mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-05 16:06:43 +00:00
b611c4e0af
Add the zero-clause BSD license, which is an alteration of the ISC license, to the list of valid licenses.
1938 lines
58 KiB
C
1938 lines
58 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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* gstplugin.c: Plugin subsystem for loading elements, types, and libs
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gstplugin
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* @title: GstPlugin
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* @short_description: Container for features loaded from a shared object module
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* @see_also: #GstPluginFeature, #GstElementFactory
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*
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* GStreamer is extensible, so #GstElement instances can be loaded at runtime.
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* A plugin system can provide one or more of the basic
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* <application>GStreamer</application> #GstPluginFeature subclasses.
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*
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* A plugin should export a symbol <symbol>gst_plugin_desc</symbol> that is a
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* struct of type #GstPluginDesc.
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* the plugin loader will check the version of the core library the plugin was
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* linked against and will create a new #GstPlugin. It will then call the
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* #GstPluginInitFunc function that was provided in the
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* <symbol>gst_plugin_desc</symbol>.
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*
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* Once you have a handle to a #GstPlugin (e.g. from the #GstRegistry), you
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* can add any object that subclasses #GstPluginFeature.
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*
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* Usually plugins are always automatically loaded so you don't need to call
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* gst_plugin_load() explicitly to bring it into memory. There are options to
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* statically link plugins to an app or even use GStreamer without a plugin
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* repository in which case gst_plugin_load() can be needed to bring the plugin
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* into memory.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gst_private.h"
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#include <glib/gstdio.h>
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#include <sys/types.h>
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#ifdef HAVE_DIRENT_H
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#include <dirent.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 <signal.h>
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#include <errno.h>
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#include <string.h>
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#include "glib-compat-private.h"
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#include <gst/gst.h>
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#define GST_CAT_DEFAULT GST_CAT_PLUGIN_LOADING
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static guint _num_static_plugins; /* 0 */
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static GstPluginDesc *_static_plugins; /* NULL */
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static gboolean _gst_plugin_inited;
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static gchar **_plugin_loading_whitelist; /* NULL */
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/* static variables for segfault handling of plugin loading */
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static char *_gst_plugin_fault_handler_filename = NULL;
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/* list of valid licenses.
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* One of these must be specified or the plugin won't be loaded
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* Please file a bug to request any additional license be added.
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*
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* GPL: http://www.gnu.org/copyleft/gpl.html
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* LGPL: http://www.gnu.org/copyleft/lesser.html
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* QPL: http://www.trolltech.com/licenses/qpl.html
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* MPL: http://www.opensource.org/licenses/mozilla1.1.php
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* MIT/X11: http://www.opensource.org/licenses/mit-license.php
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* 3-clause BSD: https://opensource.org/licenses/BSD-3-Clause
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* Zero-Clause BSD: https://opensource.org/licenses/0BSD
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*/
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static const gchar valid_licenses[] = "LGPL\000" /* GNU Lesser General Public License */
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"GPL\000" /* GNU General Public License */
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"QPL\000" /* Trolltech Qt Public License */
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"GPL/QPL\000" /* Combi-license of GPL + QPL */
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"MPL\000" /* MPL 1.1 license */
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"BSD\000" /* 3-clause BSD license */
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"MIT/X11\000" /* MIT/X11 license */
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"0BSD\000" /* Zero-Clause BSD */
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"Proprietary\000" /* Proprietary license */
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GST_LICENSE_UNKNOWN; /* some other license */
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static const guint8 valid_licenses_idx[] = { 0, 5, 9, 13, 21, 25, 29, 37, 42,
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54
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};
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static GstPlugin *gst_plugin_register_func (GstPlugin * plugin,
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const GstPluginDesc * desc, gpointer user_data);
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static void gst_plugin_desc_copy (GstPluginDesc * dest,
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const GstPluginDesc * src);
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static void gst_plugin_ext_dep_free (GstPluginDep * dep);
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G_DEFINE_TYPE_WITH_PRIVATE (GstPlugin, gst_plugin, GST_TYPE_OBJECT);
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static void
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gst_plugin_init (GstPlugin * plugin)
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{
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plugin->priv = gst_plugin_get_instance_private (plugin);
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}
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static void
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gst_plugin_finalize (GObject * object)
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{
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GstPlugin *plugin = GST_PLUGIN_CAST (object);
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GST_DEBUG ("finalizing plugin %" GST_PTR_FORMAT, plugin);
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/* FIXME: make registry add a weak ref instead */
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#if 0
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GstRegistry *registry = gst_registry_get ();
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GList *g;
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for (g = registry->plugins; g; g = g->next) {
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if (g->data == (gpointer) plugin) {
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g_warning ("removing plugin that is still in registry");
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}
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}
