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 */
122 #define GST_CAT_DEFAULT GST_CAT_GST_INIT
124 #define MAX_PATH_SPLIT 16
125 #define GST_PLUGIN_SEPARATOR ","
127 static gboolean gst_initialized = FALSE;
128 static gboolean gst_deinitialized = FALSE;
131 HMODULE _priv_gst_dll_handle = NULL;
134 #ifndef GST_DISABLE_REGISTRY
135 GList *_priv_gst_plugin_paths = NULL; /* for delayed processing in post_init */
137 extern gboolean _priv_gst_disable_registry_update;
140 #ifndef GST_DISABLE_GST_DEBUG
141 extern const gchar *priv_gst_dump_dot_dir;
146 /* set to TRUE when segfaults need to be left as is */
147 static gboolean _gst_disable_segtrap = FALSE;
149 static gboolean init_pre (GOptionContext * context, GOptionGroup * group,
150 gpointer data, GError ** error);
151 static gboolean init_post (GOptionContext * context, GOptionGroup * group,
152 gpointer data, GError ** error);
153 #ifndef GST_DISABLE_OPTION_PARSING
154 static gboolean parse_goption_arg (const gchar * s_opt,
155 const gchar * arg, gpointer data, GError ** err);
158 GSList *_priv_gst_preload_plugins = NULL;
160 const gchar g_log_domain_gstreamer[] = "GStreamer";
163 debug_log_handler (const gchar * log_domain,
164 GLogLevelFlags log_level, const gchar * message, gpointer user_data)
166 g_log_default_handler (log_domain, log_level, message, user_data);
167 /* FIXME: do we still need this ? fatal errors these days are all
168 * other than core errors */
169 /* g_on_error_query (NULL); */
176 #ifndef GST_DISABLE_GST_DEBUG
187 ARG_REGISTRY_UPDATE_DISABLE,
188 ARG_REGISTRY_FORK_DISABLE
191 /* debug-spec ::= category-spec [, category-spec]*
192 * category-spec ::= category:val | val
201 #ifndef GST_DISABLE_GST_DEBUG
203 parse_debug_category (gchar * str, const gchar ** category)
220 parse_debug_level (gchar * str, gint * level)
228 if (str[0] != NUL && str[1] == NUL
229 && str[0] >= '0' && str[0] < '0' + GST_LEVEL_COUNT) {
230 *level = str[0] - '0';
238 parse_debug_list (const gchar * list)
243 g_return_if_fail (list != NULL);
245 split = g_strsplit (list, ",", 0);
247 for (walk = split; *walk; walk++) {
248 if (strchr (*walk, ':')) {
249 gchar **values = g_strsplit (*walk, ":", 2);
251 if (values[0] && values[1]) {
253 const gchar *category;
255 if (parse_debug_category (values[0], &category)
256 && parse_debug_level (values[1], &level))
257 gst_debug_set_threshold_for_name (category, level);
264 if (parse_debug_level (*walk, &level))
265 gst_debug_set_default_threshold (level);
275 DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
277 if (fdwReason == DLL_PROCESS_ATTACH)
278 _priv_gst_dll_handle = (HMODULE) hinstDLL;
285 * gst_init_get_option_group:
287 * Returns a #GOptionGroup with GStreamer's argument specifications. The
288 * group is set up to use standard GOption callbacks, so when using this
289 * group in combination with GOption parsing methods, all argument parsing
290 * and initialization is automated.
292 * This function is useful if you want to integrate GStreamer with other
293 * libraries that use GOption (see g_option_context_add_group() ).
295 * If you use this function, you should make sure you initialise the GLib
296 * threading system as one of the very first things in your program
297 * (see the example at the beginning of this section).
299 * Returns: a pointer to GStreamer's option group.
