Add a GIO/GVFS plugin with source and sink elements. This will only be enabled when --enable-experimental is given to...

Original commit message from CVS:
Patch by: René Stadler <mail at renestadler dot de>
* configure.ac:
* ext/Makefile.am:
* ext/gio/Makefile.am:
* ext/gio/gstgio.c: (gst_gio_error), (gst_gio_seek),
(gst_gio_get_supported_protocols),
(gst_gio_uri_handler_get_type_sink),
(gst_gio_uri_handler_get_type_src),
(gst_gio_uri_handler_get_protocols), (gst_gio_uri_handler_get_uri),
(gst_gio_uri_handler_set_uri), (gst_gio_uri_handler_init),
(gst_gio_uri_handler_do_init), (plugin_init):
* ext/gio/gstgio.h:
* ext/gio/gstgiosink.c: (gst_gio_sink_base_init),
(gst_gio_sink_class_init), (gst_gio_sink_init),
(gst_gio_sink_finalize), (gst_gio_sink_set_property),
(gst_gio_sink_get_property), (gst_gio_sink_start),
(gst_gio_sink_stop), (gst_gio_sink_unlock),
(gst_gio_sink_unlock_stop), (gst_gio_sink_event),
(gst_gio_sink_render), (gst_gio_sink_query):
* ext/gio/gstgiosink.h:
* ext/gio/gstgiosrc.c: (gst_gio_src_base_init),
(gst_gio_src_class_init), (gst_gio_src_init),
(gst_gio_src_finalize), (gst_gio_src_set_property),
(gst_gio_src_get_property), (gst_gio_src_start),
(gst_gio_src_stop), (gst_gio_src_get_size),
(gst_gio_src_is_seekable), (gst_gio_src_unlock),
(gst_gio_src_unlock_stop), (gst_gio_src_check_get_range),
(gst_gio_src_create):
* ext/gio/gstgiosrc.h:
Add a GIO/GVFS plugin with source and sink elements. This will
only be enabled when --enable-experimental is given to configure
for now as the GIO API is not stable yet. Fixes #476916.

7 files changed, 1206 insertions, 0 deletions

diff --git a/ext/gio/Makefile.am b/ext/gio/Makefile.am
new file mode 100644
index 00000000..15d57449
--- /dev/null
+++ b/ext/gio/Makefile.am
@@ -0,0 +1,13 @@
+# plugindir is set in configure
+
+plugin_LTLIBRARIES = libgstgio.la
+
+# sources used to compile this plug-in
+libgstgio_la_SOURCES = gstgio.c gstgiosink.c gstgiosrc.c
+
+libgstgio_la_CFLAGS = $(GST_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS) $(GIO_CFLAGS)
+libgstgio_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS) $(GIO_LIBS)
+libgstgio_la_LDFLAGS = $(GST_GIO_LDFLAGS)
+
+# headers we need but don't want installed
+noinst_HEADERS = gstgio.h gstgiosink.h gstgiosrc.h
diff --git a/ext/gio/gstgio.c b/ext/gio/gstgio.c
new file mode 100644
index 00000000..3680428c
--- /dev/null
+++ b/ext/gio/gstgio.c
@@ -0,0 +1,217 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Rene Stadler <mail@renestadler.de>
+ * 
+ * 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 "gstgio.h"
+#include "gstgiosink.h"
+#include "gstgiosrc.h"
+
+#include <gio/gvfs.h>
+
+GST_DEBUG_CATEGORY_STATIC (gst_gio_debug);
+#define GST_CAT_DEFAULT gst_gio_debug
+
+/* @func_name: Name of the GIO function, for debugging messages.
+ * @err: Error location.  *err may be NULL, but err must be non-NULL.
+ * @ret: Flow return location.  May be NULL.  Is set to either #GST_FLOW_ERROR
+ * or #GST_FLOW_WRONG_STATE.
+ *
+ * Returns: TRUE to indicate a handled error.  Error at given location err will
+ * be freed and *err will be set to NULL.  A FALSE return indicates an unhandled
+ * error: The err location is unchanged and guaranteed to be != NULL.  ret, if
+ * given, is set to GST_FLOW_ERROR.
