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., 51 Franklin St, Fifth Floor,
20 * Boston, MA 02110-1301, 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 discrete
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 * ctx = g_option_context_new ("[ADDITIONAL ARGUMENTS]");
75 * g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
76 * g_option_context_add_group (ctx, gst_init_get_option_group ());
77 * if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
78 * g_print ("Error initializing: %s\n", GST_STR_NULL (err->message));
81 * g_option_context_free (ctx);
87 * Use gst_version() to query the library version at runtime or use the
88 * GST_VERSION_* macros to find the version at compile time. Optionally
89 * gst_version_string() returns a printable string.
91 * The gst_deinit() call is used to clean up all internal resources used
92 * by <application>GStreamer</application>. It is mostly used in unit tests
96 #include "gst_private.h"
97 #include "gstconfig.h"
100 #include <sys/types.h>
101 #ifdef HAVE_SYS_UTSNAME_H
102 #include <sys/utsname.h>
108 #define WIN32_LEAN_AND_MEAN /* prevents from including too many things */
109 #include <windows.h> /* GetStdHandle, windows console */
112 #include "gst-i18n-lib.h"
113 #include <locale.h> /* for LC_ALL */
117 #define GST_CAT_DEFAULT GST_CAT_GST_INIT
119 #define MAX_PATH_SPLIT 16
120 #define GST_PLUGIN_SEPARATOR ","
122 static gboolean gst_initialized = FALSE;
123 static gboolean gst_deinitialized = FALSE;
125 GstClockTime _priv_gst_start_time;
128 HMODULE _priv_gst_dll_handle = NULL;
131 #ifndef GST_DISABLE_REGISTRY
132 GList *_priv_gst_plugin_paths = NULL; /* for delayed processing in init_post */
134 extern gboolean _priv_gst_disable_registry;
135 extern gboolean _priv_gst_disable_registry_update;
138 #ifndef GST_DISABLE_GST_DEBUG
139 const gchar *priv_gst_dump_dot_dir;
144 /* set to TRUE when segfaults need to be left as is */
145 static gboolean _gst_disable_segtrap = FALSE;
147 static gboolean init_pre (GOptionContext * context, GOptionGroup * group,
148 gpointer data, GError ** error);
149 static gboolean init_post (GOptionContext * context, GOptionGroup * group,
150 gpointer data, GError ** error);
151 #ifndef GST_DISABLE_OPTION_PARSING
152 static gboolean parse_goption_arg (const gchar * s_opt,
153 const gchar * arg, gpointer data, GError ** err);
156 GSList *_priv_gst_preload_plugins = NULL;
158 const gchar g_log_domain_gstreamer[] = "GStreamer";
161 debug_log_handler (const gchar * log_domain,
162 GLogLevelFlags log_level, const gchar * message, gpointer user_data)
164 g_log_default_handler (log_domain, log_level, message, user_data);
165 /* FIXME: do we still need this ? fatal errors these days are all
166 * other than core errors */
167 /* g_on_error_query (NULL); */
174 #ifndef GST_DISABLE_GST_DEBUG
179 ARG_DEBUG_COLOR_MODE,
186 ARG_REGISTRY_UPDATE_DISABLE,
187 ARG_REGISTRY_FORK_DISABLE
190 /* debug-spec ::= category-spec [, category-spec]*
191 * category-spec ::= category:val | val
197 /* Note: DllMain is only called when DLLs are loaded or unloaded, so this will
198 * never be called if libgstreamer-1.0 is linked statically. Do not add any code
199 * here to, say, initialize variables or set things up since that will only
200 * happen for dynamically-built GStreamer.
202 * Also, ideally this should not be defined when GStreamer is built statically.
203 * i.e., it should be conditional on #ifdef DLL_EXPORT. It will be ignored, but
204 * if other libraries make the same mistake of defining it when building
205 * statically, there will be a symbol collision during linking. Fixing this
206 * requires one to build two object files: one for static linking and another
207 * for dynamic linking. */
208 BOOL WINAPI DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
210 DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
212 if (fdwReason == DLL_PROCESS_ATTACH)
213 _priv_gst_dll_handle = (HMODULE) hinstDLL;
220 * gst_init_get_option_group: (skip)
222 * Returns a #GOptionGroup with GStreamer's argument specifications. The
223 * group is set up to use standard GOption callbacks, so when using this
224 * group in combination with GOption parsing methods, all argument parsing
225 * and initialization is automated.
227 * This function is useful if you want to integrate GStreamer with other
228 * libraries that use GOption (see g_option_context_add_group() ).
230 * If you use this function, you should make sure you initialise the GLib
231 * threading system as one of the very first things in your program
232 * (see the example at the beginning of this section).
234 * Returns: (transfer full): a pointer to GStreamer's option group.
