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., 51 Franklin St, Fifth Floor,
20 * Boston, MA 02110-1301, 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 automatically 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>
67 #include "glib-compat-private.h"
71 #define GST_CAT_DEFAULT GST_CAT_PLUGIN_LOADING
73 static guint _num_static_plugins; /* 0 */
74 static GstPluginDesc *_static_plugins; /* NULL */
75 static gboolean _gst_plugin_inited;
76 static gchar **_plugin_loading_whitelist; /* NULL */
78 /* static variables for segfault handling of plugin loading */
79 static char *_gst_plugin_fault_handler_filename = NULL;
81 /* list of valid licenses.
82 * One of these must be specified or the plugin won't be loaded
83 * Contact gstreamer-devel@lists.sourceforge.net if your license should be
86 * GPL: http://www.gnu.org/copyleft/gpl.html
87 * LGPL: http://www.gnu.org/copyleft/lesser.html
88 * QPL: http://www.trolltech.com/licenses/qpl.html
89 * MPL: http://www.opensource.org/licenses/mozilla1.1.php
90 * MIT/X11: http://www.opensource.org/licenses/mit-license.php
91 * 3-clause BSD: http://www.opensource.org/licenses/bsd-license.php
93 static const gchar valid_licenses[] = "LGPL\000" /* GNU Lesser General Public License */
94 "GPL\000" /* GNU General Public License */
95 "QPL\000" /* Trolltech Qt Public License */
96 "GPL/QPL\000" /* Combi-license of GPL + QPL */
97 "MPL\000" /* MPL 1.1 license */
98 "BSD\000" /* 3-clause BSD license */
99 "MIT/X11\000" /* MIT/X11 license */
100 "Proprietary\000" /* Proprietary license */
101 GST_LICENSE_UNKNOWN; /* some other license */
103 static const guint8 valid_licenses_idx[] = { 0, 5, 9, 13, 21, 25, 29, 37, 49 };
105 static GstPlugin *gst_plugin_register_func (GstPlugin * plugin,
106 const GstPluginDesc * desc, gpointer user_data);
107 static void gst_plugin_desc_copy (GstPluginDesc * dest,
108 const GstPluginDesc * src);
110 static void gst_plugin_ext_dep_free (GstPluginDep * dep);
112 G_DEFINE_TYPE (GstPlugin, gst_plugin, GST_TYPE_OBJECT);
115 gst_plugin_init (GstPlugin * plugin)
118 G_TYPE_INSTANCE_GET_PRIVATE (plugin, GST_TYPE_PLUGIN, GstPluginPrivate);
122 gst_plugin_finalize (GObject * object)
124 GstPlugin *plugin = GST_PLUGIN_CAST (object);
126 GST_DEBUG ("finalizing plugin %" GST_PTR_FORMAT, plugin);
128 /* FIXME: make registry add a weak ref instead */
130 GstRegistry *registry = gst_registry_get ();
132 for (g = registry->plugins; g; g = g->next) {
133 if (g->data == (gpointer) plugin) {
134 g_warning ("removing plugin that is still in registry");
139 g_free (plugin->filename);
140 g_free (plugin->basename);
142 g_list_foreach (plugin->priv->deps, (GFunc) gst_plugin_ext_dep_free, NULL);
143 g_list_free (plugin->priv->deps);
144 plugin->priv->deps = NULL;
146 if (plugin->priv->cache_data) {
147 gst_structure_free (plugin->priv->cache_data);
150 G_OBJECT_CLASS (gst_plugin_parent_class)->finalize (object);
154 gst_plugin_class_init (GstPluginClass * klass)
156 G_OBJECT_CLASS (klass)->finalize = gst_plugin_finalize;
158 g_type_class_add_private (klass, sizeof (GstPluginPrivate));
162 gst_plugin_error_quark (void)
164 static GQuark quark = 0;
167 quark = g_quark_from_static_string ("gst_plugin_error");
172 * gst_plugin_register_static:
173 * @major_version: the major version number of the GStreamer core that the
174 * plugin was compiled for, you can just use GST_VERSION_MAJOR here
175 * @minor_version: the minor version number of the GStreamer core that the
176 * plugin was compiled for, you can just use GST_VERSION_MINOR here
177 * @name: a unique name of the plugin (ideally prefixed with an application- or
178 * library-specific namespace prefix in order to avoid name conflicts in
179 * case a similar plugin with the same name ever gets added to GStreamer)
180 * @description: description of the plugin
181 * @init_func: (scope call): pointer to the init function of this plugin.
182 * @version: version string of the plugin
183 * @license: effective license of plugin. Must be one of the approved licenses
184 * (see #GstPluginDesc above) or the plugin will not be registered.
185 * @source: source module plugin belongs to
186 * @package: shipped package plugin belongs to
187 * @origin: URL to provider of plugin
189 * Registers a static plugin, ie. a plugin which is private to an application
190 * or library and contained within the application or library (as opposed to
191 * being shipped as a separate module file).
193 * You must make sure that GStreamer has been initialised (with gst_init() or
194 * via gst_init_get_option_group()) before calling this function.
196 * Returns: %TRUE if the plugin was registered correctly, otherwise %FALSE.
199 gst_plugin_register_static (gint major_version, gint minor_version,
200 const gchar * name, const gchar * description, GstPluginInitFunc init_func,
201 const gchar * version, const gchar * license, const gchar * source,
202 const gchar * package, const gchar * origin)
204 GstPluginDesc desc = { major_version, minor_version, name, description,
205 init_func, version, license, source, package, origin, NULL,
208 gboolean res = FALSE;
210 g_return_val_if_fail (name != NULL, FALSE);
211 g_return_val_if_fail (description != NULL, FALSE);
212 g_return_val_if_fail (init_func != NULL, FALSE);
213 g_return_val_if_fail (version != NULL, FALSE);
214 g_return_val_if_fail (license != NULL, FALSE);
215 g_return_val_if_fail (source != NULL, FALSE);
216 g_return_val_if_fail (package != NULL, FALSE);
217 g_return_val_if_fail (origin != NULL, FALSE);
219 /* make sure gst_init() has been called */
220 g_return_val_if_fail (_gst_plugin_inited != FALSE, FALSE);
222 GST_LOG ("attempting to load static plugin \"%s\" now...", name);
223 plugin = g_object_newv (GST_TYPE_PLUGIN, 0, NULL);
224 if (gst_plugin_register_func (plugin, &desc, NULL) != NULL) {
225 GST_INFO ("registered static plugin \"%s\"", name);
226 res = gst_registry_add_plugin (gst_registry_get (), plugin);
227 GST_INFO ("added static plugin \"%s\", result: %d", name, res);
233 * gst_plugin_register_static_full:
234 * @major_version: the major version number of the GStreamer core that the
235 * plugin was compiled for, you can just use GST_VERSION_MAJOR here
236 * @minor_version: the minor version number of the GStreamer core that the
237 * plugin was compiled for, you can just use GST_VERSION_MINOR here
238 * @name: a unique name of the plugin (ideally prefixed with an application- or
239 * library-specific namespace prefix in order to avoid name conflicts in
240 * case a similar plugin with the same name ever gets added to GStreamer)
241 * @description: description of the plugin
242 * @init_full_func: (scope call): pointer to the init function with user data
244 * @version: version string of the plugin
245 * @license: effective license of plugin. Must be one of the approved licenses
246 * (see #GstPluginDesc above) or the plugin will not be registered.
