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., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
25 * @short_description: Media library supporting arbitrary formats and filter
27 * @see_also: Check out both <ulink url="http://www.cse.ogi.edu/sysl/">OGI's
28 * pipeline</ulink> and Microsoft's DirectShow for some background.
30 * GStreamer is a framework for constructing graphs of various filters
31 * (termed elements here) that will handle streaming media. Any discreet
32 * (packetizable) media type is supported, with provisions for automatically
33 * determining source type. Formatting/framing information is provided with
34 * a powerful negotiation framework. Plugins are heavily used to provide for
35 * all elements, allowing one to construct plugins outside of the GST
36 * library, even released binary-only if license require (please don't).
38 * GStreamer borrows heavily from both the <ulink
39 * url="http://www.cse.ogi.edu/sysl/">OGI media pipeline</ulink> and
40 * Microsoft's DirectShow, hopefully taking the best of both and leaving the
41 * cruft behind. Its interface is slowly getting stable.
43 * The <application>GStreamer</application> library should be initialized with
44 * gst_init() before it can be used. You should pass pointers to the main argc
45 * and argv variables so that GStreamer can process its own command line
46 * options, as shown in the following example.
49 * <title>Initializing the gstreamer library</title>
50 * <programlisting language="c">
52 * main (int argc, char *argv[])
54 * // initialize the GStreamer library
55 * 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 GOption to initialize your own parameters as shown in
65 * the next code fragment:
67 * <title>Initializing own parameters when initializing gstreamer</title>
69 * static gboolean stats = FALSE;
72 * main (int argc, char *argv[])
74 * GOptionEntry options[] = {
75 * {"tags", 't', 0, G_OPTION_ARG_NONE, &tags,
76 * N_("Output tags (also known as metadata)"), NULL},
79 * ctx = g_option_context_new ("gst-launch");
80 * g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
81 * g_option_context_add_group (ctx, gst_init_get_option_group ());
82 * if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
83 * g_print ("Error initializing: %s\n", GST_STR_NULL (err->message));
86 * 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 <application>GStreamer</application>. It is mostly used in unit tests
100 * Last reviewed on 2006-08-11 (0.10.10)
103 #include "gst_private.h"
106 #include <sys/types.h>
108 #include <sys/wait.h>
109 #endif /* HAVE_FORK */
112 #include "gst-i18n-lib.h"
113 #include <locale.h> /* for LC_ALL */
117 #define GST_CAT_DEFAULT GST_CAT_GST_INIT
119 #define MAX_PATH_SPLIT 16
120 #define GST_PLUGIN_SEPARATOR ","
122 static gboolean gst_initialized = FALSE;
124 #ifndef GST_DISABLE_REGISTRY
125 static GList *plugin_paths = NULL; /* for delayed processing in post_init */
128 extern gint _gst_trace_on;
132 #define DEFAULT_FORK TRUE;
134 #define DEFAULT_FORK FALSE;
135 #endif /* HAVE_FORK */
137 /* set to TRUE when segfaults need to be left as is, FIXME, this variable is
139 gboolean _gst_disable_segtrap = FALSE;
141 /* control the behaviour of registry rebuild */
142 static gboolean _gst_enable_registry_fork = DEFAULT_FORK;
144 static void load_plugin_func (gpointer data, gpointer user_data);
145 static gboolean init_pre (void);
146 static gboolean init_post (void);
147 static gboolean parse_goption_arg (const gchar * s_opt,
148 const gchar * arg, gpointer data, GError ** err);
150 static GSList *preload_plugins = NULL;
152 const gchar g_log_domain_gstreamer[] = "GStreamer";
155 debug_log_handler (const gchar * log_domain,
156 GLogLevelFlags log_level, const gchar * message, gpointer user_data)
158 g_log_default_handler (log_domain, log_level, message, user_data);
159 /* FIXME: do we still need this ? fatal errors these days are all
160 * other than core errors */
161 /* g_on_error_query (NULL); */
168 #ifndef GST_DISABLE_GST_DEBUG
179 ARG_REGISTRY_FORK_DISABLE
182 /* debug-spec ::= category-spec [, category-spec]*
