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
28 * GStreamer is a framework for constructing graphs of various filters
29 * (termed elements here) that will handle streaming media. Any discreet
30 * (packetizable) media type is supported, with provisions for automatically
31 * determining source type. Formatting/framing information is provided with
32 * a powerful negotiation framework. Plugins are heavily used to provide for
33 * all elements, allowing one to construct plugins outside of the GST
34 * library, even released binary-only if license require (please don't).
35 * GStreamer covers a wide range of use cases including: playback, recording,
36 * editing, serving streams, voice over ip and video calls.
38 * The <application>GStreamer</application> library should be initialized with
39 * gst_init() before it can be used. You should pass pointers to the main argc
40 * and argv variables so that GStreamer can process its own command line
41 * options, as shown in the following example.
44 * <title>Initializing the gstreamer library</title>
45 * <programlisting language="c">
47 * main (int argc, char *argv[])
49 * // initialize the GStreamer library
50 * gst_init (&argc, &argv);
56 * It's allowed to pass two NULL pointers to gst_init() in case you don't want
57 * to pass the command line args to GStreamer.
59 * You can also use GOption to initialize your own parameters as shown in
60 * the next code fragment:
62 * <title>Initializing own parameters when initializing gstreamer</title>
64 * static gboolean stats = FALSE;
67 * main (int argc, char *argv[])
69 * GOptionEntry options[] = {
70 * {"tags", 't', 0, G_OPTION_ARG_NONE, &tags,
71 * N_("Output tags (also known as metadata)"), NULL},
74 * // must initialise the threading system before using any other GLib funtion
75 * if (!g_thread_supported ())
76 * g_thread_init (NULL);
77 * ctx = g_option_context_new ("[ADDITIONAL ARGUMENTS]");
78 * g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
79 * g_option_context_add_group (ctx, gst_init_get_option_group ());
80 * if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
81 * g_print ("Error initializing: %s\n", GST_STR_NULL (err->message));
84 * g_option_context_free (ctx);
90 * Use gst_version() to query the library version at runtime or use the
91 * GST_VERSION_* macros to find the version at compile time. Optionally
92 * gst_version_string() returns a printable string.
94 * The gst_deinit() call is used to clean up all internal resources used
95 * by <application>GStreamer</application>. It is mostly used in unit tests
98 * Last reviewed on 2006-08-11 (0.10.10)
101 #include "gst_private.h"
102 #include "gstconfig.h"
105 #include <sys/types.h>
106 #ifdef HAVE_SYS_UTSNAME_H
107 #include <sys/utsname.h>
113 #define WIN32_LEAN_AND_MEAN /* prevents from including too many things */
114 #include <windows.h> /* GetStdHandle, windows console */
117 #include "gst-i18n-lib.h"
118 #include <locale.h> /* for LC_ALL */
121 #include "gsttrace.h"
123 #define GST_CAT_DEFAULT GST_CAT_GST_INIT
125 #define MAX_PATH_SPLIT 16
126 #define GST_PLUGIN_SEPARATOR ","
128 static gboolean gst_initialized = FALSE;
129 static gboolean gst_deinitialized = FALSE;
132 HMODULE _priv_gst_dll_handle = NULL;
135 #ifndef GST_DISABLE_REGISTRY
136 GList *_priv_gst_plugin_paths = NULL; /* for delayed processing in post_init */
138 extern gboolean _priv_gst_disable_registry_update;
141 #ifndef GST_DISABLE_GST_DEBUG
142 const gchar *priv_gst_dump_dot_dir;
147 /* set to TRUE when segfaults need to be left as is */
148 static gboolean _gst_disable_segtrap = FALSE;
150 static gboolean init_pre (GOptionContext * context, GOptionGroup * group,
151 gpointer data, GError ** error);
152 static gboolean init_post (GOptionContext * context, GOptionGroup * group,
153 gpointer data, GError ** error);
154 #ifndef GST_DISABLE_OPTION_PARSING
155 static gboolean parse_goption_arg (const gchar * s_opt,
156 const gchar * arg, gpointer data, GError ** err);
159 GSList *_priv_gst_preload_plugins = NULL;
161 const gchar g_log_domain_gstreamer[] = "GStreamer";
164 debug_log_handler (const gchar * log_domain,
165 GLogLevelFlags log_level, const gchar * message, gpointer user_data)
167 g_log_default_handler (log_domain, log_level, message, user_data);
168 /* FIXME: do we still need this ? fatal errors these days are all
169 * other than core errors */
170 /* g_on_error_query (NULL); */
177 #ifndef GST_DISABLE_GST_DEBUG
188 ARG_REGISTRY_UPDATE_DISABLE,
189 ARG_REGISTRY_FORK_DISABLE
192 /* debug-spec ::= category-spec [, category-spec]*
193 * category-spec ::= category:val | val
202 #ifndef GST_DISABLE_GST_DEBUG
204 parse_debug_category (gchar * str, const gchar ** category)
221 parse_debug_level (gchar * str, GstDebugLevel * level)
229 if (str[0] != NUL && str[1] == NUL
230 && str[0] >= '0' && str[0] < '0' + GST_LEVEL_COUNT) {
