--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/gst/playback/gsturidecodebin.c	Thu Dec 17 08:53:32 2009 +0200
@@ -0,0 +1,1633 @@
+/* GStreamer
+ * Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
+ *
+ * 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-uridecodebin
+ * @short_description: decoder for an uri
+ *
+ * Decodes data from a URI into raw media.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <string.h>
+
+#include <gst/gst.h>
+#include <gst/gst-i18n-plugin.h>
+
+#include "gstplay-marshal.h"
+#include "gstplay-enum.h"
+
+#ifdef __SYMBIAN32__
+#include <glib_global.h>
+#endif
+#define GST_TYPE_URI_DECODE_BIN \
+  (gst_uri_decode_bin_get_type())
+#define GST_URI_DECODE_BIN(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_URI_DECODE_BIN,GstURIDecodeBin))
+#define GST_URI_DECODE_BIN_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_URI_DECODE_BIN,GstURIDecodeBinClass))
+#define GST_IS_URI_DECODE_BIN(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_URI_DECODE_BIN))
+#define GST_IS_URI_DECODE_BIN_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_URI_DECODE_BIN))
+
+typedef struct _GstURIDecodeBin GstURIDecodeBin;
+typedef struct _GstURIDecodeBinClass GstURIDecodeBinClass;
+
+struct _GstURIDecodeBin
+{
+  GstBin parent_instance;
+
+  gchar *uri;
+  guint connection_speed;
+  GstCaps *caps;
+  gchar *encoding;
+
+  gboolean is_stream;
+  GstElement *source;
+  GstElement *queue;
+  GSList *decoders;
+  GSList *srcpads;
+  gint numpads;
+
+  /* for dynamic sources */
+  guint src_np_sig_id;          /* new-pad signal id */
+  guint src_nmp_sig_id;         /* no-more-pads signal id */
+  gint pending;
+};
+
+struct _GstURIDecodeBinClass
+{
+  GstBinClass parent_class;
+
+  /* signal fired when we found a pad that we cannot decode */
+  void (*unknown_type) (GstElement * element, GstPad * pad, GstCaps * caps);
+
+  /* signal fired to know if we continue trying to decode the given caps */
+    gboolean (*autoplug_continue) (GstElement * element, GstPad * pad,
+      GstCaps * caps);
+  /* signal fired to get a list of factories to try to autoplug */
+  GValueArray *(*autoplug_factories) (GstElement * element, GstPad * pad,
+      GstCaps * caps);
+  /* signal fired to select from the proposed list of factories */
+    GstAutoplugSelectResult (*autoplug_select) (GstElement * element,
+      GstPad * pad, GstCaps * caps, GValueArray * factories);
+
+  /* emited when all data is decoded */
+  void (*drained) (GstElement * element);
+};
+
+static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src%d",
+    GST_PAD_SRC,
+    GST_PAD_SOMETIMES,
+    GST_STATIC_CAPS_ANY);
+
+GST_DEBUG_CATEGORY_STATIC (gst_uri_decode_bin_debug);
+#define GST_CAT_DEFAULT gst_uri_decode_bin_debug
+
+static const GstElementDetails gst_uri_decode_bin_details =
+GST_ELEMENT_DETAILS ("URI Decoder",
+    "Generic/Bin/Decoder",
+    "Autoplug and decode an URI to raw media",
+    "Wim Taymans <wim.taymans@gmail.com>");
+
+/* signals */
+enum
+{
+  SIGNAL_UNKNOWN_TYPE,
+  SIGNAL_AUTOPLUG_CONTINUE,
+  SIGNAL_AUTOPLUG_FACTORIES,
+  SIGNAL_AUTOPLUG_SELECT,
+  SIGNAL_DRAINED,
+  LAST_SIGNAL
+};
+
+/* properties */
+#define DEFAULT_PROP_URI	    NULL
+#define DEFAULT_CONNECTION_SPEED    0
+#define DEFAULT_CAPS                NULL
+#define DEFAULT_SUBTITLE_ENCODING   NULL
+
+enum
+{
+  PROP_0,
+  PROP_URI,
+  PROP_CONNECTION_SPEED,
+  PROP_CAPS,
+  PROP_SUBTITLE_ENCODING,
+  PROP_LAST
+};
+
+static guint gst_uri_decode_bin_signals[LAST_SIGNAL] = { 0 };
+
+GST_BOILERPLATE (GstURIDecodeBin, gst_uri_decode_bin, GstBin, GST_TYPE_BIN);
+
+static void gst_uri_decode_bin_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_uri_decode_bin_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+static void gst_uri_decode_bin_finalize (GObject * obj);
+
+static void handle_message (GstBin * bin, GstMessage * msg);
+
+static gboolean gst_uri_decode_bin_query (GstElement * element,
+    GstQuery * query);
+static GstStateChangeReturn gst_uri_decode_bin_change_state (GstElement *
+    element, GstStateChange transition);
+
+static void
+gst_uri_decode_bin_base_init (gpointer g_class)
+{
+  GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_add_pad_template (gstelement_class,
+      gst_static_pad_template_get (&srctemplate));
+  gst_element_class_set_details (gstelement_class, &gst_uri_decode_bin_details);
+}
+
+static gboolean
+_gst_boolean_accumulator (GSignalInvocationHint * ihint,
+    GValue * return_accu, const GValue * handler_return, gpointer dummy)
+{
+  gboolean myboolean;
+
+  myboolean = g_value_get_boolean (handler_return);
+  if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
+    g_value_set_boolean (return_accu, myboolean);
+
+  /* stop emission if FALSE */
+  return myboolean;
+}
+
+static gboolean
+_gst_array_accumulator (GSignalInvocationHint * ihint,
+    GValue * return_accu, const GValue * handler_return, gpointer dummy)
+{
+  gpointer array;
+
+  array = g_value_get_boxed (handler_return);
+  if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
+    g_value_set_boxed (return_accu, array);
+
+  return FALSE;
+}
+
+static gboolean
+_gst_select_accumulator (GSignalInvocationHint * ihint,
+    GValue * return_accu, const GValue * handler_return, gpointer dummy)
+{
+  GstAutoplugSelectResult res;
+
+  res = g_value_get_enum (handler_return);
+  if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
+    g_value_set_enum (return_accu, res);
+
+  return FALSE;
+}
+
+static gboolean
+gst_uri_decode_bin_autoplug_continue (GstElement * element, GstPad * pad,
+    GstCaps * caps)
+{
+  /* by default we always continue */
+  return TRUE;
+}
+
+static void
+gst_uri_decode_bin_class_init (GstURIDecodeBinClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBinClass *gstbin_class;
+
+  gobject_class = G_OBJECT_CLASS (klass);
+  gstelement_class = GST_ELEMENT_CLASS (klass);
+  gstbin_class = GST_BIN_CLASS (klass);
+
+  gobject_class->set_property = gst_uri_decode_bin_set_property;
+  gobject_class->get_property = gst_uri_decode_bin_get_property;
+  gobject_class->finalize = gst_uri_decode_bin_finalize;
+
+  g_object_class_install_property (gobject_class, PROP_URI,
+      g_param_spec_string ("uri", "URI", "URI to decode",
+          DEFAULT_PROP_URI, G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class, PROP_CONNECTION_SPEED,
+      g_param_spec_uint ("connection-speed", "Connection Speed",
+          "Network connection speed in kbps (0 = unknown)",
+          0, G_MAXUINT, DEFAULT_CONNECTION_SPEED, G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class, PROP_CAPS,
+      g_param_spec_boxed ("caps", "Caps",
+          "The caps on which to stop decoding. (NULL = default)",
+          GST_TYPE_CAPS, G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class, PROP_SUBTITLE_ENCODING,
+      g_param_spec_string ("subtitle-encoding", "subtitle encoding",
+          "Encoding to assume if input subtitles are not in UTF-8 encoding. "
+          "If not set, the GST_SUBTITLE_ENCODING environment variable will "
+          "be checked for an encoding to use. If that is not set either, "
+          "ISO-8859-15 will be assumed.", NULL, G_PARAM_READWRITE));
+
+  /**
+   * GstURIDecodeBin::unknown-type:
+   * @pad: the new pad containing caps that cannot be resolved to a 'final' stream type.