238 gst_init_get_option_group (void)
240 #ifndef GST_DISABLE_OPTION_PARSING
242 static const GOptionEntry gst_args[] = {
243 {"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
244 (gpointer) parse_goption_arg, N_("Print the GStreamer version"), NULL},
245 {"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
246 (gpointer) parse_goption_arg, N_("Make all warnings fatal"), NULL},
247 #ifndef GST_DISABLE_GST_DEBUG
248 {"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
249 (gpointer) parse_goption_arg,
250 N_("Print available debug categories and exit"),
252 {"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK,
253 (gpointer) parse_goption_arg,
254 N_("Default debug level from 1 (only error) to 9 (anything) or "
257 {"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) parse_goption_arg,
258 N_("Comma-separated list of category_name:level pairs to set "
259 "specific levels for the individual categories. Example: "
260 "GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
262 {"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
263 (gpointer) parse_goption_arg, N_("Disable colored debugging output"),
265 {"gst-debug-color-mode", 0, 0, G_OPTION_ARG_CALLBACK,
266 (gpointer) parse_goption_arg,
267 N_("Changes coloring mode of the debug log. "
268 "Possible modes: off, on, disable, auto, unix"),
270 {"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
271 (gpointer) parse_goption_arg, N_("Disable debugging"), NULL},
273 {"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
274 (gpointer) parse_goption_arg,
275 N_("Enable verbose plugin loading diagnostics"),
277 {"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK,
278 (gpointer) parse_goption_arg,
279 N_("Colon-separated paths containing plugins"), N_("PATHS")},
280 {"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK,
281 (gpointer) parse_goption_arg,
282 N_("Comma-separated list of plugins to preload in addition to the "
283 "list stored in environment variable GST_PLUGIN_PATH"),
285 {"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
286 (gpointer) parse_goption_arg,
287 N_("Disable trapping of segmentation faults during plugin loading"),
289 {"gst-disable-registry-update", 0, G_OPTION_FLAG_NO_ARG,
290 G_OPTION_ARG_CALLBACK,
291 (gpointer) parse_goption_arg,
292 N_("Disable updating the registry"),
294 {"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
295 G_OPTION_ARG_CALLBACK,
296 (gpointer) parse_goption_arg,
297 N_("Disable spawning a helper process while scanning the registry"),
302 group = g_option_group_new ("gst", _("GStreamer Options"),
303 _("Show GStreamer Options"), NULL, NULL);
304 g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
305 (GOptionParseFunc) init_post);
307 g_option_group_add_entries (group, gst_args);
308 g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
318 * @argc: (inout) (allow-none): pointer to application's argc
319 * @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
320 * @err: pointer to a #GError to which a message will be posted on error
322 * Initializes the GStreamer library, setting up internal path lists,
323 * registering built-in elements, and loading standard plugins.
325 * This function will return %FALSE if GStreamer could not be initialized
326 * for some reason. If you want your program to fail fatally,
327 * use gst_init() instead.
329 * Returns: %TRUE if GStreamer could be initialized.
332 gst_init_check (int *argc, char **argv[], GError ** err)
334 static GMutex init_lock;
335 #ifndef GST_DISABLE_OPTION_PARSING
341 g_mutex_lock (&init_lock);
343 if (gst_initialized) {
344 GST_DEBUG ("already initialized gst");
345 g_mutex_unlock (&init_lock);
348 #ifndef GST_DISABLE_OPTION_PARSING
349 ctx = g_option_context_new ("- GStreamer initialization");
350 g_option_context_set_ignore_unknown_options (ctx, TRUE);
351 g_option_context_set_help_enabled (ctx, FALSE);
352 group = gst_init_get_option_group ();
353 g_option_context_add_group (ctx, group);
354 res = g_option_context_parse (ctx, argc, argv, err);
355 g_option_context_free (ctx);
357 init_pre (NULL, NULL, NULL, NULL);
358 init_post (NULL, NULL, NULL, NULL);
362 gst_initialized = res;
364 g_mutex_unlock (&init_lock);
371 * @argc: (inout) (allow-none): pointer to application's argc
372 * @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
374 * Initializes the GStreamer library, setting up internal path lists,
375 * registering built-in elements, and loading standard plugins.
377 * Unless the plugin registry is disabled at compile time, the registry will be
378 * loaded. By default this will also check if the registry cache needs to be
379 * updated and rescan all plugins if needed. See gst_update_registry() for
380 * details and section
381 * <link linkend="gst-running">Running GStreamer Applications</link>
382 * for how to disable automatic registry updates.
385 * This function will terminate your program if it was unable to initialize
386 * GStreamer for some reason. If you want your program to fall back,
387 * use gst_init_check() instead.
390 * WARNING: This function does not work in the same way as corresponding
391 * functions in other glib-style libraries, such as gtk_init\(\). In
392 * particular, unknown command line options cause this function to
393 * abort program execution.
396 gst_init (int *argc, char **argv[])
400 if (!gst_init_check (argc, argv, &err)) {
401 g_print ("Could not initialize GStreamer: %s\n",
402 err ? err->message : "unknown error occurred");
411 * gst_is_initialized:
413 * Use this function to check if GStreamer has been initialized with gst_init()
414 * or gst_init_check().
416 * Returns: %TRUE if initialization has been done, %FALSE otherwise.