231 *level = (GstDebugLevel) (str[0] - '0');
239 parse_debug_list (const gchar * list)
246 split = g_strsplit (list, ",", 0);
248 for (walk = split; *walk; walk++) {
249 if (strchr (*walk, ':')) {
250 gchar **values = g_strsplit (*walk, ":", 2);
252 if (values[0] && values[1]) {
254 const gchar *category;
256 if (parse_debug_category (values[0], &category)
257 && parse_debug_level (values[1], &level))
258 gst_debug_set_threshold_for_name (category, level);
265 if (parse_debug_level (*walk, &level))
266 gst_debug_set_default_threshold (level);
275 BOOL WINAPI DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
277 DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
279 if (fdwReason == DLL_PROCESS_ATTACH)
280 _priv_gst_dll_handle = (HMODULE) hinstDLL;
287 * gst_init_get_option_group: (skip)
289 * Returns a #GOptionGroup with GStreamer's argument specifications. The
290 * group is set up to use standard GOption callbacks, so when using this
291 * group in combination with GOption parsing methods, all argument parsing
292 * and initialization is automated.
294 * This function is useful if you want to integrate GStreamer with other
295 * libraries that use GOption (see g_option_context_add_group() ).
297 * If you use this function, you should make sure you initialise the GLib
298 * threading system as one of the very first things in your program
299 * (see the example at the beginning of this section).
301 * Returns: (transfer full): a pointer to GStreamer's option group.
305 gst_init_get_option_group (void)
307 #ifndef GST_DISABLE_OPTION_PARSING
309 static const GOptionEntry gst_args[] = {
310 {"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
311 (gpointer) parse_goption_arg, N_("Print the GStreamer version"), NULL},
312 {"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
313 (gpointer) parse_goption_arg, N_("Make all warnings fatal"), NULL},
314 #ifndef GST_DISABLE_GST_DEBUG
315 {"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
316 (gpointer) parse_goption_arg,
317 N_("Print available debug categories and exit"),
319 {"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK,
320 (gpointer) parse_goption_arg,
321 N_("Default debug level from 1 (only error) to 5 (anything) or "
324 {"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) parse_goption_arg,
325 N_("Comma-separated list of category_name:level pairs to set "
326 "specific levels for the individual categories. Example: "
327 "GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
329 {"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
330 (gpointer) parse_goption_arg, N_("Disable colored debugging output"),
332 {"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
333 (gpointer) parse_goption_arg, N_("Disable debugging"), NULL},
335 {"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
336 (gpointer) parse_goption_arg,
337 N_("Enable verbose plugin loading diagnostics"),
339 {"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK,
340 (gpointer) parse_goption_arg,
341 N_("Colon-separated paths containing plugins"), N_("PATHS")},
342 {"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK,
343 (gpointer) parse_goption_arg,
344 N_("Comma-separated list of plugins to preload in addition to the "
345 "list stored in environment variable GST_PLUGIN_PATH"),
347 {"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
348 (gpointer) parse_goption_arg,
349 N_("Disable trapping of segmentation faults during plugin loading"),
351 {"gst-disable-registry-update", 0, G_OPTION_FLAG_NO_ARG,
352 G_OPTION_ARG_CALLBACK,
353 (gpointer) parse_goption_arg,
354 N_("Disable updating the registry"),
356 {"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
357 G_OPTION_ARG_CALLBACK,
358 (gpointer) parse_goption_arg,
359 N_("Disable spawning a helper process while scanning the registry"),
364 group = g_option_group_new ("gst", _("GStreamer Options"),
365 _("Show GStreamer Options"), NULL, NULL);
366 g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
367 (GOptionParseFunc) init_post);
369 g_option_group_add_entries (group, gst_args);
370 g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
380 * @argc: (inout) (allow-none): pointer to application's argc
381 * @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
382 * @err: pointer to a #GError to which a message will be posted on error
384 * Initializes the GStreamer library, setting up internal path lists,
385 * registering built-in elements, and loading standard plugins.
387 * This function will return %FALSE if GStreamer could not be initialized
388 * for some reason. If you want your program to fail fatally,
389 * use gst_init() instead.
391 * This function should be called before calling any other GLib functions. If
392 * this is not an option, your program must initialise the GLib thread system
393 * using g_thread_init() before any other GLib functions are called.