+   * @caps: the #GstCaps of the pad that cannot be resolved.
+   *
+   * This signal is emitted when a pad for which there is no further possible
+   * decoding is added to the uridecodebin.
+   */
+  gst_uri_decode_bin_signals[SIGNAL_UNKNOWN_TYPE] =
+      g_signal_new ("unknown-type", G_TYPE_FROM_CLASS (klass),
+      G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass, unknown_type),
+      NULL, NULL, gst_marshal_VOID__OBJECT_OBJECT, G_TYPE_NONE, 2,
+      GST_TYPE_PAD, GST_TYPE_CAPS);
+
+  /**
+   * GstURIDecodeBin::autoplug-continue:
+   * @pad: The #GstPad.
+   * @caps: The #GstCaps found.
+   *
+   * This signal is emitted whenever uridecodebin finds a new stream. It is
+   * emitted before looking for any elements that can handle that stream.
+   *
+   * Returns: #TRUE if you wish uridecodebin to look for elements that can
+   * handle the given @caps. If #FALSE, those caps will be considered as
+   * final and the pad will be exposed as such (see 'new-decoded-pad'
+   * signal).
+   */
+  gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE] =
+      g_signal_new ("autoplug-continue", G_TYPE_FROM_CLASS (klass),
+      G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass,
+          autoplug_continue), _gst_boolean_accumulator, NULL,
+      gst_play_marshal_BOOLEAN__OBJECT_OBJECT, G_TYPE_BOOLEAN, 2, GST_TYPE_PAD,
+      GST_TYPE_CAPS);
+
+  /**
+   * GstURIDecodeBin::autoplug-factories:
+   * @pad: The #GstPad.
+   * @caps: The #GstCaps found.
+   *
+   * This function is emited when an array of possible factories for @caps on
+   * @pad is needed. Decodebin2 will by default return 
+   *
+   * Returns: a #GValueArray* with a list of factories to try. The factories are
+   * by default tried in the returned order or based on the index returned by
+   * "autoplug-select".
+   */
+  gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES] =
+      g_signal_new ("autoplug-factories", G_TYPE_FROM_CLASS (klass),
+      G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass,
+          autoplug_factories), _gst_array_accumulator, NULL,
+      gst_play_marshal_BOXED__OBJECT_OBJECT, G_TYPE_VALUE_ARRAY, 2,
+      GST_TYPE_PAD, GST_TYPE_CAPS);
+
+  /**
+   * GstURIDecodeBin::autoplug-select:
+   * @pad: The #GstPad.
+   * @caps: The #GstCaps.
+   * @factories: A #GValueArray of possible #GstElementFactory to use, sorted by
+   * rank (higher ranks come first).
+   *
+   * This signal is emitted once uridecodebin has found all the possible
+   * #GstElementFactory that can be used to handle the given @caps.
+   *
+   * Returns: A #gint indicating what factory index from the @factories array
+   * that you wish uridecodebin to use for trying to decode the given @caps.
+   * -1 to stop selection of a factory. The default handler always
+   * returns the first possible factory.
+   */
+  gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT] =
+      g_signal_new ("autoplug-select", G_TYPE_FROM_CLASS (klass),
+      G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass,
+          autoplug_select), _gst_select_accumulator, NULL,
+      gst_play_marshal_ENUM__OBJECT_OBJECT_OBJECT,
+      GST_TYPE_AUTOPLUG_SELECT_RESULT, 3, GST_TYPE_PAD, GST_TYPE_CAPS,
+      GST_TYPE_ELEMENT_FACTORY);
+
+  /**
+   * GstURIDecodeBin::drained:
+   *
+   * This signal is emitted when the data for the current uri is played.
+   */
+  gst_uri_decode_bin_signals[SIGNAL_DRAINED] =
+      g_signal_new ("drained", G_TYPE_FROM_CLASS (klass),
+      G_SIGNAL_RUN_LAST,
+      G_STRUCT_OFFSET (GstURIDecodeBinClass, drained), NULL, NULL,
+      gst_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
+
+  gstelement_class->query = GST_DEBUG_FUNCPTR (gst_uri_decode_bin_query);
+  gstelement_class->change_state =
+      GST_DEBUG_FUNCPTR (gst_uri_decode_bin_change_state);
+
+  gstbin_class->handle_message = GST_DEBUG_FUNCPTR (handle_message);
+
+  klass->autoplug_continue =
+      GST_DEBUG_FUNCPTR (gst_uri_decode_bin_autoplug_continue);
+}
+
+static void
+gst_uri_decode_bin_init (GstURIDecodeBin * dec, GstURIDecodeBinClass * klass)
+{
+  dec->uri = g_strdup (DEFAULT_PROP_URI);
+  dec->connection_speed = DEFAULT_CONNECTION_SPEED;
+  dec->caps = DEFAULT_CAPS;
+  dec->encoding = g_strdup (DEFAULT_SUBTITLE_ENCODING);
+}
+
+static void
+gst_uri_decode_bin_finalize (GObject * obj)
+{
+  GstURIDecodeBin *dec = GST_URI_DECODE_BIN (obj);
+
+  g_free (dec->uri);
+  g_free (dec->encoding);
+
+  G_OBJECT_CLASS (parent_class)->finalize (obj);
+}
+
+static void
+gst_uri_decode_bin_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstURIDecodeBin *dec = GST_URI_DECODE_BIN (object);
+
+  switch (prop_id) {
+    case PROP_URI:
+      GST_OBJECT_LOCK (dec);
+      g_free (dec->uri);
+      dec->uri = g_value_dup_string (value);
+      GST_OBJECT_UNLOCK (dec);
+      break;
+    case PROP_CONNECTION_SPEED:
+      GST_OBJECT_LOCK (dec);
+      dec->connection_speed = g_value_get_uint (value) * 1000;
+      GST_OBJECT_UNLOCK (dec);
+      break;
+    case PROP_CAPS:
+      GST_OBJECT_LOCK (dec);
+      if (dec->caps)
+        gst_caps_unref (dec->caps);
+      dec->caps = g_value_dup_boxed (value);
+      GST_OBJECT_UNLOCK (dec);
+      break;
