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. Any discrete
31 * (packetizable) media type is supported, with provisions for automatically
32 * determining source type. Formatting/framing information is provided with
33 * a powerful negotiation framework. Plugins are heavily used to provide for
34 * all elements, allowing one to construct plugins outside of the GST
35 * library, even released binary-only if license require (please don't).
36 * GStreamer covers a wide range of use cases including: playback, recording,
37 * editing, serving streams, voice over ip and video calls.
39 * The `GStreamer` library should be initialized with
40 * gst_init() before it can be used. You should pass pointers to the main argc
41 * and argv variables so that GStreamer can process its own command line
42 * options, as shown in the following example.
44 * ## Initializing the gstreamer library
46 * |[ <!-- language="C" -->
48 * main (int argc, char *argv[])
50 * // initialize the GStreamer library
51 * gst_init (&argc, &argv);
56 * It's allowed to pass two %NULL pointers to gst_init() in case you don't want
57 * to pass the command line args to GStreamer.
59 * You can also use GOption to initialize your own parameters as shown in
60 * the next code fragment:
62 * ## Initializing own parameters when initializing gstreamer
63 * |[ <!-- language="C" -->
64 * static gboolean stats = FALSE;
67 * main (int argc, char *argv[])
69 * GOptionEntry options[] = {
70 * {"tags", 't', 0, G_OPTION_ARG_NONE, &tags,
71 * N_("Output tags (also known as metadata)"), NULL},
74 * ctx = g_option_context_new ("[ADDITIONAL ARGUMENTS]");
75 * g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
76 * g_option_context_add_group (ctx, gst_init_get_option_group ());
77 * if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
78 * g_print ("Error initializing: %s\n", GST_STR_NULL (err->message));
81 * g_option_context_free (ctx);
86 * Use gst_version() to query the library version at runtime or use the
87 * GST_VERSION_* macros to find the version at compile time. Optionally
88 * gst_version_string() returns a printable string.
90 * The gst_deinit() call is used to clean up all internal resources used
91 * by GStreamer. It is mostly used in unit tests to check for leaks.
94 #include "gst_private.h"
95 #include "gstconfig.h"
98 #include <sys/types.h>
99 #ifdef HAVE_SYS_UTSNAME_H
100 #include <sys/utsname.h>
106 #define WIN32_LEAN_AND_MEAN /* prevents from including too many things */
107 #include <windows.h> /* GetStdHandle, windows console */
109 #if defined (__APPLE__)
110 #include "TargetConditionals.h"
111 #if !TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR && !TARGET_OS_EMBEDDED
112 #include <libproc.h> /* proc_pidpath, PROC_PIDPATHINFO_MAXSIZE */
116 #include "gst-i18n-lib.h"
117 #include <locale.h> /* for LC_ALL */
121 #define GST_CAT_DEFAULT GST_CAT_GST_INIT
123 #define MAX_PATH_SPLIT 16
124 #define GST_PLUGIN_SEPARATOR ","
126 static gboolean gst_initialized = FALSE;
127 static gboolean gst_deinitialized = FALSE;
129 GstClockTime _priv_gst_start_time;
132 HMODULE _priv_gst_dll_handle = NULL;
135 #ifndef GST_DISABLE_REGISTRY
136 GList *_priv_gst_plugin_paths = NULL; /* for delayed processing in init_post */
138 extern gboolean _priv_gst_disable_registry;
139 extern gboolean _priv_gst_disable_registry_update;
142 gchar *_gst_executable_path = NULL;
144 #ifndef GST_DISABLE_GST_DEBUG
145 const gchar *priv_gst_dump_dot_dir;
150 /* set to TRUE when segfaults need to be left as is */
151 static gboolean _gst_disable_segtrap = FALSE;
153 static gboolean init_pre (GOptionContext * context, GOptionGroup * group,
154 gpointer data, GError ** error);
155 static gboolean init_post (GOptionContext * context, GOptionGroup * group,
156 gpointer data, GError ** error);
157 #ifndef GST_DISABLE_OPTION_PARSING
158 static gboolean parse_goption_arg (const gchar * s_opt,
159 const gchar * arg, gpointer data, GError ** err);
162 GSList *_priv_gst_preload_plugins = NULL;
164 const gchar g_log_domain_gstreamer[] = "GStreamer";
167 debug_log_handler (const gchar * log_domain,
168 GLogLevelFlags log_level, const gchar * message, gpointer user_data)
170 g_log_default_handler (log_domain, log_level, message, user_data);
171 /* FIXME: do we still need this ? fatal errors these days are all
172 * other than core errors */
173 /* g_on_error_query (NULL); */
180 #ifndef GST_DISABLE_GST_DEBUG
185 ARG_DEBUG_COLOR_MODE,
192 ARG_REGISTRY_UPDATE_DISABLE,
193 ARG_REGISTRY_FORK_DISABLE
196 /* debug-spec ::= category-spec [, category-spec]*
197 * category-spec ::= category:val | val
203 /* Note: DllMain is only called when DLLs are loaded or unloaded, so this will
204 * never be called if libgstreamer-1.0 is linked statically. Do not add any code
205 * here to, say, initialize variables or set things up since that will only
206 * happen for dynamically-built GStreamer.
208 * Also, ideally this should not be defined when GStreamer is built statically.
