2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
5 * gst.c: Initialization and non-pipeline operations
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.
26 * @short_description: Media library supporting arbitrary formats and filter
29 * GStreamer is a framework for constructing graphs of various filters
30 * (termed elements here) that will handle streaming media.
32 * Any discrete (packetizable) media type is supported, with provisions for
33 * automatically determining source type.
35 * Formatting/framing information is provided with a powerful negotiation
38 * Plugins are heavily used to provide for all elements, allowing one to
39 * construct plugins outside of the GST library, even released binary-only if
40 * license require (please don't).
42 * GStreamer covers a wide range of use cases including: playback, recording,
43 * editing, serving streams, voice over ip and video calls.
45 * The `GStreamer` library should be initialized with
46 * gst_init() before it can be used. You should pass pointers to the main `argc`
47 * and `argv` variables so that GStreamer can process its own command line
48 * options, as shown in the following example.
50 * ## Initializing the gstreamer library
53 * int main (int argc, char *argv[])
55 * // initialize the GStreamer library
56 * gst_init (&argc, &argv);
61 * It's allowed to pass two %NULL pointers to gst_init() in case you don't want
62 * to pass the command line args to GStreamer.
64 * You can also use #GOptionContext to initialize your own parameters as shown in
65 * the next code fragment:
67 * ## Initializing own parameters when initializing GStreamer
70 * static gboolean stats = FALSE;
73 * main (int argc, char *argv[])
75 * GOptionEntry options[] = {
76 * {"tags", 't', 0, G_OPTION_ARG_NONE, &tags,
77 * N_("Output tags (also known as metadata)"), NULL},
80 * ctx = g_option_context_new ("[ADDITIONAL ARGUMENTS]");
81 * g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
82 * g_option_context_add_group (ctx, gst_init_get_option_group ());
83 * if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
84 * g_print ("Error initializing: %s\n", GST_STR_NULL (err->message));
87 * g_option_context_free (ctx);
92 * Use gst_version() to query the library version at runtime or use the
93 * GST_VERSION_* macros to find the version at compile time. Optionally
94 * gst_version_string() returns a printable string.
96 * The gst_deinit() call is used to clean up all internal resources used
97 * by GStreamer. It is mostly used in unit tests to check for leaks.
100 #include "gst_private.h"
101 #include "gstconfig.h"
104 #include <sys/types.h>
105 #ifdef HAVE_SYS_UTSNAME_H
106 #include <sys/utsname.h>
112 #define WIN32_LEAN_AND_MEAN /* prevents from including too many things */
113 #include <windows.h> /* GetStdHandle, windows console */
115 #if defined (__APPLE__)
116 #include "TargetConditionals.h"
117 #if !TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR && !TARGET_OS_EMBEDDED
118 #include <libproc.h> /* proc_pidpath, PROC_PIDPATHINFO_MAXSIZE */
122 #include <glib/gi18n-lib.h>
123 #include <locale.h> /* for LC_ALL */
127 #define GST_CAT_DEFAULT GST_CAT_GST_INIT
129 #define MAX_PATH_SPLIT 16
130 #define GST_PLUGIN_SEPARATOR ","
132 static gboolean gst_initialized = FALSE;
133 static gboolean gst_deinitialized = FALSE;
134 static GMutex init_lock;
136 GstClockTime _priv_gst_start_time;
139 HMODULE _priv_gst_dll_handle = NULL;
142 #ifndef GST_DISABLE_REGISTRY
143 GList *_priv_gst_plugin_paths = NULL; /* for delayed processing in init_post */
145 extern gboolean _priv_gst_disable_registry;
146 extern gboolean _priv_gst_disable_registry_update;
149 gchar *_gst_executable_path = NULL;
151 #ifndef GST_DISABLE_GST_DEBUG
152 const gchar *priv_gst_dump_dot_dir;
157 /* set to TRUE when segfaults need to be left as is */
158 static gboolean _gst_disable_segtrap = FALSE;
160 static gboolean init_pre (GOptionContext * context, GOptionGroup * group,
161 gpointer data, GError ** error);
162 static gboolean init_post (GOptionContext * context, GOptionGroup * group,
163 gpointer data, GError ** error);
164 #ifndef GST_DISABLE_OPTION_PARSING
165 static gboolean parse_goption_arg (const gchar * s_opt,
166 const gchar * arg, gpointer data, GError ** err);
169 GSList *_priv_gst_preload_plugins = NULL;
175 #ifndef GST_DISABLE_GST_DEBUG
180 ARG_DEBUG_COLOR_MODE,
187 ARG_REGISTRY_UPDATE_DISABLE,
188 ARG_REGISTRY_FORK_DISABLE
191 /* debug-spec ::= category-spec [, category-spec]*
192 * category-spec ::= category:val | val
198 /* Note: DllMain is only called when DLLs are loaded or unloaded, so this will
199 * never be called if libgstreamer-1.0 is linked statically. Do not add any code
200 * here to, say, initialize variables or set things up since that will only
201 * happen for dynamically-built GStreamer.
203 * Also, ideally this should not be defined when GStreamer is built statically.
204 * i.e., it should be conditional on #ifdef DLL_EXPORT. It will be ignored, but
205 * if other libraries make the same mistake of defining it when building
206 * statically, there will be a symbol collision during linking. Fixing this
207 * requires one to build two object files: one for static linking and another
208 * for dynamic linking. */
209 BOOL WINAPI DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
211 DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
213 if (fdwReason == DLL_PROCESS_ATTACH)
214 _priv_gst_dll_handle = (HMODULE) hinstDLL;
221 * gst_init_get_option_group: (skip)
223 * Returns a #GOptionGroup with GStreamer's argument specifications. The
224 * group is set up to use standard GOption callbacks, so when using this
225 * group in combination with GOption parsing methods, all argument parsing
226 * and initialization is automated.