303 gst_init_get_option_group (void)
305 #ifndef GST_DISABLE_OPTION_PARSING
307 static const GOptionEntry gst_args[] = {
308 {"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
309 (gpointer) parse_goption_arg, N_("Print the GStreamer version"), NULL},
310 {"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
311 (gpointer) parse_goption_arg, N_("Make all warnings fatal"), NULL},
312 #ifndef GST_DISABLE_GST_DEBUG
313 {"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
314 (gpointer) parse_goption_arg,
315 N_("Print available debug categories and exit"),
317 {"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK,
318 (gpointer) parse_goption_arg,
319 N_("Default debug level from 1 (only error) to 5 (anything) or "
322 {"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) parse_goption_arg,
323 N_("Comma-separated list of category_name:level pairs to set "
324 "specific levels for the individual categories. Example: "
325 "GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
327 {"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
328 (gpointer) parse_goption_arg, N_("Disable colored debugging output"),
330 {"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
331 (gpointer) parse_goption_arg, N_("Disable debugging"), NULL},
333 {"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
334 (gpointer) parse_goption_arg,
335 N_("Enable verbose plugin loading diagnostics"),
337 {"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK,
338 (gpointer) parse_goption_arg,
339 N_("Colon-separated paths containing plugins"), N_("PATHS")},
340 {"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK,
341 (gpointer) parse_goption_arg,
342 N_("Comma-separated list of plugins to preload in addition to the "
343 "list stored in environment variable GST_PLUGIN_PATH"),
345 {"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
346 (gpointer) parse_goption_arg,
347 N_("Disable trapping of segmentation faults during plugin loading"),
349 {"gst-disable-registry-update", 0, G_OPTION_FLAG_NO_ARG,
350 G_OPTION_ARG_CALLBACK,
351 (gpointer) parse_goption_arg,
352 N_("Disable updating the registry"),
354 {"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
355 G_OPTION_ARG_CALLBACK,
356 (gpointer) parse_goption_arg,
357 N_("Disable spawning a helper process while scanning the registry"),
362 /* Since GLib 2.23.2 calling g_thread_init() 'late' is allowed and is
363 * automatically done as part of g_type_init() */
364 if (!glib_check_version (2, 23, 3)) {
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 GLIB_CHECK_VERSION (2,20,0)
371 if (!g_thread_get_initialized ()) {
373 if (!g_thread_supported ()) {
375 g_warning ("The GStreamer function gst_init_get_option_group() was\n"
376 "\tcalled, but the GLib threading system has not been initialised\n"
377 "\tyet, something that must happen before any other GLib function\n"
378 "\tis called. The application needs to be fixed so that it calls\n"
379 "\t if (!g_thread_get_initialized ()) g_thread_init(NULL);\n"
380 "\tas very first thing in its main() function. Please file a bug\n"
381 "\tagainst this application.");
382 g_thread_init (NULL);
388 group = g_option_group_new ("gst", _("GStreamer Options"),
389 _("Show GStreamer Options"), NULL, NULL);
390 g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
391 (GOptionParseFunc) init_post);
393 g_option_group_add_entries (group, gst_args);
394 g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
404 * @argc: (inout): pointer to application's argc
405 * @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
406 * @err: pointer to a #GError to which a message will be posted on error
408 * Initializes the GStreamer library, setting up internal path lists,
409 * registering built-in elements, and loading standard plugins.
411 * This function will return %FALSE if GStreamer could not be initialized
412 * for some reason. If you want your program to fail fatally,
413 * use gst_init() instead.
415 * This function should be called before calling any other GLib functions. If
416 * this is not an option, your program must initialise the GLib thread system
417 * using g_thread_init() before any other GLib functions are called.
419 * Returns: %TRUE if GStreamer could be initialized.
422 gst_init_check (int *argc, char **argv[], GError ** err)
424 #ifndef GST_DISABLE_OPTION_PARSING
430 #if GLIB_CHECK_VERSION (2,20,0)
431 if (!g_thread_get_initialized ())
433 if (!g_thread_supported ())
435 g_thread_init (NULL);
437 if (gst_initialized) {
438 GST_DEBUG ("already initialized gst");
441 #ifndef GST_DISABLE_OPTION_PARSING
442 ctx = g_option_context_new ("- GStreamer initialization");
443 g_option_context_set_ignore_unknown_options (ctx, TRUE);
444 group = gst_init_get_option_group ();
445 g_option_context_add_group (ctx, group);
446 res = g_option_context_parse (ctx, argc, argv, err);
447 g_option_context_free (ctx);
449 init_pre (NULL, NULL, NULL, NULL);
450 init_post (NULL, NULL, NULL, NULL);
454 gst_initialized = res;
457 GST_INFO ("initialized GStreamer successfully");
459 GST_INFO ("failed to initialize GStreamer");
467 * @argc: (inout): pointer to application's argc
468 * @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
470 * Initializes the GStreamer library, setting up internal path lists,
471 * registering built-in elements, and loading standard plugins.