209 * i.e., it should be conditional on #ifdef DLL_EXPORT. It will be ignored, but
210 * if other libraries make the same mistake of defining it when building
211 * statically, there will be a symbol collision during linking. Fixing this
212 * requires one to build two object files: one for static linking and another
213 * for dynamic linking. */
214 BOOL WINAPI DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
216 DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
218 if (fdwReason == DLL_PROCESS_ATTACH)
219 _priv_gst_dll_handle = (HMODULE) hinstDLL;
226 * gst_init_get_option_group: (skip)
228 * Returns a #GOptionGroup with GStreamer's argument specifications. The
229 * group is set up to use standard GOption callbacks, so when using this
230 * group in combination with GOption parsing methods, all argument parsing
231 * and initialization is automated.
233 * This function is useful if you want to integrate GStreamer with other
234 * libraries that use GOption (see g_option_context_add_group() ).
236 * If you use this function, you should make sure you initialise the GLib
237 * threading system as one of the very first things in your program
238 * (see the example at the beginning of this section).
240 * Returns: (transfer full) (nullable): a pointer to GStreamer's option group.
244 gst_init_get_option_group (void)
246 #ifndef GST_DISABLE_OPTION_PARSING
248 static const GOptionEntry gst_args[] = {
249 {"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
250 (gpointer) parse_goption_arg, N_("Print the GStreamer version"), NULL},
251 {"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
252 (gpointer) parse_goption_arg, N_("Make all warnings fatal"), NULL},
253 #ifndef GST_DISABLE_GST_DEBUG
254 {"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
255 (gpointer) parse_goption_arg,
256 N_("Print available debug categories and exit"),
258 {"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK,
259 (gpointer) parse_goption_arg,
260 N_("Default debug level from 1 (only error) to 9 (anything) or "
263 {"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) parse_goption_arg,
264 N_("Comma-separated list of category_name:level pairs to set "
265 "specific levels for the individual categories. Example: "
266 "GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
268 {"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
269 (gpointer) parse_goption_arg, N_("Disable colored debugging output"),
271 {"gst-debug-color-mode", 0, 0, G_OPTION_ARG_CALLBACK,
272 (gpointer) parse_goption_arg,
273 N_("Changes coloring mode of the debug log. "
274 "Possible modes: off, on, disable, auto, unix"),
276 {"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
277 (gpointer) parse_goption_arg, N_("Disable debugging"), NULL},
279 {"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
280 (gpointer) parse_goption_arg,
281 N_("Enable verbose plugin loading diagnostics"),
283 {"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK,
284 (gpointer) parse_goption_arg,
285 N_("Colon-separated paths containing plugins"), N_("PATHS")},
286 {"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK,
287 (gpointer) parse_goption_arg,
288 N_("Comma-separated list of plugins to preload in addition to the "
289 "list stored in environment variable GST_PLUGIN_PATH"),
291 {"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
292 (gpointer) parse_goption_arg,
293 N_("Disable trapping of segmentation faults during plugin loading"),
295 {"gst-disable-registry-update", 0, G_OPTION_FLAG_NO_ARG,
296 G_OPTION_ARG_CALLBACK,
297 (gpointer) parse_goption_arg,
298 N_("Disable updating the registry"),
300 {"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
301 G_OPTION_ARG_CALLBACK,
302 (gpointer) parse_goption_arg,
303 N_("Disable spawning a helper process while scanning the registry"),
308 group = g_option_group_new ("gst", _("GStreamer Options"),
309 _("Show GStreamer Options"), NULL, NULL);
310 g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
311 (GOptionParseFunc) init_post);
313 g_option_group_add_entries (group, gst_args);
314 g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
322 #if defined(__linux__)
324 find_executable_path (void)
326 GError *error = NULL;
328 if (_gst_executable_path)
331 _gst_executable_path = g_file_read_link ("/proc/self/exe", &error);
333 g_error_free (error);
335 #elif defined(G_OS_WIN32)
337 find_executable_path (void)
339 char buffer[MAX_PATH];
341 if (!GetModuleFileName (NULL, buffer, MAX_PATH))
344 _gst_executable_path = g_strdup (buffer);
346 #elif defined(__APPLE__) && !TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR && !TARGET_OS_EMBEDDED
348 find_executable_path (void)
352 char pathbuf[PROC_PIDPATHINFO_MAXSIZE];
355 ret = proc_pidpath (pid, pathbuf, sizeof (pathbuf));
357 _gst_executable_path = g_strdup (pathbuf);
361 find_executable_path (void)
363 GST_FIXME ("Couldn't look up executable path, add support for this platform");
368 * gst_get_main_executable_path:
370 * This helper is mostly helpful for plugins that need to
371 * inspect the folder of the main executable to determine
372 * their set of features.
374 * When a plugin is initialized from the gst-plugin-scanner
375 * external process, the returned path will be the same as from the
378 * Returns: (transfer none) (nullable): The path of the executable that
379 * initialized GStreamer, or %NULL if it could not be determined.
384 gst_get_main_executable_path (void)
386 return _gst_executable_path;
391 * @argc: (inout) (allow-none): pointer to application's argc
392 * @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
393 * @err: pointer to a #GError to which a message will be posted on error
395 * Initializes the GStreamer library, setting up internal path lists,
396 * registering built-in elements, and loading standard plugins.
398 * This function will return %FALSE if GStreamer could not be initialized
399 * for some reason. If you want your program to fail fatally,
400 * use gst_init() instead.
402 * Returns: %TRUE if GStreamer could be initialized.
