openal: 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/openal/gstopenal.c

@@ -26,32 +26,19 @@
 #include "config.h"
 #endif
 
-#include "gstopenalsink.h"
-#include "gstopenalsrc.h"
+#include "gstopenalelements.h"
 
 #include <gst/gst-i18n-plugin.h>
 
-GST_DEBUG_CATEGORY (openal_debug);
 
 static gboolean
 plugin_init (GstPlugin * plugin)
 {
-  if (!gst_element_register (plugin, "openalsink", GST_RANK_SECONDARY,
-          GST_TYPE_OPENAL_SINK))
-    return FALSE;
+  gboolean ret = FALSE;
 
-  if (!gst_element_register (plugin, "openalsrc", GST_RANK_SECONDARY,
-          GST_TYPE_OPENAL_SRC))
-    return FALSE;
+  ret |= GST_ELEMENT_REGISTER (openalsink, plugin);
+  ret |= GST_ELEMENT_REGISTER (openalsrc, plugin);
 
-#ifdef ENABLE_NLS
-  GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
-      LOCALEDIR);
-  bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
-  bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
-#endif
-
-  GST_DEBUG_CATEGORY_INIT (openal_debug, "openal", 0, "openal plugins");
   return TRUE;
 }
 

ext/openal/gstopenalelement.c

@@ -0,0 +1,51 @@
+/*
+ * GStreamer openal plugin
+ *
+ * Copyright (C) 2005 Wim Taymans <wim@fluendo.com>
+ * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
+ * Copyright (C) 2009-2010 Chris Robinson <chris.kcat@gmail.com>
+ * Copyright (C) 2013 Juan Manuel Borges Caño <juanmabcmail@gmail.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 "gstopenalelements.h"
+#include "gstopenalsink.h"
+#include "gstopenalsrc.h"
+
+#include <gst/gst-i18n-plugin.h>
+
+GST_DEBUG_CATEGORY (openal_debug);
+
+void
+openal_element_init (GstPlugin * plugin)
+{
+  static gsize res = FALSE;
+  if (g_once_init_enter (&res)) {
+#ifdef ENABLE_NLS
+    GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
+        LOCALEDIR);
+    bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
+    bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+#endif
+    GST_DEBUG_CATEGORY_INIT (openal_debug, "openal", 0, "openal plugins");
+    g_once_init_leave (&res, TRUE);
+  }
+}

ext/openal/gstopenalelements.h

@@ -0,0 +1,35 @@
+/* GStreamer
+ * Copyright (C) <2020> The Gstreamer Contributors.
+ *
+ * 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_OPENAL_ELEMENTS_H__
+#define __GST_OPENAL_ELEMENTS_H__
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <gst/gst.h>
+
+void openal_element_init (GstPlugin * plugin);
+
+GST_ELEMENT_REGISTER_DECLARE (openalsink);
+GST_ELEMENT_REGISTER_DECLARE (openalsrc);
+
+#endif /* __GST_OPENAL_ELEMENTS_H__ */

ext/openal/gstopenalsink.c

@@ -61,6 +61,7 @@
 GST_DEBUG_CATEGORY_EXTERN (openal_debug);
 #define GST_CAT_DEFAULT openal_debug
 
+#include "gstopenalelements.h"
 #include "gstopenalsink.h"
 
 static void gst_openal_sink_dispose (GObject * object);
@@ -159,6 +160,8 @@ checkALError (const char *fname, unsigned int fline)
 #define checkALError() checkALError(__FILE__, __LINE__)
 
 G_DEFINE_TYPE (GstOpenALSink, gst_openal_sink, GST_TYPE_AUDIO_SINK);
+GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (openalsink, "openalsink",
+    GST_RANK_SECONDARY, GST_TYPE_OPENAL_SINK, openal_element_init (plugin));
 
 static void
 gst_openal_sink_dispose (GObject * object)

ext/openal/gstopenalsrc.c

@@ -81,6 +81,7 @@
 GST_DEBUG_CATEGORY_EXTERN (openal_debug);
 #define GST_CAT_DEFAULT openal_debug
 
+#include "gstopenalelements.h"
 #include "gstopenalsrc.h"
 
 static void gst_openal_src_dispose (GObject * object);
@@ -140,6 +141,8 @@ static GstStaticPadTemplate openalsrc_factory = GST_STATIC_PAD_TEMPLATE ("src",
     );
 
 G_DEFINE_TYPE (GstOpenalSrc, gst_openal_src, GST_TYPE_AUDIO_SRC);
+GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (openalsrc, "openalsrc",
+    GST_RANK_SECONDARY, GST_TYPE_OPENAL_SRC, openal_element_init (plugin));
 
 static void
 gst_openal_src_dispose (GObject * object)

ext/openal/meson.build

@@ -2,7 +2,7 @@ openal_dep = dependency('openal', method: 'pkg-config', version: '>= 1.14', requ
 
 if openal_dep.found()
   gstopenal = library('gstopenal',
-    'gstopenal.c', 'gstopenalsink.c', 'gstopenalsrc.c',
+    'gstopenal.c', 'gstopenalelement.c', 'gstopenalsink.c', 'gstopenalsrc.c',
     c_args: gst_plugins_bad_args,
     include_directories: [configinc, libsinc],
     dependencies: [gstaudio_dep, openal_dep],