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 */
110 #ifdef HAVE_SYS_UTSNAME_H
111 #include <sys/utsname.h>
117 #include "gst-i18n-lib.h"
118 #include <locale.h> /* for LC_ALL */
122 #define GST_CAT_DEFAULT GST_CAT_GST_INIT
124 #define MAX_PATH_SPLIT 16
125 #define GST_PLUGIN_SEPARATOR ","
127 static gboolean gst_initialized = FALSE;
129 #ifndef GST_DISABLE_REGISTRY
130 static GList *plugin_paths = NULL; /* for delayed processing in post_init */
133 extern gint _gst_trace_on;
137 #define DEFAULT_FORK TRUE
139 #define DEFAULT_FORK FALSE
140 #endif /* HAVE_FORK */
142 /* set to TRUE when segfaults need to be left as is, FIXME, this variable is
144 gboolean _gst_disable_segtrap = FALSE;
146 /* control the behaviour of registry rebuild */
147 static gboolean _gst_enable_registry_fork = DEFAULT_FORK;
149 static void load_plugin_func (gpointer data, gpointer user_data);
150 static gboolean init_pre (GOptionContext * context, GOptionGroup * group,
151 gpointer data, GError ** error);
152 static gboolean init_post (GOptionContext * context, GOptionGroup * group,
153 gpointer data, GError ** error);
154 static gboolean parse_goption_arg (const gchar * s_opt,
155 const gchar * arg, gpointer data, GError ** err);
157 static GSList *preload_plugins = NULL;
159 const gchar g_log_domain_gstreamer[] = "GStreamer";
162 debug_log_handler (const gchar * log_domain,
163 GLogLevelFlags log_level, const gchar * message, gpointer user_data)
165 g_log_default_handler (log_domain, log_level, message, user_data);
166 /* FIXME: do we still need this ? fatal errors these days are all
167 * other than core errors */
168 /* g_on_error_query (NULL); */
175 #ifndef GST_DISABLE_GST_DEBUG
186 ARG_REGISTRY_FORK_DISABLE
189 /* debug-spec ::= category-spec [, category-spec]*
190 * category-spec ::= category:val | val
199 #ifndef GST_DISABLE_GST_DEBUG
201 parse_debug_category (gchar * str, const gchar ** category)
218 parse_debug_level (gchar * str, gint * level)
226 if (str[0] != NUL && str[1] == NUL
227 && str[0] >= '0' && str[0] < '0' + GST_LEVEL_COUNT) {
228 *level = str[0] - '0';
236 parse_debug_list (const gchar * list)
241 g_return_if_fail (list != NULL);
243 split = g_strsplit (list, ",", 0);
245 for (walk = split; *walk; walk++) {
246 if (strchr (*walk, ':')) {
247 gchar **values = g_strsplit (*walk, ":", 2);
249 if (values[0] && values[1]) {
251 const gchar *category;
253 if (parse_debug_category (values[0], &category)
254 && parse_debug_level (values[1], &level))
255 gst_debug_set_threshold_for_name (category, level);
262 if (parse_debug_level (*walk, &level))
263 gst_debug_set_default_threshold (level);
272 * gst_init_get_option_group:
274 * Returns a #GOptionGroup with GStreamer's argument specifications. The
275 * group is set up to use standard GOption callbacks, so when using this
276 * group in combination with GOption parsing methods, all argument parsing
277 * and initialization is automated.
279 * This function is useful if you want to integrate GStreamer with other
280 * libraries that use GOption (see g_option_context_add_group() ).
