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gstreamer/gst/gst.c
Tim-Philipp Müller 1654b7f1d7 Use GLib's type for GError instead of our own 
We introduced our own when GLib didn't want to add a GType
for GError. But now that there is one, we can use GLib's
unconditionally and remove our version.
2012-01-22 15:16:14 +00:00

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gst.c: Initialization and non-pipeline operations
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:gst
* @short_description: Media library supporting arbitrary formats and filter
* graphs.
*
* GStreamer is a framework for constructing graphs of various filters
* (termed elements here) that will handle streaming media. Any discreet
* (packetizable) media type is supported, with provisions for automatically
* determining source type. Formatting/framing information is provided with
* a powerful negotiation framework. Plugins are heavily used to provide for
* all elements, allowing one to construct plugins outside of the GST
* library, even released binary-only if license require (please don't).
* GStreamer covers a wide range of use cases including: playback, recording,
* editing, serving streams, voice over ip and video calls.
*
* The <application>GStreamer</application> library should be initialized with
* gst_init() before it can be used. You should pass pointers to the main argc
* and argv variables so that GStreamer can process its own command line
* options, as shown in the following example.
*
* <example>
* <title>Initializing the gstreamer library</title>
* <programlisting language="c">
* int
* main (int argc, char *argv[])
* {
* // initialize the GStreamer library
* gst_init (&amp;argc, &amp;argv);
* ...
* }
* </programlisting>
* </example>
*
* It's allowed to pass two NULL pointers to gst_init() in case you don't want
* to pass the command line args to GStreamer.
*
* You can also use GOption to initialize your own parameters as shown in
* the next code fragment:
* <example>
* <title>Initializing own parameters when initializing gstreamer</title>
* <programlisting>
* static gboolean stats = FALSE;
* ...
* int
* main (int argc, char *argv[])
* {
* GOptionEntry options[] = {
* {"tags", 't', 0, G_OPTION_ARG_NONE, &amp;tags,
* N_("Output tags (also known as metadata)"), NULL},
* {NULL}
* };
* // must initialise the threading system before using any other GLib funtion
* if (!g_thread_supported ())
* g_thread_init (NULL);
* ctx = g_option_context_new ("[ADDITIONAL ARGUMENTS]");
* g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
* g_option_context_add_group (ctx, gst_init_get_option_group ());
* if (!g_option_context_parse (ctx, &amp;argc, &amp;argv, &amp;err)) {
* g_print ("Error initializing: &percnt;s\n", GST_STR_NULL (err->message));
* exit (1);
* }
* g_option_context_free (ctx);
* ...
* }
* </programlisting>
* </example>
*
* Use gst_version() to query the library version at runtime or use the
* GST_VERSION_* macros to find the version at compile time. Optionally
* gst_version_string() returns a printable string.
*
* The gst_deinit() call is used to clean up all internal resources used
* by <application>GStreamer</application>. It is mostly used in unit tests
* to check for leaks.
*
* Last reviewed on 2006-08-11 (0.10.10)
*/
#include "gst_private.h"
#include "gstconfig.h"
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#ifdef HAVE_SYS_UTSNAME_H
#include <sys/utsname.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef G_OS_WIN32
#define WIN32_LEAN_AND_MEAN /* prevents from including too many things */
#include <windows.h> /* GetStdHandle, windows console */
#endif
#include "gst-i18n-lib.h"
#include <locale.h> /* for LC_ALL */
#include "gst.h"
#define GST_CAT_DEFAULT GST_CAT_GST_INIT
#define MAX_PATH_SPLIT 16
#define GST_PLUGIN_SEPARATOR ","
static gboolean gst_initialized = FALSE;
static gboolean gst_deinitialized = FALSE;
#ifdef G_OS_WIN32
HMODULE _priv_gst_dll_handle = NULL;
#endif
#ifndef GST_DISABLE_REGISTRY
GList *_priv_gst_plugin_paths = NULL; /* for delayed processing in post_init */
extern gboolean _priv_gst_disable_registry_update;
#endif
#ifndef GST_DISABLE_GST_DEBUG
extern const gchar *priv_gst_dump_dot_dir;
#endif
/* defaults */
/* set to TRUE when segfaults need to be left as is */
static gboolean _gst_disable_segtrap = FALSE;
static gboolean init_pre (GOptionContext * context, GOptionGroup * group,
gpointer data, GError ** error);
static gboolean init_post (GOptionContext * context, GOptionGroup * group,
gpointer data, GError ** error);
#ifndef GST_DISABLE_OPTION_PARSING
static gboolean parse_goption_arg (const gchar * s_opt,
const gchar * arg, gpointer data, GError ** err);
#endif
GSList *_priv_gst_preload_plugins = NULL;
const gchar g_log_domain_gstreamer[] = "GStreamer";
static void
debug_log_handler (const gchar * log_domain,
GLogLevelFlags log_level, const gchar * message, gpointer user_data)
{
g_log_default_handler (log_domain, log_level, message, user_data);
/* FIXME: do we still need this ? fatal errors these days are all
* other than core errors */
/* g_on_error_query (NULL); */
}
enum
{
ARG_VERSION = 1,
ARG_FATAL_WARNINGS,
#ifndef GST_DISABLE_GST_DEBUG
ARG_DEBUG_LEVEL,