247 * @source: source module plugin belongs to
248 * @package: shipped package plugin belongs to
249 * @origin: URL to provider of plugin
250 * @user_data: gpointer to user data
252 * Registers a static plugin, ie. a plugin which is private to an application
253 * or library and contained within the application or library (as opposed to
254 * being shipped as a separate module file) with a #GstPluginInitFullFunc
255 * which allows user data to be passed to the callback function (useful
258 * You must make sure that GStreamer has been initialised (with gst_init() or
259 * via gst_init_get_option_group()) before calling this function.
261 * Returns: %TRUE if the plugin was registered correctly, otherwise %FALSE.
264 gst_plugin_register_static_full (gint major_version, gint minor_version,
265 const gchar * name, const gchar * description,
266 GstPluginInitFullFunc init_full_func, const gchar * version,
267 const gchar * license, const gchar * source, const gchar * package,
268 const gchar * origin, gpointer user_data)
270 GstPluginDesc desc = { major_version, minor_version, name, description,
271 (GstPluginInitFunc) init_full_func, version, license, source, package,
275 gboolean res = FALSE;
277 g_return_val_if_fail (name != NULL, FALSE);
278 g_return_val_if_fail (description != NULL, FALSE);
279 g_return_val_if_fail (init_full_func != NULL, FALSE);
280 g_return_val_if_fail (version != NULL, FALSE);
281 g_return_val_if_fail (license != NULL, FALSE);
282 g_return_val_if_fail (source != NULL, FALSE);
283 g_return_val_if_fail (package != NULL, FALSE);
284 g_return_val_if_fail (origin != NULL, FALSE);
286 /* make sure gst_init() has been called */
287 g_return_val_if_fail (_gst_plugin_inited != FALSE, FALSE);
289 GST_LOG ("attempting to load static plugin \"%s\" now...", name);
290 plugin = g_object_newv (GST_TYPE_PLUGIN, 0, NULL);
291 if (gst_plugin_register_func (plugin, &desc, user_data) != NULL) {
292 GST_INFO ("registered static plugin \"%s\"", name);
293 res = gst_registry_add_plugin (gst_registry_get (), plugin);
294 GST_INFO ("added static plugin \"%s\", result: %d", name, res);
300 _priv_gst_plugin_initialize (void)
302 const gchar *whitelist;
305 _gst_plugin_inited = TRUE;
307 whitelist = g_getenv ("GST_PLUGIN_LOADING_WHITELIST");
308 if (whitelist != NULL && *whitelist != '\0') {
309 _plugin_loading_whitelist = g_strsplit (whitelist,
310 G_SEARCHPATH_SEPARATOR_S, -1);
311 for (i = 0; _plugin_loading_whitelist[i] != NULL; ++i) {
312 GST_INFO ("plugins whitelist entry: %s", _plugin_loading_whitelist[i]);
316 /* now register all static plugins */
317 GST_INFO ("registering %u static plugins", _num_static_plugins);
318 for (i = 0; i < _num_static_plugins; ++i) {
319 gst_plugin_register_static (_static_plugins[i].major_version,
320 _static_plugins[i].minor_version, _static_plugins[i].name,
321 _static_plugins[i].description, _static_plugins[i].plugin_init,
322 _static_plugins[i].version, _static_plugins[i].license,
323 _static_plugins[i].source, _static_plugins[i].package,
324 _static_plugins[i].origin);
327 if (_static_plugins) {
328 free (_static_plugins);
329 _static_plugins = NULL;
330 _num_static_plugins = 0;
334 /* Whitelist entry format:
336 * plugin1,plugin2@pathprefix or
337 * plugin1,plugin2@* or just
339 * source-package@pathprefix or
340 * source-package@* or just
343 * ie. the bit before the path will be checked against both the plugin
344 * name and the plugin's source package name, to keep the format simple.
347 gst_plugin_desc_matches_whitelist_entry (GstPluginDesc * desc,
348 const gchar * filename, const gchar * pattern)
351 gboolean ret = FALSE;
354 GST_LOG ("Whitelist pattern '%s', plugin: %s of %s@%s", pattern, desc->name,
355 desc->source, GST_STR_NULL (filename));
357 /* do we have a path prefix? */
358 sep = strchr (pattern, '@');
359 if (sep != NULL && strcmp (sep, "@*") != 0 && strcmp (sep, "@") != 0) {
360 /* paths are not canonicalised or treated with realpath() here. This
361 * should be good enough for our use case, since we just use the paths
362 * autotools uses, and those will be constructed from the same prefix. */
363 if (filename != NULL && !g_str_has_prefix (filename, sep + 1))
366 GST_LOG ("%s matches path prefix %s", GST_STR_NULL (filename), sep + 1);
370 name = g_strndup (pattern, (gsize) (sep - pattern));
372 name = g_strdup (pattern);
376 if (!g_ascii_isalnum (*name)) {
377 GST_WARNING ("Invalid whitelist pattern: %s", pattern);
381 /* now check plugin names / source package name */
382 if (strchr (name, ',') == NULL) {
383 /* only a single name: either a plugin name or the source package name */
384 ret = (strcmp (desc->source, name) == 0 || strcmp (desc->name, name) == 0);
388 /* multiple names: assume these are plugin names */
389 names = g_strsplit (name, ",", -1);
390 for (n = names; n != NULL && *n != NULL; ++n) {
392 if (strcmp (desc->name, *n) == 0) {
400 GST_LOG ("plugin / source package name match: %d", ret);
409 priv_gst_plugin_desc_is_whitelisted (GstPluginDesc * desc,
410 const gchar * filename)
414 if (_plugin_loading_whitelist == NULL)
417 for (entry = _plugin_loading_whitelist; *entry != NULL; ++entry) {
418 if (gst_plugin_desc_matches_whitelist_entry (desc, filename, *entry)) {
419 GST_LOG ("Plugin %s is in whitelist", filename);
424 GST_LOG ("Plugin %s (package %s, file %s) not in whitelist", desc->name,
425 desc->source, filename);
430 priv_gst_plugin_loading_have_whitelist (void)
432 return (_plugin_loading_whitelist != NULL);
436 priv_gst_plugin_loading_get_whitelist_hash (void)
440 if (_plugin_loading_whitelist != NULL) {
443 for (w = _plugin_loading_whitelist; *w != NULL; ++w)
444 hash = (hash << 1) ^ g_str_hash (*w);
450 /* this function could be extended to check if the plugin license matches the
451 * applications license (would require the app to register its license somehow).