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#endif
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g_free (plugin->filename);
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g_free (plugin->basename);
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g_list_foreach (plugin->priv->deps, (GFunc) gst_plugin_ext_dep_free, NULL);
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g_list_free (plugin->priv->deps);
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plugin->priv->deps = NULL;
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if (plugin->priv->cache_data) {
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gst_structure_free (plugin->priv->cache_data);
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}
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G_OBJECT_CLASS (gst_plugin_parent_class)->finalize (object);
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}
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static void
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gst_plugin_class_init (GstPluginClass * klass)
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{
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G_OBJECT_CLASS (klass)->finalize = gst_plugin_finalize;
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}
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GQuark
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gst_plugin_error_quark (void)
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{
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static GQuark quark = 0;
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if (!quark)
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quark = g_quark_from_static_string ("gst_plugin_error");
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return quark;
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}
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/**
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* gst_plugin_register_static:
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* @major_version: the major version number of the GStreamer core that the
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* plugin was compiled for, you can just use GST_VERSION_MAJOR here
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* @minor_version: the minor version number of the GStreamer core that the
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* plugin was compiled for, you can just use GST_VERSION_MINOR here
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* @name: a unique name of the plugin (ideally prefixed with an application- or
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* library-specific namespace prefix in order to avoid name conflicts in
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* case a similar plugin with the same name ever gets added to GStreamer)
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* @description: description of the plugin
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* @init_func: (scope call): pointer to the init function of this plugin.
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* @version: version string of the plugin
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* @license: effective license of plugin. Must be one of the approved licenses
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* (see #GstPluginDesc above) or the plugin will not be registered.
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* @source: source module plugin belongs to
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* @package: shipped package plugin belongs to
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* @origin: URL to provider of plugin
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*
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* Registers a static plugin, ie. a plugin which is private to an application
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* or library and contained within the application or library (as opposed to
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* being shipped as a separate module file).
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*
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* You must make sure that GStreamer has been initialised (with gst_init() or
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* via gst_init_get_option_group()) before calling this function.
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*
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* Returns: %TRUE if the plugin was registered correctly, otherwise %FALSE.
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*/
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gboolean
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gst_plugin_register_static (gint major_version, gint minor_version,
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const gchar * name, const gchar * description, GstPluginInitFunc init_func,
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const gchar * version, const gchar * license, const gchar * source,
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const gchar * package, const gchar * origin)
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{
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GstPluginDesc desc = { major_version, minor_version, name, description,
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init_func, version, license, source, package, origin, NULL,
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};
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GstPlugin *plugin;
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gboolean res = FALSE;
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g_return_val_if_fail (name != NULL, FALSE);
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g_return_val_if_fail (description != NULL, FALSE);
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g_return_val_if_fail (init_func != NULL, FALSE);
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g_return_val_if_fail (version != NULL, FALSE);
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g_return_val_if_fail (license != NULL, FALSE);
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g_return_val_if_fail (source != NULL, FALSE);
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g_return_val_if_fail (package != NULL, FALSE);
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g_return_val_if_fail (origin != NULL, FALSE);
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/* make sure gst_init() has been called */
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g_return_val_if_fail (_gst_plugin_inited != FALSE, FALSE);
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GST_LOG ("attempting to load static plugin \"%s\" now...", name);
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plugin = g_object_new (GST_TYPE_PLUGIN, NULL);
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if (gst_plugin_register_func (plugin, &desc, NULL) != NULL) {
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GST_INFO ("registered static plugin \"%s\"", name);
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res = gst_registry_add_plugin (gst_registry_get (), plugin);
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GST_INFO ("added static plugin \"%s\", result: %d", name, res);
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}
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return res;
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}
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/**
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* gst_plugin_register_static_full:
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* @major_version: the major version number of the GStreamer core that the
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* plugin was compiled for, you can just use GST_VERSION_MAJOR here
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* @minor_version: the minor version number of the GStreamer core that the
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* plugin was compiled for, you can just use GST_VERSION_MINOR here
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* @name: a unique name of the plugin (ideally prefixed with an application- or
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* library-specific namespace prefix in order to avoid name conflicts in
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* case a similar plugin with the same name ever gets added to GStreamer)
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* @description: description of the plugin
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* @init_full_func: (scope call): pointer to the init function with user data
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* of this plugin.