ARG_DEBUG,
ARG_DEBUG_DISABLE,
ARG_DEBUG_NO_COLOR,
ARG_DEBUG_HELP,
#endif
ARG_PLUGIN_SPEW,
ARG_PLUGIN_PATH,
ARG_PLUGIN_LOAD,
ARG_SEGTRAP_DISABLE,
ARG_REGISTRY_UPDATE_DISABLE,
ARG_REGISTRY_FORK_DISABLE
};
/* debug-spec ::= category-spec [, category-spec]*
* category-spec ::= category:val | val
* category ::= [^:]+
* val ::= [0-5]
*/
#ifndef NUL
#define NUL '\0'
#endif
#ifndef GST_DISABLE_GST_DEBUG
static gboolean
parse_debug_category (gchar * str, const gchar ** category)
{
if (!str)
return FALSE;
/* works in place */
g_strstrip (str);
if (str[0] != NUL) {
*category = str;
return TRUE;
}
return FALSE;
}
static gboolean
parse_debug_level (gchar * str, GstDebugLevel * level)
{
if (!str)
return FALSE;
/* works in place */
g_strstrip (str);
if (str[0] != NUL && str[1] == NUL
&& str[0] >= '0' && str[0] < '0' + GST_LEVEL_COUNT) {
*level = (GstDebugLevel) (str[0] - '0');
return TRUE;
}
return FALSE;
}
static void
parse_debug_list (const gchar * list)
{
gchar **split;
gchar **walk;
g_assert (list);
split = g_strsplit (list, ",", 0);
for (walk = split; *walk; walk++) {
if (strchr (*walk, ':')) {
gchar **values = g_strsplit (*walk, ":", 2);
if (values[0] && values[1]) {
GstDebugLevel level;
const gchar *category;
if (parse_debug_category (values[0], &category)
&& parse_debug_level (values[1], &level))
gst_debug_set_threshold_for_name (category, level);
}
g_strfreev (values);
} else {
GstDebugLevel level;
if (parse_debug_level (*walk, &level))
gst_debug_set_default_threshold (level);
}
}
g_strfreev (split);
}
#endif
#ifdef G_OS_WIN32
BOOL WINAPI DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
BOOL WINAPI
DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
if (fdwReason == DLL_PROCESS_ATTACH)
_priv_gst_dll_handle = (HMODULE) hinstDLL;
return TRUE;
}
#endif
/**
* gst_init_get_option_group: (skip)
*
* Returns a #GOptionGroup with GStreamer's argument specifications. The
* group is set up to use standard GOption callbacks, so when using this
* group in combination with GOption parsing methods, all argument parsing
* and initialization is automated.
*
* This function is useful if you want to integrate GStreamer with other
* libraries that use GOption (see g_option_context_add_group() ).
*
* If you use this function, you should make sure you initialise the GLib
* threading system as one of the very first things in your program
* (see the example at the beginning of this section).
*
* Returns: (transfer full): a pointer to GStreamer's option group.
*/
GOptionGroup *
gst_init_get_option_group (void)
{
#ifndef GST_DISABLE_OPTION_PARSING
GOptionGroup *group;
static const GOptionEntry gst_args[] = {
{"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg, N_("Print the GStreamer version"), NULL},
{"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg, N_("Make all warnings fatal"), NULL},
#ifndef GST_DISABLE_GST_DEBUG
{"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg,
N_("Print available debug categories and exit"),
NULL},
{"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg,
N_("Default debug level from 1 (only error) to 5 (anything) or "
"0 for no output"),
N_("LEVEL")},
{"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) parse_goption_arg,
N_("Comma-separated list of category_name:level pairs to set "
"specific levels for the individual categories. Example: "
"GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
N_("LIST")},
{"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg, N_("Disable colored debugging output"),
NULL},
{"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg, N_("Disable debugging"), NULL},
#endif
{"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg,
N_("Enable verbose plugin loading diagnostics"),
NULL},
{"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg,
N_("Colon-separated paths containing plugins"), N_("PATHS")},
{"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg,
N_("Comma-separated list of plugins to preload in addition to the "
"list stored in environment variable GST_PLUGIN_PATH"),
N_("PLUGINS")},
{"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg,
N_("Disable trapping of segmentation faults during plugin loading"),
NULL},
{"gst-disable-registry-update", 0, G_OPTION_FLAG_NO_ARG,
G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg,
N_("Disable updating the registry"),
NULL},
{"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
G_OPTION_ARG_CALLBACK,
(gpointer) parse_goption_arg,
N_("Disable spawning a helper process while scanning the registry"),
NULL},
{NULL}
};
group = g_option_group_new ("gst", _("GStreamer Options"),
_("Show GStreamer Options"), NULL, NULL);
g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
(GOptionParseFunc) init_post);
g_option_group_add_entries (group, gst_args);
g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
return group;
#else
return NULL;
#endif
}
/**
* gst_init_check:
* @argc: (inout) (allow-none): pointer to application's argc
* @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
* @err: pointer to a #GError to which a message will be posted on error
*
* Initializes the GStreamer library, setting up internal path lists,
* registering built-in elements, and loading standard plugins.
