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"
107 #include "gstconfig.h"
110 #include <sys/types.h>
112 #include <sys/wait.h>
113 #endif /* HAVE_FORK */
114 #ifdef HAVE_SYS_UTSNAME_H
115 #include <sys/utsname.h>
121 #define WIN32_LEAN_AND_MEAN /* prevents from including too many things */
122 #include <windows.h> /* GetStdHandle, windows console */
125 #include "gst-i18n-lib.h"
126 #include <locale.h> /* for LC_ALL */
130 #define GST_CAT_DEFAULT GST_CAT_GST_INIT
132 #define MAX_PATH_SPLIT 16
133 #define GST_PLUGIN_SEPARATOR ","
135 static gboolean gst_initialized = FALSE;
136 static gboolean gst_deinitialized = FALSE;
139 static HMODULE gst_dll_handle = NULL;
142 #ifndef GST_DISABLE_REGISTRY
143 static GList *plugin_paths = NULL; /* for delayed processing in post_init */
146 #ifndef GST_DISABLE_GST_DEBUG
147 extern const gchar *priv_gst_dump_dot_dir;
151 #if defined(HAVE_FORK) && !defined(GST_HAVE_UNSAFE_FORK)
152 #define DEFAULT_FORK TRUE
154 #define DEFAULT_FORK FALSE
155 #endif /* HAVE_FORK */
157 /* set to TRUE when segfaults need to be left as is */
158 static gboolean _gst_disable_segtrap = FALSE;
160 /* control the behaviour of registry rebuild */
161 static gboolean _gst_enable_registry_fork = DEFAULT_FORK;
163 /*set to TRUE when registry needn't to be updated */
164 static gboolean _gst_disable_registry_update = FALSE;
166 static void load_plugin_func (gpointer data, gpointer user_data);
167 static gboolean init_pre (GOptionContext * context, GOptionGroup * group,
168 gpointer data, GError ** error);
169 static gboolean init_post (GOptionContext * context, GOptionGroup * group,
170 gpointer data, GError ** error);
171 #ifndef GST_DISABLE_OPTION_PARSING
172 static gboolean parse_goption_arg (const gchar * s_opt,
173 const gchar * arg, gpointer data, GError ** err);
176 static GSList *preload_plugins = NULL;
178 const gchar g_log_domain_gstreamer[] = "GStreamer";
181 debug_log_handler (const gchar * log_domain,
182 GLogLevelFlags log_level, const gchar * message, gpointer user_data)
184 g_log_default_handler (log_domain, log_level, message, user_data);
185 /* FIXME: do we still need this ? fatal errors these days are all
186 * other than core errors */
187 /* g_on_error_query (NULL); */
194 #ifndef GST_DISABLE_GST_DEBUG
205 ARG_REGISTRY_UPDATE_DISABLE,
206 ARG_REGISTRY_FORK_DISABLE
209 /* debug-spec ::= category-spec [, category-spec]*
210 * category-spec ::= category:val | val
219 #ifndef GST_DISABLE_GST_DEBUG
221 parse_debug_category (gchar * str, const gchar ** category)
238 parse_debug_level (gchar * str, gint * level)
246 if (str[0] != NUL && str[1] == NUL
247 && str[0] >= '0' && str[0] < '0' + GST_LEVEL_COUNT) {
248 *level = str[0] - '0';
256 parse_debug_list (const gchar * list)
261 g_return_if_fail (list != NULL);
263 split = g_strsplit (list, ",", 0);
265 for (walk = split; *walk; walk++) {
266 if (strchr (*walk, ':')) {
267 gchar **values = g_strsplit (*walk, ":", 2);
269 if (values[0] && values[1]) {
271 const gchar *category;
273 if (parse_debug_category (values[0], &category)
274 && parse_debug_level (values[1], &level))
275 gst_debug_set_threshold_for_name (category, level);
282 if (parse_debug_level (*walk, &level))
283 gst_debug_set_default_threshold (level);
292 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
294 if (fdwReason == DLL_PROCESS_ATTACH)
295 gst_dll_handle = (HMODULE) hinstDLL;
302 * gst_init_get_option_group:
304 * Returns a #GOptionGroup with GStreamer's argument specifications. The
305 * group is set up to use standard GOption callbacks, so when using this
306 * group in combination with GOption parsing methods, all argument parsing
307 * and initialization is automated.
309 * This function is useful if you want to integrate GStreamer with other
310 * libraries that use GOption (see g_option_context_add_group() ).
312 * If you use this function, you should make sure you initialise the GLib
313 * threading system as one of the very first things in your program
314 * (see the example at the beginning of this section).
316 * Returns: a pointer to GStreamer's option group.
