2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
5 * gstplugin.c: Plugin subsystem for loading elements, types, and libs
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
25 * @short_description: Container for features loaded from a shared object module
26 * @see_also: #GstPluginFeature, #GstElementFactory
28 * GStreamer is extensible, so #GstElement instances can be loaded at runtime.
29 * A plugin system can provide one or more of the basic
30 * <application>GStreamer</application> #GstPluginFeature subclasses.
32 * A plugin should export a symbol <symbol>gst_plugin_desc</symbol> that is a
33 * struct of type #GstPluginDesc.
34 * the plugin loader will check the version of the core library the plugin was
35 * linked against and will create a new #GstPlugin. It will then call the
36 * #GstPluginInitFunc function that was provided in the
37 * <symbol>gst_plugin_desc</symbol>.
39 * Once you have a handle to a #GstPlugin (e.g. from the #GstRegistry), you
40 * can add any object that subclasses #GstPluginFeature.
42 * Usually plugins are always automaticlly loaded so you don't need to call
43 * gst_plugin_load() explicitly to bring it into memory. There are options to
44 * statically link plugins to an app or even use GStreamer without a plugin
45 * repository in which case gst_plugin_load() can be needed to bring the plugin
53 #include "gst_private.h"
55 #include <glib/gstdio.h>
56 #include <sys/types.h>
66 #include "glib-compat-private.h"
70 #define GST_CAT_DEFAULT GST_CAT_PLUGIN_LOADING
72 static guint _num_static_plugins; /* 0 */
73 static GstPluginDesc *_static_plugins; /* NULL */
74 static gboolean _gst_plugin_inited;
76 /* static variables for segfault handling of plugin loading */
77 static char *_gst_plugin_fault_handler_filename = NULL;
79 /* list of valid licenses.
80 * One of these must be specified or the plugin won't be loaded
81 * Contact gstreamer-devel@lists.sourceforge.net if your license should be
84 * GPL: http://www.gnu.org/copyleft/gpl.html
85 * LGPL: http://www.gnu.org/copyleft/lesser.html
86 * QPL: http://www.trolltech.com/licenses/qpl.html
87 * MPL: http://www.opensource.org/licenses/mozilla1.1.php
88 * MIT/X11: http://www.opensource.org/licenses/mit-license.php
89 * 3-clause BSD: http://www.opensource.org/licenses/bsd-license.php
91 static const gchar *valid_licenses[] = {
92 "LGPL", /* GNU Lesser General Public License */
93 "GPL", /* GNU General Public License */
94 "QPL", /* Trolltech Qt Public License */
95 "GPL/QPL", /* Combi-license of GPL + QPL */
96 "MPL", /* MPL 1.1 license */
97 "BSD", /* 3-clause BSD license */
98 "MIT/X11", /* MIT/X11 license */
99 "Proprietary", /* Proprietary license */
100 GST_LICENSE_UNKNOWN, /* some other license */
104 static GstPlugin *gst_plugin_register_func (GstPlugin * plugin,
105 const GstPluginDesc * desc, gpointer user_data);
106 static void gst_plugin_desc_copy (GstPluginDesc * dest,
107 const GstPluginDesc * src);
109 static void gst_plugin_ext_dep_free (GstPluginDep * dep);
111 G_DEFINE_TYPE (GstPlugin, gst_plugin, GST_TYPE_OBJECT);
114 gst_plugin_init (GstPlugin * plugin)
117 G_TYPE_INSTANCE_GET_PRIVATE (plugin, GST_TYPE_PLUGIN, GstPluginPrivate);
121 gst_plugin_finalize (GObject * object)
123 GstPlugin *plugin = GST_PLUGIN_CAST (object);
124 GstRegistry *registry = gst_registry_get_default ();
127 GST_DEBUG ("finalizing plugin %" GST_PTR_FORMAT, plugin);
128 for (g = registry->plugins; g; g = g->next) {
129 if (g->data == (gpointer) plugin) {
130 g_warning ("removing plugin that is still in registry");
133 g_free (plugin->filename);
134 g_free (plugin->basename);
136 g_list_foreach (plugin->priv->deps, (GFunc) gst_plugin_ext_dep_free, NULL);
137 g_list_free (plugin->priv->deps);
138 plugin->priv->deps = NULL;
140 if (plugin->priv->cache_data) {
141 gst_structure_free (plugin->priv->cache_data);
144 G_OBJECT_CLASS (gst_plugin_parent_class)->finalize (object);
148 gst_plugin_class_init (GstPluginClass * klass)
150 G_OBJECT_CLASS (klass)->finalize = gst_plugin_finalize;
152 g_type_class_add_private (klass, sizeof (GstPluginPrivate));
156 gst_plugin_error_quark (void)
158 static GQuark quark = 0;
161 quark = g_quark_from_static_string ("gst_plugin_error");
165 #ifndef GST_REMOVE_DEPRECATED
166 #ifdef GST_DISABLE_DEPRECATED
167 void _gst_plugin_register_static (GstPluginDesc * desc);
169 /* this function can be called in the GCC constructor extension, before
170 * the _gst_plugin_initialize() was called. In that case, we store the
171 * plugin description in a list to initialize it when we open the main
173 * When the main module is known, we can register the plugin right away.
176 _gst_plugin_register_static (GstPluginDesc * desc)
178 g_return_if_fail (desc != NULL);
180 if (!_gst_plugin_inited) {
181 /* We can't use any GLib functions here, since g_thread_init hasn't been
182 * called yet, and we can't call it here either, or programs that don't
183 * guard their g_thread_init calls in main() will just abort */
184 ++_num_static_plugins;
186 realloc (_static_plugins, _num_static_plugins * sizeof (GstPluginDesc));
187 /* assume strings in the GstPluginDesc are static const or live forever */
188 _static_plugins[_num_static_plugins - 1] = *desc;
190 gst_plugin_register_static (desc->major_version, desc->minor_version,
191 desc->name, desc->description, desc->plugin_init, desc->version,
192 desc->license, desc->source, desc->package, desc->origin);
198 * gst_plugin_register_static:
199 * @major_version: the major version number of the GStreamer core that the
200 * plugin was compiled for, you can just use GST_VERSION_MAJOR here
201 * @minor_version: the minor version number of the GStreamer core that the
202 * plugin was compiled for, you can just use GST_VERSION_MINOR here
203 * @name: a unique name of the plugin (ideally prefixed with an application- or
204 * library-specific namespace prefix in order to avoid name conflicts in
205 * case a similar plugin with the same name ever gets added to GStreamer)
206 * @description: description of the plugin
207 * @init_func: pointer to the init function of this plugin.
