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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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505f3889ca
Original commit message from CVS: * docs/gst/gstreamer-sections.txt: * gst/Makefile.am: * gst/gst.c: * gst/gst.h: * gst/gstparamspecs.c: (_gst_param_fraction_init), (_gst_param_fraction_set_default), (_gst_param_fraction_validate), (_gst_param_fraction_values_cmp), (gst_param_spec_fraction_get_type), (gst_param_spec_fraction): * gst/gstparamspecs.h: * gst/gstvalue.c: * tests/check/Makefile.am: * tests/check/gst/.cvsignore: * tests/check/gst/gstparamspecs.c: (gst_dummy_obj_base_init), (gst_dummy_obj_class_init), (gst_dummy_obj_init), (gst_dummy_obj_set_property), (gst_dummy_obj_get_property), (GST_START_TEST), (gst_param_spec_suite): API: add GstParamSpecFraction, so elements can have fraction properties without lots of painful string parsing (#444648).
1404 lines
40 KiB
C
1404 lines
40 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gst.c: Initialization and non-pipeline operations
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:gst
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* @short_description: Media library supporting arbitrary formats and filter
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* graphs.
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* @see_also: Check out both <ulink url="http://www.cse.ogi.edu/sysl/">OGI's
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* pipeline</ulink> and Microsoft's DirectShow for some background.
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*
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* GStreamer is a framework for constructing graphs of various filters
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* (termed elements here) that will handle streaming media. Any discreet
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* (packetizable) media type is supported, with provisions for automatically
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* determining source type. Formatting/framing information is provided with
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* a powerful negotiation framework. Plugins are heavily used to provide for
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* all elements, allowing one to construct plugins outside of the GST
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* library, even released binary-only if license require (please don't).
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*
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* GStreamer borrows heavily from both the <ulink
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* url="http://www.cse.ogi.edu/sysl/">OGI media pipeline</ulink> and
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* Microsoft's DirectShow, hopefully taking the best of both and leaving the
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* cruft behind. Its interface is slowly getting stable.
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*
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* The <application>GStreamer</application> library should be initialized with
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* gst_init() before it can be used. You should pass pointers to the main argc
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* and argv variables so that GStreamer can process its own command line
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* options, as shown in the following example.
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*
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* <example>
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* <title>Initializing the gstreamer library</title>
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* <programlisting language="c">
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* int
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* main (int argc, char *argv[])
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* {
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* // initialize the GStreamer library
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* gst_init (&argc, &argv);
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* ...
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* }
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* </programlisting>
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* </example>
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*
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* It's allowed to pass two NULL pointers to gst_init() in case you don't want
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* to pass the command line args to GStreamer.
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*
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* You can also use GOption to initialize your own parameters as shown in
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* the next code fragment:
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* <example>
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* <title>Initializing own parameters when initializing gstreamer</title>
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* <programlisting>
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* static gboolean stats = FALSE;
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* ...
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* int
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* main (int argc, char *argv[])
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* {
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* GOptionEntry options[] = {
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* {"tags", 't', 0, G_OPTION_ARG_NONE, &tags,
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* N_("Output tags (also known as metadata)"), NULL},
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* {NULL}
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* };
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* // must initialise the threading system before using any other GLib funtion
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* if (!g_thread_supported ())
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* g_thread_init (NULL);
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* ctx = g_option_context_new ("[ADDITIONAL ARGUMENTS]");
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* g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
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* g_option_context_add_group (ctx, gst_init_get_option_group ());
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* if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
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* g_print ("Error initializing: %s\n", GST_STR_NULL (err->message));
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* exit (1);
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* }
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* g_option_context_free (ctx);
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* ...
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* }
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* </programlisting>
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* </example>
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*
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* Use gst_version() to query the library version at runtime or use the
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* GST_VERSION_* macros to find the version at compile time. Optionally
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* gst_version_string() returns a printable string.
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*
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* The gst_deinit() call is used to clean up all internal resources used
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* by <application>GStreamer</application>. It is mostly used in unit tests
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* to check for leaks.