320 gst_init_get_option_group (void)
322 #ifndef GST_DISABLE_OPTION_PARSING
324 static const GOptionEntry gst_args[] = {
325 {"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
326 (gpointer) parse_goption_arg, N_("Print the GStreamer version"), NULL},
327 {"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
328 (gpointer) parse_goption_arg, N_("Make all warnings fatal"), NULL},
329 #ifndef GST_DISABLE_GST_DEBUG
330 {"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
331 (gpointer) parse_goption_arg,
332 N_("Print available debug categories and exit"),
334 {"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK,
335 (gpointer) parse_goption_arg,
336 N_("Default debug level from 1 (only error) to 5 (anything) or "
339 {"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) parse_goption_arg,
340 N_("Comma-separated list of category_name:level pairs to set "
341 "specific levels for the individual categories. Example: "
342 "GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
344 {"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
345 (gpointer) parse_goption_arg, N_("Disable colored debugging output"),
347 {"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
348 (gpointer) parse_goption_arg, N_("Disable debugging"), NULL},
350 {"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
351 (gpointer) parse_goption_arg,
352 N_("Enable verbose plugin loading diagnostics"),
354 {"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK,
355 (gpointer) parse_goption_arg,
356 N_("Colon-separated paths containing plugins"), N_("PATHS")},
357 {"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK,
358 (gpointer) parse_goption_arg,
359 N_("Comma-separated list of plugins to preload in addition to the "
360 "list stored in environment variable GST_PLUGIN_PATH"),
362 {"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
363 (gpointer) parse_goption_arg,
364 N_("Disable trapping of segmentation faults during plugin loading"),
366 {"gst-disable-registry-update", 0, G_OPTION_FLAG_NO_ARG,
367 G_OPTION_ARG_CALLBACK,
368 (gpointer) parse_goption_arg,
369 N_("Disable updating the registry"),
371 {"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
372 G_OPTION_ARG_CALLBACK,
373 (gpointer) parse_goption_arg,
374 N_("Disable the use of fork() while scanning the registry"),
379 /* The GLib threading system must be initialised before calling any other
380 * GLib function according to the documentation; if the application hasn't
381 * called gst_init() yet or initialised the threading system otherwise, we
382 * better issue a warning here (since chances are high that the application
383 * has already called other GLib functions such as g_option_context_new() */
384 if (!g_thread_supported ()) {
385 g_warning ("The GStreamer function gst_init_get_option_group() was\n"
386 "\tcalled, but the GLib threading system has not been initialised\n"
387 "\tyet, something that must happen before any other GLib function\n"
388 "\tis called. The application needs to be fixed so that it calls\n"
389 "\t if (!g_thread_supported ()) g_thread_init(NULL);\n"
390 "\tas very first thing in its main() function. Please file a bug\n"
391 "\tagainst this application.");
392 g_thread_init (NULL);
395 group = g_option_group_new ("gst", _("GStreamer Options"),
396 _("Show GStreamer Options"), NULL, NULL);
397 g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
398 (GOptionParseFunc) init_post);
400 g_option_group_add_entries (group, gst_args);
401 g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
411 * @argc: pointer to application's argc
412 * @argv: pointer to application's argv
413 * @err: pointer to a #GError to which a message will be posted on error
415 * Initializes the GStreamer library, setting up internal path lists,
416 * registering built-in elements, and loading standard plugins.
418 * This function will return %FALSE if GStreamer could not be initialized
419 * for some reason. If you want your program to fail fatally,
420 * use gst_init() instead.
422 * This function should be called before calling any other GLib functions. If
423 * this is not an option, your program must initialise the GLib thread system
424 * using g_thread_init() before any other GLib functions are called.
426 * Returns: %TRUE if GStreamer could be initialized.
429 gst_init_check (int *argc, char **argv[], GError ** err)
431 #ifndef GST_DISABLE_OPTION_PARSING
437 if (!g_thread_supported ())
438 g_thread_init (NULL);
440 if (gst_initialized) {
441 GST_DEBUG ("already initialized gst");
444 #ifndef GST_DISABLE_OPTION_PARSING
445 ctx = g_option_context_new ("- GStreamer initialization");
446 g_option_context_set_ignore_unknown_options (ctx, TRUE);
447 group = gst_init_get_option_group ();
448 g_option_context_add_group (ctx, group);
449 res = g_option_context_parse (ctx, argc, argv, err);
450 g_option_context_free (ctx);
452 init_pre (NULL, NULL, NULL, NULL);
453 init_post (NULL, NULL, NULL, NULL);
457 gst_initialized = res;
460 GST_INFO ("initialized GStreamer successfully");
462 GST_INFO ("failed to initialize GStreamer");
470 * @argc: pointer to application's argc
471 * @argv: pointer to application's argv
473 * Initializes the GStreamer library, setting up internal path lists,
474 * registering built-in elements, and loading standard plugins.
476 * This function should be called before calling any other GLib functions. If
477 * this is not an option, your program must initialise the GLib thread system
478 * using g_thread_init() before any other GLib functions are called.
481 * This function will terminate your program if it was unable to initialize
482 * GStreamer for some reason. If you want your program to fall back,
483 * use gst_init_check() instead.
486 * WARNING: This function does not work in the same way as corresponding
487 * functions in other glib-style libraries, such as gtk_init(). In
488 * particular, unknown command line options cause this function to
489 * abort program execution.
492 gst_init (int *argc, char **argv[])
496 if (!gst_init_check (argc, argv, &err)) {
497 g_print ("Could not initialize GStreamer: %s\n",
498 err ? err->message : "unknown error occurred");
506 #ifndef GST_DISABLE_REGISTRY
508 add_path_func (gpointer data, gpointer user_data)
510 GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
511 plugin_paths = g_list_append (plugin_paths, g_strdup (data));
515 #ifndef GST_DISABLE_OPTION_PARSING
517 prepare_for_load_plugin_func (gpointer data, gpointer user_data)
519 preload_plugins = g_slist_prepend (preload_plugins, g_strdup (data));
524 load_plugin_func (gpointer data, gpointer user_data)
527 const gchar *filename;
530 filename = (const gchar *) data;
532 plugin = gst_plugin_load_file (filename, &err);
535 GST_INFO ("Loaded plugin: \"%s\"", filename);
537 gst_default_registry_add_plugin (plugin);
540 /* Report error to user, and free error */
541 GST_ERROR ("Failed to load plugin: %s", err->message);
544 GST_WARNING ("Failed to load plugin: \"%s\"", filename);
549 #ifndef GST_DISABLE_OPTION_PARSING
551 split_and_iterate (const gchar * stringlist, gchar * separator, GFunc iterator,
556 gchar *lastlist = g_strdup (stringlist);
559 strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
564 iterator (strings[j], user_data);
565 if (++j == MAX_PATH_SPLIT) {
566 lastlist = g_strdup (strings[j]);
571 g_strfreev (strings);
576 /* we have no fail cases yet, but maybe in the future */
578 init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
581 if (gst_initialized) {
582 GST_DEBUG ("already initialized");
586 /* GStreamer was built against a GLib >= 2.8 and is therefore not doing
587 * the refcount hack. Check that it isn't being run against an older GLib */
588 if (glib_major_version < 2 ||
589 (glib_major_version == 2 && glib_minor_version < 8)) {
590 g_warning ("GStreamer was compiled against GLib %d.%d.%d but is running"
591 " against %d.%d.%d. This will cause reference counting issues",
592 GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION,
593 glib_major_version, glib_minor_version, glib_micro_version);
598 /* we need threading to be enabled right here */
599 g_assert (g_thread_supported ());
603 setlocale (LC_ALL, "");
604 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
605 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
606 #endif /* ENABLE_NLS */
608 #ifndef GST_DISABLE_GST_DEBUG
610 const gchar *debug_list;
612 if (g_getenv ("GST_DEBUG_NO_COLOR") != NULL)
613 gst_debug_set_colored (FALSE);
615 debug_list = g_getenv ("GST_DEBUG");
617 parse_debug_list (debug_list);
621 priv_gst_dump_dot_dir = g_getenv ("GST_DEBUG_DUMP_DOT_DIR");
623 /* This is the earliest we can make stuff show up in the logs.
