pango: allow per feature registration

Split plugin into features including
dynamic types which can be indiviually
registered during a static build.

More details here:

https://gitlab.freedesktop.org/gstreamer/gst-build/-/merge_requests/199
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/661

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1029>

ext/pango/gstbasetextoverlay.c

@@ -43,9 +43,6 @@
  *    clipped properly during blitting (if wrapping is disabled)
  */
 
-GST_DEBUG_CATEGORY (pango_debug);
-#define GST_CAT_DEFAULT pango_debug
-
 #define DEFAULT_PROP_TEXT 	""
 #define DEFAULT_PROP_SHADING	FALSE
 #define DEFAULT_PROP_VALIGNMENT	GST_BASE_TEXT_OVERLAY_VALIGN_BASELINE
@@ -3075,28 +3072,3 @@ gst_base_text_overlay_change_state (GstElement * element,
 
   return ret;
 }
-
-static gboolean
-plugin_init (GstPlugin * plugin)
-{
-  if (!gst_element_register (plugin, "textoverlay", GST_RANK_NONE,
-          GST_TYPE_TEXT_OVERLAY) ||
-      !gst_element_register (plugin, "timeoverlay", GST_RANK_NONE,
-          GST_TYPE_TIME_OVERLAY) ||
-      !gst_element_register (plugin, "clockoverlay", GST_RANK_NONE,
-          GST_TYPE_CLOCK_OVERLAY) ||
-      !gst_element_register (plugin, "textrender", GST_RANK_NONE,
-          GST_TYPE_TEXT_RENDER)) {
-    return FALSE;
-  }
-
-  /*texttestsrc_plugin_init(module, plugin); */
-
-  GST_DEBUG_CATEGORY_INIT (pango_debug, "pango", 0, "Pango elements");
-
-  return TRUE;
-}
-
-GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR,
-    pango, "Pango-based text rendering and overlay", plugin_init,
-    VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

ext/pango/gstclockoverlay.c

@@ -49,10 +49,11 @@
 #include "config.h"
 #endif
 
-#include "gstclockoverlay.h"
 #include <gst/video/video.h>
 #include <time.h>
 
+#include "gstclockoverlay.h"
+#include "gstpangoelements.h"
 
 #define DEFAULT_PROP_TIMEFORMAT 	"%H:%M:%S"
 
@@ -65,6 +66,8 @@ enum
 
 #define gst_clock_overlay_parent_class parent_class
 G_DEFINE_TYPE (GstClockOverlay, gst_clock_overlay, GST_TYPE_BASE_TEXT_OVERLAY);
+GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (clockoverlay, "clockoverlay",
+    GST_RANK_NONE, GST_TYPE_CLOCK_OVERLAY, pango_element_init (plugin));
 
 static void gst_clock_overlay_finalize (GObject * object);
 static void gst_clock_overlay_set_property (GObject * object, guint prop_id,

ext/pango/gstpangoelement.c

@@ -0,0 +1,45 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2003> David Schleef <ds@schleef.org>
+ * Copyright (C) <2006> Julien Moutte <julien@moutte.net>
+ * Copyright (C) <2006> Zeeshan Ali <zeeshan.ali@nokia.com>
+ * Copyright (C) <2006-2008> Tim-Philipp Müller <tim centricular net>
+ * Copyright (C) <2009> Young-Ho Cha <ganadist@gmail.com>
+ * Copyright (C) 2020 Huawei Technologies Co., Ltd.
+ *   @Author: Stéphane Cerveau <scerveau@collabora.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., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "gstpangoelements.h"
+
+GST_DEBUG_CATEGORY (pango_debug);
+#define GST_CAT_DEFAULT pango_debug
+
+void
+pango_element_init (GstPlugin * plugin)
+{
+  static gsize res = FALSE;
+  if (g_once_init_enter (&res)) {
+    /*texttestsrc_plugin_init(module, plugin); */
+    GST_DEBUG_CATEGORY_INIT (pango_debug, "pango", 0, "Pango elements");
+    g_once_init_leave (&res, TRUE);
+  }
+}

ext/pango/gstpangoelements.h

@@ -0,0 +1,43 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2003> David Schleef <ds@schleef.org>
+ * Copyright (C) <2006> Julien Moutte <julien@moutte.net>
+ * Copyright (C) <2006> Zeeshan Ali <zeeshan.ali@nokia.com>
+ * Copyright (C) <2006-2008> Tim-Philipp Müller <tim centricular net>
+ * Copyright (C) <2009> Young-Ho Cha <ganadist@gmail.com>
+ * Copyright (C) 2020 Huawei Technologies Co., Ltd.
+ *   @Author: Stéphane Cerveau <scerveau@collabora.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., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __GST_PANGO_ELEMENTS_H__
+#define __GST_PANGO_ELEMENTS_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+G_GNUC_INTERNAL void pango_element_init (GstPlugin * plugin);
+
+GST_ELEMENT_REGISTER_DECLARE (textoverlay);
+GST_ELEMENT_REGISTER_DECLARE (timeoverlay);
+GST_ELEMENT_REGISTER_DECLARE (clockoverlay);
+GST_ELEMENT_REGISTER_DECLARE (textrender);
+
+G_END_DECLS
+
+#endif /* __GST_PANGO_ELEMENTS_H__ */

