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 #include "gst-i18n-lib.h"
122 #include <locale.h> /* for LC_ALL */
126 #define GST_CAT_DEFAULT GST_CAT_GST_INIT
128 #define MAX_PATH_SPLIT 16
129 #define GST_PLUGIN_SEPARATOR ","
131 static gboolean gst_initialized = FALSE;
132 static gboolean gst_deinitialized = FALSE;
134 #ifndef GST_DISABLE_REGISTRY
135 static GList *plugin_paths = NULL; /* for delayed processing in post_init */
138 #ifndef GST_DISABLE_GST_DEBUG
139 extern const gchar *priv_gst_dump_dot_dir;
143 #if defined(HAVE_FORK) && !defined(GST_HAVE_UNSAFE_FORK)
144 #define DEFAULT_FORK TRUE
146 #define DEFAULT_FORK FALSE
147 #endif /* HAVE_FORK */
149 /* set to TRUE when segfaults need to be left as is */
150 static gboolean _gst_disable_segtrap = FALSE;
152 /* control the behaviour of registry rebuild */
153 static gboolean _gst_enable_registry_fork = DEFAULT_FORK;
155 /*set to TRUE when registry needn't to be updated */
156 static gboolean _gst_disable_registry_update = FALSE;
158 static void load_plugin_func (gpointer data, gpointer user_data);
159 static gboolean init_pre (GOptionContext * context, GOptionGroup * group,
160 gpointer data, GError ** error);
161 static gboolean init_post (GOptionContext * context, GOptionGroup * group,
162 gpointer data, GError ** error);
163 #ifndef GST_DISABLE_OPTION_PARSING
164 static gboolean parse_goption_arg (const gchar * s_opt,
165 const gchar * arg, gpointer data, GError ** err);
168 static GSList *preload_plugins = NULL;
170 const gchar g_log_domain_gstreamer[] = "GStreamer";
173 debug_log_handler (const gchar * log_domain,
174 GLogLevelFlags log_level, const gchar * message, gpointer user_data)
176 g_log_default_handler (log_domain, log_level, message, user_data);
177 /* FIXME: do we still need this ? fatal errors these days are all
178 * other than core errors */
179 /* g_on_error_query (NULL); */
186 #ifndef GST_DISABLE_GST_DEBUG
197 ARG_REGISTRY_UPDATE_DISABLE,
198 ARG_REGISTRY_FORK_DISABLE
201 /* debug-spec ::= category-spec [, category-spec]*
202 * category-spec ::= category:val | val
211 #ifndef GST_DISABLE_GST_DEBUG
213 parse_debug_category (gchar * str, const gchar ** category)
230 parse_debug_level (gchar * str, gint * level)
238 if (str[0] != NUL && str[1] == NUL
239 && str[0] >= '0' && str[0] < '0' + GST_LEVEL_COUNT) {
240 *level = str[0] - '0';
248 parse_debug_list (const gchar * list)
253 g_return_if_fail (list != NULL);
255 split = g_strsplit (list, ",", 0);
257 for (walk = split; *walk; walk++) {
258 if (strchr (*walk, ':')) {
259 gchar **values = g_strsplit (*walk, ":", 2);
261 if (values[0] && values[1]) {
263 const gchar *category;
265 if (parse_debug_category (values[0], &category)
266 && parse_debug_level (values[1], &level))
267 gst_debug_set_threshold_for_name (category, level);
274 if (parse_debug_level (*walk, &level))
275 gst_debug_set_default_threshold (level);
284 * gst_init_get_option_group:
286 * Returns a #GOptionGroup with GStreamer's argument specifications. The
287 * group is set up to use standard GOption callbacks, so when using this
288 * group in combination with GOption parsing methods, all argument parsing
289 * and initialization is automated.
291 * This function is useful if you want to integrate GStreamer with other
292 * libraries that use GOption (see g_option_context_add_group() ).
294 * If you use this function, you should make sure you initialise the GLib
295 * threading system as one of the very first things in your program
296 * (see the example at the beginning of this section).
298 * Returns: a pointer to GStreamer's option group.