624 * So give some useful info about GStreamer here */
625 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
626 GST_INFO ("Using library installed in %s", LIBDIR);
628 /* Print some basic system details if possible (OS/architecture) */
629 #ifdef HAVE_SYS_UTSNAME_H
631 struct utsname sys_details;
633 if (uname (&sys_details) == 0) {
634 GST_INFO ("%s %s %s %s %s", sys_details.sysname,
635 sys_details.nodename, sys_details.release, sys_details.version,
636 sys_details.machine);
645 gst_register_core_elements (GstPlugin * plugin)
647 /* register some standard builtin types */
648 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
650 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
653 g_assert_not_reached ();
658 #ifndef GST_DISABLE_REGISTRY
662 REGISTRY_SCAN_AND_UPDATE_FAILURE = 0,
663 REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED,
664 REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED
665 } GstRegistryScanAndUpdateResult;
668 * scan_and_update_registry:
669 * @default_registry: the #GstRegistry
670 * @registry_file: registry filename
671 * @write_changes: write registry if it has changed?
673 * Scans for registry changes and eventually updates the registry cache.
675 * Return: %REGISTRY_SCAN_AND_UPDATE_FAILURE if the registry could not scanned
676 * or updated, %REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED if the
677 * registry is clean and %REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED if
678 * it has been updated and the cache needs to be re-read.
680 static GstRegistryScanAndUpdateResult
681 scan_and_update_registry (GstRegistry * default_registry,
682 const gchar * registry_file, gboolean write_changes, GError ** error)
684 const gchar *plugin_path;
685 gboolean changed = FALSE;
688 GST_INFO ("Validating registry cache: %s", registry_file);
689 /* It sounds tempting to just compare the mtime of directories with the mtime
690 * of the registry cache, but it does not work. It would not catch updated
691 * plugins, which might bring more or less features.
694 /* scan paths specified via --gst-plugin-path */
695 GST_DEBUG ("scanning paths added via --gst-plugin-path");
696 for (l = plugin_paths; l != NULL; l = l->next) {
697 GST_INFO ("Scanning plugin path: \"%s\"", (gchar *) l->data);
698 changed |= gst_registry_scan_path (default_registry, (gchar *) l->data);
700 /* keep plugin_paths around in case a re-scan is forced later on */
702 /* GST_PLUGIN_PATH specifies a list of directories to scan for
703 * additional plugins. These take precedence over the system plugins */
704 plugin_path = g_getenv ("GST_PLUGIN_PATH");
709 GST_DEBUG ("GST_PLUGIN_PATH set to %s", plugin_path);
710 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
711 for (i = 0; list[i]; i++) {
712 changed |= gst_registry_scan_path (default_registry, list[i]);
716 GST_DEBUG ("GST_PLUGIN_PATH not set");
719 /* GST_PLUGIN_SYSTEM_PATH specifies a list of plugins that are always
720 * loaded by default. If not set, this defaults to the system-installed
721 * path, and the plugins installed in the user's home directory */
722 plugin_path = g_getenv ("GST_PLUGIN_SYSTEM_PATH");
723 if (plugin_path == NULL) {
726 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH not set");
728 /* plugins in the user's home directory take precedence over
729 * system-installed ones */
730 home_plugins = g_build_filename (g_get_home_dir (),
731 ".gstreamer-" GST_MAJORMINOR, "plugins", NULL);
732 GST_DEBUG ("scanning home plugins %s", home_plugins);
733 changed |= gst_registry_scan_path (default_registry, home_plugins);
734 g_free (home_plugins);
736 /* add the main (installed) library path */
737 GST_DEBUG ("scanning main plugins %s", PLUGINDIR);
738 changed |= gst_registry_scan_path (default_registry, PLUGINDIR);
745 base_dir = g_win32_get_package_installation_directory_of_module (
748 dir = g_build_filename (base_dir, "lib", "gstreamer-0.10", NULL);
749 GST_DEBUG ("scanning DLL dir %s", dir);
751 changed |= gst_registry_scan_path (default_registry, dir);
761 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path);
762 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
763 for (i = 0; list[i]; i++) {
764 changed |= gst_registry_scan_path (default_registry, list[i]);
769 /* Remove cached plugins so stale info is cleared. */
770 changed |= _priv_gst_registry_remove_cache_plugins (default_registry);
773 GST_INFO ("Registry cache has not changed");
774 return REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED;
777 if (!write_changes) {
778 GST_INFO ("Registry cache changed, but writing is disabled. Not writing.");
779 return REGISTRY_SCAN_AND_UPDATE_FAILURE;
782 GST_INFO ("Registry cache changed. Writing new registry cache");
783 if (!gst_registry_binary_write_cache (default_registry, registry_file)) {
784 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
785 _("Error writing registry cache to %s: %s"),
786 registry_file, g_strerror (errno));
787 return REGISTRY_SCAN_AND_UPDATE_FAILURE;
790 GST_INFO ("Registry cache written successfully");
791 return REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED;
795 ensure_current_registry_nonforking (GstRegistry * default_registry,
796 const gchar * registry_file, GError ** error)
798 /* fork() not available */
799 GST_DEBUG ("Updating registry cache in-process");
800 scan_and_update_registry (default_registry, registry_file, TRUE, error);
804 /* when forking is not available this function always does nothing but return
807 ensure_current_registry_forking (GstRegistry * default_registry,
808 const gchar * registry_file, GError ** error)
815 /* We fork here, and let the child read and possibly rebuild the registry.