405 gst_init_check (int *argc, char **argv[], GError ** err)
407 static GMutex init_lock;
408 #ifndef GST_DISABLE_OPTION_PARSING
414 g_mutex_lock (&init_lock);
416 if (gst_initialized) {
417 GST_DEBUG ("already initialized gst");
418 g_mutex_unlock (&init_lock);
421 #ifndef GST_DISABLE_OPTION_PARSING
422 ctx = g_option_context_new ("- GStreamer initialization");
423 g_option_context_set_ignore_unknown_options (ctx, TRUE);
424 g_option_context_set_help_enabled (ctx, FALSE);
425 group = gst_init_get_option_group ();
426 g_option_context_add_group (ctx, group);
427 res = g_option_context_parse (ctx, argc, argv, err);
428 g_option_context_free (ctx);
430 init_pre (NULL, NULL, NULL, NULL);
431 init_post (NULL, NULL, NULL, NULL);
435 gst_initialized = res;
437 g_mutex_unlock (&init_lock);
444 * @argc: (inout) (allow-none): pointer to application's argc
445 * @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
447 * Initializes the GStreamer library, setting up internal path lists,
448 * registering built-in elements, and loading standard plugins.
450 * Unless the plugin registry is disabled at compile time, the registry will be
451 * loaded. By default this will also check if the registry cache needs to be
452 * updated and rescan all plugins if needed. See gst_update_registry() for
453 * details and section
454 * <link linkend="gst-running">Running GStreamer Applications</link>
455 * for how to disable automatic registry updates.
457 * > This function will terminate your program if it was unable to initialize
458 * > GStreamer for some reason. If you want your program to fall back,
459 * > use gst_init_check() instead.
461 * WARNING: This function does not work in the same way as corresponding
462 * functions in other glib-style libraries, such as gtk_init\(\). In
463 * particular, unknown command line options cause this function to
464 * abort program execution.
467 gst_init (int *argc, char **argv[])
471 if (!gst_init_check (argc, argv, &err)) {
472 g_print ("Could not initialize GStreamer: %s\n",
473 err ? err->message : "unknown error occurred");
482 * gst_is_initialized:
484 * Use this function to check if GStreamer has been initialized with gst_init()
485 * or gst_init_check().
487 * Returns: %TRUE if initialization has been done, %FALSE otherwise.
490 gst_is_initialized (void)
492 return gst_initialized;
495 #ifndef GST_DISABLE_OPTION_PARSING
496 # ifndef GST_DISABLE_REGISTRY
498 add_path_func (gpointer data, gpointer user_data)
500 GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
501 _priv_gst_plugin_paths =
502 g_list_append (_priv_gst_plugin_paths, g_strdup (data));
507 #ifndef GST_DISABLE_OPTION_PARSING
509 prepare_for_load_plugin_func (gpointer data, gpointer user_data)
511 _priv_gst_preload_plugins =
512 g_slist_prepend (_priv_gst_preload_plugins, g_strdup (data));
516 #ifndef GST_DISABLE_OPTION_PARSING
518 split_and_iterate (const gchar * stringlist, const gchar * separator,
519 GFunc iterator, gpointer user_data)
523 gchar *lastlist = g_strdup (stringlist);
526 strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
531 iterator (strings[j], user_data);
532 if (++j == MAX_PATH_SPLIT) {
533 lastlist = g_strdup (strings[j]);
538 g_strfreev (strings);
543 /* we have no fail cases yet, but maybe in the future */
545 init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
549 if (gst_initialized) {
550 GST_DEBUG ("already initialized");
554 find_executable_path ();
556 _priv_gst_start_time = gst_util_get_timestamp ();
558 #ifndef GST_DISABLE_GST_DEBUG
559 _priv_gst_debug_init ();
560 priv_gst_dump_dot_dir = g_getenv ("GST_DEBUG_DUMP_DOT_DIR");
564 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
565 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
566 #endif /* ENABLE_NLS */
568 /* This is the earliest we can make stuff show up in the logs.
569 * So give some useful info about GStreamer here */
573 g_win32_get_package_installation_directory_of_module
574 (_priv_gst_dll_handle);
576 libdir = g_build_filename (basedir,
584 libdir = g_strdup (LIBDIR);
586 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
587 GST_INFO ("Using library installed in %s", libdir);
590 #ifndef GST_DISABLE_REGISTRY
592 const gchar *disable_registry;
593 if ((disable_registry = g_getenv ("GST_REGISTRY_DISABLE"))) {
594 _priv_gst_disable_registry = (strcmp (disable_registry, "yes") == 0);
599 /* Print some basic system details if possible (OS/architecture) */
600 #ifdef HAVE_SYS_UTSNAME_H
602 struct utsname sys_details;
604 if (uname (&sys_details) == 0) {
605 GST_INFO ("%s %s %s %s %s", sys_details.sysname,
606 sys_details.nodename, sys_details.release, sys_details.version,
607 sys_details.machine);
612 #ifndef G_ATOMIC_LOCK_FREE
613 GST_CAT_WARNING (GST_CAT_PERFORMANCE, "GLib atomic operations are NOT "
614 "implemented using real hardware atomic operations!");
621 gst_register_core_elements (GstPlugin * plugin)
623 /* register some standard builtin types */
624 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
626 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
