee_pad1", audio_tee_pad1);
+  g_hash_table_insert (play->elements, "audio_tee_pad2", audio_tee_pad2);
+  g_hash_table_insert (play->elements, "audio_tee", audio_tee);
+  
+  /* Placeholder for future audio sink bin */
+  audio_sink = gst_element_factory_make ("fakesink", "audio_sink");
+  if (!GST_IS_ELEMENT (audio_sink))
+    return FALSE;
+  
+  audio_sink_pad = gst_element_get_pad (audio_sink, "sink");
+  g_hash_table_insert (play->elements, "audio_sink_pad", audio_sink_pad);
+  g_hash_table_insert (play->elements, "audio_sink", audio_sink);
+  
+  /* Visualization thread */
+  vis_thread = gst_thread_new ("vis_thread");
+  if (!GST_IS_THREAD (vis_thread))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "vis_thread", vis_thread);
+  
+  /* Buffer queue for our visualization thread */
+  vis_queue = gst_element_factory_make ("queue", "vis_queue");
+  if (!GST_IS_ELEMENT (vis_queue))
+    return FALSE;
+  
+  g_hash_table_insert (play->elements, "vis_queue", vis_queue);
+  
+  /* Adding, Ghosting in visualization */
+  gst_bin_add (GST_BIN (vis_thread), vis_queue);
+  vis_thread_pad = gst_element_add_ghost_pad (vis_thread,
+                                     gst_element_get_pad (vis_queue, "sink"),
+			             "sink");
+  g_hash_table_insert (play->elements, "vis_thread_pad", vis_thread_pad);
+  
+  
+  /* Linking, Adding, Ghosting in audio */
+  gst_element_link_many (audio_queue, audio_volume, audio_tee, NULL);
+  gst_pad_link (audio_tee_pad1, audio_sink_pad);
+  gst_bin_add_many (GST_BIN (audio_thread), audio_queue, audio_volume,
+                    audio_tee, vis_thread, audio_sink);
+  gst_element_add_ghost_pad (audio_thread,
+                             gst_element_get_pad (audio_queue, "sink"),
+			     "sink");
+  
+  return TRUE;
+}
+
+/* =========================================== */
+/*                                             */
+/*                 Interfaces                  */
+/*                                             */
+/* =========================================== */
+
+static gboolean
+gst_play_interface_supported (GstInterface *iface, GType type)
+{
+  g_assert (type == GST_TYPE_NAVIGATION ||
+            type == GST_TYPE_X_OVERLAY ||
+            type == GST_TYPE_MIXER);
+  return TRUE;
+}
+
+static void
+gst_play_interface_init (GstInterfaceClass *klass)
+{
+  klass->supported = gst_play_interface_supported;
+}
+
+static void
+gst_play_navigation_send_event (GstNavigation *navigation,
+                                GstStructure *structure)
+{
+  
+}
+
+static void
+gst_play_navigation_init (GstNavigationInterface *iface)
+{
+  iface->send_event = gst_play_navigation_send_event;
+}
+
+static void
+gst_play_set_xwindow_id (GstXOverlay *overlay, XID xwindow_id)
+{
+  
+}
+
+static void
+gst_play_xoverlay_init (GstXOverlayClass *iface)
+{
+  iface->set_xwindow_id = gst_play_set_xwindow_id;
+}
+
+static void
+gst_play_mixer_init (GstMixerClass *klass)
+{
+  klass->list_tracks = NULL;
+  klass->set_volume = NULL;
+  klass->get_volume = NULL;
+  klass->set_mute = NULL;
+  klass->set_record = NULL;
+}
+
+/* =========================================== */
+/*                                             */
+/*         Init & Dispose & Class init         */
+/*                                             */
+/* =========================================== */
+
+static void
+gst_play_dispose (GObject *object)
+{
+  GstPlay *play;
+  
+  g_return_if_fail (object != NULL);
+  g_return_if_fail (GST_IS_PLAY (object));
+  
+  play = GST_PLAY (object);
+    
+  if (play->location)
+    {
+      g_free (play->location);
+      play->location = NULL;
+    }
+  
+  if (play->elements)
+    {
+      g_hash_table_destroy (play->elements);
+      play->elements = NULL;
+    }
+    
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gst_play_init (GstPlay *play)
+{
+  play->location = NULL;
+  play->elements = g_hash_table_new (g_str_hash, g_str_equal);
+  if (!gst_play_pipeline_setup (play))
+    g_warning ("libgstplay: failed initializing pipeline");
+}
+
+static void
+gst_play_class_init (GstPlayClass *klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gobject_class->dispose = gst_play_dispose;
+
+  gst_play_signals[TIME_TICK] =
+    g_signal_new ("time_tick", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GstPlayClass, time_tick), NULL, NULL,
+                  gst_marshal_VOID__INT64, G_TYPE_NONE, 1, G_TYPE_INT64);
+  gst_play_signals[STREAM_LENGTH] =
+    g_signal_new ("stream_length", G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GstPlayClass, stream_length), NULL, NULL,
+                  gst_marshal_VOID__INT64, G_TYPE_NONE, 1, G_TYPE_INT64);
+  gst_play_signals[HAVE_VIDEO_SIZE] =
+    g_signal_new ("have_video_size", G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GstPlayClass, have_video_size), NULL, NULL,
+                  gst_marshal_VOID__INT_INT, G_TYPE_NONE, 2,
+                  G_TYPE_INT, G_TYPE_INT);
+}
+
+/* ======================================================= */
+/*                                                         */
+/*                     Public Methods                      */
+/*                                                         */
+/* ======================================================= */
+
+/**
+ * gst_play_set_location:
+ * @play: a #GstPlay.