816 * After that, the parent will re-read the freshly generated registry. */
817 GST_DEBUG ("forking to update registry");
819 if (pipe (pfd) == -1) {
820 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
821 _("Error re-scanning registry %s: %s"),
822 ", could not create pipes. Error", g_strerror (errno));
828 GST_ERROR ("Failed to fork()");
829 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
830 _("Error re-scanning registry %s: %s"),
831 ", failed to fork. Error", g_strerror (errno));
838 /* this is the child. Close the read pipe */
839 (void) close (pfd[0]);
841 GST_DEBUG ("child reading registry cache");
843 scan_and_update_registry (default_registry, registry_file, TRUE, NULL);
845 /* need to use _exit, so that any exit handlers registered don't
846 * bring down the main program */
847 GST_DEBUG ("child exiting: %d", result_code);
849 /* make valgrind happy (yes, you can call it insane) */
850 g_free ((char *) registry_file);
852 /* write a result byte to the pipe */
854 ret = write (pfd[1], &result_code, sizeof (result_code));
855 } while (ret == -1 && errno == EINTR);
856 /* if ret == -1 now, we could not write to pipe, probably
857 * means parent has exited before us */
858 (void) close (pfd[1]);
864 /* parent. Close write pipe */
865 (void) close (pfd[1]);
867 /* Wait for result from the pipe */
868 GST_DEBUG ("Waiting for data from child");
870 ret = read (pfd[0], &result_code, sizeof (result_code));
871 } while (ret == -1 && errno == EINTR);
874 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
875 _("Error re-scanning registry %s: %s"),
876 ", read returned error", g_strerror (errno));
880 (void) close (pfd[0]);
882 /* Wait to ensure the child is reaped, but ignore the result */
883 GST_DEBUG ("parent waiting on child");
884 waitpid (pid, NULL, 0);
885 GST_DEBUG ("parent done waiting on child");
888 GST_ERROR ("child did not exit normally, terminated by signal");
889 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
890 _("Error re-scanning registry %s"), ", child terminated by signal");
894 if (result_code == REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED) {
895 GST_DEBUG ("Child succeeded. Parent reading registry cache");
896 _priv_gst_registry_remove_cache_plugins (default_registry);
897 gst_registry_binary_read_cache (default_registry, registry_file);
898 } else if (result_code == REGISTRY_SCAN_AND_UPDATE_FAILURE) {
899 GST_DEBUG ("Child failed. Parent re-scanning registry, ignoring errors.");
900 scan_and_update_registry (default_registry, registry_file, FALSE, NULL);
903 #endif /* HAVE_FORK */
908 ensure_current_registry (GError ** error)
910 gchar *registry_file;
911 GstRegistry *default_registry;
917 default_registry = gst_registry_get_default ();
918 registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
919 if (registry_file == NULL) {
920 registry_file = g_build_filename (g_get_home_dir (),
921 ".gstreamer-" GST_MAJORMINOR, "registry." HOST_CPU ".bin", NULL);
924 GST_INFO ("reading registry cache: %s", registry_file);
925 have_cache = gst_registry_binary_read_cache (default_registry, registry_file);
928 do_update = !_gst_disable_registry_update;
930 const gchar *update_env;
932 if ((update_env = g_getenv ("GST_REGISTRY_UPDATE"))) {
933 /* do update for any value different from "no" */
934 do_update = (strcmp (update_env, "no") != 0);
942 /* first see if forking is enabled */
943 do_fork = _gst_enable_registry_fork;
945 const gchar *fork_env;
947 /* forking enabled, see if it is disabled with an env var */
948 if ((fork_env = g_getenv ("GST_REGISTRY_FORK"))) {
949 /* fork enabled for any value different from "no" */
950 do_fork = strcmp (fork_env, "no") != 0;
954 /* now check registry with or without forking */
956 GST_DEBUG ("forking for registry rebuild");
957 ret = ensure_current_registry_forking (default_registry, registry_file,
960 GST_DEBUG ("requested not to fork for registry rebuild");
961 ret = ensure_current_registry_nonforking (default_registry, registry_file,
966 g_free (registry_file);
967 GST_INFO ("registry reading and updating done, result = %d", ret);
971 #endif /* GST_DISABLE_REGISTRY */
975 * - initalization of threads if we use them
978 * - initializes gst_format
979 * - registers a bunch of types for gst_objects
981 * - we don't have cases yet where this fails, but in the future
982 * we might and then it's nice to be able to return that
985 init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
990 #ifndef GST_DISABLE_TRACE
992 #endif /* GST_DISABLE_TRACE */
994 if (gst_initialized) {
995 GST_DEBUG ("already initialized");
999 llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
1000 g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
1002 _priv_gst_quarks_initialize ();
1003 _gst_format_initialize ();
1004 _gst_query_initialize ();
1005 g_type_class_ref (gst_object_get_type ());
