Port pango-based textoverlay, timeoverlay and textrender to 0.9 and add background shading and text wrapping modes. M...

Original commit message from CVS:
* configure.ac:
* ext/Makefile.am:
* ext/pango/Makefile.am:
* ext/pango/gstclockoverlay.c: (gst_clock_overlay_base_init),
(gst_clock_overlay_render_time), (gst_clock_overlay_get_text),
(gst_clock_overlay_class_init), (gst_clock_overlay_init):
* ext/pango/gstclockoverlay.h:
* ext/pango/gsttextoverlay.c: (gst_text_overlay_base_init),
(gst_text_overlay_get_text), (gst_text_overlay_class_init),
(gst_text_overlay_finalize), (gst_text_overlay_init),
(gst_text_overlay_update_wrap_mode), (gst_text_overlay_setcaps),
(gst_text_overlay_text_pad_linked),
(gst_text_overlay_text_pad_unlinked),
(gst_text_overlay_set_property), (gst_text_overlay_getcaps),
(gst_text_overlay_shade_y), (gst_text_overlay_blit_yuv420),
(gst_text_overlay_resize_bitmap), (gst_text_overlay_render_text),
(gst_text_overlay_push_frame), (gst_text_overlay_pop_video),
(gst_text_overlay_pop_text), (gst_text_overlay_collected),
(gst_text_overlay_change_state), (plugin_init):
* ext/pango/gsttextoverlay.h:
* ext/pango/gsttimeoverlay.c: (gst_time_overlay_base_init),
(gst_time_overlay_render_time), (gst_time_overlay_get_text),
(gst_time_overlay_class_init), (gst_time_overlay_init):
* ext/pango/gsttimeoverlay.h:
Port pango-based textoverlay, timeoverlay and textrender to 0.9
and add background shading and text wrapping modes. Make
timoverlay derive from textoverlay. Also add new clockoverlay
element.

1 files changed, 119 insertions, 0 deletions

diff --git a/ext/pango/gstclockoverlay.c b/ext/pango/gstclockoverlay.c
new file mode 100644
index 00000000..4e4f7a3c
--- /dev/null
+++ b/ext/pango/gstclockoverlay.c
@@ -0,0 +1,119 @@
+/* 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gstclockoverlay.h>
+#include <gst/video/video.h>
+#include <time.h>
+
+static GstElementDetails clock_overlay_details =
+GST_ELEMENT_DETAILS ("Time Overlay",
+    "Filter/Editor/Video",
+    "Overlays the 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;
+
+  now = time (NULL);
+  if (localtime_r (&now, &t) == NULL)
+    return g_strdup ("--:--:--");
+
+  return g_strdup_printf ("%02u:%02u:%02u", t.tm_hour, t.tm_min, t.tm_sec);
+}
+
+static gchar *
+gst_clock_overlay_get_text (GstTextOverlay * overlay, GstBuffer * video_frame)
+{
+  gchar *time_str, *txt, *ret;
+
+  overlay->need_render = TRUE;
+
+  GST_OBJECT_LOCK (overlay);
+  txt = g_strdup (overlay->default_text);
+  GST_OBJECT_UNLOCK (overlay);
+
+  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 (font_description, g_strdup ("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;
+}