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 /* The GLib threading system must be initialised before calling any other
363 * GLib function according to the documentation; if the application hasn't
364 * called gst_init() yet or initialised the threading system otherwise, we
365 * better issue a warning here (since chances are high that the application
366 * has already called other GLib functions such as g_option_context_new() */
367 #if GLIB_CHECK_VERSION (2,20,0)
368 if (!g_thread_get_initialized ()) {
370 if (!g_thread_supported ()) {
372 g_warning ("The GStreamer function gst_init_get_option_group() was\n"
373 "\tcalled, but the GLib threading system has not been initialised\n"
374 "\tyet, something that must happen before any other GLib function\n"
375 "\tis called. The application needs to be fixed so that it calls\n"
376 "\t if (!g_thread_supported ()) g_thread_init(NULL);\n"
377 "\tas very first thing in its main() function. Please file a bug\n"
378 "\tagainst this application.");
379 g_thread_init (NULL);
382 group = g_option_group_new ("gst", _("GStreamer Options"),
383 _("Show GStreamer Options"), NULL, NULL);
384 g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
385 (GOptionParseFunc) init_post);
387 g_option_group_add_entries (group, gst_args);
388 g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
398 * @argc: (inout): pointer to application's argc
399 * @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
400 * @err: pointer to a #GError to which a message will be posted on error
402 * Initializes the GStreamer library, setting up internal path lists,
403 * registering built-in elements, and loading standard plugins.
405 * This function will return %FALSE if GStreamer could not be initialized
406 * for some reason. If you want your program to fail fatally,
407 * use gst_init() instead.
409 * This function should be called before calling any other GLib functions. If
410 * this is not an option, your program must initialise the GLib thread system
411 * using g_thread_init() before any other GLib functions are called.
413 * Returns: %TRUE if GStreamer could be initialized.
416 gst_init_check (int *argc, char **argv[], GError ** err)
418 #ifndef GST_DISABLE_OPTION_PARSING
424 #if GLIB_CHECK_VERSION (2,20,0)
425 if (!g_thread_get_initialized ())
427 if (!g_thread_supported ())
429 g_thread_init (NULL);
431 if (gst_initialized) {
432 GST_DEBUG ("already initialized gst");
435 #ifndef GST_DISABLE_OPTION_PARSING
436 ctx = g_option_context_new ("- GStreamer initialization");
437 g_option_context_set_ignore_unknown_options (ctx, TRUE);
438 group = gst_init_get_option_group ();
439 g_option_context_add_group (ctx, group);
440 res = g_option_context_parse (ctx, argc, argv, err);
441 g_option_context_free (ctx);
443 init_pre (NULL, NULL, NULL, NULL);
444 init_post (NULL, NULL, NULL, NULL);
448 gst_initialized = res;
451 GST_INFO ("initialized GStreamer successfully");
453 GST_INFO ("failed to initialize GStreamer");
461 * @argc: (inout): pointer to application's argc
462 * @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
464 * Initializes the GStreamer library, setting up internal path lists,
465 * registering built-in elements, and loading standard plugins.
467 * Unless the plugin registry is disabled at compile time, the registry will be
468 * loaded. By default this will also check if the registry cache needs to be
469 * updated and rescan all plugins if needed. See gst_update_registry() for
470 * details and section
471 * <link linkend="gst-running">Running GStreamer Applications</link>
472 * for how to disable automatic registry updates.
474 * This function should be called before calling any other GLib functions. If
475 * this is not an option, your program must initialise the GLib thread system
476 * using g_thread_init() before any other GLib functions are called.
479 * This function will terminate your program if it was unable to initialize
480 * GStreamer for some reason. If you want your program to fall back,
481 * use gst_init_check() instead.
484 * WARNING: This function does not work in the same way as corresponding
485 * functions in other glib-style libraries, such as gtk_init(). In
486 * particular, unknown command line options cause this function to
487 * abort program execution.