302 gst_init_get_option_group (void)
304 #ifndef GST_DISABLE_OPTION_PARSING
306 static const GOptionEntry gst_args[] = {
307 {"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
308 (gpointer) parse_goption_arg, N_("Print the GStreamer version"), NULL},
309 {"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
310 (gpointer) parse_goption_arg, N_("Make all warnings fatal"), NULL},
311 #ifndef GST_DISABLE_GST_DEBUG
312 {"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
313 (gpointer) parse_goption_arg,
314 N_("Print available debug categories and exit"),
316 {"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK,
317 (gpointer) parse_goption_arg,
318 N_("Default debug level from 1 (only error) to 5 (anything) or "
321 {"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) parse_goption_arg,
322 N_("Comma-separated list of category_name:level pairs to set "
323 "specific levels for the individual categories. Example: "
324 "GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
326 {"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
327 (gpointer) parse_goption_arg, N_("Disable colored debugging output"),
329 {"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
330 (gpointer) parse_goption_arg, N_("Disable debugging"), NULL},
332 {"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
333 (gpointer) parse_goption_arg,
334 N_("Enable verbose plugin loading diagnostics"),
336 {"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK,
337 (gpointer) parse_goption_arg,
338 N_("Colon-separated paths containing plugins"), N_("PATHS")},
339 {"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK,
340 (gpointer) parse_goption_arg,
341 N_("Comma-separated list of plugins to preload in addition to the "
342 "list stored in environment variable GST_PLUGIN_PATH"),
344 {"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
345 (gpointer) parse_goption_arg,
346 N_("Disable trapping of segmentation faults during plugin loading"),
348 {"gst-disable-registry-update", 0, G_OPTION_FLAG_NO_ARG,
349 G_OPTION_ARG_CALLBACK,
350 (gpointer) parse_goption_arg,
351 N_("Disable updating the registry"),
353 {"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
354 G_OPTION_ARG_CALLBACK,
355 (gpointer) parse_goption_arg,
356 N_("Disable the use of fork() while scanning the registry"),
361 /* The GLib threading system must be initialised before calling any other
362 * GLib function according to the documentation; if the application hasn't
363 * called gst_init() yet or initialised the threading system otherwise, we
364 * better issue a warning here (since chances are high that the application
365 * has already called other GLib functions such as g_option_context_new() */
366 if (!g_thread_supported ()) {
367 g_warning ("The GStreamer function gst_init_get_option_group() was\n"
368 "\tcalled, but the GLib threading system has not been initialised\n"
369 "\tyet, something that must happen before any other GLib function\n"
370 "\tis called. The application needs to be fixed so that it calls\n"
371 "\t if (!g_thread_supported ()) g_thread_init(NULL);\n"
372 "\tas very first thing in its main() function. Please file a bug\n"
373 "\tagainst this application.");
374 g_thread_init (NULL);
377 group = g_option_group_new ("gst", _("GStreamer Options"),
378 _("Show GStreamer Options"), NULL, NULL);
379 g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
380 (GOptionParseFunc) init_post);
382 g_option_group_add_entries (group, gst_args);
383 g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
393 * @argc: pointer to application's argc
394 * @argv: pointer to application's argv
395 * @err: pointer to a #GError to which a message will be posted on error
397 * Initializes the GStreamer library, setting up internal path lists,
398 * registering built-in elements, and loading standard plugins.
400 * This function will return %FALSE if GStreamer could not be initialized
401 * for some reason. If you want your program to fail fatally,
402 * use gst_init() instead.
404 * This function should be called before calling any other GLib functions. If
405 * this is not an option, your program must initialise the GLib thread system
406 * using g_thread_init() before any other GLib functions are called.
408 * Returns: %TRUE if GStreamer could be initialized.
411 gst_init_check (int *argc, char **argv[], GError ** err)
413 #ifndef GST_DISABLE_OPTION_PARSING
419 if (!g_thread_supported ())
420 g_thread_init (NULL);
422 if (gst_initialized) {
423 GST_DEBUG ("already initialized gst");
426 #ifndef GST_DISABLE_OPTION_PARSING
427 ctx = g_option_context_new ("- GStreamer initialization");
428 g_option_context_set_ignore_unknown_options (ctx, TRUE);
429 group = gst_init_get_option_group ();
430 g_option_context_add_group (ctx, group);
431 res = g_option_context_parse (ctx, argc, argv, err);
432 g_option_context_free (ctx);
434 init_pre (NULL, NULL, NULL, NULL);
435 init_post (NULL, NULL, NULL, NULL);
439 gst_initialized = res;
442 GST_INFO ("initialized GStreamer successfully");
444 GST_INFO ("failed to initialize GStreamer");
452 * @argc: pointer to application's argc
453 * @argv: pointer to application's argv
455 * Initializes the GStreamer library, setting up internal path lists,
456 * registering built-in elements, and loading standard plugins.
458 * This function should be called before calling any other GLib functions. If
459 * this is not an option, your program must initialise the GLib thread system
460 * using g_thread_init() before any other GLib functions are called.
463 * This function will terminate your program if it was unable to initialize
464 * GStreamer for some reason. If you want your program to fall back,
465 * use gst_init_check() instead.
468 * WARNING: This function does not work in the same way as corresponding
469 * functions in other glib-style libraries, such as gtk_init(). In
470 * particular, unknown command line options cause this function to
471 * abort program execution.