473 * Unless the plugin registry is disabled at compile time, the registry will be
474 * loaded. By default this will also check if the registry cache needs to be
475 * updated and rescan all plugins if needed. See gst_update_registry() for
476 * details and section
477 * <link linkend="gst-running">Running GStreamer Applications</link>
478 * for how to disable automatic registry updates.
480 * This function should be called before calling any other GLib functions. If
481 * this is not an option, your program must initialise the GLib thread system
482 * using g_thread_init() before any other GLib functions are called.
485 * This function will terminate your program if it was unable to initialize
486 * GStreamer for some reason. If you want your program to fall back,
487 * use gst_init_check() instead.
490 * WARNING: This function does not work in the same way as corresponding
491 * functions in other glib-style libraries, such as gtk_init(). In
492 * particular, unknown command line options cause this function to
493 * abort program execution.
496 gst_init (int *argc, char **argv[])
500 if (!gst_init_check (argc, argv, &err)) {
501 g_print ("Could not initialize GStreamer: %s\n",
502 err ? err->message : "unknown error occurred");
510 #ifndef GST_DISABLE_REGISTRY
512 add_path_func (gpointer data, gpointer user_data)
514 GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
515 _priv_gst_plugin_paths =
516 g_list_append (_priv_gst_plugin_paths, g_strdup (data));
520 #ifndef GST_DISABLE_OPTION_PARSING
522 prepare_for_load_plugin_func (gpointer data, gpointer user_data)
524 _priv_gst_preload_plugins =
525 g_slist_prepend (_priv_gst_preload_plugins, g_strdup (data));
529 #ifndef GST_DISABLE_OPTION_PARSING
531 split_and_iterate (const gchar * stringlist, gchar * separator,
532 GFunc iterator, gpointer user_data)
536 gchar *lastlist = g_strdup (stringlist);
539 strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
544 iterator (strings[j], user_data);
545 if (++j == MAX_PATH_SPLIT) {
546 lastlist = g_strdup (strings[j]);
551 g_strfreev (strings);
556 /* we have no fail cases yet, but maybe in the future */
558 init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
561 if (gst_initialized) {
562 GST_DEBUG ("already initialized");
566 /* GStreamer was built against a GLib >= 2.8 and is therefore not doing
567 * the refcount hack. Check that it isn't being run against an older GLib */
568 if (glib_major_version < 2 ||
569 (glib_major_version == 2 && glib_minor_version < 8)) {
570 g_warning ("GStreamer was compiled against GLib %d.%d.%d but is running"
571 " against %d.%d.%d. This will cause reference counting issues",
572 GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION,
573 glib_major_version, glib_minor_version, glib_micro_version);
578 /* we need threading to be enabled right here */
579 #if GLIB_CHECK_VERSION (2,20,0)
580 g_assert (g_thread_get_initialized ());
582 g_assert (g_thread_supported ());
587 setlocale (LC_ALL, "");
588 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
589 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
590 #endif /* ENABLE_NLS */
592 #ifndef GST_DISABLE_GST_DEBUG
594 const gchar *debug_list;
596 if (g_getenv ("GST_DEBUG_NO_COLOR") != NULL)
597 gst_debug_set_colored (FALSE);
599 debug_list = g_getenv ("GST_DEBUG");
601 parse_debug_list (debug_list);
605 priv_gst_dump_dot_dir = g_getenv ("GST_DEBUG_DUMP_DOT_DIR");
607 /* This is the earliest we can make stuff show up in the logs.