208 * @version: version string of the plugin
209 * @license: effective license of plugin. Must be one of the approved licenses
210 * (see #GstPluginDesc above) or the plugin will not be registered.
211 * @source: source module plugin belongs to
212 * @package: shipped package plugin belongs to
213 * @origin: URL to provider of plugin
215 * Registers a static plugin, ie. a plugin which is private to an application
216 * or library and contained within the application or library (as opposed to
217 * being shipped as a separate module file).
219 * You must make sure that GStreamer has been initialised (with gst_init() or
220 * via gst_init_get_option_group()) before calling this function.
222 * Returns: TRUE if the plugin was registered correctly, otherwise FALSE.
227 gst_plugin_register_static (gint major_version, gint minor_version,
228 const gchar * name, const gchar * description, GstPluginInitFunc init_func,
229 const gchar * version, const gchar * license, const gchar * source,
230 const gchar * package, const gchar * origin)
232 GstPluginDesc desc = { major_version, minor_version, name, description,
233 init_func, version, license, source, package, origin,
236 gboolean res = FALSE;
238 g_return_val_if_fail (name != NULL, FALSE);
239 g_return_val_if_fail (description != NULL, FALSE);
240 g_return_val_if_fail (init_func != NULL, FALSE);
241 g_return_val_if_fail (version != NULL, FALSE);
242 g_return_val_if_fail (license != NULL, FALSE);
243 g_return_val_if_fail (source != NULL, FALSE);
244 g_return_val_if_fail (package != NULL, FALSE);
245 g_return_val_if_fail (origin != NULL, FALSE);
247 /* make sure gst_init() has been called */
248 g_return_val_if_fail (_gst_plugin_inited != FALSE, FALSE);
250 GST_LOG ("attempting to load static plugin \"%s\" now...", name);
251 plugin = g_object_newv (GST_TYPE_PLUGIN, 0, NULL);
252 if (gst_plugin_register_func (plugin, &desc, NULL) != NULL) {
253 GST_INFO ("registered static plugin \"%s\"", name);
254 res = gst_default_registry_add_plugin (plugin);
255 GST_INFO ("added static plugin \"%s\", result: %d", name, res);
261 * gst_plugin_register_static_full:
262 * @major_version: the major version number of the GStreamer core that the
263 * plugin was compiled for, you can just use GST_VERSION_MAJOR here
264 * @minor_version: the minor version number of the GStreamer core that the
265 * plugin was compiled for, you can just use GST_VERSION_MINOR here
266 * @name: a unique name of the plugin (ideally prefixed with an application- or
267 * library-specific namespace prefix in order to avoid name conflicts in
268 * case a similar plugin with the same name ever gets added to GStreamer)
269 * @description: description of the plugin
270 * @init_full_func: pointer to the init function with user data of this plugin.
271 * @version: version string of the plugin
272 * @license: effective license of plugin. Must be one of the approved licenses
273 * (see #GstPluginDesc above) or the plugin will not be registered.
274 * @source: source module plugin belongs to
275 * @package: shipped package plugin belongs to
276 * @origin: URL to provider of plugin
277 * @user_data: gpointer to user data
279 * Registers a static plugin, ie. a plugin which is private to an application
280 * or library and contained within the application or library (as opposed to
281 * being shipped as a separate module file) with a #GstPluginInitFullFunc
282 * which allows user data to be passed to the callback function (useful
285 * You must make sure that GStreamer has been initialised (with gst_init() or
286 * via gst_init_get_option_group()) before calling this function.
288 * Returns: TRUE if the plugin was registered correctly, otherwise FALSE.
294 gst_plugin_register_static_full (gint major_version, gint minor_version,
295 const gchar * name, const gchar * description,
296 GstPluginInitFullFunc init_full_func, const gchar * version,
297 const gchar * license, const gchar * source, const gchar * package,
298 const gchar * origin, gpointer user_data)
300 GstPluginDesc desc = { major_version, minor_version, name, description,
301 (GstPluginInitFunc) init_full_func, version, license, source, package,
305 gboolean res = FALSE;
307 g_return_val_if_fail (name != NULL, FALSE);
308 g_return_val_if_fail (description != NULL, FALSE);
309 g_return_val_if_fail (init_full_func != NULL, FALSE);
310 g_return_val_if_fail (version != NULL, FALSE);
311 g_return_val_if_fail (license != NULL, FALSE);
312 g_return_val_if_fail (source != NULL, FALSE);
313 g_return_val_if_fail (package != NULL, FALSE);
314 g_return_val_if_fail (origin != NULL, FALSE);
316 /* make sure gst_init() has been called */
317 g_return_val_if_fail (_gst_plugin_inited != FALSE, FALSE);
319 GST_LOG ("attempting to load static plugin \"%s\" now...", name);
320 plugin = g_object_newv (GST_TYPE_PLUGIN, 0, NULL);
321 if (gst_plugin_register_func (plugin, &desc, user_data) != NULL) {
322 GST_INFO ("registered static plugin \"%s\"", name);
323 res = gst_default_registry_add_plugin (plugin);
324 GST_INFO ("added static plugin \"%s\", result: %d", name, res);
330 _gst_plugin_initialize (void)
334 _gst_plugin_inited = TRUE;
336 /* now register all static plugins */
337 GST_INFO ("registering %u static plugins", _num_static_plugins);
338 for (i = 0; i < _num_static_plugins; ++i) {
339 gst_plugin_register_static (_static_plugins[i].major_version,
340 _static_plugins[i].minor_version, _static_plugins[i].name,
341 _static_plugins[i].description, _static_plugins[i].plugin_init,
342 _static_plugins[i].version, _static_plugins[i].license,
343 _static_plugins[i].source, _static_plugins[i].package,
344 _static_plugins[i].origin);
347 if (_static_plugins) {
348 free (_static_plugins);
349 _static_plugins = NULL;
350 _num_static_plugins = 0;
354 /* this function could be extended to check if the plugin license matches the
355 * applications license (would require the app to register its license somehow).
