1 /* GStreamer
2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
4 * 2005 David A. Schleef <ds@schleef.org>
5 *
6 * gstregistry.c: handle registry
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 */
23
24 /**
25 * SECTION:gstregistry
26 * @short_description: Abstract base class for management of #GstPlugin objects
27 * @see_also: #GstPlugin, #GstPluginFeature
28 *
29 * One registry holds the metadata of a set of plugins.
30 *
31 * <emphasis role="bold">Design:</emphasis>
32 *
33 * The #GstRegistry object is a list of plugins and some functions for dealing
34 * with them. Each #GstPlugin is matched 1-1 with a file on disk, and may or may
35 * not be loaded at a given time.
36 *
37 * The primary source, at all times, of plugin information is each plugin file
38 * itself. Thus, if an application wants information about a particular plugin,
39 * or wants to search for a feature that satisfies given criteria, the primary
40 * means of doing so is to load every plugin and look at the resulting
41 * information that is gathered in the default registry. Clearly, this is a time
42 * consuming process, so we cache information in the registry file. The format
43 * and location of the cache file is internal to gstreamer.
44 *
45 * On startup, plugins are searched for in the plugin search path. The following
46 * locations are checked in this order:
47 * <itemizedlist>
48 * <listitem>
49 * <para>location from --gst-plugin-path commandline option.</para>
50 * </listitem>
51 * <listitem>
52 * <para>the GST_PLUGIN_PATH environment variable.</para>
53 * </listitem>
54 * <listitem>
55 * <para>the GST_PLUGIN_SYSTEM_PATH environment variable.</para>
56 * </listitem>
57 * <listitem>
58 * <para>default locations (if GST_PLUGIN_SYSTEM_PATH is not set). Those
59 * default locations are:
60 * <filename>$XDG_DATA_HOME/gstreamer-$GST_API_VERSION/plugins/</filename>
61 * and <filename>$prefix/libs/gstreamer-$GST_API_VERSION/</filename>.
62 * <ulink url="http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html">
63 * <filename>$XDG_DATA_HOME</filename></ulink> defaults to
64 * <filename>$HOME/.local/share</filename>.
65 * </para>
66 * </listitem>
67 * </itemizedlist>
68 * The registry cache file is loaded from
69 * <filename>$XDG_CACHE_HOME/gstreamer-$GST_API_VERSION/registry-$ARCH.bin</filename>
70 * (where
71 * <ulink url="http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html">
72 * <filename>$XDG_CACHE_HOME</filename></ulink> defaults to
73 * <filename>$HOME/.cache</filename>) or the file listed in the GST_REGISTRY
74 * env var. One reason to change the registry location is for testing.
75 *
76 * For each plugin that is found in the plugin search path, there could be 3
77 * possibilities for cached information:
78 * <itemizedlist>
79 * <listitem>
80 * <para>the cache may not contain information about a given file.</para>
81 * </listitem>
82 * <listitem>
83 * <para>the cache may have stale information.</para>
84 * </listitem>
85 * <listitem>
86 * <para>the cache may have current information.</para>
87 * </listitem>
88 * </itemizedlist>
89 *
90 * In the first two cases, the plugin is loaded and the cache updated. In
91 * addition to these cases, the cache may have entries for plugins that are not
92 * relevant to the current process. These are marked as not available to the
93 * current process. If the cache is updated for whatever reason, it is marked
94 * dirty.
95 *
96 * A dirty cache is written out at the end of initialization. Each entry is
97 * checked to make sure the information is minimally valid. If not, the entry is
98 * simply dropped.
99 *
100 * <emphasis role="bold">Implementation notes:</emphasis>
101 *
102 * The "cache" and "registry" are different concepts and can represent
103 * different sets of plugins. For various reasons, at init time, the cache is
104 * stored in the default registry, and plugins not relevant to the current
105 * process are marked with the %GST_PLUGIN_FLAG_CACHED bit. These plugins are
106 * removed at the end of initialization.
107 */
108
109 #ifdef HAVE_CONFIG_H
110 #include "config.h"
111 #endif
112 #include "gstconfig.h"
113 #include "gst_private.h"
114 #include <glib.h>
115 #include <sys/types.h>
116 #include <sys/stat.h>
117 #ifdef HAVE_UNISTD_H
118 #include <unistd.h>
119 #endif
120 #include <errno.h>
121 #include <stdio.h>
122 #include <string.h>
123
124 /* For g_stat () */
125 #include <glib/gstdio.h>
126
127 #include "gstinfo.h"
128 #include "gsterror.h"
129 #include "gstregistry.h"
130 #ifndef GSTREAMER_LITE
131 #include "gstdeviceproviderfactory.h"
132 #endif // GSTREAMER_LITE
133
134 #include "gstpluginloader.h"
135
136 #include "gst-i18n-lib.h"
137
138 #include "gst.h"
139 #include "glib-compat-private.h"
140
141 #ifdef GSTREAMER_LITE
142 #define LIBGSTREAMER_LIB_NAME "gstreamer-lite"
143 #endif // GSTREAMER_LITE
144
145
146 #ifdef G_OS_WIN32
147 #include <windows.h>
148 extern HMODULE _priv_gst_dll_handle;
149 #endif
150
151 #if defined(GSTREAMER_LITE) && defined(HAVE_OSX)
152 #include <mach-o/dyld.h>
153 #include <mach-o/ldsyms.h> //defines _mh_dylib_header see man page for ld
154 #endif // GSTREAMER_LITE
155
156 #if defined (GSTREAMER_LITE) && defined(LINUX)
157 #include <link.h>
158 #include <dlfcn.h>
159
160 // For libav (libavcodec.so)
161 static const int AVCODEC_LIBAV_EXPLICIT_VERSIONS[] = { 53, 54, 55, 56 };
162 // For ffmpeg (libavcodec-ffmpeg.so)
163 static const int AVCODEC_FFMPEG_EXPLICIT_VERSIONS[] = { 56 };
164 // For libav or ffmpeg (libavcodec.so)
165 static const int AVCODEC_EXPLICIT_VERSIONS[] = { 57 };
166
167 /*
168 * Callback passed to dl_iterate_phdr(): finds the path of
169 * LIBGSTREAMER_LIB_NAME and returns it in data which is actually
170 * a char**.
171 */
172 static int dl_callback (struct dl_phdr_info *info, size_t size, void *data)
173 {
174 int result = 0;
175
176 if (NULL != info)
177 {
178 if (NULL != strstr (info->dlpi_name, LIBGSTREAMER_LIB_NAME))
179 {
180 if (NULL != data)
181 {
182 char** name = (char**)data;
183 *name = (char*)info->dlpi_name;
184 }
185
186 result = 1;
187 }
188 }
189
190 return result;
191 }
192 #endif // GSTREAMER_LITE && LINUX
193
194 #define GST_CAT_DEFAULT GST_CAT_REGISTRY
195
196 struct _GstRegistryPrivate
197 {
198 GList *plugins;
199 GList *features;
200
201 #if 0
202 GList *paths;
203 #endif
204
205 int cache_file;
206
207 /* hash to speedup _lookup_feature_locked() */
208 GHashTable *feature_hash;
209 /* hash to speedup _lookup */
210 GHashTable *basename_hash;
211
212 /* updated whenever the feature list changes */
213 guint32 cookie;
214 /* speedup for searching features */
215 GList *element_factory_list;
216 guint32 efl_cookie;
217 GList *typefind_factory_list;
218 guint32 tfl_cookie;
219 GList *device_provider_factory_list;
220 guint32 dmfl_cookie;
221 };
222
223 /* the one instance of the default registry and the mutex protecting the
224 * variable. */
225 static GMutex _gst_registry_mutex;
226 static GstRegistry *_gst_registry_default = NULL;
227
228 /* defaults */
229 #ifndef GSTREAMER_LITE
230 #define DEFAULT_FORK TRUE
231 #else // GSTREAMER_LITE
232 // For GSTREAMER_LITE do not use fork for registry since it may break things, because
233 // we do not use file to store registry and registry is kept in memory.