+ */
+gboolean
+gst_gio_error (gpointer element, const gchar * func_name, GError ** err,
+    GstFlowReturn * ret)
+{
+  gboolean handled = TRUE;
+
+  if (ret)
+    *ret = GST_FLOW_ERROR;
+
+  if (GST_GIO_ERROR_MATCHES (*err, CANCELLED)) {
+    GST_DEBUG_OBJECT (element, "blocking I/O call cancelled (%s)", func_name);
+    if (ret)
+      *ret = GST_FLOW_WRONG_STATE;
+  } else if (*err != NULL) {
+    handled = FALSE;
+  } else {
+    GST_ELEMENT_ERROR (element, LIBRARY, FAILED, (NULL),
+        ("%s call failed without error set", func_name));
+  }
+
+  if (handled)
+    g_clear_error (err);
+
+  return handled;
+}
+
+GstFlowReturn
+gst_gio_seek (gpointer element, GSeekable * stream, guint64 offset,
+    GCancellable * cancel)
+{
+  gboolean success;
+  GstFlowReturn ret;
+  GError *err = NULL;
+
+  GST_LOG_OBJECT (element, "seeking to offset %" G_GINT64_FORMAT, offset);
+
+  success = g_seekable_seek (stream, offset, G_SEEK_SET, cancel, &err);
+
+  if (success)
+    ret = GST_FLOW_OK;
+  else if (!gst_gio_error (element, "g_seekable_seek", &err, &ret)) {
+    GST_ELEMENT_ERROR (element, RESOURCE, SEEK, (NULL),
+        ("Could not seek: %s", err->message));
+    g_clear_error (&err);
+  }
+
+  return ret;
+}
+
+static gchar **
+gst_gio_get_supported_protocols (void)
+{
+  /* FIXME: Figure out supported schemes enumeration method for GIO. */
+
+  const gchar *protocols[] = { "file", "ftp", "sftp", "smb", NULL };
+
+  return g_strdupv ((gchar **) protocols);
+}
+
+static GstURIType
+gst_gio_uri_handler_get_type_sink (void)
+{
+  return GST_URI_SINK;
+}
+
+static GstURIType
+gst_gio_uri_handler_get_type_src (void)
+{
+  return GST_URI_SRC;
+}
+
+static gchar **
+gst_gio_uri_handler_get_protocols (void)
+{
+  static gchar **protocols = NULL;
+
+  if (!protocols)
+    protocols = gst_gio_get_supported_protocols ();
+
+  return protocols;
+}
+
+static const gchar *
+gst_gio_uri_handler_get_uri (GstURIHandler * handler)
+{
+  GstElement *element = GST_ELEMENT (handler);
+  const gchar *uri;
+
+  g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
+
+  g_object_get (G_OBJECT (element), "location", &uri, NULL);
+
+  return uri;
+}
+
+static gboolean
+gst_gio_uri_handler_set_uri (GstURIHandler * handler, const gchar * uri)
+{
+  GstElement *element = GST_ELEMENT (handler);
+
+  g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
+
+  if (GST_STATE (element) == GST_STATE_PLAYING ||
+      GST_STATE (element) == GST_STATE_PAUSED)
+    return FALSE;
+
+  g_object_set (G_OBJECT (element), "location", uri, NULL);
+
+  return TRUE;
+}
+
+static void
+gst_gio_uri_handler_init (gpointer g_iface, gpointer iface_data)
+{
+  GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
+  gboolean sink = GPOINTER_TO_INT (iface_data); /* See in do_init below. */
+
+  if (sink)
+    iface->get_type = gst_gio_uri_handler_get_type_sink;
+  else
+    iface->get_type = gst_gio_uri_handler_get_type_src;
+  iface->get_protocols = gst_gio_uri_handler_get_protocols;
+  iface->get_uri = gst_gio_uri_handler_get_uri;
+  iface->set_uri = gst_gio_uri_handler_set_uri;
+}
+
+void
+gst_gio_uri_handler_do_init (GType type)
+{
+  GInterfaceInfo uri_handler_info = {
+    gst_gio_uri_handler_init,
+    NULL,
+    NULL
+  };
+
+  /* Store information for uri_handler_init to use for distinguishing the
+   * element types.  This lets us use a single interface implementation for both
+   * classes. */
+  uri_handler_info.interface_data = GINT_TO_POINTER (g_type_is_a (type,
+          GST_TYPE_BASE_SINK));
+
+  g_type_add_interface_static (type, GST_TYPE_URI_HANDLER, &uri_handler_info);
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  gboolean ret = TRUE;
+
+  GST_DEBUG_CATEGORY_INIT (gst_gio_debug, "gio", 0, "GIO elements");
+
+  /* FIXME: This is needed to prevent a crash.  Needs further investigation
+   * probably. */
+  if (g_vfs_get_default () == NULL) {
+    GST_WARNING ("Failed to initialize default VFS, not registering plugin");
+    return FALSE;
+  }
+
+  /* FIXME: Rank is MARGINAL for now, should be at least SECONDARY+1 in the future