356 * We'll wait for someone who's interested in it to code it :)
359 gst_plugin_check_license (const gchar * license)
361 const gchar **check_license = valid_licenses;
363 g_assert (check_license);
365 while (*check_license) {
366 if (strcmp (license, *check_license) == 0)
374 gst_plugin_check_version (gint major, gint minor)
376 /* return NULL if the major and minor version numbers are not compatible */
378 if (major != GST_VERSION_MAJOR || minor != GST_VERSION_MINOR)
385 gst_plugin_register_func (GstPlugin * plugin, const GstPluginDesc * desc,
388 if (!gst_plugin_check_version (desc->major_version, desc->minor_version)) {
390 GST_WARNING ("plugin \"%s\" has incompatible version, not loading",
395 if (!desc->license || !desc->description || !desc->source ||
396 !desc->package || !desc->origin) {
398 GST_WARNING ("plugin \"%s\" has incorrect GstPluginDesc, not loading",
403 if (!gst_plugin_check_license (desc->license)) {
405 GST_WARNING ("plugin \"%s\" has invalid license \"%s\", not loading",
406 plugin->filename, desc->license);
411 GST_LOG ("plugin \"%s\" looks good", GST_STR_NULL (plugin->filename));
413 gst_plugin_desc_copy (&plugin->desc, desc);
415 /* make resident so we're really sure it never gets unloaded again.
416 * Theoretically this is not needed, but practically it doesn't hurt.
417 * And we're rather safe than sorry. */
419 g_module_make_resident (plugin->module);
422 if (!(((GstPluginInitFullFunc) (desc->plugin_init)) (plugin, user_data))) {
424 GST_WARNING ("plugin \"%s\" failed to initialise", plugin->filename);
428 if (!((desc->plugin_init) (plugin))) {
430 GST_WARNING ("plugin \"%s\" failed to initialise", plugin->filename);
436 GST_LOG ("plugin \"%s\" initialised", GST_STR_NULL (plugin->filename));
441 #ifdef HAVE_SIGACTION
442 static struct sigaction oldaction;
443 static gboolean _gst_plugin_fault_handler_is_setup = FALSE;
446 * _gst_plugin_fault_handler_restore:
447 * segfault handler restorer
450 _gst_plugin_fault_handler_restore (void)
452 if (!_gst_plugin_fault_handler_is_setup)
455 _gst_plugin_fault_handler_is_setup = FALSE;
457 sigaction (SIGSEGV, &oldaction, NULL);
461 * _gst_plugin_fault_handler_sighandler:
462 * segfault handler implementation
465 _gst_plugin_fault_handler_sighandler (int signum)
467 /* We need to restore the fault handler or we'll keep getting it */
468 _gst_plugin_fault_handler_restore ();
472 g_print ("\nERROR: ");
473 g_print ("Caught a segmentation fault while loading plugin file:\n");
474 g_print ("%s\n\n", _gst_plugin_fault_handler_filename);
475 g_print ("Please either:\n");
476 g_print ("- remove it and restart.\n");
477 g_print ("- run with --gst-disable-segtrap and debug.\n");
481 g_print ("Caught unhandled signal on plugin loading\n");
487 * _gst_plugin_fault_handler_setup:
488 * sets up the segfault handler
491 _gst_plugin_fault_handler_setup (void)
493 struct sigaction action;
495 /* if asked to leave segfaults alone, just return */
496 if (!gst_segtrap_is_enabled ())
499 if (_gst_plugin_fault_handler_is_setup)
502 _gst_plugin_fault_handler_is_setup = TRUE;
504 memset (&action, 0, sizeof (action));
505 action.sa_handler = _gst_plugin_fault_handler_sighandler;
507 sigaction (SIGSEGV, &action, &oldaction);
509 #else /* !HAVE_SIGACTION */
511 _gst_plugin_fault_handler_restore (void)
516 _gst_plugin_fault_handler_setup (void)
519 #endif /* HAVE_SIGACTION */
521 static GStaticMutex gst_plugin_loading_mutex = G_STATIC_MUTEX_INIT;
523 #define CHECK_PLUGIN_DESC_FIELD(desc,field,fn) \
524 if (G_UNLIKELY ((desc)->field == NULL)) { \
525 GST_ERROR ("GstPluginDesc for '%s' has no %s", fn, G_STRINGIFY (field)); \
529 * gst_plugin_load_file:
530 * @filename: the plugin filename to load
531 * @error: pointer to a NULL-valued GError
533 * Loads the given plugin and refs it. Caller needs to unref after use.
535 * Returns: a reference to the existing loaded GstPlugin, a reference to the
536 * newly-loaded GstPlugin, or NULL if an error occurred.