234 #define DEFAULT_FORK FALSE
235 #define LIBGSTREAMER_LIB_NAME "gstreamer-lite"
236 #endif // GSTREAMER_LITE
237
238 /* control the behaviour of registry rebuild */
239 static gboolean _gst_enable_registry_fork = DEFAULT_FORK;
240 /* List of plugins that need preloading/reloading after scanning registry */
241 extern GSList *_priv_gst_preload_plugins;
242
243 #ifndef GST_DISABLE_REGISTRY
244 /*set to TRUE when registry needn't to be updated */
245 gboolean _priv_gst_disable_registry_update = FALSE;
246 extern GList *_priv_gst_plugin_paths;
247
248 /* Set to TRUE when the registry cache should be disabled */
249 gboolean _gst_disable_registry_cache = FALSE;
250
251 static gboolean __registry_reuse_plugin_scanner = TRUE;
252 #endif
253
254 /* Element signals and args */
255 enum
256 {
257 PLUGIN_ADDED,
258 FEATURE_ADDED,
259 LAST_SIGNAL
260 };
261
262 #ifdef GSTREAMER_LITE
263 gchar *gstlite_plugins_list[] =
264 {
265 #ifdef LINUX
266
267 "libfxplugins",
268 "libavplugin",
269 #elif defined (G_OS_WIN32)
270 "fxplugins",
271 #elif defined (HAVE_OSX)
272 "libfxplugins",
273 #endif
274 NULL
275 };
276 #endif // GSTREAMER_LITE
277
278 static void gst_registry_finalize (GObject * object);
279
280 static guint gst_registry_signals[LAST_SIGNAL] = { 0 };
281
282 static GstPluginFeature *gst_registry_lookup_feature_locked (GstRegistry *
283 registry, const char *name);
284 static GstPlugin *gst_registry_lookup_bn_locked (GstRegistry * registry,
285 const char *basename);
286
287 #define gst_registry_parent_class parent_class
288 G_DEFINE_TYPE (GstRegistry, gst_registry, GST_TYPE_OBJECT);
289
290 static void
291 gst_registry_class_init (GstRegistryClass * klass)
292 {
293 GObjectClass *gobject_class;
294
295 gobject_class = (GObjectClass *) klass;
296
297 g_type_class_add_private (klass, sizeof (GstRegistryPrivate));
298
299 /**
300 * GstRegistry::plugin-added:
301 * @registry: the registry that emitted the signal
302 * @plugin: the plugin that has been added
303 *
304 * Signals that a plugin has been added to the registry (possibly
305 * replacing a previously-added one by the same name)
306 */
307 gst_registry_signals[PLUGIN_ADDED] =
308 g_signal_new ("plugin-added", G_TYPE_FROM_CLASS (klass),
309 G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
310 G_TYPE_NONE, 1, GST_TYPE_PLUGIN);
311
312 /**
313 * GstRegistry::feature-added:
314 * @registry: the registry that emitted the signal
315 * @feature: the feature that has been added
316 *
317 * Signals that a feature has been added to the registry (possibly
318 * replacing a previously-added one by the same name)
319 */
320 gst_registry_signals[FEATURE_ADDED] =
321 g_signal_new ("feature-added", G_TYPE_FROM_CLASS (klass),
322 G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
323 G_TYPE_NONE, 1, GST_TYPE_PLUGIN_FEATURE);
324
325 gobject_class->finalize = gst_registry_finalize;
326 }
327
328 static void
329 gst_registry_init (GstRegistry * registry)
330 {
331 registry->priv =
332 G_TYPE_INSTANCE_GET_PRIVATE (registry, GST_TYPE_REGISTRY,
333 GstRegistryPrivate);
334 registry->priv->feature_hash = g_hash_table_new (g_str_hash, g_str_equal);
335 registry->priv->basename_hash = g_hash_table_new (g_str_hash, g_str_equal);
336 }
337
338 static void
339 gst_registry_finalize (GObject * object)
340 {
341 GstRegistry *registry = GST_REGISTRY (object);
342 GList *plugins, *p;
343 GList *features, *f;
344
345 plugins = registry->priv->plugins;
346 registry->priv->plugins = NULL;
347
348 GST_DEBUG_OBJECT (registry, "registry finalize");
349 p = plugins;
350 while (p) {
351 GstPlugin *plugin = p->data;
352
353 if (plugin) {
354 GST_LOG_OBJECT (registry, "removing plugin %s",
355 gst_plugin_get_name (plugin));
356 gst_object_unref (plugin);
357 }
358 p = g_list_next (p);
359 }
360 g_list_free (plugins);
361
362 features = registry->priv->features;
363 registry->priv->features = NULL;
364
365 f = features;
366 while (f) {
367 GstPluginFeature *feature = f->data;
368
369 if (feature) {
370 GST_LOG_OBJECT (registry, "removing feature %p (%s)", feature,
371 GST_OBJECT_NAME (feature));
372 gst_object_unparent (GST_OBJECT_CAST (feature));
373 }
374 f = g_list_next (f);
375 }
376 g_list_free (features);
377
378 g_hash_table_destroy (registry->priv->feature_hash);
379 registry->priv->feature_hash = NULL;
380 g_hash_table_destroy (registry->priv->basename_hash);
381 registry->priv->basename_hash = NULL;
382
383 if (registry->priv->element_factory_list) {
384 GST_DEBUG_OBJECT (registry, "Cleaning up cached element factory list");
385 gst_plugin_feature_list_free (registry->priv->element_factory_list);
386 }
387
388 if (registry->priv->typefind_factory_list) {
389 GST_DEBUG_OBJECT (registry, "Cleaning up cached typefind factory list");
390 gst_plugin_feature_list_free (registry->priv->typefind_factory_list);
391 }
392
393 if (registry->priv->device_provider_factory_list) {
394 GST_DEBUG_OBJECT (registry,
395 "Cleaning up cached device provider factory list");
396 gst_plugin_feature_list_free (registry->priv->device_provider_factory_list);
397 }
398
399 G_OBJECT_CLASS (parent_class)->finalize (object);
400 }
401
402 /**
403 * gst_registry_get:
404 *
405 * Retrieves the singleton plugin registry. The caller does not own a
406 * reference on the registry, as it is alive as long as GStreamer is
407 * initialized.
408 *
409 * Returns: (transfer none): the #GstRegistry.
410 */
411 GstRegistry *
412 gst_registry_get (void)
413 {
414 GstRegistry *registry;
415
416 g_mutex_lock (&_gst_registry_mutex);
417 if (G_UNLIKELY (!_gst_registry_default)) {
418 _gst_registry_default = g_object_newv (GST_TYPE_REGISTRY, 0, NULL);
419 gst_object_ref_sink (GST_OBJECT_CAST (_gst_registry_default));
420 }
421 registry = _gst_registry_default;
422 g_mutex_unlock (&_gst_registry_mutex);
423
424 return registry;
425 }
426
427 #if 0
428 /**
429 * gst_registry_add_path:
430 * @registry: the registry to add the path to
431 * @path: the path to add to the registry
432 *
433 * Add the given path to the registry. The syntax of the
434 * path is specific to the registry. If the path has already been
435 * added, do nothing.
436 */
437 void
438 gst_registry_add_path (GstRegistry * registry, const gchar * path)
439 {
440 g_return_if_fail (GST_IS_REGISTRY (registry));
441 g_return_if_fail (path != NULL);
442
443 if (strlen (path) == 0)
444 goto empty_path;
445
446 GST_OBJECT_LOCK (registry);
447 if (g_list_find_custom (registry->priv->paths, path, (GCompareFunc) strcmp))
448 goto was_added;
449
450 GST_INFO ("Adding plugin path: \"%s\"", path);
451 registry->priv->paths =
452 g_list_append (registry->priv->paths, g_strdup (path));
453 GST_OBJECT_UNLOCK (registry);
454
455 return;
456
457 empty_path:
458 {
459 GST_INFO ("Ignoring empty plugin path");
460 return;
461 }
462 was_added:
463 {
464 g_warning ("path %s already added to registry", path);
465 GST_OBJECT_UNLOCK (registry);
466 return;
467 }
468 }
469
470 /**
471 * gst_registry_get_path_list:
472 * @registry: the registry to get the pathlist of
473 *
474 * Get the list of paths for the given registry.
475 *
476 * Returns: (transfer container) (element-type char*): A #GList of paths as
477 * strings. g_list_free after use.
478 *
479 * MT safe.
480 */
481 GList *
482 gst_registry_get_path_list (GstRegistry * registry)
483 {
484 GList *list;
485
486 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
487
488 GST_OBJECT_LOCK (registry);
489 /* We don't need to copy the strings, because they won't be deleted
490 * as long as the GstRegistry is around */
491 list = g_list_copy (registry->priv->paths);
492 GST_OBJECT_UNLOCK (registry);
493
494 return list;
495 }
496 #endif
497
498 /**
499 * gst_registry_add_plugin:
500 * @registry: the registry to add the plugin to
501 * @plugin: (transfer full): the plugin to add
502 *
503 * Add the plugin to the registry. The plugin-added signal will be emitted.
504 * This function will sink @plugin.
505 *
506 * Returns: %TRUE on success.
507 *
508 * MT safe.
509 */
510 gboolean
511 gst_registry_add_plugin (GstRegistry * registry, GstPlugin * plugin)
512 {
513 GstPlugin *existing_plugin;
514
515 g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
516 g_return_val_if_fail (GST_IS_PLUGIN (plugin), FALSE);
517
518 GST_OBJECT_LOCK (registry);
519 if (G_LIKELY (plugin->basename)) {
520 /* we have a basename, see if we find the plugin */
521 existing_plugin =
522 gst_registry_lookup_bn_locked (registry, plugin->basename);
523 if (existing_plugin) {
524 GST_DEBUG_OBJECT (registry,
525 "Replacing existing plugin \"%s\" %p with new plugin %p for filename \"%s\"",
526 GST_STR_NULL (existing_plugin->filename), existing_plugin, plugin,
527 GST_STR_NULL (plugin->filename));
528 /* If the new plugin is blacklisted and the existing one isn't cached, do not
529 * accept if it's from a different location than the existing one */
530 if (GST_OBJECT_FLAG_IS_SET (plugin, GST_PLUGIN_FLAG_BLACKLISTED) &&
531 strcmp (plugin->filename, existing_plugin->filename)) {
532 GST_WARNING_OBJECT (registry,
533 "Not replacing plugin because new one (%s) is blacklisted but for a different location than existing one (%s)",
534 plugin->filename, existing_plugin->filename);
535 gst_object_unref (plugin);
536 GST_OBJECT_UNLOCK (registry);
537 return FALSE;
538 }
539 registry->priv->plugins =
540 g_list_remove (registry->priv->plugins, existing_plugin);
541 if (G_LIKELY (existing_plugin->basename))
542 g_hash_table_remove (registry->priv->basename_hash,
543 existing_plugin->basename);
544 gst_object_unref (existing_plugin);
545 }
546 }
547
548 GST_DEBUG_OBJECT (registry, "adding plugin %p for filename \"%s\"",
549 plugin, GST_STR_NULL (plugin->filename));
550
551 registry->priv->plugins = g_list_prepend (registry->priv->plugins, plugin);
552 if (G_LIKELY (plugin->basename))
553 g_hash_table_replace (registry->priv->basename_hash, plugin->basename,
554 plugin);
555
556 gst_object_ref_sink (plugin);
557 GST_OBJECT_UNLOCK (registry);
558
559 GST_LOG_OBJECT (registry, "emitting plugin-added for filename \"%s\"",
560 GST_STR_NULL (plugin->filename));
561 g_signal_emit (registry, gst_registry_signals[PLUGIN_ADDED], 0, plugin);
562
563 return TRUE;
564 }
565
566 static void
567 gst_registry_remove_features_for_plugin_unlocked (GstRegistry * registry,
568 GstPlugin * plugin)
569 {
570 GList *f;
571
572 g_return_if_fail (GST_IS_REGISTRY (registry));
573 g_return_if_fail (GST_IS_PLUGIN (plugin));
574
575 /* Remove all features for this plugin */
576 f = registry->priv->features;
577 while (f != NULL) {
578 GList *next = g_list_next (f);
579 GstPluginFeature *feature = f->data;
580
581 if (G_UNLIKELY (feature && feature->plugin == plugin)) {
582 GST_DEBUG_OBJECT (registry, "removing feature %p (%s) for plugin %p (%s)",
583 feature, gst_plugin_feature_get_name (feature), plugin,
584 plugin->desc.name);
585
586 registry->priv->features =
587 g_list_delete_link (registry->priv->features, f);
588 g_hash_table_remove (registry->priv->feature_hash,
589 GST_OBJECT_NAME (feature));
590 gst_object_unparent (GST_OBJECT_CAST (feature));
591 }
592 f = next;
593 }
594 registry->priv->cookie++;
595 }
596
597 /**
598 * gst_registry_remove_plugin:
599 * @registry: the registry to remove the plugin from
600 * @plugin: (transfer none): the plugin to remove
601 *
602 * Remove the plugin from the registry.