*
* This function will return %FALSE if GStreamer could not be initialized
* for some reason. If you want your program to fail fatally,
* use gst_init() instead.
*
* This function should be called before calling any other GLib functions. If
* this is not an option, your program must initialise the GLib thread system
* using g_thread_init() before any other GLib functions are called.
*
* Returns: %TRUE if GStreamer could be initialized.
*/
gboolean
gst_init_check (int *argc, char **argv[], GError ** err)
{
#ifndef GST_DISABLE_OPTION_PARSING
GOptionGroup *group;
GOptionContext *ctx;
#endif
gboolean res;
if (gst_initialized) {
GST_DEBUG ("already initialized gst");
return TRUE;
}
#ifndef GST_DISABLE_OPTION_PARSING
ctx = g_option_context_new ("- GStreamer initialization");
g_option_context_set_ignore_unknown_options (ctx, TRUE);
group = gst_init_get_option_group ();
g_option_context_add_group (ctx, group);
res = g_option_context_parse (ctx, argc, argv, err);
g_option_context_free (ctx);
#else
init_pre (NULL, NULL, NULL, NULL);
init_post (NULL, NULL, NULL, NULL);
res = TRUE;
#endif
gst_initialized = res;
if (res) {
GST_INFO ("initialized GStreamer successfully");
} else {
GST_INFO ("failed to initialize GStreamer");
}
return res;
}
/**
* gst_init:
* @argc: (inout) (allow-none): pointer to application's argc
* @argv: (inout) (array length=argc) (allow-none): pointer to application's argv
*
* Initializes the GStreamer library, setting up internal path lists,
* registering built-in elements, and loading standard plugins.
*
* Unless the plugin registry is disabled at compile time, the registry will be
* loaded. By default this will also check if the registry cache needs to be
* updated and rescan all plugins if needed. See gst_update_registry() for
* details and section
* <link linkend="gst-running">Running GStreamer Applications</link>
* for how to disable automatic registry updates.
*
* This function should be called before calling any other GLib functions. If
* this is not an option, your program must initialise the GLib thread system
* using g_thread_init() before any other GLib functions are called.
*
* <note><para>
* This function will terminate your program if it was unable to initialize
* GStreamer for some reason. If you want your program to fall back,
* use gst_init_check() instead.
* </para></note>
*
* WARNING: This function does not work in the same way as corresponding
* functions in other glib-style libraries, such as gtk_init(). In
* particular, unknown command line options cause this function to
* abort program execution.
*/
void
gst_init (int *argc, char **argv[])
{
GError *err = NULL;
if (!gst_init_check (argc, argv, &err)) {
g_print ("Could not initialize GStreamer: %s\n",
err ? err->message : "unknown error occurred");
if (err) {
g_error_free (err);
}
exit (1);
}
}
/**
* gst_is_initialized:
*
* Use this function to check if GStreamer has been initialized with gst_init()
* or gst_init_check().
*
* Returns: TRUE if initialization has been done, FALSE otherwise.
*
* Since: 0.10.31
*/
gboolean
gst_is_initialized (void)
{
return gst_initialized;
}
#ifndef GST_DISABLE_REGISTRY
static void
add_path_func (gpointer data, gpointer user_data)
{
GST_INFO ("Adding plugin path: \"%s\", will scan later", (gchar *) data);
_priv_gst_plugin_paths =
g_list_append (_priv_gst_plugin_paths, g_strdup (data));
}
#endif
#ifndef GST_DISABLE_OPTION_PARSING
static void
prepare_for_load_plugin_func (gpointer data, gpointer user_data)
{
_priv_gst_preload_plugins =
g_slist_prepend (_priv_gst_preload_plugins, g_strdup (data));
}
#endif
#ifndef GST_DISABLE_OPTION_PARSING
static void
split_and_iterate (const gchar * stringlist, const gchar * separator,
GFunc iterator, gpointer user_data)
{
gchar **strings;
gint j = 0;
gchar *lastlist = g_strdup (stringlist);
while (lastlist) {
strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
g_free (lastlist);
lastlist = NULL;
while (strings[j]) {
iterator (strings[j], user_data);
if (++j == MAX_PATH_SPLIT) {
lastlist = g_strdup (strings[j]);
j = 0;
break;
}
}
g_strfreev (strings);
}
}
#endif
/* we have no fail cases yet, but maybe in the future */
static gboolean
init_pre (GOptionContext * context, GOptionGroup * group, gpointer data,
GError ** error)
{
if (gst_initialized) {
GST_DEBUG ("already initialized");
return TRUE;
}
g_type_init ();
#ifndef GST_DISABLE_GST_DEBUG
_priv_gst_debug_init ();
#endif
#ifdef ENABLE_NLS
setlocale (LC_ALL, "");
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
#endif /* ENABLE_NLS */
#ifndef GST_DISABLE_GST_DEBUG
{
const gchar *debug_list;
if (g_getenv ("GST_DEBUG_NO_COLOR") != NULL)
gst_debug_set_colored (FALSE);
debug_list = g_getenv ("GST_DEBUG");
if (debug_list) {
parse_debug_list (debug_list);
}
}
priv_gst_dump_dot_dir = g_getenv ("GST_DEBUG_DUMP_DOT_DIR");
#endif
/* This is the earliest we can make stuff show up in the logs.