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*
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* Last reviewed on 2006-08-11 (0.10.10)
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*/
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#include "gst_private.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <sys/types.h>
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#ifdef HAVE_FORK
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#include <sys/wait.h>
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#endif /* HAVE_FORK */
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#ifdef HAVE_SYS_UTSNAME_H
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#include <sys/utsname.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "gst-i18n-lib.h"
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#include <locale.h> /* for LC_ALL */
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#include "gst.h"
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#define GST_CAT_DEFAULT GST_CAT_GST_INIT
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#define MAX_PATH_SPLIT 16
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#define GST_PLUGIN_SEPARATOR ","
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static gboolean gst_initialized = FALSE;
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#ifndef GST_DISABLE_REGISTRY
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static GList *plugin_paths = NULL; /* for delayed processing in post_init */
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#endif
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extern gint _gst_trace_on;
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/* defaults */
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#ifdef HAVE_FORK
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#define DEFAULT_FORK TRUE
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#else
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#define DEFAULT_FORK FALSE
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#endif /* HAVE_FORK */
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/* set to TRUE when segfaults need to be left as is, FIXME, this variable is
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* global. */
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gboolean _gst_disable_segtrap = FALSE;
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/* control the behaviour of registry rebuild */
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static gboolean _gst_enable_registry_fork = DEFAULT_FORK;
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static void load_plugin_func (gpointer data, gpointer user_data);
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static gboolean init_pre (GOptionContext * context, GOptionGroup * group,
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gpointer data, GError ** error);
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static gboolean init_post (GOptionContext * context, GOptionGroup * group,
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gpointer data, GError ** error);
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#ifndef GST_DISABLE_OPTION_PARSING
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static gboolean parse_goption_arg (const gchar * s_opt,
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const gchar * arg, gpointer data, GError ** err);
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#endif
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static GSList *preload_plugins = NULL;
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const gchar g_log_domain_gstreamer[] = "GStreamer";
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static void
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debug_log_handler (const gchar * log_domain,
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GLogLevelFlags log_level, const gchar * message, gpointer user_data)
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{
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g_log_default_handler (log_domain, log_level, message, user_data);
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/* FIXME: do we still need this ? fatal errors these days are all
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* other than core errors */
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/* g_on_error_query (NULL); */
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}
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enum
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{
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ARG_VERSION = 1,
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ARG_FATAL_WARNINGS,
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#ifndef GST_DISABLE_GST_DEBUG
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ARG_DEBUG_LEVEL,
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ARG_DEBUG,
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ARG_DEBUG_DISABLE,
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ARG_DEBUG_NO_COLOR,
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ARG_DEBUG_HELP,
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#endif
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ARG_PLUGIN_SPEW,
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ARG_PLUGIN_PATH,
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ARG_PLUGIN_LOAD,
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ARG_SEGTRAP_DISABLE,
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ARG_REGISTRY_FORK_DISABLE
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};
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/* debug-spec ::= category-spec [, category-spec]*
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* category-spec ::= category:val | val
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* category ::= [^:]+
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* val ::= [0-5]
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*/
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#ifndef NUL
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#define NUL '\0'
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#endif
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#ifndef GST_DISABLE_GST_DEBUG
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static gboolean
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parse_debug_category (gchar * str, const gchar ** category)
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{
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if (!str)
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return FALSE;
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/* works in place */
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g_strstrip (str);
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if (str[0] != NUL) {
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*category = str;
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return TRUE;
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}
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return FALSE;
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}
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static gboolean
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parse_debug_level (gchar * str, gint * level)
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{
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if (!str)
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return FALSE;
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/* works in place */
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g_strstrip (str);
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if (str[0] != NUL && str[1] == NUL
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&& str[0] >= '0' && str[0] < '0' + GST_LEVEL_COUNT) {
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*level = str[0] - '0';
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return TRUE;
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}
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return FALSE;
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}
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static void
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parse_debug_list (const gchar * list)
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{
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gchar **split;
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gchar **walk;
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g_return_if_fail (list != NULL);
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split = g_strsplit (list, ",", 0);
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for (walk = split; *walk; walk++) {
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if (strchr (*walk, ':')) {
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gchar **values = g_strsplit (*walk, ":", 2);
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if (values[0] && values[1]) {
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gint level;
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const gchar *category;
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if (parse_debug_category (values[0], &category)
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&& parse_debug_level (values[1], &level))
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gst_debug_set_threshold_for_name (category, level);
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}
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g_strfreev (values);
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} else {
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gint level;
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if (parse_debug_level (*walk, &level))
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gst_debug_set_default_threshold (level);
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}
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}
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g_strfreev (split);
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}
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#endif
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/**
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* gst_init_get_option_group:
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*
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* Returns a #GOptionGroup with GStreamer's argument specifications. The
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* group is set up to use standard GOption callbacks, so when using this
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* group in combination with GOption parsing methods, all argument parsing
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* and initialization is automated.
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*
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* This function is useful if you want to integrate GStreamer with other
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* libraries that use GOption (see g_option_context_add_group() ).