603 *
604 * MT safe.
605 */
606 void
607 gst_registry_remove_plugin (GstRegistry * registry, GstPlugin * plugin)
608 {
609 g_return_if_fail (GST_IS_REGISTRY (registry));
610 g_return_if_fail (GST_IS_PLUGIN (plugin));
611
612 GST_DEBUG_OBJECT (registry, "removing plugin %p (%s)",
613 plugin, gst_plugin_get_name (plugin));
614
615 GST_OBJECT_LOCK (registry);
616 registry->priv->plugins = g_list_remove (registry->priv->plugins, plugin);
617 if (G_LIKELY (plugin->basename))
618 g_hash_table_remove (registry->priv->basename_hash, plugin->basename);
619 gst_registry_remove_features_for_plugin_unlocked (registry, plugin);
620 GST_OBJECT_UNLOCK (registry);
621 gst_object_unref (plugin);
622 }
623
624 /**
625 * gst_registry_add_feature:
626 * @registry: the registry to add the plugin to
627 * @feature: (transfer full): the feature to add
628 *
629 * Add the feature to the registry. The feature-added signal will be emitted.
630 * This function sinks @feature.
631 *
632 * Returns: %TRUE on success.
633 *
634 * MT safe.
635 */
636 gboolean
637 gst_registry_add_feature (GstRegistry * registry, GstPluginFeature * feature)
638 {
639 GstPluginFeature *existing_feature;
640
641 g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
642 g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), FALSE);
643 g_return_val_if_fail (GST_OBJECT_NAME (feature) != NULL, FALSE);
644 g_return_val_if_fail (feature->plugin_name != NULL, FALSE);
645
646 GST_OBJECT_LOCK (registry);
647 existing_feature = gst_registry_lookup_feature_locked (registry,
648 GST_OBJECT_NAME (feature));
649 if (G_UNLIKELY (existing_feature)) {
650 GST_DEBUG_OBJECT (registry, "replacing existing feature %p (%s)",
651 existing_feature, GST_OBJECT_NAME (feature));
652 /* Remove the existing feature from the list now, before we insert the new
653 * one, but don't unref yet because the hash is still storing a reference to
654 * it. */
655 registry->priv->features =
656 g_list_remove (registry->priv->features, existing_feature);
657 }
658
659 GST_DEBUG_OBJECT (registry, "adding feature %p (%s)", feature,
660 GST_OBJECT_NAME (feature));
661
662 registry->priv->features = g_list_prepend (registry->priv->features, feature);
663 g_hash_table_replace (registry->priv->feature_hash, GST_OBJECT_NAME (feature),
664 feature);
665
666 if (G_UNLIKELY (existing_feature)) {
667 /* We unref now. No need to remove the feature name from the hash table, it
668 * got replaced by the new feature */
669 gst_object_unparent (GST_OBJECT_CAST (existing_feature));
670 }
671
672 gst_object_set_parent (GST_OBJECT_CAST (feature), GST_OBJECT_CAST (registry));
673
674 registry->priv->cookie++;
675 GST_OBJECT_UNLOCK (registry);
676
677 GST_LOG_OBJECT (registry, "emitting feature-added for %s",
678 GST_OBJECT_NAME (feature));
679 g_signal_emit (registry, gst_registry_signals[FEATURE_ADDED], 0, feature);
680
681 return TRUE;
682 }
683
684 /**
685 * gst_registry_remove_feature:
686 * @registry: the registry to remove the feature from
687 * @feature: (transfer none): the feature to remove
688 *
689 * Remove the feature from the registry.
690 *
691 * MT safe.
692 */
693 void
694 gst_registry_remove_feature (GstRegistry * registry, GstPluginFeature * feature)
695 {
696 g_return_if_fail (GST_IS_REGISTRY (registry));
697 g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
698
699 GST_DEBUG_OBJECT (registry, "removing feature %p (%s)",
700 feature, gst_plugin_feature_get_name (feature));
701
702 GST_OBJECT_LOCK (registry);
703 registry->priv->features = g_list_remove (registry->priv->features, feature);
704 g_hash_table_remove (registry->priv->feature_hash, GST_OBJECT_NAME (feature));
705 registry->priv->cookie++;
706 GST_OBJECT_UNLOCK (registry);
707
708 gst_object_unparent ((GstObject *) feature);
709 }
710
711 /**
712 * gst_registry_plugin_filter:
713 * @registry: registry to query
714 * @filter: (scope call): the filter to use
715 * @first: only return first match
716 * @user_data: (closure): user data passed to the filter function
717 *
718 * Runs a filter against all plugins in the registry and returns a #GList with
719 * the results. If the first flag is set, only the first match is
720 * returned (as a list with a single object).
721 * Every plugin is reffed; use gst_plugin_list_free() after use, which
722 * will unref again.
723 *
724 * Returns: (transfer full) (element-type Gst.Plugin): a #GList of #GstPlugin.
725 * Use gst_plugin_list_free() after usage.
726 *
727 * MT safe.
728 */
729 GList *
730 gst_registry_plugin_filter (GstRegistry * registry,
731 GstPluginFilter filter, gboolean first, gpointer user_data)
732 {
733 GList *list = NULL;
734
735 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
736
737 GST_OBJECT_LOCK (registry);
738 {
739 const GList *walk;
740
741 for (walk = registry->priv->plugins; walk != NULL; walk = walk->next) {
742 GstPlugin *plugin = walk->data;
743
744 if (filter == NULL || filter (plugin, user_data)) {
745 list = g_list_prepend (list, gst_object_ref (plugin));
746
747 if (first)
748 break;
749 }
750 }
751 }
752 GST_OBJECT_UNLOCK (registry);
753
754 return list;
755 }
756
757 typedef struct
758 {
759 const gchar *name;
760 GType type;
761 } GstTypeNameData;
762
763 static gboolean
764 gst_plugin_feature_type_name_filter (GstPluginFeature * feature,
765 GstTypeNameData * data)
766 {
767 g_assert (GST_IS_PLUGIN_FEATURE (feature));
768
769 return ((data->type == 0 || data->type == G_OBJECT_TYPE (feature)) &&
770 (data->name == NULL || !strcmp (data->name, GST_OBJECT_NAME (feature))));
771 }
772
773 /* returns TRUE if the list was changed
774 *
775 * Must be called with the object lock taken */
776 static gboolean
777 gst_registry_get_feature_list_or_create (GstRegistry * registry,
778 GList ** previous, guint32 * cookie, GType type)
779 {
780 gboolean res = FALSE;
781 GstRegistryPrivate *priv = registry->priv;
782
783 if (G_UNLIKELY (!*previous || priv->cookie != *cookie)) {
784 GstTypeNameData data;
785 const GList *walk;
786
787 if (*previous) {
788 gst_plugin_feature_list_free (*previous);
789 *previous = NULL;
790 }
791
792 data.type = type;
793 data.name = NULL;
794
795 for (walk = registry->priv->features; walk != NULL; walk = walk->next) {
796 GstPluginFeature *feature = walk->data;
797
798 if (gst_plugin_feature_type_name_filter (feature, &data)) {
799 *previous = g_list_prepend (*previous, gst_object_ref (feature));
800 }
801 }
802
803 *cookie = priv->cookie;
804 res = TRUE;
805 }
806
807 return res;
808 }
809
810 static gint
811 type_find_factory_rank_cmp (const GstPluginFeature * fac1,
812 const GstPluginFeature * fac2)
813 {
814 if (G_LIKELY (fac1->rank != fac2->rank))
815 return fac2->rank - fac1->rank;
816
817 /* to make the order in which things happen more deterministic,
818 * sort by name when the ranks are the same. */
819 return strcmp (GST_OBJECT_NAME (fac1), GST_OBJECT_NAME (fac2));
820 }
821
822 static GList *
823 gst_registry_get_element_factory_list (GstRegistry * registry)
824 {
825 GList *list;
826
827 GST_OBJECT_LOCK (registry);
828
829 gst_registry_get_feature_list_or_create (registry,
830 ®istry->priv->element_factory_list, ®istry->priv->efl_cookie,
831 GST_TYPE_ELEMENT_FACTORY);
832
833 /* Return reffed copy */
834 list = gst_plugin_feature_list_copy (registry->priv->element_factory_list);
835
836 GST_OBJECT_UNLOCK (registry);
837
838 return list;
839 }
840
841 static GList *
842 gst_registry_get_typefind_factory_list (GstRegistry * registry)
843 {
844 GList *list;
845
846 GST_OBJECT_LOCK (registry);
847
848 if (G_UNLIKELY (gst_registry_get_feature_list_or_create (registry,
849 ®istry->priv->typefind_factory_list,
850 ®istry->priv->tfl_cookie, GST_TYPE_TYPE_FIND_FACTORY)))
851 registry->priv->typefind_factory_list =
852 g_list_sort (registry->priv->typefind_factory_list,
853 (GCompareFunc) type_find_factory_rank_cmp);
854
855 /* Return reffed copy */
856 list = gst_plugin_feature_list_copy (registry->priv->typefind_factory_list);
857
858 GST_OBJECT_UNLOCK (registry);
859
860 return list;
861 }
862
863 #ifndef GSTREAMER_LITE
864 static GList *
865 gst_registry_get_device_provider_factory_list (GstRegistry * registry)
866 {
867 GList *list;
868
869 GST_OBJECT_LOCK (registry);
870
871 gst_registry_get_feature_list_or_create (registry,
872 ®istry->priv->device_provider_factory_list,
873 ®istry->priv->dmfl_cookie, GST_TYPE_DEVICE_PROVIDER_FACTORY);
874
875 /* Return reffed copy */
876 list =
877 gst_plugin_feature_list_copy (registry->
878 priv->device_provider_factory_list);
879
880 GST_OBJECT_UNLOCK (registry);
881
882 return list;
883 }
884 #endif // GSTREAMER_LITE
885
886 /**
887 * gst_registry_feature_filter:
888 * @registry: registry to query
889 * @filter: (scope call): the filter to use
890 * @first: only return first match
891 * @user_data: (closure): user data passed to the filter function
892 *
893 * Runs a filter against all features of the plugins in the registry
894 * and returns a GList with the results.