419 gst_is_initialized (void)
421 return gst_initialized;
424 #ifndef GST_DISABLE_REGISTRY
426 add_path_func (gpointer data, gpointer user_data)
428 GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
429 _priv_gst_plugin_paths =
430 g_list_append (_priv_gst_plugin_paths, g_strdup (data));
434 #ifndef GST_DISABLE_OPTION_PARSING
436 prepare_for_load_plugin_func (gpointer data, gpointer user_data)
438 _priv_gst_preload_plugins =
439 g_slist_prepend (_priv_gst_preload_plugins, g_strdup (data));
443 #ifndef GST_DISABLE_OPTION_PARSING
445 split_and_iterate (const gchar * stringlist, const gchar * separator,
446 GFunc iterator, gpointer user_data)
450 gchar *lastlist = g_strdup (stringlist);
453 strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
458 iterator (strings[j], user_data);
459 if (++j == MAX_PATH_SPLIT) {
460 lastlist = g_strdup (strings[j]);
465 g_strfreev (strings);
470 /* we have no fail cases yet, but maybe in the future */
472 init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
476 if (gst_initialized) {
477 GST_DEBUG ("already initialized");
481 _priv_gst_start_time = gst_util_get_timestamp ();
483 #ifndef GST_DISABLE_GST_DEBUG
484 _priv_gst_debug_init ();
485 priv_gst_dump_dot_dir = g_getenv ("GST_DEBUG_DUMP_DOT_DIR");
489 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
490 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
491 #endif /* ENABLE_NLS */
493 /* This is the earliest we can make stuff show up in the logs.
494 * So give some useful info about GStreamer here */
498 g_win32_get_package_installation_directory_of_module
499 (_priv_gst_dll_handle);
501 libdir = g_build_filename (basedir,
509 libdir = g_strdup (LIBDIR);
511 GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
512 GST_INFO ("Using library installed in %s", libdir);
515 #ifndef GST_DISABLE_REGISTRY
517 const gchar *disable_registry;
518 if ((disable_registry = g_getenv ("GST_REGISTRY_DISABLE"))) {
519 _priv_gst_disable_registry = (strcmp (disable_registry, "yes") == 0);
524 /* Print some basic system details if possible (OS/architecture) */
525 #ifdef HAVE_SYS_UTSNAME_H
527 struct utsname sys_details;
529 if (uname (&sys_details) == 0) {
530 GST_INFO ("%s %s %s %s %s", sys_details.sysname,
531 sys_details.nodename, sys_details.release, sys_details.version,
532 sys_details.machine);
537 #ifndef G_ATOMIC_LOCK_FREE
538 GST_CAT_WARNING (GST_CAT_PERFORMANCE, "GLib atomic operations are NOT "
539 "implemented using real hardware atomic operations!");
546 gst_register_core_elements (GstPlugin * plugin)
548 /* register some standard builtin types */
549 if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
551 !gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
554 g_assert_not_reached ();
561 * - initalization of threads if we use them
564 * - initializes gst_format
565 * - registers a bunch of types for gst_objects
567 * - we don't have cases yet where this fails, but in the future
568 * we might and then it's nice to be able to return that
571 init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
576 if (gst_initialized) {
577 GST_DEBUG ("already initialized");
581 llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
582 g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
584 _priv_gst_mini_object_initialize ();
585 _priv_gst_quarks_initialize ();
586 _priv_gst_allocator_initialize ();
587 _priv_gst_memory_initialize ();
588 _priv_gst_format_initialize ();
589 _priv_gst_query_initialize ();
590 _priv_gst_structure_initialize ();
591 _priv_gst_caps_initialize ();
592 _priv_gst_caps_features_initialize ();
593 _priv_gst_meta_initialize ();
594 _priv_gst_message_initialize ();
596 g_type_class_ref (gst_object_get_type ());
597 g_type_class_ref (gst_pad_get_type ());
598 g_type_class_ref (gst_element_factory_get_type ());
599 g_type_class_ref (gst_element_get_type ());
600 g_type_class_ref (gst_tracer_factory_get_type ());
601 g_type_class_ref (gst_type_find_factory_get_type ());
602 g_type_class_ref (gst_bin_get_type ());
603 g_type_class_ref (gst_bus_get_type ());
604 g_type_class_ref (gst_task_get_type ());
605 g_type_class_ref (gst_clock_get_type ());
606 g_type_class_ref (gst_debug_color_mode_get_type ());
608 gst_uri_handler_get_type ();
610 g_type_class_ref (gst_object_flags_get_type ());
611 g_type_class_ref (gst_bin_flags_get_type ());
612 g_type_class_ref (gst_buffer_flags_get_type ());
613 g_type_class_ref (gst_buffer_copy_flags_get_type ());
614 g_type_class_ref (gst_bus_flags_get_type ());
615 g_type_class_ref (gst_bus_sync_reply_get_type ());
616 g_type_class_ref (gst_caps_flags_get_type ());
617 g_type_class_ref (gst_clock_return_get_type ());
618 g_type_class_ref (gst_clock_entry_type_get_type ());
619 g_type_class_ref (gst_clock_flags_get_type ());
620 g_type_class_ref (gst_clock_type_get_type ());