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*
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* If you use this function, you should make sure you initialise the GLib
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* threading system as one of the very first things in your program
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* (see the example at the beginning of this section).
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*
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* Returns: a pointer to GStreamer's option group.
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*/
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GOptionGroup *
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gst_init_get_option_group (void)
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{
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#ifndef GST_DISABLE_OPTION_PARSING
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GOptionGroup *group;
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const static GOptionEntry gst_args[] = {
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{"gst-version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg, N_("Print the GStreamer version"), NULL},
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{"gst-fatal-warnings", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg, N_("Make all warnings fatal"), NULL},
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#ifndef GST_DISABLE_GST_DEBUG
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{"gst-debug-help", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg,
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N_("Print available debug categories and exit"),
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NULL},
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{"gst-debug-level", 0, 0, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg,
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N_("Default debug level from 1 (only error) to 5 (anything) or "
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"0 for no output"),
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N_("LEVEL")},
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{"gst-debug", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) parse_goption_arg,
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N_("Comma-separated list of category_name:level pairs to set "
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"specific levels for the individual categories. Example: "
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"GST_AUTOPLUG:5,GST_ELEMENT_*:3"),
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N_("LIST")},
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{"gst-debug-no-color", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg, N_("Disable colored debugging output"),
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NULL},
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{"gst-debug-disable", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg, N_("Disable debugging"), NULL},
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#endif
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{"gst-plugin-spew", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg,
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N_("Enable verbose plugin loading diagnostics"),
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NULL},
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{"gst-plugin-path", 0, 0, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg,
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N_("Colon-separated paths containing plugins"), N_("PATHS")},
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{"gst-plugin-load", 0, 0, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg,
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N_("Comma-separated list of plugins to preload in addition to the "
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"list stored in environment variable GST_PLUGIN_PATH"),
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N_("PLUGINS")},
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{"gst-disable-segtrap", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg,
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N_("Disable trapping of segmentation faults during plugin loading"),
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NULL},
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{"gst-disable-registry-fork", 0, G_OPTION_FLAG_NO_ARG,
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G_OPTION_ARG_CALLBACK,
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(gpointer) parse_goption_arg,
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N_("Disable the use of fork() while scanning the registry"),
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NULL},
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{NULL}
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};
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/* The GLib threading system must be initialised before calling any other
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* GLib function according to the documentation; if the application hasn't
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* called gst_init() yet or initialised the threading system otherwise, we
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* better issue a warning here (since chances are high that the application
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* has already called other GLib functions such as g_option_context_new() */
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if (!g_thread_supported ()) {
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g_warning ("The GStreamer function gst_init_get_option_group() was\n"
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"\tcalled, but the GLib threading system has not been initialised\n"
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"\tyet, something that must happen before any other GLib function\n"
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"\tis called. The application needs to be fixed so that it calls\n"
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"\t if (!g_thread_supported ()) g_thread_init(NULL);\n"
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"\tas very first thing in its main() function. Please file a bug\n"
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"\tagainst this application.");
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g_thread_init (NULL);
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}
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group = g_option_group_new ("gst", _("GStreamer Options"),
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_("Show GStreamer Options"), NULL, NULL);
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g_option_group_set_parse_hooks (group, (GOptionParseFunc) init_pre,
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(GOptionParseFunc) init_post);
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g_option_group_add_entries (group, gst_args);
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g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
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return group;
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#else
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return NULL;
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#endif
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}
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/**
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* gst_init_check:
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* @argc: pointer to application's argc
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* @argv: pointer to application's argv
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* @err: pointer to a #GError to which a message will be posted on error
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*
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* Initializes the GStreamer library, setting up internal path lists,
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* registering built-in elements, and loading standard plugins.
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*
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* This function will return %FALSE if GStreamer could not be initialized
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* for some reason. If you want your program to fail fatally,
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* use gst_init() instead.
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*
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* This function should be called before calling any other GLib functions. If
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* this is not an option, your program must initialise the GLib thread system
|
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* using g_thread_init() before any other GLib functions are called.
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*
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* Returns: %TRUE if GStreamer could be initialized.