452 * We'll wait for someone who's interested in it to code it :)
455 gst_plugin_check_license (const gchar * license)
459 for (i = 0; i < G_N_ELEMENTS (valid_licenses_idx); ++i) {
460 if (strcmp (license, valid_licenses + valid_licenses_idx[i]) == 0)
467 gst_plugin_check_version (gint major, gint minor)
469 /* return NULL if the major and minor version numbers are not compatible */
471 if (major != GST_VERSION_MAJOR || minor > GST_VERSION_MINOR)
478 gst_plugin_register_func (GstPlugin * plugin, const GstPluginDesc * desc,
481 if (!gst_plugin_check_version (desc->major_version, desc->minor_version)) {
483 GST_WARNING ("plugin \"%s\" has incompatible version "
484 "(plugin: %d.%d, gst: %d,%d), not loading",
485 GST_STR_NULL (plugin->filename), desc->major_version,
486 desc->minor_version, GST_VERSION_MAJOR, GST_VERSION_MINOR);
490 if (!desc->license || !desc->description || !desc->source ||
491 !desc->package || !desc->origin) {
493 GST_WARNING ("plugin \"%s\" has missing detail in GstPluginDesc, not "
494 "loading", GST_STR_NULL (plugin->filename));
498 if (!gst_plugin_check_license (desc->license)) {
500 GST_WARNING ("plugin \"%s\" has invalid license \"%s\", not loading",
501 GST_STR_NULL (plugin->filename), desc->license);
506 GST_LOG ("plugin \"%s\" looks good", GST_STR_NULL (plugin->filename));
508 gst_plugin_desc_copy (&plugin->desc, desc);
510 /* make resident so we're really sure it never gets unloaded again.
511 * Theoretically this is not needed, but practically it doesn't hurt.
512 * And we're rather safe than sorry. */
514 g_module_make_resident (plugin->module);
517 if (!(((GstPluginInitFullFunc) (desc->plugin_init)) (plugin, user_data))) {
519 GST_WARNING ("plugin \"%s\" failed to initialise",
520 GST_STR_NULL (plugin->filename));
524 if (!((desc->plugin_init) (plugin))) {
526 GST_WARNING ("plugin \"%s\" failed to initialise",
527 GST_STR_NULL (plugin->filename));
533 GST_LOG ("plugin \"%s\" initialised", GST_STR_NULL (plugin->filename));
538 #ifdef HAVE_SIGACTION
539 static struct sigaction oldaction;
540 static gboolean _gst_plugin_fault_handler_is_setup = FALSE;
543 * _gst_plugin_fault_handler_restore:
544 * segfault handler restorer
547 _gst_plugin_fault_handler_restore (void)
549 if (!_gst_plugin_fault_handler_is_setup)
552 _gst_plugin_fault_handler_is_setup = FALSE;
554 sigaction (SIGSEGV, &oldaction, NULL);
558 * _gst_plugin_fault_handler_sighandler:
559 * segfault handler implementation
562 _gst_plugin_fault_handler_sighandler (int signum)
564 /* We need to restore the fault handler or we'll keep getting it */
565 _gst_plugin_fault_handler_restore ();
569 g_print ("\nERROR: ");
570 g_print ("Caught a segmentation fault while loading plugin file:\n");
571 g_print ("%s\n\n", _gst_plugin_fault_handler_filename);
572 g_print ("Please either:\n");
573 g_print ("- remove it and restart.\n");
575 ("- run with --gst-disable-segtrap --gst-disable-registry-fork and debug.\n");
579 g_print ("Caught unhandled signal on plugin loading\n");
585 * _gst_plugin_fault_handler_setup:
586 * sets up the segfault handler
589 _gst_plugin_fault_handler_setup (void)
591 struct sigaction action;
593 /* if asked to leave segfaults alone, just return */
594 if (!gst_segtrap_is_enabled ())
597 if (_gst_plugin_fault_handler_is_setup)
600 _gst_plugin_fault_handler_is_setup = TRUE;
602 memset (&action, 0, sizeof (action));
603 action.sa_handler = _gst_plugin_fault_handler_sighandler;
605 sigaction (SIGSEGV, &action, &oldaction);
607 #else /* !HAVE_SIGACTION */
609 _gst_plugin_fault_handler_restore (void)
614 _gst_plugin_fault_handler_setup (void)
617 #endif /* HAVE_SIGACTION */
619 /* g_time_val_from_iso8601() doesn't do quite what we want */
621 check_release_datetime (const gchar * date_time)
625 /* we require YYYY-MM-DD or YYYY-MM-DDTHH:MMZ format */
626 if (!g_ascii_isdigit (*date_time))
629 val = g_ascii_strtoull (date_time, (gchar **) & date_time, 10);
630 if (val < 2000 || val > 2100 || *date_time != '-')
633 val = g_ascii_strtoull (date_time + 1, (gchar **) & date_time, 10);
634 if (val == 0 || val > 12 || *date_time != '-')
637 val = g_ascii_strtoull (date_time + 1, (gchar **) & date_time, 10);
638 if (val == 0 || val > 32)
641 /* end of string or date/time separator + HH:MMZ */
642 if (*date_time == 'T' || *date_time == ' ') {
643 val = g_ascii_strtoull (date_time + 1, (gchar **) & date_time, 10);
644 if (val > 24 || *date_time != ':')
647 val = g_ascii_strtoull (date_time + 1, (gchar **) & date_time, 10);
648 if (val > 59 || *date_time != 'Z')
654 return (*date_time == '\0');
657 static GMutex gst_plugin_loading_mutex;
659 #define CHECK_PLUGIN_DESC_FIELD(desc,field,fn) \
660 if (G_UNLIKELY ((desc)->field == NULL || *(desc)->field == '\0')) { \
661 g_warning ("Plugin description for '%s' has no valid %s field", fn, G_STRINGIFY (field)); \
662 g_set_error (error, GST_PLUGIN_ERROR, GST_PLUGIN_ERROR_MODULE, \
663 "Plugin %s has invalid plugin description field '%s'", \
664 filename, G_STRINGIFY (field)); \
669 * gst_plugin_load_file:
670 * @filename: the plugin filename to load
671 * @error: pointer to a %NULL-valued GError
673 * Loads the given plugin and refs it. Caller needs to unref after use.
675 * Returns: (transfer full): a reference to the existing loaded GstPlugin, a
676 * reference to the newly-loaded GstPlugin, or %NULL if an error occurred.