621 g_type_class_ref (gst_debug_graph_details_get_type ());
622 g_type_class_ref (gst_state_get_type ());
623 g_type_class_ref (gst_state_change_return_get_type ());
624 g_type_class_ref (gst_state_change_get_type ());
625 g_type_class_ref (gst_element_flags_get_type ());
626 g_type_class_ref (gst_tracer_value_scope_get_type ());
627 g_type_class_ref (gst_tracer_value_flags_get_type ());
628 g_type_class_ref (gst_core_error_get_type ());
629 g_type_class_ref (gst_library_error_get_type ());
630 g_type_class_ref (gst_resource_error_get_type ());
631 g_type_class_ref (gst_stream_error_get_type ());
632 g_type_class_ref (gst_event_type_flags_get_type ());
633 g_type_class_ref (gst_event_type_get_type ());
634 g_type_class_ref (gst_seek_type_get_type ());
635 g_type_class_ref (gst_seek_flags_get_type ());
636 g_type_class_ref (gst_qos_type_get_type ());
637 g_type_class_ref (gst_format_get_type ());
638 g_type_class_ref (gst_debug_level_get_type ());
639 g_type_class_ref (gst_debug_color_flags_get_type ());
640 g_type_class_ref (gst_iterator_result_get_type ());
641 g_type_class_ref (gst_iterator_item_get_type ());
642 g_type_class_ref (gst_message_type_get_type ());
643 g_type_class_ref (gst_mini_object_flags_get_type ());
644 g_type_class_ref (gst_pad_link_return_get_type ());
645 g_type_class_ref (gst_pad_link_check_get_type ());
646 g_type_class_ref (gst_flow_return_get_type ());
647 g_type_class_ref (gst_pad_mode_get_type ());
648 g_type_class_ref (gst_pad_direction_get_type ());
649 g_type_class_ref (gst_pad_flags_get_type ());
650 g_type_class_ref (gst_pad_presence_get_type ());
651 g_type_class_ref (gst_pad_template_flags_get_type ());
652 g_type_class_ref (gst_pipeline_flags_get_type ());
653 g_type_class_ref (gst_plugin_error_get_type ());
654 g_type_class_ref (gst_plugin_flags_get_type ());
655 g_type_class_ref (gst_plugin_dependency_flags_get_type ());
656 g_type_class_ref (gst_rank_get_type ());
657 g_type_class_ref (gst_query_type_flags_get_type ());
658 g_type_class_ref (gst_query_type_get_type ());
659 g_type_class_ref (gst_buffering_mode_get_type ());
660 g_type_class_ref (gst_stream_status_type_get_type ());
661 g_type_class_ref (gst_structure_change_type_get_type ());
662 g_type_class_ref (gst_tag_merge_mode_get_type ());
663 g_type_class_ref (gst_tag_flag_get_type ());
664 g_type_class_ref (gst_tag_scope_get_type ());
665 g_type_class_ref (gst_task_pool_get_type ());
666 g_type_class_ref (gst_task_state_get_type ());
667 g_type_class_ref (gst_toc_entry_type_get_type ());
668 g_type_class_ref (gst_type_find_probability_get_type ());
669 g_type_class_ref (gst_uri_error_get_type ());
670 g_type_class_ref (gst_uri_type_get_type ());
671 g_type_class_ref (gst_parse_error_get_type ());
672 g_type_class_ref (gst_parse_flags_get_type ());
673 g_type_class_ref (gst_search_mode_get_type ());
674 g_type_class_ref (gst_progress_type_get_type ());
675 g_type_class_ref (gst_buffer_pool_acquire_flags_get_type ());
676 g_type_class_ref (gst_memory_flags_get_type ());
677 g_type_class_ref (gst_map_flags_get_type ());
678 g_type_class_ref (gst_caps_intersect_mode_get_type ());
679 g_type_class_ref (gst_pad_probe_type_get_type ());
680 g_type_class_ref (gst_pad_probe_return_get_type ());
681 g_type_class_ref (gst_segment_flags_get_type ());
682 g_type_class_ref (gst_scheduling_flags_get_type ());
683 g_type_class_ref (gst_meta_flags_get_type ());
684 g_type_class_ref (gst_toc_entry_type_get_type ());
685 g_type_class_ref (gst_toc_scope_get_type ());
686 g_type_class_ref (gst_toc_loop_type_get_type ());
687 g_type_class_ref (gst_control_binding_get_type ());
688 g_type_class_ref (gst_control_source_get_type ());
689 g_type_class_ref (gst_lock_flags_get_type ());
690 g_type_class_ref (gst_allocator_flags_get_type ());
691 g_type_class_ref (gst_stream_flags_get_type ());
692 g_type_class_ref (gst_stream_type_get_type ());
694 _priv_gst_event_initialize ();
695 _priv_gst_buffer_initialize ();
696 _priv_gst_buffer_list_initialize ();
697 _priv_gst_sample_initialize ();
698 _priv_gst_context_initialize ();
699 _priv_gst_date_time_initialize ();
700 _priv_gst_value_initialize ();
701 _priv_gst_tag_initialize ();
702 _priv_gst_toc_initialize ();
704 g_type_class_ref (gst_param_spec_fraction_get_type ());
705 gst_parse_context_get_type ();
707 _priv_gst_plugin_initialize ();
709 /* register core plugins */
710 gst_plugin_register_static (GST_VERSION_MAJOR, GST_VERSION_MINOR,
711 "staticelements", "core elements linked into the GStreamer library",
712 gst_register_core_elements, VERSION, GST_LICENSE, PACKAGE,
713 GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
716 * Any errors happening below this point are non-fatal, we therefore mark
717 * gstreamer as being initialized, since it is the case from a plugin point of
720 * If anything fails, it will be put back to %FALSE in gst_init_check().