539 gst_plugin_load_file (const gchar * filename, GError ** error)
545 struct stat file_status;
546 GstRegistry *registry;
547 gboolean new_plugin = TRUE;
549 g_return_val_if_fail (filename != NULL, NULL);
551 registry = gst_registry_get_default ();
552 g_static_mutex_lock (&gst_plugin_loading_mutex);
554 plugin = gst_registry_lookup (registry, filename);
556 if (plugin->module) {
558 g_static_mutex_unlock (&gst_plugin_loading_mutex);
561 /* load plugin and update fields */
566 GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING, "attempt to load plugin \"%s\"",
569 if (g_module_supported () == FALSE) {
570 GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING, "module loading not supported");
573 GST_PLUGIN_ERROR_MODULE, "Dynamic loading not supported");
577 if (g_stat (filename, &file_status)) {
578 GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING, "problem accessing file");
581 GST_PLUGIN_ERROR_MODULE, "Problem accessing file %s: %s", filename,
586 module = g_module_open (filename, G_MODULE_BIND_LOCAL);
587 if (module == NULL) {
588 GST_CAT_WARNING (GST_CAT_PLUGIN_LOADING, "module_open failed: %s",
591 GST_PLUGIN_ERROR, GST_PLUGIN_ERROR_MODULE, "Opening module failed: %s",
593 /* If we failed to open the shared object, then it's probably because a
594 * plugin is linked against the wrong libraries. Print out an easy-to-see
595 * message in this case. */
596 g_warning ("Failed to load plugin '%s': %s", filename, g_module_error ());
601 plugin = g_object_newv (GST_TYPE_PLUGIN, 0, NULL);
602 plugin->file_mtime = file_status.st_mtime;
603 plugin->file_size = file_status.st_size;
604 plugin->filename = g_strdup (filename);
605 plugin->basename = g_path_get_basename (filename);
607 plugin->module = module;
609 ret = g_module_symbol (module, "gst_plugin_desc", &ptr);
611 GST_DEBUG ("Could not find plugin entry point in \"%s\"", filename);
614 GST_PLUGIN_ERROR_MODULE,
615 "File \"%s\" is not a GStreamer plugin", filename);
616 g_module_close (module);
619 plugin->orig_desc = (GstPluginDesc *) ptr;
622 /* check plugin description: complain about bad values but accept them, to
623 * maintain backwards compatibility (FIXME: 0.11) */
624 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, name, filename);
625 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, description, filename);
626 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, version, filename);
627 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, license, filename);
628 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, source, filename);
629 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, package, filename);
630 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, origin, filename);
633 GST_LOG ("Plugin %p for file \"%s\" prepared, calling entry function...",
636 /* this is where we load the actual .so, so let's trap SIGSEGV */
637 _gst_plugin_fault_handler_setup ();
638 _gst_plugin_fault_handler_filename = plugin->filename;
640 GST_LOG ("Plugin %p for file \"%s\" prepared, registering...",
643 if (!gst_plugin_register_func (plugin, plugin->orig_desc, NULL)) {
644 /* remove signal handler */
645 _gst_plugin_fault_handler_restore ();
646 GST_DEBUG ("gst_plugin_register_func failed for plugin \"%s\"", filename);
650 GST_PLUGIN_ERROR_MODULE,
651 "File \"%s\" appears to be a GStreamer plugin, but it failed to initialize",
656 /* remove signal handler */
657 _gst_plugin_fault_handler_restore ();
658 _gst_plugin_fault_handler_filename = NULL;
659 GST_INFO ("plugin \"%s\" loaded", plugin->filename);
662 gst_object_ref (plugin);
663 gst_default_registry_add_plugin (plugin);
666 g_static_mutex_unlock (&gst_plugin_loading_mutex);
672 gst_object_unref (plugin);
673 g_static_mutex_unlock (&gst_plugin_loading_mutex);
679 gst_plugin_desc_copy (GstPluginDesc * dest, const GstPluginDesc * src)
681 dest->major_version = src->major_version;
682 dest->minor_version = src->minor_version;
683 dest->name = g_intern_string (src->name);
684 dest->description = g_intern_string (src->description);
685 dest->plugin_init = src->plugin_init;
686 dest->version = g_intern_string (src->version);
687 dest->license = g_intern_string (src->license);
688 dest->source = g_intern_string (src->source);
689 dest->package = g_intern_string (src->package);
690 dest->origin = g_intern_string (src->origin);
694 * gst_plugin_get_name:
695 * @plugin: plugin to get the name of
697 * Get the short name of the plugin
699 * Returns: the name of the plugin
702 gst_plugin_get_name (GstPlugin * plugin)
704 g_return_val_if_fail (plugin != NULL, NULL);
706 return plugin->desc.name;
710 * gst_plugin_get_description:
711 * @plugin: plugin to get long name of
713 * Get the long descriptive name of the plugin
715 * Returns: the long name of the plugin
717 G_CONST_RETURN gchar *
718 gst_plugin_get_description (GstPlugin * plugin)
720 g_return_val_if_fail (plugin != NULL, NULL);
722 return plugin->desc.description;
726 * gst_plugin_get_filename:
727 * @plugin: plugin to get the filename of
729 * get the filename of the plugin
731 * Returns: the filename of the plugin
733 G_CONST_RETURN gchar *
734 gst_plugin_get_filename (GstPlugin * plugin)
736 g_return_val_if_fail (plugin != NULL, NULL);
738 return plugin->filename;
742 * gst_plugin_get_version:
743 * @plugin: plugin to get the version of
745 * get the version of the plugin
747 * Returns: the version of the plugin
749 G_CONST_RETURN gchar *
750 gst_plugin_get_version (GstPlugin * plugin)
752 g_return_val_if_fail (plugin != NULL, NULL);
754 return plugin->desc.version;
758 * gst_plugin_get_license:
759 * @plugin: plugin to get the license of
761 * get the license of the plugin
763 * Returns: the license of the plugin
765 G_CONST_RETURN gchar *
766 gst_plugin_get_license (GstPlugin * plugin)
768 g_return_val_if_fail (plugin != NULL, NULL);
770 return plugin->desc.license;
774 * gst_plugin_get_source:
775 * @plugin: plugin to get the source of
777 * get the source module the plugin belongs to.
779 * Returns: the source of the plugin
781 G_CONST_RETURN gchar *
782 gst_plugin_get_source (GstPlugin * plugin)
784 g_return_val_if_fail (plugin != NULL, NULL);
786 return plugin->desc.source;
790 * gst_plugin_get_package:
791 * @plugin: plugin to get the package of
793 * get the package the plugin belongs to.
795 * Returns: the package of the plugin
797 G_CONST_RETURN gchar *
798 gst_plugin_get_package (GstPlugin * plugin)
800 g_return_val_if_fail (plugin != NULL, NULL);
802 return plugin->desc.package;
806 * gst_plugin_get_origin:
807 * @plugin: plugin to get the origin of
809 * get the URL where the plugin comes from
811 * Returns: the origin of the plugin
813 G_CONST_RETURN gchar *
814 gst_plugin_get_origin (GstPlugin * plugin)
816 g_return_val_if_fail (plugin != NULL, NULL);
818 return plugin->desc.origin;
822 * gst_plugin_get_module:
823 * @plugin: plugin to query
825 * Gets the #GModule of the plugin. If the plugin isn't loaded yet, NULL is
828 * Returns: module belonging to the plugin or NULL if the plugin isn't
832 gst_plugin_get_module (GstPlugin * plugin)
834 g_return_val_if_fail (plugin != NULL, NULL);
836 return plugin->module;
840 * gst_plugin_is_loaded:
841 * @plugin: plugin to query
843 * queries if the plugin is loaded into memory
845 * Returns: TRUE is loaded, FALSE otherwise
848 gst_plugin_is_loaded (GstPlugin * plugin)
850 g_return_val_if_fail (plugin != NULL, FALSE);
852 return (plugin->module != NULL || plugin->filename == NULL);
856 * gst_plugin_get_cache_data:
859 * Gets the plugin specific data cache. If it is %NULL there is no cached data
860 * stored. This is the case when the registry is getting rebuilt.