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*/
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gboolean
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gst_init_check (int *argc, char **argv[], GError ** err)
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{
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#ifndef GST_DISABLE_OPTION_PARSING
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GOptionGroup *group;
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GOptionContext *ctx;
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#endif
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gboolean res;
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if (!g_thread_supported ())
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g_thread_init (NULL);
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GST_INFO ("initializing GStreamer");
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if (gst_initialized) {
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GST_DEBUG ("already initialized gst");
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return TRUE;
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}
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#ifndef GST_DISABLE_OPTION_PARSING
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ctx = g_option_context_new ("- GStreamer initialization");
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g_option_context_set_ignore_unknown_options (ctx, TRUE);
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group = gst_init_get_option_group ();
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g_option_context_add_group (ctx, group);
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res = g_option_context_parse (ctx, argc, argv, err);
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g_option_context_free (ctx);
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#else
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init_pre (NULL, NULL, NULL, NULL);
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init_post (NULL, NULL, NULL, NULL);
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res = TRUE;
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#endif
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gst_initialized = res;
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if (res) {
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GST_INFO ("initialized GStreamer successfully");
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} else {
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GST_INFO ("failed to initialize GStreamer");
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}
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return res;
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}
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|
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/**
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|
* gst_init:
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* @argc: pointer to application's argc
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* @argv: pointer to application's argv
|
|
*
|
|
* Initializes the GStreamer library, setting up internal path lists,
|
|
* registering built-in elements, and loading standard plugins.
|
|
*
|
|
* This function should be called before calling any other GLib functions. If
|
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* this is not an option, your program must initialise the GLib thread system
|
|
* using g_thread_init() before any other GLib functions are called.
|
|
*
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|
* <note><para>
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|
* This function will terminate your program if it was unable to initialize
|
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* GStreamer for some reason. If you want your program to fall back,
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* use gst_init_check() instead.
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|
* </para></note>
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|
*
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|
* WARNING: This function does not work in the same way as corresponding
|
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* functions in other glib-style libraries, such as gtk_init(). In
|
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* particular, unknown command line options cause this function to
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* abort program execution.
|
|
*/
|
|
void
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|
gst_init (int *argc, char **argv[])
|
|
{
|
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GError *err = NULL;
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|
|
if (!gst_init_check (argc, argv, &err)) {
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g_print ("Could not initialize GStreamer: %s\n",
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|
err ? err->message : "unknown error occurred");
|
|
if (err) {
|
|
g_error_free (err);
|
|
}
|
|
exit (1);
|
|
}
|
|
}
|
|
|
|
#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);
|
|
plugin_paths = g_list_append (plugin_paths, g_strdup (data));
|
|
}
|
|
#endif
|
|
|
|
#ifndef GST_DISABLE_OPTION_PARSING
|
|
static void
|
|
prepare_for_load_plugin_func (gpointer data, gpointer user_data)
|
|
{
|
|
preload_plugins = g_slist_prepend (preload_plugins, g_strdup (data));
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
load_plugin_func (gpointer data, gpointer user_data)
|
|
{
|
|
GstPlugin *plugin;
|
|
const gchar *filename;
|
|
GError *err = NULL;
|
|
|
|
filename = (const gchar *) data;
|
|
|
|
plugin = gst_plugin_load_file (filename, &err);
|
|
|
|
if (plugin) {
|
|
GST_INFO ("Loaded plugin: \"%s\"", filename);
|
|
|
|
gst_default_registry_add_plugin (plugin);
|
|
} else {
|
|
if (err) {
|
|
/* Report error to user, and free error */
|
|
GST_ERROR ("Failed to load plugin: %s", err->message);
|
|
g_error_free (err);
|
|
} else {
|
|
GST_WARNING ("Failed to load plugin: \"%s\"", filename);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifndef GST_DISABLE_OPTION_PARSING
|
|
static void
|
|
split_and_iterate (const gchar * stringlist, 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;
|
|
}
|
|
|
|
/* GStreamer was built against a GLib >= 2.8 and is therefore not doing
|
|
* the refcount hack. Check that it isn't being run against an older GLib */
|
|
if (glib_major_version < 2 ||
|
|
(glib_major_version == 2 && glib_minor_version < 8)) {
|
|
g_warning ("GStreamer was compiled against GLib %d.%d.%d but is running"
|
|
" against %d.%d.%d. This will cause reference counting issues",
|
|
GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION,
|
|
glib_major_version, glib_minor_version, glib_micro_version);
|
|
}
|
|
|
|
g_type_init ();
|
|
|
|
/* we need threading to be enabled right here */
|
|
g_assert (g_thread_supported ());
|
|
_gst_debug_init ();
|
|
|
|
#ifdef ENABLE_NLS
|
|
setlocale (LC_ALL, "");
|
|
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
|
|
#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);
|
|
}
|
|
}
|
|
#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;
|
|
}
|
|
|
|
static GstPluginDesc plugin_desc = {
|
|
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,
|
|
|
|
GST_PADDING_INIT
|
|
};
|
|
|
|
#ifndef GST_DISABLE_REGISTRY
|
|
|
|
/*
|
|
* scan_and_update_registry:
|
|
* @default_registry: the #GstRegistry
|
|
* @registry_file: registry filename
|
|
* @write_changes: write registry if it has changed?