+    case PROP_SUBTITLE_ENCODING:
+      GST_OBJECT_LOCK (dec);
+      g_free (dec->encoding);
+      dec->encoding = g_value_dup_string (value);
+      GST_OBJECT_UNLOCK (dec);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_uri_decode_bin_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstURIDecodeBin *dec = GST_URI_DECODE_BIN (object);
+
+  switch (prop_id) {
+    case PROP_URI:
+      GST_OBJECT_LOCK (dec);
+      g_value_set_string (value, dec->uri);
+      GST_OBJECT_UNLOCK (dec);
+      break;
+    case PROP_CONNECTION_SPEED:
+      GST_OBJECT_LOCK (dec);
+      g_value_set_uint (value, dec->connection_speed / 1000);
+      GST_OBJECT_UNLOCK (dec);
+      break;
+    case PROP_CAPS:
+      GST_OBJECT_LOCK (dec);
+      g_value_set_boxed (value, dec->caps);
+      GST_OBJECT_UNLOCK (dec);
+      break;
+    case PROP_SUBTITLE_ENCODING:
+      GST_OBJECT_LOCK (dec);
+      g_value_set_string (value, dec->encoding);
+      GST_OBJECT_UNLOCK (dec);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+#define DEFAULT_QUEUE_SIZE          (3 * GST_SECOND)
+#define DEFAULT_QUEUE_MIN_THRESHOLD ((DEFAULT_QUEUE_SIZE * 30) / 100)
+#define DEFAULT_QUEUE_THRESHOLD     ((DEFAULT_QUEUE_SIZE * 95) / 100)
+
+static void
+unknown_type_cb (GstElement * element, GstPad * pad, GstCaps * caps,
+    GstURIDecodeBin * decoder)
+{
+  gchar *capsstr;
+
+  capsstr = gst_caps_to_string (caps);
+  GST_ELEMENT_WARNING (decoder, STREAM, WRONG_TYPE,
+      (_("No decoder available for type \'%s\'."), capsstr), (NULL));
+  g_free (capsstr);
+}
+
+/* add a streaminfo that indicates that the stream is handled by the
+ * given element. This usually means that a stream without actual data is
+ * produced but one that is sunken by an element. Examples of this are:
+ * cdaudio, a hardware decoder/sink, dvd meta bins etc...
+ */
+static void
+add_element_stream (GstElement * element, GstURIDecodeBin * decoder)
+{
+  g_warning ("add element stream");
+}
+
+/* when the decoder element signals that no more pads will be generated, we
+ * can commit the current group.
+ */
+static void
+no_more_pads_full (GstElement * element, gboolean subs,
+    GstURIDecodeBin * decoder)
+{
+  gboolean final;
+
+  /* setup phase */
+  GST_DEBUG_OBJECT (element, "no more pads, %d pending", decoder->pending);
+
+  GST_OBJECT_LOCK (decoder);
+  final = (decoder->pending == 0);
+
+  /* nothing pending, we can exit */
+  if (final)
+    goto done;
+
+  /* the object has no pending no_more_pads */
+  if (!g_object_get_data (G_OBJECT (element), "pending"))
+    goto done;
+  g_object_set_data (G_OBJECT (element), "pending", NULL);
+
+  decoder->pending--;
+  final = (decoder->pending == 0);
+
+done:
+  GST_OBJECT_UNLOCK (decoder);
+
+  if (final)
+    gst_element_no_more_pads (GST_ELEMENT_CAST (decoder));
+
+  return;
+}
+
+static void
+no_more_pads (GstElement * element, GstURIDecodeBin * decoder)
+{
+  no_more_pads_full (element, FALSE, decoder);
+}
+
+static void
+source_no_more_pads (GstElement * element, GstURIDecodeBin * bin)
+{
+  GST_DEBUG_OBJECT (bin, "No more pads in source element %s.",
+      GST_ELEMENT_NAME (element));
+
+  g_signal_handler_disconnect (G_OBJECT (element), bin->src_np_sig_id);
+  bin->src_np_sig_id = 0;
+  g_signal_handler_disconnect (G_OBJECT (element), bin->src_nmp_sig_id);
+  bin->src_nmp_sig_id = 0;
+
+  no_more_pads_full (element, FALSE, bin);
+}
+
+/* Called by the signal handlers when a decodebin has 
+ * found a new raw pad.  
+ */
+static void
+new_decoded_pad_cb (GstElement * element, GstPad * pad, gboolean last,
+    GstURIDecodeBin * decoder)
+{
+  GstPad *newpad;
+  gchar *padname;
+
+  GST_DEBUG_OBJECT (element, "new decoded pad, name: <%s>. Last: %d",
+      GST_PAD_NAME (pad), last);
+
+  GST_OBJECT_LOCK (decoder);
+  padname = g_strdup_printf ("src%d", decoder->numpads);
+  decoder->numpads++;
+  GST_OBJECT_UNLOCK (decoder);
+
+  newpad = gst_ghost_pad_new (padname, pad);
+  g_free (padname);
+
+  /* store ref to the ghostpad so we can remove it */
+  g_object_set_data (G_OBJECT (pad), "uridecodebin.ghostpad", newpad);
+
+  gst_pad_set_active (newpad, TRUE);
+  gst_element_add_pad (GST_ELEMENT_CAST (decoder), newpad);
+}
+
+static void
+pad_removed_cb (GstElement * element, GstPad * pad, GstURIDecodeBin * decoder)
+{
+  GstPad *ghost;
+
+  GST_DEBUG_OBJECT (element, "pad removed name: <%s:%s>",
+      GST_DEBUG_PAD_NAME (pad));
+
+  if (!(ghost = g_object_get_data (G_OBJECT (pad), "uridecodebin.ghostpad")))
+    goto no_ghost;
+
+  /* unghost the pad */
+  gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (ghost), NULL);
+
+  /* deactivate and remove */
+  gst_pad_set_active (pad, FALSE);
+  gst_element_remove_pad (GST_ELEMENT_CAST (decoder), ghost);
+
+  return;
+
+  /* ERRORS */
+no_ghost:
+  {
+    GST_WARNING_OBJECT (element, "no ghost pad found");
+    return;
+  }
+}
+
+/* helper function to lookup stuff in lists */
+static gboolean
+array_has_value (const gchar * values[], const gchar * value)
+{
+  gint i;
+
+  for (i = 0; values[i]; i++) {
+    if (g_str_has_prefix (value, values[i]))
+      return TRUE;
+  }
+  return FALSE;
+}
+
+/* list of URIs that we consider to be streams and that need buffering.