282 * Returns: a pointer to GStreamer's option group. Should be dereferenced
287 gst_init_get_option_group (void)
290 const static GOptionEntry gst_args[] = {
291 {"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
292 (gpointer) parse_goption_arg, N_("Print the GStreamer version"), NULL},
293 {"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
294 (gpointer) parse_goption_arg, N_("Make all warnings fatal"), NULL},
295 #ifndef GST_DISABLE_GST_DEBUG
296 {"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
297 (gpointer) parse_goption_arg,
298 N_("Print available debug categories and exit"),
300 {"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK,
301 (gpointer) parse_goption_arg,
302 N_("Default debug level from 1 (only error) to 5 (anything) or "
305 {"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) parse_goption_arg,
306 N_("Comma-separated list of category_name:level pairs to set "
307 "specific levels for the individual categories. Example: "
308 "GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
310 {"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
311 (gpointer) parse_goption_arg, N_("Disable colored debugging output"),
313 {"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
314 (gpointer) parse_goption_arg, N_("Disable debugging"), NULL},
316 {"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
317 (gpointer) parse_goption_arg,
318 N_("Enable verbose plugin loading diagnostics"),
320 {"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK,
321 (gpointer) parse_goption_arg,
322 N_("Colon-separated paths containing plugins"), N_("PATHS")},
323 {"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK,
324 (gpointer) parse_goption_arg,
325 N_("Comma-separated list of plugins to preload in addition to the "
326 "list stored in environment variable GST_PLUGIN_PATH"),
328 {"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
329 (gpointer) parse_goption_arg,
330 N_("Disable trapping of segmentation faults during plugin loading"),
332 {"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
333 G_OPTION_ARG_CALLBACK,
334 (gpointer) parse_goption_arg,
335 N_("Disable the use of fork() while scanning the registry"),
340 group = g_option_group_new ("gst", _("GStreamer Options"),
341 _("Show GStreamer Options"), NULL, NULL);
342 g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
343 (GOptionParseFunc) init_post);
345 g_option_group_add_entries (group, gst_args);
346 g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
353 * @argc: pointer to application's argc
354 * @argv: pointer to application's argv
355 * @err: pointer to a #GError to which a message will be posted on error
357 * Initializes the GStreamer library, setting up internal path lists,
358 * registering built-in elements, and loading standard plugins.
360 * This function will return %FALSE if GStreamer could not be initialized
361 * for some reason. If you want your program to fail fatally,
362 * use gst_init() instead.
364 * Returns: %TRUE if GStreamer could be initialized.
367 gst_init_check (int *argc, char **argv[], GError ** err)
373 GST_INFO ("initializing GStreamer");
375 if (gst_initialized) {
376 GST_DEBUG ("already initialized gst");
380 ctx = g_option_context_new ("- GStreamer initialization");
381 g_option_context_set_ignore_unknown_options (ctx, TRUE);
382 group = gst_init_get_option_group ();
383 g_option_context_add_group (ctx, group);
384 res = g_option_context_parse (ctx, argc, argv, err);
385 g_option_context_free (ctx);
387 gst_initialized = res;
390 GST_INFO ("initialized GStreamer successfully");
392 GST_INFO ("failed to initialize GStreamer");
400 * @argc: pointer to application's argc
401 * @argv: pointer to application's argv
403 * Initializes the GStreamer library, setting up internal path lists,
404 * registering built-in elements, and loading standard plugins.
407 * This function will terminate your program if it was unable to initialize
408 * GStreamer for some reason. If you want your program to fall back,
409 * use gst_init_check() instead.
412 * WARNING: This function does not work in the same way as corresponding
413 * functions in other glib-style libraries, such as gtk_init(). In
414 * particular, unknown command line options cause this function to
415 * abort program execution.
