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 /* GStreamer was built against a GLib >= 2.8 and is therefore not doing
506 * the refcount hack. Check that it isn't being run against an older GLib */
507 if (glib_major_version < 2 ||
508 (glib_major_version == 2 && glib_minor_version < 8)) {
509 g_warning ("GStreamer was compiled against GLib %d.%d.%d but is running"
510 " against %d.%d.%d. This will cause reference counting issues",
511 GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION,
512 glib_major_version, glib_minor_version, glib_micro_version);
517 if (g_thread_supported ()) {
518 /* somebody already initialized threading */
520 g_thread_init (NULL);
522 /* we need threading to be enabled right here */
526 setlocale (LC_ALL, "");
527 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
528 #endif /* ENABLE_NLS */
530 #ifndef GST_DISABLE_GST_DEBUG
532 const gchar *debug_list;
534 if (g_getenv ("GST_DEBUG_NO_COLOR") != NULL)
535 gst_debug_set_colored (FALSE);
537 debug_list = g_getenv ("GST_DEBUG");
539 parse_debug_list (debug_list);
543 /* This is the earliest we can make stuff show up in the logs.
544 * So give some useful info about GStreamer here */
545 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
546 GST_INFO ("Using library installed in %s", LIBDIR);
548 /* Print some basic system details if possible (OS/architecture) */
549 #ifdef HAVE_SYS_UTSNAME_H
551 struct utsname sys_details;
553 if (uname (&sys_details) == 0) {
554 GST_INFO ("%s %s %s %s %s", sys_details.sysname,
555 sys_details.nodename, sys_details.release, sys_details.version,
556 sys_details.machine);
565 gst_register_core_elements (GstPlugin * plugin)
567 /* register some standard builtin types */
568 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
570 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
573 g_assert_not_reached ();
578 static GstPluginDesc plugin_desc = {
582 "core elements linked into the GStreamer library",
583 gst_register_core_elements,
593 #ifndef GST_DISABLE_REGISTRY
596 * scan_and_update_registry:
597 * @default_registry: the #GstRegistry
598 * @registry_file: registry filename
599 * @write_changes: write registry if it has changed?
601 * Scans for registry changes and evntualy updates the registry cache.
603 * Return: %TRUE if the registry could be updated
606 scan_and_update_registry (GstRegistry * default_registry,
607 const gchar * registry_file, gboolean write_changes, GError ** error)
609 const gchar *plugin_path;
610 gboolean changed = FALSE;
613 GST_DEBUG ("reading registry cache: %s", registry_file);
614 gst_registry_xml_read_cache (default_registry, registry_file);
616 /* scan paths specified via --gst-plugin-path */
617 GST_DEBUG ("scanning paths added via --gst-plugin-path");
618 for (l = plugin_paths; l != NULL; l = l->next) {
619 GST_INFO ("Scanning plugin path: \"%s\"", (gchar *) l->data);
620 /* CHECKME: add changed |= here as well? */
621 gst_registry_scan_path (default_registry, (gchar *) l->data);
624 g_list_free (plugin_paths);
627 /* GST_PLUGIN_PATH specifies a list of directories to scan for
628 * additional plugins. These take precedence over the system plugins */
629 plugin_path = g_getenv ("GST_PLUGIN_PATH");
634 GST_DEBUG ("GST_PLUGIN_PATH set to %s", plugin_path);
635 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
636 for (i = 0; list[i]; i++) {
637 changed |= gst_registry_scan_path (default_registry, list[i]);
641 GST_DEBUG ("GST_PLUGIN_PATH not set");
644 /* GST_PLUGIN_SYSTEM_PATH specifies a list of plugins that are always
645 * loaded by default. If not set, this defaults to the system-installed
646 * path, and the plugins installed in the user's home directory */
647 plugin_path = g_getenv ("GST_PLUGIN_SYSTEM_PATH");
648 if (plugin_path == NULL) {
651 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH not set");
653 /* plugins in the user's home directory take precedence over
654 * system-installed ones */
655 home_plugins = g_build_filename (g_get_home_dir (),
656 ".gstreamer-" GST_MAJORMINOR, "plugins", NULL);
657 changed |= gst_registry_scan_path (default_registry, home_plugins);
658 g_free (home_plugins);
660 /* add the main (installed) library path */
661 changed |= gst_registry_scan_path (default_registry, PLUGINDIR);
666 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path);
667 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
668 for (i = 0; list[i]; i++) {
669 changed |= gst_registry_scan_path (default_registry, list[i]);
674 /* Remove cached plugins so stale info is cleared. */
675 changed |= _priv_gst_registry_remove_cache_plugins (default_registry);
678 GST_INFO ("Registry cache has not changed");
682 if (!write_changes) {
683 GST_INFO ("Registry cached changed, but writing is disabled. Not writing.");
687 GST_INFO ("Registry cache changed. Writing new registry cache");
688 if (!gst_registry_xml_write_cache (default_registry, registry_file)) {
689 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
690 _("Error writing registry cache to %s: %s"),
691 registry_file, g_strerror (errno));
695 GST_INFO ("Registry cache written successfully");
700 ensure_current_registry_nonforking (GstRegistry * default_registry,
701 const gchar * registry_file, GError ** error)
703 /* fork() not available */
704 GST_DEBUG ("Updating registry cache in-process");
705 scan_and_update_registry (default_registry, registry_file, TRUE, error);
709 /* when forking is not available this function always does nothing but return
712 ensure_current_registry_forking (GstRegistry * default_registry,
713 const gchar * registry_file, GError ** error)
720 /* We fork here, and let the child read and possibly rebuild the registry.