395 * Returns: %TRUE if GStreamer could be initialized.
398 gst_init_check (int *argc, char **argv[], GError ** err)
400 #ifndef GST_DISABLE_OPTION_PARSING
406 if (gst_initialized) {
407 GST_DEBUG ("already initialized gst");
410 #ifndef GST_DISABLE_OPTION_PARSING
411 ctx = g_option_context_new ("- GStreamer initialization");
412 g_option_context_set_ignore_unknown_options (ctx, TRUE);
413 group = gst_init_get_option_group ();
414 g_option_context_add_group (ctx, group);
415 res = g_option_context_parse (ctx, argc, argv, err);
416 g_option_context_free (ctx);
418 init_pre (NULL, NULL, NULL, NULL);
419 init_post (NULL, NULL, NULL, NULL);
423 gst_initialized = res;
426 GST_INFO ("initialized GStreamer successfully");
428 GST_INFO ("failed to initialize GStreamer");
436 * @argc: (inout) (allow-none): pointer to application's argc
437 * @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
439 * Initializes the GStreamer library, setting up internal path lists,
440 * registering built-in elements, and loading standard plugins.
442 * Unless the plugin registry is disabled at compile time, the registry will be
443 * loaded. By default this will also check if the registry cache needs to be
444 * updated and rescan all plugins if needed. See gst_update_registry() for
445 * details and section
446 * <link linkend="gst-running">Running GStreamer Applications</link>
447 * for how to disable automatic registry updates.
449 * This function should be called before calling any other GLib functions. If
450 * this is not an option, your program must initialise the GLib thread system
451 * using g_thread_init() before any other GLib functions are called.
454 * This function will terminate your program if it was unable to initialize
455 * GStreamer for some reason. If you want your program to fall back,
456 * use gst_init_check() instead.
459 * WARNING: This function does not work in the same way as corresponding
460 * functions in other glib-style libraries, such as gtk_init(). In
461 * particular, unknown command line options cause this function to
462 * abort program execution.
465 gst_init (int *argc, char **argv[])
469 if (!gst_init_check (argc, argv, &err)) {
470 g_print ("Could not initialize GStreamer: %s\n",
471 err ? err->message : "unknown error occurred");
480 * gst_is_initialized:
482 * Use this function to check if GStreamer has been initialized with gst_init()
483 * or gst_init_check().
485 * Returns: TRUE if initialization has been done, FALSE otherwise.
488 gst_is_initialized (void)
490 return gst_initialized;
493 #ifndef GST_DISABLE_REGISTRY
495 add_path_func (gpointer data, gpointer user_data)
497 GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
498 _priv_gst_plugin_paths =
499 g_list_append (_priv_gst_plugin_paths, g_strdup (data));
503 #ifndef GST_DISABLE_OPTION_PARSING
505 prepare_for_load_plugin_func (gpointer data, gpointer user_data)
507 _priv_gst_preload_plugins =
508 g_slist_prepend (_priv_gst_preload_plugins, g_strdup (data));
512 #ifndef GST_DISABLE_OPTION_PARSING
514 split_and_iterate (const gchar * stringlist, const gchar * separator,
515 GFunc iterator, gpointer user_data)
519 gchar *lastlist = g_strdup (stringlist);
522 strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
527 iterator (strings[j], user_data);
528 if (++j == MAX_PATH_SPLIT) {
529 lastlist = g_strdup (strings[j]);
534 g_strfreev (strings);
539 /* we have no fail cases yet, but maybe in the future */
541 init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
544 if (gst_initialized) {
545 GST_DEBUG ("already initialized");
551 #ifndef GST_DISABLE_GST_DEBUG
552 _priv_gst_debug_init ();
556 setlocale (LC_ALL, "");
557 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
558 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
559 #endif /* ENABLE_NLS */
561 #ifndef GST_DISABLE_GST_DEBUG
563 const gchar *debug_list;
565 if (g_getenv ("GST_DEBUG_NO_COLOR") != NULL)
566 gst_debug_set_colored (FALSE);
568 debug_list = g_getenv ("GST_DEBUG");
570 parse_debug_list (debug_list);
574 priv_gst_dump_dot_dir = g_getenv ("GST_DEBUG_DUMP_DOT_DIR");
576 /* This is the earliest we can make stuff show up in the logs.