679 gst_plugin_load_file (const gchar * filename, GError ** error)
686 GStatBuf file_status;
687 GstRegistry *registry;
688 gboolean new_plugin = TRUE;
691 g_return_val_if_fail (filename != NULL, NULL);
693 registry = gst_registry_get ();
694 g_mutex_lock (&gst_plugin_loading_mutex);
696 plugin = gst_registry_lookup (registry, filename);
698 if (plugin->module) {
700 g_mutex_unlock (&gst_plugin_loading_mutex);
703 /* load plugin and update fields */
708 GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING, "attempt to load plugin \"%s\"",
711 if (!g_module_supported ()) {
712 GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING, "module loading not supported");
715 GST_PLUGIN_ERROR_MODULE, "Dynamic loading not supported");
719 if (g_stat (filename, &file_status)) {
720 GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING, "problem accessing file");
723 GST_PLUGIN_ERROR_MODULE, "Problem accessing file %s: %s", filename,
728 flags = G_MODULE_BIND_LOCAL;
729 /* libgstpython.so is the gst-python plugin loader. It needs to be loaded with
730 * G_MODULE_BIND_LAZY.
732 * Ideally there should be a generic way for plugins to specify that they
733 * need to be loaded with _LAZY.
735 if (strstr (filename, "libgstpython"))
736 flags |= G_MODULE_BIND_LAZY;
738 module = g_module_open (filename, flags);
739 if (module == NULL) {
740 GST_CAT_WARNING (GST_CAT_PLUGIN_LOADING, "module_open failed: %s",
743 GST_PLUGIN_ERROR, GST_PLUGIN_ERROR_MODULE, "Opening module failed: %s",
745 /* If we failed to open the shared object, then it's probably because a
746 * plugin is linked against the wrong libraries. Print out an easy-to-see
747 * message in this case. */
748 g_warning ("Failed to load plugin '%s': %s", filename, g_module_error ());
752 ret = g_module_symbol (module, "gst_plugin_desc", &ptr);
754 GST_DEBUG ("Could not find plugin entry point in \"%s\"", filename);
757 GST_PLUGIN_ERROR_MODULE,
758 "File \"%s\" is not a GStreamer plugin", filename);
759 g_module_close (module);
763 desc = (GstPluginDesc *) ptr;
765 if (priv_gst_plugin_loading_have_whitelist () &&
766 !priv_gst_plugin_desc_is_whitelisted (desc, filename)) {
767 GST_INFO ("Whitelist specified and plugin not in whitelist, not loading: "
768 "name=%s, package=%s, file=%s", desc->name, desc->source, filename);
769 g_set_error (error, GST_PLUGIN_ERROR, GST_PLUGIN_ERROR_MODULE,
770 "Not loading plugin file \"%s\", not in whitelist", filename);
771 g_module_close (module);
776 plugin = g_object_newv (GST_TYPE_PLUGIN, 0, NULL);
777 plugin->file_mtime = file_status.st_mtime;
778 plugin->file_size = file_status.st_size;
779 plugin->filename = g_strdup (filename);
780 plugin->basename = g_path_get_basename (filename);
783 plugin->module = module;
784 plugin->orig_desc = desc;
787 /* check plugin description: complain about bad values and fail */
788 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, name, filename);
789 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, description, filename);
790 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, version, filename);
791 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, license, filename);
792 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, source, filename);
793 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, package, filename);
794 CHECK_PLUGIN_DESC_FIELD (plugin->orig_desc, origin, filename);
796 if (plugin->orig_desc->name != NULL && plugin->orig_desc->name[0] == '"') {
797 g_warning ("Invalid plugin name '%s' - fix your GST_PLUGIN_DEFINE "
798 "(remove quotes around plugin name)", plugin->orig_desc->name);
801 if (plugin->orig_desc->release_datetime != NULL &&
802 !check_release_datetime (plugin->orig_desc->release_datetime)) {
803 GST_ERROR ("GstPluginDesc for '%s' has invalid datetime '%s'",
804 filename, plugin->orig_desc->release_datetime);
805 plugin->orig_desc->release_datetime = NULL;
809 GST_LOG ("Plugin %p for file \"%s\" prepared, calling entry function...",
812 /* this is where we load the actual .so, so let's trap SIGSEGV */
813 _gst_plugin_fault_handler_setup ();
814 _gst_plugin_fault_handler_filename = plugin->filename;
816 GST_LOG ("Plugin %p for file \"%s\" prepared, registering...",
819 if (!gst_plugin_register_func (plugin, plugin->orig_desc, NULL)) {
820 /* remove signal handler */
821 _gst_plugin_fault_handler_restore ();
822 GST_DEBUG ("gst_plugin_register_func failed for plugin \"%s\"", filename);
826 GST_PLUGIN_ERROR_MODULE,
827 "File \"%s\" appears to be a GStreamer plugin, but it failed to initialize",
832 /* remove signal handler */
833 _gst_plugin_fault_handler_restore ();
834 _gst_plugin_fault_handler_filename = NULL;
835 GST_INFO ("plugin \"%s\" loaded", plugin->filename);
838 gst_object_ref (plugin);
839 gst_registry_add_plugin (gst_registry_get (), plugin);
842 g_mutex_unlock (&gst_plugin_loading_mutex);
848 gst_object_unref (plugin);
849 g_mutex_unlock (&gst_plugin_loading_mutex);
855 gst_plugin_desc_copy (GstPluginDesc * dest, const GstPluginDesc * src)
857 dest->major_version = src->major_version;
858 dest->minor_version = src->minor_version;
859 dest->name = g_intern_string (src->name);
860 dest->description = g_intern_string (src->description);
861 dest->plugin_init = src->plugin_init;
862 dest->version = g_intern_string (src->version);
863 dest->license = g_intern_string (src->license);
864 dest->source = g_intern_string (src->source);
865 dest->package = g_intern_string (src->package);
866 dest->origin = g_intern_string (src->origin);
867 dest->release_datetime = g_intern_string (src->release_datetime);
871 * gst_plugin_get_name:
872 * @plugin: plugin to get the name of
874 * Get the short name of the plugin
876 * Returns: the name of the plugin
879 gst_plugin_get_name (GstPlugin * plugin)
881 g_return_val_if_fail (plugin != NULL, NULL);
883 return plugin->desc.name;
887 * gst_plugin_get_description:
888 * @plugin: plugin to get long name of
890 * Get the long descriptive name of the plugin
892 * Returns: the long name of the plugin
895 gst_plugin_get_description (GstPlugin * plugin)
897 g_return_val_if_fail (plugin != NULL, NULL);
899 return plugin->desc.description;
903 * gst_plugin_get_filename:
904 * @plugin: plugin to get the filename of
906 * get the filename of the plugin
908 * Returns: the filename of the plugin
911 gst_plugin_get_filename (GstPlugin * plugin)
913 g_return_val_if_fail (plugin != NULL, NULL);
915 return plugin->filename;
919 * gst_plugin_get_version:
920 * @plugin: plugin to get the version of
922 * get the version of the plugin
924 * Returns: the version of the plugin
927 gst_plugin_get_version (GstPlugin * plugin)
929 g_return_val_if_fail (plugin != NULL, NULL);
931 return plugin->desc.version;
935 * gst_plugin_get_license:
936 * @plugin: plugin to get the license of
938 * get the license of the plugin
940 * Returns: the license of the plugin
943 gst_plugin_get_license (GstPlugin * plugin)
945 g_return_val_if_fail (plugin != NULL, NULL);
947 return plugin->desc.license;
951 * gst_plugin_get_source:
952 * @plugin: plugin to get the source of
954 * get the source module the plugin belongs to.