862 * Returns: The cached data as a #GstStructure or %NULL.
866 G_CONST_RETURN GstStructure *
867 gst_plugin_get_cache_data (GstPlugin * plugin)
869 g_return_val_if_fail (GST_IS_PLUGIN (plugin), NULL);
871 return plugin->priv->cache_data;
875 * gst_plugin_set_cache_data:
877 * @cache_data: a structure containing the data to cache
879 * Adds plugin specific data to cache. Passes the ownership of the structure to
882 * The cache is flushed every time the registry is rebuilt.
887 gst_plugin_set_cache_data (GstPlugin * plugin, GstStructure * cache_data)
889 g_return_if_fail (GST_IS_PLUGIN (plugin));
890 g_return_if_fail (GST_IS_STRUCTURE (cache_data));
892 if (plugin->priv->cache_data) {
893 gst_structure_free (plugin->priv->cache_data);
895 plugin->priv->cache_data = cache_data;
900 * gst_plugin_feature_list:
901 * @plugin: plugin to query
902 * @filter: the filter to use
903 * @first: only return first match
904 * @user_data: user data passed to the filter function
906 * Runs a filter against all plugin features and returns a GList with
907 * the results. If the first flag is set, only the first match is
908 * returned (as a list with a single object).
910 * Returns: a GList of features, g_list_free after use.
913 gst_plugin_feature_filter (GstPlugin * plugin,
914 GstPluginFeatureFilter filter, gboolean first, gpointer user_data)
919 list = gst_filter_run (plugin->features, (GstFilterFunc) filter, first,
921 for (g = list; g; g = g->next) {
922 gst_object_ref (plugin);
930 GstPluginFeatureFilter filter;
938 _feature_filter (GstPlugin * plugin, gpointer user_data)
941 FeatureFilterData *data = (FeatureFilterData *) user_data;
943 result = gst_plugin_feature_filter (plugin, data->filter, data->first,
946 data->result = g_list_concat (data->result, result);
953 * gst_plugin_list_feature_filter:
954 * @list: a #GList of plugins to query
955 * @filter: the filter function to use
956 * @first: only return first match
957 * @user_data: user data passed to the filter function
959 * Runs a filter against all plugin features of the plugins in the given
960 * list and returns a GList with the results.
961 * If the first flag is set, only the first match is
962 * returned (as a list with a single object).
964 * Returns: a GList of features, g_list_free after use.
967 gst_plugin_list_feature_filter (GList * list,
968 GstPluginFeatureFilter filter, gboolean first, gpointer user_data)
970 FeatureFilterData data;
973 data.filter = filter;
975 data.user_data = user_data;
978 result = gst_filter_run (list, (GstFilterFunc) _feature_filter, first, &data);
979 g_list_free (result);
986 * gst_plugin_name_filter:
987 * @plugin: the plugin to check
988 * @name: the name of the plugin
990 * A standard filter that returns TRUE when the plugin is of the
993 * Returns: TRUE if the plugin is of the given name.
996 gst_plugin_name_filter (GstPlugin * plugin, const gchar * name)
998 return (plugin->desc.name && !strcmp (plugin->desc.name, name));
1003 * gst_plugin_find_feature:
1004 * @plugin: plugin to get the feature from
1005 * @name: The name of the feature to find
1006 * @type: The type of the feature to find
1008 * Find a feature of the given name and type in the given plugin.
1010 * Returns: a GstPluginFeature or NULL if the feature was not found.
1013 gst_plugin_find_feature (GstPlugin * plugin, const gchar * name, GType type)
1016 GstPluginFeature *result = NULL;
1017 GstTypeNameData data;
1019 g_return_val_if_fail (name != NULL, NULL);
1024 walk = gst_filter_run (plugin->features,
1025 (GstFilterFunc) gst_plugin_feature_type_name_filter, TRUE, &data);
1028 result = GST_PLUGIN_FEATURE (walk->data);
1030 gst_object_ref (result);
1031 gst_plugin_feature_list_free (walk);
1040 gst_plugin_feature_name_filter (GstPluginFeature * feature, const gchar * name)
1042 return !strcmp (name, GST_PLUGIN_FEATURE_NAME (feature));
1048 * gst_plugin_find_feature_by_name:
1049 * @plugin: plugin to get the feature from
1050 * @name: The name of the feature to find
1052 * Find a feature of the given name in the given plugin.
1054 * Returns: a GstPluginFeature or NULL if the feature was not found.
1057 gst_plugin_find_feature_by_name (GstPlugin * plugin, const gchar * name)
1060 GstPluginFeature *result = NULL;
1062 g_return_val_if_fail (name != NULL, NULL);
1064 walk = gst_filter_run (plugin->features,
1065 (GstFilterFunc) gst_plugin_feature_name_filter, TRUE, (void *) name);
1068 result = GST_PLUGIN_FEATURE (walk->data);
1070 gst_object_ref (result);
1071 gst_plugin_feature_list_free (walk);
1079 * gst_plugin_load_by_name:
1080 * @name: name of plugin to load
1082 * Load the named plugin. Refs the plugin.
1084 * Returns: A reference to a loaded plugin, or NULL on error.
1087 gst_plugin_load_by_name (const gchar * name)
1089 GstPlugin *plugin, *newplugin;
1090 GError *error = NULL;
1092 GST_DEBUG ("looking up plugin %s in default registry", name);
1093 plugin = gst_registry_find_plugin (gst_registry_get_default (), name);
1095 GST_DEBUG ("loading plugin %s from file %s", name, plugin->filename);
1096 newplugin = gst_plugin_load_file (plugin->filename, &error);
1097 gst_object_unref (plugin);
1100 GST_WARNING ("load_plugin error: %s", error->message);
1101 g_error_free (error);
1104 /* newplugin was reffed by load_file */
1108 GST_DEBUG ("Could not find plugin %s in registry", name);
1114 * @plugin: plugin to load
1116 * Loads @plugin. Note that the *return value* is the loaded plugin; @plugin is
1117 * untouched. The normal use pattern of this function goes like this:
1120 * GstPlugin *loaded_plugin;
1121 * loaded_plugin = gst_plugin_load (plugin);
1122 * // presumably, we're no longer interested in the potentially-unloaded plugin
1123 * gst_object_unref (plugin);
1124 * plugin = loaded_plugin;
1127 * Returns: A reference to a loaded plugin, or NULL on error.