608 * So give some useful info about GStreamer here */
609 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
610 GST_INFO ("Using library installed in %s", LIBDIR);
612 /* Print some basic system details if possible (OS/architecture) */
613 #ifdef HAVE_SYS_UTSNAME_H
615 struct utsname sys_details;
617 if (uname (&sys_details) == 0) {
618 GST_INFO ("%s %s %s %s %s", sys_details.sysname,
619 sys_details.nodename, sys_details.release, sys_details.version,
620 sys_details.machine);
629 gst_register_core_elements (GstPlugin * plugin)
631 /* register some standard builtin types */
632 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
634 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
637 g_assert_not_reached ();
644 * - initalization of threads if we use them
647 * - initializes gst_format
648 * - registers a bunch of types for gst_objects
650 * - we don't have cases yet where this fails, but in the future
651 * we might and then it's nice to be able to return that
654 init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
659 #ifndef GST_DISABLE_TRACE
661 #endif /* GST_DISABLE_TRACE */
663 if (gst_initialized) {
664 GST_DEBUG ("already initialized");
668 llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
669 g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
671 _priv_gst_quarks_initialize ();
672 _gst_format_initialize ();
673 _gst_query_initialize ();
674 g_type_class_ref (gst_object_get_type ());
675 g_type_class_ref (gst_pad_get_type ());
676 g_type_class_ref (gst_element_factory_get_type ());
677 g_type_class_ref (gst_element_get_type ());
678 g_type_class_ref (gst_type_find_factory_get_type ());
679 g_type_class_ref (gst_bin_get_type ());
680 g_type_class_ref (gst_bus_get_type ());
681 g_type_class_ref (gst_task_get_type ());
682 g_type_class_ref (gst_clock_get_type ());
684 g_type_class_ref (gst_index_factory_get_type ());
685 gst_uri_handler_get_type ();
687 g_type_class_ref (gst_object_flags_get_type ());
688 g_type_class_ref (gst_bin_flags_get_type ());
689 g_type_class_ref (gst_buffer_flag_get_type ());
690 g_type_class_ref (gst_buffer_copy_flags_get_type ());
691 g_type_class_ref (gst_buffer_list_item_get_type ());
692 g_type_class_ref (gst_bus_flags_get_type ());
693 g_type_class_ref (gst_bus_sync_reply_get_type ());
694 g_type_class_ref (gst_caps_flags_get_type ());
695 g_type_class_ref (gst_clock_return_get_type ());
696 g_type_class_ref (gst_clock_entry_type_get_type ());
697 g_type_class_ref (gst_clock_flags_get_type ());
698 g_type_class_ref (gst_clock_type_get_type ());
699 g_type_class_ref (gst_debug_graph_details_get_type ());
700 g_type_class_ref (gst_state_get_type ());
701 g_type_class_ref (gst_state_change_return_get_type ());
702 g_type_class_ref (gst_state_change_get_type ());
703 g_type_class_ref (gst_element_flags_get_type ());
704 g_type_class_ref (gst_core_error_get_type ());
705 g_type_class_ref (gst_library_error_get_type ());
706 g_type_class_ref (gst_resource_error_get_type ());
707 g_type_class_ref (gst_stream_error_get_type ());
708 g_type_class_ref (gst_event_type_flags_get_type ());
709 g_type_class_ref (gst_event_type_get_type ());
710 g_type_class_ref (gst_seek_type_get_type ());
711 g_type_class_ref (gst_seek_flags_get_type ());
712 g_type_class_ref (gst_format_get_type ());
713 g_type_class_ref (gst_index_certainty_get_type ());
714 g_type_class_ref (gst_index_entry_type_get_type ());
715 g_type_class_ref (gst_index_lookup_method_get_type ());
716 g_type_class_ref (gst_assoc_flags_get_type ());
717 g_type_class_ref (gst_index_resolver_method_get_type ());
718 g_type_class_ref (gst_index_flags_get_type ());
719 g_type_class_ref (gst_debug_level_get_type ());
720 g_type_class_ref (gst_debug_color_flags_get_type ());
721 g_type_class_ref (gst_iterator_result_get_type ());
722 g_type_class_ref (gst_iterator_item_get_type ());
723 g_type_class_ref (gst_message_type_get_type ());