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* @version: version string of the plugin
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* @license: effective license of plugin. Must be one of the approved licenses
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* (see #GstPluginDesc above) or the plugin will not be registered.
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* @source: source module plugin belongs to
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* @package: shipped package plugin belongs to
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* @origin: URL to provider of plugin
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* @user_data: gpointer to user data
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*
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* Registers a static plugin, ie. a plugin which is private to an application
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* or library and contained within the application or library (as opposed to
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* being shipped as a separate module file) with a #GstPluginInitFullFunc
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* which allows user data to be passed to the callback function (useful
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* for bindings).
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*
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* You must make sure that GStreamer has been initialised (with gst_init() or
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* via gst_init_get_option_group()) before calling this function.
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*
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* Returns: %TRUE if the plugin was registered correctly, otherwise %FALSE.
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*/
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gboolean
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gst_plugin_register_static_full (gint major_version, gint minor_version,
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const gchar * name, const gchar * description,
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GstPluginInitFullFunc init_full_func, const gchar * version,
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const gchar * license, const gchar * source, const gchar * package,
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const gchar * origin, gpointer user_data)
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{
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GstPluginDesc desc = { major_version, minor_version, name, description,
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(GstPluginInitFunc) init_full_func, version, license, source, package,
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origin, NULL,
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};
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GstPlugin *plugin;
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gboolean res = FALSE;
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g_return_val_if_fail (name != NULL, FALSE);
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g_return_val_if_fail (description != NULL, FALSE);
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g_return_val_if_fail (init_full_func != NULL, FALSE);
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g_return_val_if_fail (version != NULL, FALSE);
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g_return_val_if_fail (license != NULL, FALSE);
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g_return_val_if_fail (source != NULL, FALSE);
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g_return_val_if_fail (package != NULL, FALSE);
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g_return_val_if_fail (origin != NULL, FALSE);
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/* make sure gst_init() has been called */
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g_return_val_if_fail (_gst_plugin_inited != FALSE, FALSE);
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GST_LOG ("attempting to load static plugin \"%s\" now...", name);
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plugin = g_object_new (GST_TYPE_PLUGIN, NULL);
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if (gst_plugin_register_func (plugin, &desc, user_data) != NULL) {
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GST_INFO ("registered static plugin \"%s\"", name);
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res = gst_registry_add_plugin (gst_registry_get (), plugin);
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GST_INFO ("added static plugin \"%s\", result: %d", name, res);
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}
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return res;
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}
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void
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_priv_gst_plugin_initialize (void)
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{
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const gchar *whitelist;
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guint i;
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_gst_plugin_inited = TRUE;
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whitelist = g_getenv ("GST_PLUGIN_LOADING_WHITELIST");
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if (whitelist != NULL && *whitelist != '\0') {
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_plugin_loading_whitelist = g_strsplit (whitelist,
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G_SEARCHPATH_SEPARATOR_S, -1);
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for (i = 0; _plugin_loading_whitelist[i] != NULL; ++i) {
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GST_INFO ("plugins whitelist entry: %s", _plugin_loading_whitelist[i]);
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}
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}
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/* now register all static plugins */
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GST_INFO ("registering %u static plugins", _num_static_plugins);
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for (i = 0; i < _num_static_plugins; ++i) {
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gst_plugin_register_static (_static_plugins[i].major_version,
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_static_plugins[i].minor_version, _static_plugins[i].name,
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_static_plugins[i].description, _static_plugins[i].plugin_init,
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_static_plugins[i].version, _static_plugins[i].license,
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_static_plugins[i].source, _static_plugins[i].package,
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_static_plugins[i].origin);
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}
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if (_static_plugins) {
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free (_static_plugins);
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_static_plugins = NULL;
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_num_static_plugins = 0;
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}
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}
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/* Whitelist entry format:
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*
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* plugin1,plugin2@pathprefix or
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* plugin1,plugin2@* or just
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* plugin1,plugin2 or
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* source-package@pathprefix or
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* source-package@* or just
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* source-package
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*
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* ie. the bit before the path will be checked against both the plugin
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* name and the plugin's source package name, to keep the format simple.