629 g_assert_not_reached ();
636 * - initialization of threads if we use them
639 * - initializes gst_format
640 * - registers a bunch of types for gst_objects
642 * - we don't have cases yet where this fails, but in the future
643 * we might and then it's nice to be able to return that
646 init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
651 if (gst_initialized) {
652 GST_DEBUG ("already initialized");
656 llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
657 g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
659 _priv_gst_mini_object_initialize ();
660 _priv_gst_quarks_initialize ();
661 _priv_gst_allocator_initialize ();
662 _priv_gst_memory_initialize ();
663 _priv_gst_format_initialize ();
664 _priv_gst_query_initialize ();
665 _priv_gst_structure_initialize ();
666 _priv_gst_caps_initialize ();
667 _priv_gst_caps_features_initialize ();
668 _priv_gst_meta_initialize ();
669 _priv_gst_message_initialize ();
671 g_type_class_ref (gst_object_get_type ());
672 g_type_class_ref (gst_pad_get_type ());
673 g_type_class_ref (gst_element_factory_get_type ());
674 g_type_class_ref (gst_element_get_type ());
675 g_type_class_ref (gst_tracer_factory_get_type ());
676 g_type_class_ref (gst_type_find_factory_get_type ());
677 g_type_class_ref (gst_bin_get_type ());
678 g_type_class_ref (gst_bus_get_type ());
679 g_type_class_ref (gst_task_get_type ());
680 g_type_class_ref (gst_clock_get_type ());
681 g_type_class_ref (gst_debug_color_mode_get_type ());
683 gst_uri_handler_get_type ();
685 g_type_class_ref (gst_object_flags_get_type ());
686 g_type_class_ref (gst_bin_flags_get_type ());
687 g_type_class_ref (gst_buffer_flags_get_type ());
688 g_type_class_ref (gst_buffer_copy_flags_get_type ());
689 g_type_class_ref (gst_bus_flags_get_type ());
690 g_type_class_ref (gst_bus_sync_reply_get_type ());
691 g_type_class_ref (gst_caps_flags_get_type ());
692 g_type_class_ref (gst_clock_return_get_type ());
693 g_type_class_ref (gst_clock_entry_type_get_type ());
694 g_type_class_ref (gst_clock_flags_get_type ());
695 g_type_class_ref (gst_clock_type_get_type ());
696 g_type_class_ref (gst_debug_graph_details_get_type ());
697 g_type_class_ref (gst_state_get_type ());
698 g_type_class_ref (gst_state_change_return_get_type ());
699 g_type_class_ref (gst_state_change_get_type ());
700 g_type_class_ref (gst_element_flags_get_type ());
701 g_type_class_ref (gst_tracer_value_scope_get_type ());
702 g_type_class_ref (gst_tracer_value_flags_get_type ());
703 g_type_class_ref (gst_core_error_get_type ());
704 g_type_class_ref (gst_library_error_get_type ());
705 g_type_class_ref (gst_resource_error_get_type ());
706 g_type_class_ref (gst_stream_error_get_type ());
707 g_type_class_ref (gst_event_type_flags_get_type ());
708 g_type_class_ref (gst_event_type_get_type ());
709 g_type_class_ref (gst_seek_type_get_type ());
710 g_type_class_ref (gst_seek_flags_get_type ());
711 g_type_class_ref (gst_qos_type_get_type ());
712 g_type_class_ref (gst_format_get_type ());
713 g_type_class_ref (gst_debug_level_get_type ());
714 g_type_class_ref (gst_debug_color_flags_get_type ());
715 g_type_class_ref (gst_iterator_result_get_type ());
716 g_type_class_ref (gst_iterator_item_get_type ());
717 g_type_class_ref (gst_message_type_get_type ());
718 g_type_class_ref (gst_mini_object_flags_get_type ());
719 g_type_class_ref (gst_pad_link_return_get_type ());
720 g_type_class_ref (gst_pad_link_check_get_type ());
721 g_type_class_ref (gst_flow_return_get_type ());
722 g_type_class_ref (gst_pad_mode_get_type ());
723 g_type_class_ref (gst_pad_direction_get_type ());
724 g_type_class_ref (gst_pad_flags_get_type ());
725 g_type_class_ref (gst_pad_presence_get_type ());
726 g_type_class_ref (gst_pad_template_flags_get_type ());
727 g_type_class_ref (gst_pipeline_flags_get_type ());
728 g_type_class_ref (gst_plugin_error_get_type ());
729 g_type_class_ref (gst_plugin_flags_get_type ());
730 g_type_class_ref (gst_plugin_dependency_flags_get_type ());
731 g_type_class_ref (gst_rank_get_type ());
732 g_type_class_ref (gst_query_type_flags_get_type ());
733 g_type_class_ref (gst_query_type_get_type ());
734 g_type_class_ref (gst_buffering_mode_get_type ());
735 g_type_class_ref (gst_stream_status_type_get_type ());
736 g_type_class_ref (gst_structure_change_type_get_type ());
737 g_type_class_ref (gst_tag_merge_mode_get_type ());
738 g_type_class_ref (gst_tag_flag_get_type ());
739 g_type_class_ref (gst_tag_scope_get_type ());
740 g_type_class_ref (gst_task_pool_get_type ());
741 g_type_class_ref (gst_task_state_get_type ());
742 g_type_class_ref (gst_toc_entry_type_get_type ());
743 g_type_class_ref (gst_type_find_probability_get_type ());
744 g_type_class_ref (gst_uri_error_get_type ());
745 g_type_class_ref (gst_uri_type_get_type ());
746 g_type_class_ref (gst_parse_error_get_type ());
747 g_type_class_ref (gst_parse_flags_get_type ());
748 g_type_class_ref (gst_search_mode_get_type ());
749 g_type_class_ref (gst_progress_type_get_type ());
750 g_type_class_ref (gst_buffer_pool_acquire_flags_get_type ());