577 * So give some useful info about GStreamer here */
578 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
579 GST_INFO ("Using library installed in %s", LIBDIR);
581 /* Print some basic system details if possible (OS/architecture) */
582 #ifdef HAVE_SYS_UTSNAME_H
584 struct utsname sys_details;
586 if (uname (&sys_details) == 0) {
587 GST_INFO ("%s %s %s %s %s", sys_details.sysname,
588 sys_details.nodename, sys_details.release, sys_details.version,
589 sys_details.machine);
598 gst_register_core_elements (GstPlugin * plugin)
600 /* register some standard builtin types */
601 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
603 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
606 g_assert_not_reached ();
613 * - initalization of threads if we use them
616 * - initializes gst_format
617 * - registers a bunch of types for gst_objects
619 * - we don't have cases yet where this fails, but in the future
620 * we might and then it's nice to be able to return that
623 init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
628 if (gst_initialized) {
629 GST_DEBUG ("already initialized");
633 llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
634 g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
636 #ifndef GST_DISABLE_TRACE
637 _priv_gst_alloc_trace_initialize ();
640 _priv_gst_mini_object_initialize ();
641 _priv_gst_quarks_initialize ();
642 _priv_gst_memory_initialize ();
643 _priv_gst_format_initialize ();
644 _priv_gst_query_initialize ();
645 _priv_gst_structure_initialize ();
646 _priv_gst_caps_initialize ();
647 _priv_gst_meta_initialize ();
649 g_type_class_ref (gst_object_get_type ());
650 g_type_class_ref (gst_pad_get_type ());
651 g_type_class_ref (gst_element_factory_get_type ());
652 g_type_class_ref (gst_element_get_type ());
653 g_type_class_ref (gst_type_find_factory_get_type ());
654 g_type_class_ref (gst_bin_get_type ());
655 g_type_class_ref (gst_bus_get_type ());
656 g_type_class_ref (gst_task_get_type ());
657 g_type_class_ref (gst_clock_get_type ());
659 gst_uri_handler_get_type ();
661 g_type_class_ref (gst_object_flags_get_type ());
662 g_type_class_ref (gst_bin_flags_get_type ());
663 g_type_class_ref (gst_buffer_flags_get_type ());
664 g_type_class_ref (gst_buffer_copy_flags_get_type ());
665 g_type_class_ref (gst_bus_flags_get_type ());
666 g_type_class_ref (gst_bus_sync_reply_get_type ());
667 g_type_class_ref (gst_caps_flags_get_type ());
668 g_type_class_ref (gst_clock_return_get_type ());
669 g_type_class_ref (gst_clock_entry_type_get_type ());
670 g_type_class_ref (gst_clock_flags_get_type ());
671 g_type_class_ref (gst_clock_type_get_type ());
672 g_type_class_ref (gst_debug_graph_details_get_type ());
673 g_type_class_ref (gst_state_get_type ());
674 g_type_class_ref (gst_state_change_return_get_type ());
675 g_type_class_ref (gst_state_change_get_type ());
676 g_type_class_ref (gst_element_flags_get_type ());
677 g_type_class_ref (gst_core_error_get_type ());
678 g_type_class_ref (gst_library_error_get_type ());
679 g_type_class_ref (gst_resource_error_get_type ());
680 g_type_class_ref (gst_stream_error_get_type ());
681 g_type_class_ref (gst_event_type_flags_get_type ());
682 g_type_class_ref (gst_event_type_get_type ());
683 g_type_class_ref (gst_seek_type_get_type ());
684 g_type_class_ref (gst_seek_flags_get_type ());
685 g_type_class_ref (gst_stream_config_flags_get_type ());
686 g_type_class_ref (gst_qos_type_get_type ());
687 g_type_class_ref (gst_format_get_type ());
688 g_type_class_ref (gst_debug_level_get_type ());
689 g_type_class_ref (gst_debug_color_flags_get_type ());
690 g_type_class_ref (gst_iterator_result_get_type ());
691 g_type_class_ref (gst_iterator_item_get_type ());
692 g_type_class_ref (gst_message_type_get_type ());
693 g_type_class_ref (gst_mini_object_flags_get_type ());
694 g_type_class_ref (gst_pad_link_return_get_type ());
695 g_type_class_ref (gst_pad_link_check_get_type ());
696 g_type_class_ref (gst_flow_return_get_type ());
697 g_type_class_ref (gst_pad_mode_get_type ());
698 g_type_class_ref (gst_pad_direction_get_type ());
699 g_type_class_ref (gst_pad_flags_get_type ());
700 g_type_class_ref (gst_pad_presence_get_type ());
701 g_type_class_ref (gst_pad_template_flags_get_type ());
702 g_type_class_ref (gst_pipeline_flags_get_type ());
703 g_type_class_ref (gst_plugin_error_get_type ());
704 g_type_class_ref (gst_plugin_flags_get_type ());