474 gst_init (int *argc, char **argv[])
478 if (!gst_init_check (argc, argv, &err)) {
479 g_print ("Could not initialize GStreamer: %s\n",
480 err ? err->message : "unknown error occurred");
488 #ifndef GST_DISABLE_REGISTRY
490 add_path_func (gpointer data, gpointer user_data)
492 GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
493 plugin_paths = g_list_append (plugin_paths, g_strdup (data));
497 #ifndef GST_DISABLE_OPTION_PARSING
499 prepare_for_load_plugin_func (gpointer data, gpointer user_data)
501 preload_plugins = g_slist_prepend (preload_plugins, g_strdup (data));
506 load_plugin_func (gpointer data, gpointer user_data)
509 const gchar *filename;
512 filename = (const gchar *) data;
514 plugin = gst_plugin_load_file (filename, &err);
517 GST_INFO ("Loaded plugin: \"%s\"", filename);
519 gst_default_registry_add_plugin (plugin);
522 /* Report error to user, and free error */
523 GST_ERROR ("Failed to load plugin: %s", err->message);
526 GST_WARNING ("Failed to load plugin: \"%s\"", filename);
531 #ifndef GST_DISABLE_OPTION_PARSING
533 split_and_iterate (const gchar * stringlist, gchar * separator, GFunc iterator,
538 gchar *lastlist = g_strdup (stringlist);
541 strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
546 iterator (strings[j], user_data);
547 if (++j == MAX_PATH_SPLIT) {
548 lastlist = g_strdup (strings[j]);
553 g_strfreev (strings);
558 /* we have no fail cases yet, but maybe in the future */
560 init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
563 if (gst_initialized) {
564 GST_DEBUG ("already initialized");
568 /* GStreamer was built against a GLib >= 2.8 and is therefore not doing
569 * the refcount hack. Check that it isn't being run against an older GLib */
570 if (glib_major_version < 2 ||
571 (glib_major_version == 2 && glib_minor_version < 8)) {
572 g_warning ("GStreamer was compiled against GLib %d.%d.%d but is running"
573 " against %d.%d.%d. This will cause reference counting issues",
574 GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION,
575 glib_major_version, glib_minor_version, glib_micro_version);
580 /* we need threading to be enabled right here */
581 g_assert (g_thread_supported ());
585 setlocale (LC_ALL, "");
586 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
587 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
588 #endif /* ENABLE_NLS */
590 #ifndef GST_DISABLE_GST_DEBUG
592 const gchar *debug_list;
594 if (g_getenv ("GST_DEBUG_NO_COLOR") != NULL)
595 gst_debug_set_colored (FALSE);
597 debug_list = g_getenv ("GST_DEBUG");
599 parse_debug_list (debug_list);
603 priv_gst_dump_dot_dir = g_getenv ("GST_DEBUG_DUMP_DOT_DIR");
605 /* This is the earliest we can make stuff show up in the logs.
606 * So give some useful info about GStreamer here */
607 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
608 GST_INFO ("Using library installed in %s", LIBDIR);
610 /* Print some basic system details if possible (OS/architecture) */
611 #ifdef HAVE_SYS_UTSNAME_H
613 struct utsname sys_details;
615 if (uname (&sys_details) == 0) {
616 GST_INFO ("%s %s %s %s %s", sys_details.sysname,
617 sys_details.nodename, sys_details.release, sys_details.version,
618 sys_details.machine);
627 gst_register_core_elements (GstPlugin * plugin)
629 /* register some standard builtin types */
630 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
632 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
635 g_assert_not_reached ();
640 #ifndef GST_DISABLE_REGISTRY
644 REGISTRY_SCAN_AND_UPDATE_FAILURE = 0,
645 REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED,
646 REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED
647 } GstRegistryScanAndUpdateResult;
650 * scan_and_update_registry:
651 * @default_registry: the #GstRegistry
652 * @registry_file: registry filename
653 * @write_changes: write registry if it has changed?
655 * Scans for registry changes and eventually updates the registry cache.
657 * Return: %REGISTRY_SCAN_AND_UPDATE_FAILURE if the registry could not scanned
658 * or updated, %REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED if the
659 * registry is clean and %REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED if
660 * it has been updated and the cache needs to be re-read.
662 static GstRegistryScanAndUpdateResult
663 scan_and_update_registry (GstRegistry * default_registry,
664 const gchar * registry_file, gboolean write_changes, GError ** error)
666 const gchar *plugin_path;
667 gboolean changed = FALSE;
670 GST_INFO ("Validating registry cache: %s", registry_file);
671 /* It sounds tempting to just compare the mtime of directories with the mtime
672 * of the registry cache, but it does not work. It would not catch updated
673 * plugins, which might bring more or less features.
676 /* scan paths specified via --gst-plugin-path */
677 GST_DEBUG ("scanning paths added via --gst-plugin-path");
678 for (l = plugin_paths; l != NULL; l = l->next) {
679 GST_INFO ("Scanning plugin path: \"%s\"", (gchar *) l->data);
680 changed |= gst_registry_scan_path (default_registry, (gchar *) l->data);
682 /* keep plugin_paths around in case a re-scan is forced later on */
