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 * // must initialise the threading system before using any other GLib funtion
80 * if (!g_thread_supported ())
81 * g_thread_init (NULL);
82 * ctx = g_option_context_new ("[ADDITIONAL ARGUMENTS]");
83 * g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
84 * g_option_context_add_group (ctx, gst_init_get_option_group ());
85 * if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
86 * g_print ("Error initializing: %s\n", GST_STR_NULL (err->message));
89 * g_option_context_free (ctx);
95 * Use gst_version() to query the library version at runtime or use the
96 * GST_VERSION_* macros to find the version at compile time. Optionally
97 * gst_version_string() returns a printable string.
99 * The gst_deinit() call is used to clean up all internal resources used
100 * by <application>GStreamer</application>. It is mostly used in unit tests
101 * to check for leaks.
103 * Last reviewed on 2006-08-11 (0.10.10)
106 #include "gst_private.h"
109 #include <sys/types.h>
111 #include <sys/wait.h>
112 #endif /* HAVE_FORK */
113 #ifdef HAVE_SYS_UTSNAME_H
114 #include <sys/utsname.h>
120 #include "gst-i18n-lib.h"
121 #include <locale.h> /* for LC_ALL */
125 #define GST_CAT_DEFAULT GST_CAT_GST_INIT
127 #define MAX_PATH_SPLIT 16
128 #define GST_PLUGIN_SEPARATOR ","
130 static gboolean gst_initialized = FALSE;
132 #ifndef GST_DISABLE_REGISTRY
133 static GList *plugin_paths = NULL; /* for delayed processing in post_init */
136 extern gint _gst_trace_on;
140 #define DEFAULT_FORK TRUE
142 #define DEFAULT_FORK FALSE
143 #endif /* HAVE_FORK */
145 /* set to TRUE when segfaults need to be left as is, FIXME, this variable is
147 gboolean _gst_disable_segtrap = FALSE;
149 /* control the behaviour of registry rebuild */
150 static gboolean _gst_enable_registry_fork = DEFAULT_FORK;
152 static void load_plugin_func (gpointer data, gpointer user_data);
153 static gboolean init_pre (GOptionContext * context, GOptionGroup * group,
154 gpointer data, GError ** error);
155 static gboolean init_post (GOptionContext * context, GOptionGroup * group,
156 gpointer data, GError ** error);
157 static gboolean parse_goption_arg (const gchar * s_opt,
158 const gchar * arg, gpointer data, GError ** err);
160 static GSList *preload_plugins = NULL;
162 const gchar g_log_domain_gstreamer[] = "GStreamer";
165 debug_log_handler (const gchar * log_domain,
166 GLogLevelFlags log_level, const gchar * message, gpointer user_data)
168 g_log_default_handler (log_domain, log_level, message, user_data);
169 /* FIXME: do we still need this ? fatal errors these days are all
170 * other than core errors */
171 /* g_on_error_query (NULL); */
178 #ifndef GST_DISABLE_GST_DEBUG
189 ARG_REGISTRY_FORK_DISABLE
192 /* debug-spec ::= category-spec [, category-spec]*
193 * category-spec ::= category:val | val
202 #ifndef GST_DISABLE_GST_DEBUG
204 parse_debug_category (gchar * str, const gchar ** category)
221 parse_debug_level (gchar * str, gint * level)
229 if (str[0] != NUL && str[1] == NUL
230 && str[0] >= '0' && str[0] < '0' + GST_LEVEL_COUNT) {
231 *level = str[0] - '0';
239 parse_debug_list (const gchar * list)
244 g_return_if_fail (list != NULL);
246 split = g_strsplit (list, ",", 0);
248 for (walk = split; *walk; walk++) {
249 if (strchr (*walk, ':')) {
250 gchar **values = g_strsplit (*walk, ":", 2);
252 if (values[0] && values[1]) {
254 const gchar *category;
256 if (parse_debug_category (values[0], &category)
257 && parse_debug_level (values[1], &level))
258 gst_debug_set_threshold_for_name (category, level);
265 if (parse_debug_level (*walk, &level))
266 gst_debug_set_default_threshold (level);
275 * gst_init_get_option_group:
277 * Returns a #GOptionGroup with GStreamer's argument specifications. The
278 * group is set up to use standard GOption callbacks, so when using this
279 * group in combination with GOption parsing methods, all argument parsing
280 * and initialization is automated.