490 gst_init (int *argc, char **argv[])
494 if (!gst_init_check (argc, argv, &err)) {
495 g_print ("Could not initialize GStreamer: %s\n",
496 err ? err->message : "unknown error occurred");
504 #ifndef GST_DISABLE_REGISTRY
506 add_path_func (gpointer data, gpointer user_data)
508 GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
509 _priv_gst_plugin_paths =
510 g_list_append (_priv_gst_plugin_paths, g_strdup (data));
514 #ifndef GST_DISABLE_OPTION_PARSING
516 prepare_for_load_plugin_func (gpointer data, gpointer user_data)
518 _priv_gst_preload_plugins =
519 g_slist_prepend (_priv_gst_preload_plugins, g_strdup (data));
523 #ifndef GST_DISABLE_OPTION_PARSING
525 split_and_iterate (const gchar * stringlist, gchar * separator,
526 GFunc iterator, gpointer user_data)
530 gchar *lastlist = g_strdup (stringlist);
533 strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
538 iterator (strings[j], user_data);
539 if (++j == MAX_PATH_SPLIT) {
540 lastlist = g_strdup (strings[j]);
545 g_strfreev (strings);
550 /* we have no fail cases yet, but maybe in the future */
552 init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
555 if (gst_initialized) {
556 GST_DEBUG ("already initialized");
560 /* GStreamer was built against a GLib >= 2.8 and is therefore not doing
561 * the refcount hack. Check that it isn't being run against an older GLib */
562 if (glib_major_version < 2 ||
563 (glib_major_version == 2 && glib_minor_version < 8)) {
564 g_warning ("GStreamer was compiled against GLib %d.%d.%d but is running"
565 " against %d.%d.%d. This will cause reference counting issues",
566 GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION,
567 glib_major_version, glib_minor_version, glib_micro_version);
572 /* we need threading to be enabled right here */
573 #if GLIB_CHECK_VERSION (2,20,0)
574 g_assert (g_thread_get_initialized ());
576 g_assert (g_thread_supported ());
581 setlocale (LC_ALL, "");
582 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
583 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
584 #endif /* ENABLE_NLS */
586 #ifndef GST_DISABLE_GST_DEBUG
588 const gchar *debug_list;
590 if (g_getenv ("GST_DEBUG_NO_COLOR") != NULL)
591 gst_debug_set_colored (FALSE);
593 debug_list = g_getenv ("GST_DEBUG");
595 parse_debug_list (debug_list);
599 priv_gst_dump_dot_dir = g_getenv ("GST_DEBUG_DUMP_DOT_DIR");
601 /* This is the earliest we can make stuff show up in the logs.
602 * So give some useful info about GStreamer here */
603 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
604 GST_INFO ("Using library installed in %s", LIBDIR);
606 /* Print some basic system details if possible (OS/architecture) */
607 #ifdef HAVE_SYS_UTSNAME_H
609 struct utsname sys_details;
611 if (uname (&sys_details) == 0) {
612 GST_INFO ("%s %s %s %s %s", sys_details.sysname,
613 sys_details.nodename, sys_details.release, sys_details.version,
614 sys_details.machine);
623 gst_register_core_elements (GstPlugin * plugin)
625 /* register some standard builtin types */
626 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
628 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
631 g_assert_not_reached ();
638 * - initalization of threads if we use them
641 * - initializes gst_format
642 * - registers a bunch of types for gst_objects
644 * - we don't have cases yet where this fails, but in the future
645 * we might and then it's nice to be able to return that
648 init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
653 #ifndef GST_DISABLE_TRACE
655 #endif /* GST_DISABLE_TRACE */
657 if (gst_initialized) {
658 GST_DEBUG ("already initialized");
662 llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
663 g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