684 /* GST_PLUGIN_PATH specifies a list of directories to scan for
685 * additional plugins. These take precedence over the system plugins */
686 plugin_path = g_getenv ("GST_PLUGIN_PATH");
691 GST_DEBUG ("GST_PLUGIN_PATH set to %s", plugin_path);
692 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
693 for (i = 0; list[i]; i++) {
694 changed |= gst_registry_scan_path (default_registry, list[i]);
698 GST_DEBUG ("GST_PLUGIN_PATH not set");
701 /* GST_PLUGIN_SYSTEM_PATH specifies a list of plugins that are always
702 * loaded by default. If not set, this defaults to the system-installed
703 * path, and the plugins installed in the user's home directory */
704 plugin_path = g_getenv ("GST_PLUGIN_SYSTEM_PATH");
705 if (plugin_path == NULL) {
708 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH not set");
710 /* plugins in the user's home directory take precedence over
711 * system-installed ones */
712 home_plugins = g_build_filename (g_get_home_dir (),
713 ".gstreamer-" GST_MAJORMINOR, "plugins", NULL);
714 GST_DEBUG ("scanning home plugins %s", home_plugins);
715 changed |= gst_registry_scan_path (default_registry, home_plugins);
716 g_free (home_plugins);
718 /* add the main (installed) library path */
719 GST_DEBUG ("scanning main plugins %s", PLUGINDIR);
720 changed |= gst_registry_scan_path (default_registry, PLUGINDIR);
722 #ifdef G_PLATFORM_WIN32
727 base_dir = g_win32_get_package_installation_directory (NULL,
728 "libgstreamer-0.10-0.dll");
730 dir = g_build_filename (base_dir, "lib", "gstreamer-0.10", NULL);
731 GST_DEBUG ("scanning DLL dir %s", dir);
733 changed |= gst_registry_scan_path (default_registry, dir);
743 GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path);
744 list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
745 for (i = 0; list[i]; i++) {
746 changed |= gst_registry_scan_path (default_registry, list[i]);
751 /* Remove cached plugins so stale info is cleared. */
752 changed |= _priv_gst_registry_remove_cache_plugins (default_registry);
755 GST_INFO ("Registry cache has not changed");
756 return REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED;
759 if (!write_changes) {
760 GST_INFO ("Registry cache changed, but writing is disabled. Not writing.");
761 return REGISTRY_SCAN_AND_UPDATE_FAILURE;
764 GST_INFO ("Registry cache changed. Writing new registry cache");
765 #ifdef USE_BINARY_REGISTRY
766 if (!gst_registry_binary_write_cache (default_registry, registry_file)) {
768 if (!gst_registry_xml_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 #ifdef USE_BINARY_REGISTRY
884 gst_registry_binary_read_cache (default_registry, registry_file);
886 gst_registry_xml_read_cache (default_registry, registry_file);
888 } else if (result_code == REGISTRY_SCAN_AND_UPDATE_FAILURE) {
889 GST_DEBUG ("Child failed. Parent re-scanning registry, ignoring errors.");
890 scan_and_update_registry (default_registry, registry_file, FALSE, NULL);
893 #endif /* HAVE_FORK */
898 ensure_current_registry (GError ** error)
900 gchar *registry_file;
901 GstRegistry *default_registry;
907 default_registry = gst_registry_get_default ();
908 registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
909 if (registry_file == NULL) {
910 #ifdef USE_BINARY_REGISTRY
911 registry_file = g_build_filename (g_get_home_dir (),
912 ".gstreamer-" GST_MAJORMINOR, "registry." HOST_CPU ".bin", NULL);
914 registry_file = g_build_filename (g_get_home_dir (),
915 ".gstreamer-" GST_MAJORMINOR, "registry." HOST_CPU ".xml", NULL);
919 GST_INFO ("reading registry cache: %s", registry_file);
920 #ifdef USE_BINARY_REGISTRY
921 have_cache = gst_registry_binary_read_cache (default_registry, registry_file);
923 have_cache = gst_registry_xml_read_cache (default_registry, registry_file);
927 do_update = !_gst_disable_registry_update;
929 const gchar *update_env;
931 if ((update_env = g_getenv ("GST_REGISTRY_UPDATE"))) {
932 /* do update for any value different from "no" */
933 do_update = (strcmp (update_env, "no") != 0);
941 /* first see if forking is enabled */
942 do_fork = _gst_enable_registry_fork;
944 const gchar *fork_env;
946 /* forking enabled, see if it is disabled with an env var */
947 if ((fork_env = g_getenv ("GST_REGISTRY_FORK"))) {
948 /* fork enabled for any value different from "no" */
949 do_fork = strcmp (fork_env, "no") != 0;
953 /* now check registry with or without forking */
955 GST_DEBUG ("forking for registry rebuild");
956 ret = ensure_current_registry_forking (default_registry, registry_file,
959 GST_DEBUG ("requested not to fork for registry rebuild");
960 ret = ensure_current_registry_nonforking (default_registry, registry_file,
965 g_free (registry_file);
966 GST_INFO ("registry reading and updating done, result = %d", ret);
970 #endif /* GST_DISABLE_REGISTRY */
974 * - initalization of threads if we use them
977 * - initializes gst_format
978 * - registers a bunch of types for gst_objects
980 * - we don't have cases yet where this fails, but in the future
981 * we might and then it's nice to be able to return that
984 init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