724 g_type_class_ref (gst_mini_object_flags_get_type ());
725 g_type_class_ref (gst_pad_link_return_get_type ());
726 g_type_class_ref (gst_flow_return_get_type ());
727 g_type_class_ref (gst_activate_mode_get_type ());
728 g_type_class_ref (gst_pad_direction_get_type ());
729 g_type_class_ref (gst_pad_flags_get_type ());
730 g_type_class_ref (gst_pad_presence_get_type ());
731 g_type_class_ref (gst_pad_template_flags_get_type ());
732 g_type_class_ref (gst_pipeline_flags_get_type ());
733 g_type_class_ref (gst_plugin_error_get_type ());
734 g_type_class_ref (gst_plugin_flags_get_type ());
735 g_type_class_ref (gst_plugin_dependency_flags_get_type ());
736 g_type_class_ref (gst_rank_get_type ());
737 g_type_class_ref (gst_query_type_get_type ());
738 g_type_class_ref (gst_buffering_mode_get_type ());
739 g_type_class_ref (gst_stream_status_type_get_type ());
740 g_type_class_ref (gst_structure_change_type_get_type ());
741 g_type_class_ref (gst_tag_merge_mode_get_type ());
742 g_type_class_ref (gst_tag_flag_get_type ());
743 g_type_class_ref (gst_task_pool_get_type ());
744 g_type_class_ref (gst_task_state_get_type ());
745 g_type_class_ref (gst_alloc_trace_flags_get_type ());
746 g_type_class_ref (gst_type_find_probability_get_type ());
747 g_type_class_ref (gst_uri_type_get_type ());
748 g_type_class_ref (gst_parse_error_get_type ());
749 g_type_class_ref (gst_parse_flags_get_type ());
750 g_type_class_ref (gst_search_mode_get_type ());
752 gst_structure_get_type ();
753 _gst_value_initialize ();
754 g_type_class_ref (gst_param_spec_fraction_get_type ());
755 gst_caps_get_type ();
756 _gst_event_initialize ();
757 _gst_buffer_initialize ();
758 _gst_buffer_list_initialize ();
759 _gst_message_initialize ();
760 _gst_tag_initialize ();
762 _gst_plugin_initialize ();
764 gst_g_error_get_type ();
766 /* register core plugins */
767 gst_plugin_register_static (GST_VERSION_MAJOR, GST_VERSION_MINOR,
768 "staticelements", "core elements linked into the GStreamer library",
769 gst_register_core_elements, VERSION, GST_LICENSE, PACKAGE,
770 GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
773 * Any errors happening below this point are non-fatal, we therefore mark
774 * gstreamer as being initialized, since it is the case from a plugin point of
777 * If anything fails, it will be put back to FALSE in gst_init_check().
778 * This allows some special plugins that would call gst_init() to not cause a
779 * looping effect (i.e. initializing GStreamer twice).
781 gst_initialized = TRUE;
783 if (!gst_update_registry ())
786 #ifndef GST_DISABLE_TRACE
789 gst_trace = gst_trace_new ("gst.trace", 1024);
790 gst_trace_set_default (gst_trace);
792 #endif /* GST_DISABLE_TRACE */
794 GST_INFO ("GLib runtime version: %d.%d.%d\n", glib_major_version,
795 glib_minor_version, glib_micro_version);
796 GST_INFO ("GLib headers version: %d.%d.%d\n", GLIB_MAJOR_VERSION,
797 GLIB_MINOR_VERSION, GLIB_MICRO_VERSION);
802 #ifndef GST_DISABLE_GST_DEBUG
804 select_all (GstPlugin * plugin, gpointer user_data)
810 sort_by_category_name (gconstpointer a, gconstpointer b)
812 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
813 gst_debug_category_get_name ((GstDebugCategory *) b));
817 gst_debug_help (void)
822 /* Need to ensure the registry is loaded to get debug categories */
823 if (!init_post (NULL, NULL, NULL, NULL))
826 list2 = gst_registry_plugin_filter (gst_registry_get_default (),
827 select_all, FALSE, NULL);
829 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
830 for (g = list2; g; g = g_list_next (g)) {
831 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
833 gst_plugin_load (plugin);
837 list = gst_debug_get_all_categories ();
838 walk = list = g_slist_sort (list, sort_by_category_name);
841 g_print ("name level description\n");
842 g_print ("---------------------+--------+--------------------------------\n");
845 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
847 if (gst_debug_is_colored ()) {
