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;
138 #ifndef GST_DISABLE_REGISTRY
139 static GList *plugin_paths = NULL; /* for delayed processing in post_init */
142 #ifndef GST_DISABLE_GST_DEBUG
143 extern const gchar *priv_gst_dump_dot_dir;
147 #if defined(HAVE_FORK) && !defined(GST_HAVE_UNSAFE_FORK)
148 #define DEFAULT_FORK TRUE
150 #define DEFAULT_FORK FALSE
151 #endif /* HAVE_FORK */
153 /* set to TRUE when segfaults need to be left as is */
154 static gboolean _gst_disable_segtrap = FALSE;
156 /* control the behaviour of registry rebuild */
157 static gboolean _gst_enable_registry_fork = DEFAULT_FORK;
159 /*set to TRUE when registry needn't to be updated */
160 static gboolean _gst_disable_registry_update = FALSE;
162 static void load_plugin_func (gpointer data, gpointer user_data);
163 static gboolean init_pre (GOptionContext * context, GOptionGroup * group,
164 gpointer data, GError ** error);
165 static gboolean init_post (GOptionContext * context, GOptionGroup * group,
166 gpointer data, GError ** error);
167 #ifndef GST_DISABLE_OPTION_PARSING
168 static gboolean parse_goption_arg (const gchar * s_opt,
169 const gchar * arg, gpointer data, GError ** err);
172 static GSList *preload_plugins = NULL;
174 const gchar g_log_domain_gstreamer[] = "GStreamer";
177 debug_log_handler (const gchar * log_domain,
178 GLogLevelFlags log_level, const gchar * message, gpointer user_data)
180 g_log_default_handler (log_domain, log_level, message, user_data);
181 /* FIXME: do we still need this ? fatal errors these days are all
182 * other than core errors */
183 /* g_on_error_query (NULL); */
190 #ifndef GST_DISABLE_GST_DEBUG
201 ARG_REGISTRY_UPDATE_DISABLE,
202 ARG_REGISTRY_FORK_DISABLE
205 /* debug-spec ::= category-spec [, category-spec]*
206 * category-spec ::= category:val | val
215 #ifndef GST_DISABLE_GST_DEBUG
217 parse_debug_category (gchar * str, const gchar ** category)
234 parse_debug_level (gchar * str, gint * level)
242 if (str[0] != NUL && str[1] == NUL
243 && str[0] >= '0' && str[0] < '0' + GST_LEVEL_COUNT) {
244 *level = str[0] - '0';
252 parse_debug_list (const gchar * list)
257 g_return_if_fail (list != NULL);
259 split = g_strsplit (list, ",", 0);
261 for (walk = split; *walk; walk++) {
262 if (strchr (*walk, ':')) {
263 gchar **values = g_strsplit (*walk, ":", 2);
265 if (values[0] && values[1]) {
267 const gchar *category;
269 if (parse_debug_category (values[0], &category)
270 && parse_debug_level (values[1], &level))
271 gst_debug_set_threshold_for_name (category, level);
278 if (parse_debug_level (*walk, &level))
279 gst_debug_set_default_threshold (level);
288 * gst_init_get_option_group:
290 * Returns a #GOptionGroup with GStreamer's argument specifications. The
291 * group is set up to use standard GOption callbacks, so when using this
292 * group in combination with GOption parsing methods, all argument parsing
293 * and initialization is automated.
295 * This function is useful if you want to integrate GStreamer with other
296 * libraries that use GOption (see g_option_context_add_group() ).
298 * If you use this function, you should make sure you initialise the GLib
299 * threading system as one of the very first things in your program
300 * (see the example at the beginning of this section).
302 * Returns: a pointer to GStreamer's option group.
306 gst_init_get_option_group (void)
308 #ifndef GST_DISABLE_OPTION_PARSING
310 static const GOptionEntry gst_args[] = {
311 {"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
312 (gpointer) parse_goption_arg, N_("Print the GStreamer version"), NULL},
313 {"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
314 (gpointer) parse_goption_arg, N_("Make all warnings fatal"), NULL},
315 #ifndef GST_DISABLE_GST_DEBUG
316 {"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
317 (gpointer) parse_goption_arg,
318 N_("Print available debug categories and exit"),
320 {"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK,
321 (gpointer) parse_goption_arg,
322 N_("Default debug level from 1 (only error) to 5 (anything) or "
325 {"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) parse_goption_arg,
326 N_("Comma-separated list of category_name:level pairs to set "
327 "specific levels for the individual categories. Example: "
328 "GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
330 {"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
331 (gpointer) parse_goption_arg, N_("Disable colored debugging output"),
333 {"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
334 (gpointer) parse_goption_arg, N_("Disable debugging"), NULL},
336 {"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
337 (gpointer) parse_goption_arg,
338 N_("Enable verbose plugin loading diagnostics"),
340 {"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK,
341 (gpointer) parse_goption_arg,
342 N_("Colon-separated paths containing plugins"), N_("PATHS")},
343 {"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK,
344 (gpointer) parse_goption_arg,
345 N_("Comma-separated list of plugins to preload in addition to the "
346 "list stored in environment variable GST_PLUGIN_PATH"),
348 {"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
349 (gpointer) parse_goption_arg,
350 N_("Disable trapping of segmentation faults during plugin loading"),
352 {"gst-disable-registry-update", 0, G_OPTION_FLAG_NO_ARG,
353 G_OPTION_ARG_CALLBACK,
354 (gpointer) parse_goption_arg,
355 N_("Disable updating the registry"),
357 {"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
358 G_OPTION_ARG_CALLBACK,
359 (gpointer) parse_goption_arg,
360 N_("Disable the use of fork() while scanning the registry"),
365 /* The GLib threading system must be initialised before calling any other
366 * GLib function according to the documentation; if the application hasn't
367 * called gst_init() yet or initialised the threading system otherwise, we
368 * better issue a warning here (since chances are high that the application
369 * has already called other GLib functions such as g_option_context_new() */
370 if (!g_thread_supported ()) {
371 g_warning ("The GStreamer function gst_init_get_option_group() was\n"
372 "\tcalled, but the GLib threading system has not been initialised\n"
373 "\tyet, something that must happen before any other GLib function\n"
374 "\tis called. The application needs to be fixed so that it calls\n"
375 "\t if (!g_thread_supported ()) g_thread_init(NULL);\n"
376 "\tas very first thing in its main() function. Please file a bug\n"
377 "\tagainst this application.");
378 g_thread_init (NULL);
381 group = g_option_group_new ("gst", _("GStreamer Options"),
382 _("Show GStreamer Options"), NULL, NULL);
383 g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
384 (GOptionParseFunc) init_post);
386 g_option_group_add_entries (group, gst_args);
387 g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
397 * @argc: pointer to application's argc
398 * @argv: pointer to application's argv
399 * @err: pointer to a #GError to which a message will be posted on error
401 * Initializes the GStreamer library, setting up internal path lists,
402 * registering built-in elements, and loading standard plugins.
