1 /* GStreamer base utils library
2 * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 /**
21 * SECTION:gstpbutils
22 * @title: Pbutils
23 * @short_description: General Application and Plugin Utility Library
24 *
25 * libgstpbutils is a general utility library for plugins and applications.
26 * It currently provides the
27 * following:
28 *
29 * * human-readable description strings of codecs, elements, sources, decoders,
30 * encoders, or sinks from decoder/encoder caps, element names, or protocol
31 * names.
32 *
33 * * support for applications to initiate installation of missing plugins (if
34 * this is supported by the distribution or operating system used)
35 *
36 * * API for GStreamer elements to create missing-plugin messages in order to
37 * communicate to the application that a certain type of plugin is missing
38 * (decoder, encoder, URI protocol source, URI protocol sink, named element)
39 *
40 * * API for applications to recognise and handle missing-plugin messages
41 *
42 * ## Linking to this library
43 *
44 * You should obtain the required CFLAGS and LIBS using pkg-config on the
45 * gstreamer-plugins-base-1.0 module. You will then also need to add
46 * '-lgstreamer-pbutils-1.0' manually to your LIBS line.
47 *
48 * ## Library initialisation
49 *
50 * Before using any of its functions, applications and plugins must call
51 * gst_pb_utils_init() to initialise the library.
52 *
53 */
54
55 #ifdef HAVE_CONFIG_H
56 # include "config.h"
57 #endif
58
59 #include "pbutils.h"
60 #include "pbutils-private.h"
61
62 #include "gst/gst-i18n-plugin.h"
63
64 #ifndef GST_DISABLE_GST_DEBUG
65 #define GST_CAT_DEFAULT gst_pb_utils_ensure_debug_category()
66
67 static GstDebugCategory *
gst_pb_utils_ensure_debug_category(void)68 gst_pb_utils_ensure_debug_category (void)
69 {
70 static gsize cat_gonce = 0;
71
72 if (g_once_init_enter (&cat_gonce)) {
73 GstDebugCategory *cat = NULL;
74
75 GST_DEBUG_CATEGORY_INIT (cat, "pbutils", 0, "GStreamer Plugins Base utils");
76
77 g_once_init_leave (&cat_gonce, (gsize) cat);
78 }
79
80 return (GstDebugCategory *) cat_gonce;
81 }
82 #endif /* GST_DISABLE_GST_DEBUG */
83
84 static gpointer
_init_locale_text_domain(gpointer data)85 _init_locale_text_domain (gpointer data)
86 {
87 #ifdef ENABLE_NLS
88 GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
89 LOCALEDIR);
90 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
91 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
92 #endif
93
94 return NULL;
95 }
96
97 void
gst_pb_utils_init_locale_text_domain(void)98 gst_pb_utils_init_locale_text_domain (void)
99 {
100 static GOnce locale_init_once = G_ONCE_INIT;
101
102 g_once (&locale_init_once, _init_locale_text_domain, NULL);
103 }
104
105 /**
106 * gst_pb_utils_init:
107 *
108 * Initialises the base utils support library. This function is not
109 * thread-safe. Applications should call it after calling gst_init(),
110 * plugins should call it from their plugin_init function.
111 *
112 * This function may be called multiple times. It will do nothing if the
113 * library has already been initialised.
114 */
115 void
gst_pb_utils_init(void)116 gst_pb_utils_init (void)
117 {
118 static gboolean inited; /* FALSE */
119
120 if (inited) {
121 GST_LOG ("already initialised");
122 return;
123 }
124 gst_pb_utils_init_locale_text_domain ();
125
126 inited = TRUE;
127 }
128