1006 g_type_class_ref (gst_pad_get_type ());
1007 g_type_class_ref (gst_element_factory_get_type ());
1008 g_type_class_ref (gst_element_get_type ());
1009 g_type_class_ref (gst_type_find_factory_get_type ());
1010 g_type_class_ref (gst_bin_get_type ());
1011 g_type_class_ref (gst_bus_get_type ());
1012 g_type_class_ref (gst_task_get_type ());
1013 g_type_class_ref (gst_clock_get_type ());
1015 g_type_class_ref (gst_index_factory_get_type ());
1016 gst_uri_handler_get_type ();
1018 g_type_class_ref (gst_object_flags_get_type ());
1019 g_type_class_ref (gst_bin_flags_get_type ());
1020 g_type_class_ref (gst_buffer_flag_get_type ());
1021 g_type_class_ref (gst_buffer_copy_flags_get_type ());
1022 g_type_class_ref (gst_bus_flags_get_type ());
1023 g_type_class_ref (gst_bus_sync_reply_get_type ());
1024 g_type_class_ref (gst_caps_flags_get_type ());
1025 g_type_class_ref (gst_clock_return_get_type ());
1026 g_type_class_ref (gst_clock_entry_type_get_type ());
1027 g_type_class_ref (gst_clock_flags_get_type ());
1028 g_type_class_ref (gst_clock_type_get_type ());
1029 g_type_class_ref (gst_debug_graph_details_get_type ());
1030 g_type_class_ref (gst_state_get_type ());
1031 g_type_class_ref (gst_state_change_return_get_type ());
1032 g_type_class_ref (gst_state_change_get_type ());
1033 g_type_class_ref (gst_element_flags_get_type ());
1034 g_type_class_ref (gst_core_error_get_type ());
1035 g_type_class_ref (gst_library_error_get_type ());
1036 g_type_class_ref (gst_resource_error_get_type ());
1037 g_type_class_ref (gst_stream_error_get_type ());
1038 g_type_class_ref (gst_event_type_flags_get_type ());
1039 g_type_class_ref (gst_event_type_get_type ());
1040 g_type_class_ref (gst_seek_type_get_type ());
1041 g_type_class_ref (gst_seek_flags_get_type ());
1042 g_type_class_ref (gst_format_get_type ());
1043 g_type_class_ref (gst_index_certainty_get_type ());
1044 g_type_class_ref (gst_index_entry_type_get_type ());
1045 g_type_class_ref (gst_index_lookup_method_get_type ());
1046 g_type_class_ref (gst_assoc_flags_get_type ());
1047 g_type_class_ref (gst_index_resolver_method_get_type ());
1048 g_type_class_ref (gst_index_flags_get_type ());
1049 g_type_class_ref (gst_debug_level_get_type ());
1050 g_type_class_ref (gst_debug_color_flags_get_type ());
1051 g_type_class_ref (gst_iterator_result_get_type ());
1052 g_type_class_ref (gst_iterator_item_get_type ());
1053 g_type_class_ref (gst_message_type_get_type ());
1054 g_type_class_ref (gst_mini_object_flags_get_type ());
1055 g_type_class_ref (gst_pad_link_return_get_type ());
1056 g_type_class_ref (gst_flow_return_get_type ());
1057 g_type_class_ref (gst_activate_mode_get_type ());
1058 g_type_class_ref (gst_pad_direction_get_type ());
1059 g_type_class_ref (gst_pad_flags_get_type ());
1060 g_type_class_ref (gst_pad_presence_get_type ());
1061 g_type_class_ref (gst_pad_template_flags_get_type ());
1062 g_type_class_ref (gst_pipeline_flags_get_type ());
1063 g_type_class_ref (gst_plugin_error_get_type ());
1064 g_type_class_ref (gst_plugin_flags_get_type ());
1065 g_type_class_ref (gst_plugin_dependency_flags_get_type ());
1066 g_type_class_ref (gst_rank_get_type ());
1067 g_type_class_ref (gst_query_type_get_type ());
1068 g_type_class_ref (gst_buffering_mode_get_type ());
1069 g_type_class_ref (gst_stream_status_type_get_type ());
1070 g_type_class_ref (gst_structure_change_type_get_type ());
1071 g_type_class_ref (gst_tag_merge_mode_get_type ());
1072 g_type_class_ref (gst_tag_flag_get_type ());
1073 g_type_class_ref (gst_task_pool_get_type ());
1074 g_type_class_ref (gst_task_state_get_type ());
1075 g_type_class_ref (gst_alloc_trace_flags_get_type ());
1076 g_type_class_ref (gst_type_find_probability_get_type ());
1077 g_type_class_ref (gst_uri_type_get_type ());
1078 g_type_class_ref (gst_parse_error_get_type ());
1079 g_type_class_ref (gst_parse_flags_get_type ());
1080 g_type_class_ref (gst_search_mode_get_type ());
1082 gst_structure_get_type ();
1083 _gst_value_initialize ();
1084 g_type_class_ref (gst_param_spec_fraction_get_type ());
1085 gst_caps_get_type ();
1086 _gst_event_initialize ();
1087 _gst_buffer_initialize ();
1088 _gst_buffer_list_initialize ();
1089 _gst_message_initialize ();
1090 _gst_tag_initialize ();
1092 _gst_plugin_initialize ();
1094 gst_g_error_get_type ();
1096 /* register core plugins */
1097 gst_plugin_register_static (GST_VERSION_MAJOR, GST_VERSION_MINOR,
1098 "staticelements", "core elements linked into the GStreamer library",
1099 gst_register_core_elements, VERSION, GST_LICENSE, PACKAGE,
1100 GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
1103 * Any errors happening below this point are non-fatal, we therefore mark
1104 * gstreamer as being initialized, since it is the case from a plugin point of
1107 * If anything fails, it will be put back to FALSE in gst_init_check().