183 * category-spec ::= category:val | val
192 #ifndef GST_DISABLE_GST_DEBUG
194 parse_debug_category (gchar * str, const gchar ** category)
211 parse_debug_level (gchar * str, gint * level)
219 if (str[0] != NUL && str[1] == NUL
220 && str[0] >= '0' && str[0] < '0' + GST_LEVEL_COUNT) {
221 *level = str[0] - '0';
229 parse_debug_list (const gchar * list)
234 g_return_if_fail (list != NULL);
236 split = g_strsplit (list, ",", 0);
238 for (walk = split; *walk; walk++) {
239 if (strchr (*walk, ':')) {
240 gchar **values = g_strsplit (*walk, ":", 2);
242 if (values[0] && values[1]) {
244 const gchar *category;
246 if (parse_debug_category (values[0], &category)
247 && parse_debug_level (values[1], &level))
248 gst_debug_set_threshold_for_name (category, level);
255 if (parse_debug_level (*walk, &level))
256 gst_debug_set_default_threshold (level);
265 * gst_init_get_option_group:
267 * Returns a #GOptionGroup with GStreamer's argument specifications. The
268 * group is set up to use standard GOption callbacks, so when using this
269 * group in combination with GOption parsing methods, all argument parsing
270 * and initialization is automated.
272 * This function is useful if you want to integrate GStreamer with other
273 * libraries that use GOption (see g_option_context_add_group() ).
275 * Returns: a pointer to GStreamer's option group. Should be dereferenced
280 gst_init_get_option_group (void)
283 const static GOptionEntry gst_args[] = {
284 {"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
285 parse_goption_arg, N_("Print the GStreamer version"), NULL},
286 {"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
287 parse_goption_arg, N_("Make all warnings fatal"), NULL},
288 #ifndef GST_DISABLE_GST_DEBUG
289 {"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
290 parse_goption_arg, N_("Print available debug categories and exit"),
292 {"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK, parse_goption_arg,
293 N_("Default debug level from 1 (only error) to 5 (anything) or "
296 {"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, parse_goption_arg,
297 N_("Comma-separated list of category_name:level pairs to set "
298 "specific levels for the individual categories. Example: "
299 "GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
301 {"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
302 parse_goption_arg, N_("Disable colored debugging output"), NULL},
303 {"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
304 parse_goption_arg, N_("Disable debugging"), NULL},
306 {"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
307 parse_goption_arg, N_("Enable verbose plugin loading diagnostics"),
309 {"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK, parse_goption_arg,
310 N_("Colon-separated paths containing plugins"), N_("PATHS")},
311 {"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK, parse_goption_arg,
312 N_("Comma-separated list of plugins to preload in addition to the "
313 "list stored in environment variable GST_PLUGIN_PATH"),
315 {"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
317 N_("Disable trapping of segmentation faults during plugin loading"),
319 {"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
320 G_OPTION_ARG_CALLBACK,
322 N_("Disable the use of fork() while scanning the registry"),
327 group = g_option_group_new ("gst", _("GStreamer Options"),
328 _("Show GStreamer Options"), NULL, NULL);
329 g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
330 (GOptionParseFunc) init_post);
332 g_option_group_add_entries (group, gst_args);
333 g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
340 * @argc: pointer to application's argc
341 * @argv: pointer to application's argv
342 * @err: pointer to a #GError to which a message will be posted on error
344 * Initializes the GStreamer library, setting up internal path lists,
345 * registering built-in elements, and loading standard plugins.
347 * This function will return %FALSE if GStreamer could not be initialized
348 * for some reason. If you want your program to fail fatally,
349 * use gst_init() instead.