282 * This function is useful if you want to integrate GStreamer with other
283 * libraries that use GOption (see g_option_context_add_group() ).
285 * If you use this function, you should make sure you initialise the GLib
286 * threading system as one of the very first things in your program
287 * (see the example at the beginning of this section).
289 * Returns: a pointer to GStreamer's option group.
293 gst_init_get_option_group (void)
296 const static GOptionEntry gst_args[] = {
297 {"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
298 (gpointer) parse_goption_arg, N_("Print the GStreamer version"), NULL},
299 {"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
300 (gpointer) parse_goption_arg, N_("Make all warnings fatal"), NULL},
301 #ifndef GST_DISABLE_GST_DEBUG
302 {"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
303 (gpointer) parse_goption_arg,
304 N_("Print available debug categories and exit"),
306 {"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK,
307 (gpointer) parse_goption_arg,
308 N_("Default debug level from 1 (only error) to 5 (anything) or "
311 {"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) parse_goption_arg,
312 N_("Comma-separated list of category_name:level pairs to set "
313 "specific levels for the individual categories. Example: "
314 "GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
316 {"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
317 (gpointer) parse_goption_arg, N_("Disable colored debugging output"),
319 {"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
320 (gpointer) parse_goption_arg, N_("Disable debugging"), NULL},
322 {"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
323 (gpointer) parse_goption_arg,
324 N_("Enable verbose plugin loading diagnostics"),
326 {"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK,
327 (gpointer) parse_goption_arg,
328 N_("Colon-separated paths containing plugins"), N_("PATHS")},
329 {"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK,
330 (gpointer) parse_goption_arg,
331 N_("Comma-separated list of plugins to preload in addition to the "
332 "list stored in environment variable GST_PLUGIN_PATH"),
334 {"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
335 (gpointer) parse_goption_arg,
336 N_("Disable trapping of segmentation faults during plugin loading"),
338 {"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
339 G_OPTION_ARG_CALLBACK,
340 (gpointer) parse_goption_arg,
341 N_("Disable the use of fork() while scanning the registry"),
346 /* The GLib threading system must be initialised before calling any other
347 * GLib function according to the documentation; if the application hasn't
348 * called gst_init() yet or initialised the threading system otherwise, we
349 * better issue a warning here (since chances are high that the application
350 * has already called other GLib functions such as g_option_context_new() */
351 if (!g_thread_supported ()) {
352 g_warning ("The GStreamer function gst_init_get_option_group() was\n"
353 "\tcalled, but the GLib threading system has not been initialised\n"
354 "\tyet, something that must happen before any other GLib function\n"
355 "\tis called. The application needs to be fixed accordingly, please\n"
356 "\tfile a bug against this application.");
357 g_thread_init (NULL);
360 group = g_option_group_new ("gst", _("GStreamer Options"),
361 _("Show GStreamer Options"), NULL, NULL);
362 g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
363 (GOptionParseFunc) init_post);
365 g_option_group_add_entries (group, gst_args);
366 g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
373 * @argc: pointer to application's argc
374 * @argv: pointer to application's argv
375 * @err: pointer to a #GError to which a message will be posted on error
377 * Initializes the GStreamer library, setting up internal path lists,
378 * registering built-in elements, and loading standard plugins.
380 * This function will return %FALSE if GStreamer could not be initialized
381 * for some reason. If you want your program to fail fatally,
382 * use gst_init() instead.
384 * This function should be called before calling any other GLib functions. If
385 * this is not an option, your program must initialise the GLib thread system
386 * using g_thread_init() before any other GLib functions are called.
388 * Returns: %TRUE if GStreamer could be initialized.
391 gst_init_check (int *argc, char **argv[], GError ** err)
397 if (!g_thread_supported ())
398 g_thread_init (NULL);
400 GST_INFO ("initializing GStreamer");
402 if (gst_initialized) {
403 GST_DEBUG ("already initialized gst");
407 ctx = g_option_context_new ("- GStreamer initialization");
408 g_option_context_set_ignore_unknown_options (ctx, TRUE);
409 group = gst_init_get_option_group ();
410 g_option_context_add_group (ctx, group);
411 res = g_option_context_parse (ctx, argc, argv, err);
412 g_option_context_free (ctx);
414 gst_initialized = res;
417 GST_INFO ("initialized GStreamer successfully");
419 GST_INFO ("failed to initialize GStreamer");
427 * @argc: pointer to application's argc
428 * @argv: pointer to application's argv
430 * Initializes the GStreamer library, setting up internal path lists,
431 * registering built-in elements, and loading standard plugins.