895 * If the first flag is set, only the first match is
896 * returned (as a list with a single object).
897 *
898 * Returns: (transfer full) (element-type Gst.PluginFeature): a #GList of
899 * #GstPluginFeature. Use gst_plugin_feature_list_free() after usage.
900 *
901 * MT safe.
902 */
903 GList *
904 gst_registry_feature_filter (GstRegistry * registry,
905 GstPluginFeatureFilter filter, gboolean first, gpointer user_data)
906 {
907 GList *list = NULL;
908
909 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
910
911 GST_OBJECT_LOCK (registry);
912 {
913 const GList *walk;
914
915 for (walk = registry->priv->features; walk != NULL; walk = walk->next) {
916 GstPluginFeature *feature = walk->data;
917
918 if (filter == NULL || filter (feature, user_data)) {
919 list = g_list_prepend (list, gst_object_ref (feature));
920
921 if (first)
922 break;
923 }
924 }
925 }
926 GST_OBJECT_UNLOCK (registry);
927
928 return list;
929 }
930
931 static gboolean
932 gst_registry_plugin_name_filter (GstPlugin * plugin, const gchar * name)
933 {
934 return (plugin->desc.name && !strcmp (plugin->desc.name, name));
935 }
936
937 /**
938 * gst_registry_find_plugin:
939 * @registry: the registry to search
940 * @name: the plugin name to find
941 *
942 * Find the plugin with the given name in the registry.
943 * The plugin will be reffed; caller is responsible for unreffing.
944 *
945 * Returns: (transfer full) (nullable): the plugin with the given name
946 * or %NULL if the plugin was not found. gst_object_unref() after
947 * usage.
948 *
949 * MT safe.
950 */
951 GstPlugin *
952 gst_registry_find_plugin (GstRegistry * registry, const gchar * name)
953 {
954 GList *walk;
955 GstPlugin *result = NULL;
956
957 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
958 g_return_val_if_fail (name != NULL, NULL);
959
960 walk = gst_registry_plugin_filter (registry,
961 (GstPluginFilter) gst_registry_plugin_name_filter, TRUE, (gpointer) name);
962 if (walk) {
963 result = GST_PLUGIN_CAST (walk->data);
964
965 gst_object_ref (result);
966 gst_plugin_list_free (walk);
967 }
968
969 return result;
970 }
971
972 /**
973 * gst_registry_find_feature:
974 * @registry: the registry to search
975 * @name: the pluginfeature name to find
976 * @type: the pluginfeature type to find
977 *
978 * Find the pluginfeature with the given name and type in the registry.
979 *
980 * Returns: (transfer full) (nullable): the pluginfeature with the
981 * given name and type or %NULL if the plugin was not
982 * found. gst_object_unref() after usage.
983 *
984 * MT safe.
985 */
986 GstPluginFeature *
987 gst_registry_find_feature (GstRegistry * registry, const gchar * name,
988 GType type)
989 {
990 GstPluginFeature *feature = NULL;
991
992 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
993 g_return_val_if_fail (name != NULL, NULL);
994 g_return_val_if_fail (g_type_is_a (type, GST_TYPE_PLUGIN_FEATURE), NULL);
995
996 feature = gst_registry_lookup_feature (registry, name);
997 if (feature && !g_type_is_a (G_TYPE_FROM_INSTANCE (feature), type)) {
998 gst_object_unref (feature);
999 feature = NULL;
1000 }
1001
1002 return feature;
1003 }
1004
1005 /**
1006 * gst_registry_get_feature_list:
1007 * @registry: a #GstRegistry
1008 * @type: a #GType.
1009 *
1010 * Retrieves a #GList of #GstPluginFeature of @type.
1011 *
1012 * Returns: (transfer full) (element-type Gst.PluginFeature): a #GList of
1013 * #GstPluginFeature of @type. Use gst_plugin_feature_list_free() after use
1014 *
1015 * MT safe.
1016 */
1017 GList *
1018 gst_registry_get_feature_list (GstRegistry * registry, GType type)
1019 {
1020 GstTypeNameData data;
1021
1022 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
1023 g_return_val_if_fail (g_type_is_a (type, GST_TYPE_PLUGIN_FEATURE), NULL);
1024
1025 /* Speed up */
1026 if (type == GST_TYPE_ELEMENT_FACTORY)
1027 return gst_registry_get_element_factory_list (registry);
1028 else if (type == GST_TYPE_TYPE_FIND_FACTORY)
1029 return gst_registry_get_typefind_factory_list (registry);
1030 #ifndef GSTREAMER_LITE
1031 else if (type == GST_TYPE_DEVICE_PROVIDER_FACTORY)
1032 return gst_registry_get_device_provider_factory_list (registry);
1033 #endif // GSTREAMER_LITE
1034
1035 data.type = type;
1036 data.name = NULL;
1037
1038 return gst_registry_feature_filter (registry,
1039 (GstPluginFeatureFilter) gst_plugin_feature_type_name_filter,
1040 FALSE, &data);
1041 }
1042
1043 /**
1044 * gst_registry_get_plugin_list:
1045 * @registry: the registry to search
1046 *
1047 * Get a copy of all plugins registered in the given registry. The refcount
1048 * of each element in the list in incremented.
1049 *
1050 * Returns: (transfer full) (element-type Gst.Plugin): a #GList of #GstPlugin.
1051 * Use gst_plugin_list_free() after usage.
1052 *
1053 * MT safe.
1054 */
1055 GList *
1056 gst_registry_get_plugin_list (GstRegistry * registry)
1057 {
1058 GList *list;
1059 GList *g;
1060
1061 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
1062
1063 GST_OBJECT_LOCK (registry);
1064 list = g_list_copy (registry->priv->plugins);
1065 for (g = list; g; g = g->next) {
1066 gst_object_ref (GST_PLUGIN_CAST (g->data));
1067 }
1068 GST_OBJECT_UNLOCK (registry);
1069
1070 return list;
1071 }
1072
1073 static GstPluginFeature *
1074 gst_registry_lookup_feature_locked (GstRegistry * registry, const char *name)
1075 {
1076 return g_hash_table_lookup (registry->priv->feature_hash, name);
1077 }
1078
1079 /**
1080 * gst_registry_lookup_feature:
1081 * @registry: a #GstRegistry
1082 * @name: a #GstPluginFeature name
1083 *
1084 * Find a #GstPluginFeature with @name in @registry.
1085 *
1086 * Returns: (transfer full): a #GstPluginFeature with its refcount incremented,
1087 * use gst_object_unref() after usage.
1088 *
1089 * MT safe.
1090 */
1091 GstPluginFeature *
1092 gst_registry_lookup_feature (GstRegistry * registry, const char *name)
1093 {
1094 GstPluginFeature *feature;
1095
1096 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
1097 g_return_val_if_fail (name != NULL, NULL);
1098
1099 GST_OBJECT_LOCK (registry);
1100 feature = gst_registry_lookup_feature_locked (registry, name);
1101 if (feature)
1102 gst_object_ref (feature);
1103 GST_OBJECT_UNLOCK (registry);
1104
1105 return feature;
1106 }
1107
1108 static GstPlugin *
1109 gst_registry_lookup_bn_locked (GstRegistry * registry, const char *basename)
1110 {
1111 return g_hash_table_lookup (registry->priv->basename_hash, basename);
1112 }
1113
1114 static GstPlugin *
1115 gst_registry_lookup_bn (GstRegistry * registry, const char *basename)
1116 {
1117 GstPlugin *plugin;
1118
1119 GST_OBJECT_LOCK (registry);
1120 plugin = gst_registry_lookup_bn_locked (registry, basename);
1121 if (plugin)
1122 gst_object_ref (plugin);
1123 GST_OBJECT_UNLOCK (registry);
1124
1125 return plugin;
1126 }
1127
1128 /**
1129 * gst_registry_lookup:
1130 * @registry: the registry to look up in
1131 * @filename: the name of the file to look up
1132 *
1133 * Look up a plugin in the given registry with the given filename.