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*/
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static gboolean
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gst_plugin_desc_matches_whitelist_entry (const GstPluginDesc * desc,
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const gchar * filename, const gchar * pattern)
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{
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const gchar *sep;
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gboolean ret = FALSE;
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gchar *name;
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GST_LOG ("Whitelist pattern '%s', plugin: %s of %s@%s", pattern, desc->name,
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desc->source, GST_STR_NULL (filename));
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/* do we have a path prefix? */
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sep = strchr (pattern, '@');
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if (sep != NULL && strcmp (sep, "@*") != 0 && strcmp (sep, "@") != 0) {
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/* paths are not canonicalised or treated with realpath() here. This
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* should be good enough for our use case, since we just use the paths
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* autotools uses, and those will be constructed from the same prefix. */
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if (filename != NULL && !g_str_has_prefix (filename, sep + 1))
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return FALSE;
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GST_LOG ("%s matches path prefix %s", GST_STR_NULL (filename), sep + 1);
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}
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if (sep != NULL) {
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name = g_strndup (pattern, (gsize) (sep - pattern));
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} else {
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name = g_strdup (pattern);
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}
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g_strstrip (name);
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if (!g_ascii_isalnum (*name)) {
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GST_WARNING ("Invalid whitelist pattern: %s", pattern);
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goto done;
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}
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/* now check plugin names / source package name */
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if (strchr (name, ',') == NULL) {
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/* only a single name: either a plugin name or the source package name */
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ret = (strcmp (desc->source, name) == 0 || strcmp (desc->name, name) == 0);
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} else {
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gchar **n, **names;
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/* multiple names: assume these are plugin names */
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names = g_strsplit (name, ",", -1);
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for (n = names; n != NULL && *n != NULL; ++n) {
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g_strstrip (*n);
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if (strcmp (desc->name, *n) == 0) {
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ret = TRUE;
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break;
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}
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}
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g_strfreev (names);
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}
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GST_LOG ("plugin / source package name match: %d", ret);
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done:
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g_free (name);
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return ret;
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}
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gboolean
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priv_gst_plugin_desc_is_whitelisted (const GstPluginDesc * desc,
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const gchar * filename)
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{
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gchar **entry;
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if (_plugin_loading_whitelist == NULL)
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return TRUE;
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for (entry = _plugin_loading_whitelist; *entry != NULL; ++entry) {
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if (gst_plugin_desc_matches_whitelist_entry (desc, filename, *entry)) {
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GST_LOG ("Plugin %s is in whitelist", filename);
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return TRUE;
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}
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}
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GST_LOG ("Plugin %s (package %s, file %s) not in whitelist", desc->name,
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desc->source, filename);
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return FALSE;
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}
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gboolean
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priv_gst_plugin_loading_have_whitelist (void)
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{
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return (_plugin_loading_whitelist != NULL);
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}
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guint32
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priv_gst_plugin_loading_get_whitelist_hash (void)
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{
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guint32 hash = 0;
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if (_plugin_loading_whitelist != NULL) {
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gchar **w;
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for (w = _plugin_loading_whitelist; *w != NULL; ++w)
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hash ^= g_str_hash (*w);
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}
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return hash;
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}
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/* this function could be extended to check if the plugin license matches the
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* applications license (would require the app to register its license somehow).
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* We'll wait for someone who's interested in it to code it :)
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*/
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static gboolean
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gst_plugin_check_license (const gchar * license)
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{
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gint i;
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for (i = 0; i < G_N_ELEMENTS (valid_licenses_idx); ++i) {
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if (strcmp (license, valid_licenses + valid_licenses_idx[i]) == 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 gboolean
|
|
gst_plugin_check_version (gint major, gint minor)
|
|
{
|
|
/* return NULL if the major and minor version numbers are not compatible */
|
|
/* with ours. */
|
|
if (major != GST_VERSION_MAJOR || minor > GST_VERSION_MINOR)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstPlugin *
|
|
gst_plugin_register_func (GstPlugin * plugin, const GstPluginDesc * desc,
|
|
gpointer user_data)
|
|
{
|
|
if (!gst_plugin_check_version (desc->major_version, desc->minor_version)) {
|
|
if (GST_CAT_DEFAULT)
|
|
GST_WARNING ("plugin \"%s\" has incompatible version "
|
|
"(plugin: %d.%d, gst: %d,%d), not loading",
|
|
GST_STR_NULL (plugin->filename), desc->major_version,
|
|
desc->minor_version, GST_VERSION_MAJOR, GST_VERSION_MINOR);
|
|
return NULL;
|
|
}
|
|
|
|
if (!desc->license || !desc->description || !desc->source ||
|
|
!desc->package || !desc->origin) {
|
|
if (GST_CAT_DEFAULT)
|
|
GST_WARNING ("plugin \"%s\" has missing detail in GstPluginDesc, not "
|
|
"loading", GST_STR_NULL (plugin->filename));
|
|
return NULL;
|
|
}
|
|
|
|
if (!gst_plugin_check_license (desc->license)) {
|
|
if (GST_CAT_DEFAULT)
|
|
GST_WARNING ("plugin \"%s\" has invalid license \"%s\", not loading",
|
|
GST_STR_NULL (plugin->filename), desc->license);
|
|
return NULL;
|
|
}
|
|
|
|
if (GST_CAT_DEFAULT)
|
|
GST_LOG ("plugin \"%s\" looks good", GST_STR_NULL (plugin->filename));
|
|
|
|
gst_plugin_desc_copy (&plugin->desc, desc);
|
|
|
|
/* make resident so we're really sure it never gets unloaded again.