433 * This function should be called before calling any other GLib functions. If
434 * this is not an option, your program must initialise the GLib thread system
435 * using g_thread_init() before any other GLib functions are called.
438 * This function will terminate your program if it was unable to initialize
439 * GStreamer for some reason. If you want your program to fall back,
440 * use gst_init_check() instead.
443 * WARNING: This function does not work in the same way as corresponding
444 * functions in other glib-style libraries, such as gtk_init(). In
445 * particular, unknown command line options cause this function to
446 * abort program execution.
449 gst_init (int *argc, char **argv[])
453 if (!gst_init_check (argc, argv, &err)) {
454 g_print ("Could not initialize GStreamer: %s\n",
455 err ? err->message : "unknown error occurred");
463 #ifndef GST_DISABLE_REGISTRY
465 add_path_func (gpointer data, gpointer user_data)
467 GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
468 plugin_paths = g_list_append (plugin_paths, g_strdup (data));
473 prepare_for_load_plugin_func (gpointer data, gpointer user_data)
475 preload_plugins = g_slist_prepend (preload_plugins, g_strdup (data));
479 load_plugin_func (gpointer data, gpointer user_data)
482 const gchar *filename;
485 filename = (const gchar *) data;
487 plugin = gst_plugin_load_file (filename, &err);
490 GST_INFO ("Loaded plugin: \"%s\"", filename);
492 gst_default_registry_add_plugin (plugin);
495 /* Report error to user, and free error */
496 GST_ERROR ("Failed to load plugin: %s\n", err->message);
499 GST_WARNING ("Failed to load plugin: \"%s\"", filename);
507 split_and_iterate (const gchar * stringlist, gchar * separator, GFunc iterator,
512 gchar *lastlist = g_strdup (stringlist);
515 strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
520 iterator (strings[j], user_data);
521 if (++j == MAX_PATH_SPLIT) {
522 lastlist = g_strdup (strings[j]);
527 g_strfreev (strings);
531 /* we have no fail cases yet, but maybe in the future */
533 init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
536 if (gst_initialized) {
537 GST_DEBUG ("already initialized");
541 /* GStreamer was built against a GLib >= 2.8 and is therefore not doing
542 * the refcount hack. Check that it isn't being run against an older GLib */
543 if (glib_major_version < 2 ||
544 (glib_major_version == 2 && glib_minor_version < 8)) {
545 g_warning ("GStreamer was compiled against GLib %d.%d.%d but is running"
546 " against %d.%d.%d. This will cause reference counting issues",
547 GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION,
548 glib_major_version, glib_minor_version, glib_micro_version);
553 /* we need threading to be enabled right here */
554 g_assert (g_thread_supported ());
558 setlocale (LC_ALL, "");
559 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
560 #endif /* ENABLE_NLS */
562 #ifndef GST_DISABLE_GST_DEBUG
564 const gchar *debug_list;
566 if (g_getenv ("GST_DEBUG_NO_COLOR") != NULL)
567 gst_debug_set_colored (FALSE);
569 debug_list = g_getenv ("GST_DEBUG");
571 parse_debug_list (debug_list);
575 /* This is the earliest we can make stuff show up in the logs.
576 * So give some useful info about GStreamer here */
577 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
578 GST_INFO ("Using library installed in %s", LIBDIR);
580 /* Print some basic system details if possible (OS/architecture) */
581 #ifdef HAVE_SYS_UTSNAME_H
583 struct utsname sys_details;
585 if (uname (&sys_details) == 0) {
586 GST_INFO ("%s %s %s %s %s", sys_details.sysname,
587 sys_details.nodename, sys_details.release, sys_details.version,
588 sys_details.machine);
597 gst_register_core_elements (GstPlugin * plugin)
599 /* register some standard builtin types */
600 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
602 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
605 g_assert_not_reached ();
610 static GstPluginDesc plugin_desc = {
614 "core elements linked into the GStreamer library",
615 gst_register_core_elements,
625 #ifndef GST_DISABLE_REGISTRY
628 * scan_and_update_registry:
629 * @default_registry: the #GstRegistry
630 * @registry_file: registry filename
631 * @write_changes: write registry if it has changed?