* So give some useful info about GStreamer here */
GST_INFO ("Initializing GStreamer Core Library version %s", VERSION);
GST_INFO ("Using library installed in %s", LIBDIR);
/* Print some basic system details if possible (OS/architecture) */
#ifdef HAVE_SYS_UTSNAME_H
{
struct utsname sys_details;
if (uname (&sys_details) == 0) {
GST_INFO ("%s %s %s %s %s", sys_details.sysname,
sys_details.nodename, sys_details.release, sys_details.version,
sys_details.machine);
}
}
#endif
return TRUE;
}
static gboolean
gst_register_core_elements (GstPlugin * plugin)
{
/* register some standard builtin types */
if (!gst_element_register (plugin, "bin", GST_RANK_PRIMARY,
GST_TYPE_BIN) ||
!gst_element_register (plugin, "pipeline", GST_RANK_PRIMARY,
GST_TYPE_PIPELINE)
)
g_assert_not_reached ();
return TRUE;
}
/*
* this bit handles:
* - initalization of threads if we use them
* - log handler
* - initial output
* - initializes gst_format
* - registers a bunch of types for gst_objects
*
* - we don't have cases yet where this fails, but in the future
* we might and then it's nice to be able to return that
*/
static gboolean
init_post (GOptionContext * context, GOptionGroup * group, gpointer data,
GError ** error)
{
GLogLevelFlags llf;
#ifndef GST_DISABLE_TRACE
GstTrace *gst_trace;
#endif /* GST_DISABLE_TRACE */
if (gst_initialized) {
GST_DEBUG ("already initialized");
return TRUE;
}
llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
g_log_set_handler (g_log_domain_gstreamer, llf, debug_log_handler, NULL);
_priv_gst_quarks_initialize ();
_priv_gst_memory_initialize ();
_priv_gst_format_initialize ();
_priv_gst_query_initialize ();
_priv_gst_structure_initialize ();
_priv_gst_caps_initialize ();
_priv_gst_meta_initialize ();
g_mutex_init (&_gst_trace_mutex);
g_type_class_ref (gst_object_get_type ());
g_type_class_ref (gst_pad_get_type ());
g_type_class_ref (gst_element_factory_get_type ());
g_type_class_ref (gst_element_get_type ());
g_type_class_ref (gst_type_find_factory_get_type ());
g_type_class_ref (gst_bin_get_type ());
g_type_class_ref (gst_bus_get_type ());
g_type_class_ref (gst_task_get_type ());
g_type_class_ref (gst_clock_get_type ());
gst_uri_handler_get_type ();
g_type_class_ref (gst_object_flags_get_type ());
g_type_class_ref (gst_bin_flags_get_type ());
g_type_class_ref (gst_buffer_flags_get_type ());
g_type_class_ref (gst_buffer_copy_flags_get_type ());
g_type_class_ref (gst_bus_flags_get_type ());
g_type_class_ref (gst_bus_sync_reply_get_type ());
g_type_class_ref (gst_caps_flags_get_type ());
g_type_class_ref (gst_clock_return_get_type ());
g_type_class_ref (gst_clock_entry_type_get_type ());
g_type_class_ref (gst_clock_flags_get_type ());
g_type_class_ref (gst_clock_type_get_type ());
g_type_class_ref (gst_debug_graph_details_get_type ());
g_type_class_ref (gst_state_get_type ());
g_type_class_ref (gst_state_change_return_get_type ());
g_type_class_ref (gst_state_change_get_type ());
g_type_class_ref (gst_element_flags_get_type ());
g_type_class_ref (gst_core_error_get_type ());
g_type_class_ref (gst_library_error_get_type ());
g_type_class_ref (gst_resource_error_get_type ());
g_type_class_ref (gst_stream_error_get_type ());
g_type_class_ref (gst_event_type_flags_get_type ());
g_type_class_ref (gst_event_type_get_type ());
g_type_class_ref (gst_seek_type_get_type ());
g_type_class_ref (gst_seek_flags_get_type ());