404 * This function will return %FALSE if GStreamer could not be initialized
405 * for some reason. If you want your program to fail fatally,
406 * use gst_init() instead.
408 * This function should be called before calling any other GLib functions. If
409 * this is not an option, your program must initialise the GLib thread system
410 * using g_thread_init() before any other GLib functions are called.
412 * Returns: %TRUE if GStreamer could be initialized.
415 gst_init_check (int *argc, char **argv[], GError ** err)
417 #ifndef GST_DISABLE_OPTION_PARSING
423 if (!g_thread_supported ())
424 g_thread_init (NULL);
426 if (gst_initialized) {
427 GST_DEBUG ("already initialized gst");
430 #ifndef GST_DISABLE_OPTION_PARSING
431 ctx = g_option_context_new ("- GStreamer initialization");
432 g_option_context_set_ignore_unknown_options (ctx, TRUE);
433 group = gst_init_get_option_group ();
434 g_option_context_add_group (ctx, group);
435 res = g_option_context_parse (ctx, argc, argv, err);
436 g_option_context_free (ctx);
438 init_pre (NULL, NULL, NULL, NULL);
439 init_post (NULL, NULL, NULL, NULL);
443 gst_initialized = res;
446 GST_INFO ("initialized GStreamer successfully");
448 GST_INFO ("failed to initialize GStreamer");
456 * @argc: pointer to application's argc
457 * @argv: pointer to application's argv
459 * Initializes the GStreamer library, setting up internal path lists,
460 * registering built-in elements, and loading standard plugins.
462 * This function should be called before calling any other GLib functions. If
463 * this is not an option, your program must initialise the GLib thread system
464 * using g_thread_init() before any other GLib functions are called.
467 * This function will terminate your program if it was unable to initialize
468 * GStreamer for some reason. If you want your program to fall back,
469 * use gst_init_check() instead.
472 * WARNING: This function does not work in the same way as corresponding
473 * functions in other glib-style libraries, such as gtk_init(). In
474 * particular, unknown command line options cause this function to
475 * abort program execution.
478 gst_init (int *argc, char **argv[])
482 if (!gst_init_check (argc, argv, &err)) {
483 g_print ("Could not initialize GStreamer: %s\n",
484 err ? err->message : "unknown error occurred");
492 #ifndef GST_DISABLE_REGISTRY
494 add_path_func (gpointer data, gpointer user_data)
496 GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
497 plugin_paths = g_list_append (plugin_paths, g_strdup (data));
501 #ifndef GST_DISABLE_OPTION_PARSING
503 prepare_for_load_plugin_func (gpointer data, gpointer user_data)
505 preload_plugins = g_slist_prepend (preload_plugins, g_strdup (data));
510 load_plugin_func (gpointer data, gpointer user_data)
513 const gchar *filename;
516 filename = (const gchar *) data;
518 plugin = gst_plugin_load_file (filename, &err);
521 GST_INFO ("Loaded plugin: \"%s\"", filename);
523 gst_default_registry_add_plugin (plugin);
526 /* Report error to user, and free error */
527 GST_ERROR ("Failed to load plugin: %s", err->message);
530 GST_WARNING ("Failed to load plugin: \"%s\"", filename);
535 #ifndef GST_DISABLE_OPTION_PARSING
537 split_and_iterate (const gchar * stringlist, gchar * separator, GFunc iterator,
542 gchar *lastlist = g_strdup (stringlist);
545 strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
550 iterator (strings[j], user_data);
551 if (++j == MAX_PATH_SPLIT) {
552 lastlist = g_strdup (strings[j]);
557 g_strfreev (strings);
562 /* we have no fail cases yet, but maybe in the future */
564 init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
567 if (gst_initialized) {
568 GST_DEBUG ("already initialized");
572 /* GStreamer was built against a GLib >= 2.8 and is therefore not doing
573 * the refcount hack. Check that it isn't being run against an older GLib */
574 if (glib_major_version < 2 ||
575 (glib_major_version == 2 && glib_minor_version < 8)) {
576 g_warning ("GStreamer was compiled against GLib %d.%d.%d but is running"
577 " against %d.%d.%d. This will cause reference counting issues",
578 GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION,
579 glib_major_version, glib_minor_version, glib_micro_version);
584 /* we need threading to be enabled right here */
585 g_assert (g_thread_supported ());
589 setlocale (LC_ALL, "");
590 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
591 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
592 #endif /* ENABLE_NLS */
594 #ifndef GST_DISABLE_GST_DEBUG
596 const gchar *debug_list;
598 if (g_getenv ("GST_DEBUG_NO_COLOR") != NULL)
599 gst_debug_set_colored (FALSE);
601 debug_list = g_getenv ("GST_DEBUG");
603 parse_debug_list (debug_list);
607 priv_gst_dump_dot_dir = g_getenv ("GST_DEBUG_DUMP_DOT_DIR");
609 /* This is the earliest we can make stuff show up in the logs.