1130 gst_plugin_load (GstPlugin * plugin)
1132 GError *error = NULL;
1133 GstPlugin *newplugin;
1135 if (gst_plugin_is_loaded (plugin)) {
1139 if (!(newplugin = gst_plugin_load_file (plugin->filename, &error)))
1146 GST_WARNING ("load_plugin error: %s", error->message);
1147 g_error_free (error);
1153 * gst_plugin_list_free:
1154 * @list: list of #GstPlugin
1156 * Unrefs each member of @list, then frees the list.
1159 gst_plugin_list_free (GList * list)
1163 for (g = list; g; g = g->next) {
1164 gst_object_unref (GST_PLUGIN_CAST (g->data));
1169 /* ===== plugin dependencies ===== */
1172 * ENV + xyz where ENV can contain multiple values separated by SEPARATOR
1173 * xyz may be "" (if ENV contains path to file rather than dir)
1174 * ENV + *xyz same as above, but xyz acts as suffix filter
1175 * ENV + xyz* same as above, but xyz acts as prefix filter (is this needed?)
1176 * ENV + *xyz* same as above, but xyz acts as strstr filter (is this needed?)
1178 * same as above, with additional paths hard-coded at compile-time:
1179 * - only check paths + ... if ENV is not set or yields not paths
1180 * - always check paths + ... in addition to ENV
1182 * When user specifies set of environment variables, he/she may also use e.g.
1183 * "HOME/.mystuff/plugins", and we'll expand the content of $HOME with the
1187 /* we store in registry:
1190 * - environment variables (array of strings)
1191 * - last hash of env variable contents (uint) (so we can avoid doing stats
1192 * if one of the env vars has changed; premature optimisation galore)
1193 * - hard-coded paths (array of strings)
1194 * - xyz filename/suffix/prefix strings (array of strings)
1196 * - last hash of file/dir stats (int)
1198 * (= struct GstPluginDep)
1202 gst_plugin_ext_dep_get_env_vars_hash (GstPlugin * plugin, GstPluginDep * dep)
1207 /* there's no deeper logic to what we do here; all we want to know (when
1208 * checking if the plugin needs to be rescanned) is whether the content of
1209 * one of the environment variables in the list is different from when it
1210 * was last scanned */
1212 for (e = dep->env_vars; e != NULL && *e != NULL; ++e) {
1216 /* order matters: "val",NULL needs to yield a different hash than
1217 * NULL,"val", so do a shift here whether the var is set or not */
1220 /* want environment variable at beginning of string */
1221 if (!g_ascii_isalnum (**e)) {
1222 GST_WARNING_OBJECT (plugin, "string prefix is not a valid environment "
1223 "variable string: %s", *e);
1227 /* user is allowed to specify e.g. "HOME/.pitivi/plugins" */
1228 g_strlcpy (env_var, *e, sizeof (env_var));
1229 g_strdelimit (env_var, "/\\", '\0');
1231 if ((val = g_getenv (env_var)))
1232 hash += g_str_hash (val);
1239 _priv_plugin_deps_env_vars_changed (GstPlugin * plugin)
1243 for (l = plugin->priv->deps; l != NULL; l = l->next) {
1244 GstPluginDep *dep = l->data;
1246 if (dep->env_hash != gst_plugin_ext_dep_get_env_vars_hash (plugin, dep))
1254 gst_plugin_ext_dep_extract_env_vars_paths (GstPlugin * plugin,
1258 GList *paths = NULL;
1260 for (evars = dep->env_vars; evars != NULL && *evars != NULL; ++evars) {
1264 /* want environment variable at beginning of string */
1265 if (!g_ascii_isalnum (**evars)) {
1266 GST_WARNING_OBJECT (plugin, "string prefix is not a valid environment "
1267 "variable string: %s", *evars);
1271 /* user is allowed to specify e.g. "HOME/.pitivi/plugins", which we want to
1272 * split into the env_var name component and the path component */
1273 components = g_strsplit_set (*evars, "/\\", 2);
1274 g_assert (components != NULL);
1276 e = g_getenv (components[0]);
1277 GST_LOG_OBJECT (plugin, "expanding %s = '%s' (path suffix: %s)",
1278 components[0], GST_STR_NULL (e), GST_STR_NULL (components[1]));
1280 if (components[1] != NULL) {
1281 g_strdelimit (components[1], "/\\", G_DIR_SEPARATOR);
1284 if (e != NULL && *e != '\0') {
1288 arr = g_strsplit (e, G_SEARCHPATH_SEPARATOR_S, -1);
1290 for (i = 0; arr != NULL && arr[i] != NULL; ++i) {
1293 if (!g_path_is_absolute (arr[i])) {
1294 GST_INFO_OBJECT (plugin, "ignoring environment variable content '%s'"
1295 ": either not an absolute path or not a path at all", arr[i]);
1299 if (components[1] != NULL) {
1300 full_path = g_build_filename (arr[i], components[1], NULL);
1302 full_path = g_strdup (arr[i]);
1305 if (!g_list_find_custom (paths, full_path, (GCompareFunc) strcmp)) {
1306 GST_LOG_OBJECT (plugin, "path: '%s'", full_path);
1307 paths = g_list_prepend (paths, full_path);
1310 GST_LOG_OBJECT (plugin, "path: '%s' (duplicate,ignoring)", full_path);
1318 g_strfreev (components);
1321 GST_LOG_OBJECT (plugin, "Extracted %d paths from environment",
1322 g_list_length (paths));
1328 gst_plugin_ext_dep_get_hash_from_stat_entry (struct stat *s)
1330 if (!(s->st_mode & (S_IFDIR | S_IFREG)))
1333 /* completely random formula */
1334 return ((s->st_size << 3) + (s->st_mtime << 5)) ^ s->st_ctime;
1338 gst_plugin_ext_dep_direntry_matches (GstPlugin * plugin, const gchar * entry,
1339 const gchar ** filenames, GstPluginDependencyFlags flags)
1341 /* no filenames specified, match all entries for now (could probably
1342 * optimise by just taking the dir stat hash or so) */
1343 if (filenames == NULL || *filenames == NULL || **filenames == '\0')
1346 while (*filenames != NULL) {
1348 if (((flags & GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_SUFFIX)) &&
1349 g_str_has_suffix (entry, *filenames)) {
1351 /* else it's an exact match that's needed */
1352 } else if (strcmp (entry, *filenames) == 0) {
1355 GST_LOG ("%s does not match %s, flags=0x%04x", entry, *filenames, flags);