751 g_type_class_ref (gst_memory_flags_get_type ());
752 g_type_class_ref (gst_map_flags_get_type ());
753 g_type_class_ref (gst_caps_intersect_mode_get_type ());
754 g_type_class_ref (gst_pad_probe_type_get_type ());
755 g_type_class_ref (gst_pad_probe_return_get_type ());
756 g_type_class_ref (gst_segment_flags_get_type ());
757 g_type_class_ref (gst_scheduling_flags_get_type ());
758 g_type_class_ref (gst_meta_flags_get_type ());
759 g_type_class_ref (gst_toc_entry_type_get_type ());
760 g_type_class_ref (gst_toc_scope_get_type ());
761 g_type_class_ref (gst_toc_loop_type_get_type ());
762 g_type_class_ref (gst_control_binding_get_type ());
763 g_type_class_ref (gst_control_source_get_type ());
764 g_type_class_ref (gst_lock_flags_get_type ());
765 g_type_class_ref (gst_allocator_flags_get_type ());
766 g_type_class_ref (gst_stream_flags_get_type ());
767 g_type_class_ref (gst_stream_type_get_type ());
768 g_type_class_ref (gst_stack_trace_flags_get_type ());
769 g_type_class_ref (gst_promise_result_get_type ());
771 _priv_gst_event_initialize ();
772 _priv_gst_buffer_initialize ();
773 _priv_gst_buffer_list_initialize ();
774 _priv_gst_sample_initialize ();
775 _priv_gst_context_initialize ();
776 _priv_gst_date_time_initialize ();
777 _priv_gst_value_initialize ();
778 _priv_gst_tag_initialize ();
779 _priv_gst_toc_initialize ();
781 g_type_class_ref (gst_param_spec_fraction_get_type ());
782 gst_parse_context_get_type ();
784 _priv_gst_plugin_initialize ();
786 /* register core plugins */
787 gst_plugin_register_static (GST_VERSION_MAJOR, GST_VERSION_MINOR,
788 "staticelements", "core elements linked into the GStreamer library",
789 gst_register_core_elements, VERSION, GST_LICENSE, PACKAGE,
790 GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
793 * Any errors happening below this point are non-fatal, we therefore mark
794 * gstreamer as being initialized, since it is the case from a plugin point of
797 * If anything fails, it will be put back to %FALSE in gst_init_check().
798 * This allows some special plugins that would call gst_init() to not cause a
799 * looping effect (i.e. initializing GStreamer twice).
801 gst_initialized = TRUE;
803 if (!gst_update_registry ())
806 GST_INFO ("GLib runtime version: %d.%d.%d", glib_major_version,
807 glib_minor_version, glib_micro_version);
808 GST_INFO ("GLib headers version: %d.%d.%d", GLIB_MAJOR_VERSION,
809 GLIB_MINOR_VERSION, GLIB_MICRO_VERSION);
810 GST_INFO ("initialized GStreamer successfully");
812 /* Adjust initial plugin rank based on the GST_PLUGIN_FEATURE_RANK
813 * environment variable */
814 _priv_gst_plugin_feature_rank_initialize ();
816 #ifndef GST_DISABLE_GST_DEBUG
817 _priv_gst_tracing_init ();
823 #ifndef GST_DISABLE_OPTION_PARSING
824 # ifndef GST_DISABLE_GST_DEBUG
826 select_all (GstPlugin * plugin, gpointer user_data)
832 sort_by_category_name (gconstpointer a, gconstpointer b)
834 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
835 gst_debug_category_get_name ((GstDebugCategory *) b));
839 gst_debug_help (void)
844 /* Need to ensure the registry is loaded to get debug categories */
845 if (!init_post (NULL, NULL, NULL, NULL))
848 list2 = gst_registry_plugin_filter (gst_registry_get (),
849 select_all, FALSE, NULL);
851 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
852 for (g = list2; g; g = g_list_next (g)) {
853 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
854 GList *features, *orig_features;
856 if (GST_OBJECT_FLAG_IS_SET (plugin, GST_PLUGIN_FLAG_BLACKLISTED))
859 gst_plugin_load (plugin);
860 /* Now create one of each feature so the class_init functions
861 * are called, as that's where most debug categories are
862 * registered. FIXME: If debug categories were a plugin feature,
863 * this would be unneeded */
864 orig_features = features =
865 gst_registry_get_feature_list_by_plugin (gst_registry_get (),
866 gst_plugin_get_name (plugin));
868 GstPluginFeature *feature;
870 if (G_UNLIKELY (features->data == NULL))
873 feature = GST_PLUGIN_FEATURE (features->data);
874 if (GST_IS_ELEMENT_FACTORY (feature)) {
875 GstElementFactory *factory;
878 factory = GST_ELEMENT_FACTORY (feature);
879 e = gst_element_factory_create (factory, NULL);
881 gst_object_unref (e);
885 features = g_list_next (features);
888 gst_plugin_feature_list_free (orig_features);
892 list = gst_debug_get_all_categories ();
893 walk = list = g_slist_sort (list, sort_by_category_name);
896 g_print ("name level description\n");
897 g_print ("---------------------+--------+--------------------------------\n");
901 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
902 GstDebugColorMode coloring = gst_debug_get_color_mode ();
909 if (GST_DEBUG_COLOR_MODE_UNIX == coloring
910 || (on_unix && GST_DEBUG_COLOR_MODE_ON == coloring)) {
911 gchar *color = gst_debug_construct_term_color (cat->color);
913 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
915 gst_debug_category_get_name (cat),
916 gst_debug_category_get_threshold (cat),
917 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
918 color, gst_debug_category_get_description (cat));