610 * So give some useful info about GStreamer here */
611 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
612 GST_INFO ("Using library installed in %s", LIBDIR);
614 /* Print some basic system details if possible (OS/architecture) */
615 #ifdef HAVE_SYS_UTSNAME_H
617 struct utsname sys_details;
619 if (uname (&sys_details) == 0) {
620 GST_INFO ("%s %s %s %s %s", sys_details.sysname,
621 sys_details.nodename, sys_details.release, sys_details.version,
622 sys_details.machine);
631 gst_register_core_elements (GstPlugin * plugin)
633 /* register some standard builtin types */
634 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
636 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
639 g_assert_not_reached ();
644 #ifndef GST_DISABLE_REGISTRY
648 REGISTRY_SCAN_AND_UPDATE_FAILURE = 0,
649 REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED,
650 REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED
651 } GstRegistryScanAndUpdateResult;
654 * scan_and_update_registry:
655 * @default_registry: the #GstRegistry
656 * @registry_file: registry filename
657 * @write_changes: write registry if it has changed?
659 * Scans for registry changes and eventually updates the registry cache.
661 * Return: %REGISTRY_SCAN_AND_UPDATE_FAILURE if the registry could not scanned
662 * or updated, %REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED if the
663 * registry is clean and %REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED if
664 * it has been updated and the cache needs to be re-read.
666 static GstRegistryScanAndUpdateResult
667 scan_and_update_registry (GstRegistry * default_registry,
668 const gchar * registry_file, gboolean write_changes, GError ** error)
670 const gchar *plugin_path;
671 gboolean changed = FALSE;
674 GST_INFO ("Validating registry cache: %s", registry_file);
675 /* It sounds tempting to just compare the mtime of directories with the mtime
676 * of the registry cache, but it does not work. It would not catch updated
677 * plugins, which might bring more or less features.
680 /* scan paths specified via --gst-plugin-path */
681 GST_DEBUG ("scanning paths added via --gst-plugin-path");
682 for (l = plugin_paths; l != NULL; l = l->next) {
683 GST_INFO ("Scanning plugin path: \"%s\"", (gchar *) l->data);
684 changed |= gst_registry_scan_path (default_registry, (gchar *) l->data);
686 /* keep plugin_paths around in case a re-scan is forced later on */
688 /* GST_PLUGIN_PATH specifies a list of directories to scan for
689 * additional plugins. These take precedence over the system plugins */
690 plugin_path = g_getenv ("GST_PLUGIN_PATH");
695 GST_DEBUG ("GST_PLUGIN_PATH set to %s", plugin_path);
696 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
697 for (i = 0; list[i]; i++) {
698 changed |= gst_registry_scan_path (default_registry, list[i]);
702 GST_DEBUG ("GST_PLUGIN_PATH not set");
705 /* GST_PLUGIN_SYSTEM_PATH specifies a list of plugins that are always
706 * loaded by default. If not set, this defaults to the system-installed
707 * path, and the plugins installed in the user's home directory */
708 plugin_path = g_getenv ("GST_PLUGIN_SYSTEM_PATH");
709 if (plugin_path == NULL) {
712 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH not set");
714 /* plugins in the user's home directory take precedence over
715 * system-installed ones */
716 home_plugins = g_build_filename (g_get_home_dir (),
717 ".gstreamer-" GST_MAJORMINOR, "plugins", NULL);
718 GST_DEBUG ("scanning home plugins %s", home_plugins);
719 changed |= gst_registry_scan_path (default_registry, home_plugins);
720 g_free (home_plugins);
722 /* add the main (installed) library path */
723 GST_DEBUG ("scanning main plugins %s", PLUGINDIR);
724 changed |= gst_registry_scan_path (default_registry, PLUGINDIR);
731 base_dir = g_win32_get_package_installation_directory (NULL,
732 "libgstreamer-0.10-0.dll");
734 dir = g_build_filename (base_dir, "lib", "gstreamer-0.10", NULL);
735 GST_DEBUG ("scanning DLL dir %s", dir);
737 changed |= gst_registry_scan_path (default_registry, dir);
747 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path);
748 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
749 for (i = 0; list[i]; i++) {
750 changed |= gst_registry_scan_path (default_registry, list[i]);
755 /* Remove cached plugins so stale info is cleared. */
756 changed |= _priv_gst_registry_remove_cache_plugins (default_registry);
759 GST_INFO ("Registry cache has not changed");
760 return REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED;
763 if (!write_changes) {
764 GST_INFO ("Registry cache changed, but writing is disabled. Not writing.");
765 return REGISTRY_SCAN_AND_UPDATE_FAILURE;
768 GST_INFO ("Registry cache changed. Writing new registry cache");
769 if (!gst_registry_binary_write_cache (default_registry, registry_file)) {
770 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
771 _("Error writing registry cache to %s: %s"),
772 registry_file, g_strerror (errno));
773 return REGISTRY_SCAN_AND_UPDATE_FAILURE;
776 GST_INFO ("Registry cache written successfully");
777 return REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED;
781 ensure_current_registry_nonforking (GstRegistry * default_registry,
782 const gchar * registry_file, GError ** error)
784 /* fork() not available */
785 GST_DEBUG ("Updating registry cache in-process");
786 scan_and_update_registry (default_registry, registry_file, TRUE, error);
790 /* when forking is not available this function always does nothing but return
793 ensure_current_registry_forking (GstRegistry * default_registry,
794 const gchar * registry_file, GError ** error)
801 /* We fork here, and let the child read and possibly rebuild the registry.