+ * We have no mechanism yet to figure this out with a query. */
+static const gchar *stream_uris[] = { "http://", "mms://", "mmsh://",
+  "mmsu://", "mmst://", NULL
+};
+
+/* blacklisted URIs, we know they will always fail. */
+static const gchar *blacklisted_uris[] = { NULL };
+
+/* mime types that we don't consider to be media types */
+#if 0
+static const gchar *no_media_mimes[] = {
+  "application/x-executable", "application/x-bzip", "application/x-gzip",
+  "application/zip", "application/x-compress", NULL
+};
+#endif
+
+/* mime types we consider raw media */
+static const gchar *raw_mimes[] = {
+  "audio/x-raw", "video/x-raw", NULL
+};
+
+#define IS_STREAM_URI(uri)          (array_has_value (stream_uris, uri))
+#define IS_BLACKLISTED_URI(uri)     (array_has_value (blacklisted_uris, uri))
+#define IS_NO_MEDIA_MIME(mime)      (array_has_value (no_media_mimes, mime))
+#define IS_RAW_MIME(mime)           (array_has_value (raw_mimes, mime))
+
+/*
+ * Generate and configure a source element.
+ */
+static GstElement *
+gen_source_element (GstURIDecodeBin * decoder)
+{
+  GstElement *source;
+
+  if (!decoder->uri)
+    goto no_uri;
+
+  if (!gst_uri_is_valid (decoder->uri))
+    goto invalid_uri;
+
+  if (IS_BLACKLISTED_URI (decoder->uri))
+    goto uri_blacklisted;
+
+  source = gst_element_make_from_uri (GST_URI_SRC, decoder->uri, "source");
+  if (!source)
+    goto no_source;
+
+  decoder->is_stream = IS_STREAM_URI (decoder->uri);
+
+  /* make HTTP sources send extra headers so we get icecast
+   * metadata in case the stream is an icecast stream */
+  if (!strncmp (decoder->uri, "http://", 7) &&
+      g_object_class_find_property (G_OBJECT_GET_CLASS (source),
+          "iradio-mode")) {
+    g_object_set (source, "iradio-mode", TRUE, NULL);
+  }
+
+  if (g_object_class_find_property (G_OBJECT_GET_CLASS (source),
+          "connection-speed")) {
+    GST_DEBUG_OBJECT (decoder,
+        "setting connection-speed=%d to source element",
+        decoder->connection_speed / 1000);
+    g_object_set (source, "connection-speed",
+        decoder->connection_speed / 1000, NULL);
+  }
+
+  return source;
+
+  /* ERRORS */
+no_uri:
+  {
+    GST_ELEMENT_ERROR (decoder, RESOURCE, NOT_FOUND,
+        (_("No URI specified to play from.")), (NULL));
+    return NULL;
+  }
+invalid_uri:
+  {
+    GST_ELEMENT_ERROR (decoder, RESOURCE, NOT_FOUND,
+        (_("Invalid URI \"%s\"."), decoder->uri), (NULL));
+    return NULL;
+  }
+uri_blacklisted:
+  {
+    GST_ELEMENT_ERROR (decoder, RESOURCE, FAILED,
+        (_("This stream type cannot be played yet.")), (NULL));
+    return NULL;
+  }
+no_source:
+  {
+    gchar *prot = gst_uri_get_protocol (decoder->uri);
+
+    /* whoops, could not create the source element, dig a little deeper to
+     * figure out what might be wrong. */
+    if (prot) {
+      GST_ELEMENT_ERROR (decoder, RESOURCE, FAILED,
+          (_("No URI handler implemented for \"%s\"."), prot), (NULL));
+      g_free (prot);
+    } else
+      goto invalid_uri;
+
+    return NULL;
+  }
+}
+
+/**
+ * has_all_raw_caps:
+ * @pad: a #GstPad
+ * @all_raw: pointer to hold the result
+ *
+ * check if the caps of the pad are all raw. The caps are all raw if
+ * all of its structures contain audio/x-raw or video/x-raw.
+ *
+ * Returns: %FALSE @pad has no caps. Else TRUE and @all_raw set t the result.
+ */
+static gboolean
+has_all_raw_caps (GstPad * pad, gboolean * all_raw)
+{
+  GstCaps *caps;
+  gint capssize;
+  guint i, num_raw = 0;
+  gboolean res = FALSE;
+
+  caps = gst_pad_get_caps (pad);
+  if (caps == NULL)
+    return FALSE;
+
+  capssize = gst_caps_get_size (caps);
+  /* no caps, skip and move to the next pad */
+  if (capssize == 0 || gst_caps_is_empty (caps) || gst_caps_is_any (caps))
+    goto done;
+
+  /* count the number of raw formats in the caps */
+  for (i = 0; i < capssize; ++i) {
+    GstStructure *s;
+    const gchar *mime_type;
+
+    s = gst_caps_get_structure (caps, i);
+    mime_type = gst_structure_get_name (s);
+
+    if (IS_RAW_MIME (mime_type))
+      ++num_raw;
+  }
+
+  *all_raw = (num_raw == capssize);
+  res = TRUE;
+
+done:
+  gst_caps_unref (caps);
+  return res;
+}
+
+/**
+ * analyse_source:
+ * @decoder: a #GstURIDecodeBin
+ * @is_raw: are all pads raw data
+ * @have_out: does the source have output
+ * @is_dynamic: is this a dynamic source
+ *
+ * Check the source of @decoder and collect information about it.
+ *
+ * @is_raw will be set to TRUE if the source only produces raw pads. When this
+ * function returns, all of the raw pad of the source will be added
+ * to @decoder.
+ *
+ * @have_out: will be set to TRUE if the source has output pads.
+ *
+ * @is_dynamic: TRUE if the element will create (more) pads dynamically later
+ * on.
+ *
+ * Returns: FALSE if a fatal error occured while scanning.