956 * Returns: the source of the plugin
959 gst_plugin_get_source (GstPlugin * plugin)
961 g_return_val_if_fail (plugin != NULL, NULL);
963 return plugin->desc.source;
967 * gst_plugin_get_package:
968 * @plugin: plugin to get the package of
970 * get the package the plugin belongs to.
972 * Returns: the package of the plugin
975 gst_plugin_get_package (GstPlugin * plugin)
977 g_return_val_if_fail (plugin != NULL, NULL);
979 return plugin->desc.package;
983 * gst_plugin_get_origin:
984 * @plugin: plugin to get the origin of
986 * get the URL where the plugin comes from
988 * Returns: the origin of the plugin
991 gst_plugin_get_origin (GstPlugin * plugin)
993 g_return_val_if_fail (plugin != NULL, NULL);
995 return plugin->desc.origin;
999 * gst_plugin_get_release_date_string:
1000 * @plugin: plugin to get the release date of
1002 * Get the release date (and possibly time) in form of a string, if available.
1004 * For normal GStreamer plugin releases this will usually just be a date in
1005 * the form of "YYYY-MM-DD", while pre-releases and builds from git may contain
1006 * a time component after the date as well, in which case the string will be
1007 * formatted like "YYYY-MM-DDTHH:MMZ" (e.g. "2012-04-30T09:30Z").
1009 * There may be plugins that do not have a valid release date set on them.
1011 * Returns: (nullable): the date string of the plugin, or %NULL if not
1015 gst_plugin_get_release_date_string (GstPlugin * plugin)
1017 g_return_val_if_fail (plugin != NULL, NULL);
1019 return plugin->desc.release_datetime;
1023 * gst_plugin_is_loaded:
1024 * @plugin: plugin to query
1026 * queries if the plugin is loaded into memory
1028 * Returns: %TRUE is loaded, %FALSE otherwise
1031 gst_plugin_is_loaded (GstPlugin * plugin)
1033 g_return_val_if_fail (plugin != NULL, FALSE);
1035 return (plugin->module != NULL || plugin->filename == NULL);
1039 * gst_plugin_get_cache_data:
1042 * Gets the plugin specific data cache. If it is %NULL there is no cached data
1043 * stored. This is the case when the registry is getting rebuilt.
1045 * Returns: (transfer none) (nullable): The cached data as a
1046 * #GstStructure or %NULL.
1048 const GstStructure *
1049 gst_plugin_get_cache_data (GstPlugin * plugin)
1051 g_return_val_if_fail (GST_IS_PLUGIN (plugin), NULL);
1053 return plugin->priv->cache_data;
1057 * gst_plugin_set_cache_data:
1059 * @cache_data: (transfer full): a structure containing the data to cache
1061 * Adds plugin specific data to cache. Passes the ownership of the structure to
1064 * The cache is flushed every time the registry is rebuilt.
1067 gst_plugin_set_cache_data (GstPlugin * plugin, GstStructure * cache_data)
1069 g_return_if_fail (GST_IS_PLUGIN (plugin));
1070 g_return_if_fail (GST_IS_STRUCTURE (cache_data));
1072 if (plugin->priv->cache_data) {
1073 gst_structure_free (plugin->priv->cache_data);
1075 plugin->priv->cache_data = cache_data;
1080 * gst_plugin_feature_list:
1081 * @plugin: plugin to query
1082 * @filter: the filter to use
1083 * @first: only return first match
1084 * @user_data: user data passed to the filter function
1086 * Runs a filter against all plugin features and returns a GList with
1087 * the results. If the first flag is set, only the first match is
1088 * returned (as a list with a single object).
1090 * Returns: a GList of features, g_list_free after use.
1093 gst_plugin_feature_filter (GstPlugin * plugin,
1094 GstPluginFeatureFilter filter, gboolean first, gpointer user_data)
1099 list = gst_filter_run (plugin->features, (GstFilterFunc) filter, first,
1101 for (g = list; g; g = g->next) {
1102 gst_object_ref (plugin);
1110 GstPluginFeatureFilter filter;
1118 _feature_filter (GstPlugin * plugin, gpointer user_data)
1121 FeatureFilterData *data = (FeatureFilterData *) user_data;
1123 result = gst_plugin_feature_filter (plugin, data->filter, data->first,
1126 data->result = g_list_concat (data->result, result);
1133 * gst_plugin_list_feature_filter:
1134 * @list: a #GList of plugins to query
1135 * @filter: the filter function to use
1136 * @first: only return first match
1137 * @user_data: user data passed to the filter function
1139 * Runs a filter against all plugin features of the plugins in the given
1140 * list and returns a GList with the results.
1141 * If the first flag is set, only the first match is
1142 * returned (as a list with a single object).
1144 * Returns: a GList of features, g_list_free after use.
1147 gst_plugin_list_feature_filter (GList * list,
1148 GstPluginFeatureFilter filter, gboolean first, gpointer user_data)
1150 FeatureFilterData data;
1153 data.filter = filter;
1155 data.user_data = user_data;
1158 result = gst_filter_run (list, (GstFilterFunc) _feature_filter, first, &data);
1159 g_list_free (result);
1165 * gst_plugin_find_feature:
1166 * @plugin: plugin to get the feature from
1167 * @name: The name of the feature to find
1168 * @type: The type of the feature to find
1170 * Find a feature of the given name and type in the given plugin.
1172 * Returns: a GstPluginFeature or %NULL if the feature was not found.
1175 gst_plugin_find_feature (GstPlugin * plugin, const gchar * name, GType type)
1178 GstPluginFeature *result = NULL;
1179 GstTypeNameData data;
1181 g_return_val_if_fail (name != NULL, NULL);
1186 walk = gst_filter_run (plugin->features,
1187 (GstFilterFunc) gst_plugin_feature_type_name_filter, TRUE, &data);
1190 result = GST_PLUGIN_FEATURE (walk->data);
1192 gst_object_ref (result);
1193 gst_plugin_feature_list_free (walk);
1202 gst_plugin_feature_name_filter (GstPluginFeature * feature, const gchar * name)
1204 return !strcmp (name, GST_PLUGIN_FEATURE_NAME (feature));
1210 * gst_plugin_find_feature_by_name:
1211 * @plugin: plugin to get the feature from
1212 * @name: The name of the feature to find
1214 * Find a feature of the given name in the given plugin.