+ * @location: a const #char* indicating location to play
+ *
+ * Set location of @play to @location.
+ *
+ * Returns: TRUE if location was set successfully.
+ */
+gboolean
+gst_play_set_location (GstPlay *play, const char *location)
+{
+  g_return_val_if_fail (play != NULL, FALSE);
+  g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
+  
+  if (play->location)
+    g_free (play->location);
+  
+  play->location = g_strdup (location);
+  
+  if (GST_STATE (GST_ELEMENT (play)) != GST_STATE_READY)
+    gst_element_set_state (GST_ELEMENT (play), GST_STATE_READY);
+  
+  return TRUE;
+}
+
+/**
+ * gst_play_get_location:
+ * @play: a #GstPlay.
+ *
+ * Get current location of @play.
+ *
+ * Returns: a const #char* pointer to current location.
+ */
+char *
+gst_play_get_location (GstPlay *play)
+{
+  g_return_val_if_fail (play != NULL, NULL);
+  g_return_val_if_fail (GST_IS_PLAY (play), NULL);
+  return g_strdup (play->location);
+}
+
+/**
+ * gst_play_seek_to_time:
+ * @play: a #GstPlay.
+ * @time_nanos: a #gint64 indicating a time position.
+ *
+ * Performs a seek on @play until @time_nanos.
+ */
+gboolean
+gst_play_seek_to_time (GstPlay * play, gint64 time_nanos)
+{
+  g_return_val_if_fail (play != NULL, FALSE);
+  g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
+  
+  return TRUE;
+}
+
+/* =========================================== */
+/*                                             */
+/*          Object typing & Creation           */
+/*                                             */
+/* =========================================== */
+
+GType
+gst_play_get_type (void)
+{
+  static GType play_type = 0;
+
+  if (!play_type)
+    {
+      static const GTypeInfo play_info = {
+	sizeof (GstPlayClass),
+	NULL,
+	NULL,
+	(GClassInitFunc) gst_play_class_init,
+	NULL,
+        NULL,
+        sizeof (GstPlay),
+	0,
+        (GInstanceInitFunc) gst_play_init,
+	NULL
+      };
+      static const GInterfaceInfo iface_info = {
+        (GInterfaceInitFunc) gst_play_interface_init,
+        NULL,
+        NULL,
+      };
+      static const GInterfaceInfo navigation_info = {
+        (GInterfaceInitFunc) gst_play_navigation_init,
+        NULL,
+        NULL,
+      };
+      static const GInterfaceInfo overlay_info = {
+        (GInterfaceInitFunc) gst_play_xoverlay_init,
+        NULL,
+        NULL,
+      };
+      static const GInterfaceInfo mixer_info = {
+        (GInterfaceInitFunc) gst_play_mixer_init,
+        NULL,
+        NULL,
+      };
+      
+      play_type = g_type_register_static (GST_TYPE_PIPELINE, "GstPlay",
+                                          &play_info, 0);
+      
+      g_type_add_interface_static (play_type, GST_TYPE_INTERFACE,
+                                   &iface_info);
+      g_type_add_interface_static (play_type, GST_TYPE_NAVIGATION,
+                                   &navigation_info);
+      g_type_add_interface_static (play_type, GST_TYPE_X_OVERLAY,
+                                   &overlay_info);
+      g_type_add_interface_static (play_type, GST_TYPE_MIXER,
+                                   &mixer_info);
+    }
+
+  return play_type;
+}
diff --git a/gst-libs/gst/play/play.h b/gst-libs/gst/play/play.h
new file mode 100644
index 00000000..5ddbd812
--- /dev/null
+++ b/gst-libs/gst/play/play.h
@@ -0,0 +1,76 @@
+/* GStreamer
+ * Copyright (C) 2003 Julien Moutte <julien@moutte.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_PLAY_H__
+#define __GST_PLAY_H__
+
+#include <gst/gstpipeline.h>
+
+#define GST_TYPE_PLAY            (gst_play_get_type())
+#define GST_PLAY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PLAY, GstPlay))
+#define GST_PLAY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PLAY, GstPlayClass))
+#define GST_IS_PLAY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PLAY))
+#define GST_IS_PLAY_CLASS(obj)   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PLAY))
+#define GST_PLAY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_PLAY, GstPlayClass))
+
+typedef struct _GstPlay GstPlay;
+typedef struct _GstPlayClass GstPlayClass;
+  
+struct _GstPlay
+{
+  GstPipeline pipeline;
+  
+  char *location;
+  
+  GHashTable *elements;
+  
+  GST_OBJECT_PADDING
+};
+
+struct _GstPlayClass
+{
+  GstPipelineClass parent_class;
+  
+  void (*time_tick)       (GstPlay *play, gint64 time_nanos);
+  void (*stream_length)   (GstPlay *play, gint64 length_nanos);
+  void (*have_video_size) (GstPlay *play, gint width, gint height);
+  
+  GST_CLASS_PADDING
+};
+
+GType                 gst_play_get_type              (void);
+
+gboolean              gst_play_set_video_sink        (GstPlay *play,
+                                                      GstElement *video_sink);
+gboolean              gst_play_set_audio_sink        (GstPlay *play,
+                                                      GstElement *audio_sink);
+
+gboolean              gst_play_set_visualization     (GstPlay *play,
+                                                      GstElement *element);
+gboolean              gst_play_connect_visualization (GstPlay *play,
+                                                      gboolean connect);
+
+gboolean              gst_play_set_location          (GstPlay *play,
+                                                      const char *location);
+char *                gst_play_get_location          (GstPlay *play);
+
+gboolean              gst_play_seek_to_time          (GstPlay *play,
+                                                      gint64 time_nanos);
+
+#endif /* __GST_PLAY_H__ */