g_type_class_ref (gst_qos_type_get_type ());
g_type_class_ref (gst_format_get_type ());
g_type_class_ref (gst_debug_level_get_type ());
g_type_class_ref (gst_debug_color_flags_get_type ());
g_type_class_ref (gst_iterator_result_get_type ());
g_type_class_ref (gst_iterator_item_get_type ());
g_type_class_ref (gst_message_type_get_type ());
g_type_class_ref (gst_mini_object_flags_get_type ());
g_type_class_ref (gst_pad_link_return_get_type ());
g_type_class_ref (gst_pad_link_check_get_type ());
g_type_class_ref (gst_flow_return_get_type ());
g_type_class_ref (gst_pad_mode_get_type ());
g_type_class_ref (gst_pad_direction_get_type ());
g_type_class_ref (gst_pad_flags_get_type ());
g_type_class_ref (gst_pad_presence_get_type ());
g_type_class_ref (gst_pad_template_flags_get_type ());
g_type_class_ref (gst_pipeline_flags_get_type ());
g_type_class_ref (gst_plugin_error_get_type ());
g_type_class_ref (gst_plugin_flags_get_type ());
g_type_class_ref (gst_plugin_dependency_flags_get_type ());
g_type_class_ref (gst_rank_get_type ());
g_type_class_ref (gst_query_type_get_type ());
g_type_class_ref (gst_buffering_mode_get_type ());
g_type_class_ref (gst_stream_status_type_get_type ());
g_type_class_ref (gst_structure_change_type_get_type ());
g_type_class_ref (gst_tag_merge_mode_get_type ());
g_type_class_ref (gst_tag_flag_get_type ());
g_type_class_ref (gst_task_pool_get_type ());
g_type_class_ref (gst_task_state_get_type ());
g_type_class_ref (gst_alloc_trace_flags_get_type ());
g_type_class_ref (gst_type_find_probability_get_type ());
g_type_class_ref (gst_uri_error_get_type ());
g_type_class_ref (gst_uri_type_get_type ());
g_type_class_ref (gst_parse_error_get_type ());
g_type_class_ref (gst_parse_flags_get_type ());
g_type_class_ref (gst_search_mode_get_type ());
g_type_class_ref (gst_progress_type_get_type ());
g_type_class_ref (gst_buffer_pool_flags_get_type ());
g_type_class_ref (gst_memory_flags_get_type ());
g_type_class_ref (gst_map_flags_get_type ());
g_type_class_ref (gst_caps_intersect_mode_get_type ());
g_type_class_ref (gst_pad_probe_type_get_type ());
g_type_class_ref (gst_pad_probe_return_get_type ());
g_type_class_ref (gst_segment_flags_get_type ());
g_type_class_ref (gst_scheduling_flags_get_type ());
g_type_class_ref (gst_meta_flags_get_type ());
g_type_class_ref (gst_control_binding_get_type ());
g_type_class_ref (gst_control_source_get_type ());
_priv_gst_event_initialize ();
_priv_gst_buffer_initialize ();
_priv_gst_message_initialize ();
_priv_gst_buffer_list_initialize ();
_priv_gst_sample_initialize ();
_priv_gst_value_initialize ();
g_type_class_ref (gst_param_spec_fraction_get_type ());
_priv_gst_tag_initialize ();
gst_parse_context_get_type ();
_priv_gst_plugin_initialize ();
/* register core plugins */
gst_plugin_register_static (GST_VERSION_MAJOR, GST_VERSION_MINOR,
"staticelements", "core elements linked into the GStreamer library",
gst_register_core_elements, VERSION, GST_LICENSE, PACKAGE,
GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
/*
* Any errors happening below this point are non-fatal, we therefore mark
* gstreamer as being initialized, since it is the case from a plugin point of
* view.
*
* If anything fails, it will be put back to FALSE in gst_init_check().
* This allows some special plugins that would call gst_init() to not cause a
* looping effect (i.e. initializing GStreamer twice).