802 * After that, the parent will re-read the freshly generated registry. */
803 GST_DEBUG ("forking to update registry");
805 if (pipe (pfd) == -1) {
806 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
807 _("Error re-scanning registry %s: %s"),
808 ", could not create pipes. Error", g_strerror (errno));
814 GST_ERROR ("Failed to fork()");
815 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
816 _("Error re-scanning registry %s: %s"),
817 ", failed to fork. Error", g_strerror (errno));
824 /* this is the child. Close the read pipe */
825 (void) close (pfd[0]);
827 GST_DEBUG ("child reading registry cache");
829 scan_and_update_registry (default_registry, registry_file, TRUE, NULL);
831 /* need to use _exit, so that any exit handlers registered don't
832 * bring down the main program */
833 GST_DEBUG ("child exiting: %d", result_code);
835 /* make valgrind happy (yes, you can call it insane) */
836 g_free ((char *) registry_file);
838 /* write a result byte to the pipe */
840 ret = write (pfd[1], &result_code, sizeof (result_code));
841 } while (ret == -1 && errno == EINTR);
842 /* if ret == -1 now, we could not write to pipe, probably
843 * means parent has exited before us */
844 (void) close (pfd[1]);
850 /* parent. Close write pipe */
851 (void) close (pfd[1]);
853 /* Wait for result from the pipe */
854 GST_DEBUG ("Waiting for data from child");
856 ret = read (pfd[0], &result_code, sizeof (result_code));
857 } while (ret == -1 && errno == EINTR);
860 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
861 _("Error re-scanning registry %s: %s"),
862 ", read returned error", g_strerror (errno));
866 (void) close (pfd[0]);
868 /* Wait to ensure the child is reaped, but ignore the result */
869 GST_DEBUG ("parent waiting on child");
870 waitpid (pid, NULL, 0);
871 GST_DEBUG ("parent done waiting on child");
874 GST_ERROR ("child did not exit normally, terminated by signal");
875 g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
876 _("Error re-scanning registry %s"), ", child terminated by signal");
880 if (result_code == REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED) {
881 GST_DEBUG ("Child succeeded. Parent reading registry cache");
882 _priv_gst_registry_remove_cache_plugins (default_registry);
883 gst_registry_binary_read_cache (default_registry, registry_file);
884 } else if (result_code == REGISTRY_SCAN_AND_UPDATE_FAILURE) {
885 GST_DEBUG ("Child failed. Parent re-scanning registry, ignoring errors.");
886 scan_and_update_registry (default_registry, registry_file, FALSE, NULL);
889 #endif /* HAVE_FORK */
894 ensure_current_registry (GError ** error)
896 gchar *registry_file;
897 GstRegistry *default_registry;
903 default_registry = gst_registry_get_default ();
904 registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
905 if (registry_file == NULL) {
906 registry_file = g_build_filename (g_get_home_dir (),
907 ".gstreamer-" GST_MAJORMINOR, "registry." HOST_CPU ".bin", NULL);
910 GST_INFO ("reading registry cache: %s", registry_file);
911 have_cache = gst_registry_binary_read_cache (default_registry, registry_file);
914 do_update = !_gst_disable_registry_update;
916 const gchar *update_env;
918 if ((update_env = g_getenv ("GST_REGISTRY_UPDATE"))) {
919 /* do update for any value different from "no" */
920 do_update = (strcmp (update_env, "no") != 0);
928 /* first see if forking is enabled */
929 do_fork = _gst_enable_registry_fork;
931 const gchar *fork_env;
933 /* forking enabled, see if it is disabled with an env var */
934 if ((fork_env = g_getenv ("GST_REGISTRY_FORK"))) {
935 /* fork enabled for any value different from "no" */
936 do_fork = strcmp (fork_env, "no") != 0;
940 /* now check registry with or without forking */
942 GST_DEBUG ("forking for registry rebuild");
943 ret = ensure_current_registry_forking (default_registry, registry_file,
946 GST_DEBUG ("requested not to fork for registry rebuild");
947 ret = ensure_current_registry_nonforking (default_registry, registry_file,
952 g_free (registry_file);
953 GST_INFO ("registry reading and updating done, result = %d", ret);
957 #endif /* GST_DISABLE_REGISTRY */
961 * - initalization of threads if we use them
964 * - initializes gst_format
965 * - registers a bunch of types for gst_objects
967 * - we don't have cases yet where this fails, but in the future
968 * we might and then it's nice to be able to return that
971 init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
976 #ifndef GST_DISABLE_TRACE
978 #endif /* GST_DISABLE_TRACE */
980 if (gst_initialized) {
981 GST_DEBUG ("already initialized");
985 llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
986 g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
988 _priv_gst_quarks_initialize ();