1134 * If found, plugin is reffed.
1135 *
1136 * Returns: (transfer full) (nullable): the #GstPlugin if found, or
1137 * %NULL if not. gst_object_unref() after usage.
1138 */
1139 GstPlugin *
1140 gst_registry_lookup (GstRegistry * registry, const char *filename)
1141 {
1142 GstPlugin *plugin;
1143 gchar *basename;
1144
1145 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
1146 g_return_val_if_fail (filename != NULL, NULL);
1147
1148 basename = g_path_get_basename (filename);
1149 if (G_UNLIKELY (basename == NULL))
1150 return NULL;
1151
1152 plugin = gst_registry_lookup_bn (registry, basename);
1153
1154 g_free (basename);
1155
1156 return plugin;
1157 }
1158
1159 typedef enum
1160 {
1161 REGISTRY_SCAN_HELPER_NOT_STARTED = 0,
1162 REGISTRY_SCAN_HELPER_DISABLED,
1163 REGISTRY_SCAN_HELPER_RUNNING
1164 } GstRegistryScanHelperState;
1165
1166 typedef struct
1167 {
1168 GstRegistry *registry;
1169 GstRegistryScanHelperState helper_state;
1170 GstPluginLoader *helper;
1171 gboolean changed;
1172 } GstRegistryScanContext;
1173
1174 static void
1175 init_scan_context (GstRegistryScanContext * context, GstRegistry * registry)
1176 {
1177 gboolean do_fork;
1178
1179 context->registry = registry;
1180
1181 /* see if forking is enabled and set up the scan helper state accordingly */
1182 do_fork = _gst_enable_registry_fork;
1183 if (do_fork) {
1184 const gchar *fork_env;
1185
1186 /* forking enabled, see if it is disabled with an env var */
1187 if ((fork_env = g_getenv ("GST_REGISTRY_FORK"))) {
1188 /* fork enabled for any value different from "no" */
1189 do_fork = strcmp (fork_env, "no") != 0;
1190 }
1191 }
1192
1193 if (do_fork)
1194 context->helper_state = REGISTRY_SCAN_HELPER_NOT_STARTED;
1195 else
1196 context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
1197
1198 context->helper = NULL;
1199 context->changed = FALSE;
1200 }
1201
1202 static void
1203 clear_scan_context (GstRegistryScanContext * context)
1204 {
1205 if (context->helper) {
1206 context->changed |= _priv_gst_plugin_loader_funcs.destroy (context->helper);
1207 context->helper = NULL;
1208 }
1209 }
1210
1211 static gboolean
1212 gst_registry_scan_plugin_file (GstRegistryScanContext * context,
1213 const gchar * filename, off_t file_size, time_t file_mtime)
1214 {
1215 gboolean changed = FALSE;
1216 GstPlugin *newplugin = NULL;
1217
1218 #ifdef G_OS_WIN32
1219 /* Disable external plugin loader on Windows until it is ported properly. */
1220 context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
1221 #endif
1222
1223
1224 /* Have a plugin to load - see if the scan-helper needs starting */
1225 if (context->helper_state == REGISTRY_SCAN_HELPER_NOT_STARTED) {
1226 GST_DEBUG ("Starting plugin scanner for file %s", filename);
1227 context->helper = _priv_gst_plugin_loader_funcs.create (context->registry);
1228 if (context->helper != NULL)
1229 context->helper_state = REGISTRY_SCAN_HELPER_RUNNING;
1230 else {
1231 GST_WARNING ("Failed starting plugin scanner. Scanning in-process");
1232 context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
1233 }
1234 }
1235
1236 if (context->helper_state == REGISTRY_SCAN_HELPER_RUNNING) {
1237 GST_DEBUG ("Using scan-helper to load plugin %s", filename);
1238 if (!_priv_gst_plugin_loader_funcs.load (context->helper,
1239 filename, file_size, file_mtime)) {
1240 g_warning ("External plugin loader failed. This most likely means that "
1241 "the plugin loader helper binary was not found or could not be run. "
1242 "You might need to set the GST_PLUGIN_SCANNER environment variable "
1243 "if your setup is unusual. This should normally not be required "
1244 "though.");
1245 context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
1246 }
1247 }
1248
1249 /* Check if the helper is disabled (or just got disabled above) */
1250 if (context->helper_state == REGISTRY_SCAN_HELPER_DISABLED) {
1251 /* Load plugin the old fashioned way... */
1252
1253 /* We don't use a GError here because a failure to load some shared
1254 * objects as plugins is normal (particularly in the uninstalled case)
1255 */
1256 newplugin = gst_plugin_load_file (filename, NULL);
1257 }
1258
1259 if (newplugin) {
1260 GST_DEBUG_OBJECT (context->registry, "marking new plugin %p as registered",
1261 newplugin);
1262 newplugin->registered = TRUE;
1263 gst_object_unref (newplugin);
1264 changed = TRUE;
1265 }
1266 #ifndef GST_DISABLE_REGISTRY
1267 if (!__registry_reuse_plugin_scanner) {
1268 clear_scan_context (context);
1269 context->helper_state = REGISTRY_SCAN_HELPER_NOT_STARTED;
1270 }
1271 #endif
1272
1273 return changed;
1274 }
1275
1276 #ifndef GSTREAMER_LITE
1277 static gboolean
1278 is_blacklisted_hidden_directory (const gchar * dirent)
1279 {
1280 if (G_LIKELY (dirent[0] != '.'))
1281 return FALSE;
1282
1283 /* skip the .debug directory, these contain elf files that are not
1284 * useful or worse, can crash dlopen () */
1285 if (strcmp (dirent, ".debug") == 0)
1286 return TRUE;
1287
1288 /* can also skip .git and .deps dirs, those won't contain useful files.
1289 * This speeds up scanning a bit in uninstalled setups. */
1290 if (strcmp (dirent, ".git") == 0 || strcmp (dirent, ".deps") == 0)
1291 return TRUE;
1292
1293 return FALSE;
1294 }
1295 #endif
1296
1297 static gboolean
1298 gst_registry_scan_path_level (GstRegistryScanContext * context,
1299 const gchar * path, int level)
1300 {
1301 #ifndef GSTREAMER_LITE
1302 GDir *dir;
1303 const gchar *dirent;
1304 #endif // GSTREAMER_LITE
1305 gchar *filename;
1306 GstPlugin *plugin;
1307 gboolean changed = FALSE;
1308 #ifdef GSTREAMER_LITE
1309 gint gstlite_plugins_list_index = 0;
1310 struct stat file_status;
1311 gchar *filename_partial;
1312 #ifdef LINUX
1313 void *avcHandle = NULL;
1314 gboolean isAVCFFMPEG = FALSE;
1315 #endif // LINUX
1316 #endif // GSTREAMER_LITE
1317
1318 #ifndef GSTREAMER_LITE
1319 dir = g_dir_open (path, 0, NULL);
1320 if (!dir)
1321 return FALSE;
1322
1323 while ((dirent = g_dir_read_name (dir))) {
1324 GStatBuf file_status;
1325
1326 filename = g_build_filename (path, dirent, NULL);
1327 if (g_stat (filename, &file_status) < 0) {
1328 /* Plugin will be removed from cache after the scan completes if it
1329 * is still marked 'cached' */
1330 g_free (filename);
1331 continue;
1332 }
1333
1334 if (file_status.st_mode & S_IFDIR) {
1335 if (G_UNLIKELY (is_blacklisted_hidden_directory (dirent))) {
1336 GST_TRACE_OBJECT (context->registry, "ignoring %s directory", dirent);
1337 g_free (filename);
1338 continue;
1339 }
1340 /* FIXME 0.11: Don't recurse into directories, this behaviour
1341 * is inconsistent with other PATH environment variables
1342 */
1343 if (level > 0) {
1344 GST_LOG_OBJECT (context->registry, "recursing into directory %s",
1345 filename);
1346 changed |= gst_registry_scan_path_level (context, filename, level - 1);
1347 } else {
1348 GST_LOG_OBJECT (context->registry, "not recursing into directory %s, "
1349 "recursion level too deep", filename);
1350 }
1351 g_free (filename);
1352 continue;
1353 }
1354 if (!(file_status.st_mode & S_IFREG)) {
1355 GST_TRACE_OBJECT (context->registry, "%s is not a regular file, ignoring",
1356 filename);
1357 g_free (filename);
1358 continue;
1359 }
1360 if (!g_str_has_suffix (dirent, G_MODULE_SUFFIX)
1361 #ifdef GST_EXTRA_MODULE_SUFFIX
1362 && !g_str_has_suffix (dirent, GST_EXTRA_MODULE_SUFFIX)
1363 #endif
1364 ) {
1365 GST_TRACE_OBJECT (context->registry,
1366 "extension is not recognized as module file, ignoring file %s",
1367 filename);
1368 g_free (filename);
1369 continue;
1370 }
1371 #else // GSTREAMER_LITE
1372
1373 for (gstlite_plugins_list_index = 0; gstlite_plugins_list[gstlite_plugins_list_index] != NULL; gstlite_plugins_list_index++) {
1374 filename_partial = g_build_filename (path, gstlite_plugins_list[gstlite_plugins_list_index], NULL);
1375 #ifdef LINUX
1376 if (g_str_has_suffix(filename_partial, "libavplugin")) { // Check libav version and load correspondent module.