*/
gst_initialized = TRUE;
if (!gst_update_registry ())
return FALSE;
#ifndef GST_DISABLE_TRACE
_gst_trace_on = 0;
if (_gst_trace_on) {
gst_trace = gst_trace_new ("gst.trace", 1024);
gst_trace_set_default (gst_trace);
}
#endif /* GST_DISABLE_TRACE */
GST_INFO ("GLib runtime version: %d.%d.%d", glib_major_version,
glib_minor_version, glib_micro_version);
GST_INFO ("GLib headers version: %d.%d.%d", GLIB_MAJOR_VERSION,
GLIB_MINOR_VERSION, GLIB_MICRO_VERSION);
return TRUE;
}
#ifndef GST_DISABLE_GST_DEBUG
static gboolean
select_all (GstPlugin * plugin, gpointer user_data)
{
return TRUE;
}
static gint
sort_by_category_name (gconstpointer a, gconstpointer b)
{
return strcmp (gst_debug_category_get_name ((GstDebugCategory *) a),
gst_debug_category_get_name ((GstDebugCategory *) b));
}
static void
gst_debug_help (void)
{
GSList *list, *walk;
GList *list2, *g;
/* Need to ensure the registry is loaded to get debug categories */
if (!init_post (NULL, NULL, NULL, NULL))
exit (1);
list2 = gst_registry_plugin_filter (gst_registry_get (),
select_all, FALSE, NULL);
/* FIXME this is gross. why don't debug have categories PluginFeatures? */
for (g = list2; g; g = g_list_next (g)) {
GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
gst_plugin_load (plugin);
}
g_list_free (list2);
list = gst_debug_get_all_categories ();
walk = list = g_slist_sort (list, sort_by_category_name);
g_print ("\n");
g_print ("name level description\n");
g_print ("---------------------+--------+--------------------------------\n");
while (walk) {
GstDebugCategory *cat = (GstDebugCategory *) walk->data;
if (gst_debug_is_colored ()) {
#ifdef G_OS_WIN32
gint color = gst_debug_construct_win_color (cat->color);
const gint clear = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
g_print ("%-20s", gst_debug_category_get_name (cat));
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
g_print (" %1d %s ", gst_debug_category_get_threshold (cat),
gst_debug_level_get_name (gst_debug_category_get_threshold (cat)));
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), color);
g_print ("%s", gst_debug_category_get_description (cat));
SetConsoleTextAttribute (GetStdHandle (STD_OUTPUT_HANDLE), clear);
g_print ("\n");
#else /* G_OS_WIN32 */
gchar *color = gst_debug_construct_term_color (cat->color);
g_print ("%s%-20s\033[00m %1d %s %s%s\033[00m\n",
color,
gst_debug_category_get_name (cat),
gst_debug_category_get_threshold (cat),
gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
color, gst_debug_category_get_description (cat));
g_free (color);
#endif /* G_OS_WIN32 */
} else {
g_print ("%-20s %1d %s %s\n", gst_debug_category_get_name (cat),
gst_debug_category_get_threshold (cat),
gst_debug_level_get_name (gst_debug_category_get_threshold (cat)),
gst_debug_category_get_description (cat));
}
walk = g_slist_next (walk);
}
g_slist_free (list);
g_print ("\n");
}
#endif
#ifndef GST_DISABLE_OPTION_PARSING
static gboolean
parse_one_option (gint opt, const gchar * arg, GError ** err)
{
switch (opt) {
case ARG_VERSION:
g_print ("GStreamer Core Library version %s\n", PACKAGE_VERSION);
exit (0);
case ARG_FATAL_WARNINGS:{
GLogLevelFlags fatal_mask;
fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
g_log_set_always_fatal (fatal_mask);
break;
}
#ifndef GST_DISABLE_GST_DEBUG
case ARG_DEBUG_LEVEL:{
GstDebugLevel tmp = GST_LEVEL_NONE;
tmp = (GstDebugLevel) strtol (arg, NULL, 0);
if (tmp >= 0 && tmp < GST_LEVEL_COUNT) {
gst_debug_set_default_threshold (tmp);
}
break;
}
case ARG_DEBUG:
parse_debug_list (arg);
break;
case ARG_DEBUG_NO_COLOR:
gst_debug_set_colored (FALSE);
break;
case ARG_DEBUG_DISABLE:
gst_debug_set_active (FALSE);
break;
case ARG_DEBUG_HELP:
gst_debug_help ();
exit (0);
#endif
case ARG_PLUGIN_SPEW:
break;
case ARG_PLUGIN_PATH:
#ifndef GST_DISABLE_REGISTRY
split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func, NULL);
#endif /* GST_DISABLE_REGISTRY */
break;
case ARG_PLUGIN_LOAD:
split_and_iterate (arg, ",", prepare_for_load_plugin_func, NULL);
break;
case ARG_SEGTRAP_DISABLE:
_gst_disable_segtrap = TRUE;
break;
case ARG_REGISTRY_UPDATE_DISABLE:
#ifndef GST_DISABLE_REGISTRY
_priv_gst_disable_registry_update = TRUE;
#endif
break;
case ARG_REGISTRY_FORK_DISABLE:
gst_registry_fork_set_enabled (FALSE);
break;
default:
g_set_error (err, G_OPTION_ERROR, G_OPTION_ERROR_UNKNOWN_OPTION,
_("Unknown option"));
return FALSE;
}
return TRUE;
}
static gboolean
parse_goption_arg (const gchar * opt,
const gchar * arg, gpointer data, GError ** err)
{
static const struct
{
const gchar *opt;
int val;
} options[] = {
{
"--gst-version", ARG_VERSION}, {
"--gst-fatal-warnings", ARG_FATAL_WARNINGS},
#ifndef GST_DISABLE_GST_DEBUG
{
"--gst-debug-level", ARG_DEBUG_LEVEL}, {
"--gst-debug", ARG_DEBUG}, {
"--gst-debug-disable", ARG_DEBUG_DISABLE}, {
"--gst-debug-no-color", ARG_DEBUG_NO_COLOR}, {
"--gst-debug-help", ARG_DEBUG_HELP},
#endif
{
"--gst-plugin-spew", ARG_PLUGIN_SPEW}, {
"--gst-plugin-path", ARG_PLUGIN_PATH}, {
"--gst-plugin-load", ARG_PLUGIN_LOAD}, {
"--gst-disable-segtrap", ARG_SEGTRAP_DISABLE}, {
"--gst-disable-registry-update", ARG_REGISTRY_UPDATE_DISABLE}, {
"--gst-disable-registry-fork", ARG_REGISTRY_FORK_DISABLE}, {
NULL}
};
gint val = 0, n;
for (n = 0; options[n].opt; n++) {
if (!strcmp (opt, options[n].opt)) {
val = options[n].val;
break;
}
}
return parse_one_option (val, arg, err);
}
#endif
/**
* gst_deinit:
*
* Clean up any resources created by GStreamer in gst_init().