418 gst_init (int *argc, char **argv[])
422 if (!gst_init_check (argc, argv, &err)) {
423 g_print ("Could not initialize GStreamer: %s\n",
424 err ? err->message : "unknown error occurred");
432 #ifndef GST_DISABLE_REGISTRY
434 add_path_func (gpointer data, gpointer user_data)
436 GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
437 plugin_paths = g_list_append (plugin_paths, g_strdup (data));
442 prepare_for_load_plugin_func (gpointer data, gpointer user_data)
444 preload_plugins = g_slist_prepend (preload_plugins, g_strdup (data));
448 load_plugin_func (gpointer data, gpointer user_data)
451 const gchar *filename;
454 filename = (const gchar *) data;
456 plugin = gst_plugin_load_file (filename, &err);
459 GST_INFO ("Loaded plugin: \"%s\"", filename);
461 gst_default_registry_add_plugin (plugin);
464 /* Report error to user, and free error */
465 GST_ERROR ("Failed to load plugin: %s\n", err->message);
468 GST_WARNING ("Failed to load plugin: \"%s\"", filename);
476 split_and_iterate (const gchar * stringlist, gchar * separator, GFunc iterator,
481 gchar *lastlist = g_strdup (stringlist);
484 strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
489 iterator (strings[j], user_data);
490 if (++j == MAX_PATH_SPLIT) {
491 lastlist = g_strdup (strings[j]);
496 g_strfreev (strings);
500 /* we have no fail cases yet, but maybe in the future */
502 init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
505 if (gst_initialized) {
506 GST_DEBUG ("already initialized");
510 /* GStreamer was built against a GLib >= 2.8 and is therefore not doing
511 * the refcount hack. Check that it isn't being run against an older GLib */
512 if (glib_major_version < 2 ||
513 (glib_major_version == 2 && glib_minor_version < 8)) {
514 g_warning ("GStreamer was compiled against GLib %d.%d.%d but is running"
515 " against %d.%d.%d. This will cause reference counting issues",
516 GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION,
517 glib_major_version, glib_minor_version, glib_micro_version);
522 if (g_thread_supported ()) {
523 /* somebody already initialized threading */
525 g_thread_init (NULL);
527 /* we need threading to be enabled right here */
531 setlocale (LC_ALL, "");
532 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
533 #endif /* ENABLE_NLS */
535 #ifndef GST_DISABLE_GST_DEBUG
537 const gchar *debug_list;
539 if (g_getenv ("GST_DEBUG_NO_COLOR") != NULL)
540 gst_debug_set_colored (FALSE);
542 debug_list = g_getenv ("GST_DEBUG");
544 parse_debug_list (debug_list);
548 /* This is the earliest we can make stuff show up in the logs.
549 * So give some useful info about GStreamer here */
550 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
551 GST_INFO ("Using library installed in %s", LIBDIR);
553 /* Print some basic system details if possible (OS/architecture) */
554 #ifdef HAVE_SYS_UTSNAME_H
556 struct utsname sys_details;
558 if (uname (&sys_details) == 0) {
559 GST_INFO ("%s %s %s %s %s", sys_details.sysname,
560 sys_details.nodename, sys_details.release, sys_details.version,
561 sys_details.machine);
570 gst_register_core_elements (GstPlugin * plugin)
572 /* register some standard builtin types */
573 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
575 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
578 g_assert_not_reached ();
583 static GstPluginDesc plugin_desc = {
587 "core elements linked into the GStreamer library",
588 gst_register_core_elements,
598 #ifndef GST_DISABLE_REGISTRY
601 * scan_and_update_registry:
602 * @default_registry: the #GstRegistry
603 * @registry_file: registry filename
604 * @write_changes: write registry if it has changed?
606 * Scans for registry changes and eventually updates the registry cache.