721 * This allows some special plugins that would call gst_init() to not cause a
722 * looping effect (i.e. initializing GStreamer twice).
724 gst_initialized = TRUE;
726 if (!gst_update_registry ())
729 GST_INFO ("GLib runtime version: %d.%d.%d", glib_major_version,
730 glib_minor_version, glib_micro_version);
731 GST_INFO ("GLib headers version: %d.%d.%d", GLIB_MAJOR_VERSION,
732 GLIB_MINOR_VERSION, GLIB_MICRO_VERSION);
733 GST_INFO ("initialized GStreamer successfully");
735 #ifndef GST_DISABLE_GST_DEBUG
736 _priv_gst_tracing_init ();
742 #ifndef GST_DISABLE_GST_DEBUG
744 select_all (GstPlugin * plugin, gpointer user_data)
750 sort_by_category_name (gconstpointer a, gconstpointer b)
752 return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
753 gst_debug_category_get_name ((GstDebugCategory *) b));
757 gst_debug_help (void)
762 /* Need to ensure the registry is loaded to get debug categories */
763 if (!init_post (NULL, NULL, NULL, NULL))
766 list2 = gst_registry_plugin_filter (gst_registry_get (),
767 select_all, FALSE, NULL);
769 /* FIXME this is gross. why don't debug have categories PluginFeatures? */
770 for (g = list2; g; g = g_list_next (g)) {
771 GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
772 GList *features, *orig_features;
774 if (GST_OBJECT_FLAG_IS_SET (plugin, GST_PLUGIN_FLAG_BLACKLISTED))
777 gst_plugin_load (plugin);
778 /* Now create one of each feature so the class_init functions
779 * are called, as that's where most debug categories are
780 * registered. FIXME: If debug categories were a plugin feature,
781 * this would be unneeded */
782 orig_features = features =
783 gst_registry_get_feature_list_by_plugin (gst_registry_get (),
784 gst_plugin_get_name (plugin));
786 GstPluginFeature *feature;
788 if (G_UNLIKELY (features->data == NULL))
791 feature = GST_PLUGIN_FEATURE (features->data);
792 if (GST_IS_ELEMENT_FACTORY (feature)) {
793 GstElementFactory *factory;
796 factory = GST_ELEMENT_FACTORY (feature);
797 e = gst_element_factory_create (factory, NULL);
799 gst_object_unref (e);
803 features = g_list_next (features);
806 gst_plugin_feature_list_free (orig_features);
810 list = gst_debug_get_all_categories ();
811 walk = list = g_slist_sort (list, sort_by_category_name);
814 g_print ("name level description\n");
815 g_print ("---------------------+--------+--------------------------------\n");
819 GstDebugCategory *cat = (GstDebugCategory *) walk->data;
820 GstDebugColorMode coloring = gst_debug_get_color_mode ();
827 if (GST_DEBUG_COLOR_MODE_UNIX == coloring
828 || (on_unix && GST_DEBUG_COLOR_MODE_ON == coloring)) {
829 gchar *color = gst_debug_construct_term_color (cat->color);
831 g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
833 gst_debug_category_get_name (cat),
834 gst_debug_category_get_threshold (cat),
835 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
836 color, gst_debug_category_get_description (cat));
838 } else if (GST_DEBUG_COLOR_MODE_ON == coloring && !on_unix) {
840 gint color = gst_debug_construct_win_color (cat->color);
841 const gint clear = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
843 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
844 g_print ("%-20s", gst_debug_category_get_name (cat));
845 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
846 g_print (" %1d %s ", gst_debug_category_get_threshold (cat),
847 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)));
848 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
849 g_print ("%s", gst_debug_category_get_description (cat));
850 SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
852 #endif /* G_OS_WIN32 */
854 g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
855 gst_debug_category_get_threshold (cat),
856 gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
857 gst_debug_category_get_description (cat));
859 walk = g_slist_next (walk);
866 #ifndef GST_DISABLE_OPTION_PARSING
868 parse_one_option (gint opt, const gchar * arg, GError ** err)
872 g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
874 case ARG_FATAL_WARNINGS:{
875 GLogLevelFlags fatal_mask;
877 fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
878 fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
879 g_log_set_always_fatal (fatal_mask);
882 #ifndef GST_DISABLE_GST_DEBUG
883 case ARG_DEBUG_LEVEL:{
884 GstDebugLevel tmp = GST_LEVEL_NONE;