228 * This function is useful if you want to integrate GStreamer with other
229 * libraries that use GOption (see g_option_context_add_group() ).
231 * If you use this function, you should make sure you initialise the GLib
232 * threading system as one of the very first things in your program
233 * (see the example at the beginning of this section).
235 * Returns: (transfer full) (nullable): a pointer to GStreamer's option group.
239 gst_init_get_option_group (void)
241 #ifndef GST_DISABLE_OPTION_PARSING
243 static const GOptionEntry gst_args[] = {
244 {"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
245 (gpointer) parse_goption_arg, N_("Print the GStreamer version"), NULL},
246 {"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
247 (gpointer) parse_goption_arg, N_("Make all warnings fatal"), NULL},
248 #ifndef GST_DISABLE_GST_DEBUG
249 {"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
250 (gpointer) parse_goption_arg,
251 N_("Print available debug categories and exit"),
253 {"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK,
254 (gpointer) parse_goption_arg,
255 N_("Default debug level from 1 (only error) to 9 (anything) or "
258 {"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) parse_goption_arg,
259 N_("Comma-separated list of category_name:level pairs to set "
260 "specific levels for the individual categories. Example: "
261 "GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
263 {"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
264 (gpointer) parse_goption_arg, N_("Disable colored debugging output"),
266 {"gst-debug-color-mode", 0, 0, G_OPTION_ARG_CALLBACK,
267 (gpointer) parse_goption_arg,
268 N_("Changes coloring mode of the debug log. "
269 "Possible modes: off, on, disable, auto, unix"),
271 {"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
272 (gpointer) parse_goption_arg, N_("Disable debugging"), NULL},
274 {"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
275 (gpointer) parse_goption_arg,
276 N_("Enable verbose plugin loading diagnostics"),
278 {"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK,
279 (gpointer) parse_goption_arg,
280 N_("Colon-separated paths containing plugins"), N_("PATHS")},
281 {"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK,
282 (gpointer) parse_goption_arg,
283 N_("Comma-separated list of plugins to preload in addition to the "
284 "list stored in environment variable GST_PLUGIN_PATH"),
286 {"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
287 (gpointer) parse_goption_arg,
288 N_("Disable trapping of segmentation faults during plugin loading"),
290 {"gst-disable-registry-update", 0, G_OPTION_FLAG_NO_ARG,
291 G_OPTION_ARG_CALLBACK,
292 (gpointer) parse_goption_arg,
293 N_("Disable updating the registry"),
295 {"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
296 G_OPTION_ARG_CALLBACK,
297 (gpointer) parse_goption_arg,
298 N_("Disable spawning a helper process while scanning the registry"),
303 group = g_option_group_new ("gst", _("GStreamer Options"),
304 _("Show GStreamer Options"), NULL, NULL);
305 g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
306 (GOptionParseFunc) init_post);
308 g_option_group_add_entries (group, gst_args);
309 g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
317 #if defined(__linux__)
319 find_executable_path (void)
321 GError *error = NULL;
323 if (_gst_executable_path)
326 _gst_executable_path = g_file_read_link ("/proc/self/exe", &error);
328 g_error_free (error);
330 #elif defined(G_OS_WIN32)
332 find_executable_path (void)
334 char buffer[MAX_PATH];
336 if (!GetModuleFileName (NULL, buffer, MAX_PATH))
339 _gst_executable_path = g_strdup (buffer);
341 #elif defined(__APPLE__) && !TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR && !TARGET_OS_EMBEDDED
343 find_executable_path (void)
347 char pathbuf[PROC_PIDPATHINFO_MAXSIZE];
350 ret = proc_pidpath (pid, pathbuf, sizeof (pathbuf));
352 _gst_executable_path = g_strdup (pathbuf);
356 find_executable_path (void)
358 GST_FIXME ("Couldn't look up executable path, add support for this platform");
363 * gst_get_main_executable_path:
365 * This helper is mostly helpful for plugins that need to
366 * inspect the folder of the main executable to determine
367 * their set of features.
369 * When a plugin is initialized from the gst-plugin-scanner
370 * external process, the returned path will be the same as from the
373 * Returns: (transfer none) (nullable): The path of the executable that
374 * initialized GStreamer, or %NULL if it could not be determined.
379 gst_get_main_executable_path (void)
381 return _gst_executable_path;
386 * @argc: (inout) (allow-none): pointer to application's argc
387 * @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
388 * @error: pointer to a #GError to which a message will be posted on error
390 * Initializes the GStreamer library, setting up internal path lists,
391 * registering built-in elements, and loading standard plugins.
393 * This function will return %FALSE if GStreamer could not be initialized
394 * for some reason. If you want your program to fail fatally,
395 * use gst_init() instead.
397 * Returns: %TRUE if GStreamer could be initialized.
400 gst_init_check (int *argc, char **argv[], GError ** error)
402 #ifndef GST_DISABLE_OPTION_PARSING
408 g_mutex_lock (&init_lock);
410 if (gst_initialized) {
411 GST_DEBUG ("already initialized gst");
412 g_mutex_unlock (&init_lock);
415 #ifndef GST_DISABLE_OPTION_PARSING
416 ctx = g_option_context_new ("- GStreamer initialization");
417 g_option_context_set_ignore_unknown_options (ctx, TRUE);
418 g_option_context_set_help_enabled (ctx, FALSE);
419 group = gst_init_get_option_group ();
420 g_option_context_add_group (ctx, group);
421 res = g_option_context_parse (ctx, argc, argv, error);
422 g_option_context_free (ctx);
424 init_pre (NULL, NULL, NULL, NULL);
425 init_post (NULL, NULL, NULL, NULL);
429 gst_initialized = res;
431 g_mutex_unlock (&init_lock);
438 * @argc: (inout) (allow-none): pointer to application's argc
439 * @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
441 * Initializes the GStreamer library, setting up internal path lists,
442 * registering built-in elements, and loading standard plugins.