1216 * Returns: a GstPluginFeature or %NULL if the feature was not found.
1219 gst_plugin_find_feature_by_name (GstPlugin * plugin, const gchar * name)
1222 GstPluginFeature *result = NULL;
1224 g_return_val_if_fail (name != NULL, NULL);
1226 walk = gst_filter_run (plugin->features,
1227 (GstFilterFunc) gst_plugin_feature_name_filter, TRUE, (void *) name);
1230 result = GST_PLUGIN_FEATURE (walk->data);
1232 gst_object_ref (result);
1233 gst_plugin_feature_list_free (walk);
1241 * gst_plugin_load_by_name:
1242 * @name: name of plugin to load
1244 * Load the named plugin. Refs the plugin.
1246 * Returns: (transfer full): a reference to a loaded plugin, or %NULL on error.
1249 gst_plugin_load_by_name (const gchar * name)
1251 GstPlugin *plugin, *newplugin;
1252 GError *error = NULL;
1254 GST_DEBUG ("looking up plugin %s in default registry", name);
1255 plugin = gst_registry_find_plugin (gst_registry_get (), name);
1257 GST_DEBUG ("loading plugin %s from file %s", name, plugin->filename);
1258 newplugin = gst_plugin_load_file (plugin->filename, &error);
1259 gst_object_unref (plugin);
1262 GST_WARNING ("load_plugin error: %s", error->message);
1263 g_error_free (error);
1266 /* newplugin was reffed by load_file */
1270 GST_DEBUG ("Could not find plugin %s in registry", name);
1276 * @plugin: (transfer none): plugin to load
1278 * Loads @plugin. Note that the *return value* is the loaded plugin; @plugin is
1279 * untouched. The normal use pattern of this function goes like this:
1282 * GstPlugin *loaded_plugin;
1283 * loaded_plugin = gst_plugin_load (plugin);
1284 * // presumably, we're no longer interested in the potentially-unloaded plugin
1285 * gst_object_unref (plugin);
1286 * plugin = loaded_plugin;
1289 * Returns: (transfer full): a reference to a loaded plugin, or %NULL on error.
1292 gst_plugin_load (GstPlugin * plugin)
1294 GError *error = NULL;
1295 GstPlugin *newplugin;
1297 if (gst_plugin_is_loaded (plugin)) {
1301 if (!(newplugin = gst_plugin_load_file (plugin->filename, &error)))
1308 GST_WARNING ("load_plugin error: %s", error->message);
1309 g_error_free (error);
1315 * gst_plugin_list_free:
1316 * @list: (transfer full) (element-type Gst.Plugin): list of #GstPlugin
1318 * Unrefs each member of @list, then frees the list.
1321 gst_plugin_list_free (GList * list)
1325 for (g = list; g; g = g->next) {
1326 gst_object_unref (GST_PLUGIN_CAST (g->data));
1331 /* ===== plugin dependencies ===== */
1334 * ENV + xyz where ENV can contain multiple values separated by SEPARATOR
1335 * xyz may be "" (if ENV contains path to file rather than dir)
1336 * ENV + *xyz same as above, but xyz acts as suffix filter
1337 * ENV + xyz* same as above, but xyz acts as prefix filter (is this needed?)
1338 * ENV + *xyz* same as above, but xyz acts as strstr filter (is this needed?)
1340 * same as above, with additional paths hard-coded at compile-time:
1341 * - only check paths + ... if ENV is not set or yields not paths
1342 * - always check paths + ... in addition to ENV
1344 * When user specifies set of environment variables, he/she may also use e.g.
1345 * "HOME/.mystuff/plugins", and we'll expand the content of $HOME with the
1349 /* we store in registry:
1352 * - environment variables (array of strings)
1353 * - last hash of env variable contents (uint) (so we can avoid doing stats
1354 * if one of the env vars has changed; premature optimisation galore)
1355 * - hard-coded paths (array of strings)
1356 * - xyz filename/suffix/prefix strings (array of strings)
1358 * - last hash of file/dir stats (int)
1360 * (= struct GstPluginDep)
1364 gst_plugin_ext_dep_get_env_vars_hash (GstPlugin * plugin, GstPluginDep * dep)
1369 /* there's no deeper logic to what we do here; all we want to know (when
1370 * checking if the plugin needs to be rescanned) is whether the content of
1371 * one of the environment variables in the list is different from when it
1372 * was last scanned */
1374 for (e = dep->env_vars; e != NULL && *e != NULL; ++e) {
1378 /* order matters: "val",NULL needs to yield a different hash than
1379 * NULL,"val", so do a shift here whether the var is set or not */
1382 /* want environment variable at beginning of string */
1383 if (!g_ascii_isalnum (**e)) {
1384 GST_WARNING_OBJECT (plugin, "string prefix is not a valid environment "
1385 "variable string: %s", *e);
1389 /* user is allowed to specify e.g. "HOME/.pitivi/plugins" */
1390 g_strlcpy (env_var, *e, sizeof (env_var));
1391 g_strdelimit (env_var, "/\\", '\0');
1393 if ((val = g_getenv (env_var)))
1394 hash += g_str_hash (val);
1401 _priv_plugin_deps_env_vars_changed (GstPlugin * plugin)
1405 for (l = plugin->priv->deps; l != NULL; l = l->next) {
1406 GstPluginDep *dep = l->data;
1408 if (dep->env_hash != gst_plugin_ext_dep_get_env_vars_hash (plugin, dep))
1416 gst_plugin_ext_dep_extract_env_vars_paths (GstPlugin * plugin,
1417 GstPluginDep * dep, GQueue * paths)
1421 for (evars = dep->env_vars; evars != NULL && *evars != NULL; ++evars) {
1425 /* want environment variable at beginning of string */
1426 if (!g_ascii_isalnum (**evars)) {
1427 GST_WARNING_OBJECT (plugin, "string prefix is not a valid environment "
1428 "variable string: %s", *evars);
1432 /* user is allowed to specify e.g. "HOME/.pitivi/plugins", which we want to
1433 * split into the env_var name component and the path component */
1434 components = g_strsplit_set (*evars, "/\\", 2);
1435 g_assert (components != NULL);
1437 e = g_getenv (components[0]);
1438 GST_LOG_OBJECT (plugin, "expanding %s = '%s' (path suffix: %s)",
1439 components[0], GST_STR_NULL (e), GST_STR_NULL (components[1]));
1441 if (components[1] != NULL) {
1442 g_strdelimit (components[1], "/\\", G_DIR_SEPARATOR);
1445 if (e != NULL && *e != '\0') {
1449 arr = g_strsplit (e, G_SEARCHPATH_SEPARATOR_S, -1);
1451 for (i = 0; arr != NULL && arr[i] != NULL; ++i) {
1454 if (!g_path_is_absolute (arr[i])) {
1455 GST_INFO_OBJECT (plugin, "ignoring environment variable content '%s'"
1456 ": either not an absolute path or not a path at all", arr[i]);
1460 if (components[1] != NULL) {
1461 full_path = g_build_filename (arr[i], components[1], NULL);
1463 full_path = g_strdup (arr[i]);
1466 if (!g_queue_find_custom (paths, full_path, (GCompareFunc) strcmp)) {
1467 GST_LOG_OBJECT (plugin, "path: '%s'", full_path);
1468 g_queue_push_tail (paths, full_path);
1471 GST_LOG_OBJECT (plugin, "path: '%s' (duplicate,ignoring)", full_path);
