diff -r 567bb019e3e3 -r 7e817e7e631c gst_plugins_base/ext/pango/gstclockoverlay.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/ext/pango/gstclockoverlay.c	Wed Sep 01 12:16:41 2010 +0100
@@ -0,0 +1,161 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2005> Tim-Philipp Müller <tim@centricular.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * SECTION:element-clockoverlay
+ * @see_also: #GstTextOverlay, #GstTimeOverlay
+ *
+ * <refsect2>
+ * <para>
+ * This element overlays the current clock time on top of a video
+ * stream. You can position the text and configure the font details
+ * using the properties of the #GstTextOverlay class. By default, the
+ * time is displayed in the top left corner of the picture, with some
+ * padding to the left and to the top.
+ * </para>
+ * <para>
+ * Here is a simple pipeline that displays the current time in the top left
+ * corner of the video picture:
+ * <programlisting>
+ * gst-launch -v videotestsrc ! clockoverlay ! xvimagesink
+ * </programlisting>
+ * </para>
+ * <para>
+ * Here is another pipeline that displays the current time with some leading
+ * text in the bottom right corner of the video picture, with the background
+ * of the text being shaded in order to make it more legible on top of a
+ * bright video background:
+ * <programlisting>
+ * gst-launch -v videotestsrc ! clockoverlay halign=right valign=bottom text="Edge City" shaded-background=true ! ffmpegcolorspace ! ximagesink
+ * </programlisting>
+ * </para>
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gstclockoverlay.h>
+#include <gst/video/video.h>
+#include <time.h>
+
+static const GstElementDetails clock_overlay_details =
+GST_ELEMENT_DETAILS ("Clock overlay",
+    "Filter/Editor/Video",
+    "Overlays the current clock time on a video stream",
+    "Tim-Philipp Müller <tim@centricular.net>");
+
+GST_BOILERPLATE (GstClockOverlay, gst_clock_overlay, GstTextOverlay,
+    GST_TYPE_TEXT_OVERLAY)
+
+     static void gst_clock_overlay_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_set_details (element_class, &clock_overlay_details);
+}
+
+static gchar *
+gst_clock_overlay_render_time (GstClockOverlay * overlay)
+{
+  struct tm *t;
+  time_t now;
+
+#ifdef HAVE_LOCALTIME_R
+  struct tm dummy;
+#endif
+
+  now = time (NULL);
+
+#ifdef HAVE_LOCALTIME_R
+  t = localtime_r (&now, &dummy);
+#else
+  /* on win32 this apparently returns a per-thread struct which would be fine */
+  t = localtime (&now);
+#endif
+
+  if (t == NULL)
+    return g_strdup ("--:--:--");
+
+  return g_strdup_printf ("%02u:%02u:%02u", t->tm_hour, t->tm_min, t->tm_sec);
+}
+
+/* Called with lock held */
+static gchar *
+gst_clock_overlay_get_text (GstTextOverlay * overlay, GstBuffer * video_frame)
+{
+  gchar *time_str, *txt, *ret;
+
+  overlay->need_render = TRUE;
+
+  txt = g_strdup (overlay->default_text);
+
+  time_str = gst_clock_overlay_render_time (GST_CLOCK_OVERLAY (overlay));
+  if (txt != NULL && *txt != '\0') {
+    ret = g_strdup_printf ("%s %s", txt, time_str);
+  } else {
+    ret = time_str;
+    time_str = NULL;
+  }
+
+  g_free (txt);
+  g_free (time_str);
+
+  return ret;
+}
+
+static void
+gst_clock_overlay_class_init (GstClockOverlayClass * klass)
+{
+  GstTextOverlayClass *gsttextoverlay_class;
+
+  gsttextoverlay_class = (GstTextOverlayClass *) klass;
+
+  gsttextoverlay_class->get_text = gst_clock_overlay_get_text;
+}
+
+static void
+gst_clock_overlay_init (GstClockOverlay * overlay, GstClockOverlayClass * klass)
+{
+  PangoFontDescription *font_description;
+  GstTextOverlay *textoverlay;
+  PangoContext *context;
+
+  textoverlay = GST_TEXT_OVERLAY (overlay);
+
+  context = GST_TEXT_OVERLAY_CLASS (klass)->pango_context;
+
+  pango_context_set_language (context, pango_language_from_string ("en_US"));
+  pango_context_set_base_dir (context, PANGO_DIRECTION_LTR);
+
+  font_description = pango_font_description_new ();
+  pango_font_description_set_family_static (font_description, "Monospace");
+  pango_font_description_set_style (font_description, PANGO_STYLE_NORMAL);
+  pango_font_description_set_variant (font_description, PANGO_VARIANT_NORMAL);
+  pango_font_description_set_weight (font_description, PANGO_WEIGHT_NORMAL);
+  pango_font_description_set_stretch (font_description, PANGO_STRETCH_NORMAL);
+  pango_font_description_set_size (font_description, 18 * PANGO_SCALE);
+  pango_context_set_font_description (context, font_description);
+  pango_font_description_free (font_description);
+
+  textoverlay->valign = GST_TEXT_OVERLAY_VALIGN_TOP;
+  textoverlay->halign = GST_TEXT_OVERLAY_HALIGN_LEFT;
+}