1377 int plugin_version = 0;
1378 // Look for libavcodec and check its version to figure out if it is
1379 // libav or ffmpeg. Starting from 57 and up
1380 int vi = (sizeof(AVCODEC_EXPLICIT_VERSIONS)/sizeof(AVCODEC_EXPLICIT_VERSIONS[0]));
1381 while(!avcHandle && --vi >= 0) {
1382 int version = AVCODEC_EXPLICIT_VERSIONS[vi];
1383 gchar* libname = g_strdup_printf("libavcodec.so.%d", version);
1384 avcHandle = dlopen(libname, RTLD_NOW);
1385 g_free(libname);
1386 }
1387
1388 // Check if it is libav or ffmpeg
1389 if (avcHandle) {
1390 unsigned int (*av_version)(void);
1391 av_version = dlsym(avcHandle, "avcodec_version");
1392 if (av_version != NULL) {
1393 unsigned int version = (*av_version)();
1394 unsigned int micro = version & 0xFF;
1395 if (micro >= 100)
1396 isAVCFFMPEG = TRUE;
1397 plugin_version = AVCODEC_EXPLICIT_VERSIONS[vi];
1398 } else { // Something wrong
1399 dlclose(avcHandle);
1400 avcHandle = NULL;
1401 }
1402 }
1403
1404 // Look for libavcodec-ffmpeg. For 56 only
1405 if (avcHandle == NULL) {
1406 vi = (sizeof(AVCODEC_FFMPEG_EXPLICIT_VERSIONS)/sizeof(AVCODEC_FFMPEG_EXPLICIT_VERSIONS[0]));
1407 while(!avcHandle && --vi >= 0) {
1408 int version = AVCODEC_FFMPEG_EXPLICIT_VERSIONS[vi];
1409 gchar* libname = g_strdup_printf("libavcodec-ffmpeg.so.%d", version);
1410 avcHandle = dlopen(libname, RTLD_NOW);
1411 g_free(libname);
1412 }
1413
1414 if (avcHandle) {
1415 plugin_version = AVCODEC_FFMPEG_EXPLICIT_VERSIONS[vi];
1416 isAVCFFMPEG = TRUE;
1417 }
1418 }
1419
1420 // Looks for libav 56 and below
1421 if (avcHandle == NULL) {
1422 vi = (sizeof(AVCODEC_LIBAV_EXPLICIT_VERSIONS)/sizeof(AVCODEC_LIBAV_EXPLICIT_VERSIONS[0]));
1423 while(!avcHandle && --vi >= 0) {
1424 int version = AVCODEC_LIBAV_EXPLICIT_VERSIONS[vi];
1425 gchar* libname = g_strdup_printf("libavcodec.so.%d", version);
1426 avcHandle = dlopen(libname, RTLD_NOW);
1427 g_free(libname);
1428 }
1429
1430 if (avcHandle) {
1431 plugin_version = AVCODEC_LIBAV_EXPLICIT_VERSIONS[vi];
1432 }
1433 }
1434
1435 if (avcHandle) {
1436 dlclose(avcHandle);
1437 avcHandle = NULL;
1438
1439 // Try simple name first. OpenJDK build may contain the latest bits.
1440 filename = g_strdup_printf("%s%s", filename_partial, GST_EXTRA_MODULE_SUFFIX);
1441 if (g_stat (filename, &file_status) < 0) { // Not available, create a versioned filename
1442 g_free(filename);
1443 if (isAVCFFMPEG)
1444 filename = g_strdup_printf("%s-ffmpeg-%d%s", filename_partial, plugin_version, GST_EXTRA_MODULE_SUFFIX);
1445 else
1446 filename = g_strdup_printf("%s-%d%s", filename_partial, plugin_version, GST_EXTRA_MODULE_SUFFIX);
1447 }
1448 } else {
1449 g_free(filename_partial);
1450 continue; // No libavcodec.so installed.
1451 }
1452 } else {
1453 filename = g_strconcat(filename_partial, GST_EXTRA_MODULE_SUFFIX, NULL);
1454 }
1455 #else
1456 filename = g_strconcat(filename_partial, GST_EXTRA_MODULE_SUFFIX, NULL);
1457 #endif
1458 g_free(filename_partial);
1459
1460 if (g_stat (filename, &file_status) < 0) {
1461 /* Plugin will be removed from cache after the scan completes if it
1462 * is still marked 'cached' */
1463 g_free (filename);
1464 continue;
1465 }
1466 #endif // GSTREAMER_LITE
1467
1468 GST_LOG_OBJECT (context->registry, "file %s looks like a possible module",
1469 filename);
1470
1471 #ifndef GSTREAMER_LITE
1472 /* try to avoid unnecessary plugin-move pain */
1473 if (g_str_has_prefix (dirent, "libgstvalve") ||
1474 g_str_has_prefix (dirent, "libgstselector")) {
1475 GST_WARNING_OBJECT (context->registry, "ignoring old plugin %s which "
1476 "has been merged into the corelements plugin", filename);
1477 /* Plugin will be removed from cache after the scan completes if it
1478 * is still marked 'cached' */
1479 g_free (filename);
1480 continue;
1481 }
1482
1483 /* plug-ins are considered unique by basename; if the given name
1484 * was already seen by the registry, we ignore it */
1485 plugin = gst_registry_lookup_bn (context->registry, dirent);
1486 #else
1487 plugin = gst_registry_lookup (context->registry, filename);
1488 #endif
1489 if (plugin) {
1490 gboolean env_vars_changed, deps_changed = FALSE;
1491
1492 if (plugin->registered) {
1493 GST_DEBUG_OBJECT (context->registry,
1494 "plugin already registered from path \"%s\"",
1495 GST_STR_NULL (plugin->filename));
1496 g_free (filename);
1497 gst_object_unref (plugin);
1498 continue;
1499 }
1500
1501 env_vars_changed = _priv_plugin_deps_env_vars_changed (plugin);
1502
1503 /* If a file with a certain basename is seen on a different path,
1504 * update the plugin to ensure the registry cache will reflect up
1505 * to date information */
1506
1507 if (plugin->file_mtime == file_status.st_mtime &&
1508 plugin->file_size == file_status.st_size && !env_vars_changed &&
1509 !(deps_changed = _priv_plugin_deps_files_changed (plugin)) &&
1510 !strcmp (plugin->filename, filename)) {
1511 GST_LOG_OBJECT (context->registry, "file %s cached", filename);
1512 GST_OBJECT_FLAG_UNSET (plugin, GST_PLUGIN_FLAG_CACHED);
1513 GST_LOG_OBJECT (context->registry,
1514 "marking plugin %p as registered as %s", plugin, filename);
1515 plugin->registered = TRUE;
1516 } else {
1517 GST_INFO_OBJECT (context->registry, "cached info for %s is stale",
1518 filename);
1519 GST_DEBUG_OBJECT (context->registry, "mtime %" G_GINT64_FORMAT " != %"
1520 G_GINT64_FORMAT " or size %" G_GINT64_FORMAT " != %"
1521 G_GINT64_FORMAT " or external dependency env_vars changed: %d or"
1522 " external dependencies changed: %d or old path %s != new path %s",
1523 (gint64) plugin->file_mtime, (gint64) file_status.st_mtime,
1524 (gint64) plugin->file_size, (gint64) file_status.st_size,
1525 env_vars_changed, deps_changed, plugin->filename, filename);
1526 gst_registry_remove_plugin (context->registry, plugin);
1527 changed |= gst_registry_scan_plugin_file (context, filename,
1528 file_status.st_size, file_status.st_mtime);
1529 }
1530 gst_object_unref (plugin);
1531
1532 } else {
1533 GST_DEBUG_OBJECT (context->registry, "file %s not yet in registry",
1534 filename);
1535 changed |= gst_registry_scan_plugin_file (context, filename,
1536 file_status.st_size, file_status.st_mtime);
1537 }
1538
1539 g_free (filename);
1540 }
1541
1542 #ifndef GSTREAMER_LITE
1543 g_dir_close (dir);
1544 #endif // GSTREAMER_LITE
1545
1546 return changed;
1547 }
1548
1549 static gboolean
1550 gst_registry_scan_path_internal (GstRegistryScanContext * context,
1551 const gchar * path)
1552 {
1553 gboolean changed;
1554
1555 GST_DEBUG_OBJECT (context->registry, "scanning path %s", path);
1556 #ifndef GSTREAMER_LITE
1557 changed = gst_registry_scan_path_level (context, path, 10);
1558 #else // GSTREAMER_LITE
1559 changed = gst_registry_scan_path_level (context, path, 0);
1560 #endif // GSTREAMER_LITE
1561
1562 GST_DEBUG_OBJECT (context->registry, "registry changed in path %s: %d", path,
1563 changed);
1564 return changed;
1565 }
1566
1567 /**
1568 * gst_registry_scan_path:
1569 * @registry: the registry to add found plugins to
1570 * @path: the path to scan
1571 *
1572 * Scan the given path for plugins to add to the registry. The syntax of the
1573 * path is specific to the registry.
1574 *
1575 * Returns: %TRUE if registry changed
1576 */
1577 gboolean
1578 gst_registry_scan_path (GstRegistry * registry, const gchar * path)
1579 {
1580 GstRegistryScanContext context;
1581 gboolean result;
1582
1583 g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
1584 g_return_val_if_fail (path != NULL, FALSE);
1585
1586 init_scan_context (&context, registry);
1587
1588 result = gst_registry_scan_path_internal (&context, path);
1589
1590 clear_scan_context (&context);
1591 result |= context.changed;
1592
1593 return result;
1594 }
1595
1596 static gboolean
1597 _gst_plugin_feature_filter_plugin_name (GstPluginFeature * feature,
1598 gpointer user_data)
1599 {
1600 return (strcmp (feature->plugin_name, (gchar *) user_data) == 0);
1601 }
1602
1603 /**
1604 * gst_registry_get_feature_list_by_plugin:
1605 * @registry: a #GstRegistry.
1606 * @name: a plugin name.
1607 *
1608 * Retrieves a #GList of features of the plugin with name @name.
1609 *
1610 * Returns: (transfer full) (element-type Gst.PluginFeature): a #GList of
1611 * #GstPluginFeature. Use gst_plugin_feature_list_free() after usage.