351 * Returns: %TRUE if GStreamer could be initialized.
354 gst_init_check (int *argc, char **argv[], GError ** err)
360 GST_INFO ("initializing GStreamer");
362 if (gst_initialized) {
363 GST_DEBUG ("already initialized gst");
367 ctx = g_option_context_new ("- GStreamer initialization");
368 g_option_context_set_ignore_unknown_options (ctx, TRUE);
369 group = gst_init_get_option_group ();
370 g_option_context_add_group (ctx, group);
371 res = g_option_context_parse (ctx, argc, argv, err);
372 g_option_context_free (ctx);
374 gst_initialized = res;
377 GST_INFO ("initialized GStreamer successfully");
379 GST_INFO ("failed to initialize GStreamer");
387 * @argc: pointer to application's argc
388 * @argv: pointer to application's argv
390 * Initializes the GStreamer library, setting up internal path lists,
391 * registering built-in elements, and loading standard plugins.
394 * This function will terminate your program if it was unable to initialize
395 * GStreamer for some reason. If you want your program to fall back,
396 * use gst_init_check() instead.
399 * WARNING: This function does not work in the same way as corresponding
400 * functions in other glib-style libraries, such as gtk_init(). In
401 * particular, unknown command line options cause this function to
402 * abort program execution.
405 gst_init (int *argc, char **argv[])
409 if (!gst_init_check (argc, argv, &err)) {
410 g_print ("Could not initialize GStreamer: %s\n",
411 err ? err->message : "unknown error occurred");
419 #ifndef GST_DISABLE_REGISTRY
421 add_path_func (gpointer data, gpointer user_data)
423 GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
424 plugin_paths = g_list_append (plugin_paths, g_strdup (data));
429 prepare_for_load_plugin_func (gpointer data, gpointer user_data)
431 preload_plugins = g_slist_prepend (preload_plugins, g_strdup (data));
435 load_plugin_func (gpointer data, gpointer user_data)
438 const gchar *filename;
441 filename = (const gchar *) data;
443 plugin = gst_plugin_load_file (filename, &err);
446 GST_INFO ("Loaded plugin: \"%s\"", filename);
448 gst_default_registry_add_plugin (plugin);
451 /* Report error to user, and free error */
452 GST_ERROR ("Failed to load plugin: %s\n", err->message);
455 GST_WARNING ("Failed to load plugin: \"%s\"", filename);
463 split_and_iterate (const gchar * stringlist, gchar * separator, GFunc iterator,
468 gchar *lastlist = g_strdup (stringlist);
471 strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
476 iterator (strings[j], user_data);
477 if (++j == MAX_PATH_SPLIT) {
478 lastlist = g_strdup (strings[j]);
483 g_strfreev (strings);
487 /* we have no fail cases yet, but maybe in the future */
491 /* GStreamer was built against a GLib >= 2.8 and is therefore not doing
492 * the refcount hack. Check that it isn't being run against an older GLib */
493 if (glib_major_version < 2 ||
494 (glib_major_version == 2 && glib_minor_version < 8)) {
495 g_warning ("GStreamer was compiled against GLib %d.%d.%d but is running"
496 " against %d.%d.%d. This will cause reference counting issues",
497 GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION,
498 glib_major_version, glib_minor_version, glib_micro_version);
503 if (g_thread_supported ()) {
504 /* somebody already initialized threading */
506 g_thread_init (NULL);
508 /* we need threading to be enabled right here */
512 setlocale (LC_ALL, "");
513 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
514 #endif /* ENABLE_NLS */
516 #ifndef GST_DISABLE_GST_DEBUG
518 const gchar *debug_list;
520 if (g_getenv ("GST_DEBUG_NO_COLOR") != NULL)
521 gst_debug_set_colored (FALSE);
523 debug_list = g_getenv ("GST_DEBUG");
525 parse_debug_list (debug_list);
529 /* This is the earliest we can make stuff show up in the logs.