1362 gst_plugin_ext_dep_scan_dir_and_match_names (GstPlugin * plugin,
1363 const gchar * path, const gchar ** filenames,
1364 GstPluginDependencyFlags flags, int depth)
1367 gboolean recurse_dirs;
1372 recurse_dirs = !!(flags & GST_PLUGIN_DEPENDENCY_FLAG_RECURSE);
1374 dir = g_dir_open (path, 0, &err);
1376 GST_DEBUG_OBJECT (plugin, "g_dir_open(%s) failed: %s", path, err->message);
1381 /* FIXME: we're assuming here that we always get the directory entries in
1382 * the same order, and not in a random order */
1383 while ((entry = g_dir_read_name (dir))) {
1384 gboolean have_match;
1390 gst_plugin_ext_dep_direntry_matches (plugin, entry, filenames, flags);
1392 /* avoid the stat if possible */
1393 if (!have_match && !recurse_dirs)
1396 full_path = g_build_filename (path, entry, NULL);
1397 if (g_stat (full_path, &s) < 0) {
1398 fhash = (guint) - 1;
1399 GST_LOG_OBJECT (plugin, "stat: %s (error: %s)", full_path,
1400 g_strerror (errno));
1401 } else if (have_match) {
1402 fhash = gst_plugin_ext_dep_get_hash_from_stat_entry (&s);
1403 GST_LOG_OBJECT (plugin, "stat: %s (result: %u)", full_path, fhash);
1404 } else if ((s.st_mode & (S_IFDIR))) {
1405 fhash = gst_plugin_ext_dep_scan_dir_and_match_names (plugin, full_path,
1406 filenames, flags, depth + 1);
1408 /* it's not a name match, we want to recurse, but it's not a directory */
1413 hash = (hash + fhash) << 1;
1422 gst_plugin_ext_dep_scan_path_with_filenames (GstPlugin * plugin,
1423 const gchar * path, const gchar ** filenames,
1424 GstPluginDependencyFlags flags)
1426 const gchar *empty_filenames[] = { "", NULL };
1427 gboolean recurse_into_dirs, partial_names;
1430 /* to avoid special-casing below (FIXME?) */
1431 if (filenames == NULL || *filenames == NULL)
1432 filenames = empty_filenames;
1434 recurse_into_dirs = !!(flags & GST_PLUGIN_DEPENDENCY_FLAG_RECURSE);
1435 partial_names = !!(flags & GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_SUFFIX);
1437 /* if we can construct the exact paths to check with the data we have, just
1438 * stat them one by one; this is more efficient than opening the directory
1439 * and going through each entry to see if it matches one of our filenames. */
1440 if (!recurse_into_dirs && !partial_names) {
1441 for (i = 0; filenames[i] != NULL; ++i) {
1446 full_path = g_build_filename (path, filenames[i], NULL);
1447 if (g_stat (full_path, &s) < 0) {
1448 fhash = (guint) - 1;
1449 GST_LOG_OBJECT (plugin, "stat: %s (error: %s)", full_path,
1450 g_strerror (errno));
1452 fhash = gst_plugin_ext_dep_get_hash_from_stat_entry (&s);
1453 GST_LOG_OBJECT (plugin, "stat: %s (result: %08x)", full_path, fhash);
1455 hash = (hash + fhash) << 1;
1459 hash = gst_plugin_ext_dep_scan_dir_and_match_names (plugin, path,
1460 filenames, flags, 0);
1467 gst_plugin_ext_dep_get_stat_hash (GstPlugin * plugin, GstPluginDep * dep)
1469 gboolean paths_are_default_only;
1471 guint scan_hash = 0;
1473 GST_LOG_OBJECT (plugin, "start");
1475 paths_are_default_only =
1476 dep->flags & GST_PLUGIN_DEPENDENCY_FLAG_PATHS_ARE_DEFAULT_ONLY;
1478 scan_paths = gst_plugin_ext_dep_extract_env_vars_paths (plugin, dep);
1480 if (scan_paths == NULL || !paths_are_default_only) {
1483 for (paths = dep->paths; paths != NULL && *paths != NULL; ++paths) {
1484 const gchar *path = *paths;
1486 if (!g_list_find_custom (scan_paths, path, (GCompareFunc) strcmp)) {
1487 GST_LOG_OBJECT (plugin, "path: '%s'", path);
1488 scan_paths = g_list_prepend (scan_paths, g_strdup (path));
1490 GST_LOG_OBJECT (plugin, "path: '%s' (duplicate, ignoring)", path);
1495 /* not that the order really matters, but it makes debugging easier */
1496 scan_paths = g_list_reverse (scan_paths);
1498 while (scan_paths != NULL) {
1499 const gchar *path = scan_paths->data;
1501 scan_hash += gst_plugin_ext_dep_scan_path_with_filenames (plugin, path,
1502 (const gchar **) dep->names, dep->flags);
1503 scan_hash = scan_hash << 1;
1505 g_free (scan_paths->data);
1506 scan_paths = g_list_delete_link (scan_paths, scan_paths);
1509 GST_LOG_OBJECT (plugin, "done, scan_hash: %08x", scan_hash);
1514 _priv_plugin_deps_files_changed (GstPlugin * plugin)
1518 for (l = plugin->priv->deps; l != NULL; l = l->next) {
1519 GstPluginDep *dep = l->data;
1521 if (dep->stat_hash != gst_plugin_ext_dep_get_stat_hash (plugin, dep))
1529 gst_plugin_ext_dep_free (GstPluginDep * dep)
1531 g_strfreev (dep->env_vars);
1532 g_strfreev (dep->paths);
1533 g_strfreev (dep->names);
1534 g_slice_free (GstPluginDep, dep);
1538 gst_plugin_ext_dep_strv_equal (gchar ** arr1, gchar ** arr2)
1542 if (arr1 == NULL || arr2 == NULL)
1544 for (; *arr1 != NULL && *arr2 != NULL; ++arr1, ++arr2) {
1545 if (strcmp (*arr1, *arr2) != 0)
1548 return (*arr1 == *arr2);
1552 gst_plugin_ext_dep_equals (GstPluginDep * dep, const gchar ** env_vars,
1553 const gchar ** paths, const gchar ** names, GstPluginDependencyFlags flags)
1555 if (dep->flags != flags)
1558 return gst_plugin_ext_dep_strv_equal (dep->env_vars, (gchar **) env_vars) &&
1559 gst_plugin_ext_dep_strv_equal (dep->paths, (gchar **) paths) &&
1560 gst_plugin_ext_dep_strv_equal (dep->names, (gchar **) names);
1564 * gst_plugin_add_dependency:
1565 * @plugin: a #GstPlugin
1566 * @env_vars: NULL-terminated array of environent variables affecting the
1567 * feature set of the plugin (e.g. an environment variable containing
1568 * paths where to look for additional modules/plugins of a library),
1569 * or NULL. Environment variable names may be followed by a path component
1570 * which will be added to the content of the environment variable, e.g.