444 * Unless the plugin registry is disabled at compile time, the registry will be
445 * loaded. By default this will also check if the registry cache needs to be
446 * updated and rescan all plugins if needed. See gst_update_registry() for
447 * details and section
448 * <link linkend="gst-running">Running GStreamer Applications</link>
449 * for how to disable automatic registry updates.
451 * WARNING: This function will terminate your program if it was unable to
452 * initialize GStreamer for some reason. If you want your program to fall back,
453 * use gst_init_check() instead.
455 * WARNING: This function does not work in the same way as corresponding
456 * functions in other glib-style libraries, such as gtk_init\(\). In
457 * particular, unknown command line options cause this function to
458 * abort program execution.
461 gst_init (int *argc, char **argv[])
465 if (!gst_init_check (argc, argv, &err)) {
466 g_print ("Could not initialize GStreamer: %s\n",
467 err ? err->message : "unknown error occurred");
476 * gst_is_initialized:
478 * Use this function to check if GStreamer has been initialized with gst_init()
479 * or gst_init_check().
481 * Returns: %TRUE if initialization has been done, %FALSE otherwise.
484 gst_is_initialized (void)
486 return gst_initialized;
489 #ifndef GST_DISABLE_OPTION_PARSING
490 # ifndef GST_DISABLE_REGISTRY
492 add_path_func (gpointer data, gpointer user_data)
494 GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
495 _priv_gst_plugin_paths =
496 g_list_append (_priv_gst_plugin_paths, g_strdup (data));
501 #ifndef GST_DISABLE_OPTION_PARSING
503 prepare_for_load_plugin_func (gpointer data, gpointer user_data)
505 _priv_gst_preload_plugins =
506 g_slist_prepend (_priv_gst_preload_plugins, g_strdup (data));
510 #ifndef GST_DISABLE_OPTION_PARSING
512 split_and_iterate (const gchar * stringlist, const gchar * separator,
513 GFunc iterator, gpointer user_data)
517 gchar *lastlist = g_strdup (stringlist);
520 strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
525 iterator (strings[j], user_data);
526 if (++j == MAX_PATH_SPLIT) {
527 lastlist = g_strdup (strings[j]);
532 g_strfreev (strings);
537 /* we have no fail cases yet, but maybe in the future */
539 init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
543 if (gst_initialized) {
544 GST_DEBUG ("already initialized");
548 find_executable_path ();
550 _priv_gst_start_time = gst_util_get_timestamp ();
552 #ifndef GST_DISABLE_GST_DEBUG
553 _priv_gst_debug_init ();
554 priv_gst_dump_dot_dir = g_getenv ("GST_DEBUG_DUMP_DOT_DIR");
558 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
559 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
560 #endif /* ENABLE_NLS */
562 /* This is the earliest we can make stuff show up in the logs.
563 * So give some useful info about GStreamer here */
567 g_win32_get_package_installation_directory_of_module
568 (_priv_gst_dll_handle);
570 libdir = g_build_filename (basedir,
578 libdir = priv_gst_get_relocated_libgstreamer ();
580 libdir = g_strdup (LIBDIR);
582 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
583 GST_INFO ("Using library installed in %s", libdir);
586 #ifndef GST_DISABLE_REGISTRY
588 const gchar *disable_registry;
589 if ((disable_registry = g_getenv ("GST_REGISTRY_DISABLE"))) {
590 _priv_gst_disable_registry = (strcmp (disable_registry, "yes") == 0);
595 /* Print some basic system details if possible (OS/architecture) */
596 #ifdef HAVE_SYS_UTSNAME_H
598 struct utsname sys_details;
600 if (uname (&sys_details) == 0) {
601 GST_INFO ("%s %s %s %s %s", sys_details.sysname,
602 sys_details.nodename, sys_details.release, sys_details.version,
603 sys_details.machine);
608 #ifndef G_ATOMIC_LOCK_FREE
609 GST_CAT_WARNING (GST_CAT_PERFORMANCE, "GLib atomic operations are NOT "
610 "implemented using real hardware atomic operations!");
617 gst_register_core_elements (GstPlugin * plugin)
619 /* register some standard builtin types */
620 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
622 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
625 g_assert_not_reached ();
631 init_static_plugins (void)
635 /* Call gst_init_static_plugins() defined in libgstreamer-full-1.0 in the case
636 * libgstreamer is static linked with some plugins. */
637 module = g_module_open (NULL, G_MODULE_BIND_LOCAL);
640 if (g_module_symbol (module, "gst_init_static_plugins",
641 (gpointer *) & func)) {
644 g_module_close (module);
650 * - initialization of threads if we use them
653 * - initializes gst_format
654 * - registers a bunch of types for gst_objects
656 * - we don't have cases yet where this fails, but in the future
657 * we might and then it's nice to be able to return that
660 init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
663 if (gst_initialized) {
664 GST_DEBUG ("already initialized");
668 _priv_gst_mini_object_initialize ();
669 _priv_gst_quarks_initialize ();
670 _priv_gst_allocator_initialize ();
671 _priv_gst_memory_initialize ();
672 _priv_gst_format_initialize ();