633 * Scans for registry changes and eventually updates the registry cache.
635 * Return: %TRUE if the registry could be updated
638 scan_and_update_registry (GstRegistry * default_registry,
639 const gchar * registry_file, gboolean write_changes, GError ** error)
641 const gchar *plugin_path;
642 gboolean changed = FALSE;
645 GST_DEBUG ("reading registry cache: %s", registry_file);
646 gst_registry_xml_read_cache (default_registry, registry_file);
648 /* scan paths specified via --gst-plugin-path */
649 GST_DEBUG ("scanning paths added via --gst-plugin-path");
650 for (l = plugin_paths; l != NULL; l = l->next) {
651 GST_INFO ("Scanning plugin path: \"%s\"", (gchar *) l->data);
652 /* CHECKME: add changed |= here as well? */
653 gst_registry_scan_path (default_registry, (gchar *) l->data);
656 g_list_free (plugin_paths);
659 /* GST_PLUGIN_PATH specifies a list of directories to scan for
660 * additional plugins. These take precedence over the system plugins */
661 plugin_path = g_getenv ("GST_PLUGIN_PATH");
666 GST_DEBUG ("GST_PLUGIN_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]);
673 GST_DEBUG ("GST_PLUGIN_PATH not set");
676 /* GST_PLUGIN_SYSTEM_PATH specifies a list of plugins that are always
677 * loaded by default. If not set, this defaults to the system-installed
678 * path, and the plugins installed in the user's home directory */
679 plugin_path = g_getenv ("GST_PLUGIN_SYSTEM_PATH");
680 if (plugin_path == NULL) {
683 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH not set");
685 /* plugins in the user's home directory take precedence over
686 * system-installed ones */
687 home_plugins = g_build_filename (g_get_home_dir (),
688 ".gstreamer-" GST_MAJORMINOR, "plugins", NULL);
689 changed |= gst_registry_scan_path (default_registry, home_plugins);
690 g_free (home_plugins);
692 /* add the main (installed) library path */
693 changed |= gst_registry_scan_path (default_registry, PLUGINDIR);
698 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path);
699 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
700 for (i = 0; list[i]; i++) {
701 changed |= gst_registry_scan_path (default_registry, list[i]);
706 /* Remove cached plugins so stale info is cleared. */
707 changed |= _priv_gst_registry_remove_cache_plugins (default_registry);
710 GST_INFO ("Registry cache has not changed");
714 if (!write_changes) {
715 GST_INFO ("Registry cached changed, but writing is disabled. Not writing.");
719 GST_INFO ("Registry cache changed. Writing new registry cache");
720 if (!gst_registry_xml_write_cache (default_registry, registry_file)) {
721 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
722 _("Error writing registry cache to %s: %s"),
723 registry_file, g_strerror (errno));
727 GST_INFO ("Registry cache written successfully");
732 ensure_current_registry_nonforking (GstRegistry * default_registry,
733 const gchar * registry_file, GError ** error)
735 /* fork() not available */
736 GST_DEBUG ("Updating registry cache in-process");
737 scan_and_update_registry (default_registry, registry_file, TRUE, error);
741 /* when forking is not available this function always does nothing but return
744 ensure_current_registry_forking (GstRegistry * default_registry,
745 const gchar * registry_file, GError ** error)
752 /* We fork here, and let the child read and possibly rebuild the registry.