530 * So give some useful info about GStreamer here */
531 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
532 GST_INFO ("Using library installed in %s", LIBDIR);
538 gst_register_core_elements (GstPlugin * plugin)
540 /* register some standard builtin types */
541 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
543 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
546 g_assert_not_reached ();
551 static GstPluginDesc plugin_desc = {
555 "core elements linked into the GStreamer library",
556 gst_register_core_elements,
566 #ifndef GST_DISABLE_REGISTRY
569 scan_and_update_registry (GstRegistry * default_registry,
570 const gchar * registry_file, gboolean write_changes)
572 const gchar *plugin_path;
573 gboolean changed = FALSE;
576 GST_DEBUG ("reading registry cache: %s", registry_file);
577 gst_registry_xml_read_cache (default_registry, registry_file);
579 /* scan paths specified via --gst-plugin-path */
580 GST_DEBUG ("scanning paths added via --gst-plugin-path");
581 for (l = plugin_paths; l != NULL; l = l->next) {
582 GST_INFO ("Scanning plugin path: \"%s\"", (gchar *) l->data);
583 /* CHECKME: add changed |= here as well? */
584 gst_registry_scan_path (default_registry, (gchar *) l->data);
587 g_list_free (plugin_paths);
590 /* GST_PLUGIN_PATH specifies a list of directories to scan for
591 * additional plugins. These take precedence over the system plugins */
592 plugin_path = g_getenv ("GST_PLUGIN_PATH");
597 GST_DEBUG ("GST_PLUGIN_PATH set to %s", plugin_path);
598 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
599 for (i = 0; list[i]; i++) {
600 changed |= gst_registry_scan_path (default_registry, list[i]);
604 GST_DEBUG ("GST_PLUGIN_PATH not set");
607 /* GST_PLUGIN_SYSTEM_PATH specifies a list of plugins that are always
608 * loaded by default. If not set, this defaults to the system-installed
609 * path, and the plugins installed in the user's home directory */
610 plugin_path = g_getenv ("GST_PLUGIN_SYSTEM_PATH");
611 if (plugin_path == NULL) {
614 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH not set");
616 /* plugins in the user's home directory take precedence over
617 * system-installed ones */
618 home_plugins = g_build_filename (g_get_home_dir (),
619 ".gstreamer-" GST_MAJORMINOR, "plugins", NULL);
620 changed |= gst_registry_scan_path (default_registry, home_plugins);
621 g_free (home_plugins);
623 /* add the main (installed) library path */
624 changed |= gst_registry_scan_path (default_registry, PLUGINDIR);
629 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path);
630 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
631 for (i = 0; list[i]; i++) {
632 changed |= gst_registry_scan_path (default_registry, list[i]);
638 GST_DEBUG ("registry cache has not changed");
642 if (!write_changes) {
643 GST_DEBUG ("not trying to write registry cache changes to file");
647 GST_DEBUG ("writing registry cache");
648 if (!gst_registry_xml_write_cache (default_registry, registry_file)) {
649 g_warning ("Problem writing registry cache to %s: %s", registry_file,
654 GST_DEBUG ("registry cache written successfully");
659 ensure_current_registry_nonforking (GstRegistry * default_registry,
660 const gchar * registry_file)
662 /* fork() not available */
663 GST_DEBUG ("updating registry cache");
664 scan_and_update_registry (default_registry, registry_file, TRUE);
668 /* when forking is not available this function always does nothing but return
671 ensure_current_registry_forking (GstRegistry * default_registry,
672 const gchar * registry_file)
677 /* We fork here, and let the child read and possibly rebuild the registry.