989 _gst_format_initialize ();
990 _gst_query_initialize ();
991 g_type_class_ref (gst_object_get_type ());
992 g_type_class_ref (gst_pad_get_type ());
993 g_type_class_ref (gst_element_factory_get_type ());
994 g_type_class_ref (gst_element_get_type ());
995 g_type_class_ref (gst_type_find_factory_get_type ());
996 g_type_class_ref (gst_bin_get_type ());
997 g_type_class_ref (gst_bus_get_type ());
998 g_type_class_ref (gst_task_get_type ());
999 g_type_class_ref (gst_clock_get_type ());
1001 g_type_class_ref (gst_index_factory_get_type ());
1002 gst_uri_handler_get_type ();
1004 g_type_class_ref (gst_object_flags_get_type ());
1005 g_type_class_ref (gst_bin_flags_get_type ());
1006 g_type_class_ref (gst_buffer_flag_get_type ());
1007 g_type_class_ref (gst_buffer_copy_flags_get_type ());
1008 g_type_class_ref (gst_bus_flags_get_type ());
1009 g_type_class_ref (gst_bus_sync_reply_get_type ());
1010 g_type_class_ref (gst_caps_flags_get_type ());
1011 g_type_class_ref (gst_clock_return_get_type ());
1012 g_type_class_ref (gst_clock_entry_type_get_type ());
1013 g_type_class_ref (gst_clock_flags_get_type ());
1014 g_type_class_ref (gst_debug_graph_details_get_type ());
1015 g_type_class_ref (gst_state_get_type ());
1016 g_type_class_ref (gst_state_change_return_get_type ());
1017 g_type_class_ref (gst_state_change_get_type ());
1018 g_type_class_ref (gst_element_flags_get_type ());
1019 g_type_class_ref (gst_core_error_get_type ());
1020 g_type_class_ref (gst_library_error_get_type ());
1021 g_type_class_ref (gst_resource_error_get_type ());
1022 g_type_class_ref (gst_stream_error_get_type ());
1023 g_type_class_ref (gst_event_type_flags_get_type ());
1024 g_type_class_ref (gst_event_type_get_type ());
1025 g_type_class_ref (gst_seek_type_get_type ());
1026 g_type_class_ref (gst_seek_flags_get_type ());
1027 g_type_class_ref (gst_format_get_type ());
1028 g_type_class_ref (gst_index_certainty_get_type ());
1029 g_type_class_ref (gst_index_entry_type_get_type ());
1030 g_type_class_ref (gst_index_lookup_method_get_type ());
1031 g_type_class_ref (gst_assoc_flags_get_type ());
1032 g_type_class_ref (gst_index_resolver_method_get_type ());
1033 g_type_class_ref (gst_index_flags_get_type ());
1034 g_type_class_ref (gst_debug_level_get_type ());
1035 g_type_class_ref (gst_debug_color_flags_get_type ());
1036 g_type_class_ref (gst_iterator_result_get_type ());
1037 g_type_class_ref (gst_iterator_item_get_type ());
1038 g_type_class_ref (gst_message_type_get_type ());
1039 g_type_class_ref (gst_mini_object_flags_get_type ());
1040 g_type_class_ref (gst_pad_link_return_get_type ());
1041 g_type_class_ref (gst_flow_return_get_type ());
1042 g_type_class_ref (gst_activate_mode_get_type ());
1043 g_type_class_ref (gst_pad_direction_get_type ());
1044 g_type_class_ref (gst_pad_flags_get_type ());
1045 g_type_class_ref (gst_pad_presence_get_type ());
1046 g_type_class_ref (gst_pad_template_flags_get_type ());
1047 g_type_class_ref (gst_pipeline_flags_get_type ());
1048 g_type_class_ref (gst_plugin_error_get_type ());
1049 g_type_class_ref (gst_plugin_flags_get_type ());
1050 g_type_class_ref (gst_plugin_dependency_flags_get_type ());
1051 g_type_class_ref (gst_rank_get_type ());
1052 g_type_class_ref (gst_query_type_get_type ());
1053 g_type_class_ref (gst_buffering_mode_get_type ());
1054 g_type_class_ref (gst_tag_merge_mode_get_type ());
1055 g_type_class_ref (gst_tag_flag_get_type ());
1056 g_type_class_ref (gst_task_state_get_type ());
1057 g_type_class_ref (gst_alloc_trace_flags_get_type ());
1058 g_type_class_ref (gst_type_find_probability_get_type ());
1059 g_type_class_ref (gst_uri_type_get_type ());
1060 g_type_class_ref (gst_parse_error_get_type ());
1061 g_type_class_ref (gst_parse_flags_get_type ());
1062 g_type_class_ref (gst_search_mode_get_type ());
1064 gst_structure_get_type ();
1065 _gst_value_initialize ();
1066 g_type_class_ref (gst_param_spec_fraction_get_type ());
1067 gst_caps_get_type ();
1068 _gst_event_initialize ();
1069 _gst_buffer_initialize ();
1070 _gst_buffer_list_initialize ();
1071 _gst_message_initialize ();
1072 _gst_tag_initialize ();
1074 _gst_plugin_initialize ();
1076 gst_g_error_get_type ();
1078 /* register core plugins */
1079 gst_plugin_register_static (GST_VERSION_MAJOR, GST_VERSION_MINOR,
1080 "staticelements", "core elements linked into the GStreamer library",
1081 gst_register_core_elements, VERSION, GST_LICENSE, PACKAGE,
1082 GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
1085 * Any errors happening below this point are non-fatal, we therefore mark
1086 * gstreamer as being initialized, since it is the case from a plugin point of
1089 * If anything fails, it will be put back to FALSE in gst_init_check().