|
|
*
|
|
* Scans for registry changes and eventually updates the registry cache.
|
|
*
|
|
* Return: %TRUE if the registry could be updated
|
|
*/
|
|
static gboolean
|
|
scan_and_update_registry (GstRegistry * default_registry,
|
|
const gchar * registry_file, gboolean write_changes, GError ** error)
|
|
{
|
|
const gchar *plugin_path;
|
|
gboolean changed = FALSE;
|
|
GList *l;
|
|
|
|
GST_DEBUG ("reading registry cache: %s", registry_file);
|
|
#ifdef USE_BINARY_REGISTRY
|
|
gst_registry_binary_read_cache (default_registry, registry_file);
|
|
#else
|
|
gst_registry_xml_read_cache (default_registry, registry_file);
|
|
#endif
|
|
/* scan paths specified via --gst-plugin-path */
|
|
GST_DEBUG ("scanning paths added via --gst-plugin-path");
|
|
for (l = plugin_paths; l != NULL; l = l->next) {
|
|
GST_INFO ("Scanning plugin path: \"%s\"", (gchar *) l->data);
|
|
/* CHECKME: add changed |= here as well? */
|
|
gst_registry_scan_path (default_registry, (gchar *) l->data);
|
|
}
|
|
/* keep plugin_paths around in case a re-scan is forced later on */
|
|
|
|
/* GST_PLUGIN_PATH specifies a list of directories to scan for
|
|
* additional plugins. These take precedence over the system plugins */
|
|
plugin_path = g_getenv ("GST_PLUGIN_PATH");
|
|
if (plugin_path) {
|
|
char **list;
|
|
int i;
|
|
|
|
GST_DEBUG ("GST_PLUGIN_PATH set to %s", plugin_path);
|
|
list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
|
|
for (i = 0; list[i]; i++) {
|
|
changed |= gst_registry_scan_path (default_registry, list[i]);
|
|
}
|
|
g_strfreev (list);
|
|
} else {
|
|
GST_DEBUG ("GST_PLUGIN_PATH not set");
|
|
}
|
|
|
|
/* GST_PLUGIN_SYSTEM_PATH specifies a list of plugins that are always
|
|
* loaded by default. If not set, this defaults to the system-installed
|
|
* path, and the plugins installed in the user's home directory */
|
|
plugin_path = g_getenv ("GST_PLUGIN_SYSTEM_PATH");
|
|
if (plugin_path == NULL) {
|
|
char *home_plugins;
|
|
|
|
GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH not set");
|
|
|
|
/* plugins in the user's home directory take precedence over
|
|
* system-installed ones */
|
|
home_plugins = g_build_filename (g_get_home_dir (),
|
|
".gstreamer-" GST_MAJORMINOR, "plugins", NULL);
|
|
changed |= gst_registry_scan_path (default_registry, home_plugins);
|
|
g_free (home_plugins);
|
|
|
|
/* add the main (installed) library path */
|
|
changed |= gst_registry_scan_path (default_registry, PLUGINDIR);
|
|
} else {
|
|
gchar **list;
|
|
gint i;
|
|
|
|
GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path);
|
|
list = g_strsplit (plugin_path, G_SEARCHPATH_SEPARATOR_S, 0);
|
|
for (i = 0; list[i]; i++) {
|
|
changed |= gst_registry_scan_path (default_registry, list[i]);
|
|
}
|
|
g_strfreev (list);
|
|
}
|
|
|
|
/* Remove cached plugins so stale info is cleared. */
|
|
changed |= _priv_gst_registry_remove_cache_plugins (default_registry);
|
|
|
|
if (!changed) {
|
|
GST_INFO ("Registry cache has not changed");
|
|
return TRUE;
|
|
}
|
|
|
|
if (!write_changes) {
|
|
GST_INFO ("Registry cached changed, but writing is disabled. Not writing.");
|
|
return TRUE;
|
|
}
|
|
|
|
GST_INFO ("Registry cache changed. Writing new registry cache");
|
|
#ifdef USE_BINARY_REGISTRY
|
|
if (!gst_registry_binary_write_cache (default_registry, registry_file)) {
|
|
#else
|
|
if (!gst_registry_xml_write_cache (default_registry, registry_file)) {
|
|
#endif
|
|
g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
|
|
_("Error writing registry cache to %s: %s"),
|
|
registry_file, g_strerror (errno));
|
|
return FALSE;
|
|
}
|
|
|
|
GST_INFO ("Registry cache written successfully");
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
ensure_current_registry_nonforking (GstRegistry * default_registry,
|
|
const gchar * registry_file, GError ** error)
|
|
{
|
|
/* fork() not available */
|
|
GST_DEBUG ("Updating registry cache in-process");
|
|
scan_and_update_registry (default_registry, registry_file, TRUE, error);
|
|
return TRUE;
|
|
}
|
|
|
|
/* when forking is not available this function always does nothing but return
|
|
* TRUE immediatly */
|
|
static gboolean
|
|
ensure_current_registry_forking (GstRegistry * default_registry,
|
|
const gchar * registry_file, GError ** error)
|
|
{
|
|
#ifdef HAVE_FORK
|
|
pid_t pid;
|
|
int pfd[2];
|
|
int ret;
|
|
|
|
/* We fork here, and let the child read and possibly rebuild the registry.