608 * Return: %TRUE if the registry could be updated
611 scan_and_update_registry (GstRegistry * default_registry,
612 const gchar * registry_file, gboolean write_changes, GError ** error)
614 const gchar *plugin_path;
615 gboolean changed = FALSE;
618 GST_DEBUG ("reading registry cache: %s", registry_file);
619 gst_registry_xml_read_cache (default_registry, registry_file);
621 /* scan paths specified via --gst-plugin-path */
622 GST_DEBUG ("scanning paths added via --gst-plugin-path");
623 for (l = plugin_paths; l != NULL; l = l->next) {
624 GST_INFO ("Scanning plugin path: \"%s\"", (gchar *) l->data);
625 /* CHECKME: add changed |= here as well? */
626 gst_registry_scan_path (default_registry, (gchar *) l->data);
629 g_list_free (plugin_paths);
632 /* GST_PLUGIN_PATH specifies a list of directories to scan for
633 * additional plugins. These take precedence over the system plugins */
634 plugin_path = g_getenv ("GST_PLUGIN_PATH");
639 GST_DEBUG ("GST_PLUGIN_PATH set to %s", plugin_path);
640 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
641 for (i = 0; list[i]; i++) {
642 changed |= gst_registry_scan_path (default_registry, list[i]);
646 GST_DEBUG ("GST_PLUGIN_PATH not set");
649 /* GST_PLUGIN_SYSTEM_PATH specifies a list of plugins that are always
650 * loaded by default. If not set, this defaults to the system-installed
651 * path, and the plugins installed in the user's home directory */
652 plugin_path = g_getenv ("GST_PLUGIN_SYSTEM_PATH");
653 if (plugin_path == NULL) {
656 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH not set");
658 /* plugins in the user's home directory take precedence over
659 * system-installed ones */
660 home_plugins = g_build_filename (g_get_home_dir (),
661 ".gstreamer-" GST_MAJORMINOR, "plugins", NULL);
662 changed |= gst_registry_scan_path (default_registry, home_plugins);
663 g_free (home_plugins);
665 /* add the main (installed) library path */
666 changed |= gst_registry_scan_path (default_registry, PLUGINDIR);
671 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path);
672 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
673 for (i = 0; list[i]; i++) {
674 changed |= gst_registry_scan_path (default_registry, list[i]);
679 /* Remove cached plugins so stale info is cleared. */
680 changed |= _priv_gst_registry_remove_cache_plugins (default_registry);
683 GST_INFO ("Registry cache has not changed");
687 if (!write_changes) {
688 GST_INFO ("Registry cached changed, but writing is disabled. Not writing.");
692 GST_INFO ("Registry cache changed. Writing new registry cache");
693 if (!gst_registry_xml_write_cache (default_registry, registry_file)) {
694 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
695 _("Error writing registry cache to %s: %s"),
696 registry_file, g_strerror (errno));
700 GST_INFO ("Registry cache written successfully");
705 ensure_current_registry_nonforking (GstRegistry * default_registry,
706 const gchar * registry_file, GError ** error)
708 /* fork() not available */
709 GST_DEBUG ("Updating registry cache in-process");
710 scan_and_update_registry (default_registry, registry_file, TRUE, error);
714 /* when forking is not available this function always does nothing but return
717 ensure_current_registry_forking (GstRegistry * default_registry,
718 const gchar * registry_file, GError ** error)
725 /* We fork here, and let the child read and possibly rebuild the registry.
726 * After that, the parent will re-read the freshly generated registry. */
727 GST_DEBUG ("forking to update registry");
729 if (pipe (pfd) == -1) {
730 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
731 _("Error re-scanning registry %s: %s"),
732 ", could not create pipes. Error", g_strerror (errno));
738 GST_ERROR ("Failed to fork()");
739 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
740 _("Error re-scanning registry %s: %s"),
741 ", failed to fork. Error", g_strerror (errno));
749 /* this is the child. Close the read pipe */
750 (void) close (pfd[0]);
752 GST_DEBUG ("child reading registry cache");
754 scan_and_update_registry (default_registry, registry_file, TRUE, NULL);
756 /* need to use _exit, so that any exit handlers registered don't
757 * bring down the main program */
758 GST_DEBUG ("child exiting: %s", (res) ? "SUCCESS" : "FAILURE");