721 * After that, the parent will re-read the freshly generated registry. */
722 GST_DEBUG ("forking to update registry");
724 if (pipe (pfd) == -1) {
725 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
726 _("Error re-scanning registry %s: %s"),
727 ", could not create pipes. Error", g_strerror (errno));
733 GST_ERROR ("Failed to fork()");
734 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
735 _("Error re-scanning registry %s: %s"),
736 ", failed to fork. Error", g_strerror (errno));
744 /* this is the child. Close the read pipe */
745 (void) close (pfd[0]);
747 GST_DEBUG ("child reading registry cache");
749 scan_and_update_registry (default_registry, registry_file, TRUE, NULL);
751 /* need to use _exit, so that any exit handlers registered don't
752 * bring down the main program */
753 GST_DEBUG ("child exiting: %s", (res) ? "SUCCESS" : "FAILURE");
755 /* make valgrind happy (yes, you can call it insane) */
756 g_free ((char *) registry_file);
758 /* write a result byte to the pipe */
759 res_byte = res ? '1' : '0';
761 ret = write (pfd[1], &res_byte, 1);
762 } while (ret == -1 && errno == EINTR);
763 /* if ret == -1 now, we could not write to pipe, probably
764 * means parent has exited before us */
765 (void) close (pfd[1]);
771 /* parent. Close write pipe */
772 (void) close (pfd[1]);
774 /* Wait for result from the pipe */
775 GST_DEBUG ("Waiting for data from child");
777 ret = read (pfd[0], &res_byte, 1);
778 } while (ret == -1 && errno == EINTR);
781 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
782 _("Error re-scanning registry %s: %s"),
783 ", read returned error", g_strerror (errno));
787 (void) close (pfd[0]);
789 /* Wait to ensure the child is reaped, but ignore the result */
790 GST_DEBUG ("parent waiting on child");
791 waitpid (pid, NULL, 0);
792 GST_DEBUG ("parent done waiting on child");
795 GST_ERROR ("child did not exit normally, terminated by signal");
796 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
797 _("Error re-scanning registry %s"), ", child terminated by signal");
801 if (res_byte == '1') {
802 GST_DEBUG ("Child succeeded. Parent reading registry cache");
803 gst_registry_xml_read_cache (default_registry, registry_file);
805 GST_DEBUG ("Child failed. Parent re-scanning registry, ignoring errors.");
806 scan_and_update_registry (default_registry, registry_file, FALSE, NULL);
809 #endif /* HAVE_FORK */
814 ensure_current_registry (GError ** error)
817 GstRegistry *default_registry;
821 default_registry = gst_registry_get_default ();
822 registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
823 if (registry_file == NULL) {
824 registry_file = g_build_filename (g_get_home_dir (),
825 ".gstreamer-" GST_MAJORMINOR, "registry." HOST_CPU ".xml", NULL);
828 /* first see if forking is enabled */
829 do_fork = _gst_enable_registry_fork;
831 const gchar *fork_env;
833 /* forking enabled, see if it is disabled with an env var */
834 if ((fork_env = g_getenv ("GST_REGISTRY_FORK"))) {
835 /* fork enabled for any value different from "no" */
836 do_fork = strcmp (fork_env, "no") != 0;
840 /* now check registry with or without forking */
842 GST_DEBUG ("forking for registry rebuild");
843 ret = ensure_current_registry_forking (default_registry, registry_file,
846 GST_DEBUG ("requested not to fork for registry rebuild");
847 ret = ensure_current_registry_nonforking (default_registry, registry_file,
851 g_free (registry_file);
855 #endif /* GST_DISABLE_REGISTRY */
859 * - initalization of threads if we use them
862 * - initializes gst_format
863 * - registers a bunch of types for gst_objects
865 * - we don't have cases yet where this fails, but in the future
866 * we might and then it's nice to be able to return that
869 init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
874 #ifndef GST_DISABLE_TRACE
876 #endif /* GST_DISABLE_TRACE */
878 llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
879 g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
881 _priv_gst_quarks_initialize ();
882 _gst_format_initialize ();
883 _gst_query_initialize ();
884 gst_object_get_type ();
886 gst_element_factory_get_type ();
887 gst_element_get_type ();
888 gst_type_find_factory_get_type ();
891 #ifndef GST_DISABLE_INDEX
892 gst_index_factory_get_type ();
893 #endif /* GST_DISABLE_INDEX */
894 #ifndef GST_DISABLE_URI
895 gst_uri_handler_get_type ();
896 #endif /* GST_DISABLE_URI */
898 gst_structure_get_type ();
899 _gst_value_initialize ();
900 gst_caps_get_type ();
901 _gst_event_initialize ();
902 _gst_buffer_initialize ();
903 _gst_message_initialize ();
904 _gst_tag_initialize ();
906 /* register core plugins */
907 _gst_plugin_register_static (&plugin_desc);
909 _gst_plugin_initialize ();
912 * Any errors happening below this point are non-fatal, we therefore mark
913 * gstreamer as being initialized, since it is the case from a plugin point of
916 * If anything fails, it will be put back to FALSE in gst_init_check().