989 #ifndef GST_DISABLE_TRACE
991 #endif /* GST_DISABLE_TRACE */
993 if (gst_initialized) {
994 GST_DEBUG ("already initialized");
998 llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
999 g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
1001 _priv_gst_quarks_initialize ();
1002 _gst_format_initialize ();
1003 _gst_query_initialize ();
1004 g_type_class_ref (gst_object_get_type ());
1005 g_type_class_ref (gst_pad_get_type ());
1006 g_type_class_ref (gst_element_factory_get_type ());
1007 g_type_class_ref (gst_element_get_type ());
1008 g_type_class_ref (gst_type_find_factory_get_type ());
1009 g_type_class_ref (gst_bin_get_type ());
1010 g_type_class_ref (gst_bus_get_type ());
1011 g_type_class_ref (gst_task_get_type ());
1012 g_type_class_ref (gst_clock_get_type ());
1014 g_type_class_ref (gst_index_factory_get_type ());
1015 gst_uri_handler_get_type ();
1017 g_type_class_ref (gst_object_flags_get_type ());
1018 g_type_class_ref (gst_bin_flags_get_type ());
1019 g_type_class_ref (gst_buffer_flag_get_type ());
1020 g_type_class_ref (gst_buffer_copy_flags_get_type ());
1021 g_type_class_ref (gst_bus_flags_get_type ());
1022 g_type_class_ref (gst_bus_sync_reply_get_type ());
1023 g_type_class_ref (gst_caps_flags_get_type ());
1024 g_type_class_ref (gst_clock_return_get_type ());
1025 g_type_class_ref (gst_clock_entry_type_get_type ());
1026 g_type_class_ref (gst_clock_flags_get_type ());
1027 g_type_class_ref (gst_debug_graph_details_get_type ());
1028 g_type_class_ref (gst_state_get_type ());
1029 g_type_class_ref (gst_state_change_return_get_type ());
1030 g_type_class_ref (gst_state_change_get_type ());
1031 g_type_class_ref (gst_element_flags_get_type ());
1032 g_type_class_ref (gst_core_error_get_type ());
1033 g_type_class_ref (gst_library_error_get_type ());
1034 g_type_class_ref (gst_resource_error_get_type ());
1035 g_type_class_ref (gst_stream_error_get_type ());
1036 g_type_class_ref (gst_event_type_flags_get_type ());
1037 g_type_class_ref (gst_event_type_get_type ());
1038 g_type_class_ref (gst_seek_type_get_type ());
1039 g_type_class_ref (gst_seek_flags_get_type ());
1040 g_type_class_ref (gst_format_get_type ());
1041 g_type_class_ref (gst_index_certainty_get_type ());
1042 g_type_class_ref (gst_index_entry_type_get_type ());
1043 g_type_class_ref (gst_index_lookup_method_get_type ());
1044 g_type_class_ref (gst_assoc_flags_get_type ());
1045 g_type_class_ref (gst_index_resolver_method_get_type ());
1046 g_type_class_ref (gst_index_flags_get_type ());
1047 g_type_class_ref (gst_debug_level_get_type ());
1048 g_type_class_ref (gst_debug_color_flags_get_type ());
1049 g_type_class_ref (gst_iterator_result_get_type ());
1050 g_type_class_ref (gst_iterator_item_get_type ());
1051 g_type_class_ref (gst_message_type_get_type ());
1052 g_type_class_ref (gst_mini_object_flags_get_type ());
1053 g_type_class_ref (gst_pad_link_return_get_type ());
1054 g_type_class_ref (gst_flow_return_get_type ());
1055 g_type_class_ref (gst_activate_mode_get_type ());
1056 g_type_class_ref (gst_pad_direction_get_type ());
1057 g_type_class_ref (gst_pad_flags_get_type ());
1058 g_type_class_ref (gst_pad_presence_get_type ());
1059 g_type_class_ref (gst_pad_template_flags_get_type ());
1060 g_type_class_ref (gst_pipeline_flags_get_type ());
1061 g_type_class_ref (gst_plugin_error_get_type ());
1062 g_type_class_ref (gst_plugin_flags_get_type ());
1063 g_type_class_ref (gst_plugin_dependency_flags_get_type ());
1064 g_type_class_ref (gst_rank_get_type ());
1065 g_type_class_ref (gst_query_type_get_type ());
1066 g_type_class_ref (gst_buffering_mode_get_type ());
1067 g_type_class_ref (gst_tag_merge_mode_get_type ());
1068 g_type_class_ref (gst_tag_flag_get_type ());
1069 g_type_class_ref (gst_task_state_get_type ());
1070 g_type_class_ref (gst_alloc_trace_flags_get_type ());
1071 g_type_class_ref (gst_type_find_probability_get_type ());
1072 g_type_class_ref (gst_uri_type_get_type ());
1073 g_type_class_ref (gst_parse_error_get_type ());
1074 g_type_class_ref (gst_parse_flags_get_type ());
1075 g_type_class_ref (gst_search_mode_get_type ());
1077 gst_structure_get_type ();
1078 _gst_value_initialize ();
1079 g_type_class_ref (gst_param_spec_fraction_get_type ());
1080 gst_caps_get_type ();
1081 _gst_event_initialize ();
1082 _gst_buffer_initialize ();
1083 _gst_message_initialize ();
1084 _gst_tag_initialize ();
1086 _gst_plugin_initialize ();
1088 gst_g_error_get_type ();
1090 /* register core plugins */
1091 gst_plugin_register_static (GST_VERSION_MAJOR, GST_VERSION_MINOR,
1092 "staticelements", "core elements linked into the GStreamer library",
1093 gst_register_core_elements, VERSION, GST_LICENSE, PACKAGE,
1094 GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
1097 * Any errors happening below this point are non-fatal, we therefore mark
1098 * gstreamer as being initialized, since it is the case from a plugin point of
1101 * If anything fails, it will be put back to FALSE in gst_init_check().
1102 * This allows some special plugins that would call gst_init() to not cause a
1103 * looping effect (i.e. initializing GStreamer twice).