1108 * This allows some special plugins that would call gst_init() to not cause a
1109 * looping effect (i.e. initializing GStreamer twice).
1111 gst_initialized = TRUE;
1113 #ifndef GST_DISABLE_REGISTRY
1114 if (!ensure_current_registry (error))
1116 #endif /* GST_DISABLE_REGISTRY */
1118 /* if we need to preload plugins, do so now */
1119 g_slist_foreach (preload_plugins, load_plugin_func, NULL);
1120 /* keep preload_plugins around in case a re-scan is forced later on */
1122 #ifndef GST_DISABLE_TRACE
1124 if (_gst_trace_on) {
1125 gst_trace = gst_trace_new ("gst.trace", 1024);
1126 gst_trace_set_default (gst_trace);
1128 #endif /* GST_DISABLE_TRACE */
1133 #ifndef GST_DISABLE_GST_DEBUG
1135 select_all (GstPlugin * plugin, gpointer user_data)
1141 sort_by_category_name (gconstpointer a, gconstpointer b)
1143 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
1144 gst_debug_category_get_name ((GstDebugCategory *) b));
1148 gst_debug_help (void)
1150 GSList *list, *walk;
1153 /* Need to ensure the registry is loaded to get debug categories */
1154 if (!init_post (NULL, NULL, NULL, NULL))
1157 list2 = gst_registry_plugin_filter (gst_registry_get_default (),
1158 select_all, FALSE, NULL);
1160 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
1161 for (g = list2; g; g = g_list_next (g)) {
1162 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
1164 gst_plugin_load (plugin);
1166 g_list_free (list2);
1168 list = gst_debug_get_all_categories ();
1169 walk = list = g_slist_sort (list, sort_by_category_name);
1172 g_print ("name level description\n");
1173 g_print ("---------------------+--------+--------------------------------\n");
1176 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
1178 if (gst_debug_is_colored ()) {
1180 gint color = gst_debug_construct_win_color (cat->color);
1181 const gint clear = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
1183 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
1184 g_print ("%-20s", gst_debug_category_get_name (cat));
1185 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
1186 g_print (" %1d %s ", gst_debug_category_get_threshold (cat),
1187 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)));
1188 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
1189 g_print ("%s", gst_debug_category_get_description (cat));
1190 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
1192 #else /* G_OS_WIN32 */
1193 gchar *color = gst_debug_construct_term_color (cat->color);
1195 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
1197 gst_debug_category_get_name (cat),
1198 gst_debug_category_get_threshold (cat),
1199 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
1200 color, gst_debug_category_get_description (cat));
1202 #endif /* G_OS_WIN32 */
1204 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
1205 gst_debug_category_get_threshold (cat),
1206 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
1207 gst_debug_category_get_description (cat));
1209 walk = g_slist_next (walk);
1211 g_slist_free (list);
1216 #ifndef GST_DISABLE_OPTION_PARSING
1218 parse_one_option (gint opt, const gchar * arg, GError ** err)
1222 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
1224 case ARG_FATAL_WARNINGS:{
1225 GLogLevelFlags fatal_mask;
1227 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
1228 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
1229 g_log_set_always_fatal (fatal_mask);
1232 #ifndef GST_DISABLE_GST_DEBUG
1233 case ARG_DEBUG_LEVEL:{
1236 tmp = strtol (arg, NULL, 0);
1237 if (tmp >= 0 && tmp < GST_LEVEL_COUNT) {
1238 gst_debug_set_default_threshold (tmp);
1243 parse_debug_list (arg);
1245 case ARG_DEBUG_NO_COLOR:
1246 gst_debug_set_colored (FALSE);
1248 case ARG_DEBUG_DISABLE:
1249 gst_debug_set_active (FALSE);
1251 case ARG_DEBUG_HELP:
1255 case ARG_PLUGIN_SPEW:
1257 case ARG_PLUGIN_PATH:
1258 #ifndef GST_DISABLE_REGISTRY
1259 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
1260 #endif /* GST_DISABLE_REGISTRY */
1262 case ARG_PLUGIN_LOAD:
1263 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
1265 case ARG_SEGTRAP_DISABLE:
1266 _gst_disable_segtrap = TRUE;
1268 case ARG_REGISTRY_UPDATE_DISABLE:
1269 _gst_disable_registry_update = TRUE;
1271 case ARG_REGISTRY_FORK_DISABLE:
1272 _gst_enable_registry_fork = FALSE;
1275 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
1276 _("Unknown option"));
1284 parse_goption_arg (const gchar * opt,
1285 const gchar * arg, gpointer data, GError ** err)
1293 "--gst-version", ARG_VERSION}, {
1294 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
1295 #ifndef GST_DISABLE_GST_DEBUG
1297 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
1298 "--gst-debug", ARG_DEBUG}, {
1299 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
1300 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
1301 "--gst-debug-help", ARG_DEBUG_HELP},
1304 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
1305 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
1306 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
1307 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
1308 "--gst-disable-registry-update", ARG_REGISTRY_UPDATE_DISABLE}, {
1309 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
1314 for (n = 0; options[n].opt; n++) {
1315 if (!strcmp (opt, options[n].opt)) {
1316 val = options[n].val;
1321 return parse_one_option (val, arg, err);
1325 extern GstRegistry *_gst_registry_default;
1330 * Clean up any resources created by GStreamer in gst_init().