673 _priv_gst_query_initialize ();
674 _priv_gst_structure_initialize ();
675 _priv_gst_caps_initialize ();
676 _priv_gst_caps_features_initialize ();
677 _priv_gst_meta_initialize ();
678 _priv_gst_message_initialize ();
680 g_type_class_ref (gst_object_get_type ());
681 g_type_class_ref (gst_pad_get_type ());
682 g_type_class_ref (gst_element_factory_get_type ());
683 g_type_class_ref (gst_element_get_type ());
684 g_type_class_ref (gst_tracer_factory_get_type ());
685 g_type_class_ref (gst_type_find_factory_get_type ());
686 g_type_class_ref (gst_bin_get_type ());
687 g_type_class_ref (gst_bus_get_type ());
688 g_type_class_ref (gst_task_get_type ());
689 g_type_class_ref (gst_clock_get_type ());
690 g_type_class_ref (gst_debug_color_mode_get_type ());
692 gst_uri_handler_get_type ();
694 g_type_class_ref (gst_object_flags_get_type ());
695 g_type_class_ref (gst_bin_flags_get_type ());
696 g_type_class_ref (gst_buffer_flags_get_type ());
697 g_type_class_ref (gst_buffer_copy_flags_get_type ());
698 g_type_class_ref (gst_bus_flags_get_type ());
699 g_type_class_ref (gst_bus_sync_reply_get_type ());
700 g_type_class_ref (gst_caps_flags_get_type ());
701 g_type_class_ref (gst_clock_return_get_type ());
702 g_type_class_ref (gst_clock_entry_type_get_type ());
703 g_type_class_ref (gst_clock_flags_get_type ());
704 g_type_class_ref (gst_clock_type_get_type ());
705 g_type_class_ref (gst_debug_graph_details_get_type ());
706 g_type_class_ref (gst_state_get_type ());
707 g_type_class_ref (gst_state_change_return_get_type ());
708 g_type_class_ref (gst_state_change_get_type ());
709 g_type_class_ref (gst_element_flags_get_type ());
710 g_type_class_ref (gst_tracer_value_scope_get_type ());
711 g_type_class_ref (gst_tracer_value_flags_get_type ());
712 g_type_class_ref (gst_core_error_get_type ());
713 g_type_class_ref (gst_library_error_get_type ());
714 g_type_class_ref (gst_resource_error_get_type ());
715 g_type_class_ref (gst_stream_error_get_type ());
716 g_type_class_ref (gst_event_type_flags_get_type ());
717 g_type_class_ref (gst_event_type_get_type ());
718 g_type_class_ref (gst_seek_type_get_type ());
719 g_type_class_ref (gst_seek_flags_get_type ());
720 g_type_class_ref (gst_qos_type_get_type ());
721 g_type_class_ref (gst_format_get_type ());
722 g_type_class_ref (gst_debug_level_get_type ());
723 g_type_class_ref (gst_debug_color_flags_get_type ());
724 g_type_class_ref (gst_iterator_result_get_type ());
725 g_type_class_ref (gst_iterator_item_get_type ());
726 g_type_class_ref (gst_message_type_get_type ());
727 g_type_class_ref (gst_mini_object_flags_get_type ());
728 g_type_class_ref (gst_pad_link_return_get_type ());
729 g_type_class_ref (gst_pad_link_check_get_type ());
730 g_type_class_ref (gst_flow_return_get_type ());
731 g_type_class_ref (gst_pad_mode_get_type ());
732 g_type_class_ref (gst_pad_direction_get_type ());
733 g_type_class_ref (gst_pad_flags_get_type ());
734 g_type_class_ref (gst_pad_presence_get_type ());
735 g_type_class_ref (gst_pad_template_flags_get_type ());
736 g_type_class_ref (gst_pipeline_flags_get_type ());
737 g_type_class_ref (gst_plugin_error_get_type ());
738 g_type_class_ref (gst_plugin_flags_get_type ());
739 g_type_class_ref (gst_plugin_dependency_flags_get_type ());
740 g_type_class_ref (gst_rank_get_type ());
741 g_type_class_ref (gst_query_type_flags_get_type ());
742 g_type_class_ref (gst_query_type_get_type ());
743 g_type_class_ref (gst_buffering_mode_get_type ());
744 g_type_class_ref (gst_stream_status_type_get_type ());
745 g_type_class_ref (gst_structure_change_type_get_type ());
746 g_type_class_ref (gst_tag_merge_mode_get_type ());
747 g_type_class_ref (gst_tag_flag_get_type ());
748 g_type_class_ref (gst_tag_scope_get_type ());
749 g_type_class_ref (gst_task_pool_get_type ());
750 g_type_class_ref (gst_task_state_get_type ());
751 g_type_class_ref (gst_toc_entry_type_get_type ());
752 g_type_class_ref (gst_type_find_probability_get_type ());
753 g_type_class_ref (gst_uri_error_get_type ());
754 g_type_class_ref (gst_uri_type_get_type ());
755 g_type_class_ref (gst_parse_error_get_type ());
756 g_type_class_ref (gst_parse_flags_get_type ());
757 g_type_class_ref (gst_search_mode_get_type ());
758 g_type_class_ref (gst_progress_type_get_type ());
759 g_type_class_ref (gst_buffer_pool_acquire_flags_get_type ());
760 g_type_class_ref (gst_memory_flags_get_type ());
761 g_type_class_ref (gst_map_flags_get_type ());
762 g_type_class_ref (gst_caps_intersect_mode_get_type ());
763 g_type_class_ref (gst_pad_probe_type_get_type ());
764 g_type_class_ref (gst_pad_probe_return_get_type ());
765 g_type_class_ref (gst_segment_flags_get_type ());
766 g_type_class_ref (gst_scheduling_flags_get_type ());
767 g_type_class_ref (gst_meta_flags_get_type ());
768 g_type_class_ref (gst_toc_entry_type_get_type ());
769 g_type_class_ref (gst_toc_scope_get_type ());
770 g_type_class_ref (gst_toc_loop_type_get_type ());
771 g_type_class_ref (gst_control_binding_get_type ());