1090 * This allows some special plugins that would call gst_init() to not cause a
1091 * looping effect (i.e. initializing GStreamer twice).
1093 gst_initialized = TRUE;
1095 #ifndef GST_DISABLE_REGISTRY
1096 if (!ensure_current_registry (error))
1098 #endif /* GST_DISABLE_REGISTRY */
1100 /* if we need to preload plugins, do so now */
1101 g_slist_foreach (preload_plugins, load_plugin_func, NULL);
1102 /* keep preload_plugins around in case a re-scan is forced later on */
1104 #ifndef GST_DISABLE_TRACE
1106 if (_gst_trace_on) {
1107 gst_trace = gst_trace_new ("gst.trace", 1024);
1108 gst_trace_set_default (gst_trace);
1110 #endif /* GST_DISABLE_TRACE */
1115 #ifndef GST_DISABLE_GST_DEBUG
1117 select_all (GstPlugin * plugin, gpointer user_data)
1123 sort_by_category_name (gconstpointer a, gconstpointer b)
1125 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
1126 gst_debug_category_get_name ((GstDebugCategory *) b));
1130 gst_debug_help (void)
1132 GSList *list, *walk;
1135 /* Need to ensure the registry is loaded to get debug categories */
1136 if (!init_post (NULL, NULL, NULL, NULL))
1139 list2 = gst_registry_plugin_filter (gst_registry_get_default (),
1140 select_all, FALSE, NULL);
1142 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
1143 for (g = list2; g; g = g_list_next (g)) {
1144 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
1146 gst_plugin_load (plugin);
1148 g_list_free (list2);
1150 list = gst_debug_get_all_categories ();
1151 walk = list = g_slist_sort (list, sort_by_category_name);
1154 g_print ("name level description\n");
1155 g_print ("---------------------+--------+--------------------------------\n");
1158 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
1160 if (gst_debug_is_colored ()) {
1162 gint color = gst_debug_construct_win_color (cat->color);
1163 const gint clear = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
1165 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
1166 g_print ("%-20s", gst_debug_category_get_name (cat));
1167 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
1168 g_print (" %1d %s ", gst_debug_category_get_threshold (cat),
1169 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)));
1170 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
1171 g_print ("%s", gst_debug_category_get_description (cat));
1172 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
1174 #else /* G_OS_WIN32 */
1175 gchar *color = gst_debug_construct_term_color (cat->color);
1177 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
1179 gst_debug_category_get_name (cat),
1180 gst_debug_category_get_threshold (cat),
1181 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
1182 color, gst_debug_category_get_description (cat));
1184 #endif /* G_OS_WIN32 */
1186 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
1187 gst_debug_category_get_threshold (cat),
1188 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
1189 gst_debug_category_get_description (cat));
1191 walk = g_slist_next (walk);
1193 g_slist_free (list);
1198 #ifndef GST_DISABLE_OPTION_PARSING
1200 parse_one_option (gint opt, const gchar * arg, GError ** err)
1204 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
1206 case ARG_FATAL_WARNINGS:{
1207 GLogLevelFlags fatal_mask;
1209 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
1210 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
1211 g_log_set_always_fatal (fatal_mask);
1214 #ifndef GST_DISABLE_GST_DEBUG
1215 case ARG_DEBUG_LEVEL:{
1218 tmp = strtol (arg, NULL, 0);
1219 if (tmp >= 0 && tmp < GST_LEVEL_COUNT) {
1220 gst_debug_set_default_threshold (tmp);
1225 parse_debug_list (arg);
1227 case ARG_DEBUG_NO_COLOR:
1228 gst_debug_set_colored (FALSE);
1230 case ARG_DEBUG_DISABLE:
1231 gst_debug_set_active (FALSE);
1233 case ARG_DEBUG_HELP:
1237 case ARG_PLUGIN_SPEW:
1239 case ARG_PLUGIN_PATH:
1240 #ifndef GST_DISABLE_REGISTRY
1241 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
1242 #endif /* GST_DISABLE_REGISTRY */
1244 case ARG_PLUGIN_LOAD:
1245 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
1247 case ARG_SEGTRAP_DISABLE:
1248 _gst_disable_segtrap = TRUE;
1250 case ARG_REGISTRY_UPDATE_DISABLE:
1251 _gst_disable_registry_update = TRUE;
1253 case ARG_REGISTRY_FORK_DISABLE:
1254 _gst_enable_registry_fork = FALSE;
1257 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
1258 _("Unknown option"));
1266 parse_goption_arg (const gchar * opt,
1267 const gchar * arg, gpointer data, GError ** err)
1275 "--gst-version", ARG_VERSION}, {
1276 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
1277 #ifndef GST_DISABLE_GST_DEBUG
1279 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
1280 "--gst-debug", ARG_DEBUG}, {
1281 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
1282 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
1283 "--gst-debug-help", ARG_DEBUG_HELP},
1286 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
1287 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
1288 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
1289 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
1290 "--gst-disable-registry-update", ARG_REGISTRY_UPDATE_DISABLE}, {
1291 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
1296 for (n = 0; options[n].opt; n++) {
1297 if (!strcmp (opt, options[n].opt)) {
1298 val = options[n].val;
1303 return parse_one_option (val, arg, err);
1307 extern GstRegistry *_gst_registry_default;
1312 * Clean up any resources created by GStreamer in gst_init().
1314 * It is normally not needed to call this function in a normal application
1315 * as the resources will automatically be freed when the program terminates.
1316 * This function is therefore mostly used by testsuites and other memory
1319 * After this call GStreamer (including this method) should not be used anymore.