1479 g_strfreev (components);
1482 GST_LOG_OBJECT (plugin, "Extracted %d paths from environment", paths->length);
1486 gst_plugin_ext_dep_get_hash_from_stat_entry (GStatBuf * s)
1488 if (!(s->st_mode & (S_IFDIR | S_IFREG)))
1491 /* completely random formula */
1492 return ((s->st_size << 3) + (s->st_mtime << 5)) ^ s->st_ctime;
1496 gst_plugin_ext_dep_direntry_matches (GstPlugin * plugin, const gchar * entry,
1497 const gchar ** filenames, GstPluginDependencyFlags flags)
1499 /* no filenames specified, match all entries for now (could probably
1500 * optimise by just taking the dir stat hash or so) */
1501 if (filenames == NULL || *filenames == NULL || **filenames == '\0')
1504 while (*filenames != NULL) {
1506 if (((flags & GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_SUFFIX)) &&
1507 g_str_has_suffix (entry, *filenames)) {
1509 /* else it's an exact match that's needed */
1510 } else if (strcmp (entry, *filenames) == 0) {
1513 GST_LOG ("%s does not match %s, flags=0x%04x", entry, *filenames, flags);
1520 gst_plugin_ext_dep_scan_dir_and_match_names (GstPlugin * plugin,
1521 const gchar * path, const gchar ** filenames,
1522 GstPluginDependencyFlags flags, int depth)
1525 gboolean recurse_dirs;
1530 recurse_dirs = ! !(flags & GST_PLUGIN_DEPENDENCY_FLAG_RECURSE);
1532 dir = g_dir_open (path, 0, &err);
1534 GST_DEBUG_OBJECT (plugin, "g_dir_open(%s) failed: %s", path, err->message);
1539 /* FIXME: we're assuming here that we always get the directory entries in
1540 * the same order, and not in a random order */
1541 while ((entry = g_dir_read_name (dir))) {
1542 gboolean have_match;
1548 gst_plugin_ext_dep_direntry_matches (plugin, entry, filenames, flags);
1550 /* avoid the stat if possible */
1551 if (!have_match && !recurse_dirs)
1554 full_path = g_build_filename (path, entry, NULL);
1555 if (g_stat (full_path, &s) < 0) {
1556 fhash = (guint) - 1;
1557 GST_LOG_OBJECT (plugin, "stat: %s (error: %s)", full_path,
1558 g_strerror (errno));
1559 } else if (have_match) {
1560 fhash = gst_plugin_ext_dep_get_hash_from_stat_entry (&s);
1561 GST_LOG_OBJECT (plugin, "stat: %s (result: %u)", full_path, fhash);
1562 } else if ((s.st_mode & (S_IFDIR))) {
1563 fhash = gst_plugin_ext_dep_scan_dir_and_match_names (plugin, full_path,
1564 filenames, flags, depth + 1);
1566 /* it's not a name match, we want to recurse, but it's not a directory */
1571 hash = (hash + fhash) << 1;
1580 gst_plugin_ext_dep_scan_path_with_filenames (GstPlugin * plugin,
1581 const gchar * path, const gchar ** filenames,
1582 GstPluginDependencyFlags flags)
1584 const gchar *empty_filenames[] = { "", NULL };
1585 gboolean recurse_into_dirs, partial_names;
1588 /* to avoid special-casing below (FIXME?) */
1589 if (filenames == NULL || *filenames == NULL)
1590 filenames = empty_filenames;
1592 recurse_into_dirs = ! !(flags & GST_PLUGIN_DEPENDENCY_FLAG_RECURSE);
1593 partial_names = ! !(flags & GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_SUFFIX);
1595 /* if we can construct the exact paths to check with the data we have, just
1596 * stat them one by one; this is more efficient than opening the directory
1597 * and going through each entry to see if it matches one of our filenames. */
1598 if (!recurse_into_dirs && !partial_names) {
1599 for (i = 0; filenames[i] != NULL; ++i) {
1604 full_path = g_build_filename (path, filenames[i], NULL);
1605 if (g_stat (full_path, &s) < 0) {
1606 fhash = (guint) - 1;
1607 GST_LOG_OBJECT (plugin, "stat: %s (error: %s)", full_path,
1608 g_strerror (errno));
1610 fhash = gst_plugin_ext_dep_get_hash_from_stat_entry (&s);
1611 GST_LOG_OBJECT (plugin, "stat: %s (result: %08x)", full_path, fhash);
1613 hash = (hash + fhash) << 1;
1617 hash = gst_plugin_ext_dep_scan_dir_and_match_names (plugin, path,
1618 filenames, flags, 0);
1625 gst_plugin_ext_dep_get_stat_hash (GstPlugin * plugin, GstPluginDep * dep)
1627 gboolean paths_are_default_only;
1628 GQueue scan_paths = G_QUEUE_INIT;
1629 guint scan_hash = 0;
1632 GST_LOG_OBJECT (plugin, "start");
1634 paths_are_default_only =
1635 dep->flags & GST_PLUGIN_DEPENDENCY_FLAG_PATHS_ARE_DEFAULT_ONLY;
1637 gst_plugin_ext_dep_extract_env_vars_paths (plugin, dep, &scan_paths);
1639 if (g_queue_is_empty (&scan_paths) || !paths_are_default_only) {
1642 for (paths = dep->paths; paths != NULL && *paths != NULL; ++paths) {
1643 const gchar *path = *paths;
1645 if (!g_queue_find_custom (&scan_paths, path, (GCompareFunc) strcmp)) {
1646 GST_LOG_OBJECT (plugin, "path: '%s'", path);
1647 g_queue_push_tail (&scan_paths, g_strdup (path));
1649 GST_LOG_OBJECT (plugin, "path: '%s' (duplicate, ignoring)", path);
1654 while ((path = g_queue_pop_head (&scan_paths))) {
1655 scan_hash += gst_plugin_ext_dep_scan_path_with_filenames (plugin, path,
1656 (const gchar **) dep->names, dep->flags);
1657 scan_hash = scan_hash << 1;
1661 GST_LOG_OBJECT (plugin, "done, scan_hash: %08x", scan_hash);
1666 _priv_plugin_deps_files_changed (GstPlugin * plugin)
1670 for (l = plugin->priv->deps; l != NULL; l = l->next) {
1671 GstPluginDep *dep = l->data;
1673 if (dep->stat_hash != gst_plugin_ext_dep_get_stat_hash (plugin, dep))
1681 gst_plugin_ext_dep_free (GstPluginDep * dep)
1683 g_strfreev (dep->env_vars);
1684 g_strfreev (dep->paths);
1685 g_strfreev (dep->names);
1686 g_slice_free (GstPluginDep, dep);
1690 gst_plugin_ext_dep_strv_equal (gchar ** arr1, gchar ** arr2)
1694 if (arr1 == NULL || arr2 == NULL)
1696 for (; *arr1 != NULL && *arr2 != NULL; ++arr1, ++arr2) {
1697 if (strcmp (*arr1, *arr2) != 0)
1700 return (*arr1 == *arr2);
1704 gst_plugin_ext_dep_equals (GstPluginDep * dep, const gchar ** env_vars,
1705 const gchar ** paths, const gchar ** names, GstPluginDependencyFlags flags)
1707 if (dep->flags != flags)
1710 return gst_plugin_ext_dep_strv_equal (dep->env_vars, (gchar **) env_vars) &&
1711 gst_plugin_ext_dep_strv_equal (dep->paths, (gchar **) paths) &&
1712 gst_plugin_ext_dep_strv_equal (dep->names, (gchar **) names);
1716 * gst_plugin_add_dependency:
1717 * @plugin: a #GstPlugin
1718 * @env_vars: (allow-none): %NULL-terminated array of environment variables affecting the
1719 * feature set of the plugin (e.g. an environment variable containing
1720 * paths where to look for additional modules/plugins of a library),
1721 * or %NULL. Environment variable names may be followed by a path component
1722 * which will be added to the content of the environment variable, e.g.