|
|
* Theoretically this is not needed, but practically it doesn't hurt.
|
|
* And we're rather safe than sorry. */
|
|
if (plugin->module)
|
|
g_module_make_resident (plugin->module);
|
|
|
|
if (user_data) {
|
|
if (!(((GstPluginInitFullFunc) (desc->plugin_init)) (plugin, user_data))) {
|
|
if (GST_CAT_DEFAULT)
|
|
GST_WARNING ("plugin \"%s\" failed to initialise",
|
|
GST_STR_NULL (plugin->filename));
|
|
return NULL;
|
|
}
|
|
} else {
|
|
if (!((desc->plugin_init) (plugin))) {
|
|
if (GST_CAT_DEFAULT)
|
|
GST_WARNING ("plugin \"%s\" failed to initialise",
|
|
GST_STR_NULL (plugin->filename));
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (GST_CAT_DEFAULT)
|
|
GST_LOG ("plugin \"%s\" initialised", GST_STR_NULL (plugin->filename));
|
|
|
|
return plugin;
|
|
}
|
|
|
|
#ifdef HAVE_SIGACTION
|
|
static struct sigaction oldaction;
|
|
static gboolean _gst_plugin_fault_handler_is_setup = FALSE;
|
|
|
|
/*
|
|
* _gst_plugin_fault_handler_restore:
|
|
* segfault handler restorer
|
|
*/
|
|
static void
|
|
_gst_plugin_fault_handler_restore (void)
|
|
{
|
|
if (!_gst_plugin_fault_handler_is_setup)
|
|
return;
|
|
|
|
_gst_plugin_fault_handler_is_setup = FALSE;
|
|
|
|
sigaction (SIGSEGV, &oldaction, NULL);
|
|
}
|
|
|
|
/*
|
|
* _gst_plugin_fault_handler_sighandler:
|
|
* segfault handler implementation
|
|
*/
|
|
static void
|
|
_gst_plugin_fault_handler_sighandler (int signum)
|
|
{
|
|
/* We need to restore the fault handler or we'll keep getting it */
|
|
_gst_plugin_fault_handler_restore ();
|
|
|
|
switch (signum) {
|
|
case SIGSEGV:
|
|
g_print ("\nERROR: ");
|
|
g_print ("Caught a segmentation fault while loading plugin file:\n");
|
|
g_print ("%s\n\n", _gst_plugin_fault_handler_filename);
|
|
g_print ("Please either:\n");
|
|
g_print ("- remove it and restart.\n");
|
|
g_print
|
|
("- run with --gst-disable-segtrap --gst-disable-registry-fork and debug.\n");
|
|
exit (-1);
|
|
break;
|
|
default:
|
|
g_print ("Caught unhandled signal on plugin loading\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* _gst_plugin_fault_handler_setup:
|
|
* sets up the segfault handler
|
|
*/
|
|
static void
|
|
_gst_plugin_fault_handler_setup (void)
|
|
{
|
|
struct sigaction action;
|
|
|
|
/* if asked to leave segfaults alone, just return */
|
|
if (!gst_segtrap_is_enabled ())
|
|
return;
|
|
|
|
if (_gst_plugin_fault_handler_is_setup)
|
|
return;
|
|
|
|
_gst_plugin_fault_handler_is_setup = TRUE;