665 _priv_gst_quarks_initialize ();
666 _gst_format_initialize ();
667 _gst_query_initialize ();
668 g_type_class_ref (gst_object_get_type ());
669 g_type_class_ref (gst_pad_get_type ());
670 g_type_class_ref (gst_element_factory_get_type ());
671 g_type_class_ref (gst_element_get_type ());
672 g_type_class_ref (gst_type_find_factory_get_type ());
673 g_type_class_ref (gst_bin_get_type ());
674 g_type_class_ref (gst_bus_get_type ());
675 g_type_class_ref (gst_task_get_type ());
676 g_type_class_ref (gst_clock_get_type ());
678 g_type_class_ref (gst_index_factory_get_type ());
679 gst_uri_handler_get_type ();
681 g_type_class_ref (gst_object_flags_get_type ());
682 g_type_class_ref (gst_bin_flags_get_type ());
683 g_type_class_ref (gst_buffer_flag_get_type ());
684 g_type_class_ref (gst_buffer_copy_flags_get_type ());
685 g_type_class_ref (gst_buffer_list_item_get_type ());
686 g_type_class_ref (gst_bus_flags_get_type ());
687 g_type_class_ref (gst_bus_sync_reply_get_type ());
688 g_type_class_ref (gst_caps_flags_get_type ());
689 g_type_class_ref (gst_clock_return_get_type ());
690 g_type_class_ref (gst_clock_entry_type_get_type ());
691 g_type_class_ref (gst_clock_flags_get_type ());
692 g_type_class_ref (gst_clock_type_get_type ());
693 g_type_class_ref (gst_debug_graph_details_get_type ());
694 g_type_class_ref (gst_state_get_type ());
695 g_type_class_ref (gst_state_change_return_get_type ());
696 g_type_class_ref (gst_state_change_get_type ());
697 g_type_class_ref (gst_element_flags_get_type ());
698 g_type_class_ref (gst_core_error_get_type ());
699 g_type_class_ref (gst_library_error_get_type ());
700 g_type_class_ref (gst_resource_error_get_type ());
701 g_type_class_ref (gst_stream_error_get_type ());
702 g_type_class_ref (gst_event_type_flags_get_type ());
703 g_type_class_ref (gst_event_type_get_type ());
704 g_type_class_ref (gst_seek_type_get_type ());
705 g_type_class_ref (gst_seek_flags_get_type ());
706 g_type_class_ref (gst_format_get_type ());
707 g_type_class_ref (gst_index_certainty_get_type ());
708 g_type_class_ref (gst_index_entry_type_get_type ());
709 g_type_class_ref (gst_index_lookup_method_get_type ());
710 g_type_class_ref (gst_assoc_flags_get_type ());
711 g_type_class_ref (gst_index_resolver_method_get_type ());
712 g_type_class_ref (gst_index_flags_get_type ());
713 g_type_class_ref (gst_debug_level_get_type ());
714 g_type_class_ref (gst_debug_color_flags_get_type ());
715 g_type_class_ref (gst_iterator_result_get_type ());
716 g_type_class_ref (gst_iterator_item_get_type ());
717 g_type_class_ref (gst_message_type_get_type ());
718 g_type_class_ref (gst_mini_object_flags_get_type ());
719 g_type_class_ref (gst_pad_link_return_get_type ());
720 g_type_class_ref (gst_flow_return_get_type ());
721 g_type_class_ref (gst_activate_mode_get_type ());
722 g_type_class_ref (gst_pad_direction_get_type ());
723 g_type_class_ref (gst_pad_flags_get_type ());
724 g_type_class_ref (gst_pad_presence_get_type ());
725 g_type_class_ref (gst_pad_template_flags_get_type ());
726 g_type_class_ref (gst_pipeline_flags_get_type ());
727 g_type_class_ref (gst_plugin_error_get_type ());
728 g_type_class_ref (gst_plugin_flags_get_type ());
729 g_type_class_ref (gst_plugin_dependency_flags_get_type ());
730 g_type_class_ref (gst_rank_get_type ());
731 g_type_class_ref (gst_query_type_get_type ());
732 g_type_class_ref (gst_buffering_mode_get_type ());
733 g_type_class_ref (gst_stream_status_type_get_type ());
734 g_type_class_ref (gst_structure_change_type_get_type ());
735 g_type_class_ref (gst_tag_merge_mode_get_type ());
736 g_type_class_ref (gst_tag_flag_get_type ());
737 g_type_class_ref (gst_task_pool_get_type ());
738 g_type_class_ref (gst_task_state_get_type ());