*
* It is normally not needed to call this function in a normal application
* as the resources will automatically be freed when the program terminates.
* This function is therefore mostly used by testsuites and other memory
* profiling tools.
*
* After this call GStreamer (including this method) should not be used anymore.
*/
void
gst_deinit (void)
{
GstClock *clock;
GST_INFO ("deinitializing GStreamer");
if (gst_deinitialized) {
GST_DEBUG ("already deinitialized");
return;
}
g_slist_foreach (_priv_gst_preload_plugins, (GFunc) g_free, NULL);
g_slist_free (_priv_gst_preload_plugins);
_priv_gst_preload_plugins = NULL;
#ifndef GST_DISABLE_REGISTRY
g_list_foreach (_priv_gst_plugin_paths, (GFunc) g_free, NULL);
g_list_free (_priv_gst_plugin_paths);
_priv_gst_plugin_paths = NULL;
#endif
clock = gst_system_clock_obtain ();
gst_object_unref (clock);
gst_object_unref (clock);
_priv_gst_registry_cleanup ();
g_mutex_clear (&_gst_trace_mutex);
g_type_class_unref (g_type_class_peek (gst_object_get_type ()));
g_type_class_unref (g_type_class_peek (gst_pad_get_type ()));
g_type_class_unref (g_type_class_peek (gst_element_factory_get_type ()));
g_type_class_unref (g_type_class_peek (gst_element_get_type ()));
g_type_class_unref (g_type_class_peek (gst_type_find_factory_get_type ()));
g_type_class_unref (g_type_class_peek (gst_bin_get_type ()));
g_type_class_unref (g_type_class_peek (gst_bus_get_type ()));
g_type_class_unref (g_type_class_peek (gst_task_get_type ()));
g_type_class_unref (g_type_class_peek (gst_object_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_bin_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_buffer_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_buffer_copy_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_bus_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_bus_sync_reply_get_type ()));
g_type_class_unref (g_type_class_peek (gst_caps_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_clock_type_get_type ()));
g_type_class_unref (g_type_class_peek (gst_clock_return_get_type ()));
g_type_class_unref (g_type_class_peek (gst_clock_entry_type_get_type ()));
g_type_class_unref (g_type_class_peek (gst_clock_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_debug_graph_details_get_type ()));
g_type_class_unref (g_type_class_peek (gst_state_get_type ()));
g_type_class_unref (g_type_class_peek (gst_state_change_return_get_type ()));
g_type_class_unref (g_type_class_peek (gst_state_change_get_type ()));
g_type_class_unref (g_type_class_peek (gst_element_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_core_error_get_type ()));
g_type_class_unref (g_type_class_peek (gst_library_error_get_type ()));
g_type_class_unref (g_type_class_peek (gst_plugin_dependency_flags_get_type
()));
g_type_class_unref (g_type_class_peek (gst_parse_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_resource_error_get_type ()));
g_type_class_unref (g_type_class_peek (gst_search_mode_get_type ()));
g_type_class_unref (g_type_class_peek (gst_stream_error_get_type ()));
g_type_class_unref (g_type_class_peek (gst_stream_status_type_get_type ()));
g_type_class_unref (g_type_class_peek (gst_structure_change_type_get_type
()));
g_type_class_unref (g_type_class_peek (gst_event_type_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_event_type_get_type ()));
g_type_class_unref (g_type_class_peek (gst_seek_type_get_type ()));
g_type_class_unref (g_type_class_peek (gst_seek_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_qos_type_get_type ()));
g_type_class_unref (g_type_class_peek (gst_format_get_type ()));
g_type_class_unref (g_type_class_peek (gst_debug_level_get_type ()));
g_type_class_unref (g_type_class_peek (gst_debug_color_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_iterator_result_get_type ()));
g_type_class_unref (g_type_class_peek (gst_iterator_item_get_type ()));
g_type_class_unref (g_type_class_peek (gst_message_type_get_type ()));
g_type_class_unref (g_type_class_peek (gst_meta_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_mini_object_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_pad_link_return_get_type ()));
g_type_class_unref (g_type_class_peek (gst_pad_link_check_get_type ()));
g_type_class_unref (g_type_class_peek (gst_flow_return_get_type ()));
g_type_class_unref (g_type_class_peek (gst_pad_mode_get_type ()));
g_type_class_unref (g_type_class_peek (gst_pad_direction_get_type ()));