705 g_type_class_ref (gst_plugin_dependency_flags_get_type ());
706 g_type_class_ref (gst_rank_get_type ());
707 g_type_class_ref (gst_query_type_flags_get_type ());
708 g_type_class_ref (gst_query_type_get_type ());
709 g_type_class_ref (gst_buffering_mode_get_type ());
710 g_type_class_ref (gst_stream_status_type_get_type ());
711 g_type_class_ref (gst_structure_change_type_get_type ());
712 g_type_class_ref (gst_tag_merge_mode_get_type ());
713 g_type_class_ref (gst_tag_flag_get_type ());
714 g_type_class_ref (gst_task_pool_get_type ());
715 g_type_class_ref (gst_task_state_get_type ());
716 g_type_class_ref (gst_toc_entry_type_get_type ());
717 g_type_class_ref (gst_type_find_probability_get_type ());
718 g_type_class_ref (gst_uri_error_get_type ());
719 g_type_class_ref (gst_uri_type_get_type ());
720 g_type_class_ref (gst_parse_error_get_type ());
721 g_type_class_ref (gst_parse_flags_get_type ());
722 g_type_class_ref (gst_search_mode_get_type ());
723 g_type_class_ref (gst_progress_type_get_type ());
724 g_type_class_ref (gst_buffer_pool_acquire_flags_get_type ());
725 g_type_class_ref (gst_memory_flags_get_type ());
726 g_type_class_ref (gst_map_flags_get_type ());
727 g_type_class_ref (gst_caps_intersect_mode_get_type ());
728 g_type_class_ref (gst_pad_probe_type_get_type ());
729 g_type_class_ref (gst_pad_probe_return_get_type ());
730 g_type_class_ref (gst_segment_flags_get_type ());
731 g_type_class_ref (gst_scheduling_flags_get_type ());
732 g_type_class_ref (gst_meta_flags_get_type ());
733 g_type_class_ref (gst_toc_entry_type_get_type ());
734 g_type_class_ref (gst_toc_scope_get_type ());
735 g_type_class_ref (gst_control_binding_get_type ());
736 g_type_class_ref (gst_control_source_get_type ());
737 g_type_class_ref (gst_lock_flags_get_type ());
738 g_type_class_ref (gst_allocator_flags_get_type ());
740 _priv_gst_event_initialize ();
741 _priv_gst_buffer_initialize ();
742 _priv_gst_message_initialize ();
743 _priv_gst_buffer_list_initialize ();
744 _priv_gst_sample_initialize ();
745 _priv_gst_value_initialize ();
747 g_type_class_ref (gst_param_spec_fraction_get_type ());
748 _priv_gst_tag_initialize ();
749 gst_parse_context_get_type ();
751 _priv_gst_plugin_initialize ();
753 /* register core plugins */
754 gst_plugin_register_static (GST_VERSION_MAJOR, GST_VERSION_MINOR,
755 "staticelements", "core elements linked into the GStreamer library",
756 gst_register_core_elements, VERSION, GST_LICENSE, PACKAGE,
757 GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
760 * Any errors happening below this point are non-fatal, we therefore mark
761 * gstreamer as being initialized, since it is the case from a plugin point of
764 * If anything fails, it will be put back to FALSE in gst_init_check().
765 * This allows some special plugins that would call gst_init() to not cause a
766 * looping effect (i.e. initializing GStreamer twice).
768 gst_initialized = TRUE;
770 if (!gst_update_registry ())
773 GST_INFO ("GLib runtime version: %d.%d.%d", glib_major_version,
774 glib_minor_version, glib_micro_version);
775 GST_INFO ("GLib headers version: %d.%d.%d", GLIB_MAJOR_VERSION,
776 GLIB_MINOR_VERSION, GLIB_MICRO_VERSION);
781 #ifndef GST_DISABLE_GST_DEBUG
783 select_all (GstPlugin * plugin, gpointer user_data)
789 sort_by_category_name (gconstpointer a, gconstpointer b)
791 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
792 gst_debug_category_get_name ((GstDebugCategory *) b));
796 gst_debug_help (void)
801 /* Need to ensure the registry is loaded to get debug categories */
802 if (!init_post (NULL, NULL, NULL, NULL))
805 list2 = gst_registry_plugin_filter (gst_registry_get (),
806 select_all, FALSE, NULL);
808 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
809 for (g = list2; g; g = g_list_next (g)) {
810 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
812 gst_plugin_load (plugin);
816 list = gst_debug_get_all_categories ();
817 walk = list = g_slist_sort (list, sort_by_category_name);
820 g_print ("name level description\n");
821 g_print ("---------------------+--------+--------------------------------\n");
824 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
826 if (gst_debug_is_colored ()) {
828 gint color = gst_debug_construct_win_color (cat->color);
829 const gint clear = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
831 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