1326 GST_INFO ("deinitializing GStreamer");
1328 if (gst_deinitialized) {
1329 GST_DEBUG ("already deinitialized");
1333 g_slist_foreach (preload_plugins, (GFunc) g_free, NULL);
1334 g_slist_free (preload_plugins);
1335 preload_plugins = NULL;
1337 #ifndef GST_DISABLE_REGISTRY
1338 g_list_foreach (plugin_paths, (GFunc) g_free, NULL);
1339 g_list_free (plugin_paths);
1340 plugin_paths = NULL;
1343 clock = gst_system_clock_obtain ();
1344 gst_object_unref (clock);
1345 gst_object_unref (clock);
1347 _priv_gst_registry_cleanup ();
1349 g_type_class_unref (g_type_class_peek (gst_object_get_type ()));
1350 g_type_class_unref (g_type_class_peek (gst_pad_get_type ()));
1351 g_type_class_unref (g_type_class_peek (gst_element_factory_get_type ()));
1352 g_type_class_unref (g_type_class_peek (gst_element_get_type ()));
1353 g_type_class_unref (g_type_class_peek (gst_type_find_factory_get_type ()));
1354 g_type_class_unref (g_type_class_peek (gst_bin_get_type ()));
1355 g_type_class_unref (g_type_class_peek (gst_bus_get_type ()));
1356 g_type_class_unref (g_type_class_peek (gst_task_get_type ()));
1357 g_type_class_unref (g_type_class_peek (gst_index_factory_get_type ()));
1358 g_type_class_unref (g_type_class_peek (gst_object_flags_get_type ()));
1359 g_type_class_unref (g_type_class_peek (gst_bin_flags_get_type ()));
1360 g_type_class_unref (g_type_class_peek (gst_buffer_flag_get_type ()));
1361 g_type_class_unref (g_type_class_peek (gst_buffer_copy_flags_get_type ()));
1362 g_type_class_unref (g_type_class_peek (gst_bus_flags_get_type ()));
1363 g_type_class_unref (g_type_class_peek (gst_bus_sync_reply_get_type ()));
1364 g_type_class_unref (g_type_class_peek (gst_caps_flags_get_type ()));
1365 g_type_class_unref (g_type_class_peek (gst_clock_return_get_type ()));
1366 g_type_class_unref (g_type_class_peek (gst_clock_entry_type_get_type ()));
1367 g_type_class_unref (g_type_class_peek (gst_clock_flags_get_type ()));
1368 g_type_class_unref (g_type_class_peek (gst_debug_graph_details_get_type ()));
1369 g_type_class_unref (g_type_class_peek (gst_state_get_type ()));
1370 g_type_class_unref (g_type_class_peek (gst_state_change_return_get_type ()));
1371 g_type_class_unref (g_type_class_peek (gst_state_change_get_type ()));
1372 g_type_class_unref (g_type_class_peek (gst_element_flags_get_type ()));
1373 g_type_class_unref (g_type_class_peek (gst_core_error_get_type ()));
1374 g_type_class_unref (g_type_class_peek (gst_library_error_get_type ()));
1375 g_type_class_unref (g_type_class_peek (gst_resource_error_get_type ()));
1376 g_type_class_unref (g_type_class_peek (gst_stream_error_get_type ()));
1377 g_type_class_unref (g_type_class_peek (gst_event_type_flags_get_type ()));
1378 g_type_class_unref (g_type_class_peek (gst_event_type_get_type ()));
1379 g_type_class_unref (g_type_class_peek (gst_seek_type_get_type ()));
1380 g_type_class_unref (g_type_class_peek (gst_seek_flags_get_type ()));
1381 g_type_class_unref (g_type_class_peek (gst_format_get_type ()));
1382 g_type_class_unref (g_type_class_peek (gst_index_certainty_get_type ()));
1383 g_type_class_unref (g_type_class_peek (gst_index_entry_type_get_type ()));
1384 g_type_class_unref (g_type_class_peek (gst_index_lookup_method_get_type ()));
1385 g_type_class_unref (g_type_class_peek (gst_assoc_flags_get_type ()));
1386 g_type_class_unref (g_type_class_peek (gst_index_resolver_method_get_type
1388 g_type_class_unref (g_type_class_peek (gst_index_flags_get_type ()));
1389 g_type_class_unref (g_type_class_peek (gst_debug_level_get_type ()));
1390 g_type_class_unref (g_type_class_peek (gst_debug_color_flags_get_type ()));
1391 g_type_class_unref (g_type_class_peek (gst_iterator_result_get_type ()));
1392 g_type_class_unref (g_type_class_peek (gst_iterator_item_get_type ()));
1393 g_type_class_unref (g_type_class_peek (gst_message_type_get_type ()));
1394 g_type_class_unref (g_type_class_peek (gst_mini_object_flags_get_type ()));
1395 g_type_class_unref (g_type_class_peek (gst_pad_link_return_get_type ()));
1396 g_type_class_unref (g_type_class_peek (gst_flow_return_get_type ()));
1397 g_type_class_unref (g_type_class_peek (gst_activate_mode_get_type ()));
1398 g_type_class_unref (g_type_class_peek (gst_pad_direction_get_type ()));
1399 g_type_class_unref (g_type_class_peek (gst_pad_flags_get_type ()));
1400 g_type_class_unref (g_type_class_peek (gst_pad_presence_get_type ()));
1401 g_type_class_unref (g_type_class_peek (gst_pad_template_flags_get_type ()));
1402 g_type_class_unref (g_type_class_peek (gst_pipeline_flags_get_type ()));
1403 g_type_class_unref (g_type_class_peek (gst_plugin_error_get_type ()));
1404 g_type_class_unref (g_type_class_peek (gst_plugin_flags_get_type ()));
1405 g_type_class_unref (g_type_class_peek (gst_rank_get_type ()));
1406 g_type_class_unref (g_type_class_peek (gst_query_type_get_type ()));
1407 g_type_class_unref (g_type_class_peek (gst_buffering_mode_get_type ()));
1408 g_type_class_unref (g_type_class_peek (gst_tag_merge_mode_get_type ()));
1409 g_type_class_unref (g_type_class_peek (gst_tag_flag_get_type ()));
1410 g_type_class_unref (g_type_class_peek (gst_task_state_get_type ()));
1411 g_type_class_unref (g_type_class_peek (gst_alloc_trace_flags_get_type ()));
1412 g_type_class_unref (g_type_class_peek (gst_type_find_probability_get_type
1414 g_type_class_unref (g_type_class_peek (gst_uri_type_get_type ()));
1415 g_type_class_unref (g_type_class_peek (gst_parse_error_get_type ()));
1416 g_type_class_unref (g_type_class_peek (gst_param_spec_fraction_get_type ()));
1418 gst_deinitialized = TRUE;
1419 GST_INFO ("deinitialized GStreamer");
1424 * @major: pointer to a guint to store the major version number
1425 * @minor: pointer to a guint to store the minor version number
1426 * @micro: pointer to a guint to store the micro version number
1427 * @nano: pointer to a guint to store the nano version number
1429 * Gets the version number of the GStreamer library.