+ */
+static gboolean
+analyse_source (GstURIDecodeBin * decoder, gboolean * is_raw,
+    gboolean * have_out, gboolean * is_dynamic)
+{
+  GstIterator *pads_iter;
+  gboolean done = FALSE;
+  gboolean res = TRUE;
+
+  *have_out = FALSE;
+  *is_raw = FALSE;
+  *is_dynamic = FALSE;
+
+  pads_iter = gst_element_iterate_src_pads (decoder->source);
+  while (!done) {
+    GstPad *pad;
+
+    switch (gst_iterator_next (pads_iter, (gpointer) & pad)) {
+      case GST_ITERATOR_ERROR:
+        res = FALSE;
+        /* FALLTROUGH */
+      case GST_ITERATOR_DONE:
+        done = TRUE;
+        break;
+      case GST_ITERATOR_RESYNC:
+        /* reset results and resync */
+        *have_out = FALSE;
+        *is_raw = FALSE;
+        *is_dynamic = FALSE;
+        gst_iterator_resync (pads_iter);
+        break;
+      case GST_ITERATOR_OK:
+        /* we now officially have an ouput pad */
+        *have_out = TRUE;
+
+        /* if FALSE, this pad has no caps and we continue with the next pad. */
+        if (!has_all_raw_caps (pad, is_raw))
+          break;
+
+        /* caps on source pad are all raw, we can add the pad */
+        if (*is_raw)
+          new_decoded_pad_cb (decoder->source, pad, FALSE, decoder);
+        break;
+    }
+  }
+  gst_iterator_free (pads_iter);
+
+  if (!*have_out) {
+    GstElementClass *elemclass;
+    GList *walk;
+
+    /* element has no output pads, check for padtemplates that list SOMETIMES
+     * pads. */
+    elemclass = GST_ELEMENT_GET_CLASS (decoder->source);
+
+    walk = gst_element_class_get_pad_template_list (elemclass);
+    while (walk != NULL) {
+      GstPadTemplate *templ;
+
+      templ = (GstPadTemplate *) walk->data;
+      if (GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) {
+        if (GST_PAD_TEMPLATE_PRESENCE (templ) == GST_PAD_SOMETIMES)
+          *is_dynamic = TRUE;
+        break;
+      }
+      walk = g_list_next (walk);
+    }
+  }
+
+  return res;
+}
+
+static void
+remove_decoders (GstURIDecodeBin * bin)
+{
+  GSList *walk;
+
+  for (walk = bin->decoders; walk; walk = g_slist_next (walk)) {
+    GstElement *decoder = GST_ELEMENT_CAST (walk->data);
+
+    GST_DEBUG_OBJECT (bin, "removing old decoder element");
+    gst_element_set_state (decoder, GST_STATE_NULL);
+    gst_bin_remove (GST_BIN_CAST (bin), decoder);
+  }
+  g_slist_free (bin->decoders);
+  bin->decoders = NULL;
+}
+
+static void
+remove_pads (GstURIDecodeBin * bin)
+{
+  GSList *walk;
+
+  for (walk = bin->srcpads; walk; walk = g_slist_next (walk)) {
+    GstPad *pad = GST_PAD_CAST (walk->data);
+
+    GST_DEBUG_OBJECT (bin, "removing old pad");
+    gst_pad_set_active (pad, FALSE);
+    gst_element_remove_pad (GST_ELEMENT_CAST (bin), pad);
+  }
+  g_slist_free (bin->srcpads);
+  bin->srcpads = NULL;
+}
+
+static void
+proxy_unknown_type_signal (GstElement * element, GstPad * pad, GstCaps * caps,
+    GstURIDecodeBin * dec)
+{
+  GST_DEBUG_OBJECT (dec, "unknown-type signaled");
+
+  g_signal_emit (G_OBJECT (dec),
+      gst_uri_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, pad, caps);
+}
+
+static gboolean
+proxy_autoplug_continue_signal (GstElement * element, GstPad * pad,
+    GstCaps * caps, GstURIDecodeBin * dec)
+{
+  gboolean result;
+
+  g_signal_emit (G_OBJECT (dec),
+      gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE], 0, pad, caps,
+      &result);
+
+  GST_DEBUG_OBJECT (dec, "autoplug-continue returned %d", result);
+
+  return result;
+}
+
+static GValueArray *
+proxy_autoplug_factories_signal (GstElement * element, GstPad * pad,
+    GstCaps * caps, GstURIDecodeBin * dec)
+{
+  GValueArray *result = NULL;
+
+  g_signal_emit (G_OBJECT (dec),
+      gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES], 0, pad, caps,
+      &result);
+
+  GST_DEBUG_OBJECT (dec, "autoplug-factories returned %p", result);
+
+  return result;
+}
+
+static GstAutoplugSelectResult
+proxy_autoplug_select_signal (GstElement * element, GstPad * pad,
+    GstCaps * caps, GstElementFactory * factory, GstURIDecodeBin * dec)
+{
+  GstAutoplugSelectResult result;
+
+  g_signal_emit (G_OBJECT (dec),
+      gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT], 0, pad, caps, factory,
+      &result);
+
+  GST_DEBUG_OBJECT (dec, "autoplug-select returned %d", result);
+
+  return result;
+}
+
+static void
+proxy_drained_signal (GstElement * element, GstURIDecodeBin * dec)
+{
+  GST_DEBUG_OBJECT (dec, "drained signaled");
+
+  g_signal_emit (G_OBJECT (dec),
+      gst_uri_decode_bin_signals[SIGNAL_DRAINED], 0, NULL);
+}
+
+static GstElement *
+make_decoder (GstURIDecodeBin * decoder, gboolean use_queue)
+{
+  GstElement *result, *decodebin;
+
+  /* now create the decoder element */
+  decodebin = gst_element_factory_make ("decodebin2", NULL);
+  if (!decodebin)
+    goto no_decodebin;
+
+  /* connect signals to proxy */
+  g_signal_connect (G_OBJECT (decodebin), "unknown-type",
+      G_CALLBACK (proxy_unknown_type_signal), decoder);
+  g_signal_connect (G_OBJECT (decodebin), "autoplug-continue",
+      G_CALLBACK (proxy_autoplug_continue_signal), decoder);
+  g_signal_connect (G_OBJECT (decodebin), "autoplug-factories",
+      G_CALLBACK (proxy_autoplug_factories_signal), decoder);
+  g_signal_connect (G_OBJECT (decodebin), "autoplug-select",
+      G_CALLBACK (proxy_autoplug_select_signal), decoder);
+  g_signal_connect (G_OBJECT (decodebin), "drained",
+      G_CALLBACK (proxy_drained_signal), decoder);
+
+  if (use_queue) {
+    GstElement *queue;
+    GstPad *gpad, *pad;
+
+    queue = gst_element_factory_make ("queue2", NULL);
+    if (!queue)
+      goto no_queue2;
+
+    /* configure the queue as a buffering element */
+    g_object_set (G_OBJECT (queue), "use-buffering", TRUE, NULL);
+
+    result = gst_bin_new ("source-bin");
+
+    gst_bin_add (GST_BIN_CAST (result), queue);
+    gst_bin_add (GST_BIN_CAST (result), decodebin);
+
+    gst_element_link (queue, decodebin);
+
+    pad = gst_element_get_pad (queue, "sink");
+    gpad = gst_ghost_pad_new (GST_PAD_NAME (pad), pad);
+    gst_object_unref (pad);
+
+    gst_pad_set_active (gpad, TRUE);
+    gst_element_add_pad (GST_ELEMENT_CAST (result), gpad);
+  } else {
+    result = decodebin;
+  }
+
+  /* set up callbacks to create the links between decoded data
+   * and video/audio/subtitle rendering/output. */
+  g_signal_connect (G_OBJECT (decodebin),
+      "new-decoded-pad", G_CALLBACK (new_decoded_pad_cb), decoder);
+  g_signal_connect (G_OBJECT (decodebin),
+      "pad-removed", G_CALLBACK (pad_removed_cb), decoder);
+  g_signal_connect (G_OBJECT (decodebin), "no-more-pads",
+      G_CALLBACK (no_more_pads), decoder);
+  g_signal_connect (G_OBJECT (decodebin),
+      "unknown-type", G_CALLBACK (unknown_type_cb), decoder);
+  g_object_set_data (G_OBJECT (decodebin), "pending", "1");
+  decoder->pending++;
+
+  gst_bin_add (GST_BIN_CAST (decoder), result);
+
+  decoder->decoders = g_slist_prepend (decoder->decoders, result);