1612 */
1613 GList *
1614 gst_registry_get_feature_list_by_plugin (GstRegistry * registry,
1615 const gchar * name)
1616 {
1617 g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
1618 g_return_val_if_fail (name != NULL, NULL);
1619
1620 return gst_registry_feature_filter (registry,
1621 _gst_plugin_feature_filter_plugin_name, FALSE, (gpointer) name);
1622 }
1623
1624 /* Unref and delete the default registry */
1625 void
1626 _priv_gst_registry_cleanup (void)
1627 {
1628 GstRegistry *registry;
1629
1630 g_mutex_lock (&_gst_registry_mutex);
1631 if ((registry = _gst_registry_default) != NULL) {
1632 _gst_registry_default = NULL;
1633 }
1634 g_mutex_unlock (&_gst_registry_mutex);
1635
1636 /* unref outside of the lock because we can. */
1637 if (registry)
1638 gst_object_unref (registry);
1639 }
1640
1641 /**
1642 * gst_registry_check_feature_version:
1643 * @registry: a #GstRegistry
1644 * @feature_name: the name of the feature (e.g. "oggdemux")
1645 * @min_major: the minimum major version number
1646 * @min_minor: the minimum minor version number
1647 * @min_micro: the minimum micro version number
1648 *
1649 * Checks whether a plugin feature by the given name exists in
1650 * @registry and whether its version is at least the
1651 * version required.
1652 *
1653 * Returns: %TRUE if the feature could be found and the version is
1654 * the same as the required version or newer, and %FALSE otherwise.
1655 */
1656 gboolean
1657 gst_registry_check_feature_version (GstRegistry * registry,
1658 const gchar * feature_name, guint min_major, guint min_minor,
1659 guint min_micro)
1660 {
1661 GstPluginFeature *feature;
1662 gboolean ret = FALSE;
1663
1664 g_return_val_if_fail (feature_name != NULL, FALSE);
1665
1666 GST_DEBUG ("Looking up plugin feature '%s'", feature_name);
1667
1668 feature = gst_registry_lookup_feature (registry, feature_name);
1669 if (feature) {
1670 ret = gst_plugin_feature_check_version (feature, min_major, min_minor,
1671 min_micro);
1672 gst_object_unref (feature);
1673 } else {
1674 GST_DEBUG ("Could not find plugin feature '%s'", feature_name);
1675 }
1676
1677 return ret;
1678 }
1679
1680 static void
1681 load_plugin_func (gpointer data, gpointer user_data)
1682 {
1683 GstPlugin *plugin;
1684 const gchar *filename;
1685 GError *err = NULL;
1686
1687 filename = (const gchar *) data;
1688 GST_DEBUG ("Pre-loading plugin %s", filename);
1689
1690 plugin = gst_plugin_load_file (filename, &err);
1691
1692 if (plugin) {
1693 GST_INFO ("Loaded plugin: \"%s\"", filename);
1694
1695 gst_registry_add_plugin (gst_registry_get (), plugin);
1696 } else {
1697 if (err) {
1698 /* Report error to user, and free error */
1699 GST_ERROR ("Failed to load plugin: %s", err->message);
1700 g_error_free (err);
1701 } else {
1702 GST_WARNING ("Failed to load plugin: \"%s\"", filename);
1703 }
1704 }
1705 }
1706
1707 #ifndef GST_DISABLE_REGISTRY
1708 /* Unref all plugins marked 'cached', to clear old plugins that no
1709 * longer exist. Returns %TRUE if any plugins were removed */
1710 static gboolean
1711 gst_registry_remove_cache_plugins (GstRegistry * registry)
1712 {
1713 GList *g;
1714 GList *g_next;
1715 GstPlugin *plugin;
1716 gboolean changed = FALSE;
1717
1718 g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
1719
1720 GST_OBJECT_LOCK (registry);
1721
1722 GST_DEBUG_OBJECT (registry, "removing cached plugins");
1723 g = registry->priv->plugins;
1724 while (g) {
1725 g_next = g->next;
1726 plugin = g->data;
1727 if (GST_OBJECT_FLAG_IS_SET (plugin, GST_PLUGIN_FLAG_CACHED)) {
1728 GST_DEBUG_OBJECT (registry, "removing cached plugin \"%s\"",
1729 GST_STR_NULL (plugin->filename));
1730 registry->priv->plugins = g_list_delete_link (registry->priv->plugins, g);
1731 if (G_LIKELY (plugin->basename))
1732 g_hash_table_remove (registry->priv->basename_hash, plugin->basename);
1733 gst_registry_remove_features_for_plugin_unlocked (registry, plugin);
1734 gst_object_unref (plugin);
1735 changed = TRUE;
1736 }
1737 g = g_next;
1738 }
1739
1740 GST_OBJECT_UNLOCK (registry);
1741
1742 return changed;
1743 }
1744
1745 typedef enum
1746 {
1747 REGISTRY_SCAN_AND_UPDATE_FAILURE = 0,
1748 REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED,
1749 REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED
1750 } GstRegistryScanAndUpdateResult;
1751
1752 /*
1753 * scan_and_update_registry:
1754 * @default_registry: the #GstRegistry
1755 * @registry_file: registry filename
1756 * @write_changes: write registry if it has changed?
1757 *
1758 * Scans for registry changes and eventually updates the registry cache.
1759 *
1760 * Return: %REGISTRY_SCAN_AND_UPDATE_FAILURE if the registry could not scanned
1761 * or updated, %REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED if the
1762 * registry is clean and %REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED if
1763 * it has been updated and the cache needs to be re-read.
1764 */
1765 static GstRegistryScanAndUpdateResult
1766 scan_and_update_registry (GstRegistry * default_registry,
1767 const gchar * registry_file, gboolean write_changes, GError ** error)
1768 {
1769 const gchar *plugin_path;
1770 gboolean changed = FALSE;
1771 GList *l;
1772 GstRegistryScanContext context;
1773
1774 GST_INFO ("Validating plugins from registry cache: %s", registry_file);
1775
1776 #ifdef GSTREAMER_LITE
1777 #ifdef G_OS_WIN32
1778 {
1779 HMODULE hmodule = NULL;
1780 char *dir = NULL;
1781 gchar *p = NULL;
1782 wchar_t wc_fn[MAX_PATH];
1783
1784 hmodule = GetModuleHandle(LIBGSTREAMER_LIB_NAME);
1785 if (hmodule)
1786 {
1787 if (GetModuleFileNameW(hmodule, wc_fn, MAX_PATH))
1788 {
1789 dir = g_utf16_to_utf8(wc_fn, -1, NULL, NULL, NULL);
1790 if (dir)
1791 {
1792 if ((p = strrchr (dir, G_DIR_SEPARATOR)) != NULL)
1793 *p = '\0';
1794
1795 changed |= gst_registry_scan_path (default_registry, dir);
1796
1797 g_free(dir);
1798 }
1799 }
1800 }
1801 }
1802 #elif defined(HAVE_OSX)
1803 {
1804 const void* pHeader = (void*) &_mh_dylib_header;
1805 const char* pImageName = 0;
1806 gchar* pBasePath = NULL;
1807 int iCount = _dyld_image_count();
1808 int i;
1809
1810 for(i = 1; i < iCount; i++)
1811 {
1812 if (((void*)_dyld_get_image_header(i)) == pHeader)
1813 pImageName = _dyld_get_image_name(i);//contains absolute path to dylib
1814 }
1815
1816 if (NULL != pImageName)
1817 {
1818 pBasePath = g_path_get_dirname((const gchar*) pImageName);
1819 changed |= gst_registry_scan_path (default_registry, pBasePath);
1820 }
1821 }
1822 #elif defined (LINUX)
1823 {
1824 // Get base path of Gstreamer-lite lib.
1825 gchar *base_path = NULL;
1826 if (dl_iterate_phdr (dl_callback, &base_path))
1827 {
1828 base_path = g_path_get_dirname((const gchar*) base_path);
1829 }
1830
1831 if (base_path != NULL)
1832 {
1833 changed |= gst_registry_scan_path (default_registry, base_path);
1834 }
1835 else
1836 {
1837 GST_ERROR ("Could not locate %s", LIBGSTREAMER_LIB_NAME);
1838 }
1839 }
1840 #else // other platforms ...
1841 {
1842 // Scan current path
1843 gchar *current_path = g_get_current_dir();
1844 if (current_path != NULL)
1845 {
1846 changed |= gst_registry_scan_path (default_registry, current_path);
1847 g_free(current_path);
1848 }
1849 else
1850 {
1851 GST_ERROR ("g_get_current_dir() returned NULL");
1852 }
1853 }
1854 #endif // other platforms
1855 #endif // GSTREAMER_LITE
1856
1857 init_scan_context (&context, default_registry);
1858
1859 /* It sounds tempting to just compare the mtime of directories with the mtime
1860 * of the registry cache, but it does not work. It would not catch updated
1861 * plugins, which might bring more or less features.