|
|
|
|
memset (&action, 0, sizeof (action));
|
|
action.sa_handler = _gst_plugin_fault_handler_sighandler;
|
|
|
|
sigaction (SIGSEGV, &action, &oldaction);
|
|
}
|
|
#else /* !HAVE_SIGACTION */
|
|
static void
|
|
_gst_plugin_fault_handler_restore (void)
|
|
{
|
|
}
|
|
|
|
static void
|
|
_gst_plugin_fault_handler_setup (void)
|
|
{
|
|
}
|
|
#endif /* HAVE_SIGACTION */
|
|
|
|
/* g_time_val_from_iso8601() doesn't do quite what we want */
|
|
static gboolean
|
|
check_release_datetime (const gchar * date_time)
|
|
{
|
|
guint64 val;
|
|
|
|
/* we require YYYY-MM-DD or YYYY-MM-DDTHH:MMZ format */
|
|
if (!g_ascii_isdigit (*date_time))
|
|
return FALSE;
|
|
|
|
val = g_ascii_strtoull (date_time, (gchar **) & date_time, 10);
|
|
if (val < 2000 || val > 2100 || *date_time != '-')
|
|
return FALSE;
|
|
|
|
val = g_ascii_strtoull (date_time + 1, (gchar **) & date_time, 10);
|
|
if (val == 0 || val > 12 || *date_time != '-')
|
|
return FALSE;
|
|
|
|
val = g_ascii_strtoull (date_time + 1, (gchar **) & date_time, 10);
|
|
if (val == 0 || val > 32)
|
|
return FALSE;
|
|
|
|
/* end of string or date/time separator + HH:MMZ */
|
|
if (*date_time == 'T' || *date_time == ' ') {
|
|
val = g_ascii_strtoull (date_time + 1, (gchar **) & date_time, 10);
|
|
if (val > 24 || *date_time != ':')
|
|
return FALSE;
|
|
|
|
val = g_ascii_strtoull (date_time + 1, (gchar **) & date_time, 10);
|
|
if (val > 59 || *date_time != 'Z')
|
|
return FALSE;
|
|
|
|
++date_time;
|
|
}
|
|
|
|
return (*date_time == '\0');
|
|
}
|
|
|
|
static GMutex gst_plugin_loading_mutex;
|
|
|
|
#define CHECK_PLUGIN_DESC_FIELD(desc,field,fn) \
|
|
if (G_UNLIKELY ((desc)->field == NULL || *(desc)->field == '\0')) { \
|
|
g_warning ("Plugin description for '%s' has no valid %s field", fn, G_STRINGIFY (field)); \
|
|
g_set_error (error, GST_PLUGIN_ERROR, GST_PLUGIN_ERROR_MODULE, \
|
|
"Plugin %s has invalid plugin description field '%s'", \
|
|
filename, G_STRINGIFY (field)); \
|
|
goto return_error; \
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_load_file:
|
|
* @filename: (type filename): the plugin filename to load
|
|
* @error: pointer to a %NULL-valued GError
|
|
*
|
|
* Loads the given plugin and refs it. Caller needs to unref after use.
|
|
*
|
|
* Returns: (transfer full): a reference to the existing loaded GstPlugin, a
|
|
* reference to the newly-loaded GstPlugin, or %NULL if an error occurred.