+
+  return result;
+
+  /* ERRORS */
+no_decodebin:
+  {
+    GST_ELEMENT_ERROR (decoder, CORE, MISSING_PLUGIN,
+        (_("Could not create \"decodebin2\" element.")), (NULL));
+    return NULL;
+  }
+no_queue2:
+  {
+    GST_ELEMENT_ERROR (decoder, CORE, MISSING_PLUGIN,
+        (_("Could not create \"queue2\" element.")), (NULL));
+    return NULL;
+  }
+}
+
+static void
+remove_source (GstURIDecodeBin * bin)
+{
+  GstElement *source = bin->source;
+
+  if (source) {
+    GST_DEBUG_OBJECT (bin, "removing old src element");
+    gst_element_set_state (source, GST_STATE_NULL);
+    gst_bin_remove (GST_BIN_CAST (bin), source);
+
+    if (bin->src_np_sig_id) {
+      g_signal_handler_disconnect (G_OBJECT (source), bin->src_np_sig_id);
+      bin->src_np_sig_id = 0;
+    }
+    if (bin->src_nmp_sig_id) {
+      g_signal_handler_disconnect (G_OBJECT (source), bin->src_nmp_sig_id);
+      bin->src_nmp_sig_id = 0;
+    }
+    bin->source = NULL;
+  }
+}
+
+/* is called when a dynamic source element created a new pad. */
+static void
+source_new_pad (GstElement * element, GstPad * pad, GstURIDecodeBin * bin)
+{
+  GstElement *decoder;
+  gboolean is_raw;
+
+  GST_DEBUG_OBJECT (bin, "Found new pad %s.%s in source element %s",
+      GST_DEBUG_PAD_NAME (pad), GST_ELEMENT_NAME (element));
+
+  /* if this is a pad with all raw caps, we can expose it */
+  if (has_all_raw_caps (pad, &is_raw) && is_raw) {
+    /* it's all raw, create output pads. */
+    new_decoded_pad_cb (element, pad, FALSE, bin);
+    return;
+  }
+
+  /* not raw, create decoder */
+  decoder = make_decoder (bin, FALSE);
+  if (!decoder)
+    goto no_decodebin;
+
+  /* and link to decoder */
+  if (!gst_element_link (bin->source, decoder))
+    goto could_not_link;
+
+  GST_DEBUG_OBJECT (bin, "linked decoder to new pad");
+
+  gst_element_set_state (decoder, GST_STATE_PLAYING);
+
+  return;
+
+  /* ERRORS */
+no_decodebin:
+  {
+    /* error was posted */
+    return;
+  }
+could_not_link:
+  {
+    GST_ELEMENT_ERROR (bin, CORE, NEGOTIATION,
+        (NULL), ("Can't link source to decoder element"));
+    return;
+  }
+}
+
+/* construct and run the source and decoder elements until we found
+ * all the streams or until a preroll queue has been filled.
+*/
+static gboolean
+setup_source (GstURIDecodeBin * decoder)
+{
+  gboolean is_raw, have_out, is_dynamic;
+
+  GST_DEBUG_OBJECT (decoder, "setup source");
+
+  /* delete old src */
+  remove_source (decoder);
+
+  /* create and configure an element that can handle the uri */
+  if (!(decoder->source = gen_source_element (decoder)))
+    goto no_source;
+
+  /* state will be merged later - if file is not found, error will be
+   * handled by the application right after. */
+  gst_bin_add (GST_BIN_CAST (decoder), decoder->source);
+
+  /* remove the old decoders now, if any */
+  remove_decoders (decoder);
+
+  /* see if the source element emits raw audio/video all by itself,
+   * if so, we can create streams for the pads and be done with it.
+   * Also check that is has source pads, if not, we assume it will
+   * do everything itself.  */
+  if (!analyse_source (decoder, &is_raw, &have_out, &is_dynamic))
+    goto invalid_source;
+
+  if (is_raw) {
+    GST_DEBUG_OBJECT (decoder, "Source provides all raw data");
+    /* source provides raw data, we added the pads and we can now signal a
+     * no_more pads because we are done. */
+    /* FIXME, actually do this... */
+    return TRUE;
+  }
+  if (!have_out && !is_dynamic) {
+    GST_DEBUG_OBJECT (decoder, "Source has no output pads");
+    /* create a stream to indicate that this uri is handled by a self
+     * contained element. We are now done. */
+    add_element_stream (decoder->source, decoder);
+    return TRUE;
+  }
+  if (is_dynamic) {
+    GST_DEBUG_OBJECT (decoder, "Source has dynamic output pads");
+    /* connect a handler for the new-pad signal */
+    decoder->src_np_sig_id =
+        g_signal_connect (G_OBJECT (decoder->source), "pad-added",
+        G_CALLBACK (source_new_pad), decoder);
+    decoder->src_nmp_sig_id =
+        g_signal_connect (G_OBJECT (decoder->source), "no-more-pads",
+        G_CALLBACK (source_no_more_pads), decoder);
+    g_object_set_data (G_OBJECT (decoder->source), "pending", "1");
+    decoder->pending++;
+  } else {
+    GstElement *dec_elem;
+
+    GST_DEBUG_OBJECT (decoder, "Pluggin decodebin to source");
+
+    /* no dynamic source, we can link now */
+    dec_elem = make_decoder (decoder, decoder->is_stream);
+    if (!dec_elem)
+      goto no_decoder;
+
+    if (!gst_element_link (decoder->source, dec_elem))
+      goto could_not_link;
+  }
+  return TRUE;
+
+  /* ERRORS */
+no_source:
+  {
+    /* error message was already posted */
+    return FALSE;
+  }
+invalid_source:
+  {
+    GST_ELEMENT_ERROR (decoder, CORE, FAILED,
+        (_("Source element is invalid.")), (NULL));
+    return FALSE;
+  }
+no_decoder:
+  {
+    /* message was posted */
+    return FALSE;
+  }
+could_not_link:
+  {
+    GST_ELEMENT_ERROR (decoder, CORE, NEGOTIATION,
+        (NULL), ("Can't link source to decoder element"));
+    return FALSE;
+  }
+}
+
+static void
+value_list_append_structure_list (GValue * list_val, GstStructure ** first,
+    GList * structure_list)
+{
+  GList *l;
+
+  for (l = structure_list; l != NULL; l = l->next) {
+    GValue val = { 0, };
+
+    if (*first == NULL)
+      *first = gst_structure_copy ((GstStructure *) l->data);
+
+    g_value_init (&val, GST_TYPE_STRUCTURE);
+    g_value_take_boxed (&val, gst_structure_copy ((GstStructure *) l->data));
+    gst_value_list_append_value (list_val, &val);
+    g_value_unset (&val);
+  }
+}
+
+/* if it's a redirect message with multiple redirect locations we might
+ * want to pick a different 'best' location depending on the required
+ * bitrates and the connection speed */
+static GstMessage *
+handle_redirect_message (GstURIDecodeBin * dec, GstMessage * msg)
+{
+  const GValue *locations_list, *location_val;
+  GstMessage *new_msg;
+  GstStructure *new_structure = NULL;
+  GList *l_good = NULL, *l_neutral = NULL, *l_bad = NULL;
+  GValue new_list = { 0, };
+  guint size, i;
+
+  GST_DEBUG_OBJECT (dec, "redirect message: %" GST_PTR_FORMAT, msg);
+  GST_DEBUG_OBJECT (dec, "connection speed: %u", dec->connection_speed);
+
+  if (dec->connection_speed == 0 || msg->structure == NULL)
+    return msg;
+
+  locations_list = gst_structure_get_value (msg->structure, "locations");
+  if (locations_list == NULL)
+    return msg;
+
+  size = gst_value_list_get_size (locations_list);
+  if (size < 2)
+    return msg;
+
+  /* maintain existing order as much as possible, just sort references
+   * with too high a bitrate to the end (the assumption being that if
+   * bitrates are given they are given for all interesting streams and
+   * that the you-need-at-least-version-xyz redirect has the same bitrate
+   * as the lowest referenced redirect alternative) */