678 * After that, the parent will re-read the freshly generated registry. */
679 GST_DEBUG ("forking");
682 GST_ERROR ("Failed to fork()");
689 /* this is the child */
690 GST_DEBUG ("child reading registry cache");
691 res = scan_and_update_registry (default_registry, registry_file, TRUE);
692 _gst_registry_remove_cache_plugins (default_registry);
694 /* need to use _exit, so that any exit handlers registered don't
695 * bring down the main program */
696 GST_DEBUG ("child exiting: %s", (res) ? "SUCCESS" : "FAILURE");
698 /* make valgrind happy (yes, you can call it insane) */
699 g_free ((char *) registry_file);
701 _exit ((res) ? EXIT_SUCCESS : EXIT_FAILURE);
707 GST_DEBUG ("parent waiting on child");
708 ret = waitpid (pid, &status, 0);
709 GST_DEBUG ("parent done waiting on child");
711 GST_ERROR ("error during waitpid: %s", g_strerror (errno));
715 if (!WIFEXITED (status)) {
716 GST_ERROR ("child did not exit normally, status: %d", status);
720 GST_DEBUG ("child exited normally with return value %d",
721 WEXITSTATUS (status));
723 if (WEXITSTATUS (status) == EXIT_SUCCESS) {
724 GST_DEBUG ("parent reading registry cache");
725 gst_registry_xml_read_cache (default_registry, registry_file);
727 GST_DEBUG ("parent re-scanning registry");
728 scan_and_update_registry (default_registry, registry_file, FALSE);
731 #endif /* HAVE_FORK */
736 ensure_current_registry (void)
739 GstRegistry *default_registry;
743 default_registry = gst_registry_get_default ();
744 registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
745 if (registry_file == NULL) {
746 registry_file = g_build_filename (g_get_home_dir (),
747 ".gstreamer-" GST_MAJORMINOR, "registry." HOST_CPU ".xml", NULL);
750 /* first see if forking is enabled */
751 do_fork = _gst_enable_registry_fork;
753 const gchar *fork_env;
755 /* forking enabled, see if it is disabled with an env var */
756 if ((fork_env = g_getenv ("GST_REGISTRY_FORK"))) {
757 /* fork enabled for any value different from "no" */
758 do_fork = strcmp (fork_env, "no") != 0;
762 /* now check registry with or without forking */
764 GST_DEBUG ("forking for registry rebuild");
765 ret = ensure_current_registry_forking (default_registry, registry_file);
767 GST_DEBUG ("requested not to fork for registry rebuild");
768 ret = ensure_current_registry_nonforking (default_registry, registry_file);
771 g_free (registry_file);
775 #endif /* GST_DISABLE_REGISTRY */
779 * - initalization of threads if we use them
782 * - initializes gst_format
783 * - registers a bunch of types for gst_objects
785 * - we don't have cases yet where this fails, but in the future
786 * we might and then it's nice to be able to return that
793 #ifndef GST_DISABLE_TRACE
795 #endif /* GST_DISABLE_TRACE */
797 llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
798 g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
800 _priv_gst_quarks_initialize ();
801 _gst_format_initialize ();
802 _gst_query_initialize ();
803 gst_object_get_type ();
805 gst_element_factory_get_type ();
806 gst_element_get_type ();
807 gst_type_find_factory_get_type ();
810 #ifndef GST_DISABLE_INDEX
811 gst_index_factory_get_type ();
812 #endif /* GST_DISABLE_INDEX */
813 #ifndef GST_DISABLE_URI
814 gst_uri_handler_get_type ();
815 #endif /* GST_DISABLE_URI */
817 gst_structure_get_type ();
818 _gst_value_initialize ();
819 gst_caps_get_type ();
820 _gst_event_initialize ();
821 _gst_buffer_initialize ();
822 _gst_message_initialize ();
823 _gst_tag_initialize ();
825 /* register core plugins */
826 _gst_plugin_register_static (&plugin_desc);
828 _gst_plugin_initialize ();
831 * Any errors happening below this point are non-fatal, we therefore mark
832 * gstreamer as being initialized, since it is the case from a plugin point of
835 * If anything fails, it will be put back to FALSE in gst_init_check().