886 tmp = (GstDebugLevel) strtol (arg, NULL, 0);
887 if (((guint) tmp) < GST_LEVEL_COUNT) {
888 gst_debug_set_default_threshold (tmp);
893 gst_debug_set_threshold_from_string (arg, FALSE);
895 case ARG_DEBUG_NO_COLOR:
896 gst_debug_set_colored (FALSE);
898 case ARG_DEBUG_COLOR_MODE:
899 gst_debug_set_color_mode_from_string (arg);
901 case ARG_DEBUG_DISABLE:
902 gst_debug_set_active (FALSE);
908 case ARG_PLUGIN_SPEW:
910 case ARG_PLUGIN_PATH:
911 #ifndef GST_DISABLE_REGISTRY
912 if (!_priv_gst_disable_registry)
913 split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
914 #endif /* GST_DISABLE_REGISTRY */
916 case ARG_PLUGIN_LOAD:
917 split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
919 case ARG_SEGTRAP_DISABLE:
920 _gst_disable_segtrap = TRUE;
922 case ARG_REGISTRY_UPDATE_DISABLE:
923 #ifndef GST_DISABLE_REGISTRY
924 if (!_priv_gst_disable_registry)
925 _priv_gst_disable_registry_update = TRUE;
928 case ARG_REGISTRY_FORK_DISABLE:
929 gst_registry_fork_set_enabled (FALSE);
932 g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
933 _("Unknown option"));
941 parse_goption_arg (const gchar * opt,
942 const gchar * arg, gpointer data, GError ** err)
950 "--gst-version", ARG_VERSION}, {
951 "--gst-fatal-warnings", ARG_FATAL_WARNINGS},
952 #ifndef GST_DISABLE_GST_DEBUG
954 "--gst-debug-level", ARG_DEBUG_LEVEL}, {
955 "--gst-debug", ARG_DEBUG}, {
956 "--gst-debug-disable", ARG_DEBUG_DISABLE}, {
957 "--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
958 "--gst-debug-color-mode", ARG_DEBUG_COLOR_MODE}, {
959 "--gst-debug-help", ARG_DEBUG_HELP},
962 "--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
963 "--gst-plugin-path", ARG_PLUGIN_PATH}, {
964 "--gst-plugin-load", ARG_PLUGIN_LOAD}, {
965 "--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
966 "--gst-disable-registry-update", ARG_REGISTRY_UPDATE_DISABLE}, {
967 "--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
972 for (n = 0; options[n].opt; n++) {
973 if (!strcmp (opt, options[n].opt)) {
974 val = options[n].val;
979 return parse_one_option (val, arg, err);
986 * Clean up any resources created by GStreamer in gst_init().
988 * It is normally not needed to call this function in a normal application
989 * as the resources will automatically be freed when the program terminates.
990 * This function is therefore mostly used by testsuites and other memory
993 * After this call GStreamer (including this method) should not be used anymore.
998 GstBinClass *bin_class;
1001 GST_INFO ("deinitializing GStreamer");
1003 if (gst_deinitialized) {
1004 GST_DEBUG ("already deinitialized");
1007 g_thread_pool_set_max_unused_threads (0);
1008 bin_class = GST_BIN_CLASS (g_type_class_peek (gst_bin_get_type ()));
1009 if (bin_class->pool != NULL) {
1010 g_thread_pool_free (bin_class->pool, FALSE, TRUE);
1011 bin_class->pool = NULL;
1013 gst_task_cleanup_all ();
1015 g_slist_foreach (_priv_gst_preload_plugins, (GFunc) g_free, NULL);
1016 g_slist_free (_priv_gst_preload_plugins);
1017 _priv_gst_preload_plugins = NULL;
1019 #ifndef GST_DISABLE_REGISTRY
1020 g_list_foreach (_priv_gst_plugin_paths, (GFunc) g_free, NULL);
1021 g_list_free (_priv_gst_plugin_paths);
1022 _priv_gst_plugin_paths = NULL;
1025 clock = gst_system_clock_obtain ();
1026 gst_object_unref (clock);
1027 gst_object_unref (clock);
1029 _priv_gst_registry_cleanup ();
1030 _priv_gst_allocator_cleanup ();
1032 /* We want to destroy tracers as late as possible for the leaks tracer
1033 * but still need to keep the caps system alive as it may have to use
1034 * gst_caps_to_string() to display leaked caps. */
1035 #ifndef GST_DISABLE_GST_DEBUG
1036 _priv_gst_tracing_deinit ();
1039 _priv_gst_caps_features_cleanup ();
1040 _priv_gst_caps_cleanup ();
1042 g_type_class_unref (g_type_class_peek (gst_object_get_type ()));
1043 g_type_class_unref (g_type_class_peek (gst_pad_get_type ()));
1044 g_type_class_unref (g_type_class_peek (gst_element_factory_get_type ()));
1045 g_type_class_unref (g_type_class_peek (gst_element_get_type ()));
1046 g_type_class_unref (g_type_class_peek (gst_tracer_factory_get_type ()));
1047 g_type_class_unref (g_type_class_peek (gst_type_find_factory_get_type ()));
1048 g_type_class_unref (g_type_class_peek (gst_bin_get_type ()));
1049 g_type_class_unref (g_type_class_peek (gst_bus_get_type ()));
1050 g_type_class_unref (g_type_class_peek (gst_task_get_type ()));