+   * to replace gnomevfssink/src. For testing purposes PRIMARY+1 one makes sense
+   * so it gets autoplugged and preferred over filesrc/sink. */
+
+  ret &= gst_element_register (plugin, "giosink", GST_RANK_MARGINAL,
+      GST_TYPE_GIO_SINK);
+
+  ret &= gst_element_register (plugin, "giosrc", GST_RANK_MARGINAL,
+      GST_TYPE_GIO_SRC);
+
+  return ret;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "gio",
+    "GIO elements", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,
+    GST_PACKAGE_ORIGIN)
diff --git a/ext/gio/gstgio.h b/ext/gio/gstgio.h
new file mode 100644
index 00000000..ec6b635a
--- /dev/null
+++ b/ext/gio/gstgio.h
@@ -0,0 +1,40 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Rene Stadler <mail@renestadler.de>
+ * 
+ * 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 __GSTGIO_H__
+#define __GSTGIO_H__
+
+#include <gio/gioerror.h>
+#include <gio/gseekable.h>
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_GIO_ERROR_MATCHES(err, code) g_error_matches (err, G_IO_ERROR, G_IO_ERROR_##code)
+
+gboolean gst_gio_error (gpointer element, const gchar *func_name,
+    GError **err, GstFlowReturn *ret);
+GstFlowReturn gst_gio_seek (gpointer element, GSeekable *stream, guint64 offset,
+    GCancellable *cancel);
+void gst_gio_uri_handler_do_init (GType type);
+
+G_END_DECLS
+
+#endif /* __GSTGIO_H__ */
diff --git a/ext/gio/gstgiosink.c b/ext/gio/gstgiosink.c
new file mode 100644
index 00000000..0b2f65aa
--- /dev/null
+++ b/ext/gio/gstgiosink.c
@@ -0,0 +1,417 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Rene Stadler <mail@renestadler.de>
+ * 
+ * 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-giosink
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * <para>
+ * <programlisting>
+ * gst-launch audiotestsrc num-buffers=100 ! flacenc ! giosink location=file:///home/foo/bar.flac
+ * </programlisting>
+ * </para>
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "gstgiosink.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_gio_sink_debug);
+#define GST_CAT_DEFAULT gst_gio_sink_debug
+
+/* Filter signals and args */
+enum
+{
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0,
+  ARG_LOCATION
+};
+
+static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("ANY")
+    );
+
+GST_BOILERPLATE_FULL (GstGioSink, gst_gio_sink, GstBaseSink, GST_TYPE_BASE_SINK,
+    gst_gio_uri_handler_do_init);
+
+static void gst_gio_sink_finalize (GObject * object);
+static void gst_gio_sink_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_gio_sink_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+static gboolean gst_gio_sink_start (GstBaseSink * base_sink);
+static gboolean gst_gio_sink_stop (GstBaseSink * base_sink);
+static gboolean gst_gio_sink_unlock (GstBaseSink * base_sink);
+static gboolean gst_gio_sink_unlock_stop (GstBaseSink * base_sink);
+static gboolean gst_gio_sink_event (GstBaseSink * base_sink, GstEvent * event);
+static GstFlowReturn gst_gio_sink_render (GstBaseSink * base_sink,
+    GstBuffer * buffer);
+static gboolean gst_gio_sink_query (GstPad * pad, GstQuery * query);
+
+static void
+gst_gio_sink_base_init (gpointer gclass)
+{
+  static GstElementDetails element_details = {
+    "GIO sink",
+    "Sink/File",
+    "Write to any GVFS-supported location",
+    "Ren\xc3\xa9 Stadler <mail@renestadler.de>"
+  };
+  GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+  GST_DEBUG_CATEGORY_INIT (gst_gio_sink_debug, "giosink", 0, "GIO source");
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&sink_factory));
+  gst_element_class_set_details (element_class, &element_details);
+}
+
+static void
+gst_gio_sink_class_init (GstGioSinkClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBaseSinkClass *gstbasesink_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  gstbasesink_class = (GstBaseSinkClass *) klass;
+
+  gobject_class->finalize = gst_gio_sink_finalize;
+  gobject_class->set_property = gst_gio_sink_set_property;
+  gobject_class->get_property = gst_gio_sink_get_property;
+
+  g_object_class_install_property (gobject_class, ARG_LOCATION,