832 g_print ("%-20s", gst_debug_category_get_name (cat));
833 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
834 g_print (" %1d %s ", gst_debug_category_get_threshold (cat),
835 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)));
836 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
837 g_print ("%s", gst_debug_category_get_description (cat));
838 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
840 #else /* G_OS_WIN32 */
841 gchar *color = gst_debug_construct_term_color (cat->color);
843 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
845 gst_debug_category_get_name (cat),
846 gst_debug_category_get_threshold (cat),
847 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
848 color, gst_debug_category_get_description (cat));
850 #endif /* G_OS_WIN32 */
852 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
853 gst_debug_category_get_threshold (cat),
854 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
855 gst_debug_category_get_description (cat));
857 walk = g_slist_next (walk);
864 #ifndef GST_DISABLE_OPTION_PARSING
866 parse_one_option (gint opt, const gchar * arg, GError ** err)
870 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
872 case ARG_FATAL_WARNINGS:{
873 GLogLevelFlags fatal_mask;
875 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
876 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
877 g_log_set_always_fatal (fatal_mask);
880 #ifndef GST_DISABLE_GST_DEBUG
881 case ARG_DEBUG_LEVEL:{
882 GstDebugLevel tmp = GST_LEVEL_NONE;
884 tmp = (GstDebugLevel) strtol (arg, NULL, 0);
885 if (((guint) tmp) < GST_LEVEL_COUNT) {
886 gst_debug_set_default_threshold (tmp);
891 parse_debug_list (arg);
893 case ARG_DEBUG_NO_COLOR:
894 gst_debug_set_colored (FALSE);
896 case ARG_DEBUG_DISABLE:
897 gst_debug_set_active (FALSE);
903 case ARG_PLUGIN_SPEW:
905 case ARG_PLUGIN_PATH:
906 #ifndef GST_DISABLE_REGISTRY
907 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
908 #endif /* GST_DISABLE_REGISTRY */
910 case ARG_PLUGIN_LOAD:
911 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
913 case ARG_SEGTRAP_DISABLE:
914 _gst_disable_segtrap = TRUE;
916 case ARG_REGISTRY_UPDATE_DISABLE:
917 #ifndef GST_DISABLE_REGISTRY
918 _priv_gst_disable_registry_update = TRUE;
921 case ARG_REGISTRY_FORK_DISABLE:
922 gst_registry_fork_set_enabled (FALSE);
925 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
926 _("Unknown option"));
934 parse_goption_arg (const gchar * opt,
935 const gchar * arg, gpointer data, GError ** err)
943 "--gst-version", ARG_VERSION}, {
944 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
945 #ifndef GST_DISABLE_GST_DEBUG
947 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
948 "--gst-debug", ARG_DEBUG}, {
949 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
950 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
951 "--gst-debug-help", ARG_DEBUG_HELP},
954 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
955 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
956 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
957 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
958 "--gst-disable-registry-update", ARG_REGISTRY_UPDATE_DISABLE}, {
959 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
964 for (n = 0; options[n].opt; n++) {
965 if (!strcmp (opt, options[n].opt)) {
966 val = options[n].val;
971 return parse_one_option (val, arg, err);
978 * Clean up any resources created by GStreamer in gst_init().
980 * It is normally not needed to call this function in a normal application
981 * as the resources will automatically be freed when the program terminates.
982 * This function is therefore mostly used by testsuites and other memory
985 * After this call GStreamer (including this method) should not be used anymore.
992 GST_INFO ("deinitializing GStreamer");
994 if (gst_deinitialized) {
995 GST_DEBUG ("already deinitialized");
999 g_slist_foreach (_priv_gst_preload_plugins, (GFunc) g_free, NULL);
1000 g_slist_free (_priv_gst_preload_plugins);
1001 _priv_gst_preload_plugins = NULL;
1003 #ifndef GST_DISABLE_REGISTRY
1004 g_list_foreach (_priv_gst_plugin_paths, (GFunc) g_free, NULL);
1005 g_list_free (_priv_gst_plugin_paths);
1006 _priv_gst_plugin_paths = NULL;
1009 clock = gst_system_clock_obtain ();
1010 gst_object_unref (clock);
1011 gst_object_unref (clock);
1013 _priv_gst_registry_cleanup ();
1015 #ifndef GST_DISABLE_TRACE
1016 _priv_gst_alloc_trace_deinit ();