1862 */
1863
1864 /* scan paths specified via --gst-plugin-path */
1865 GST_DEBUG ("scanning paths added via --gst-plugin-path");
1866 for (l = _priv_gst_plugin_paths; l != NULL; l = l->next) {
1867 GST_INFO ("Scanning plugin path: \"%s\"", (gchar *) l->data);
1868 changed |= gst_registry_scan_path_internal (&context, (gchar *) l->data);
1869 }
1870 /* keep plugin_paths around in case a re-scan is forced later on */
1871
1872 /* GST_PLUGIN_PATH specifies a list of directories to scan for
1873 * additional plugins. These take precedence over the system plugins */
1874 plugin_path = g_getenv ("GST_PLUGIN_PATH_1_0");
1875 if (plugin_path == NULL)
1876 plugin_path = g_getenv ("GST_PLUGIN_PATH");
1877 if (plugin_path) {
1878 char **list;
1879 int i;
1880
1881 GST_DEBUG ("GST_PLUGIN_PATH set to %s", plugin_path);
1882 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
1883 for (i = 0; list[i]; i++) {
1884 changed |= gst_registry_scan_path_internal (&context, list[i]);
1885 }
1886 g_strfreev (list);
1887 } else {
1888 GST_DEBUG ("GST_PLUGIN_PATH not set");
1889 }
1890
1891 /* GST_PLUGIN_SYSTEM_PATH specifies a list of plugins that are always
1892 * loaded by default. If not set, this defaults to the system-installed
1893 * path, and the plugins installed in the user's home directory */
1894 plugin_path = g_getenv ("GST_PLUGIN_SYSTEM_PATH_1_0");
1895 if (plugin_path == NULL)
1896 plugin_path = g_getenv ("GST_PLUGIN_SYSTEM_PATH");
1897 if (plugin_path == NULL) {
1898 char *home_plugins;
1899
1900 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH not set");
1901
1902 /* plugins in the user's home directory take precedence over
1903 * system-installed ones */
1904 home_plugins = g_build_filename (g_get_user_data_dir (),
1905 "gstreamer-" GST_API_VERSION, "plugins", NULL);
1906
1907 GST_DEBUG ("scanning home plugins %s", home_plugins);
1908 changed |= gst_registry_scan_path_internal (&context, home_plugins);
1909 g_free (home_plugins);
1910
1911 /* add the main (installed) library path */
1912
1913 #ifdef G_OS_WIN32
1914 {
1915 char *base_dir;
1916 char *dir;
1917
1918 base_dir =
1919 g_win32_get_package_installation_directory_of_module
1920 (_priv_gst_dll_handle);
1921
1922 dir = g_build_filename (base_dir,
1923 #ifdef _DEBUG
1924 "debug"
1925 #endif
1926 "lib", "gstreamer-" GST_API_VERSION, NULL);
1927 GST_DEBUG ("scanning DLL dir %s", dir);
1928
1929 changed |= gst_registry_scan_path_internal (&context, dir);
1930
1931 g_free (dir);
1932 g_free (base_dir);
1933 }
1934 #else
1935 GST_DEBUG ("scanning main plugins %s", PLUGINDIR);
1936 changed |= gst_registry_scan_path_internal (&context, PLUGINDIR);
1937 #endif
1938 } else {
1939 gchar **list;
1940 gint i;
1941
1942 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path);
1943 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
1944 for (i = 0; list[i]; i++) {
1945 changed |= gst_registry_scan_path_internal (&context, list[i]);
1946 }
1947 g_strfreev (list);
1948 }
1949
1950 clear_scan_context (&context);
1951 changed |= context.changed;
1952
1953 /* Remove cached plugins so stale info is cleared. */
1954 changed |= gst_registry_remove_cache_plugins (default_registry);
1955
1956 if (!changed) {
1957 GST_INFO ("Registry cache has not changed");
1958 return REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED;
1959 }
1960
1961 if (!write_changes) {
1962 GST_INFO ("Registry cache changed, but writing is disabled. Not writing.");
1963 return REGISTRY_SCAN_AND_UPDATE_FAILURE;
1964 }
1965
1966 #ifndef GSTREAMER_LITE
1967 GST_INFO ("Registry cache changed. Writing new registry cache");
1968 if (!priv_gst_registry_binary_write_cache (default_registry,
1969 default_registry->priv->plugins, registry_file)) {
1970 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
1971 _("Error writing registry cache to %s: %s"),
1972 registry_file, g_strerror (errno));
1973 return REGISTRY_SCAN_AND_UPDATE_FAILURE;
1974 }
1975 #endif // GSTREAMER_LITE
1976
1977 GST_INFO ("Registry cache written successfully");
1978 return REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED;
1979 }
1980
1981 static gboolean
1982 ensure_current_registry (GError ** error)
1983 {
1984 gchar *registry_file;
1985 GstRegistry *default_registry;
1986 gboolean ret = TRUE;
1987 gboolean do_update = TRUE;
1988 gboolean have_cache = TRUE;
1989
1990 default_registry = gst_registry_get ();
1991
1992 registry_file = g_strdup (g_getenv ("GST_REGISTRY_1_0"));
1993 if (registry_file == NULL)
1994 registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
1995 if (registry_file == NULL) {
1996 registry_file = g_build_filename (g_get_user_cache_dir (),
1997 "gstreamer-" GST_API_VERSION, "registry." TARGET_CPU ".bin", NULL);
1998 }
1999
2000 if (!_gst_disable_registry_cache) {
2001 GST_INFO ("reading registry cache: %s", registry_file);
2002 #ifndef GSTREAMER_LITE
2003 have_cache = priv_gst_registry_binary_read_cache (default_registry,
2004 registry_file);
2005 #else // GSTREAMER_LITE
2006 have_cache = FALSE;
2007 #endif // GSTREAMER_LITE
2008 /* Only ever read the registry cache once, then disable it for
2009 * subsequent updates during the program lifetime */
2010 _gst_disable_registry_cache = TRUE;
2011 }
2012
2013 if (have_cache) {
2014 do_update = !_priv_gst_disable_registry_update;
2015 if (do_update) {
2016 const gchar *update_env;
2017
2018 if ((update_env = g_getenv ("GST_REGISTRY_UPDATE"))) {
2019 /* do update for any value different from "no" */
2020 do_update = (strcmp (update_env, "no") != 0);
2021 }
2022 }
2023 }
2024
2025 if (do_update) {
2026 const gchar *reuse_env;
2027
2028 if ((reuse_env = g_getenv ("GST_REGISTRY_REUSE_PLUGIN_SCANNER"))) {
2029 /* do reuse for any value different from "no" */
2030 __registry_reuse_plugin_scanner = (strcmp (reuse_env, "no") != 0);
2031 }
2032 /* now check registry */
2033 GST_DEBUG ("Updating registry cache");
2034 scan_and_update_registry (default_registry, registry_file, TRUE, error);
2035 } else {
2036 GST_DEBUG ("Not updating registry cache (disabled)");
2037 }
2038
2039 g_free (registry_file);
2040 GST_INFO ("registry reading and updating done, result = %d", ret);
2041
2042 return ret;
2043 }
2044 #endif /* GST_DISABLE_REGISTRY */
2045
2046 /**
2047 * gst_registry_fork_is_enabled:
2048 *
2049 * By default GStreamer will perform scanning and rebuilding of the
2050 * registry file using a helper child process.
2051 *
2052 * Applications might want to disable this behaviour with the
2053 * gst_registry_fork_set_enabled() function, in which case new plugins
2054 * are scanned (and loaded) into the application process.
2055 *
2056 * Returns: %TRUE if GStreamer will use the child helper process when
2057 * rebuilding the registry.
2058 */
2059 gboolean
2060 gst_registry_fork_is_enabled (void)
2061 {
2062 return _gst_enable_registry_fork;
2063 }
2064
2065 /**
2066 * gst_registry_fork_set_enabled:
2067 * @enabled: whether rebuilding the registry can use a temporary child helper process.
2068 *
2069 * Applications might want to disable/enable spawning of a child helper process
2070 * when rebuilding the registry. See gst_registry_fork_is_enabled() for more
2071 * information.
2072 */
2073 void
2074 gst_registry_fork_set_enabled (gboolean enabled)
2075 {
2076 _gst_enable_registry_fork = enabled;
2077 }
2078
2079 /**
2080 * gst_update_registry:
2081 *
2082 * Forces GStreamer to re-scan its plugin paths and update the default
2083 * plugin registry.
2084 *
2085 * Applications will almost never need to call this function, it is only
2086 * useful if the application knows new plugins have been installed (or old
2087 * ones removed) since the start of the application (or, to be precise, the
2088 * first call to gst_init()) and the application wants to make use of any
2089 * newly-installed plugins without restarting the application.
2090 *
2091 * Applications should assume that the registry update is neither atomic nor
2092 * thread-safe and should therefore not have any dynamic pipelines running
2093 * (including the playbin and decodebin elements) and should also not create
2094 * any elements or access the GStreamer registry while the update is in
2095 * progress.
2096 *
2097 * Note that this function may block for a significant amount of time.
2098 *
2099 * Returns: %TRUE if the registry has been updated successfully (does not
2100 * imply that there were changes), otherwise %FALSE.
2101 */
2102 gboolean
2103 gst_update_registry (void)
2104 {
2105 gboolean res;
2106
2107 #ifndef GST_DISABLE_REGISTRY
2108 GError *err = NULL;
2109
2110 res = ensure_current_registry (&err);
2111 if (err) {
2112 GST_WARNING ("registry update failed: %s", err->message);
2113 g_error_free (err);
2114 } else {
2115 GST_LOG ("registry update succeeded");
2116 }
2117
2118 #else
2119 GST_WARNING ("registry update failed: %s", "registry disabled");
2120 res = TRUE;
2121 #endif /* GST_DISABLE_REGISTRY */
2122
2123 if (_priv_gst_preload_plugins) {
2124 GST_DEBUG ("Preloading indicated plugins...");
2125 g_slist_foreach (_priv_gst_preload_plugins, load_plugin_func, NULL);
2126 }
2127
2128 return res;
2129 }
2130
2131 /**
2132 * gst_registry_get_feature_list_cookie:
2133 * @registry: the registry
2134 *
2135 * Returns the registry's feature list cookie. This changes
2136 * every time a feature is added or removed from the registry.
2137 *
2138 * Returns: the feature list cookie.
2139 */
2140 guint32
2141 gst_registry_get_feature_list_cookie (GstRegistry * registry)
2142 {
2143 g_return_val_if_fail (GST_IS_REGISTRY (registry), 0);
2144
2145 return registry->priv->cookie;
2146 }