+      g_param_spec_string ("location", "Location", "URI location to write to",
+          NULL, G_PARAM_READWRITE));
+
+  gstbasesink_class->start = GST_DEBUG_FUNCPTR (gst_gio_sink_start);
+  gstbasesink_class->stop = GST_DEBUG_FUNCPTR (gst_gio_sink_stop);
+  gstbasesink_class->unlock = GST_DEBUG_FUNCPTR (gst_gio_sink_unlock);
+  gstbasesink_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_gio_sink_unlock_stop);
+  gstbasesink_class->event = GST_DEBUG_FUNCPTR (gst_gio_sink_event);
+  gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_gio_sink_render);
+}
+
+static void
+gst_gio_sink_init (GstGioSink * sink, GstGioSinkClass * gclass)
+{
+  gst_pad_set_query_function (GST_BASE_SINK_PAD (sink),
+      GST_DEBUG_FUNCPTR (gst_gio_sink_query));
+
+  GST_BASE_SINK (sink)->sync = FALSE;
+
+  sink->cancel = g_cancellable_new ();
+}
+
+static void
+gst_gio_sink_finalize (GObject * object)
+{
+  GstGioSink *sink = GST_GIO_SINK (object);
+
+  g_object_unref (sink->cancel);
+
+  if (sink->file)
+    g_object_unref (sink->file);
+
+  g_free (sink->location);
+
+  GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
+}
+
+static void
+gst_gio_sink_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstGioSink *sink = GST_GIO_SINK (object);
+
+  switch (prop_id) {
+    case ARG_LOCATION:
+      g_free (sink->location);
+      sink->location = g_strdup (g_value_get_string (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_gio_sink_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstGioSink *sink = GST_GIO_SINK (object);
+
+  switch (prop_id) {
+    case ARG_LOCATION:
+      g_value_set_string (value, sink->location);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static gboolean
+gst_gio_sink_start (GstBaseSink * base_sink)
+{
+  GstGioSink *sink = GST_GIO_SINK (base_sink);
+  gboolean success;
+  GError *err = NULL;
+
+  if (sink->location == NULL) {
+    GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, (NULL),
+        ("No location given"));
+    return FALSE;
+  }
+
+  sink->file = g_file_new_for_uri (sink->location);
+
+  if (sink->file == NULL) {
+    GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, (NULL),
+        ("Malformed URI or protocol not supported (%s)", sink->location));
+    return FALSE;
+  }
+
+  sink->stream = g_file_create (sink->file, sink->cancel, &err);
+  success = (sink->stream != NULL);
+
+  if (!success && !gst_gio_error (sink, "g_file_create", &err, NULL)) {
+
+    /*if (GST_GIO_ERROR_MATCHES (err, EXISTS)) */
+    /* FIXME: Retry with replace if overwrite == TRUE! */
+
+    if (GST_GIO_ERROR_MATCHES (err, NOT_FOUND))
+      GST_ELEMENT_ERROR (sink, RESOURCE, NOT_FOUND, (NULL),
+          ("Could not open location %s for writing: %s",
+              sink->location, err->message));
+    else
+      GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_READ, (NULL),
+          ("Could not open location %s for writing: %s",
+              sink->location, err->message));
+
+    g_clear_error (&err);
+  }
+
+  if (!success) {
+    g_object_unref (sink->file);
+    sink->file = NULL;
+
+    return FALSE;
+  }
+
+  sink->position = 0;
+
+  GST_DEBUG_OBJECT (sink, "opened location %s", sink->location);
+
+  return TRUE;
+}
+
+static gboolean
+gst_gio_sink_stop (GstBaseSink * base_sink)
+{
+  GstGioSink *sink = GST_GIO_SINK (base_sink);
+  gboolean success = TRUE;
+  GError *err = NULL;
+
+  if (sink->file != NULL) {
+    g_object_unref (sink->file);
+    sink->file = NULL;
+  }
+
+  if (sink->stream != NULL) {
+    /* FIXME: In case that the call below would block, there is no one to
+     * trigger the cancellation! */
+
+    success = g_output_stream_close (G_OUTPUT_STREAM (sink->stream),
+        sink->cancel, &err);
+
+    if (success) {
+      GST_DEBUG_OBJECT (sink, "closed location %s", sink->location);
+    } else if (!gst_gio_error (sink, "g_output_stream_close", &err, NULL)) {
+      GST_ELEMENT_ERROR (sink, RESOURCE, CLOSE, (NULL),
+          ("g_output_stream_close failed: %s", err->message));
+      g_clear_error (&err);
+    }
+
+    g_object_unref (sink->stream);