753 * After that, the parent will re-read the freshly generated registry. */
754 GST_DEBUG ("forking to update registry");
756 if (pipe (pfd) == -1) {
757 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
758 _("Error re-scanning registry %s: %s"),
759 ", could not create pipes. Error", g_strerror (errno));
765 GST_ERROR ("Failed to fork()");
766 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
767 _("Error re-scanning registry %s: %s"),
768 ", failed to fork. Error", g_strerror (errno));
776 /* this is the child. Close the read pipe */
777 (void) close (pfd[0]);
779 GST_DEBUG ("child reading registry cache");
781 scan_and_update_registry (default_registry, registry_file, TRUE, NULL);
783 /* need to use _exit, so that any exit handlers registered don't
784 * bring down the main program */
785 GST_DEBUG ("child exiting: %s", (res) ? "SUCCESS" : "FAILURE");
787 /* make valgrind happy (yes, you can call it insane) */
788 g_free ((char *) registry_file);
790 /* write a result byte to the pipe */
791 res_byte = res ? '1' : '0';
793 ret = write (pfd[1], &res_byte, 1);
794 } while (ret == -1 && errno == EINTR);
795 /* if ret == -1 now, we could not write to pipe, probably
796 * means parent has exited before us */
797 (void) close (pfd[1]);
803 /* parent. Close write pipe */
804 (void) close (pfd[1]);
806 /* Wait for result from the pipe */
807 GST_DEBUG ("Waiting for data from child");
809 ret = read (pfd[0], &res_byte, 1);
810 } while (ret == -1 && errno == EINTR);
813 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
814 _("Error re-scanning registry %s: %s"),
815 ", read returned error", g_strerror (errno));
819 (void) close (pfd[0]);
821 /* Wait to ensure the child is reaped, but ignore the result */
822 GST_DEBUG ("parent waiting on child");
823 waitpid (pid, NULL, 0);
824 GST_DEBUG ("parent done waiting on child");
827 GST_ERROR ("child did not exit normally, terminated by signal");
828 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
829 _("Error re-scanning registry %s"), ", child terminated by signal");
833 if (res_byte == '1') {
834 GST_DEBUG ("Child succeeded. Parent reading registry cache");
835 gst_registry_xml_read_cache (default_registry, registry_file);
837 GST_DEBUG ("Child failed. Parent re-scanning registry, ignoring errors.");
838 scan_and_update_registry (default_registry, registry_file, FALSE, NULL);
841 #endif /* HAVE_FORK */
846 ensure_current_registry (GError ** error)
849 GstRegistry *default_registry;
853 default_registry = gst_registry_get_default ();
854 registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
855 if (registry_file == NULL) {
856 registry_file = g_build_filename (g_get_home_dir (),
857 ".gstreamer-" GST_MAJORMINOR, "registry." HOST_CPU ".xml", NULL);
860 /* first see if forking is enabled */
861 do_fork = _gst_enable_registry_fork;
863 const gchar *fork_env;
865 /* forking enabled, see if it is disabled with an env var */
866 if ((fork_env = g_getenv ("GST_REGISTRY_FORK"))) {
867 /* fork enabled for any value different from "no" */
868 do_fork = strcmp (fork_env, "no") != 0;
872 /* now check registry with or without forking */
874 GST_DEBUG ("forking for registry rebuild");
875 ret = ensure_current_registry_forking (default_registry, registry_file,
878 GST_DEBUG ("requested not to fork for registry rebuild");
879 ret = ensure_current_registry_nonforking (default_registry, registry_file,
883 g_free (registry_file);
887 #endif /* GST_DISABLE_REGISTRY */
891 * - initalization of threads if we use them
894 * - initializes gst_format
895 * - registers a bunch of types for gst_objects
897 * - we don't have cases yet where this fails, but in the future
898 * we might and then it's nice to be able to return that
901 init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
906 #ifndef GST_DISABLE_TRACE
908 #endif /* GST_DISABLE_TRACE */
910 if (gst_initialized) {
911 GST_DEBUG ("already initialized");
915 llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
916 g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
918 _priv_gst_quarks_initialize ();
919 _gst_format_initialize ();
920 _gst_query_initialize ();
921 gst_object_get_type ();
923 gst_element_factory_get_type ();
924 gst_element_get_type ();
925 gst_type_find_factory_get_type ();
928 #ifndef GST_DISABLE_INDEX
929 gst_index_factory_get_type ();
930 #endif /* GST_DISABLE_INDEX */
931 #ifndef GST_DISABLE_URI
932 gst_uri_handler_get_type ();
933 #endif /* GST_DISABLE_URI */
935 gst_structure_get_type ();
936 _gst_value_initialize ();
937 gst_caps_get_type ();
938 _gst_event_initialize ();
939 _gst_buffer_initialize ();
940 _gst_message_initialize ();
941 _gst_tag_initialize ();
943 /* register core plugins */
944 _gst_plugin_register_static (&plugin_desc);
946 _gst_plugin_initialize ();
949 * Any errors happening below this point are non-fatal, we therefore mark
950 * gstreamer as being initialized, since it is the case from a plugin point of
953 * If anything fails, it will be put back to FALSE in gst_init_check().
