avi: 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-good/-/merge_requests/876>

gst/avi/gstavi.c

@@ -23,32 +23,18 @@
 #include "config.h"
 #endif
 
-#include "gst/gst-i18n-plugin.h"
+#include "gstavielements.h"
-
-#include "gstavidemux.h"
-#include "gstavimux.h"
-#include "gstavisubtitle.h"
 
 static gboolean
 plugin_init (GstPlugin * plugin)
 {
-  gst_riff_init ();
+  gboolean ret = FALSE;
 
-#ifdef ENABLE_NLS
+  ret |= GST_ELEMENT_REGISTER (avidemux, plugin);
-  bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
+  ret |= GST_ELEMENT_REGISTER (avimux, plugin);
-  bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+  ret |= GST_ELEMENT_REGISTER (avisubtitle, plugin);
-#endif /* ENABLE_NLS */
 
-  if (!gst_element_register (plugin, "avidemux", GST_RANK_PRIMARY,
+  return ret;
-          GST_TYPE_AVI_DEMUX) ||
-      !gst_element_register (plugin, "avimux", GST_RANK_PRIMARY,
-          GST_TYPE_AVI_MUX) ||
-      !gst_element_register (plugin, "avisubtitle", GST_RANK_PRIMARY,
-          GST_TYPE_AVI_SUBTITLE)) {
-    return FALSE;
-  }
-
-  return TRUE;
 }
 
 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,

gst/avi/gstavidemux.c

@@ -47,6 +47,7 @@
 #include <stdio.h>
 
 #include "gst/riff/riff-media.h"
+#include "gstavielements.h"
 #include "gstavidemux.h"
 #include "avi-ids.h"
 #include <gst/gst-i18n-plugin.h>
@@ -132,6 +133,8 @@ static void parse_tag_value (GstAviDemux * avi, GstTagList * taglist,
 
 #define gst_avi_demux_parent_class parent_class
 G_DEFINE_TYPE (GstAviDemux, gst_avi_demux, GST_TYPE_ELEMENT);
+GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (avidemux, "avidemux", GST_RANK_PRIMARY,
+    GST_TYPE_AVI_DEMUX, avi_element_init (plugin));
 
 static void
 gst_avi_demux_class_init (GstAviDemuxClass * klass)

gst/avi/gstavielement.c

@@ -0,0 +1,44 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
+ * Copyright (C) 2020 Huawei Technologies Co., Ltd.
+ *   @Author: Stéphane Cerveau <stephane.cerveau@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 "gst/gst-i18n-plugin.h"
+#include "gst/riff/riff-read.h"
+
+#include "gstavielements.h"
+
+void
+avi_element_init (GstPlugin * plugin)
+{
+  static gsize res = FALSE;
+  if (g_once_init_enter (&res)) {
+    gst_riff_init ();
+
+#ifdef ENABLE_NLS
+    bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
+    bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+#endif /* ENABLE_NLS */
+    g_once_init_leave (&res, TRUE);
+  }
+}

gst/avi/gstavielements.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
+ * Copyright (C) 2020 Huawei Technologies Co., Ltd.
+ *   @Author: Stéphane Cerveau <stephane.cerveau@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_AVI_ELEMENTS_H__
+#define __GST_AVI_ELEMENTS_H__
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+void avi_element_init (GstPlugin * plugin);
+
+GST_ELEMENT_REGISTER_DECLARE (avidemux);
+GST_ELEMENT_REGISTER_DECLARE (avimux);
+GST_ELEMENT_REGISTER_DECLARE (avisubtitle);
+
+G_END_DECLS
+
+#endif /* __GST_AVI_ELEMENT_H__ */

gst/avi/gstavimux.c

@@ -69,6 +69,7 @@
 #include <gst/audio/audio.h>
 #include <gst/base/gstbytewriter.h>
 
+#include "gstavielements.h"
 #include "gstavimux.h"
 
 GST_DEBUG_CATEGORY_STATIC (avimux_debug);
@@ -202,6 +203,8 @@ static GstStateChangeReturn gst_avi_mux_change_state (GstElement * element,
 #define gst_avi_mux_parent_class parent_class
 G_DEFINE_TYPE_WITH_CODE (GstAviMux, gst_avi_mux, GST_TYPE_ELEMENT,
     G_IMPLEMENT_INTERFACE (GST_TYPE_TAG_SETTER, NULL));
+GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (avimux, "avimux", GST_RANK_PRIMARY,
+    GST_TYPE_AVI_MUX, avi_element_init (plugin));
 
 static void
 gst_avi_mux_finalize (GObject * object)

gst/avi/gstavisubtitle.c

@@ -53,6 +53,7 @@
 
 #include <string.h>
 
+#include "gstavielements.h"
 #include "gstavisubtitle.h"
 
 GST_DEBUG_CATEGORY_STATIC (avisubtitle_debug);
@@ -80,6 +81,8 @@ static gboolean gst_avi_subtitle_send_event (GstElement * element,
 
 #define gst_avi_subtitle_parent_class parent_class
 G_DEFINE_TYPE (GstAviSubtitle, gst_avi_subtitle, GST_TYPE_ELEMENT);
+GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (avisubtitle, "avisubtitle",
+    GST_RANK_PRIMARY, GST_TYPE_AVI_SUBTITLE, avi_element_init (plugin));
 
 #define IS_BOM_UTF8(data)     ((GST_READ_UINT32_BE(data) >> 8) == 0xEFBBBF)
 #define IS_BOM_UTF16_BE(data) (GST_READ_UINT16_BE(data) == 0xFEFF)

gst/avi/meson.build

@@ -1,4 +1,5 @@
 avi_sources = [
+  'gstavielement.c',
   'gstavi.c',
   'gstavimux.c',
   'gstavidemux.c',