+    sink->stream = NULL;
+  }
+
+  return success;
+}
+
+static gboolean
+gst_gio_sink_unlock (GstBaseSink * base_sink)
+{
+  GstGioSink *sink = GST_GIO_SINK (base_sink);
+
+  GST_LOG_OBJECT (sink, "triggering cancellation");
+
+  g_cancellable_cancel (sink->cancel);
+
+  return TRUE;
+}
+
+static gboolean
+gst_gio_sink_unlock_stop (GstBaseSink * base_sink)
+{
+  GstGioSink *sink = GST_GIO_SINK (base_sink);
+
+  GST_LOG_OBJECT (sink, "restoring cancellable");
+
+  g_object_unref (sink->cancel);
+  sink->cancel = g_cancellable_new ();
+
+  return TRUE;
+}
+
+static gboolean
+gst_gio_sink_event (GstBaseSink * base_sink, GstEvent * event)
+{
+  GstGioSink *sink = GST_GIO_SINK (base_sink);
+  GstFlowReturn ret = GST_FLOW_OK;
+
+  if (sink->stream == NULL)
+    return TRUE;
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_NEWSEGMENT:
+    {
+      GstFormat format;
+      gint64 offset;
+
+      gst_event_parse_new_segment (event, NULL, NULL, &format, &offset, NULL,
+          NULL);
+
+      if (format != GST_FORMAT_BYTES) {
+        GST_WARNING_OBJECT (sink, "ignored NEWSEGMENT event in %s format",
+            gst_format_get_name (format));
+        break;
+      }
+
+      ret = gst_gio_seek (sink, G_SEEKABLE (sink->stream), offset,
+          sink->cancel);
+
+      if (ret == GST_FLOW_OK)
+        sink->position = offset;
+    }
+      break;
+
+    case GST_EVENT_EOS:
+    case GST_EVENT_FLUSH_START:
+    {
+      gboolean success;
+      GError *err = NULL;
+
+      success = g_output_stream_flush (G_OUTPUT_STREAM (sink->stream),
+          sink->cancel, &err);
+
+      if (!success && !gst_gio_error (sink, "g_output_stream_flush", &err,
+              &ret)) {
+        GST_ELEMENT_ERROR (sink, RESOURCE, WRITE, (NULL),
+            ("flush failed: %s", err->message));
+        g_clear_error (&err);
+      }
+    }
+      break;
+
+    default:
+      break;
+  }
+
+  return (ret == GST_FLOW_OK);
+}
+
+static GstFlowReturn
+gst_gio_sink_render (GstBaseSink * base_sink, GstBuffer * buffer)
+{
+  GstGioSink *sink = GST_GIO_SINK (base_sink);
+  gssize written;
+  gboolean success;
+  GError *err = NULL;
+
+  GST_LOG_OBJECT (sink, "writing %u bytes to offset %" G_GUINT64_FORMAT,
+      GST_BUFFER_SIZE (buffer), sink->position);
+
+  written = g_output_stream_write (G_OUTPUT_STREAM (sink->stream),
+      GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer), sink->cancel, &err);
+
+  success = (written >= 0);
+
+  if (G_UNLIKELY (success && written < GST_BUFFER_SIZE (buffer))) {
+    /* FIXME: Can this happen?  Should we handle it gracefully?  gnomevfssink
+     * doesn't... */
+    GST_ELEMENT_ERROR (sink, RESOURCE, WRITE, (NULL),
+        ("Could not write to location %s: (short write)", sink->location));
+    return GST_FLOW_ERROR;
+  }
+
+  if (success) {
+    sink->position += written;
+    return GST_FLOW_OK;
+
+  } else {
+    GstFlowReturn ret;
+
+    if (!gst_gio_error (sink, "g_output_stream_write", &err, &ret)) {
+      GST_ELEMENT_ERROR (sink, RESOURCE, WRITE, (NULL),
+          ("Could not write to location %s: %s", sink->location, err->message));
+      g_clear_error (&err);
+    }
+
+    return ret;
+  }
+}
+
+static gboolean
+gst_gio_sink_query (GstPad * pad, GstQuery * query)
+{
+  GstGioSink *sink = GST_GIO_SINK (GST_PAD_PARENT (pad));
+  GstFormat format;
+
+  switch (GST_QUERY_TYPE (query)) {
+    case GST_QUERY_POSITION:
+      gst_query_parse_position (query, &format, NULL);
+      switch (format) {
+        case GST_FORMAT_BYTES:
+        case GST_FORMAT_DEFAULT:
+          gst_query_set_position (query, GST_FORMAT_BYTES, sink->position);
+          return TRUE;
+        default:
+          return FALSE;
+      }
+    case GST_QUERY_FORMATS:
+      gst_query_set_formats (query, 2, GST_FORMAT_DEFAULT, GST_FORMAT_BYTES);
+      return TRUE;
+    default:
+      return gst_pad_query_default (pad, query);
+  }
+}
diff --git a/ext/gio/gstgiosink.h b/ext/gio/gstgiosink.h
new file mode 100644
index 00000000..6d4de8d6
--- /dev/null
+++ b/ext/gio/gstgiosink.h