1019 g_type_class_unref (g_type_class_peek (gst_object_get_type ()));
1020 g_type_class_unref (g_type_class_peek (gst_pad_get_type ()));
1021 g_type_class_unref (g_type_class_peek (gst_element_factory_get_type ()));
1022 g_type_class_unref (g_type_class_peek (gst_element_get_type ()));
1023 g_type_class_unref (g_type_class_peek (gst_type_find_factory_get_type ()));
1024 g_type_class_unref (g_type_class_peek (gst_bin_get_type ()));
1025 g_type_class_unref (g_type_class_peek (gst_bus_get_type ()));
1026 g_type_class_unref (g_type_class_peek (gst_task_get_type ()));
1027 g_type_class_unref (g_type_class_peek (gst_object_flags_get_type ()));
1028 g_type_class_unref (g_type_class_peek (gst_bin_flags_get_type ()));
1029 g_type_class_unref (g_type_class_peek (gst_buffer_flags_get_type ()));
1030 g_type_class_unref (g_type_class_peek (gst_buffer_copy_flags_get_type ()));
1031 g_type_class_unref (g_type_class_peek (gst_bus_flags_get_type ()));
1032 g_type_class_unref (g_type_class_peek (gst_bus_sync_reply_get_type ()));
1033 g_type_class_unref (g_type_class_peek (gst_caps_flags_get_type ()));
1034 g_type_class_unref (g_type_class_peek (gst_clock_type_get_type ()));
1035 g_type_class_unref (g_type_class_peek (gst_clock_return_get_type ()));
1036 g_type_class_unref (g_type_class_peek (gst_clock_entry_type_get_type ()));
1037 g_type_class_unref (g_type_class_peek (gst_clock_flags_get_type ()));
1038 g_type_class_unref (g_type_class_peek (gst_debug_graph_details_get_type ()));
1039 g_type_class_unref (g_type_class_peek (gst_state_get_type ()));
1040 g_type_class_unref (g_type_class_peek (gst_state_change_return_get_type ()));
1041 g_type_class_unref (g_type_class_peek (gst_state_change_get_type ()));
1042 g_type_class_unref (g_type_class_peek (gst_element_flags_get_type ()));
1043 g_type_class_unref (g_type_class_peek (gst_core_error_get_type ()));
1044 g_type_class_unref (g_type_class_peek (gst_library_error_get_type ()));
1045 g_type_class_unref (g_type_class_peek (gst_plugin_dependency_flags_get_type
1047 g_type_class_unref (g_type_class_peek (gst_parse_flags_get_type ()));
1048 g_type_class_unref (g_type_class_peek (gst_resource_error_get_type ()));
1049 g_type_class_unref (g_type_class_peek (gst_search_mode_get_type ()));
1050 g_type_class_unref (g_type_class_peek (gst_stream_config_flags_get_type ()));
1051 g_type_class_unref (g_type_class_peek (gst_stream_error_get_type ()));
1052 g_type_class_unref (g_type_class_peek (gst_stream_status_type_get_type ()));
1053 g_type_class_unref (g_type_class_peek (gst_structure_change_type_get_type
1055 g_type_class_unref (g_type_class_peek (gst_event_type_flags_get_type ()));
1056 g_type_class_unref (g_type_class_peek (gst_event_type_get_type ()));
1057 g_type_class_unref (g_type_class_peek (gst_seek_type_get_type ()));
1058 g_type_class_unref (g_type_class_peek (gst_seek_flags_get_type ()));
1059 g_type_class_unref (g_type_class_peek (gst_qos_type_get_type ()));
1060 g_type_class_unref (g_type_class_peek (gst_format_get_type ()));
1061 g_type_class_unref (g_type_class_peek (gst_debug_level_get_type ()));
1062 g_type_class_unref (g_type_class_peek (gst_debug_color_flags_get_type ()));
1063 g_type_class_unref (g_type_class_peek (gst_iterator_result_get_type ()));
1064 g_type_class_unref (g_type_class_peek (gst_iterator_item_get_type ()));
1065 g_type_class_unref (g_type_class_peek (gst_message_type_get_type ()));
1066 g_type_class_unref (g_type_class_peek (gst_meta_flags_get_type ()));
1067 g_type_class_unref (g_type_class_peek (gst_mini_object_flags_get_type ()));
1068 g_type_class_unref (g_type_class_peek (gst_pad_link_return_get_type ()));
1069 g_type_class_unref (g_type_class_peek (gst_pad_link_check_get_type ()));
1070 g_type_class_unref (g_type_class_peek (gst_flow_return_get_type ()));
1071 g_type_class_unref (g_type_class_peek (gst_pad_mode_get_type ()));
1072 g_type_class_unref (g_type_class_peek (gst_pad_direction_get_type ()));
1073 g_type_class_unref (g_type_class_peek (gst_pad_flags_get_type ()));
1074 g_type_class_unref (g_type_class_peek (gst_pad_presence_get_type ()));
1075 g_type_class_unref (g_type_class_peek (gst_pad_template_flags_get_type ()));
1076 g_type_class_unref (g_type_class_peek (gst_pipeline_flags_get_type ()));
1077 g_type_class_unref (g_type_class_peek (gst_plugin_error_get_type ()));
1078 g_type_class_unref (g_type_class_peek (gst_plugin_flags_get_type ()));