+  for (i = 0; i < size; ++i) {
+    const GstStructure *s;
+    gint bitrate = 0;
+
+    location_val = gst_value_list_get_value (locations_list, i);
+    s = (const GstStructure *) g_value_get_boxed (location_val);
+    if (!gst_structure_get_int (s, "minimum-bitrate", &bitrate) || bitrate <= 0) {
+      GST_DEBUG_OBJECT (dec, "no bitrate: %" GST_PTR_FORMAT, s);
+      l_neutral = g_list_append (l_neutral, (gpointer) s);
+    } else if (bitrate > dec->connection_speed) {
+      GST_DEBUG_OBJECT (dec, "bitrate too high: %" GST_PTR_FORMAT, s);
+      l_bad = g_list_append (l_bad, (gpointer) s);
+    } else if (bitrate <= dec->connection_speed) {
+      GST_DEBUG_OBJECT (dec, "bitrate OK: %" GST_PTR_FORMAT, s);
+      l_good = g_list_append (l_good, (gpointer) s);
+    }
+  }
+
+  g_value_init (&new_list, GST_TYPE_LIST);
+  value_list_append_structure_list (&new_list, &new_structure, l_good);
+  value_list_append_structure_list (&new_list, &new_structure, l_neutral);
+  value_list_append_structure_list (&new_list, &new_structure, l_bad);
+  gst_structure_set_value (new_structure, "locations", &new_list);
+  g_value_unset (&new_list);
+
+  g_list_free (l_good);
+  g_list_free (l_neutral);
+  g_list_free (l_bad);
+
+  new_msg = gst_message_new_element (msg->src, new_structure);
+  gst_message_unref (msg);
+
+  GST_DEBUG_OBJECT (dec, "new redirect message: %" GST_PTR_FORMAT, new_msg);
+  return new_msg;
+}
+
+static void
+handle_message (GstBin * bin, GstMessage * msg)
+{
+  if (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_ELEMENT && msg->structure != NULL
+      && gst_structure_has_name (msg->structure, "redirect")) {
+    /* sort redirect messages based on the connection speed. This simplifies
+     * the user of this element as it can in most cases just pick the first item
+     * of the sorted list as a good redirection candidate. It can of course
+     * choose something else from the list if it has a better way. */
+    msg = handle_redirect_message (GST_URI_DECODE_BIN (bin), msg);
+  }
+  GST_BIN_CLASS (parent_class)->handle_message (bin, msg);
+}
+
+/* generic struct passed to all query fold methods
+ * FIXME, move to core.
+ */
+typedef struct
+{
+  GstQuery *query;
+  gint64 min;
+  gint64 max;
+  gboolean seekable;
+  gboolean live;
+} QueryFold;
+
+typedef void (*QueryInitFunction) (GstURIDecodeBin * dec, QueryFold * fold);
+typedef void (*QueryDoneFunction) (GstURIDecodeBin * dec, QueryFold * fold);
+
+/* for duration/position we collect all durations/positions and take
+ * the MAX of all valid results */
+static void
+decoder_query_init (GstURIDecodeBin * dec, QueryFold * fold)
+{
+  fold->min = 0;
+  fold->max = -1;
+  fold->seekable = TRUE;
+  fold->live = 0;
+}
+
+static gboolean
+decoder_query_duration_fold (GstPad * item, GValue * ret, QueryFold * fold)
+{
+  if (gst_pad_query (item, fold->query)) {
+    gint64 duration;
+
+    g_value_set_boolean (ret, TRUE);
+
+    gst_query_parse_duration (fold->query, NULL, &duration);
+
+    GST_DEBUG_OBJECT (item, "got duration %" G_GINT64_FORMAT, duration);
+
+    if (duration > fold->max)
+      fold->max = duration;
+  }
+  gst_object_unref (item);
+  return TRUE;
+}
+static void
+decoder_query_duration_done (GstURIDecodeBin * dec, QueryFold * fold)
+{
+  GstFormat format;
+
+  gst_query_parse_duration (fold->query, &format, NULL);
+  /* store max in query result */
+  gst_query_set_duration (fold->query, format, fold->max);
+
+  GST_DEBUG ("max duration %" G_GINT64_FORMAT, fold->max);
+}
+
+static gboolean
+decoder_query_position_fold (GstPad * item, GValue * ret, QueryFold * fold)
+{
+  if (gst_pad_query (item, fold->query)) {
+    gint64 position;
+
+    g_value_set_boolean (ret, TRUE);
+
+    gst_query_parse_position (fold->query, NULL, &position);
+
+    GST_DEBUG_OBJECT (item, "got position %" G_GINT64_FORMAT, position);
+
+    if (position > fold->max)
+      fold->max = position;
+  }
+
+  gst_object_unref (item);
+  return TRUE;
+}
+static void
+decoder_query_position_done (GstURIDecodeBin * dec, QueryFold * fold)
+{
+  GstFormat format;
+
+  gst_query_parse_position (fold->query, &format, NULL);
+  /* store max in query result */
+  gst_query_set_position (fold->query, format, fold->max);
+
+  GST_DEBUG_OBJECT (dec, "max position %" G_GINT64_FORMAT, fold->max);
+}
+
+static gboolean
+decoder_query_latency_fold (GstPad * item, GValue * ret, QueryFold * fold)
+{
+  if (gst_pad_query (item, fold->query)) {
+    GstClockTime min, max;
+    gboolean live;
+
+    g_value_set_boolean (ret, TRUE);
+
+    gst_query_parse_latency (fold->query, &live, &min, &max);
+
+    GST_DEBUG_OBJECT (item,
+        "got latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
+        ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
+
+    /* for the combined latency we collect the MAX of all min latencies and
+     * the MIN of all max latencies */
+    if (min > fold->min)
+      fold->min = min;
+    if (fold->max == -1)
+      fold->max = max;
+    else if (max < fold->max)
+      fold->max = max;
+    if (fold->live == FALSE)
+      fold->live = live;
+  }
+
+  gst_object_unref (item);
+  return TRUE;
+}
+static void
+decoder_query_latency_done (GstURIDecodeBin * dec, QueryFold * fold)
+{
+  /* store max in query result */
+  gst_query_set_latency (fold->query, fold->live, fold->min, fold->max);
+
+  GST_DEBUG_OBJECT (dec,
+      "latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
+      ", live %d", GST_TIME_ARGS (fold->min), GST_TIME_ARGS (fold->max),
+      fold->live);
+}
+
+/* we are seekable if all srcpads are seekable */
+static gboolean
+decoder_query_seeking_fold (GstPad * item, GValue * ret, QueryFold * fold)
+{
+  if (gst_pad_query (item, fold->query)) {
+    gboolean seekable;
+
+    g_value_set_boolean (ret, TRUE);
+    gst_query_parse_seeking (fold->query, NULL, &seekable, NULL, NULL);
+
+    GST_DEBUG_OBJECT (item, "got seekable %d", seekable);
+
+    if (fold->seekable == TRUE)
+      fold->seekable = seekable;
+  }
+  gst_object_unref (item);
+
+  return TRUE;
+}
+static void
+decoder_query_seeking_done (GstURIDecodeBin * dec, QueryFold * fold)
+{
+  GstFormat format;
+
+  gst_query_parse_seeking (fold->query, &format, NULL, NULL, NULL);
+  gst_query_set_seeking (fold->query, format, fold->seekable, 0, -1);
+
+  GST_DEBUG_OBJECT (dec, "seekable %d", fold->seekable);
+}
+
+/* generic fold, return first valid result */
+static gboolean
+decoder_query_generic_fold (GstPad * item, GValue * ret, QueryFold * fold)
+{
+  gboolean res;
+
+  if ((res = gst_pad_query (item, fold->query))) {
+    g_value_set_boolean (ret, TRUE);
+    GST_DEBUG_OBJECT (item, "answered query %p", fold->query);
+  }
+
+  gst_object_unref (item);
+
+  /* and stop as soon as we have a valid result */
+  return !res;
+}
+
+
+/* we're a bin, the default query handler iterates sink elements, which we don't
+ * have normally. We should just query all source pads.