|
|
* After that, the parent will re-read the freshly generated registry. */
|
|
GST_DEBUG ("forking to update registry");
|
|
|
|
if (pipe (pfd) == -1) {
|
|
g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
|
|
_("Error re-scanning registry %s: %s"),
|
|
", could not create pipes. Error", g_strerror (errno));
|
|
return FALSE;
|
|
}
|
|
|
|
pid = fork ();
|
|
if (pid == -1) {
|
|
GST_ERROR ("Failed to fork()");
|
|
g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
|
|
_("Error re-scanning registry %s: %s"),
|
|
", failed to fork. Error", g_strerror (errno));
|
|
return FALSE;
|
|
}
|
|
|
|
if (pid == 0) {
|
|
gboolean res;
|
|
gchar res_byte;
|
|
|
|
/* this is the child. Close the read pipe */
|
|
(void) close (pfd[0]);
|
|
|
|
GST_DEBUG ("child reading registry cache");
|
|
res =
|
|
scan_and_update_registry (default_registry, registry_file, TRUE, NULL);
|
|
|
|
/* need to use _exit, so that any exit handlers registered don't
|
|
* bring down the main program */
|
|
GST_DEBUG ("child exiting: %s", (res) ? "SUCCESS" : "FAILURE");
|
|
|
|
/* make valgrind happy (yes, you can call it insane) */
|
|
g_free ((char *) registry_file);
|
|
|
|
/* write a result byte to the pipe */
|
|
res_byte = res ? '1' : '0';
|
|
do {
|
|
ret = write (pfd[1], &res_byte, 1);
|
|
} while (ret == -1 && errno == EINTR);
|
|
/* if ret == -1 now, we could not write to pipe, probably
|
|
* means parent has exited before us */
|
|
(void) close (pfd[1]);
|
|
|
|
_exit (0);
|
|
} else {
|
|
gchar res_byte;
|
|
|
|
/* parent. Close write pipe */
|
|
(void) close (pfd[1]);
|
|
|
|
/* Wait for result from the pipe */
|
|
GST_DEBUG ("Waiting for data from child");
|
|
do {
|
|
ret = read (pfd[0], &res_byte, 1);
|
|
} while (ret == -1 && errno == EINTR);
|
|
|
|
if (ret == -1) {
|
|
g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
|
|
_("Error re-scanning registry %s: %s"),
|
|
", read returned error", g_strerror (errno));
|
|
close (pfd[0]);
|
|
return FALSE;
|
|
}
|
|
(void) close (pfd[0]);
|
|
|
|
/* Wait to ensure the child is reaped, but ignore the result */
|
|
GST_DEBUG ("parent waiting on child");
|
|
waitpid (pid, NULL, 0);
|
|
GST_DEBUG ("parent done waiting on child");
|
|
|
|
if (ret == 0) {
|
|
GST_ERROR ("child did not exit normally, terminated by signal");
|
|
g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
|
|
_("Error re-scanning registry %s"), ", child terminated by signal");
|
|
return FALSE;
|
|
}
|
|
|
|
if (res_byte == '1') {
|
|
GST_DEBUG ("Child succeeded. Parent reading registry cache");
|
|
#ifdef USE_BINARY_REGISTRY
|
|
gst_registry_binary_read_cache (default_registry, registry_file);
|
|
#else
|
|
gst_registry_xml_read_cache (default_registry, registry_file);
|
|
#endif
|
|
} else {
|
|
GST_DEBUG ("Child failed. Parent re-scanning registry, ignoring errors.");
|
|
scan_and_update_registry (default_registry, registry_file, FALSE, NULL);
|
|
}
|
|
}
|
|
#endif /* HAVE_FORK */
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
ensure_current_registry (GError ** error)
|
|
{
|
|
char *registry_file;
|
|
GstRegistry *default_registry;
|
|
gboolean ret;
|
|
gboolean do_fork;
|
|
|
|
default_registry = gst_registry_get_default ();
|
|
registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
|
|
if (registry_file == NULL) {
|
|
#ifdef USE_BINARY_REGISTRY
|
|
registry_file = g_build_filename (g_get_home_dir (),
|
|
".gstreamer-" GST_MAJORMINOR, "registry." HOST_CPU ".bin", NULL);
|
|
#else
|
|
registry_file = g_build_filename (g_get_home_dir (),
|
|
".gstreamer-" GST_MAJORMINOR, "registry." HOST_CPU ".xml", NULL);
|
|
#endif
|
|
}
|
|
|
|
/* first see if forking is enabled */
|
|
do_fork = _gst_enable_registry_fork;
|
|
if (do_fork) {
|
|