@@ -0,0 +1,65 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Rene Stadler <mail@renestadler.de>
+ * 
+ * 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 __GSTGIOSINK_H__
+#define __GSTGIOSINK_H__
+
+#include "gstgio.h"
+
+#include <gio/gfile.h>
+#include <gst/base/gstbasesink.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_GIO_SINK \
+  (gst_gio_sink_get_type())
+#define GST_GIO_SINK(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GIO_SINK,GstGioSink))
+#define GST_GIO_SINK_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GIO_SINK,GstGioSinkClass))
+#define GST_IS_GIO_SINK(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GIO_SINK))
+#define GST_IS_GIO_SINK_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GIO_SINK))
+
+typedef struct _GstGioSink      GstGioSink;
+typedef struct _GstGioSinkClass GstGioSinkClass;
+
+struct _GstGioSink
+{
+  GstBaseSink sink;
+
+  GCancellable *cancel;
+  GFile *file;
+  gchar *location;
+  guint64 position;
+  GFileOutputStream *stream;
+};
+
+struct _GstGioSinkClass 
+{
+  GstBaseSinkClass parent_class;
+};
+
+GType gst_gio_sink_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GSTGIOSINK_H__ */
diff --git a/ext/gio/gstgiosrc.c b/ext/gio/gstgiosrc.c
new file mode 100644
index 00000000..8fe1a988
--- /dev/null
+++ b/ext/gio/gstgiosrc.c
@@ -0,0 +1,389 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Rene Stadler <mail@renestadler.de>
+ * 
+ * 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-giosrc
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * <para>
+ * <programlisting>
+ * gst-launch giosrc location=file:///home/foo/bar.ext ! fakesink
+ * </programlisting>
+ * </para>
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "gstgiosrc.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_gio_src_debug);
+#define GST_CAT_DEFAULT gst_gio_src_debug
+
+enum
+{
+  ARG_0,
+  ARG_LOCATION
+};
+
+static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("ANY")
+    );
+
+GST_BOILERPLATE_FULL (GstGioSrc, gst_gio_src, GstBaseSrc, GST_TYPE_BASE_SRC,
+    gst_gio_uri_handler_do_init);
+
+static void gst_gio_src_finalize (GObject * object);
+static void gst_gio_src_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_gio_src_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+static gboolean gst_gio_src_start (GstBaseSrc * base_src);
+static gboolean gst_gio_src_stop (GstBaseSrc * base_src);
+static gboolean gst_gio_src_get_size (GstBaseSrc * base_src, guint64 * size);
+static gboolean gst_gio_src_is_seekable (GstBaseSrc * base_src);
+static gboolean gst_gio_src_unlock (GstBaseSrc * base_src);
+static gboolean gst_gio_src_unlock_stop (GstBaseSrc * base_src);
+static gboolean gst_gio_src_check_get_range (GstBaseSrc * base_src);
+static GstFlowReturn gst_gio_src_create (GstBaseSrc * base_src, guint64 offset,
+    guint size, GstBuffer ** buf);
+
+static void
+gst_gio_src_base_init (gpointer gclass)
+{
+  static GstElementDetails element_details = {
+    "GIO source",
+    "Source/File",
+    "Read from any GVFS-supported location",
+    "Ren\xc3\xa9 Stadler <mail@renestadler.de>"
+  };
+  GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+  GST_DEBUG_CATEGORY_INIT (gst_gio_src_debug, "giosrc", 0, "GIO source");
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_factory));
+  gst_element_class_set_details (element_class, &element_details);
+}
+
+static void
+gst_gio_src_class_init (GstGioSrcClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBaseSrcClass *gstbasesrc_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  gstbasesrc_class = (GstBaseSrcClass *) klass;
+
+  gobject_class->finalize = gst_gio_src_finalize;
+  gobject_class->set_property = gst_gio_src_set_property;
+  gobject_class->get_property = gst_gio_src_get_property;
+
+  g_object_class_install_property (gobject_class, ARG_LOCATION,
+      g_param_spec_string ("location", "Location", "URI location to read from",
+          NULL, G_PARAM_READWRITE));
+
+  gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_gio_src_start);
+  gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_gio_src_stop);