836 * This allows some special plugins that would call gst_init() to not cause a
837 * looping effect (i.e. initializing GStreamer twice).
839 gst_initialized = TRUE;
841 #ifndef GST_DISABLE_REGISTRY
842 if (!ensure_current_registry ())
844 #endif /* GST_DISABLE_REGISTRY */
846 /* if we need to preload plugins */
847 if (preload_plugins) {
848 g_slist_foreach (preload_plugins, load_plugin_func, NULL);
849 g_slist_free (preload_plugins);
850 preload_plugins = NULL;
852 #ifndef GST_DISABLE_TRACE
855 gst_trace = gst_trace_new ("gst.trace", 1024);
856 gst_trace_set_default (gst_trace);
858 #endif /* GST_DISABLE_TRACE */
863 #ifndef GST_DISABLE_GST_DEBUG
865 select_all (GstPlugin * plugin, gpointer user_data)
871 sort_by_category_name (gconstpointer a, gconstpointer b)
873 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
874 gst_debug_category_get_name ((GstDebugCategory *) b));
877 gst_debug_help (void)
885 list2 = gst_registry_plugin_filter (gst_registry_get_default (),
886 select_all, FALSE, NULL);
888 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
889 for (g = list2; g; g = g_list_next (g)) {
890 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
892 gst_plugin_load (plugin);
896 list = gst_debug_get_all_categories ();
897 walk = list = g_slist_sort (list, sort_by_category_name);
900 g_print ("name level description\n");
901 g_print ("---------------------+--------+--------------------------------\n");
904 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
906 if (gst_debug_is_colored ()) {
907 gchar *color = gst_debug_construct_term_color (cat->color);
909 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
911 gst_debug_category_get_name (cat),
912 gst_debug_category_get_threshold (cat),
913 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
914 color, gst_debug_category_get_description (cat));
917 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
918 gst_debug_category_get_threshold (cat),
919 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
920 gst_debug_category_get_description (cat));
922 walk = g_slist_next (walk);
930 parse_one_option (gint opt, const gchar * arg, GError ** err)
934 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
936 case ARG_FATAL_WARNINGS:{
937 GLogLevelFlags fatal_mask;
939 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
940 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
941 g_log_set_always_fatal (fatal_mask);
944 #ifndef GST_DISABLE_GST_DEBUG
945 case ARG_DEBUG_LEVEL:{
948 tmp = strtol (arg, NULL, 0);
949 if (tmp >= 0 && tmp < GST_LEVEL_COUNT) {
950 gst_debug_set_default_threshold (tmp);
955 parse_debug_list (arg);
957 case ARG_DEBUG_NO_COLOR:
958 gst_debug_set_colored (FALSE);
960 case ARG_DEBUG_DISABLE:
961 gst_debug_set_active (FALSE);
967 case ARG_PLUGIN_SPEW:
969 case ARG_PLUGIN_PATH:
970 #ifndef GST_DISABLE_REGISTRY
971 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
972 #endif /* GST_DISABLE_REGISTRY */
974 case ARG_PLUGIN_LOAD:
975 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
977 case ARG_SEGTRAP_DISABLE:
978 _gst_disable_segtrap = TRUE;
980 case ARG_REGISTRY_FORK_DISABLE:
981 _gst_enable_registry_fork = FALSE;
984 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
985 _("Unknown option"));
993 parse_goption_arg (const gchar * opt,
994 const gchar * arg, gpointer data, GError ** err)
1002 "--gst-version", ARG_VERSION}, {
1003 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
1004 #ifndef GST_DISABLE_GST_DEBUG
1006 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
1007 "--gst-debug", ARG_DEBUG}, {
1008 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
1009 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
1010 "--gst-debug-help", ARG_DEBUG_HELP},
1013 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
1014 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
1015 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
1016 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
1017 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
1022 for (n = 0; options[n].opt; n++) {
1023 if (!strcmp (opt, options[n].opt)) {
1024 val = options[n].val;
1029 return parse_one_option (val, arg, err);
1032 extern GstRegistry *_gst_registry_default;
1037 * Clean up any resources created by GStreamer in gst_init().