760 /* make valgrind happy (yes, you can call it insane) */
761 g_free ((char *) registry_file);
763 /* write a result byte to the pipe */
764 res_byte = res ? '1' : '0';
766 ret = write (pfd[1], &res_byte, 1);
767 } while (ret == -1 && errno == EINTR);
768 /* if ret == -1 now, we could not write to pipe, probably
769 * means parent has exited before us */
770 (void) close (pfd[1]);
776 /* parent. Close write pipe */
777 (void) close (pfd[1]);
779 /* Wait for result from the pipe */
780 GST_DEBUG ("Waiting for data from child");
782 ret = read (pfd[0], &res_byte, 1);
783 } while (ret == -1 && errno == EINTR);
786 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
787 _("Error re-scanning registry %s: %s"),
788 ", read returned error", g_strerror (errno));
792 (void) close (pfd[0]);
794 /* Wait to ensure the child is reaped, but ignore the result */
795 GST_DEBUG ("parent waiting on child");
796 waitpid (pid, NULL, 0);
797 GST_DEBUG ("parent done waiting on child");
800 GST_ERROR ("child did not exit normally, terminated by signal");
801 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
802 _("Error re-scanning registry %s"), ", child terminated by signal");
806 if (res_byte == '1') {
807 GST_DEBUG ("Child succeeded. Parent reading registry cache");
808 gst_registry_xml_read_cache (default_registry, registry_file);
810 GST_DEBUG ("Child failed. Parent re-scanning registry, ignoring errors.");
811 scan_and_update_registry (default_registry, registry_file, FALSE, NULL);
814 #endif /* HAVE_FORK */
819 ensure_current_registry (GError ** error)
822 GstRegistry *default_registry;
826 default_registry = gst_registry_get_default ();
827 registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
828 if (registry_file == NULL) {
829 registry_file = g_build_filename (g_get_home_dir (),
830 ".gstreamer-" GST_MAJORMINOR, "registry." HOST_CPU ".xml", NULL);
833 /* first see if forking is enabled */
834 do_fork = _gst_enable_registry_fork;
836 const gchar *fork_env;
838 /* forking enabled, see if it is disabled with an env var */
839 if ((fork_env = g_getenv ("GST_REGISTRY_FORK"))) {
840 /* fork enabled for any value different from "no" */
841 do_fork = strcmp (fork_env, "no") != 0;
845 /* now check registry with or without forking */
847 GST_DEBUG ("forking for registry rebuild");
848 ret = ensure_current_registry_forking (default_registry, registry_file,
851 GST_DEBUG ("requested not to fork for registry rebuild");
852 ret = ensure_current_registry_nonforking (default_registry, registry_file,
856 g_free (registry_file);
860 #endif /* GST_DISABLE_REGISTRY */
864 * - initalization of threads if we use them
867 * - initializes gst_format
868 * - registers a bunch of types for gst_objects
870 * - we don't have cases yet where this fails, but in the future
871 * we might and then it's nice to be able to return that
874 init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
879 #ifndef GST_DISABLE_TRACE
881 #endif /* GST_DISABLE_TRACE */
883 if (gst_initialized) {
884 GST_DEBUG ("already initialized");
888 llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
889 g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
891 _priv_gst_quarks_initialize ();
892 _gst_format_initialize ();
893 _gst_query_initialize ();
894 gst_object_get_type ();
896 gst_element_factory_get_type ();
897 gst_element_get_type ();
898 gst_type_find_factory_get_type ();
901 #ifndef GST_DISABLE_INDEX
902 gst_index_factory_get_type ();
903 #endif /* GST_DISABLE_INDEX */
904 #ifndef GST_DISABLE_URI
905 gst_uri_handler_get_type ();
906 #endif /* GST_DISABLE_URI */
908 gst_structure_get_type ();
909 _gst_value_initialize ();
910 gst_caps_get_type ();
911 _gst_event_initialize ();
912 _gst_buffer_initialize ();
913 _gst_message_initialize ();
914 _gst_tag_initialize ();
916 /* register core plugins */
917 _gst_plugin_register_static (&plugin_desc);
919 _gst_plugin_initialize ();
922 * Any errors happening below this point are non-fatal, we therefore mark
923 * gstreamer as being initialized, since it is the case from a plugin point of
926 * If anything fails, it will be put back to FALSE in gst_init_check().
927 * This allows some special plugins that would call gst_init() to not cause a
928 * looping effect (i.e. initializing GStreamer twice).
