qroverlay: 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-bad/-/merge_requests/2038>

ext/qroverlay/gstdebugqroverlay.c

@@ -54,8 +54,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#include "gstqroverlayelements.h"
 #include "gstdebugqroverlay.h"
 
+
 GST_DEBUG_CATEGORY_STATIC (gst_debug_qr_overlay_debug);
 #define GST_CAT_DEFAULT gst_debug_qr_overlay_debug
 
@@ -96,6 +98,9 @@ struct _GstDebugQROverlay
 #define gst_debug_qr_overlay_parent_class parent_class
 G_DEFINE_TYPE (GstDebugQROverlay, gst_debug_qr_overlay,
     GST_TYPE_BASE_QR_OVERLAY);
+GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (debugqroverlay, "debugqroverlay",
+    GST_RANK_NONE, GST_TYPE_DEBUG_QR_OVERLAY, qroverlay_element_init (plugin));
+
 
 static void gst_debug_qr_overlay_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec);

ext/qroverlay/gstqroverlay.c

@@ -47,11 +47,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#include "gstqroverlayelements.h"
 #include "gstqroverlay.h"
 
-GST_DEBUG_CATEGORY_STATIC (gst_qr_overlay_debug);
-#define GST_CAT_DEFAULT gst_qr_overlay_debug
-
 enum
 {
   PROP_0,
@@ -68,6 +66,8 @@ struct _GstQROverlay
 
 #define gst_qr_overlay_parent_class parent_class
 G_DEFINE_TYPE (GstQROverlay, gst_qr_overlay, GST_TYPE_BASE_QR_OVERLAY);
+GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (qroverlay, "qroverlay", GST_RANK_NONE,
+    GST_TYPE_QR_OVERLAY, qroverlay_element_init (plugin));
 
 static gchar *
 get_qrcode_content (GstBaseQROverlay * base, GstBuffer * buf,
@@ -156,25 +156,3 @@ static void
 gst_qr_overlay_init (GstQROverlay * filter)
 {
 }
-
-#include "gstdebugqroverlay.h"
-
-static gboolean
-qroverlay_init (GstPlugin * qroverlay)
-{
-  GST_DEBUG_CATEGORY_INIT (gst_qr_overlay_debug, "qroverlay", 0,
-      "Qrcode overlay element");
-
-  if (gst_element_register (qroverlay, "debugqroverlay", GST_RANK_NONE,
-          GST_TYPE_DEBUG_QR_OVERLAY))
-    return gst_element_register (qroverlay, "qroverlay", GST_RANK_NONE,
-        GST_TYPE_QR_OVERLAY);
-
-  return FALSE;
-}
-
-GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
-    GST_VERSION_MINOR,
-    qroverlay,
-    "libqrencode qroverlay plugin",
-    qroverlay_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)

ext/qroverlay/gstqroverlayelement.c

@@ -0,0 +1,44 @@
+/*
+ * GStreamer
+ * Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
+ * Copyright (c) 2020 Anthony Violo <anthony.violo@ubicast.eu>
+ * Copyright (c) 2020 Thibault Saunier <tsaunier@igalia.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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+
+#include "gstqroverlayelements.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_qr_overlay_debug);
+#define GST_CAT_DEFAULT gst_qr_overlay_debug
+
+void
+qroverlay_element_init (GstPlugin * plugin)
+{
+  static gsize res = FALSE;
+
+  if (g_once_init_enter (&res)) {
+    GST_DEBUG_CATEGORY_INIT (gst_qr_overlay_debug, "qroverlay", 0,
+        "Qrcode overlay element");
+    g_once_init_leave (&res, TRUE);
+  }
+}

ext/qroverlay/gstqroverlayelements.h

@@ -0,0 +1,38 @@
+/*
+ * GStreamer
+ * Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
+ * Copyright (c) 2020 Anthony Violo <anthony.violo@ubicast.eu>
+ *
+ * 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 __GST_QR_OVERLAY_H__
+#define __GST_QR_OVERLAY_H__
+
+#include "gstbaseqroverlay.h"
+
+G_BEGIN_DECLS
+#define GST_TYPE_QR_OVERLAY (gst_qr_overlay_get_type())
+
+G_DECLARE_FINAL_TYPE (GstQROverlay, gst_qr_overlay, GST, QR_OVERLAY, GstBaseQROverlay);
+
+
+void qroverlay_element_init (GstPlugin * plugin);
+GST_ELEMENT_REGISTER_DECLARE (debugqroverlay);
+GST_ELEMENT_REGISTER_DECLARE (qroverlay);
+
+G_END_DECLS
+#endif /* __GST_QR_OVERLAY_H__ */

ext/qroverlay/gstqroverlayplugin.c

@@ -0,0 +1,60 @@
+/*
+ * GStreamer
+ * Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
+ * Copyright (c) 2020 Anthony Violo <anthony.violo@ubicast.eu>
+ * Copyright (c) 2020 Thibault Saunier <tsaunier@igalia.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-qroverlay
+ *
+ * Element to set random data on a qroverlay.
+ *
+ * ## Example launch line
+ *
+ * ``` bash
+ * gst-launch -v -m videotestsrc ! qroverlay ! fakesink silent=TRUE
+ * ```
+ *
+ * Since: 1.20
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+
+#include "gstqroverlayelements.h"
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  gboolean ret = FALSE;
+
+  ret |= GST_ELEMENT_REGISTER (debugqroverlay, plugin);
+  ret |= GST_ELEMENT_REGISTER (qroverlay, plugin);
+
+  return ret;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    qroverlay,
+    "libqrencode qroverlay plugin",
+    plugin_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)

ext/qroverlay/meson.build

@@ -2,7 +2,7 @@ qrencode_dep = dependency('libqrencode', required: get_option('qroverlay'))
 if qrencode_dep.found()
   json_dep = dependency('json-glib-1.0', fallback : ['json-glib', 'json_glib_dep'], required: get_option('qroverlay'))
   if json_dep.found()
-    gstqroverlay = library('gstqroverlay', ['gstqroverlay.c', 'gstdebugqroverlay.c', 'gstbaseqroverlay.c'],
+    gstqroverlay = library('gstqroverlay', ['gstqroverlay.c', 'gstdebugqroverlay.c', 'gstbaseqroverlay.c', 'gstqroverlayelement.c', 'gstqroverlayplugin.c'],
       c_args : gst_plugins_bad_args,
       include_directories : [configinc],
       dependencies : [gstvideo_dep, qrencode_dep, json_dep],