739 g_type_class_ref (gst_alloc_trace_flags_get_type ());
740 g_type_class_ref (gst_type_find_probability_get_type ());
741 g_type_class_ref (gst_uri_type_get_type ());
742 g_type_class_ref (gst_parse_error_get_type ());
743 g_type_class_ref (gst_parse_flags_get_type ());
744 g_type_class_ref (gst_search_mode_get_type ());
746 gst_structure_get_type ();
747 _gst_value_initialize ();
748 g_type_class_ref (gst_param_spec_fraction_get_type ());
749 gst_caps_get_type ();
750 _gst_event_initialize ();
751 _gst_buffer_initialize ();
752 _gst_buffer_list_initialize ();
753 _gst_message_initialize ();
754 _gst_tag_initialize ();
756 _gst_plugin_initialize ();
758 gst_g_error_get_type ();
760 /* register core plugins */
761 gst_plugin_register_static (GST_VERSION_MAJOR, GST_VERSION_MINOR,
762 "staticelements", "core elements linked into the GStreamer library",
763 gst_register_core_elements, VERSION, GST_LICENSE, PACKAGE,
764 GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
767 * Any errors happening below this point are non-fatal, we therefore mark
768 * gstreamer as being initialized, since it is the case from a plugin point of
771 * If anything fails, it will be put back to FALSE in gst_init_check().
772 * This allows some special plugins that would call gst_init() to not cause a
773 * looping effect (i.e. initializing GStreamer twice).
775 gst_initialized = TRUE;
777 if (!gst_update_registry ())
780 #ifndef GST_DISABLE_TRACE
783 gst_trace = gst_trace_new ("gst.trace", 1024);
784 gst_trace_set_default (gst_trace);
786 #endif /* GST_DISABLE_TRACE */
791 #ifndef GST_DISABLE_GST_DEBUG
793 select_all (GstPlugin * plugin, gpointer user_data)
799 sort_by_category_name (gconstpointer a, gconstpointer b)
801 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
802 gst_debug_category_get_name ((GstDebugCategory *) b));
806 gst_debug_help (void)
811 /* Need to ensure the registry is loaded to get debug categories */
812 if (!init_post (NULL, NULL, NULL, NULL))
815 list2 = gst_registry_plugin_filter (gst_registry_get_default (),
816 select_all, FALSE, NULL);
818 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
819 for (g = list2; g; g = g_list_next (g)) {
820 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
822 gst_plugin_load (plugin);
826 list = gst_debug_get_all_categories ();
827 walk = list = g_slist_sort (list, sort_by_category_name);
830 g_print ("name level description\n");
831 g_print ("---------------------+--------+--------------------------------\n");
834 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
836 if (gst_debug_is_colored ()) {
838 gint color = gst_debug_construct_win_color (cat->color);
839 const gint clear = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
841 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
842 g_print ("%-20s", gst_debug_category_get_name (cat));
843 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
844 g_print (" %1d %s ", gst_debug_category_get_threshold (cat),
845 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)));
846 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
847 g_print ("%s", gst_debug_category_get_description (cat));
848 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
850 #else /* G_OS_WIN32 */
851 gchar *color = gst_debug_construct_term_color (cat->color);
853 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
855 gst_debug_category_get_name (cat),
856 gst_debug_category_get_threshold (cat),
857 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
858 color, gst_debug_category_get_description (cat));
860 #endif /* G_OS_WIN32 */
862 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
863 gst_debug_category_get_threshold (cat),
864 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