+  gstbasesrc_class->get_size = GST_DEBUG_FUNCPTR (gst_gio_src_get_size);
+  gstbasesrc_class->is_seekable = GST_DEBUG_FUNCPTR (gst_gio_src_is_seekable);
+  gstbasesrc_class->unlock = GST_DEBUG_FUNCPTR (gst_gio_src_unlock);
+  gstbasesrc_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_gio_src_unlock_stop);
+  gstbasesrc_class->check_get_range =
+      GST_DEBUG_FUNCPTR (gst_gio_src_check_get_range);
+  gstbasesrc_class->create = GST_DEBUG_FUNCPTR (gst_gio_src_create);
+}
+
+static void
+gst_gio_src_init (GstGioSrc * src, GstGioSrcClass * gclass)
+{
+  src->cancel = g_cancellable_new ();
+}
+
+static void
+gst_gio_src_finalize (GObject * object)
+{
+  GstGioSrc *src = GST_GIO_SRC (object);
+
+  g_object_unref (src->cancel);
+
+  if (src->file)
+    g_object_unref (src->file);
+
+  g_free (src->location);
+
+  GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
+}
+
+static void
+gst_gio_src_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstGioSrc *src = GST_GIO_SRC (object);
+
+  switch (prop_id) {
+    case ARG_LOCATION:
+      g_free (src->location);
+      src->location = g_strdup (g_value_get_string (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_gio_src_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstGioSrc *src = GST_GIO_SRC (object);
+
+  switch (prop_id) {
+    case ARG_LOCATION:
+      g_value_set_string (value, src->location);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static gboolean
+gst_gio_src_start (GstBaseSrc * base_src)
+{
+  GstGioSrc *src = GST_GIO_SRC (base_src);
+  GError *err = NULL;
+
+  if (src->location == NULL) {
+    GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), ("No location given"));
+    return FALSE;
+  }
+
+  src->file = g_file_new_for_uri (src->location);
+
+  if (src->file == NULL) {
+    GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
+        ("Malformed URI or protocol not supported (%s)", src->location));
+    return FALSE;
+  }
+
+  src->stream = g_file_read (src->file, src->cancel, &err);
+
+  if (src->stream == NULL && !gst_gio_error (src, "g_file_read", &err, NULL)) {
+
+    if (GST_GIO_ERROR_MATCHES (err, NOT_FOUND))
+      GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL),
+          ("Could not open location %s for reading: %s",
+              src->location, err->message));
+    else
+      GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
+          ("Could not open location %s for reading: %s",
+              src->location, err->message));
+
+    g_clear_error (&err);
+
+    g_object_unref (src->file);
+    src->file = NULL;
+
+    return FALSE;
+
+  } else if (src->stream == NULL)
+    return FALSE;
+
+  src->position = 0;
+
+  GST_DEBUG_OBJECT (src, "opened location %s", src->location);
+
+  return TRUE;
+}
+
+static gboolean
+gst_gio_src_stop (GstBaseSrc * base_src)
+{
+  GstGioSrc *src = GST_GIO_SRC (base_src);
+  gboolean success = TRUE;
+  GError *err = NULL;
+
+  if (src->stream != NULL) {
+    /* FIXME: In case that the call below would block, there is no one to
+     * trigger the cancellation! */
+
+    success = g_input_stream_close (G_INPUT_STREAM (src->stream), src->cancel,
+        &err);
+
+    if (!success && !gst_gio_error (src, "g_input_stream_close", &err, NULL)) {
+      GST_ELEMENT_ERROR (src, RESOURCE, CLOSE, (NULL),
+          ("g_input_stream_close failed: %s", err->message));
+      g_clear_error (&err);
+    }
+
+    g_object_unref (src->stream);
+    src->stream = NULL;
+  }
+
+  if (src->file != NULL) {
+    g_object_unref (src->file);
+    src->file = NULL;
+  }
+
+  GST_DEBUG_OBJECT (src, "closed location %s", src->location);
+
+  return success;
+}
+
+static gboolean
+gst_gio_src_get_size (GstBaseSrc * base_src, guint64 * size)
+{
+  GstGioSrc *src = GST_GIO_SRC (base_src);
+  GFileInfo *info;
+  GError *err = NULL;
+
+  info = g_file_input_stream_query_info (src->stream,
+      G_FILE_ATTRIBUTE_STD_SIZE, src->cancel, &err);
+
+  if (info != NULL) {
+    *size = g_file_info_get_size (info);
+    g_object_unref (info);
+    GST_DEBUG_OBJECT (src, "found size: %" G_GUINT64_FORMAT, *size);