1051 g_type_class_unref (g_type_class_peek (gst_object_flags_get_type ()));
1052 g_type_class_unref (g_type_class_peek (gst_bin_flags_get_type ()));
1053 g_type_class_unref (g_type_class_peek (gst_buffer_flags_get_type ()));
1054 g_type_class_unref (g_type_class_peek (gst_buffer_copy_flags_get_type ()));
1055 g_type_class_unref (g_type_class_peek (gst_bus_flags_get_type ()));
1056 g_type_class_unref (g_type_class_peek (gst_bus_sync_reply_get_type ()));
1057 g_type_class_unref (g_type_class_peek (gst_caps_flags_get_type ()));
1058 g_type_class_unref (g_type_class_peek (gst_clock_type_get_type ()));
1059 g_type_class_unref (g_type_class_peek (gst_clock_return_get_type ()));
1060 g_type_class_unref (g_type_class_peek (gst_clock_entry_type_get_type ()));
1061 g_type_class_unref (g_type_class_peek (gst_clock_flags_get_type ()));
1062 g_type_class_unref (g_type_class_peek (gst_debug_graph_details_get_type ()));
1063 g_type_class_unref (g_type_class_peek (gst_state_get_type ()));
1064 g_type_class_unref (g_type_class_peek (gst_state_change_return_get_type ()));
1065 g_type_class_unref (g_type_class_peek (gst_state_change_get_type ()));
1066 g_type_class_unref (g_type_class_peek (gst_element_flags_get_type ()));
1067 g_type_class_unref (g_type_class_peek (gst_tracer_value_scope_get_type ()));
1068 g_type_class_unref (g_type_class_peek (gst_tracer_value_flags_get_type ()));
1069 g_type_class_unref (g_type_class_peek (gst_core_error_get_type ()));
1070 g_type_class_unref (g_type_class_peek (gst_library_error_get_type ()));
1071 g_type_class_unref (g_type_class_peek (gst_plugin_dependency_flags_get_type
1073 g_type_class_unref (g_type_class_peek (gst_parse_flags_get_type ()));
1074 g_type_class_unref (g_type_class_peek (gst_resource_error_get_type ()));
1075 g_type_class_unref (g_type_class_peek (gst_search_mode_get_type ()));
1076 g_type_class_unref (g_type_class_peek (gst_stream_error_get_type ()));
1077 g_type_class_unref (g_type_class_peek (gst_stream_status_type_get_type ()));
1078 g_type_class_unref (g_type_class_peek (gst_structure_change_type_get_type
1080 g_type_class_unref (g_type_class_peek (gst_event_type_flags_get_type ()));
1081 g_type_class_unref (g_type_class_peek (gst_event_type_get_type ()));
1082 g_type_class_unref (g_type_class_peek (gst_seek_type_get_type ()));
1083 g_type_class_unref (g_type_class_peek (gst_seek_flags_get_type ()));
1084 g_type_class_unref (g_type_class_peek (gst_qos_type_get_type ()));
1085 g_type_class_unref (g_type_class_peek (gst_format_get_type ()));
1086 g_type_class_unref (g_type_class_peek (gst_debug_level_get_type ()));
1087 g_type_class_unref (g_type_class_peek (gst_debug_color_flags_get_type ()));
1088 g_type_class_unref (g_type_class_peek (gst_iterator_result_get_type ()));
1089 g_type_class_unref (g_type_class_peek (gst_iterator_item_get_type ()));
1090 g_type_class_unref (g_type_class_peek (gst_message_type_get_type ()));
1091 g_type_class_unref (g_type_class_peek (gst_meta_flags_get_type ()));
1092 g_type_class_unref (g_type_class_peek (gst_mini_object_flags_get_type ()));
1093 g_type_class_unref (g_type_class_peek (gst_pad_link_return_get_type ()));
1094 g_type_class_unref (g_type_class_peek (gst_pad_link_check_get_type ()));
1095 g_type_class_unref (g_type_class_peek (gst_flow_return_get_type ()));
1096 g_type_class_unref (g_type_class_peek (gst_pad_mode_get_type ()));
1097 g_type_class_unref (g_type_class_peek (gst_pad_direction_get_type ()));
1098 g_type_class_unref (g_type_class_peek (gst_pad_flags_get_type ()));
1099 g_type_class_unref (g_type_class_peek (gst_pad_presence_get_type ()));
1100 g_type_class_unref (g_type_class_peek (gst_pad_template_flags_get_type ()));
1101 g_type_class_unref (g_type_class_peek (gst_pipeline_flags_get_type ()));
1102 g_type_class_unref (g_type_class_peek (gst_plugin_error_get_type ()));
1103 g_type_class_unref (g_type_class_peek (gst_plugin_flags_get_type ()));
1104 g_type_class_unref (g_type_class_peek (gst_rank_get_type ()));
1105 g_type_class_unref (g_type_class_peek (gst_query_type_flags_get_type ()));
1106 g_type_class_unref (g_type_class_peek (gst_query_type_get_type ()));
1107 g_type_class_unref (g_type_class_peek (gst_buffering_mode_get_type ()));
1108 g_type_class_unref (g_type_class_peek (gst_tag_merge_mode_get_type ()));
1109 g_type_class_unref (g_type_class_peek (gst_tag_flag_get_type ()));
1110 g_type_class_unref (g_type_class_peek (gst_tag_scope_get_type ()));