920 } else if (GST_DEBUG_COLOR_MODE_ON == coloring && !on_unix) {
922 gint color = gst_debug_construct_win_color (cat->color);
923 const gint clear = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
925 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
926 g_print ("%-20s", gst_debug_category_get_name (cat));
927 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
928 g_print (" %1d %s ", gst_debug_category_get_threshold (cat),
929 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)));
930 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
931 g_print ("%s", gst_debug_category_get_description (cat));
932 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
934 #endif /* G_OS_WIN32 */
936 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
937 gst_debug_category_get_threshold (cat),
938 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
939 gst_debug_category_get_description (cat));
941 walk = g_slist_next (walk);
946 # endif /* GST_DISABLE_OPTION_PARSING */
947 #endif /* GST_DISABLE_GST_DEBUG */
949 #ifndef GST_DISABLE_OPTION_PARSING
951 parse_one_option (gint opt, const gchar * arg, GError ** err)
955 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
957 case ARG_FATAL_WARNINGS:{
958 GLogLevelFlags fatal_mask;
960 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
961 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
962 g_log_set_always_fatal (fatal_mask);
965 #ifndef GST_DISABLE_GST_DEBUG
966 case ARG_DEBUG_LEVEL:{
967 GstDebugLevel tmp = GST_LEVEL_NONE;
969 tmp = (GstDebugLevel) strtol (arg, NULL, 0);
970 if (((guint) tmp) < GST_LEVEL_COUNT) {
971 gst_debug_set_default_threshold (tmp);
976 gst_debug_set_threshold_from_string (arg, FALSE);
978 case ARG_DEBUG_NO_COLOR:
979 gst_debug_set_colored (FALSE);
981 case ARG_DEBUG_COLOR_MODE:
982 gst_debug_set_color_mode_from_string (arg);
984 case ARG_DEBUG_DISABLE:
985 gst_debug_set_active (FALSE);
991 case ARG_PLUGIN_SPEW:
993 case ARG_PLUGIN_PATH:
994 #ifndef GST_DISABLE_REGISTRY
995 if (!_priv_gst_disable_registry)
996 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
997 #endif /* GST_DISABLE_REGISTRY */
999 case ARG_PLUGIN_LOAD:
1000 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
1002 case ARG_SEGTRAP_DISABLE:
1003 _gst_disable_segtrap = TRUE;
1005 case ARG_REGISTRY_UPDATE_DISABLE:
1006 #ifndef GST_DISABLE_REGISTRY
1007 if (!_priv_gst_disable_registry)
1008 _priv_gst_disable_registry_update = TRUE;
1011 case ARG_REGISTRY_FORK_DISABLE:
1012 gst_registry_fork_set_enabled (FALSE);
1015 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
1016 _("Unknown option"));
1024 parse_goption_arg (const gchar * opt,
1025 const gchar * arg, gpointer data, GError ** err)
1033 "--gst-version", ARG_VERSION}, {
1034 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
1035 #ifndef GST_DISABLE_GST_DEBUG
1037 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
1038 "--gst-debug", ARG_DEBUG}, {
1039 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
1040 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
1041 "--gst-debug-color-mode", ARG_DEBUG_COLOR_MODE}, {
1042 "--gst-debug-help", ARG_DEBUG_HELP},
1045 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
1046 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
1047 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
1048 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
1049 "--gst-disable-registry-update", ARG_REGISTRY_UPDATE_DISABLE}, {
1050 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
1055 for (n = 0; options[n].opt; n++) {
1056 if (!strcmp (opt, options[n].opt)) {
1057 val = options[n].val;
1062 return parse_one_option (val, arg, err);
1069 * Clean up any resources created by GStreamer in gst_init().
1071 * It is normally not needed to call this function in a normal application
1072 * as the resources will automatically be freed when the program terminates.
1073 * This function is therefore mostly used by testsuites and other memory
1076 * After this call GStreamer (including this method) should not be used anymore.
1081 GstBinClass *bin_class;
1084 if (!gst_initialized)
1087 GST_INFO ("deinitializing GStreamer");
1089 if (gst_deinitialized) {
1090 GST_DEBUG ("already deinitialized");
1093 g_thread_pool_set_max_unused_threads (0);
1094 bin_class = (GstBinClass *) g_type_class_peek (gst_bin_get_type ());
1095 if (bin_class && bin_class->pool != NULL) {
1096 g_thread_pool_free (bin_class->pool, FALSE, TRUE);
1097 bin_class->pool = NULL;
1099 gst_task_cleanup_all ();
1101 g_slist_foreach (_priv_gst_preload_plugins, (GFunc) g_free, NULL);
1102 g_slist_free (_priv_gst_preload_plugins);
1103 _priv_gst_preload_plugins = NULL;
1105 #ifndef GST_DISABLE_REGISTRY
1106 g_list_foreach (_priv_gst_plugin_paths, (GFunc) g_free, NULL);
1107 g_list_free (_priv_gst_plugin_paths);
1108 _priv_gst_plugin_paths = NULL;
1111 if (_gst_executable_path) {
1112 g_free (_gst_executable_path);
1113 _gst_executable_path = NULL;
1116 clock = gst_system_clock_obtain ();
1117 gst_object_unref (clock);
1118 gst_object_unref (clock);
1120 _priv_gst_registry_cleanup ();