930 gst_initialized = TRUE;
932 #ifndef GST_DISABLE_REGISTRY
933 if (!ensure_current_registry (error))
935 #endif /* GST_DISABLE_REGISTRY */
937 /* if we need to preload plugins */
938 if (preload_plugins) {
939 g_slist_foreach (preload_plugins, load_plugin_func, NULL);
940 g_slist_free (preload_plugins);
941 preload_plugins = NULL;
943 #ifndef GST_DISABLE_TRACE
946 gst_trace = gst_trace_new ("gst.trace", 1024);
947 gst_trace_set_default (gst_trace);
949 #endif /* GST_DISABLE_TRACE */
954 #ifndef GST_DISABLE_GST_DEBUG
956 select_all (GstPlugin * plugin, gpointer user_data)
962 sort_by_category_name (gconstpointer a, gconstpointer b)
964 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
965 gst_debug_category_get_name ((GstDebugCategory *) b));
968 gst_debug_help (void)
973 /* Need to ensure the registry is loaded to get debug categories */
974 if (!init_post (NULL, NULL, NULL, NULL))
977 list2 = gst_registry_plugin_filter (gst_registry_get_default (),
978 select_all, FALSE, NULL);
980 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
981 for (g = list2; g; g = g_list_next (g)) {
982 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
984 gst_plugin_load (plugin);
988 list = gst_debug_get_all_categories ();
989 walk = list = g_slist_sort (list, sort_by_category_name);
992 g_print ("name level description\n");
993 g_print ("---------------------+--------+--------------------------------\n");
996 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
998 if (gst_debug_is_colored ()) {
999 gchar *color = gst_debug_construct_term_color (cat->color);
1001 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
1003 gst_debug_category_get_name (cat),
1004 gst_debug_category_get_threshold (cat),
1005 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
1006 color, gst_debug_category_get_description (cat));
1009 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
1010 gst_debug_category_get_threshold (cat),
1011 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
1012 gst_debug_category_get_description (cat));
1014 walk = g_slist_next (walk);
1016 g_slist_free (list);
1022 parse_one_option (gint opt, const gchar * arg, GError ** err)
1026 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
1028 case ARG_FATAL_WARNINGS:{
1029 GLogLevelFlags fatal_mask;
1031 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
1032 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
1033 g_log_set_always_fatal (fatal_mask);
1036 #ifndef GST_DISABLE_GST_DEBUG
1037 case ARG_DEBUG_LEVEL:{
1040 tmp = strtol (arg, NULL, 0);
1041 if (tmp >= 0 && tmp < GST_LEVEL_COUNT) {
1042 gst_debug_set_default_threshold (tmp);
1047 parse_debug_list (arg);
1049 case ARG_DEBUG_NO_COLOR:
1050 gst_debug_set_colored (FALSE);
1052 case ARG_DEBUG_DISABLE:
1053 gst_debug_set_active (FALSE);
1055 case ARG_DEBUG_HELP:
1059 case ARG_PLUGIN_SPEW:
1061 case ARG_PLUGIN_PATH:
1062 #ifndef GST_DISABLE_REGISTRY
1063 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
1064 #endif /* GST_DISABLE_REGISTRY */
1066 case ARG_PLUGIN_LOAD:
1067 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
1069 case ARG_SEGTRAP_DISABLE:
1070 _gst_disable_segtrap = TRUE;
1072 case ARG_REGISTRY_FORK_DISABLE:
1073 _gst_enable_registry_fork = FALSE;
1076 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
1077 _("Unknown option"));
1085 parse_goption_arg (const gchar * opt,
1086 const gchar * arg, gpointer data, GError ** err)
1094 "--gst-version", ARG_VERSION}, {
1095 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
1096 #ifndef GST_DISABLE_GST_DEBUG
1098 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
1099 "--gst-debug", ARG_DEBUG}, {
1100 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
1101 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
1102 "--gst-debug-help", ARG_DEBUG_HELP},
1105 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
1106 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
1107 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
1108 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
1109 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
1114 for (n = 0; options[n].opt; n++) {
1115 if (!strcmp (opt, options[n].opt)) {
1116 val = options[n].val;
1121 return parse_one_option (val, arg, err);
1124 extern GstRegistry *_gst_registry_default;
1129 * Clean up any resources created by GStreamer in gst_init().