954 * This allows some special plugins that would call gst_init() to not cause a
955 * looping effect (i.e. initializing GStreamer twice).
957 gst_initialized = TRUE;
959 #ifndef GST_DISABLE_REGISTRY
960 if (!ensure_current_registry (error))
962 #endif /* GST_DISABLE_REGISTRY */
964 /* if we need to preload plugins */
965 if (preload_plugins) {
966 g_slist_foreach (preload_plugins, load_plugin_func, NULL);
967 g_slist_free (preload_plugins);
968 preload_plugins = NULL;
970 #ifndef GST_DISABLE_TRACE
973 gst_trace = gst_trace_new ("gst.trace", 1024);
974 gst_trace_set_default (gst_trace);
976 #endif /* GST_DISABLE_TRACE */
981 #ifndef GST_DISABLE_GST_DEBUG
983 select_all (GstPlugin * plugin, gpointer user_data)
989 sort_by_category_name (gconstpointer a, gconstpointer b)
991 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
992 gst_debug_category_get_name ((GstDebugCategory *) b));
995 gst_debug_help (void)
1000 /* Need to ensure the registry is loaded to get debug categories */
1001 if (!init_post (NULL, NULL, NULL, NULL))
1004 list2 = gst_registry_plugin_filter (gst_registry_get_default (),
1005 select_all, FALSE, NULL);
1007 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
1008 for (g = list2; g; g = g_list_next (g)) {
1009 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
1011 gst_plugin_load (plugin);
1013 g_list_free (list2);
1015 list = gst_debug_get_all_categories ();
1016 walk = list = g_slist_sort (list, sort_by_category_name);
1019 g_print ("name level description\n");
1020 g_print ("---------------------+--------+--------------------------------\n");
1023 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
1025 if (gst_debug_is_colored ()) {
1026 gchar *color = gst_debug_construct_term_color (cat->color);
1028 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
1030 gst_debug_category_get_name (cat),
1031 gst_debug_category_get_threshold (cat),
1032 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
1033 color, gst_debug_category_get_description (cat));
1036 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
1037 gst_debug_category_get_threshold (cat),
1038 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
1039 gst_debug_category_get_description (cat));
1041 walk = g_slist_next (walk);
1043 g_slist_free (list);
1049 parse_one_option (gint opt, const gchar * arg, GError ** err)
1053 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
1055 case ARG_FATAL_WARNINGS:{
1056 GLogLevelFlags fatal_mask;
1058 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
1059 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
1060 g_log_set_always_fatal (fatal_mask);
1063 #ifndef GST_DISABLE_GST_DEBUG
1064 case ARG_DEBUG_LEVEL:{
1067 tmp = strtol (arg, NULL, 0);
1068 if (tmp >= 0 && tmp < GST_LEVEL_COUNT) {
1069 gst_debug_set_default_threshold (tmp);
1074 parse_debug_list (arg);
1076 case ARG_DEBUG_NO_COLOR:
1077 gst_debug_set_colored (FALSE);
1079 case ARG_DEBUG_DISABLE:
1080 gst_debug_set_active (FALSE);
1082 case ARG_DEBUG_HELP:
1086 case ARG_PLUGIN_SPEW:
1088 case ARG_PLUGIN_PATH:
1089 #ifndef GST_DISABLE_REGISTRY
1090 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
1091 #endif /* GST_DISABLE_REGISTRY */
1093 case ARG_PLUGIN_LOAD:
1094 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
1096 case ARG_SEGTRAP_DISABLE:
1097 _gst_disable_segtrap = TRUE;
1099 case ARG_REGISTRY_FORK_DISABLE:
1100 _gst_enable_registry_fork = FALSE;
1103 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
1104 _("Unknown option"));
1112 parse_goption_arg (const gchar * opt,
1113 const gchar * arg, gpointer data, GError ** err)
1121 "--gst-version", ARG_VERSION}, {
1122 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
1123 #ifndef GST_DISABLE_GST_DEBUG
1125 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
1126 "--gst-debug", ARG_DEBUG}, {
1127 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
1128 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
1129 "--gst-debug-help", ARG_DEBUG_HELP},
1132 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
1133 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
1134 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
1135 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
1136 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
1141 for (n = 0; options[n].opt; n++) {
1142 if (!strcmp (opt, options[n].opt)) {
1143 val = options[n].val;
1148 return parse_one_option (val, arg, err);
1151 extern GstRegistry *_gst_registry_default;
1156 * Clean up any resources created by GStreamer in gst_init().