ext/pango/gstpangoplugin.c

@@ -0,0 +1,48 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2003> David Schleef <ds@schleef.org>
+ * Copyright (C) <2006> Julien Moutte <julien@moutte.net>
+ * Copyright (C) <2006> Zeeshan Ali <zeeshan.ali@nokia.com>
+ * Copyright (C) <2006-2008> Tim-Philipp Müller <tim centricular net>
+ * Copyright (C) <2009> Young-Ho Cha <ganadist@gmail.com>
+ * Copyright (C) 2020 Huawei Technologies Co., Ltd.
+ *   @Author: Stéphane Cerveau <scerveau@collabora.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., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "gstpangoelements.h"
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  gboolean ret = FALSE;
+
+  ret |= GST_ELEMENT_REGISTER (textoverlay, plugin);
+  ret |= GST_ELEMENT_REGISTER (timeoverlay, plugin);
+  ret |= GST_ELEMENT_REGISTER (clockoverlay, plugin);
+  ret |= GST_ELEMENT_REGISTER (textrender, plugin);
+
+  return ret;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR,
+    pango, "Pango-based text rendering and overlay", plugin_init,
+    VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

ext/pango/gsttextoverlay.c

@@ -75,7 +75,8 @@
 #include "config.h"
 #endif
 
-#include <gsttextoverlay.h>
+#include "gsttextoverlay.h"
+#include "gstpangoelements.h"
 
 static GstStaticPadTemplate text_sink_template_factory =
 GST_STATIC_PAD_TEMPLATE ("text_sink",
@@ -85,6 +86,8 @@ GST_STATIC_PAD_TEMPLATE ("text_sink",
     );
 
 G_DEFINE_TYPE (GstTextOverlay, gst_text_overlay, GST_TYPE_BASE_TEXT_OVERLAY);
+GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (textoverlay, "textoverlay",
+    GST_RANK_NONE, GST_TYPE_TEXT_OVERLAY, pango_element_init (plugin));
 
 static void
 gst_text_overlay_class_init (GstTextOverlayClass * klass)

ext/pango/gsttextrender.c

@@ -42,12 +42,13 @@
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
-
+#include <string.h>
 #include <gst/gst.h>
 #include <gst/video/video.h>
 
 #include "gsttextrender.h"
-#include <string.h>
+#include "gstpangoelements.h"
+
 
 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
 # define CAIRO_ARGB_A 3
@@ -165,6 +166,8 @@ static void gst_text_render_adjust_values_with_fontdesc (GstTextRender *
 
 #define gst_text_render_parent_class parent_class
 G_DEFINE_TYPE (GstTextRender, gst_text_render, GST_TYPE_ELEMENT);
+GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (textrender, "textrender",
+    GST_RANK_NONE, GST_TYPE_TEXT_RENDER, pango_element_init (plugin));
 
 static void gst_text_render_finalize (GObject * object);
 static void gst_text_render_set_property (GObject * object,

ext/pango/gsttimeoverlay.c

@@ -51,6 +51,7 @@
 #include <gst/video/video.h>
 
 #include "gsttimeoverlay.h"
+#include "gstpangoelements.h"
 
 #define DEFAULT_TIME_LINE GST_TIME_OVERLAY_TIME_LINE_BUFFER_TIME
 #define DEFAULT_SHOW_TIMES_AS_DATES FALSE
@@ -67,6 +68,8 @@ enum
 
 #define gst_time_overlay_parent_class parent_class
 G_DEFINE_TYPE (GstTimeOverlay, gst_time_overlay, GST_TYPE_BASE_TEXT_OVERLAY);
+GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (timeoverlay, "timeoverlay",
+    GST_RANK_NONE, GST_TYPE_TIME_OVERLAY, pango_element_init (plugin));
 
 static void gst_time_overlay_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec);

ext/pango/meson.build

@@ -1,4 +1,6 @@
 pango_sources = [
+  'gstpangoelement.c',
+  'gstpangoplugin.c',
   'gstbasetextoverlay.c',
   'gstclockoverlay.c',
   'gsttextoverlay.c',