772 g_type_class_ref (gst_control_source_get_type ());
773 g_type_class_ref (gst_lock_flags_get_type ());
774 g_type_class_ref (gst_allocator_flags_get_type ());
775 g_type_class_ref (gst_stream_flags_get_type ());
776 g_type_class_ref (gst_stream_type_get_type ());
777 g_type_class_ref (gst_stack_trace_flags_get_type ());
778 g_type_class_ref (gst_promise_result_get_type ());
780 _priv_gst_event_initialize ();
781 _priv_gst_buffer_initialize ();
782 _priv_gst_buffer_list_initialize ();
783 _priv_gst_sample_initialize ();
784 _priv_gst_context_initialize ();
785 _priv_gst_date_time_initialize ();
786 _priv_gst_value_initialize ();
787 _priv_gst_tag_initialize ();
788 _priv_gst_toc_initialize ();
790 g_type_class_ref (gst_param_spec_fraction_get_type ());
791 gst_parse_context_get_type ();
793 _priv_gst_plugin_initialize ();
795 /* register core plugins */
796 gst_plugin_register_static (GST_VERSION_MAJOR, GST_VERSION_MINOR,
797 "staticelements", "core elements linked into the GStreamer library",
798 gst_register_core_elements, VERSION, GST_LICENSE, PACKAGE,
799 GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
801 init_static_plugins ();
804 * Any errors happening below this point are non-fatal, we therefore mark
805 * gstreamer as being initialized, since it is the case from a plugin point of
808 * If anything fails, it will be put back to %FALSE in gst_init_check().
809 * This allows some special plugins that would call gst_init() to not cause a
810 * looping effect (i.e. initializing GStreamer twice).
812 gst_initialized = TRUE;
814 if (!gst_update_registry ())
817 GST_INFO ("GLib runtime version: %d.%d.%d", glib_major_version,
818 glib_minor_version, glib_micro_version);
819 GST_INFO ("GLib headers version: %d.%d.%d", GLIB_MAJOR_VERSION,
820 GLIB_MINOR_VERSION, GLIB_MICRO_VERSION);
821 GST_INFO ("initialized GStreamer successfully");
823 /* Adjust initial plugin rank based on the GST_PLUGIN_FEATURE_RANK
824 * environment variable */
825 _priv_gst_plugin_feature_rank_initialize ();
827 #ifndef GST_DISABLE_GST_DEBUG
828 _priv_gst_tracing_init ();
834 #ifndef GST_DISABLE_OPTION_PARSING
835 # ifndef GST_DISABLE_GST_DEBUG
837 select_all (GstPlugin * plugin, gpointer user_data)
843 sort_by_category_name (gconstpointer a, gconstpointer b)
845 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
846 gst_debug_category_get_name ((GstDebugCategory *) b));
850 gst_debug_help (void)
855 /* Need to ensure the registry is loaded to get debug categories */
856 if (!init_post (NULL, NULL, NULL, NULL))
859 list2 = gst_registry_plugin_filter (gst_registry_get (),
860 select_all, FALSE, NULL);
862 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
863 for (g = list2; g; g = g_list_next (g)) {
864 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
865 GList *features, *orig_features;
867 if (GST_OBJECT_FLAG_IS_SET (plugin, GST_PLUGIN_FLAG_BLACKLISTED))
870 gst_plugin_load (plugin);
871 /* Now create one of each feature so the class_init functions
872 * are called, as that's where most debug categories are
873 * registered. FIXME: If debug categories were a plugin feature,
874 * this would be unneeded */
875 orig_features = features =
876 gst_registry_get_feature_list_by_plugin (gst_registry_get (),
877 gst_plugin_get_name (plugin));
879 GstPluginFeature *feature;
881 if (G_UNLIKELY (features->data == NULL))
884 feature = GST_PLUGIN_FEATURE (features->data);
885 if (GST_IS_ELEMENT_FACTORY (feature)) {
886 GstElementFactory *factory;
889 factory = GST_ELEMENT_FACTORY (feature);
890 e = gst_element_factory_create (factory, NULL);
892 gst_object_unref (e);
896 features = g_list_next (features);
899 gst_plugin_feature_list_free (orig_features);
903 list = gst_debug_get_all_categories ();
904 walk = list = g_slist_sort (list, sort_by_category_name);
907 g_print ("name level description\n");
908 g_print ("---------------------+--------+--------------------------------\n");
912 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
913 GstDebugColorMode coloring = gst_debug_get_color_mode ();
920 if (GST_DEBUG_COLOR_MODE_UNIX == coloring
921 || (on_unix && GST_DEBUG_COLOR_MODE_ON == coloring)) {
922 gchar *color = gst_debug_construct_term_color (cat->color);
924 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
926 gst_debug_category_get_name (cat),
927 gst_debug_category_get_threshold (cat),
928 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
929 color, gst_debug_category_get_description (cat));
931 } else if (GST_DEBUG_COLOR_MODE_ON == coloring && !on_unix) {
933 gint color = gst_debug_construct_win_color (cat->color);
934 const gint clear = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
936 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
937 g_print ("%-20s", gst_debug_category_get_name (cat));
938 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
939 g_print (" %1d %s ", gst_debug_category_get_threshold (cat),
940 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)));