|
|
*/
|
|
GstPlugin *
|
|
gst_plugin_load_file (const gchar * filename, GError ** error)
|
|
{
|
|
return _priv_gst_plugin_load_file_for_registry (filename, NULL, error);
|
|
}
|
|
|
|
static gchar *
|
|
extract_symname (const char *filename)
|
|
{
|
|
gchar *bname, *name, *symname;
|
|
const gchar *dot;
|
|
gsize prefix_len, len;
|
|
int i;
|
|
|
|
bname = g_path_get_basename (filename);
|
|
for (i = 0; bname[i]; ++i) {
|
|
if (bname[i] == '-')
|
|
bname[i] = '_';
|
|
}
|
|
|
|
if (g_str_has_prefix (bname, "libgst"))
|
|
prefix_len = 6;
|
|
else if (g_str_has_prefix (bname, "lib"))
|
|
prefix_len = 3;
|
|
else if (g_str_has_prefix (bname, "gst"))
|
|
prefix_len = 3;
|
|
else
|
|
prefix_len = 0; /* use whole name (minus suffix) as plugin name */
|
|
|
|
dot = g_utf8_strchr (bname, -1, '.');
|
|
if (dot)
|
|
len = dot - bname - prefix_len;
|
|
else
|
|
len = strlen (bname + prefix_len);
|
|
|
|
name = g_strndup (bname + prefix_len, len);
|
|
g_free (bname);
|
|
|
|
symname = g_strconcat ("gst_plugin_", name, "_get_desc", NULL);
|
|
g_free (name);
|
|
|
|
return symname;
|
|
}
|
|
|
|
/* Note: The return value is (transfer full) although we work with floating
|
|
* references here. If a new plugin instance is created, it is always sinked
|
|
* in the registry first and a new reference is returned
|
|
*/
|
|
GstPlugin *
|
|
_priv_gst_plugin_load_file_for_registry (const gchar * filename,
|
|
GstRegistry * registry, GError ** error)
|
|
{
|
|
const GstPluginDesc *desc;
|
|
GstPlugin *plugin;
|
|
gchar *symname;
|
|
GModule *module;
|
|
gboolean ret;
|
|
gpointer ptr;
|
|
GStatBuf file_status;
|
|
gboolean new_plugin = TRUE;
|
|
GModuleFlags flags;
|
|
|
|
g_return_val_if_fail (filename != NULL, NULL);
|
|
|
|
if (registry == NULL)
|
|
registry = gst_registry_get ();
|
|
|
|
g_mutex_lock (&gst_plugin_loading_mutex);
|
|
|
|
plugin = gst_registry_lookup (registry, filename);
|
|
if (plugin) {
|
|
if (plugin->module) {
|
|
/* already loaded */
|
|
g_mutex_unlock (&gst_plugin_loading_mutex);
|
|
return plugin;
|
|
} else {
|
|
/* load plugin and update fields */
|
|
new_plugin = FALSE;
|
|
}
|
|
}
|
|
|
|
GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING, "attempt to load plugin \"%s\"",
|
|
filename);
|
|
|
|
if (!g_module_supported ()) {
|
|
GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING, "module loading not supported");
|
|
g_set_error (error,
|
|
GST_PLUGIN_ERROR,
|
|
GST_PLUGIN_ERROR_MODULE, "Dynamic loading not supported");
|
|
goto return_error;
|
|
}
|
|
|
|
if (g_stat (filename, &file_status)) {
|
|
GST_CAT_DEBUG (GST_CAT_PLUGIN_LOADING, "problem accessing file");
|
|
g_set_error (error,
|
|
GST_PLUGIN_ERROR,
|
|
GST_PLUGIN_ERROR_MODULE, "Problem accessing file %s: %s", filename,
|
|
g_strerror (errno));
|
|
goto return_error;
|
|
}
|
|
|
|
flags = G_MODULE_BIND_LOCAL;
|
|
/* libgstpython.so is the gst-python plugin loader. It needs to be loaded with
|
|
* G_MODULE_BIND_LAZY.
|
|
*
|
|
* Ideally there should be a generic way for plugins to specify that they
|
|
* need to be loaded with _LAZY.
|
|
* */
|
|
if (strstr (filename, "libgstpython"))
|
|
flags |= G_MODULE_BIND_LAZY;
|
|
|
|
module = g_module_open (filename, flags);
|
|
if (module == NULL) {
|
|
GST_CAT_WARNING (GST_CAT_PLUGIN_LOADING, "module_open failed: %s",
|
|
g_module_error ());
|
|
g_set_error (error,
|
|
GST_PLUGIN_ERROR, GST_PLUGIN_ERROR_MODULE, "Opening module failed: %s",
|
|
g_module_error ());
|
|
/* If we failed to open the shared object, then it's probably because a
|
|
* plugin is linked against the wrong libraries. Print out an easy-to-see
|
|
* message in this case. */
|
|