+    return TRUE;
+  }
+
+  if (!gst_gio_error (src, "g_file_input_stream_query_info", &err, NULL)) {
+
+    if (GST_GIO_ERROR_MATCHES (err, NOT_SUPPORTED))
+      GST_DEBUG_OBJECT (src, "size information not available");
+    else
+      GST_WARNING_OBJECT (src, "size information retrieval failed: %s",
+          err->message);
+
+    g_clear_error (&err);
+  }
+
+  return FALSE;
+}
+
+static gboolean
+gst_gio_src_is_seekable (GstBaseSrc * base_src)
+{
+  GstGioSrc *src = GST_GIO_SRC (base_src);
+  gboolean seekable;
+
+  seekable = g_seekable_can_seek (G_SEEKABLE (src->stream));
+
+  GST_DEBUG_OBJECT (src, "can seek: %d", seekable);
+
+  return seekable;
+}
+
+static gboolean
+gst_gio_src_unlock (GstBaseSrc * base_src)
+{
+  GstGioSrc *src = GST_GIO_SRC (base_src);
+
+  GST_LOG_OBJECT (src, "triggering cancellation");
+
+  g_cancellable_cancel (src->cancel);
+
+  return TRUE;
+}
+
+static gboolean
+gst_gio_src_unlock_stop (GstBaseSrc * base_src)
+{
+  GstGioSrc *src = GST_GIO_SRC (base_src);
+
+  GST_LOG_OBJECT (src, "restoring cancellable");
+
+  g_object_unref (src->cancel);
+  src->cancel = g_cancellable_new ();
+
+  return TRUE;
+}
+
+static gboolean
+gst_gio_src_check_get_range (GstBaseSrc * base_src)
+{
+  /* FIXME: Implement dry-run variant using guesswork like gnomevfssrc? */
+
+  return GST_CALL_PARENT_WITH_DEFAULT (GST_BASE_SRC_CLASS,
+      check_get_range, (base_src), FALSE);
+}
+
+static GstFlowReturn
+gst_gio_src_create (GstBaseSrc * base_src, guint64 offset, guint size,
+    GstBuffer ** buf_return)
+{
+  GstGioSrc *src = GST_GIO_SRC (base_src);
+  GstBuffer *buf;
+  gssize read;
+  gboolean success, eos;
+  GstFlowReturn ret = GST_FLOW_OK;
+  GError *err = NULL;
+
+  if (G_UNLIKELY (offset != src->position)) {
+
+    ret = gst_gio_seek (src, G_SEEKABLE (src->stream), offset, src->cancel);
+
+    if (ret == GST_FLOW_OK)
+      src->position = offset;
+    else
+      return ret;
+  }
+
+  buf = gst_buffer_new_and_alloc (size);
+
+  GST_LOG_OBJECT (src, "reading %u bytes from offset %" G_GUINT64_FORMAT,
+      size, offset);
+
+  read =
+      g_input_stream_read (G_INPUT_STREAM (src->stream), GST_BUFFER_DATA (buf),
+      size, src->cancel, &err);
+
+  success = (read >= 0);
+  eos = (size > 0 && read == 0);
+
+  if (!success && !gst_gio_error (src, "g_input_stream_read", &err, &ret)) {
+    GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
+        ("Could not read from location %s: %s", src->location, err->message));
+    g_clear_error (&err);
+  }
+
+  if (success && !eos) {
+    src->position += read;
+    GST_BUFFER_OFFSET (buf) = offset;
+    GST_BUFFER_SIZE (buf) = read;
+    *buf_return = buf;
+  } else {
+    /* !success || eos */
+    gst_buffer_unref (buf);
+  }
+
+  if (eos)
+    ret = GST_FLOW_UNEXPECTED;
+
+  return ret;
+}
diff --git a/ext/gio/gstgiosrc.h b/ext/gio/gstgiosrc.h
new file mode 100644
index 00000000..d8b64af4
--- /dev/null
+++ b/ext/gio/gstgiosrc.h
@@ -0,0 +1,65 @@
+/* GStreamer
+ *
+ * Copyright (C) 2007 Rene Stadler <mail@renestadler.de>
+ * 
+ * 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 __GSTGIOSRC_H__
+#define __GSTGIOSRC_H__
+
+#include "gstgio.h"
+
+#include <gio/gfile.h>
+#include <gst/base/gstbasesrc.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_GIO_SRC \
+  (gst_gio_src_get_type())
+#define GST_GIO_SRC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GIO_SRC,GstGioSrc))
+#define GST_GIO_SRC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GIO_SRC,GstGioSrcClass))
+#define GST_IS_GIO_SRC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GIO_SRC))
+#define GST_IS_GIO_SRC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GIO_SRC))
+
+typedef struct _GstGioSrc      GstGioSrc;
+typedef struct _GstGioSrcClass GstGioSrcClass;
+
+struct _GstGioSrc
+{
+  GstBaseSrc src;
+
+  GCancellable *cancel;
+  GFile *file;
+  gchar *location;
+  guint64 position;
+  GFileInputStream *stream;
+};
+
+struct _GstGioSrcClass 
+{
+  GstBaseSrcClass parent_class;
+};
+
+GType gst_gio_src_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GSTGIOSRC_H__ */