865 gst_debug_category_get_description (cat));
867 walk = g_slist_next (walk);
874 #ifndef GST_DISABLE_OPTION_PARSING
876 parse_one_option (gint opt, const gchar * arg, GError ** err)
880 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
882 case ARG_FATAL_WARNINGS:{
883 GLogLevelFlags fatal_mask;
885 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
886 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
887 g_log_set_always_fatal (fatal_mask);
890 #ifndef GST_DISABLE_GST_DEBUG
891 case ARG_DEBUG_LEVEL:{
894 tmp = strtol (arg, NULL, 0);
895 if (tmp >= 0 && tmp < GST_LEVEL_COUNT) {
896 gst_debug_set_default_threshold (tmp);
901 parse_debug_list (arg);
903 case ARG_DEBUG_NO_COLOR:
904 gst_debug_set_colored (FALSE);
906 case ARG_DEBUG_DISABLE:
907 gst_debug_set_active (FALSE);
913 case ARG_PLUGIN_SPEW:
915 case ARG_PLUGIN_PATH:
916 #ifndef GST_DISABLE_REGISTRY
917 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
918 #endif /* GST_DISABLE_REGISTRY */
920 case ARG_PLUGIN_LOAD:
921 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
923 case ARG_SEGTRAP_DISABLE:
924 _gst_disable_segtrap = TRUE;
926 case ARG_REGISTRY_UPDATE_DISABLE:
927 #ifndef GST_DISABLE_REGISTRY
928 _priv_gst_disable_registry_update = TRUE;
931 case ARG_REGISTRY_FORK_DISABLE:
932 gst_registry_fork_set_enabled (FALSE);
935 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
936 _("Unknown option"));
944 parse_goption_arg (const gchar * opt,
945 const gchar * arg, gpointer data, GError ** err)
953 "--gst-version", ARG_VERSION}, {
954 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
955 #ifndef GST_DISABLE_GST_DEBUG
957 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
958 "--gst-debug", ARG_DEBUG}, {
959 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
960 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
961 "--gst-debug-help", ARG_DEBUG_HELP},
964 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
965 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
966 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
967 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
968 "--gst-disable-registry-update", ARG_REGISTRY_UPDATE_DISABLE}, {
969 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
974 for (n = 0; options[n].opt; n++) {
975 if (!strcmp (opt, options[n].opt)) {
976 val = options[n].val;
981 return parse_one_option (val, arg, err);
988 * Clean up any resources created by GStreamer in gst_init().
990 * It is normally not needed to call this function in a normal application
991 * as the resources will automatically be freed when the program terminates.
992 * This function is therefore mostly used by testsuites and other memory
995 * After this call GStreamer (including this method) should not be used anymore.
1002 GST_INFO ("deinitializing GStreamer");
1004 if (gst_deinitialized) {
1005 GST_DEBUG ("already deinitialized");
1009 g_slist_foreach (_priv_gst_preload_plugins, (GFunc) g_free, NULL);
1010 g_slist_free (_priv_gst_preload_plugins);
1011 _priv_gst_preload_plugins = NULL;
1013 #ifndef GST_DISABLE_REGISTRY
1014 g_list_foreach (_priv_gst_plugin_paths, (GFunc) g_free, NULL);
1015 g_list_free (_priv_gst_plugin_paths);
1016 _priv_gst_plugin_paths = NULL;
1019 clock = gst_system_clock_obtain ();
1020 gst_object_unref (clock);
1021 gst_object_unref (clock);
1023 _priv_gst_registry_cleanup ();
1025 g_type_class_unref (g_type_class_peek (gst_object_get_type ()));
1026 g_type_class_unref (g_type_class_peek (gst_pad_get_type ()));
1027 g_type_class_unref (g_type_class_peek (gst_element_factory_get_type ()));
1028 g_type_class_unref (g_type_class_peek (gst_element_get_type ()));
1029 g_type_class_unref (g_type_class_peek (gst_type_find_factory_get_type ()));