849 gint color = gst_debug_construct_win_color (cat->color);
850 const gint clear = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
852 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
853 g_print ("%-20s", gst_debug_category_get_name (cat));
854 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
855 g_print (" %1d %s ", gst_debug_category_get_threshold (cat),
856 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)));
857 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
858 g_print ("%s", gst_debug_category_get_description (cat));
859 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
861 #else /* G_OS_WIN32 */
862 gchar *color = gst_debug_construct_term_color (cat->color);
864 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
866 gst_debug_category_get_name (cat),
867 gst_debug_category_get_threshold (cat),
868 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
869 color, gst_debug_category_get_description (cat));
871 #endif /* G_OS_WIN32 */
873 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
874 gst_debug_category_get_threshold (cat),
875 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
876 gst_debug_category_get_description (cat));
878 walk = g_slist_next (walk);
885 #ifndef GST_DISABLE_OPTION_PARSING
887 parse_one_option (gint opt, const gchar * arg, GError ** err)
891 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
893 case ARG_FATAL_WARNINGS:{
894 GLogLevelFlags fatal_mask;
896 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
897 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
898 g_log_set_always_fatal (fatal_mask);
901 #ifndef GST_DISABLE_GST_DEBUG
902 case ARG_DEBUG_LEVEL:{
905 tmp = strtol (arg, NULL, 0);
906 if (tmp >= 0 && tmp < GST_LEVEL_COUNT) {
907 gst_debug_set_default_threshold (tmp);
912 parse_debug_list (arg);
914 case ARG_DEBUG_NO_COLOR:
915 gst_debug_set_colored (FALSE);
917 case ARG_DEBUG_DISABLE:
918 gst_debug_set_active (FALSE);
924 case ARG_PLUGIN_SPEW:
926 case ARG_PLUGIN_PATH:
927 #ifndef GST_DISABLE_REGISTRY
928 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
929 #endif /* GST_DISABLE_REGISTRY */
931 case ARG_PLUGIN_LOAD:
932 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
934 case ARG_SEGTRAP_DISABLE:
935 _gst_disable_segtrap = TRUE;
937 case ARG_REGISTRY_UPDATE_DISABLE:
938 #ifndef GST_DISABLE_REGISTRY
939 _priv_gst_disable_registry_update = TRUE;
942 case ARG_REGISTRY_FORK_DISABLE:
943 gst_registry_fork_set_enabled (FALSE);
946 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
947 _("Unknown option"));
955 parse_goption_arg (const gchar * opt,
956 const gchar * arg, gpointer data, GError ** err)
964 "--gst-version", ARG_VERSION}, {
965 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
966 #ifndef GST_DISABLE_GST_DEBUG
968 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
969 "--gst-debug", ARG_DEBUG}, {
970 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
971 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
972 "--gst-debug-help", ARG_DEBUG_HELP},
975 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
976 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
977 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
978 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
979 "--gst-disable-registry-update", ARG_REGISTRY_UPDATE_DISABLE}, {
980 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
985 for (n = 0; options[n].opt; n++) {
986 if (!strcmp (opt, options[n].opt)) {
987 val = options[n].val;
992 return parse_one_option (val, arg, err);
999 * Clean up any resources created by GStreamer in gst_init().
1001 * It is normally not needed to call this function in a normal application
1002 * as the resources will automatically be freed when the program terminates.
1003 * This function is therefore mostly used by testsuites and other memory
1006 * After this call GStreamer (including this method) should not be used anymore.