const gchar *fork_env;
|
|
|
|
/* forking enabled, see if it is disabled with an env var */
|
|
if ((fork_env = g_getenv ("GST_REGISTRY_FORK"))) {
|
|
/* fork enabled for any value different from "no" */
|
|
do_fork = strcmp (fork_env, "no") != 0;
|
|
}
|
|
}
|
|
|
|
/* now check registry with or without forking */
|
|
if (do_fork) {
|
|
GST_DEBUG ("forking for registry rebuild");
|
|
ret = ensure_current_registry_forking (default_registry, registry_file,
|
|
error);
|
|
} else {
|
|
GST_DEBUG ("requested not to fork for registry rebuild");
|
|
ret = ensure_current_registry_nonforking (default_registry, registry_file,
|
|
error);
|
|
}
|
|
|
|
g_free (registry_file);
|
|
|
|
return ret;
|
|
}
|
|
#endif /* GST_DISABLE_REGISTRY */
|
|
|
|
/*
|
|
* 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 ();
|
|
_gst_format_initialize ();
|
|
_gst_query_initialize ();
|
|
gst_object_get_type ();
|
|
gst_pad_get_type ();
|
|
gst_element_factory_get_type ();
|
|
gst_element_get_type ();
|
|
gst_type_find_factory_get_type ();
|
|
gst_bin_get_type ();
|
|
|
|
#ifndef GST_DISABLE_INDEX
|
|
gst_index_factory_get_type ();
|
|
#endif /* GST_DISABLE_INDEX */
|
|
#ifndef GST_DISABLE_URI
|
|
gst_uri_handler_get_type ();
|
|
#endif /* GST_DISABLE_URI */
|
|
|
|
gst_structure_get_type ();
|
|
_gst_value_initialize ();
|
|
gst_param_spec_fraction_get_type ();
|
|
gst_caps_get_type ();
|
|
_gst_event_initialize ();
|
|
_gst_buffer_initialize ();
|
|
_gst_message_initialize ();
|
|
_gst_tag_initialize ();
|
|
|
|
/* register core plugins */
|
|
_gst_plugin_register_static (&plugin_desc);
|
|
|
|
_gst_plugin_initialize ();
|
|
|
|
/*
|
|
* 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;
|
|
|
|
#ifndef GST_DISABLE_REGISTRY
|
|
if (!ensure_current_registry (error))
|
|
return FALSE;
|
|
#endif /* GST_DISABLE_REGISTRY */
|
|
|
|
/* if we need to preload plugins, do so now */
|
|
g_slist_foreach (preload_plugins, load_plugin_func, NULL);
|
|
/* keep preload_plugins around in case a re-scan is forced later on */
|
|
|
|
#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 */
|
|
|
|
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_default (),
|
|
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 ()) {
|
|
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);
|
|
} 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:{
|
|
gint tmp = 0;
|
|
|
|
tmp = 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_FORK_DISABLE:
|
|
_gst_enable_registry_fork = 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
|
|
{
|
|
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-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
|
|
|
|
extern GstRegistry *_gst_registry_default;
|
|
|
|
/**
|
|
* 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_initialized) {
|
|
GST_DEBUG ("already deinitialized");
|
|
return;
|
|
}
|
|
|
|
g_slist_foreach (preload_plugins, (GFunc) g_free, NULL);
|
|
g_slist_free (preload_plugins);
|
|
preload_plugins = NULL;
|
|
|
|
#ifndef GST_DISABLE_REGISTRY
|
|
g_list_foreach (plugin_paths, (GFunc) g_free, NULL);
|
|
g_list_free (plugin_paths);
|
|
plugin_paths = NULL;
|
|
#endif
|
|
|
|
clock = gst_system_clock_obtain ();
|
|
gst_object_unref (clock);
|
|
gst_object_unref (clock);
|
|
|
|
_priv_gst_registry_cleanup ();
|
|
|
|
gst_initialized = FALSE;
|
|
GST_INFO ("deinitialized GStreamer");
|
|
}
|
|
|
|
/**
|
|
* gst_version:
|
|
* @major: pointer to a guint to store the major version number
|
|
* @minor: pointer to a guint to store the minor version number
|
|
* @micro: pointer to a guint to store the micro version number
|
|
* @nano: 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: a newly allocated string describing this version of GStreamer.