941 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
942 g_print ("%s", gst_debug_category_get_description (cat));
943 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
945 #endif /* G_OS_WIN32 */
947 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
948 gst_debug_category_get_threshold (cat),
949 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
950 gst_debug_category_get_description (cat));
952 walk = g_slist_next (walk);
957 # endif /* GST_DISABLE_OPTION_PARSING */
958 #endif /* GST_DISABLE_GST_DEBUG */
960 #ifndef GST_DISABLE_OPTION_PARSING
962 parse_one_option (gint opt, const gchar * arg, GError ** err)
966 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
968 case ARG_FATAL_WARNINGS:{
969 GLogLevelFlags fatal_mask;
971 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
972 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
973 g_log_set_always_fatal (fatal_mask);
976 #ifndef GST_DISABLE_GST_DEBUG
977 case ARG_DEBUG_LEVEL:{
978 GstDebugLevel tmp = GST_LEVEL_NONE;
980 tmp = (GstDebugLevel) strtol (arg, NULL, 0);
981 if (((guint) tmp) < GST_LEVEL_COUNT) {
982 gst_debug_set_default_threshold (tmp);
987 gst_debug_set_threshold_from_string (arg, FALSE);
989 case ARG_DEBUG_NO_COLOR:
990 gst_debug_set_colored (FALSE);
992 case ARG_DEBUG_COLOR_MODE:
993 gst_debug_set_color_mode_from_string (arg);
995 case ARG_DEBUG_DISABLE:
996 gst_debug_set_active (FALSE);
1002 case ARG_PLUGIN_SPEW:
1004 case ARG_PLUGIN_PATH:
1005 #ifndef GST_DISABLE_REGISTRY
1006 if (!_priv_gst_disable_registry)
1007 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
1008 #endif /* GST_DISABLE_REGISTRY */
1010 case ARG_PLUGIN_LOAD:
1011 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
1013 case ARG_SEGTRAP_DISABLE:
1014 _gst_disable_segtrap = TRUE;
1016 case ARG_REGISTRY_UPDATE_DISABLE:
1017 #ifndef GST_DISABLE_REGISTRY
1018 if (!_priv_gst_disable_registry)
1019 _priv_gst_disable_registry_update = TRUE;
1022 case ARG_REGISTRY_FORK_DISABLE:
1023 gst_registry_fork_set_enabled (FALSE);
1026 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
1027 _("Unknown option"));
1036 parse_goption_arg (const gchar * opt,
1037 const gchar * arg, gpointer data, GError ** err)
1045 "--gst-version", ARG_VERSION}, {
1046 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
1047 #ifndef GST_DISABLE_GST_DEBUG
1049 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
1050 "--gst-debug", ARG_DEBUG}, {
1051 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
1052 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
1053 "--gst-debug-color-mode", ARG_DEBUG_COLOR_MODE}, {
1054 "--gst-debug-help", ARG_DEBUG_HELP},
1057 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
1058 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
1059 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
1060 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
1061 "--gst-disable-registry-update", ARG_REGISTRY_UPDATE_DISABLE}, {
1062 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
1067 for (n = 0; options[n].opt; n++) {
1068 if (!strcmp (opt, options[n].opt)) {
1069 val = options[n].val;
1074 return parse_one_option (val, arg, err);
1082 * Clean up any resources created by GStreamer in gst_init().
1084 * It is normally not needed to call this function in a normal application
1085 * as the resources will automatically be freed when the program terminates.
1086 * This function is therefore mostly used by testsuites and other memory
1089 * After this call GStreamer (including this method) should not be used anymore.
1094 GstBinClass *bin_class;
1096 g_mutex_lock (&init_lock);
1098 if (!gst_initialized) {
1099 g_mutex_unlock (&init_lock);
1102 if (gst_deinitialized) {
1103 /* tell the user how naughty they've been */
1104 g_error ("GStreamer should not be deinitialized a second time.");
1107 GST_INFO ("deinitializing GStreamer");
1108 g_thread_pool_set_max_unused_threads (0);
1109 bin_class = (GstBinClass *) g_type_class_peek (gst_bin_get_type ());
1110 if (bin_class && bin_class->pool != NULL) {
1111 g_thread_pool_free (bin_class->pool, FALSE, TRUE);
1112 bin_class->pool = NULL;
1114 gst_task_cleanup_all ();
1116 g_slist_foreach (_priv_gst_preload_plugins, (GFunc) g_free, NULL);
1117 g_slist_free (_priv_gst_preload_plugins);
1118 _priv_gst_preload_plugins = NULL;
1120 #ifndef GST_DISABLE_REGISTRY
1121 g_list_foreach (_priv_gst_plugin_paths, (GFunc) g_free, NULL);
1122 g_list_free (_priv_gst_plugin_paths);
1123 _priv_gst_plugin_paths = NULL;
1126 if (_gst_executable_path) {
1127 g_free (_gst_executable_path);
1128 _gst_executable_path = NULL;
1131 GstClock *clock = gst_system_clock_obtain ();
1132 gst_object_unref (clock);
1133 gst_clear_object (&clock);
1135 _priv_gst_registry_cleanup ();
1136 _priv_gst_allocator_cleanup ();
1138 /* We want to destroy tracers as late as possible for the leaks tracer
1139 * but still need to keep the caps system alive as it may have to use
1140 * gst_caps_to_string() to display leaked caps. */