1039 * It is normally not needed to call this function in a normal application
1040 * as the resources will automatically be freed when the program terminates.
1041 * This function is therefore mostly used by testsuites and other memory
1044 * After this call GStreamer (including this method) should not be used anymore.
1051 GST_INFO ("deinitializing GStreamer");
1053 if (!gst_initialized) {
1054 GST_DEBUG ("already deinitialized");
1058 clock = gst_system_clock_obtain ();
1059 gst_object_unref (clock);
1060 gst_object_unref (clock);
1062 _gst_registry_cleanup ();
1064 gst_initialized = FALSE;
1065 GST_INFO ("deinitialized GStreamer");
1070 * @major: pointer to a guint to store the major version number
1071 * @minor: pointer to a guint to store the minor version number
1072 * @micro: pointer to a guint to store the micro version number
1073 * @nano: pointer to a guint to store the nano version number
1075 * Gets the version number of the GStreamer library.
1078 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1080 g_return_if_fail (major);
1081 g_return_if_fail (minor);
1082 g_return_if_fail (micro);
1083 g_return_if_fail (nano);
1085 *major = GST_VERSION_MAJOR;
1086 *minor = GST_VERSION_MINOR;
1087 *micro = GST_VERSION_MICRO;
1088 *nano = GST_VERSION_NANO;
1092 * gst_version_string:
1094 * This function returns a string that is useful for describing this version
1095 * of GStreamer to the outside world: user agent strings, logging, ...
1097 * Returns: a newly allocated string describing this version of GStreamer.
1101 gst_version_string ()
1103 guint major, minor, micro, nano;
1105 gst_version (&major, &minor, µ, &nano);
1107 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1109 return g_strdup_printf ("GStreamer %d.%d.%d (CVS)", major, minor, micro);
1111 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1116 * gst_segtrap_is_enabled:
1118 * Some functions in the GStreamer core might install a custom SIGSEGV handler to
1119 * better catch and report errors to the application. Currently this feature is
1120 * enabled by default when loading plugins.
1122 * Applications might want to disable this behaviour with the
1123 * gst_segtrap_set_enabled() function. This is typically done if the application
1124 * wants to install its own handler without GStreamer interfering.
1126 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1131 gst_segtrap_is_enabled (void)
1133 /* yeps, it's enabled when it's not disabled */
1134 return !_gst_disable_segtrap;
1138 * gst_segtrap_set_enabled:
1139 * @enabled: whether a custom SIGSEGV handler should be installed.
1141 * Applications might want to disable/enable the SIGSEGV handling of
1142 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1147 gst_segtrap_set_enabled (gboolean enabled)
1149 _gst_disable_segtrap = !enabled;
1153 * gst_registry_fork_is_enabled:
1155 * By default GStreamer will perform a fork() when scanning and rebuilding the
1158 * Applications might want to disable this behaviour with the
1159 * gst_registry_fork_set_enabled() function.
1161 * Returns: %TRUE if GStreamer will use fork() when rebuilding the registry. On
1162 * platforms without fork(), this function will always return %FALSE.
1167 gst_registry_fork_is_enabled (void)
1169 return _gst_enable_registry_fork;
1173 * gst_registry_fork_set_enabled:
1174 * @enabled: whether rebuilding the registry may fork
1176 * Applications might want to disable/enable the usage of fork() when rebuilding
1177 * the registry. See gst_registry_fork_is_enabled() for more information.
1179 * On platforms without fork(), this function will have no effect on the return
1180 * value of gst_registry_fork_is_enabled().
1185 gst_registry_fork_set_enabled (gboolean enabled)
1188 _gst_enable_registry_fork = enabled;
1189 #endif /* HAVE_FORK */