|
|
*/
|
|
|
|
gchar *
|
|
gst_version_string ()
|
|
{
|
|
guint major, minor, micro, nano;
|
|
|
|
gst_version (&major, &minor, µ, &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 (CVS)", 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;
|
|
}
|
|
|
|
/**
|
|
* gst_registry_fork_is_enabled:
|
|
*
|
|
* By default GStreamer will perform a fork() when scanning and rebuilding the
|
|
* registry file.
|
|
*
|
|
* Applications might want to disable this behaviour with the
|
|
* gst_registry_fork_set_enabled() function.
|
|
*
|
|
* Returns: %TRUE if GStreamer will use fork() when rebuilding the registry. On
|
|
* platforms without fork(), this function will always return %FALSE.
|
|
*
|
|
* Since: 0.10.10
|
|
*/
|
|
gboolean
|
|
gst_registry_fork_is_enabled (void)
|
|
{
|
|
return _gst_enable_registry_fork;
|
|
}
|
|
|
|
/**
|
|
* gst_registry_fork_set_enabled:
|
|
* @enabled: whether rebuilding the registry may fork
|
|
*
|
|
* Applications might want to disable/enable the usage of fork() when rebuilding
|
|
* the registry. See gst_registry_fork_is_enabled() for more information.
|
|
*
|
|
* On platforms without fork(), this function will have no effect on the return
|
|
* value of gst_registry_fork_is_enabled().
|
|
*
|
|
* Since: 0.10.10
|
|
*/
|
|
void
|
|
gst_registry_fork_set_enabled (gboolean enabled)
|
|
{
|
|
#ifdef HAVE_FORK
|
|
_gst_enable_registry_fork = enabled;
|
|
#endif /* HAVE_FORK */
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_update_registry:
|
|
*
|
|
* Forces GStreamer to re-scan its plugin paths and update the default
|
|
* plugin registry.
|
|
*
|
|
* Applications will almost never need to call this function, it is only
|
|
* useful if the application knows new plugins have been installed (or old
|
|
* ones removed) since the start of the application (or, to be precise, the
|
|
* first call to gst_init()) and the application wants to make use of any
|
|
* newly-installed plugins without restarting the application.
|
|
*
|
|
* Applications should assume that the registry update is neither atomic nor
|
|
* thread-safe and should therefore not have any dynamic pipelines running
|
|
* (including the playbin and decodebin elements) and should also not create
|
|
* any elements or access the GStreamer registry while the update is in
|
|
* progress.
|
|
*
|
|
* Note that this function may block for a significant amount of time.
|
|
*
|
|
* Returns: %TRUE if the registry has been updated successfully (does not
|
|
* imply that there were changes), otherwise %FALSE.
|
|
*
|
|
* Since: 0.10.12
|
|
*/
|
|
gboolean
|
|
gst_update_registry (void)
|
|
{
|
|
gboolean res = FALSE;
|
|
|
|
#ifndef GST_DISABLE_REGISTRY
|
|
GError *err = NULL;
|
|
|
|
res = ensure_current_registry (&err);
|
|
if (err) {
|
|
GST_WARNING ("registry update failed: %s", err->message);
|
|
g_error_free (err);
|
|
} else {
|
|
GST_LOG ("registry update succeeded");
|
|
}
|
|
|
|
if (preload_plugins) {
|
|
g_slist_foreach (preload_plugins, load_plugin_func, NULL);
|
|
}
|
|
#else
|
|
GST_WARNING ("registry update failed: %s", "registry disabled");
|
|
#endif /* GST_DISABLE_REGISTRY */
|
|
|
|
return res;
|
|
}
|