1105 gst_initialized = TRUE;
1107 #ifndef GST_DISABLE_REGISTRY
1108 if (!ensure_current_registry (error))
1110 #endif /* GST_DISABLE_REGISTRY */
1112 /* if we need to preload plugins, do so now */
1113 g_slist_foreach (preload_plugins, load_plugin_func, NULL);
1114 /* keep preload_plugins around in case a re-scan is forced later on */
1116 #ifndef GST_DISABLE_TRACE
1118 if (_gst_trace_on) {
1119 gst_trace = gst_trace_new ("gst.trace", 1024);
1120 gst_trace_set_default (gst_trace);
1122 #endif /* GST_DISABLE_TRACE */
1127 #ifndef GST_DISABLE_GST_DEBUG
1129 select_all (GstPlugin * plugin, gpointer user_data)
1135 sort_by_category_name (gconstpointer a, gconstpointer b)
1137 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
1138 gst_debug_category_get_name ((GstDebugCategory *) b));
1142 gst_debug_help (void)
1144 GSList *list, *walk;
1147 /* Need to ensure the registry is loaded to get debug categories */
1148 if (!init_post (NULL, NULL, NULL, NULL))
1151 list2 = gst_registry_plugin_filter (gst_registry_get_default (),
1152 select_all, FALSE, NULL);
1154 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
1155 for (g = list2; g; g = g_list_next (g)) {
1156 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
1158 gst_plugin_load (plugin);
1160 g_list_free (list2);
1162 list = gst_debug_get_all_categories ();
1163 walk = list = g_slist_sort (list, sort_by_category_name);
1166 g_print ("name level description\n");
1167 g_print ("---------------------+--------+--------------------------------\n");
1170 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
1172 if (gst_debug_is_colored ()) {
1173 gchar *color = gst_debug_construct_term_color (cat->color);
1175 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
1177 gst_debug_category_get_name (cat),
1178 gst_debug_category_get_threshold (cat),
1179 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
1180 color, gst_debug_category_get_description (cat));
1183 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
1184 gst_debug_category_get_threshold (cat),
1185 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
1186 gst_debug_category_get_description (cat));
1188 walk = g_slist_next (walk);
1190 g_slist_free (list);
1195 #ifndef GST_DISABLE_OPTION_PARSING
1197 parse_one_option (gint opt, const gchar * arg, GError ** err)
1201 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
1203 case ARG_FATAL_WARNINGS:{
1204 GLogLevelFlags fatal_mask;
1206 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
1207 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
1208 g_log_set_always_fatal (fatal_mask);
1211 #ifndef GST_DISABLE_GST_DEBUG
1212 case ARG_DEBUG_LEVEL:{
1215 tmp = strtol (arg, NULL, 0);
1216 if (tmp >= 0 && tmp < GST_LEVEL_COUNT) {
1217 gst_debug_set_default_threshold (tmp);
1222 parse_debug_list (arg);
1224 case ARG_DEBUG_NO_COLOR:
1225 gst_debug_set_colored (FALSE);
1227 case ARG_DEBUG_DISABLE:
1228 gst_debug_set_active (FALSE);
1230 case ARG_DEBUG_HELP:
1234 case ARG_PLUGIN_SPEW:
1236 case ARG_PLUGIN_PATH:
1237 #ifndef GST_DISABLE_REGISTRY
1238 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
1239 #endif /* GST_DISABLE_REGISTRY */
1241 case ARG_PLUGIN_LOAD:
1242 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
1244 case ARG_SEGTRAP_DISABLE:
1245 _gst_disable_segtrap = TRUE;
1247 case ARG_REGISTRY_UPDATE_DISABLE:
1248 _gst_disable_registry_update = TRUE;
1250 case ARG_REGISTRY_FORK_DISABLE:
1251 _gst_enable_registry_fork = FALSE;
1254 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
1255 _("Unknown option"));
1263 parse_goption_arg (const gchar * opt,
1264 const gchar * arg, gpointer data, GError ** err)
1272 "--gst-version", ARG_VERSION}, {
1273 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
1274 #ifndef GST_DISABLE_GST_DEBUG
1276 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
1277 "--gst-debug", ARG_DEBUG}, {
1278 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
1279 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
1280 "--gst-debug-help", ARG_DEBUG_HELP},
1283 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
1284 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
1285 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
1286 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
1287 "--gst-disable-registry-update", ARG_REGISTRY_UPDATE_DISABLE}, {
1288 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
1293 for (n = 0; options[n].opt; n++) {
1294 if (!strcmp (opt, options[n].opt)) {
1295 val = options[n].val;
1300 return parse_one_option (val, arg, err);
1304 extern GstRegistry *_gst_registry_default;
1309 * Clean up any resources created by GStreamer in gst_init().
1311 * It is normally not needed to call this function in a normal application
1312 * as the resources will automatically be freed when the program terminates.
1313 * This function is therefore mostly used by testsuites and other memory
1316 * After this call GStreamer (including this method) should not be used anymore.