917 * This allows some special plugins that would call gst_init() to not cause a
918 * looping effect (i.e. initializing GStreamer twice).
920 gst_initialized = TRUE;
922 #ifndef GST_DISABLE_REGISTRY
923 if (!ensure_current_registry (error))
925 #endif /* GST_DISABLE_REGISTRY */
927 /* if we need to preload plugins */
928 if (preload_plugins) {
929 g_slist_foreach (preload_plugins, load_plugin_func, NULL);
930 g_slist_free (preload_plugins);
931 preload_plugins = NULL;
933 #ifndef GST_DISABLE_TRACE
936 gst_trace = gst_trace_new ("gst.trace", 1024);
937 gst_trace_set_default (gst_trace);
939 #endif /* GST_DISABLE_TRACE */
944 #ifndef GST_DISABLE_GST_DEBUG
946 select_all (GstPlugin * plugin, gpointer user_data)
952 sort_by_category_name (gconstpointer a, gconstpointer b)
954 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
955 gst_debug_category_get_name ((GstDebugCategory *) b));
958 gst_debug_help (void)
963 /* Need to ensure the registry is loaded to get debug categories */
964 if (!init_post (NULL, NULL, NULL, NULL))
967 list2 = gst_registry_plugin_filter (gst_registry_get_default (),
968 select_all, FALSE, NULL);
970 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
971 for (g = list2; g; g = g_list_next (g)) {
972 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
974 gst_plugin_load (plugin);
978 list = gst_debug_get_all_categories ();
979 walk = list = g_slist_sort (list, sort_by_category_name);
982 g_print ("name level description\n");
983 g_print ("---------------------+--------+--------------------------------\n");
986 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
988 if (gst_debug_is_colored ()) {
989 gchar *color = gst_debug_construct_term_color (cat->color);
991 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
993 gst_debug_category_get_name (cat),
994 gst_debug_category_get_threshold (cat),
995 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
996 color, gst_debug_category_get_description (cat));
999 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
1000 gst_debug_category_get_threshold (cat),
1001 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
1002 gst_debug_category_get_description (cat));
1004 walk = g_slist_next (walk);
1006 g_slist_free (list);
1012 parse_one_option (gint opt, const gchar * arg, GError ** err)
1016 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
1018 case ARG_FATAL_WARNINGS:{
1019 GLogLevelFlags fatal_mask;
1021 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
1022 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
1023 g_log_set_always_fatal (fatal_mask);
1026 #ifndef GST_DISABLE_GST_DEBUG
1027 case ARG_DEBUG_LEVEL:{
1030 tmp = strtol (arg, NULL, 0);
1031 if (tmp >= 0 && tmp < GST_LEVEL_COUNT) {
1032 gst_debug_set_default_threshold (tmp);
1037 parse_debug_list (arg);
1039 case ARG_DEBUG_NO_COLOR:
1040 gst_debug_set_colored (FALSE);
1042 case ARG_DEBUG_DISABLE:
1043 gst_debug_set_active (FALSE);
1045 case ARG_DEBUG_HELP:
1049 case ARG_PLUGIN_SPEW:
1051 case ARG_PLUGIN_PATH:
1052 #ifndef GST_DISABLE_REGISTRY
1053 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
1054 #endif /* GST_DISABLE_REGISTRY */
1056 case ARG_PLUGIN_LOAD:
1057 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
1059 case ARG_SEGTRAP_DISABLE:
1060 _gst_disable_segtrap = TRUE;
1062 case ARG_REGISTRY_FORK_DISABLE:
1063 _gst_enable_registry_fork = FALSE;
1066 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
1067 _("Unknown option"));
1075 parse_goption_arg (const gchar * opt,
1076 const gchar * arg, gpointer data, GError ** err)
1084 "--gst-version", ARG_VERSION}, {
1085 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
1086 #ifndef GST_DISABLE_GST_DEBUG
1088 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
1089 "--gst-debug", ARG_DEBUG}, {
1090 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
1091 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
1092 "--gst-debug-help", ARG_DEBUG_HELP},
1095 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
1096 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
1097 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
1098 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
1099 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
1104 for (n = 0; options[n].opt; n++) {
1105 if (!strcmp (opt, options[n].opt)) {
1106 val = options[n].val;
1111 return parse_one_option (val, arg, err);
1114 extern GstRegistry *_gst_registry_default;
1119 * Clean up any resources created by GStreamer in gst_init().