1013 GST_INFO ("deinitializing GStreamer");
1015 if (gst_deinitialized) {
1016 GST_DEBUG ("already deinitialized");
1020 g_slist_foreach (_priv_gst_preload_plugins, (GFunc) g_free, NULL);
1021 g_slist_free (_priv_gst_preload_plugins);
1022 _priv_gst_preload_plugins = NULL;
1024 #ifndef GST_DISABLE_REGISTRY
1025 g_list_foreach (_priv_gst_plugin_paths, (GFunc) g_free, NULL);
1026 g_list_free (_priv_gst_plugin_paths);
1027 _priv_gst_plugin_paths = NULL;
1030 clock = gst_system_clock_obtain ();
1031 gst_object_unref (clock);
1032 gst_object_unref (clock);
1034 _priv_gst_registry_cleanup ();
1036 g_type_class_unref (g_type_class_peek (gst_object_get_type ()));
1037 g_type_class_unref (g_type_class_peek (gst_pad_get_type ()));
1038 g_type_class_unref (g_type_class_peek (gst_element_factory_get_type ()));
1039 g_type_class_unref (g_type_class_peek (gst_element_get_type ()));
1040 g_type_class_unref (g_type_class_peek (gst_type_find_factory_get_type ()));
1041 g_type_class_unref (g_type_class_peek (gst_bin_get_type ()));
1042 g_type_class_unref (g_type_class_peek (gst_bus_get_type ()));
1043 g_type_class_unref (g_type_class_peek (gst_task_get_type ()));
1044 g_type_class_unref (g_type_class_peek (gst_index_factory_get_type ()));
1045 g_type_class_unref (g_type_class_peek (gst_object_flags_get_type ()));
1046 g_type_class_unref (g_type_class_peek (gst_bin_flags_get_type ()));
1047 g_type_class_unref (g_type_class_peek (gst_buffer_flag_get_type ()));
1048 g_type_class_unref (g_type_class_peek (gst_buffer_copy_flags_get_type ()));
1049 g_type_class_unref (g_type_class_peek (gst_buffer_list_item_get_type ()));
1050 g_type_class_unref (g_type_class_peek (gst_bus_flags_get_type ()));
1051 g_type_class_unref (g_type_class_peek (gst_bus_sync_reply_get_type ()));
1052 g_type_class_unref (g_type_class_peek (gst_caps_flags_get_type ()));
1053 g_type_class_unref (g_type_class_peek (gst_clock_type_get_type ()));
1054 g_type_class_unref (g_type_class_peek (gst_clock_return_get_type ()));
1055 g_type_class_unref (g_type_class_peek (gst_clock_entry_type_get_type ()));
1056 g_type_class_unref (g_type_class_peek (gst_clock_flags_get_type ()));
1057 g_type_class_unref (g_type_class_peek (gst_debug_graph_details_get_type ()));
1058 g_type_class_unref (g_type_class_peek (gst_state_get_type ()));
1059 g_type_class_unref (g_type_class_peek (gst_state_change_return_get_type ()));
1060 g_type_class_unref (g_type_class_peek (gst_state_change_get_type ()));
1061 g_type_class_unref (g_type_class_peek (gst_element_flags_get_type ()));
1062 g_type_class_unref (g_type_class_peek (gst_core_error_get_type ()));
1063 g_type_class_unref (g_type_class_peek (gst_library_error_get_type ()));
1064 g_type_class_unref (g_type_class_peek (gst_plugin_dependency_flags_get_type
1066 g_type_class_unref (g_type_class_peek (gst_parse_flags_get_type ()));
1067 g_type_class_unref (g_type_class_peek (gst_resource_error_get_type ()));
1068 g_type_class_unref (g_type_class_peek (gst_search_mode_get_type ()));
1069 g_type_class_unref (g_type_class_peek (gst_stream_error_get_type ()));
1070 g_type_class_unref (g_type_class_peek (gst_stream_status_type_get_type ()));
1071 g_type_class_unref (g_type_class_peek (gst_structure_change_type_get_type
1073 g_type_class_unref (g_type_class_peek (gst_event_type_flags_get_type ()));
1074 g_type_class_unref (g_type_class_peek (gst_event_type_get_type ()));
1075 g_type_class_unref (g_type_class_peek (gst_seek_type_get_type ()));
1076 g_type_class_unref (g_type_class_peek (gst_seek_flags_get_type ()));
1077 g_type_class_unref (g_type_class_peek (gst_format_get_type ()));
1078 g_type_class_unref (g_type_class_peek (gst_index_certainty_get_type ()));
1079 g_type_class_unref (g_type_class_peek (gst_index_entry_type_get_type ()));
1080 g_type_class_unref (g_type_class_peek (gst_index_lookup_method_get_type ()));
1081 g_type_class_unref (g_type_class_peek (gst_assoc_flags_get_type ()));
1082 g_type_class_unref (g_type_class_peek (gst_index_resolver_method_get_type
1084 g_type_class_unref (g_type_class_peek (gst_index_flags_get_type ()));
1085 g_type_class_unref (g_type_class_peek (gst_debug_level_get_type ()));
1086 g_type_class_unref (g_type_class_peek (gst_debug_color_flags_get_type ()));