1323 GST_INFO ("deinitializing GStreamer");
1325 if (gst_deinitialized) {
1326 GST_DEBUG ("already deinitialized");
1330 g_slist_foreach (preload_plugins, (GFunc) g_free, NULL);
1331 g_slist_free (preload_plugins);
1332 preload_plugins = NULL;
1334 #ifndef GST_DISABLE_REGISTRY
1335 g_list_foreach (plugin_paths, (GFunc) g_free, NULL);
1336 g_list_free (plugin_paths);
1337 plugin_paths = NULL;
1340 clock = gst_system_clock_obtain ();
1341 gst_object_unref (clock);
1342 gst_object_unref (clock);
1344 _priv_gst_registry_cleanup ();
1346 g_type_class_unref (g_type_class_peek (gst_object_get_type ()));
1347 g_type_class_unref (g_type_class_peek (gst_pad_get_type ()));
1348 g_type_class_unref (g_type_class_peek (gst_element_factory_get_type ()));
1349 g_type_class_unref (g_type_class_peek (gst_element_get_type ()));
1350 g_type_class_unref (g_type_class_peek (gst_type_find_factory_get_type ()));
1351 g_type_class_unref (g_type_class_peek (gst_bin_get_type ()));
1352 g_type_class_unref (g_type_class_peek (gst_bus_get_type ()));
1353 g_type_class_unref (g_type_class_peek (gst_task_get_type ()));
1354 g_type_class_unref (g_type_class_peek (gst_index_factory_get_type ()));
1355 g_type_class_unref (g_type_class_peek (gst_object_flags_get_type ()));
1356 g_type_class_unref (g_type_class_peek (gst_bin_flags_get_type ()));
1357 g_type_class_unref (g_type_class_peek (gst_buffer_flag_get_type ()));
1358 g_type_class_unref (g_type_class_peek (gst_buffer_copy_flags_get_type ()));
1359 g_type_class_unref (g_type_class_peek (gst_bus_flags_get_type ()));
1360 g_type_class_unref (g_type_class_peek (gst_bus_sync_reply_get_type ()));
1361 g_type_class_unref (g_type_class_peek (gst_caps_flags_get_type ()));
1362 g_type_class_unref (g_type_class_peek (gst_clock_return_get_type ()));
1363 g_type_class_unref (g_type_class_peek (gst_clock_entry_type_get_type ()));
1364 g_type_class_unref (g_type_class_peek (gst_clock_flags_get_type ()));
1365 g_type_class_unref (g_type_class_peek (gst_debug_graph_details_get_type ()));
1366 g_type_class_unref (g_type_class_peek (gst_state_get_type ()));
1367 g_type_class_unref (g_type_class_peek (gst_state_change_return_get_type ()));
1368 g_type_class_unref (g_type_class_peek (gst_state_change_get_type ()));
1369 g_type_class_unref (g_type_class_peek (gst_element_flags_get_type ()));
1370 g_type_class_unref (g_type_class_peek (gst_core_error_get_type ()));
1371 g_type_class_unref (g_type_class_peek (gst_library_error_get_type ()));
1372 g_type_class_unref (g_type_class_peek (gst_resource_error_get_type ()));
1373 g_type_class_unref (g_type_class_peek (gst_stream_error_get_type ()));
1374 g_type_class_unref (g_type_class_peek (gst_event_type_flags_get_type ()));
1375 g_type_class_unref (g_type_class_peek (gst_event_type_get_type ()));
1376 g_type_class_unref (g_type_class_peek (gst_seek_type_get_type ()));
1377 g_type_class_unref (g_type_class_peek (gst_seek_flags_get_type ()));
1378 g_type_class_unref (g_type_class_peek (gst_format_get_type ()));
1379 g_type_class_unref (g_type_class_peek (gst_index_certainty_get_type ()));
1380 g_type_class_unref (g_type_class_peek (gst_index_entry_type_get_type ()));
1381 g_type_class_unref (g_type_class_peek (gst_index_lookup_method_get_type ()));
1382 g_type_class_unref (g_type_class_peek (gst_assoc_flags_get_type ()));
1383 g_type_class_unref (g_type_class_peek (gst_index_resolver_method_get_type
1385 g_type_class_unref (g_type_class_peek (gst_index_flags_get_type ()));
1386 g_type_class_unref (g_type_class_peek (gst_debug_level_get_type ()));
1387 g_type_class_unref (g_type_class_peek (gst_debug_color_flags_get_type ()));
1388 g_type_class_unref (g_type_class_peek (gst_iterator_result_get_type ()));
1389 g_type_class_unref (g_type_class_peek (gst_iterator_item_get_type ()));
1390 g_type_class_unref (g_type_class_peek (gst_message_type_get_type ()));
1391 g_type_class_unref (g_type_class_peek (gst_mini_object_flags_get_type ()));
1392 g_type_class_unref (g_type_class_peek (gst_pad_link_return_get_type ()));
1393 g_type_class_unref (g_type_class_peek (gst_flow_return_get_type ()));
1394 g_type_class_unref (g_type_class_peek (gst_activate_mode_get_type ()));
1395 g_type_class_unref (g_type_class_peek (gst_pad_direction_get_type ()));
1396 g_type_class_unref (g_type_class_peek (gst_pad_flags_get_type ()));
1397 g_type_class_unref (g_type_class_peek (gst_pad_presence_get_type ()));
1398 g_type_class_unref (g_type_class_peek (gst_pad_template_flags_get_type ()));
1399 g_type_class_unref (g_type_class_peek (gst_pipeline_flags_get_type ()));
1400 g_type_class_unref (g_type_class_peek (gst_plugin_error_get_type ()));
1401 g_type_class_unref (g_type_class_peek (gst_plugin_flags_get_type ()));
1402 g_type_class_unref (g_type_class_peek (gst_rank_get_type ()));
1403 g_type_class_unref (g_type_class_peek (gst_query_type_get_type ()));
1404 g_type_class_unref (g_type_class_peek (gst_buffering_mode_get_type ()));
1405 g_type_class_unref (g_type_class_peek (gst_tag_merge_mode_get_type ()));
1406 g_type_class_unref (g_type_class_peek (gst_tag_flag_get_type ()));
1407 g_type_class_unref (g_type_class_peek (gst_task_state_get_type ()));
1408 g_type_class_unref (g_type_class_peek (gst_alloc_trace_flags_get_type ()));
1409 g_type_class_unref (g_type_class_peek (gst_type_find_probability_get_type
1411 g_type_class_unref (g_type_class_peek (gst_uri_type_get_type ()));
1412 g_type_class_unref (g_type_class_peek (gst_parse_error_get_type ()));
1413 g_type_class_unref (g_type_class_peek (gst_param_spec_fraction_get_type ()));
1415 gst_deinitialized = TRUE;
1416 GST_INFO ("deinitialized GStreamer");
1421 * @major: pointer to a guint to store the major version number
1422 * @minor: pointer to a guint to store the minor version number
1423 * @micro: pointer to a guint to store the micro version number
1424 * @nano: pointer to a guint to store the nano version number
1426 * Gets the version number of the GStreamer library.