1158 * It is normally not needed to call this function in a normal application
1159 * as the resources will automatically be freed when the program terminates.
1160 * This function is therefore mostly used by testsuites and other memory
1163 * After this call GStreamer (including this method) should not be used anymore.
1170 GST_INFO ("deinitializing GStreamer");
1172 if (!gst_initialized) {
1173 GST_DEBUG ("already deinitialized");
1177 clock = gst_system_clock_obtain ();
1178 gst_object_unref (clock);
1179 gst_object_unref (clock);
1181 _priv_gst_registry_cleanup ();
1183 gst_initialized = FALSE;
1184 GST_INFO ("deinitialized GStreamer");
1189 * @major: pointer to a guint to store the major version number
1190 * @minor: pointer to a guint to store the minor version number
1191 * @micro: pointer to a guint to store the micro version number
1192 * @nano: pointer to a guint to store the nano version number
1194 * Gets the version number of the GStreamer library.
1197 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1199 g_return_if_fail (major);
1200 g_return_if_fail (minor);
1201 g_return_if_fail (micro);
1202 g_return_if_fail (nano);
1204 *major = GST_VERSION_MAJOR;
1205 *minor = GST_VERSION_MINOR;
1206 *micro = GST_VERSION_MICRO;
1207 *nano = GST_VERSION_NANO;
1211 * gst_version_string:
1213 * This function returns a string that is useful for describing this version
1214 * of GStreamer to the outside world: user agent strings, logging, ...
1216 * Returns: a newly allocated string describing this version of GStreamer.
1220 gst_version_string ()
1222 guint major, minor, micro, nano;
1224 gst_version (&major, &minor, µ, &nano);
1226 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1228 return g_strdup_printf ("GStreamer %d.%d.%d (CVS)", major, minor, micro);
1230 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1235 * gst_segtrap_is_enabled:
1237 * Some functions in the GStreamer core might install a custom SIGSEGV handler
1238 * to better catch and report errors to the application. Currently this feature
1239 * is enabled by default when loading plugins.
1241 * Applications might want to disable this behaviour with the
1242 * gst_segtrap_set_enabled() function. This is typically done if the application
1243 * wants to install its own handler without GStreamer interfering.
1245 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1250 gst_segtrap_is_enabled (void)
1252 /* yeps, it's enabled when it's not disabled */
1253 return !_gst_disable_segtrap;
1257 * gst_segtrap_set_enabled:
1258 * @enabled: whether a custom SIGSEGV handler should be installed.
1260 * Applications might want to disable/enable the SIGSEGV handling of
1261 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1266 gst_segtrap_set_enabled (gboolean enabled)
1268 _gst_disable_segtrap = !enabled;
1272 * gst_registry_fork_is_enabled:
1274 * By default GStreamer will perform a fork() when scanning and rebuilding the
1277 * Applications might want to disable this behaviour with the
1278 * gst_registry_fork_set_enabled() function.
1280 * Returns: %TRUE if GStreamer will use fork() when rebuilding the registry. On
1281 * platforms without fork(), this function will always return %FALSE.
1286 gst_registry_fork_is_enabled (void)
1288 return _gst_enable_registry_fork;
1292 * gst_registry_fork_set_enabled:
1293 * @enabled: whether rebuilding the registry may fork
1295 * Applications might want to disable/enable the usage of fork() when rebuilding
1296 * the registry. See gst_registry_fork_is_enabled() for more information.
1298 * On platforms without fork(), this function will have no effect on the return
1299 * value of gst_registry_fork_is_enabled().
1304 gst_registry_fork_set_enabled (gboolean enabled)
1307 _gst_enable_registry_fork = enabled;
1308 #endif /* HAVE_FORK */