1030 g_type_class_unref (g_type_class_peek (gst_bin_get_type ()));
1031 g_type_class_unref (g_type_class_peek (gst_bus_get_type ()));
1032 g_type_class_unref (g_type_class_peek (gst_task_get_type ()));
1033 g_type_class_unref (g_type_class_peek (gst_index_factory_get_type ()));
1034 g_type_class_unref (g_type_class_peek (gst_object_flags_get_type ()));
1035 g_type_class_unref (g_type_class_peek (gst_bin_flags_get_type ()));
1036 g_type_class_unref (g_type_class_peek (gst_buffer_flag_get_type ()));
1037 g_type_class_unref (g_type_class_peek (gst_buffer_copy_flags_get_type ()));
1038 g_type_class_unref (g_type_class_peek (gst_buffer_list_item_get_type ()));
1039 g_type_class_unref (g_type_class_peek (gst_bus_flags_get_type ()));
1040 g_type_class_unref (g_type_class_peek (gst_bus_sync_reply_get_type ()));
1041 g_type_class_unref (g_type_class_peek (gst_caps_flags_get_type ()));
1042 g_type_class_unref (g_type_class_peek (gst_clock_type_get_type ()));
1043 g_type_class_unref (g_type_class_peek (gst_clock_return_get_type ()));
1044 g_type_class_unref (g_type_class_peek (gst_clock_entry_type_get_type ()));
1045 g_type_class_unref (g_type_class_peek (gst_clock_flags_get_type ()));
1046 g_type_class_unref (g_type_class_peek (gst_debug_graph_details_get_type ()));
1047 g_type_class_unref (g_type_class_peek (gst_state_get_type ()));
1048 g_type_class_unref (g_type_class_peek (gst_state_change_return_get_type ()));
1049 g_type_class_unref (g_type_class_peek (gst_state_change_get_type ()));
1050 g_type_class_unref (g_type_class_peek (gst_element_flags_get_type ()));
1051 g_type_class_unref (g_type_class_peek (gst_core_error_get_type ()));
1052 g_type_class_unref (g_type_class_peek (gst_library_error_get_type ()));
1053 g_type_class_unref (g_type_class_peek (gst_plugin_dependency_flags_get_type
1055 g_type_class_unref (g_type_class_peek (gst_parse_flags_get_type ()));
1056 g_type_class_unref (g_type_class_peek (gst_resource_error_get_type ()));
1057 g_type_class_unref (g_type_class_peek (gst_search_mode_get_type ()));
1058 g_type_class_unref (g_type_class_peek (gst_stream_error_get_type ()));
1059 g_type_class_unref (g_type_class_peek (gst_stream_status_type_get_type ()));
1060 g_type_class_unref (g_type_class_peek (gst_structure_change_type_get_type
1062 g_type_class_unref (g_type_class_peek (gst_event_type_flags_get_type ()));
1063 g_type_class_unref (g_type_class_peek (gst_event_type_get_type ()));
1064 g_type_class_unref (g_type_class_peek (gst_seek_type_get_type ()));
1065 g_type_class_unref (g_type_class_peek (gst_seek_flags_get_type ()));
1066 g_type_class_unref (g_type_class_peek (gst_format_get_type ()));
1067 g_type_class_unref (g_type_class_peek (gst_index_certainty_get_type ()));
1068 g_type_class_unref (g_type_class_peek (gst_index_entry_type_get_type ()));
1069 g_type_class_unref (g_type_class_peek (gst_index_lookup_method_get_type ()));
1070 g_type_class_unref (g_type_class_peek (gst_assoc_flags_get_type ()));
1071 g_type_class_unref (g_type_class_peek (gst_index_resolver_method_get_type
1073 g_type_class_unref (g_type_class_peek (gst_index_flags_get_type ()));
1074 g_type_class_unref (g_type_class_peek (gst_debug_level_get_type ()));
1075 g_type_class_unref (g_type_class_peek (gst_debug_color_flags_get_type ()));
1076 g_type_class_unref (g_type_class_peek (gst_iterator_result_get_type ()));
1077 g_type_class_unref (g_type_class_peek (gst_iterator_item_get_type ()));
1078 g_type_class_unref (g_type_class_peek (gst_message_type_get_type ()));
1079 g_type_class_unref (g_type_class_peek (gst_mini_object_flags_get_type ()));
1080 g_type_class_unref (g_type_class_peek (gst_pad_link_return_get_type ()));
1081 g_type_class_unref (g_type_class_peek (gst_flow_return_get_type ()));