1429 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1431 g_return_if_fail (major);
1432 g_return_if_fail (minor);
1433 g_return_if_fail (micro);
1434 g_return_if_fail (nano);
1436 *major = GST_VERSION_MAJOR;
1437 *minor = GST_VERSION_MINOR;
1438 *micro = GST_VERSION_MICRO;
1439 *nano = GST_VERSION_NANO;
1443 * gst_version_string:
1445 * This function returns a string that is useful for describing this version
1446 * of GStreamer to the outside world: user agent strings, logging, ...
1448 * Returns: a newly allocated string describing this version of GStreamer.
1452 gst_version_string ()
1454 guint major, minor, micro, nano;
1456 gst_version (&major, &minor, µ, &nano);
1458 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1460 return g_strdup_printf ("GStreamer %d.%d.%d (GIT)", major, minor, micro);
1462 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1467 * gst_segtrap_is_enabled:
1469 * Some functions in the GStreamer core might install a custom SIGSEGV handler
1470 * to better catch and report errors to the application. Currently this feature
1471 * is enabled by default when loading plugins.
1473 * Applications might want to disable this behaviour with the
1474 * gst_segtrap_set_enabled() function. This is typically done if the application
1475 * wants to install its own handler without GStreamer interfering.
1477 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1482 gst_segtrap_is_enabled (void)
1484 /* yeps, it's enabled when it's not disabled */
1485 return !_gst_disable_segtrap;
1489 * gst_segtrap_set_enabled:
1490 * @enabled: whether a custom SIGSEGV handler should be installed.
1492 * Applications might want to disable/enable the SIGSEGV handling of
1493 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1498 gst_segtrap_set_enabled (gboolean enabled)
1500 _gst_disable_segtrap = !enabled;
1504 * gst_registry_fork_is_enabled:
1506 * By default GStreamer will perform a fork() when scanning and rebuilding the
1509 * Applications might want to disable this behaviour with the
1510 * gst_registry_fork_set_enabled() function.
1512 * Returns: %TRUE if GStreamer will use fork() when rebuilding the registry. On
1513 * platforms without fork(), this function will always return %FALSE.
1518 gst_registry_fork_is_enabled (void)
1520 return _gst_enable_registry_fork;
1524 * gst_registry_fork_set_enabled:
1525 * @enabled: whether rebuilding the registry may fork
1527 * Applications might want to disable/enable the usage of fork() when rebuilding
1528 * the registry. See gst_registry_fork_is_enabled() for more information.
1530 * On platforms without fork(), this function will have no effect on the return
1531 * value of gst_registry_fork_is_enabled().
1536 gst_registry_fork_set_enabled (gboolean enabled)
1539 _gst_enable_registry_fork = enabled;
1540 #endif /* HAVE_FORK */
1545 * gst_update_registry:
1547 * Forces GStreamer to re-scan its plugin paths and update the default
1550 * Applications will almost never need to call this function, it is only
1551 * useful if the application knows new plugins have been installed (or old
1552 * ones removed) since the start of the application (or, to be precise, the
1553 * first call to gst_init()) and the application wants to make use of any
1554 * newly-installed plugins without restarting the application.
1556 * Applications should assume that the registry update is neither atomic nor
1557 * thread-safe and should therefore not have any dynamic pipelines running
1558 * (including the playbin and decodebin elements) and should also not create
1559 * any elements or access the GStreamer registry while the update is in
1562 * Note that this function may block for a significant amount of time.
1564 * Returns: %TRUE if the registry has been updated successfully (does not
1565 * imply that there were changes), otherwise %FALSE.
1570 gst_update_registry (void)
1572 gboolean res = FALSE;
1574 #ifndef GST_DISABLE_REGISTRY
1577 res = ensure_current_registry (&err);
1579 GST_WARNING ("registry update failed: %s", err->message);
1582 GST_LOG ("registry update succeeded");
1585 if (preload_plugins) {
1586 g_slist_foreach (preload_plugins, load_plugin_func, NULL);
1589 GST_WARNING ("registry update failed: %s", "registry disabled");
1590 #endif /* GST_DISABLE_REGISTRY */