1131 * It is normally not needed to call this function in a normal application
1132 * as the resources will automatically be freed when the program terminates.
1133 * This function is therefore mostly used by testsuites and other memory
1136 * After this call GStreamer (including this method) should not be used anymore.
1143 GST_INFO ("deinitializing GStreamer");
1145 if (!gst_initialized) {
1146 GST_DEBUG ("already deinitialized");
1150 clock = gst_system_clock_obtain ();
1151 gst_object_unref (clock);
1152 gst_object_unref (clock);
1154 _priv_gst_registry_cleanup ();
1156 gst_initialized = FALSE;
1157 GST_INFO ("deinitialized GStreamer");
1162 * @major: pointer to a guint to store the major version number
1163 * @minor: pointer to a guint to store the minor version number
1164 * @micro: pointer to a guint to store the micro version number
1165 * @nano: pointer to a guint to store the nano version number
1167 * Gets the version number of the GStreamer library.
1170 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1172 g_return_if_fail (major);
1173 g_return_if_fail (minor);
1174 g_return_if_fail (micro);
1175 g_return_if_fail (nano);
1177 *major = GST_VERSION_MAJOR;
1178 *minor = GST_VERSION_MINOR;
1179 *micro = GST_VERSION_MICRO;
1180 *nano = GST_VERSION_NANO;
1184 * gst_version_string:
1186 * This function returns a string that is useful for describing this version
1187 * of GStreamer to the outside world: user agent strings, logging, ...
1189 * Returns: a newly allocated string describing this version of GStreamer.
1193 gst_version_string ()
1195 guint major, minor, micro, nano;
1197 gst_version (&major, &minor, µ, &nano);
1199 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1201 return g_strdup_printf ("GStreamer %d.%d.%d (CVS)", major, minor, micro);
1203 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1208 * gst_segtrap_is_enabled:
1210 * Some functions in the GStreamer core might install a custom SIGSEGV handler
1211 * to better catch and report errors to the application. Currently this feature
1212 * is enabled by default when loading plugins.
1214 * Applications might want to disable this behaviour with the
1215 * gst_segtrap_set_enabled() function. This is typically done if the application
1216 * wants to install its own handler without GStreamer interfering.
1218 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1223 gst_segtrap_is_enabled (void)
1225 /* yeps, it's enabled when it's not disabled */
1226 return !_gst_disable_segtrap;
1230 * gst_segtrap_set_enabled:
1231 * @enabled: whether a custom SIGSEGV handler should be installed.
1233 * Applications might want to disable/enable the SIGSEGV handling of
1234 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1239 gst_segtrap_set_enabled (gboolean enabled)
1241 _gst_disable_segtrap = !enabled;
1245 * gst_registry_fork_is_enabled:
1247 * By default GStreamer will perform a fork() when scanning and rebuilding the
1250 * Applications might want to disable this behaviour with the
1251 * gst_registry_fork_set_enabled() function.
1253 * Returns: %TRUE if GStreamer will use fork() when rebuilding the registry. On
1254 * platforms without fork(), this function will always return %FALSE.
1259 gst_registry_fork_is_enabled (void)
1261 return _gst_enable_registry_fork;
1265 * gst_registry_fork_set_enabled:
1266 * @enabled: whether rebuilding the registry may fork
1268 * Applications might want to disable/enable the usage of fork() when rebuilding
1269 * the registry. See gst_registry_fork_is_enabled() for more information.
1271 * On platforms without fork(), this function will have no effect on the return
1272 * value of gst_registry_fork_is_enabled().
1277 gst_registry_fork_set_enabled (gboolean enabled)
1280 _gst_enable_registry_fork = enabled;
1281 #endif /* HAVE_FORK */