1082 g_type_class_unref (g_type_class_peek (gst_activate_mode_get_type ()));
1083 g_type_class_unref (g_type_class_peek (gst_pad_direction_get_type ()));
1084 g_type_class_unref (g_type_class_peek (gst_pad_flags_get_type ()));
1085 g_type_class_unref (g_type_class_peek (gst_pad_presence_get_type ()));
1086 g_type_class_unref (g_type_class_peek (gst_pad_template_flags_get_type ()));
1087 g_type_class_unref (g_type_class_peek (gst_pipeline_flags_get_type ()));
1088 g_type_class_unref (g_type_class_peek (gst_plugin_error_get_type ()));
1089 g_type_class_unref (g_type_class_peek (gst_plugin_flags_get_type ()));
1090 g_type_class_unref (g_type_class_peek (gst_rank_get_type ()));
1091 g_type_class_unref (g_type_class_peek (gst_query_type_get_type ()));
1092 g_type_class_unref (g_type_class_peek (gst_buffering_mode_get_type ()));
1093 g_type_class_unref (g_type_class_peek (gst_tag_merge_mode_get_type ()));
1094 g_type_class_unref (g_type_class_peek (gst_tag_flag_get_type ()));
1095 g_type_class_unref (g_type_class_peek (gst_task_state_get_type ()));
1096 g_type_class_unref (g_type_class_peek (gst_alloc_trace_flags_get_type ()));
1097 g_type_class_unref (g_type_class_peek (gst_type_find_probability_get_type
1099 g_type_class_unref (g_type_class_peek (gst_uri_type_get_type ()));
1100 g_type_class_unref (g_type_class_peek (gst_parse_error_get_type ()));
1101 g_type_class_unref (g_type_class_peek (gst_param_spec_fraction_get_type ()));
1103 gst_deinitialized = TRUE;
1104 GST_INFO ("deinitialized GStreamer");
1109 * @major: pointer to a guint to store the major version number
1110 * @minor: pointer to a guint to store the minor version number
1111 * @micro: pointer to a guint to store the micro version number
1112 * @nano: pointer to a guint to store the nano version number
1114 * Gets the version number of the GStreamer library.
1117 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1119 g_return_if_fail (major);
1120 g_return_if_fail (minor);
1121 g_return_if_fail (micro);
1122 g_return_if_fail (nano);
1124 *major = GST_VERSION_MAJOR;
1125 *minor = GST_VERSION_MINOR;
1126 *micro = GST_VERSION_MICRO;
1127 *nano = GST_VERSION_NANO;
1131 * gst_version_string:
1133 * This function returns a string that is useful for describing this version
1134 * of GStreamer to the outside world: user agent strings, logging, ...
1136 * Returns: a newly allocated string describing this version of GStreamer.
1140 gst_version_string ()
1142 guint major, minor, micro, nano;
1144 gst_version (&major, &minor, µ, &nano);
1146 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1148 return g_strdup_printf ("GStreamer %d.%d.%d (GIT)", major, minor, micro);
1150 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1155 * gst_segtrap_is_enabled:
1157 * Some functions in the GStreamer core might install a custom SIGSEGV handler
1158 * to better catch and report errors to the application. Currently this feature
1159 * is enabled by default when loading plugins.
1161 * Applications might want to disable this behaviour with the
1162 * gst_segtrap_set_enabled() function. This is typically done if the application
1163 * wants to install its own handler without GStreamer interfering.
1165 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1170 gst_segtrap_is_enabled (void)
1172 /* yeps, it's enabled when it's not disabled */
1173 return !_gst_disable_segtrap;
1177 * gst_segtrap_set_enabled:
1178 * @enabled: whether a custom SIGSEGV handler should be installed.
1180 * Applications might want to disable/enable the SIGSEGV handling of
1181 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1186 gst_segtrap_set_enabled (gboolean enabled)
1188 _gst_disable_segtrap = !enabled;