1111 g_type_class_unref (g_type_class_peek (gst_task_state_get_type ()));
1112 g_type_class_unref (g_type_class_peek (gst_toc_entry_type_get_type ()));
1113 g_type_class_unref (g_type_class_peek (gst_toc_scope_get_type ()));
1114 g_type_class_unref (g_type_class_peek (gst_type_find_probability_get_type
1116 g_type_class_unref (g_type_class_peek (gst_uri_type_get_type ()));
1117 g_type_class_unref (g_type_class_peek (gst_uri_error_get_type ()));
1118 g_type_class_unref (g_type_class_peek (gst_parse_error_get_type ()));
1119 g_type_class_unref (g_type_class_peek (gst_param_spec_fraction_get_type ()));
1120 g_type_class_unref (g_type_class_peek (gst_progress_type_get_type ()));
1121 g_type_class_unref (g_type_class_peek (gst_buffer_pool_acquire_flags_get_type
1123 g_type_class_unref (g_type_class_peek (gst_memory_flags_get_type ()));
1124 g_type_class_unref (g_type_class_peek (gst_map_flags_get_type ()));
1125 g_type_class_unref (g_type_class_peek (gst_caps_intersect_mode_get_type ()));
1126 g_type_class_unref (g_type_class_peek (gst_pad_probe_type_get_type ()));
1127 g_type_class_unref (g_type_class_peek (gst_pad_probe_return_get_type ()));
1128 g_type_class_unref (g_type_class_peek (gst_segment_flags_get_type ()));
1129 g_type_class_unref (g_type_class_peek (gst_scheduling_flags_get_type ()));
1130 g_type_class_unref (g_type_class_peek (gst_stream_type_get_type ()));
1132 g_type_class_unref (g_type_class_peek (gst_control_binding_get_type ()));
1133 g_type_class_unref (g_type_class_peek (gst_control_source_get_type ()));
1134 g_type_class_unref (g_type_class_peek (gst_toc_entry_type_get_type ()));
1135 g_type_class_unref (g_type_class_peek (gst_toc_loop_type_get_type ()));
1136 g_type_class_unref (g_type_class_peek (gst_lock_flags_get_type ()));
1137 g_type_class_unref (g_type_class_peek (gst_allocator_flags_get_type ()));
1138 g_type_class_unref (g_type_class_peek (gst_stream_flags_get_type ()));
1139 g_type_class_unref (g_type_class_peek (gst_debug_color_mode_get_type ()));
1141 gst_deinitialized = TRUE;
1142 GST_INFO ("deinitialized GStreamer");
1147 * @major: (out): pointer to a guint to store the major version number
1148 * @minor: (out): pointer to a guint to store the minor version number
1149 * @micro: (out): pointer to a guint to store the micro version number
1150 * @nano: (out): pointer to a guint to store the nano version number
1152 * Gets the version number of the GStreamer library.
1155 gst_version (guint * major, guint * minor, guint * micro, guint * nano)
1157 g_return_if_fail (major);
1158 g_return_if_fail (minor);
1159 g_return_if_fail (micro);
1160 g_return_if_fail (nano);
1162 *major = GST_VERSION_MAJOR;
1163 *minor = GST_VERSION_MINOR;
1164 *micro = GST_VERSION_MICRO;
1165 *nano = GST_VERSION_NANO;
1169 * gst_version_string:
1171 * This function returns a string that is useful for describing this version
1172 * of GStreamer to the outside world: user agent strings, logging, ...
1174 * Returns: (transfer full): a newly allocated string describing this version
1179 gst_version_string (void)
1181 guint major, minor, micro, nano;
1183 gst_version (&major, &minor, µ, &nano);
1185 return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
1187 return g_strdup_printf ("GStreamer %d.%d.%d (GIT)", major, minor, micro);
1189 return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
1194 * gst_segtrap_is_enabled:
1196 * Some functions in the GStreamer core might install a custom SIGSEGV handler
1197 * to better catch and report errors to the application. Currently this feature
1198 * is enabled by default when loading plugins.
1200 * Applications might want to disable this behaviour with the
1201 * gst_segtrap_set_enabled() function. This is typically done if the application
1202 * wants to install its own handler without GStreamer interfering.
1204 * Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
1207 gst_segtrap_is_enabled (void)
1209 /* yeps, it's enabled when it's not disabled */
1210 return !_gst_disable_segtrap;
1214 * gst_segtrap_set_enabled:
1215 * @enabled: whether a custom SIGSEGV handler should be installed.
1217 * Applications might want to disable/enable the SIGSEGV handling of
1218 * the GStreamer core. See gst_segtrap_is_enabled() for more information.
1221 gst_segtrap_set_enabled (gboolean enabled)
1223 _gst_disable_segtrap = !enabled;