1432 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1434 g_return_if_fail (major);
1435 g_return_if_fail (minor);
1436 g_return_if_fail (micro);
1437 g_return_if_fail (nano);
1439 *major = GST_VERSION_MAJOR;
1440 *minor = GST_VERSION_MINOR;
1441 *micro = GST_VERSION_MICRO;
1442 *nano = GST_VERSION_NANO;
1446 * gst_version_string:
1448 * This function returns a string that is useful for describing this version
1449 * of GStreamer to the outside world: user agent strings, logging, ...
1451 * Returns: a newly allocated string describing this version of GStreamer.
1455 gst_version_string ()
1457 guint major, minor, micro, nano;
1459 gst_version (&major, &minor, µ, &nano);
1461 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1463 return g_strdup_printf ("GStreamer %d.%d.%d (GIT)", major, minor, micro);
1465 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1470 * gst_segtrap_is_enabled:
1472 * Some functions in the GStreamer core might install a custom SIGSEGV handler
1473 * to better catch and report errors to the application. Currently this feature
1474 * is enabled by default when loading plugins.
1476 * Applications might want to disable this behaviour with the
1477 * gst_segtrap_set_enabled() function. This is typically done if the application
1478 * wants to install its own handler without GStreamer interfering.
1480 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1485 gst_segtrap_is_enabled (void)
1487 /* yeps, it's enabled when it's not disabled */
1488 return !_gst_disable_segtrap;
1492 * gst_segtrap_set_enabled:
1493 * @enabled: whether a custom SIGSEGV handler should be installed.
1495 * Applications might want to disable/enable the SIGSEGV handling of
1496 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1501 gst_segtrap_set_enabled (gboolean enabled)
1503 _gst_disable_segtrap = !enabled;
1507 * gst_registry_fork_is_enabled:
1509 * By default GStreamer will perform a fork() when scanning and rebuilding the
1512 * Applications might want to disable this behaviour with the
1513 * gst_registry_fork_set_enabled() function.
1515 * Returns: %TRUE if GStreamer will use fork() when rebuilding the registry. On
1516 * platforms without fork(), this function will always return %FALSE.
1521 gst_registry_fork_is_enabled (void)
1523 return _gst_enable_registry_fork;
1527 * gst_registry_fork_set_enabled:
1528 * @enabled: whether rebuilding the registry may fork
1530 * Applications might want to disable/enable the usage of fork() when rebuilding
1531 * the registry. See gst_registry_fork_is_enabled() for more information.
1533 * On platforms without fork(), this function will have no effect on the return
1534 * value of gst_registry_fork_is_enabled().
1539 gst_registry_fork_set_enabled (gboolean enabled)
1542 _gst_enable_registry_fork = enabled;
1543 #endif /* HAVE_FORK */
1548 * gst_update_registry:
1550 * Forces GStreamer to re-scan its plugin paths and update the default
1553 * Applications will almost never need to call this function, it is only
1554 * useful if the application knows new plugins have been installed (or old
1555 * ones removed) since the start of the application (or, to be precise, the
1556 * first call to gst_init()) and the application wants to make use of any
1557 * newly-installed plugins without restarting the application.
1559 * Applications should assume that the registry update is neither atomic nor
1560 * thread-safe and should therefore not have any dynamic pipelines running
1561 * (including the playbin and decodebin elements) and should also not create
1562 * any elements or access the GStreamer registry while the update is in
1565 * Note that this function may block for a significant amount of time.
1567 * Returns: %TRUE if the registry has been updated successfully (does not
1568 * imply that there were changes), otherwise %FALSE.
1573 gst_update_registry (void)
1575 gboolean res = FALSE;
1577 #ifndef GST_DISABLE_REGISTRY
1580 res = ensure_current_registry (&err);
1582 GST_WARNING ("registry update failed: %s", err->message);
1585 GST_LOG ("registry update succeeded");
1588 if (preload_plugins) {
1589 g_slist_foreach (preload_plugins, load_plugin_func, NULL);
1592 GST_WARNING ("registry update failed: %s", "registry disabled");
1593 #endif /* GST_DISABLE_REGISTRY */