1141 #ifndef GST_DISABLE_GST_DEBUG
1142 _priv_gst_tracing_deinit ();
1145 _priv_gst_caps_features_cleanup ();
1146 _priv_gst_caps_cleanup ();
1147 _priv_gst_meta_cleanup ();
1149 g_type_class_unref (g_type_class_peek (gst_object_get_type ()));
1150 g_type_class_unref (g_type_class_peek (gst_pad_get_type ()));
1151 g_type_class_unref (g_type_class_peek (gst_element_factory_get_type ()));
1152 g_type_class_unref (g_type_class_peek (gst_element_get_type ()));
1153 g_type_class_unref (g_type_class_peek (gst_tracer_factory_get_type ()));
1154 g_type_class_unref (g_type_class_peek (gst_type_find_factory_get_type ()));
1155 g_type_class_unref (g_type_class_peek (gst_bin_get_type ()));
1156 g_type_class_unref (g_type_class_peek (gst_bus_get_type ()));
1157 g_type_class_unref (g_type_class_peek (gst_task_get_type ()));
1158 g_type_class_unref (g_type_class_peek (gst_object_flags_get_type ()));
1159 g_type_class_unref (g_type_class_peek (gst_bin_flags_get_type ()));
1160 g_type_class_unref (g_type_class_peek (gst_buffer_flags_get_type ()));
1161 g_type_class_unref (g_type_class_peek (gst_buffer_copy_flags_get_type ()));
1162 g_type_class_unref (g_type_class_peek (gst_bus_flags_get_type ()));
1163 g_type_class_unref (g_type_class_peek (gst_bus_sync_reply_get_type ()));
1164 g_type_class_unref (g_type_class_peek (gst_caps_flags_get_type ()));
1165 g_type_class_unref (g_type_class_peek (gst_clock_type_get_type ()));
1166 g_type_class_unref (g_type_class_peek (gst_clock_return_get_type ()));
1167 g_type_class_unref (g_type_class_peek (gst_clock_entry_type_get_type ()));
1168 g_type_class_unref (g_type_class_peek (gst_clock_flags_get_type ()));
1169 g_type_class_unref (g_type_class_peek (gst_debug_graph_details_get_type ()));
1170 g_type_class_unref (g_type_class_peek (gst_state_get_type ()));
1171 g_type_class_unref (g_type_class_peek (gst_state_change_return_get_type ()));
1172 g_type_class_unref (g_type_class_peek (gst_state_change_get_type ()));
1173 g_type_class_unref (g_type_class_peek (gst_element_flags_get_type ()));
1174 g_type_class_unref (g_type_class_peek (gst_tracer_value_scope_get_type ()));
1175 g_type_class_unref (g_type_class_peek (gst_tracer_value_flags_get_type ()));
1176 g_type_class_unref (g_type_class_peek (gst_core_error_get_type ()));
1177 g_type_class_unref (g_type_class_peek (gst_library_error_get_type ()));
1178 g_type_class_unref (g_type_class_peek (gst_plugin_dependency_flags_get_type
1180 g_type_class_unref (g_type_class_peek (gst_parse_flags_get_type ()));
1181 g_type_class_unref (g_type_class_peek (gst_resource_error_get_type ()));
1182 g_type_class_unref (g_type_class_peek (gst_search_mode_get_type ()));
1183 g_type_class_unref (g_type_class_peek (gst_stream_error_get_type ()));
1184 g_type_class_unref (g_type_class_peek (gst_stream_status_type_get_type ()));
1185 g_type_class_unref (g_type_class_peek (gst_structure_change_type_get_type
1187 g_type_class_unref (g_type_class_peek (gst_event_type_flags_get_type ()));
1188 g_type_class_unref (g_type_class_peek (gst_event_type_get_type ()));
1189 g_type_class_unref (g_type_class_peek (gst_seek_type_get_type ()));
1190 g_type_class_unref (g_type_class_peek (gst_seek_flags_get_type ()));
1191 g_type_class_unref (g_type_class_peek (gst_qos_type_get_type ()));
1192 g_type_class_unref (g_type_class_peek (gst_format_get_type ()));
1193 g_type_class_unref (g_type_class_peek (gst_debug_level_get_type ()));
1194 g_type_class_unref (g_type_class_peek (gst_debug_color_flags_get_type ()));
1195 g_type_class_unref (g_type_class_peek (gst_iterator_result_get_type ()));
1196 g_type_class_unref (g_type_class_peek (gst_iterator_item_get_type ()));
1197 g_type_class_unref (g_type_class_peek (gst_message_type_get_type ()));
1198 g_type_class_unref (g_type_class_peek (gst_meta_flags_get_type ()));
1199 g_type_class_unref (g_type_class_peek (gst_mini_object_flags_get_type ()));
1200 g_type_class_unref (g_type_class_peek (gst_pad_link_return_get_type ()));
1201 g_type_class_unref (g_type_class_peek (gst_pad_link_check_get_type ()));
1202 g_type_class_unref (g_type_class_peek (gst_flow_return_get_type ()));
1203 g_type_class_unref (g_type_class_peek (gst_pad_mode_get_type ()));
1204 g_type_class_unref (g_type_class_peek (gst_pad_direction_get_type ()));
1205 g_type_class_unref (g_type_class_peek (gst_pad_flags_get_type ()));
1206 g_type_class_unref (g_type_class_peek (gst_pad_presence_get_type ()));
1207 g_type_class_unref (g_type_class_peek (gst_pad_template_flags_get_type ()));
1208 g_type_class_unref (g_type_class_peek (gst_pipeline_flags_get_type ()));
1209 g_type_class_unref (g_type_class_peek (gst_plugin_error_get_type ()));
1210 g_type_class_unref (g_type_class_peek (gst_plugin_flags_get_type ()));
1211 g_type_class_unref (g_type_class_peek (gst_rank_get_type ()));
1212 g_type_class_unref (g_type_class_peek (gst_query_type_flags_get_type ()));
1213 g_type_class_unref (g_type_class_peek (gst_query_type_get_type ()));
1214 g_type_class_unref (g_type_class_peek (gst_buffering_mode_get_type ()));