+ */
+static gboolean
+gst_uri_decode_bin_query (GstElement * element, GstQuery * query)
+{
+  GstURIDecodeBin *decoder;
+  gboolean res = FALSE;
+  GstIterator *iter;
+  GstIteratorFoldFunction fold_func;
+  QueryInitFunction fold_init = NULL;
+  QueryDoneFunction fold_done = NULL;
+  QueryFold fold_data;
+  GValue ret = { 0 };
+
+  decoder = GST_URI_DECODE_BIN (element);
+
+  switch (GST_QUERY_TYPE (query)) {
+    case GST_QUERY_DURATION:
+      /* iterate and collect durations */
+      fold_func = (GstIteratorFoldFunction) decoder_query_duration_fold;
+      fold_init = decoder_query_init;
+      fold_done = decoder_query_duration_done;
+      break;
+    case GST_QUERY_POSITION:
+      /* iterate and collect durations */
+      fold_func = (GstIteratorFoldFunction) decoder_query_position_fold;
+      fold_init = decoder_query_init;
+      fold_done = decoder_query_position_done;
+      break;
+    case GST_QUERY_LATENCY:
+      /* iterate and collect durations */
+      fold_func = (GstIteratorFoldFunction) decoder_query_latency_fold;
+      fold_init = decoder_query_init;
+      fold_done = decoder_query_latency_done;
+      break;
+    case GST_QUERY_SEEKING:
+      /* iterate and collect durations */
+      fold_func = (GstIteratorFoldFunction) decoder_query_seeking_fold;
+      fold_init = decoder_query_init;
+      fold_done = decoder_query_seeking_done;
+      break;
+    default:
+      fold_func = (GstIteratorFoldFunction) decoder_query_generic_fold;
+      break;
+  }
+
+  fold_data.query = query;
+
+  g_value_init (&ret, G_TYPE_BOOLEAN);
+  g_value_set_boolean (&ret, FALSE);
+
+  iter = gst_element_iterate_src_pads (element);
+  GST_DEBUG_OBJECT (element, "Sending query %p (type %d) to src pads",
+      query, GST_QUERY_TYPE (query));
+
+  if (fold_init)
+    fold_init (decoder, &fold_data);
+
+  while (TRUE) {
+    GstIteratorResult ires;
+
+    ires = gst_iterator_fold (iter, fold_func, &ret, &fold_data);
+
+    switch (ires) {
+      case GST_ITERATOR_RESYNC:
+        gst_iterator_resync (iter);
+        if (fold_init)
+          fold_init (decoder, &fold_data);
+        g_value_set_boolean (&ret, FALSE);
+        break;
+      case GST_ITERATOR_OK:
+      case GST_ITERATOR_DONE:
+        res = g_value_get_boolean (&ret);
+        if (fold_done != NULL && res)
+          fold_done (decoder, &fold_data);
+        goto done;
+      default:
+        res = FALSE;
+        goto done;
+    }
+  }
+done:
+  gst_iterator_free (iter);
+
+  return res;
+}
+
+static GstStateChangeReturn
+gst_uri_decode_bin_change_state (GstElement * element,
+    GstStateChange transition)
+{
+  GstStateChangeReturn ret;
+  GstURIDecodeBin *decoder;
+
+  decoder = GST_URI_DECODE_BIN (element);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      if (!setup_source (decoder))
+        goto source_failed;
+      break;
+    default:
+      break;
+  }
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      GST_DEBUG ("ready to paused");
+      if (ret == GST_STATE_CHANGE_FAILURE)
+        goto setup_failed;
+      break;
+    case GST_STATE_CHANGE_PAUSED_TO_READY:
+      GST_DEBUG ("paused to ready");
+      remove_decoders (decoder);
+      remove_pads (decoder);
+      remove_source (decoder);
+      break;
+    default:
+      break;
+  }
+  return ret;
+
+  /* ERRORS */
+source_failed:
+  {
+    return GST_STATE_CHANGE_FAILURE;
+  }
+setup_failed:
+  {
+    /* clean up leftover groups */
+    return GST_STATE_CHANGE_FAILURE;
+  }
+}
+
+gboolean gst_decode_bin_plugin_init (GstPlugin * plugin);
+
+static gboolean
+gst_uri_decode_bin_plugin_init (GstPlugin * plugin)
+{
+  GST_DEBUG_CATEGORY_INIT (gst_uri_decode_bin_debug, "uridecodebin", 0,
+      "URI decoder element");
+
+#ifdef ENABLE_NLS
+  GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
+      LOCALEDIR);
+  bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
+#endif /* ENABLE_NLS */
+
+  return gst_element_register (plugin, "uridecodebin", GST_RANK_NONE,
+      GST_TYPE_URI_DECODE_BIN);
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  if (!gst_decode_bin_plugin_init (plugin))
+    return FALSE;
+  if (!gst_uri_decode_bin_plugin_init (plugin))
+    return FALSE;
+
+  return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "uridecodebin",
+    "URI Decoder bin", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,
+    GST_PACKAGE_ORIGIN);
+    
+#ifdef __SYMBIAN32__
+EXPORT_C 
+#endif
+GstPluginDesc* _GST_PLUGIN_DESC()
+{
+    return &gst_plugin_desc;
+}