1723 * "HOME/.mystuff/plugins".
1724 * @paths: (allow-none): %NULL-terminated array of directories/paths where dependent files
1726 * @names: (allow-none): %NULL-terminated array of file names (or file name suffixes,
1727 * depending on @flags) to be used in combination with the paths from
1728 * @paths and/or the paths extracted from the environment variables in
1729 * @env_vars, or %NULL.
1730 * @flags: optional flags, or #GST_PLUGIN_DEPENDENCY_FLAG_NONE
1732 * Make GStreamer aware of external dependencies which affect the feature
1733 * set of this plugin (ie. the elements or typefinders associated with it).
1735 * GStreamer will re-inspect plugins with external dependencies whenever any
1736 * of the external dependencies change. This is useful for plugins which wrap
1737 * other plugin systems, e.g. a plugin which wraps a plugin-based visualisation
1738 * library and makes visualisations available as GStreamer elements, or a
1739 * codec loader which exposes elements and/or caps dependent on what external
1740 * codec libraries are currently installed.
1743 gst_plugin_add_dependency (GstPlugin * plugin, const gchar ** env_vars,
1744 const gchar ** paths, const gchar ** names, GstPluginDependencyFlags flags)
1749 g_return_if_fail (GST_IS_PLUGIN (plugin));
1751 if ((env_vars == NULL || env_vars[0] == NULL) &&
1752 (paths == NULL || paths[0] == NULL)) {
1753 GST_DEBUG_OBJECT (plugin,
1754 "plugin registered empty dependency set. Ignoring");
1758 for (l = plugin->priv->deps; l != NULL; l = l->next) {
1759 if (gst_plugin_ext_dep_equals (l->data, env_vars, paths, names, flags)) {
1760 GST_LOG_OBJECT (plugin, "dependency already registered");
1765 dep = g_slice_new (GstPluginDep);
1767 dep->env_vars = g_strdupv ((gchar **) env_vars);
1768 dep->paths = g_strdupv ((gchar **) paths);
1769 dep->names = g_strdupv ((gchar **) names);
1772 dep->env_hash = gst_plugin_ext_dep_get_env_vars_hash (plugin, dep);
1773 dep->stat_hash = gst_plugin_ext_dep_get_stat_hash (plugin, dep);
1775 plugin->priv->deps = g_list_append (plugin->priv->deps, dep);
1777 GST_DEBUG_OBJECT (plugin, "added dependency:");
1778 for (; env_vars != NULL && *env_vars != NULL; ++env_vars)
1779 GST_DEBUG_OBJECT (plugin, " evar: %s", *env_vars);
1780 for (; paths != NULL && *paths != NULL; ++paths)
1781 GST_DEBUG_OBJECT (plugin, " path: %s", *paths);
1782 for (; names != NULL && *names != NULL; ++names)
1783 GST_DEBUG_OBJECT (plugin, " name: %s", *names);
1787 * gst_plugin_add_dependency_simple:
1788 * @plugin: the #GstPlugin
1789 * @env_vars: (allow-none): one or more environment variables (separated by ':', ';' or ','),
1790 * or %NULL. Environment variable names may be followed by a path component
1791 * which will be added to the content of the environment variable, e.g.
1792 * "HOME/.mystuff/plugins:MYSTUFF_PLUGINS_PATH"
1793 * @paths: (allow-none): one ore more directory paths (separated by ':' or ';' or ','),
1794 * or %NULL. Example: "/usr/lib/mystuff/plugins"
1795 * @names: (allow-none): one or more file names or file name suffixes (separated by commas),
1797 * @flags: optional flags, or #GST_PLUGIN_DEPENDENCY_FLAG_NONE
1799 * Make GStreamer aware of external dependencies which affect the feature
1800 * set of this plugin (ie. the elements or typefinders associated with it).
1802 * GStreamer will re-inspect plugins with external dependencies whenever any
1803 * of the external dependencies change. This is useful for plugins which wrap
1804 * other plugin systems, e.g. a plugin which wraps a plugin-based visualisation
1805 * library and makes visualisations available as GStreamer elements, or a
1806 * codec loader which exposes elements and/or caps dependent on what external
1807 * codec libraries are currently installed.
1809 * Convenience wrapper function for gst_plugin_add_dependency() which
1810 * takes simple strings as arguments instead of string arrays, with multiple
1811 * arguments separated by predefined delimiters (see above).
1814 gst_plugin_add_dependency_simple (GstPlugin * plugin,
1815 const gchar * env_vars, const gchar * paths, const gchar * names,
1816 GstPluginDependencyFlags flags)
1818 gchar **a_evars = NULL;
1819 gchar **a_paths = NULL;
1820 gchar **a_names = NULL;
1823 a_evars = g_strsplit_set (env_vars, ":;,", -1);
1825 a_paths = g_strsplit_set (paths, ":;,", -1);
1827 a_names = g_strsplit_set (names, ",", -1);
1829 gst_plugin_add_dependency (plugin, (const gchar **) a_evars,
1830 (const gchar **) a_paths, (const gchar **) a_names, flags);
1833 g_strfreev (a_evars);
1835 g_strfreev (a_paths);
1837 g_strfreev (a_names);