1121 * It is normally not needed to call this function in a normal application
1122 * as the resources will automatically be freed when the program terminates.
1123 * This function is therefore mostly used by testsuites and other memory
1126 * After this call GStreamer (including this method) should not be used anymore.
1133 GST_INFO ("deinitializing GStreamer");
1135 if (!gst_initialized) {
1136 GST_DEBUG ("already deinitialized");
1140 clock = gst_system_clock_obtain ();
1141 gst_object_unref (clock);
1142 gst_object_unref (clock);
1144 _priv_gst_registry_cleanup ();
1146 gst_initialized = FALSE;
1147 GST_INFO ("deinitialized GStreamer");
1152 * @major: pointer to a guint to store the major version number
1153 * @minor: pointer to a guint to store the minor version number
1154 * @micro: pointer to a guint to store the micro version number
1155 * @nano: pointer to a guint to store the nano version number
1157 * Gets the version number of the GStreamer library.
1160 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1162 g_return_if_fail (major);
1163 g_return_if_fail (minor);
1164 g_return_if_fail (micro);
1165 g_return_if_fail (nano);
1167 *major = GST_VERSION_MAJOR;
1168 *minor = GST_VERSION_MINOR;
1169 *micro = GST_VERSION_MICRO;
1170 *nano = GST_VERSION_NANO;
1174 * gst_version_string:
1176 * This function returns a string that is useful for describing this version
1177 * of GStreamer to the outside world: user agent strings, logging, ...
1179 * Returns: a newly allocated string describing this version of GStreamer.
1183 gst_version_string ()
1185 guint major, minor, micro, nano;
1187 gst_version (&major, &minor, µ, &nano);
1189 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1191 return g_strdup_printf ("GStreamer %d.%d.%d (CVS)", major, minor, micro);
1193 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1198 * gst_segtrap_is_enabled:
1200 * Some functions in the GStreamer core might install a custom SIGSEGV handler
1201 * to better catch and report errors to the application. Currently this feature
1202 * is enabled by default when loading plugins.
1204 * Applications might want to disable this behaviour with the
1205 * gst_segtrap_set_enabled() function. This is typically done if the application
1206 * wants to install its own handler without GStreamer interfering.
1208 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1213 gst_segtrap_is_enabled (void)
1215 /* yeps, it's enabled when it's not disabled */
1216 return !_gst_disable_segtrap;
1220 * gst_segtrap_set_enabled:
1221 * @enabled: whether a custom SIGSEGV handler should be installed.
1223 * Applications might want to disable/enable the SIGSEGV handling of
1224 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1229 gst_segtrap_set_enabled (gboolean enabled)
1231 _gst_disable_segtrap = !enabled;
1235 * gst_registry_fork_is_enabled:
1237 * By default GStreamer will perform a fork() when scanning and rebuilding the
1240 * Applications might want to disable this behaviour with the
1241 * gst_registry_fork_set_enabled() function.
1243 * Returns: %TRUE if GStreamer will use fork() when rebuilding the registry. On
1244 * platforms without fork(), this function will always return %FALSE.
1249 gst_registry_fork_is_enabled (void)
1251 return _gst_enable_registry_fork;
1255 * gst_registry_fork_set_enabled:
1256 * @enabled: whether rebuilding the registry may fork
1258 * Applications might want to disable/enable the usage of fork() when rebuilding
1259 * the registry. See gst_registry_fork_is_enabled() for more information.
1261 * On platforms without fork(), this function will have no effect on the return
1262 * value of gst_registry_fork_is_enabled().
1267 gst_registry_fork_set_enabled (gboolean enabled)
1270 _gst_enable_registry_fork = enabled;
1271 #endif /* HAVE_FORK */