1121 _priv_gst_allocator_cleanup ();
1123 /* We want to destroy tracers as late as possible for the leaks tracer
1124 * but still need to keep the caps system alive as it may have to use
1125 * gst_caps_to_string() to display leaked caps. */
1126 #ifndef GST_DISABLE_GST_DEBUG
1127 _priv_gst_tracing_deinit ();
1130 _priv_gst_caps_features_cleanup ();
1131 _priv_gst_caps_cleanup ();
1133 g_type_class_unref (g_type_class_peek (gst_object_get_type ()));
1134 g_type_class_unref (g_type_class_peek (gst_pad_get_type ()));
1135 g_type_class_unref (g_type_class_peek (gst_element_factory_get_type ()));
1136 g_type_class_unref (g_type_class_peek (gst_element_get_type ()));
1137 g_type_class_unref (g_type_class_peek (gst_tracer_factory_get_type ()));
1138 g_type_class_unref (g_type_class_peek (gst_type_find_factory_get_type ()));
1139 g_type_class_unref (g_type_class_peek (gst_bin_get_type ()));
1140 g_type_class_unref (g_type_class_peek (gst_bus_get_type ()));
1141 g_type_class_unref (g_type_class_peek (gst_task_get_type ()));
1142 g_type_class_unref (g_type_class_peek (gst_object_flags_get_type ()));
1143 g_type_class_unref (g_type_class_peek (gst_bin_flags_get_type ()));
1144 g_type_class_unref (g_type_class_peek (gst_buffer_flags_get_type ()));
1145 g_type_class_unref (g_type_class_peek (gst_buffer_copy_flags_get_type ()));
1146 g_type_class_unref (g_type_class_peek (gst_bus_flags_get_type ()));
1147 g_type_class_unref (g_type_class_peek (gst_bus_sync_reply_get_type ()));
1148 g_type_class_unref (g_type_class_peek (gst_caps_flags_get_type ()));
1149 g_type_class_unref (g_type_class_peek (gst_clock_type_get_type ()));
1150 g_type_class_unref (g_type_class_peek (gst_clock_return_get_type ()));
1151 g_type_class_unref (g_type_class_peek (gst_clock_entry_type_get_type ()));
1152 g_type_class_unref (g_type_class_peek (gst_clock_flags_get_type ()));
1153 g_type_class_unref (g_type_class_peek (gst_debug_graph_details_get_type ()));
1154 g_type_class_unref (g_type_class_peek (gst_state_get_type ()));
1155 g_type_class_unref (g_type_class_peek (gst_state_change_return_get_type ()));
1156 g_type_class_unref (g_type_class_peek (gst_state_change_get_type ()));
1157 g_type_class_unref (g_type_class_peek (gst_element_flags_get_type ()));
1158 g_type_class_unref (g_type_class_peek (gst_tracer_value_scope_get_type ()));
1159 g_type_class_unref (g_type_class_peek (gst_tracer_value_flags_get_type ()));
1160 g_type_class_unref (g_type_class_peek (gst_core_error_get_type ()));
1161 g_type_class_unref (g_type_class_peek (gst_library_error_get_type ()));
1162 g_type_class_unref (g_type_class_peek (gst_plugin_dependency_flags_get_type
1164 g_type_class_unref (g_type_class_peek (gst_parse_flags_get_type ()));
1165 g_type_class_unref (g_type_class_peek (gst_resource_error_get_type ()));
1166 g_type_class_unref (g_type_class_peek (gst_search_mode_get_type ()));
1167 g_type_class_unref (g_type_class_peek (gst_stream_error_get_type ()));
1168 g_type_class_unref (g_type_class_peek (gst_stream_status_type_get_type ()));
1169 g_type_class_unref (g_type_class_peek (gst_structure_change_type_get_type
1171 g_type_class_unref (g_type_class_peek (gst_event_type_flags_get_type ()));
1172 g_type_class_unref (g_type_class_peek (gst_event_type_get_type ()));
1173 g_type_class_unref (g_type_class_peek (gst_seek_type_get_type ()));
1174 g_type_class_unref (g_type_class_peek (gst_seek_flags_get_type ()));
1175 g_type_class_unref (g_type_class_peek (gst_qos_type_get_type ()));
1176 g_type_class_unref (g_type_class_peek (gst_format_get_type ()));
1177 g_type_class_unref (g_type_class_peek (gst_debug_level_get_type ()));
1178 g_type_class_unref (g_type_class_peek (gst_debug_color_flags_get_type ()));
1179 g_type_class_unref (g_type_class_peek (gst_iterator_result_get_type ()));
1180 g_type_class_unref (g_type_class_peek (gst_iterator_item_get_type ()));
1181 g_type_class_unref (g_type_class_peek (gst_message_type_get_type ()));
1182 g_type_class_unref (g_type_class_peek (gst_meta_flags_get_type ()));
1183 g_type_class_unref (g_type_class_peek (gst_mini_object_flags_get_type ()));
1184 g_type_class_unref (g_type_class_peek (gst_pad_link_return_get_type ()));
1185 g_type_class_unref (g_type_class_peek (gst_pad_link_check_get_type ()));
1186 g_type_class_unref (g_type_class_peek (gst_flow_return_get_type ()));
1187 g_type_class_unref (g_type_class_peek (gst_pad_mode_get_type ()));
1188 g_type_class_unref (g_type_class_peek (gst_pad_direction_get_type ()));
1189 g_type_class_unref (g_type_class_peek (gst_pad_flags_get_type ()));
1190 g_type_class_unref (g_type_class_peek (gst_pad_presence_get_type ()));
1191 g_type_class_unref (g_type_class_peek (gst_pad_template_flags_get_type ()));
1192 g_type_class_unref (g_type_class_peek (gst_pipeline_flags_get_type ()));
1193 g_type_class_unref (g_type_class_peek (gst_plugin_error_get_type ()));
1194 g_type_class_unref (g_type_class_peek (gst_plugin_flags_get_type ()));
1195 g_type_class_unref (g_type_class_peek (gst_rank_get_type ()));
1196 g_type_class_unref (g_type_class_peek (gst_query_type_flags_get_type ()));