g_type_class_unref (g_type_class_peek (gst_pad_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_pad_presence_get_type ()));
g_type_class_unref (g_type_class_peek (gst_pad_template_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_pipeline_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_plugin_error_get_type ()));
g_type_class_unref (g_type_class_peek (gst_plugin_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_rank_get_type ()));
g_type_class_unref (g_type_class_peek (gst_query_type_get_type ()));
g_type_class_unref (g_type_class_peek (gst_buffering_mode_get_type ()));
g_type_class_unref (g_type_class_peek (gst_tag_merge_mode_get_type ()));
g_type_class_unref (g_type_class_peek (gst_tag_flag_get_type ()));
g_type_class_unref (g_type_class_peek (gst_task_state_get_type ()));
g_type_class_unref (g_type_class_peek (gst_alloc_trace_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_type_find_probability_get_type
()));
g_type_class_unref (g_type_class_peek (gst_uri_type_get_type ()));
g_type_class_unref (g_type_class_peek (gst_uri_error_get_type ()));
g_type_class_unref (g_type_class_peek (gst_parse_error_get_type ()));
g_type_class_unref (g_type_class_peek (gst_param_spec_fraction_get_type ()));
g_type_class_unref (g_type_class_peek (gst_progress_type_get_type ()));
g_type_class_unref (g_type_class_peek (gst_buffer_pool_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_memory_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_map_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_caps_intersect_mode_get_type ()));
g_type_class_unref (g_type_class_peek (gst_pad_probe_type_get_type ()));
g_type_class_unref (g_type_class_peek (gst_pad_probe_return_get_type ()));
g_type_class_unref (g_type_class_peek (gst_segment_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_scheduling_flags_get_type ()));
g_type_class_unref (g_type_class_peek (gst_control_binding_get_type ()));
g_type_class_unref (g_type_class_peek (gst_control_source_get_type ()));
gst_deinitialized = TRUE;
GST_INFO ("deinitialized GStreamer");
}
/**
* gst_version:
* @major: (out): pointer to a guint to store the major version number
* @minor: (out): pointer to a guint to store the minor version number
* @micro: (out): pointer to a guint to store the micro version number
* @nano: (out): pointer to a guint to store the nano version number
*
* Gets the version number of the GStreamer library.
*/
void
gst_version (guint * major, guint * minor, guint * micro, guint * nano)
{
g_return_if_fail (major);
g_return_if_fail (minor);
g_return_if_fail (micro);
g_return_if_fail (nano);
*major = GST_VERSION_MAJOR;
*minor = GST_VERSION_MINOR;
*micro = GST_VERSION_MICRO;
*nano = GST_VERSION_NANO;
}
/**
* gst_version_string:
*
* This function returns a string that is useful for describing this version
* of GStreamer to the outside world: user agent strings, logging, ...
*
* Returns: (transfer full): a newly allocated string describing this version
* of GStreamer.
*/
gchar *
gst_version_string (void)
{
guint major, minor, micro, nano;
gst_version (&major, &minor, &micro, &nano);
if (nano == 0)
return g_strdup_printf ("GStreamer %d.%d.%d", major, minor, micro);
else if (nano == 1)
return g_strdup_printf ("GStreamer %d.%d.%d (GIT)", major, minor, micro);
else
return g_strdup_printf ("GStreamer %d.%d.%d (prerelease)", major, minor,
micro);
}
/**
* gst_segtrap_is_enabled:
*
* Some functions in the GStreamer core might install a custom SIGSEGV handler
* to better catch and report errors to the application. Currently this feature
* is enabled by default when loading plugins.
*
* Applications might want to disable this behaviour with the
* gst_segtrap_set_enabled() function. This is typically done if the application
* wants to install its own handler without GStreamer interfering.
*
* Returns: %TRUE if GStreamer is allowed to install a custom SIGSEGV handler.
*
* Since: 0.10.10
*/
gboolean
gst_segtrap_is_enabled (void)
{
/* yeps, it's enabled when it's not disabled */
return !_gst_disable_segtrap;
}
/**
* gst_segtrap_set_enabled:
* @enabled: whether a custom SIGSEGV handler should be installed.
*
* Applications might want to disable/enable the SIGSEGV handling of
* the GStreamer core. See gst_segtrap_is_enabled() for more information.
*
* Since: 0.10.10
*/
void
gst_segtrap_set_enabled (gboolean enabled)
{
_gst_disable_segtrap = !enabled;
}
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