1079 g_type_class_unref (g_type_class_peek (gst_rank_get_type ()));
1080 g_type_class_unref (g_type_class_peek (gst_query_type_flags_get_type ()));
1081 g_type_class_unref (g_type_class_peek (gst_query_type_get_type ()));
1082 g_type_class_unref (g_type_class_peek (gst_buffering_mode_get_type ()));
1083 g_type_class_unref (g_type_class_peek (gst_tag_merge_mode_get_type ()));
1084 g_type_class_unref (g_type_class_peek (gst_tag_flag_get_type ()));
1085 g_type_class_unref (g_type_class_peek (gst_task_state_get_type ()));
1086 g_type_class_unref (g_type_class_peek (gst_toc_entry_type_get_type ()));
1087 g_type_class_unref (g_type_class_peek (gst_toc_scope_get_type ()));
1088 g_type_class_unref (g_type_class_peek (gst_type_find_probability_get_type
1090 g_type_class_unref (g_type_class_peek (gst_uri_type_get_type ()));
1091 g_type_class_unref (g_type_class_peek (gst_uri_error_get_type ()));
1092 g_type_class_unref (g_type_class_peek (gst_parse_error_get_type ()));
1093 g_type_class_unref (g_type_class_peek (gst_param_spec_fraction_get_type ()));
1094 g_type_class_unref (g_type_class_peek (gst_progress_type_get_type ()));
1095 g_type_class_unref (g_type_class_peek (gst_buffer_pool_acquire_flags_get_type
1097 g_type_class_unref (g_type_class_peek (gst_memory_flags_get_type ()));
1098 g_type_class_unref (g_type_class_peek (gst_map_flags_get_type ()));
1099 g_type_class_unref (g_type_class_peek (gst_caps_intersect_mode_get_type ()));
1100 g_type_class_unref (g_type_class_peek (gst_pad_probe_type_get_type ()));
1101 g_type_class_unref (g_type_class_peek (gst_pad_probe_return_get_type ()));
1102 g_type_class_unref (g_type_class_peek (gst_segment_flags_get_type ()));
1103 g_type_class_unref (g_type_class_peek (gst_scheduling_flags_get_type ()));
1105 g_type_class_unref (g_type_class_peek (gst_control_binding_get_type ()));
1106 g_type_class_unref (g_type_class_peek (gst_control_source_get_type ()));
1107 g_type_class_unref (g_type_class_peek (gst_toc_entry_type_get_type ()));
1108 g_type_class_unref (g_type_class_peek (gst_lock_flags_get_type ()));
1109 g_type_class_unref (g_type_class_peek (gst_allocator_flags_get_type ()));
1112 gst_deinitialized = TRUE;
1113 GST_INFO ("deinitialized GStreamer");
1118 * @major: (out): pointer to a guint to store the major version number
1119 * @minor: (out): pointer to a guint to store the minor version number
1120 * @micro: (out): pointer to a guint to store the micro version number
1121 * @nano: (out): pointer to a guint to store the nano version number
1123 * Gets the version number of the GStreamer library.
1126 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1128 g_return_if_fail (major);
1129 g_return_if_fail (minor);
1130 g_return_if_fail (micro);
1131 g_return_if_fail (nano);
1133 *major = GST_VERSION_MAJOR;
1134 *minor = GST_VERSION_MINOR;
1135 *micro = GST_VERSION_MICRO;
1136 *nano = GST_VERSION_NANO;
1140 * gst_version_string:
1142 * This function returns a string that is useful for describing this version
1143 * of GStreamer to the outside world: user agent strings, logging, ...
1145 * Returns: (transfer full): a newly allocated string describing this version
1150 gst_version_string (void)
1152 guint major, minor, micro, nano;
1154 gst_version (&major, &minor, µ, &nano);
1156 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1158 return g_strdup_printf ("GStreamer %d.%d.%d (GIT)", major, minor, micro);
1160 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1165 * gst_segtrap_is_enabled:
1167 * Some functions in the GStreamer core might install a custom SIGSEGV handler
1168 * to better catch and report errors to the application. Currently this feature
1169 * is enabled by default when loading plugins.
1171 * Applications might want to disable this behaviour with the
1172 * gst_segtrap_set_enabled() function. This is typically done if the application
1173 * wants to install its own handler without GStreamer interfering.
1175 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1178 gst_segtrap_is_enabled (void)
1180 /* yeps, it's enabled when it's not disabled */
1181 return !_gst_disable_segtrap;
1185 * gst_segtrap_set_enabled:
1186 * @enabled: whether a custom SIGSEGV handler should be installed.
1188 * Applications might want to disable/enable the SIGSEGV handling of
1189 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1192 gst_segtrap_set_enabled (gboolean enabled)
1194 _gst_disable_segtrap = !enabled;