1087 g_type_class_unref (g_type_class_peek (gst_iterator_result_get_type ()));
1088 g_type_class_unref (g_type_class_peek (gst_iterator_item_get_type ()));
1089 g_type_class_unref (g_type_class_peek (gst_message_type_get_type ()));
1090 g_type_class_unref (g_type_class_peek (gst_mini_object_flags_get_type ()));
1091 g_type_class_unref (g_type_class_peek (gst_pad_link_return_get_type ()));
1092 g_type_class_unref (g_type_class_peek (gst_flow_return_get_type ()));
1093 g_type_class_unref (g_type_class_peek (gst_activate_mode_get_type ()));
1094 g_type_class_unref (g_type_class_peek (gst_pad_direction_get_type ()));
1095 g_type_class_unref (g_type_class_peek (gst_pad_flags_get_type ()));
1096 g_type_class_unref (g_type_class_peek (gst_pad_presence_get_type ()));
1097 g_type_class_unref (g_type_class_peek (gst_pad_template_flags_get_type ()));
1098 g_type_class_unref (g_type_class_peek (gst_pipeline_flags_get_type ()));
1099 g_type_class_unref (g_type_class_peek (gst_plugin_error_get_type ()));
1100 g_type_class_unref (g_type_class_peek (gst_plugin_flags_get_type ()));
1101 g_type_class_unref (g_type_class_peek (gst_rank_get_type ()));
1102 g_type_class_unref (g_type_class_peek (gst_query_type_get_type ()));
1103 g_type_class_unref (g_type_class_peek (gst_buffering_mode_get_type ()));
1104 g_type_class_unref (g_type_class_peek (gst_tag_merge_mode_get_type ()));
1105 g_type_class_unref (g_type_class_peek (gst_tag_flag_get_type ()));
1106 g_type_class_unref (g_type_class_peek (gst_task_state_get_type ()));
1107 g_type_class_unref (g_type_class_peek (gst_alloc_trace_flags_get_type ()));
1108 g_type_class_unref (g_type_class_peek (gst_type_find_probability_get_type
1110 g_type_class_unref (g_type_class_peek (gst_uri_type_get_type ()));
1111 g_type_class_unref (g_type_class_peek (gst_parse_error_get_type ()));
1112 g_type_class_unref (g_type_class_peek (gst_param_spec_fraction_get_type ()));
1114 gst_deinitialized = TRUE;
1115 GST_INFO ("deinitialized GStreamer");
1120 * @major: pointer to a guint to store the major version number
1121 * @minor: pointer to a guint to store the minor version number
1122 * @micro: pointer to a guint to store the micro version number
1123 * @nano: pointer to a guint to store the nano version number
1125 * Gets the version number of the GStreamer library.
1128 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1130 g_return_if_fail (major);
1131 g_return_if_fail (minor);
1132 g_return_if_fail (micro);
1133 g_return_if_fail (nano);
1135 *major = GST_VERSION_MAJOR;
1136 *minor = GST_VERSION_MINOR;
1137 *micro = GST_VERSION_MICRO;
1138 *nano = GST_VERSION_NANO;
1142 * gst_version_string:
1144 * This function returns a string that is useful for describing this version
1145 * of GStreamer to the outside world: user agent strings, logging, ...
1147 * Returns: a newly allocated string describing this version of GStreamer.
1151 gst_version_string (void)
1153 guint major, minor, micro, nano;
1155 gst_version (&major, &minor, µ, &nano);
1157 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1159 return g_strdup_printf ("GStreamer %d.%d.%d (GIT)", major, minor, micro);
1161 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1166 * gst_segtrap_is_enabled:
1168 * Some functions in the GStreamer core might install a custom SIGSEGV handler
1169 * to better catch and report errors to the application. Currently this feature
1170 * is enabled by default when loading plugins.
1172 * Applications might want to disable this behaviour with the
1173 * gst_segtrap_set_enabled() function. This is typically done if the application
1174 * wants to install its own handler without GStreamer interfering.
1176 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1181 gst_segtrap_is_enabled (void)
1183 /* yeps, it's enabled when it's not disabled */
1184 return !_gst_disable_segtrap;
1188 * gst_segtrap_set_enabled:
1189 * @enabled: whether a custom SIGSEGV handler should be installed.
1191 * Applications might want to disable/enable the SIGSEGV handling of
1192 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1197 gst_segtrap_set_enabled (gboolean enabled)
1199 _gst_disable_segtrap = !enabled;