1571 * "HOME/.mystuff/plugins".
1572 * @paths: NULL-terminated array of directories/paths where dependent files
1574 * @names: NULL-terminated array of file names (or file name suffixes,
1575 * depending on @flags) to be used in combination with the paths from
1576 * @paths and/or the paths extracted from the environment variables in
1577 * @env_vars, or NULL.
1578 * @flags: optional flags, or #GST_PLUGIN_DEPENDENCY_FLAG_NONE
1580 * Make GStreamer aware of external dependencies which affect the feature
1581 * set of this plugin (ie. the elements or typefinders associated with it).
1583 * GStreamer will re-inspect plugins with external dependencies whenever any
1584 * of the external dependencies change. This is useful for plugins which wrap
1585 * other plugin systems, e.g. a plugin which wraps a plugin-based visualisation
1586 * library and makes visualisations available as GStreamer elements, or a
1587 * codec loader which exposes elements and/or caps dependent on what external
1588 * codec libraries are currently installed.
1593 gst_plugin_add_dependency (GstPlugin * plugin, const gchar ** env_vars,
1594 const gchar ** paths, const gchar ** names, GstPluginDependencyFlags flags)
1599 g_return_if_fail (GST_IS_PLUGIN (plugin));
1601 if ((env_vars == NULL || env_vars[0] == NULL) &&
1602 (paths == NULL || paths[0] == NULL)) {
1603 GST_DEBUG_OBJECT (plugin,
1604 "plugin registered empty dependency set. Ignoring");
1608 for (l = plugin->priv->deps; l != NULL; l = l->next) {
1609 if (gst_plugin_ext_dep_equals (l->data, env_vars, paths, names, flags)) {
1610 GST_LOG_OBJECT (plugin, "dependency already registered");
1615 dep = g_slice_new (GstPluginDep);
1617 dep->env_vars = g_strdupv ((gchar **) env_vars);
1618 dep->paths = g_strdupv ((gchar **) paths);
1619 dep->names = g_strdupv ((gchar **) names);
1622 dep->env_hash = gst_plugin_ext_dep_get_env_vars_hash (plugin, dep);
1623 dep->stat_hash = gst_plugin_ext_dep_get_stat_hash (plugin, dep);
1625 plugin->priv->deps = g_list_append (plugin->priv->deps, dep);
1627 GST_DEBUG_OBJECT (plugin, "added dependency:");
1628 for (; env_vars != NULL && *env_vars != NULL; ++env_vars)
1629 GST_DEBUG_OBJECT (plugin, " evar: %s", *env_vars);
1630 for (; paths != NULL && *paths != NULL; ++paths)
1631 GST_DEBUG_OBJECT (plugin, " path: %s", *paths);
1632 for (; names != NULL && *names != NULL; ++names)
1633 GST_DEBUG_OBJECT (plugin, " name: %s", *names);
1637 * gst_plugin_add_dependency_simple:
1638 * @plugin: the #GstPlugin
1639 * @env_vars: one or more environent variables (separated by ':', ';' or ','),
1640 * or NULL. Environment variable names may be followed by a path component
1641 * which will be added to the content of the environment variable, e.g.
1642 * "HOME/.mystuff/plugins:MYSTUFF_PLUGINS_PATH"
1643 * @paths: one ore more directory paths (separated by ':' or ';' or ','),
1644 * or NULL. Example: "/usr/lib/mystuff/plugins"
1645 * @names: one or more file names or file name suffixes (separated by commas),
1647 * @flags: optional flags, or #GST_PLUGIN_DEPENDENCY_FLAG_NONE
1649 * Make GStreamer aware of external dependencies which affect the feature
1650 * set of this plugin (ie. the elements or typefinders associated with it).
1652 * GStreamer will re-inspect plugins with external dependencies whenever any
1653 * of the external dependencies change. This is useful for plugins which wrap
1654 * other plugin systems, e.g. a plugin which wraps a plugin-based visualisation
1655 * library and makes visualisations available as GStreamer elements, or a
1656 * codec loader which exposes elements and/or caps dependent on what external
1657 * codec libraries are currently installed.
1659 * Convenience wrapper function for gst_plugin_add_dependency() which
1660 * takes simple strings as arguments instead of string arrays, with multiple
1661 * arguments separated by predefined delimiters (see above).
1666 gst_plugin_add_dependency_simple (GstPlugin * plugin,
1667 const gchar * env_vars, const gchar * paths, const gchar * names,
1668 GstPluginDependencyFlags flags)
1670 gchar **a_evars = NULL;
1671 gchar **a_paths = NULL;
1672 gchar **a_names = NULL;
1675 a_evars = g_strsplit_set (env_vars, ":;,", -1);
1677 a_paths = g_strsplit_set (paths, ":;,", -1);
1679 a_names = g_strsplit_set (names, ",", -1);
1681 gst_plugin_add_dependency (plugin, (const gchar **) a_evars,
1682 (const gchar **) a_paths, (const gchar **) a_names, flags);
1685 g_strfreev (a_evars);
1687 g_strfreev (a_paths);
1689 g_strfreev (a_names);