1332 * It is normally not needed to call this function in a normal application
1333 * as the resources will automatically be freed when the program terminates.
1334 * This function is therefore mostly used by testsuites and other memory
1337 * After this call GStreamer (including this method) should not be used anymore.
1344 GST_INFO ("deinitializing GStreamer");
1346 if (gst_deinitialized) {
1347 GST_DEBUG ("already deinitialized");
1351 g_slist_foreach (preload_plugins, (GFunc) g_free, NULL);
1352 g_slist_free (preload_plugins);
1353 preload_plugins = NULL;
1355 #ifndef GST_DISABLE_REGISTRY
1356 g_list_foreach (plugin_paths, (GFunc) g_free, NULL);
1357 g_list_free (plugin_paths);
1358 plugin_paths = NULL;
1361 clock = gst_system_clock_obtain ();
1362 gst_object_unref (clock);
1363 gst_object_unref (clock);
1365 _priv_gst_registry_cleanup ();
1367 g_type_class_unref (g_type_class_peek (gst_object_get_type ()));
1368 g_type_class_unref (g_type_class_peek (gst_pad_get_type ()));
1369 g_type_class_unref (g_type_class_peek (gst_element_factory_get_type ()));
1370 g_type_class_unref (g_type_class_peek (gst_element_get_type ()));
1371 g_type_class_unref (g_type_class_peek (gst_type_find_factory_get_type ()));
1372 g_type_class_unref (g_type_class_peek (gst_bin_get_type ()));
1373 g_type_class_unref (g_type_class_peek (gst_bus_get_type ()));
1374 g_type_class_unref (g_type_class_peek (gst_task_get_type ()));
1375 g_type_class_unref (g_type_class_peek (gst_index_factory_get_type ()));
1376 g_type_class_unref (g_type_class_peek (gst_object_flags_get_type ()));
1377 g_type_class_unref (g_type_class_peek (gst_bin_flags_get_type ()));
1378 g_type_class_unref (g_type_class_peek (gst_buffer_flag_get_type ()));
1379 g_type_class_unref (g_type_class_peek (gst_buffer_copy_flags_get_type ()));
1380 g_type_class_unref (g_type_class_peek (gst_bus_flags_get_type ()));
1381 g_type_class_unref (g_type_class_peek (gst_bus_sync_reply_get_type ()));
1382 g_type_class_unref (g_type_class_peek (gst_caps_flags_get_type ()));
1383 g_type_class_unref (g_type_class_peek (gst_clock_return_get_type ()));
1384 g_type_class_unref (g_type_class_peek (gst_clock_entry_type_get_type ()));
1385 g_type_class_unref (g_type_class_peek (gst_clock_flags_get_type ()));
1386 g_type_class_unref (g_type_class_peek (gst_debug_graph_details_get_type ()));
1387 g_type_class_unref (g_type_class_peek (gst_state_get_type ()));
1388 g_type_class_unref (g_type_class_peek (gst_state_change_return_get_type ()));
1389 g_type_class_unref (g_type_class_peek (gst_state_change_get_type ()));
1390 g_type_class_unref (g_type_class_peek (gst_element_flags_get_type ()));
1391 g_type_class_unref (g_type_class_peek (gst_core_error_get_type ()));
1392 g_type_class_unref (g_type_class_peek (gst_library_error_get_type ()));
1393 g_type_class_unref (g_type_class_peek (gst_resource_error_get_type ()));
1394 g_type_class_unref (g_type_class_peek (gst_stream_error_get_type ()));
1395 g_type_class_unref (g_type_class_peek (gst_event_type_flags_get_type ()));
1396 g_type_class_unref (g_type_class_peek (gst_event_type_get_type ()));
1397 g_type_class_unref (g_type_class_peek (gst_seek_type_get_type ()));
1398 g_type_class_unref (g_type_class_peek (gst_seek_flags_get_type ()));
1399 g_type_class_unref (g_type_class_peek (gst_format_get_type ()));
1400 g_type_class_unref (g_type_class_peek (gst_index_certainty_get_type ()));
1401 g_type_class_unref (g_type_class_peek (gst_index_entry_type_get_type ()));
1402 g_type_class_unref (g_type_class_peek (gst_index_lookup_method_get_type ()));
1403 g_type_class_unref (g_type_class_peek (gst_assoc_flags_get_type ()));
1404 g_type_class_unref (g_type_class_peek (gst_index_resolver_method_get_type
1406 g_type_class_unref (g_type_class_peek (gst_index_flags_get_type ()));
1407 g_type_class_unref (g_type_class_peek (gst_debug_level_get_type ()));
1408 g_type_class_unref (g_type_class_peek (gst_debug_color_flags_get_type ()));
1409 g_type_class_unref (g_type_class_peek (gst_iterator_result_get_type ()));
1410 g_type_class_unref (g_type_class_peek (gst_iterator_item_get_type ()));
1411 g_type_class_unref (g_type_class_peek (gst_message_type_get_type ()));
1412 g_type_class_unref (g_type_class_peek (gst_mini_object_flags_get_type ()));
1413 g_type_class_unref (g_type_class_peek (gst_pad_link_return_get_type ()));
1414 g_type_class_unref (g_type_class_peek (gst_flow_return_get_type ()));
1415 g_type_class_unref (g_type_class_peek (gst_activate_mode_get_type ()));
1416 g_type_class_unref (g_type_class_peek (gst_pad_direction_get_type ()));
1417 g_type_class_unref (g_type_class_peek (gst_pad_flags_get_type ()));
1418 g_type_class_unref (g_type_class_peek (gst_pad_presence_get_type ()));
1419 g_type_class_unref (g_type_class_peek (gst_pad_template_flags_get_type ()));
1420 g_type_class_unref (g_type_class_peek (gst_pipeline_flags_get_type ()));
1421 g_type_class_unref (g_type_class_peek (gst_plugin_error_get_type ()));
1422 g_type_class_unref (g_type_class_peek (gst_plugin_flags_get_type ()));
1423 g_type_class_unref (g_type_class_peek (gst_rank_get_type ()));
1424 g_type_class_unref (g_type_class_peek (gst_query_type_get_type ()));
1425 g_type_class_unref (g_type_class_peek (gst_buffering_mode_get_type ()));
1426 g_type_class_unref (g_type_class_peek (gst_tag_merge_mode_get_type ()));
1427 g_type_class_unref (g_type_class_peek (gst_tag_flag_get_type ()));
1428 g_type_class_unref (g_type_class_peek (gst_task_state_get_type ()));
1429 g_type_class_unref (g_type_class_peek (gst_alloc_trace_flags_get_type ()));
1430 g_type_class_unref (g_type_class_peek (gst_type_find_probability_get_type
1432 g_type_class_unref (g_type_class_peek (gst_uri_type_get_type ()));
1433 g_type_class_unref (g_type_class_peek (gst_parse_error_get_type ()));
1434 g_type_class_unref (g_type_class_peek (gst_param_spec_fraction_get_type ()));
1436 gst_deinitialized = TRUE;
1437 GST_INFO ("deinitialized GStreamer");
1442 * @major: pointer to a guint to store the major version number
1443 * @minor: pointer to a guint to store the minor version number
1444 * @micro: pointer to a guint to store the micro version number
1445 * @nano: pointer to a guint to store the nano version number
1447 * Gets the version number of the GStreamer library.