1215 g_type_class_unref (g_type_class_peek (gst_tag_merge_mode_get_type ()));
1216 g_type_class_unref (g_type_class_peek (gst_tag_flag_get_type ()));
1217 g_type_class_unref (g_type_class_peek (gst_tag_scope_get_type ()));
1218 g_type_class_unref (g_type_class_peek (gst_task_state_get_type ()));
1219 g_type_class_unref (g_type_class_peek (gst_toc_entry_type_get_type ()));
1220 g_type_class_unref (g_type_class_peek (gst_toc_scope_get_type ()));
1221 g_type_class_unref (g_type_class_peek (gst_type_find_probability_get_type
1223 g_type_class_unref (g_type_class_peek (gst_uri_type_get_type ()));
1224 g_type_class_unref (g_type_class_peek (gst_uri_error_get_type ()));
1225 g_type_class_unref (g_type_class_peek (gst_parse_error_get_type ()));
1226 g_type_class_unref (g_type_class_peek (gst_param_spec_fraction_get_type ()));
1227 g_type_class_unref (g_type_class_peek (gst_progress_type_get_type ()));
1228 g_type_class_unref (g_type_class_peek (gst_buffer_pool_acquire_flags_get_type
1230 g_type_class_unref (g_type_class_peek (gst_memory_flags_get_type ()));
1231 g_type_class_unref (g_type_class_peek (gst_map_flags_get_type ()));
1232 g_type_class_unref (g_type_class_peek (gst_caps_intersect_mode_get_type ()));
1233 g_type_class_unref (g_type_class_peek (gst_pad_probe_type_get_type ()));
1234 g_type_class_unref (g_type_class_peek (gst_pad_probe_return_get_type ()));
1235 g_type_class_unref (g_type_class_peek (gst_segment_flags_get_type ()));
1236 g_type_class_unref (g_type_class_peek (gst_scheduling_flags_get_type ()));
1237 g_type_class_unref (g_type_class_peek (gst_stream_type_get_type ()));
1239 g_type_class_unref (g_type_class_peek (gst_control_binding_get_type ()));
1240 g_type_class_unref (g_type_class_peek (gst_control_source_get_type ()));
1241 g_type_class_unref (g_type_class_peek (gst_toc_entry_type_get_type ()));
1242 g_type_class_unref (g_type_class_peek (gst_toc_loop_type_get_type ()));
1243 g_type_class_unref (g_type_class_peek (gst_lock_flags_get_type ()));
1244 g_type_class_unref (g_type_class_peek (gst_allocator_flags_get_type ()));
1245 g_type_class_unref (g_type_class_peek (gst_stream_flags_get_type ()));
1246 g_type_class_unref (g_type_class_peek (gst_debug_color_mode_get_type ()));
1247 g_type_class_unref (g_type_class_peek (gst_stack_trace_flags_get_type ()));
1248 g_type_class_unref (g_type_class_peek (gst_promise_result_get_type ()));
1250 gst_deinitialized = TRUE;
1251 GST_INFO ("deinitialized GStreamer");
1252 g_mutex_unlock (&init_lock);
1254 #ifndef GST_DISABLE_GST_DEBUG
1255 /* Doing this as the very last step to allow the above GST_INFO() to work
1256 * correctly. It's of course making the above statement a lie: for a short
1257 * while we're not deinitialized yet */
1258 _priv_gst_debug_cleanup ();
1264 * @major: (out): pointer to a guint to store the major version number
1265 * @minor: (out): pointer to a guint to store the minor version number
1266 * @micro: (out): pointer to a guint to store the micro version number
1267 * @nano: (out): pointer to a guint to store the nano version number
1269 * Gets the version number of the GStreamer library.
1272 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1274 g_return_if_fail (major);
1275 g_return_if_fail (minor);
1276 g_return_if_fail (micro);
1277 g_return_if_fail (nano);
1279 *major = GST_VERSION_MAJOR;
1280 *minor = GST_VERSION_MINOR;
1281 *micro = GST_VERSION_MICRO;
1282 *nano = GST_VERSION_NANO;
1286 * gst_version_string:
1288 * This function returns a string that is useful for describing this version
1289 * of GStreamer to the outside world: user agent strings, logging, ...
1291 * Returns: (transfer full): a newly allocated string describing this version
1296 gst_version_string (void)
1298 guint major, minor, micro, nano;
1300 gst_version (&major, &minor, µ, &nano);
1302 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1304 return g_strdup_printf ("GStreamer %d.%d.%d (GIT)", major, minor, micro);
1306 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1311 * gst_segtrap_is_enabled:
1313 * Some functions in the GStreamer core might install a custom SIGSEGV handler
1314 * to better catch and report errors to the application. Currently this feature
1315 * is enabled by default when loading plugins.
1317 * Applications might want to disable this behaviour with the
1318 * gst_segtrap_set_enabled() function. This is typically done if the application
1319 * wants to install its own handler without GStreamer interfering.
1321 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1324 gst_segtrap_is_enabled (void)
1326 /* yeps, it's enabled when it's not disabled */
1327 return !_gst_disable_segtrap;
1331 * gst_segtrap_set_enabled:
1332 * @enabled: whether a custom SIGSEGV handler should be installed.
1334 * Applications might want to disable/enable the SIGSEGV handling of
1335 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1338 gst_segtrap_set_enabled (gboolean enabled)
1340 _gst_disable_segtrap = !enabled;