1197 g_type_class_unref (g_type_class_peek (gst_query_type_get_type ()));
1198 g_type_class_unref (g_type_class_peek (gst_buffering_mode_get_type ()));
1199 g_type_class_unref (g_type_class_peek (gst_tag_merge_mode_get_type ()));
1200 g_type_class_unref (g_type_class_peek (gst_tag_flag_get_type ()));
1201 g_type_class_unref (g_type_class_peek (gst_tag_scope_get_type ()));
1202 g_type_class_unref (g_type_class_peek (gst_task_state_get_type ()));
1203 g_type_class_unref (g_type_class_peek (gst_toc_entry_type_get_type ()));
1204 g_type_class_unref (g_type_class_peek (gst_toc_scope_get_type ()));
1205 g_type_class_unref (g_type_class_peek (gst_type_find_probability_get_type
1207 g_type_class_unref (g_type_class_peek (gst_uri_type_get_type ()));
1208 g_type_class_unref (g_type_class_peek (gst_uri_error_get_type ()));
1209 g_type_class_unref (g_type_class_peek (gst_parse_error_get_type ()));
1210 g_type_class_unref (g_type_class_peek (gst_param_spec_fraction_get_type ()));
1211 g_type_class_unref (g_type_class_peek (gst_progress_type_get_type ()));
1212 g_type_class_unref (g_type_class_peek (gst_buffer_pool_acquire_flags_get_type
1214 g_type_class_unref (g_type_class_peek (gst_memory_flags_get_type ()));
1215 g_type_class_unref (g_type_class_peek (gst_map_flags_get_type ()));
1216 g_type_class_unref (g_type_class_peek (gst_caps_intersect_mode_get_type ()));
1217 g_type_class_unref (g_type_class_peek (gst_pad_probe_type_get_type ()));
1218 g_type_class_unref (g_type_class_peek (gst_pad_probe_return_get_type ()));
1219 g_type_class_unref (g_type_class_peek (gst_segment_flags_get_type ()));
1220 g_type_class_unref (g_type_class_peek (gst_scheduling_flags_get_type ()));
1221 g_type_class_unref (g_type_class_peek (gst_stream_type_get_type ()));
1223 g_type_class_unref (g_type_class_peek (gst_control_binding_get_type ()));
1224 g_type_class_unref (g_type_class_peek (gst_control_source_get_type ()));
1225 g_type_class_unref (g_type_class_peek (gst_toc_entry_type_get_type ()));
1226 g_type_class_unref (g_type_class_peek (gst_toc_loop_type_get_type ()));
1227 g_type_class_unref (g_type_class_peek (gst_lock_flags_get_type ()));
1228 g_type_class_unref (g_type_class_peek (gst_allocator_flags_get_type ()));
1229 g_type_class_unref (g_type_class_peek (gst_stream_flags_get_type ()));
1230 g_type_class_unref (g_type_class_peek (gst_debug_color_mode_get_type ()));
1231 g_type_class_unref (g_type_class_peek (gst_stack_trace_flags_get_type ()));
1232 g_type_class_unref (g_type_class_peek (gst_promise_result_get_type ()));
1234 gst_deinitialized = TRUE;
1235 GST_INFO ("deinitialized GStreamer");
1237 /* Doing this as the very last step to allow the above GST_INFO() to work
1238 * correctly. It's of course making the above statement a lie: for a short
1239 * while we're not deinitialized yet */
1240 _priv_gst_debug_cleanup ();
1245 * @major: (out): pointer to a guint to store the major version number
1246 * @minor: (out): pointer to a guint to store the minor version number
1247 * @micro: (out): pointer to a guint to store the micro version number
1248 * @nano: (out): pointer to a guint to store the nano version number
1250 * Gets the version number of the GStreamer library.
1253 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1255 g_return_if_fail (major);
1256 g_return_if_fail (minor);
1257 g_return_if_fail (micro);
1258 g_return_if_fail (nano);
1260 *major = GST_VERSION_MAJOR;
1261 *minor = GST_VERSION_MINOR;
1262 *micro = GST_VERSION_MICRO;
1263 *nano = GST_VERSION_NANO;
1267 * gst_version_string:
1269 * This function returns a string that is useful for describing this version
1270 * of GStreamer to the outside world: user agent strings, logging, ...
1272 * Returns: (transfer full): a newly allocated string describing this version
1277 gst_version_string (void)
1279 guint major, minor, micro, nano;
1281 gst_version (&major, &minor, µ, &nano);
1283 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1285 return g_strdup_printf ("GStreamer %d.%d.%d (GIT)", major, minor, micro);
1287 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1292 * gst_segtrap_is_enabled:
1294 * Some functions in the GStreamer core might install a custom SIGSEGV handler
1295 * to better catch and report errors to the application. Currently this feature
1296 * is enabled by default when loading plugins.
1298 * Applications might want to disable this behaviour with the
1299 * gst_segtrap_set_enabled() function. This is typically done if the application
1300 * wants to install its own handler without GStreamer interfering.
1302 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1305 gst_segtrap_is_enabled (void)
1307 /* yeps, it's enabled when it's not disabled */
1308 return !_gst_disable_segtrap;
1312 * gst_segtrap_set_enabled:
1313 * @enabled: whether a custom SIGSEGV handler should be installed.
1315 * Applications might want to disable/enable the SIGSEGV handling of
1316 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1319 gst_segtrap_set_enabled (gboolean enabled)
1321 _gst_disable_segtrap = !enabled;