1450 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1452 g_return_if_fail (major);
1453 g_return_if_fail (minor);
1454 g_return_if_fail (micro);
1455 g_return_if_fail (nano);
1457 *major = GST_VERSION_MAJOR;
1458 *minor = GST_VERSION_MINOR;
1459 *micro = GST_VERSION_MICRO;
1460 *nano = GST_VERSION_NANO;
1464 * gst_version_string:
1466 * This function returns a string that is useful for describing this version
1467 * of GStreamer to the outside world: user agent strings, logging, ...
1469 * Returns: a newly allocated string describing this version of GStreamer.
1473 gst_version_string ()
1475 guint major, minor, micro, nano;
1477 gst_version (&major, &minor, µ, &nano);
1479 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1481 return g_strdup_printf ("GStreamer %d.%d.%d (GIT)", major, minor, micro);
1483 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1488 * gst_segtrap_is_enabled:
1490 * Some functions in the GStreamer core might install a custom SIGSEGV handler
1491 * to better catch and report errors to the application. Currently this feature
1492 * is enabled by default when loading plugins.
1494 * Applications might want to disable this behaviour with the
1495 * gst_segtrap_set_enabled() function. This is typically done if the application
1496 * wants to install its own handler without GStreamer interfering.
1498 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1503 gst_segtrap_is_enabled (void)
1505 /* yeps, it's enabled when it's not disabled */
1506 return !_gst_disable_segtrap;
1510 * gst_segtrap_set_enabled:
1511 * @enabled: whether a custom SIGSEGV handler should be installed.
1513 * Applications might want to disable/enable the SIGSEGV handling of
1514 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1519 gst_segtrap_set_enabled (gboolean enabled)
1521 _gst_disable_segtrap = !enabled;
1525 * gst_registry_fork_is_enabled:
1527 * By default GStreamer will perform a fork() when scanning and rebuilding the
1530 * Applications might want to disable this behaviour with the
1531 * gst_registry_fork_set_enabled() function.
1533 * Returns: %TRUE if GStreamer will use fork() when rebuilding the registry. On
1534 * platforms without fork(), this function will always return %FALSE.
1539 gst_registry_fork_is_enabled (void)
1541 return _gst_enable_registry_fork;
1545 * gst_registry_fork_set_enabled:
1546 * @enabled: whether rebuilding the registry may fork
1548 * Applications might want to disable/enable the usage of fork() when rebuilding
1549 * the registry. See gst_registry_fork_is_enabled() for more information.
1551 * On platforms without fork(), this function will have no effect on the return
1552 * value of gst_registry_fork_is_enabled().
1557 gst_registry_fork_set_enabled (gboolean enabled)
1560 _gst_enable_registry_fork = enabled;
1561 #endif /* HAVE_FORK */
1566 * gst_update_registry:
1568 * Forces GStreamer to re-scan its plugin paths and update the default
1571 * Applications will almost never need to call this function, it is only
1572 * useful if the application knows new plugins have been installed (or old
1573 * ones removed) since the start of the application (or, to be precise, the
1574 * first call to gst_init()) and the application wants to make use of any
1575 * newly-installed plugins without restarting the application.
1577 * Applications should assume that the registry update is neither atomic nor
1578 * thread-safe and should therefore not have any dynamic pipelines running
1579 * (including the playbin and decodebin elements) and should also not create
1580 * any elements or access the GStreamer registry while the update is in
1583 * Note that this function may block for a significant amount of time.
1585 * Returns: %TRUE if the registry has been updated successfully (does not
1586 * imply that there were changes), otherwise %FALSE.
1591 gst_update_registry (void)
1593 gboolean res = FALSE;
1595 #ifndef GST_DISABLE_REGISTRY
1598 res = ensure_current_registry (&err);
1600 GST_WARNING ("registry update failed: %s", err->message);
1603 GST_LOG ("registry update succeeded");
1606 if (preload_plugins) {
1607 g_slist_foreach (preload_plugins, load_plugin_func, NULL);
1610 GST_WARNING ("registry update failed: %s", "registry disabled");
1611 #endif /* GST_DISABLE_REGISTRY */