g_warning ("Failed to load plugin '%s': %s", filename, g_module_error ());
|
|
goto return_error;
|
|
}
|
|
|
|
symname = extract_symname (filename);
|
|
ret = g_module_symbol (module, symname, &ptr);
|
|
|
|
if (ret) {
|
|
GstPluginDesc *(*get_desc) (void) = ptr;
|
|
ptr = get_desc ();
|
|
} else {
|
|
GST_DEBUG ("Could not find symbol '%s', falling back to gst_plugin_desc",
|
|
symname);
|
|
ret = g_module_symbol (module, "gst_plugin_desc", &ptr);
|
|
}
|
|
|
|
g_free (symname);
|
|
|
|
if (!ret) {
|
|
GST_DEBUG ("Could not find plugin entry point in \"%s\"", filename);
|
|
g_set_error (error,
|
|
GST_PLUGIN_ERROR,
|
|
GST_PLUGIN_ERROR_MODULE,
|
|
"File \"%s\" is not a GStreamer plugin", filename);
|
|
g_module_close (module);
|
|
goto return_error;
|
|
}
|
|
|
|
desc = (const GstPluginDesc *) ptr;
|
|
|
|
if (priv_gst_plugin_loading_have_whitelist () &&
|
|
!priv_gst_plugin_desc_is_whitelisted (desc, filename)) {
|
|
GST_INFO ("Whitelist specified and plugin not in whitelist, not loading: "
|
|
"name=%s, package=%s, file=%s", desc->name, desc->source, filename);
|
|
g_set_error (error, GST_PLUGIN_ERROR, GST_PLUGIN_ERROR_MODULE,
|
|
"Not loading plugin file \"%s\", not in whitelist", filename);
|
|
g_module_close (module);
|
|
goto return_error;
|
|
}
|
|
|
|
if (new_plugin) {
|
|
plugin = g_object_new (GST_TYPE_PLUGIN, NULL);
|
|
plugin->file_mtime = file_status.st_mtime;
|
|
plugin->file_size = file_status.st_size;
|
|
plugin->filename = g_strdup (filename);
|
|
plugin->basename = g_path_get_basename (filename);
|
|
}
|
|
|
|
plugin->module = module;
|
|
|
|
if (new_plugin) {
|
|
/* check plugin description: complain about bad values and fail */
|
|
CHECK_PLUGIN_DESC_FIELD (desc, name, filename);
|
|
CHECK_PLUGIN_DESC_FIELD (desc, description, filename);
|
|
CHECK_PLUGIN_DESC_FIELD (desc, version, filename);
|
|
CHECK_PLUGIN_DESC_FIELD (desc, license, filename);
|
|
CHECK_PLUGIN_DESC_FIELD (desc, source, filename);
|
|
CHECK_PLUGIN_DESC_FIELD (desc, package, filename);
|
|
CHECK_PLUGIN_DESC_FIELD (desc, origin, filename);
|
|
|
|
if (desc->name != NULL && desc->name[0] == '"') {
|
|
g_warning ("Invalid plugin name '%s' - fix your GST_PLUGIN_DEFINE "
|
|
"(remove quotes around plugin name)", desc->name);
|
|
}
|
|
|
|
if (desc->release_datetime != NULL &&
|
|
!check_release_datetime (desc->release_datetime)) {
|
|
g_warning ("GstPluginDesc for '%s' has invalid datetime '%s'",
|
|
filename, desc->release_datetime);
|
|
g_set_error (error, GST_PLUGIN_ERROR, GST_PLUGIN_ERROR_MODULE,
|
|
"Plugin %s has invalid plugin description field 'release_datetime'",
|
|
filename);
|
|
goto return_error;
|
|
}
|
|
}
|
|
|
|
GST_LOG ("Plugin %p for file \"%s\" prepared, calling entry function...",
|
|
plugin, filename);
|
|
|
|
/* this is where we load the actual .so, so let's trap SIGSEGV */
|
|
_gst_plugin_fault_handler_setup ();
|
|
_gst_plugin_fault_handler_filename = plugin->filename;
|
|
|
|
GST_LOG ("Plugin %p for file \"%s\" prepared, registering...",
|
|
plugin, filename);
|
|
|
|
if (!gst_plugin_register_func (plugin, desc, NULL)) {
|
|
/* remove signal handler */
|
|
_gst_plugin_fault_handler_restore ();
|
|
GST_DEBUG ("gst_plugin_register_func failed for plugin \"%s\"", filename);
|
|
/* plugin == NULL */
|
|
g_set_error (error,
|
|
GST_PLUGIN_ERROR,
|
|
GST_PLUGIN_ERROR_MODULE,
|
|
"File \"%s\" appears to be a GStreamer plugin, but it failed to initialize",
|
|
filename);
|
|
goto return_error;
|
|
}
|
|
|
|
/* remove signal handler */
|
|
_gst_plugin_fault_handler_restore ();
|
|
_gst_plugin_fault_handler_filename = NULL;
|
|
GST_INFO ("plugin \"%s\" loaded", plugin->filename);
|
|
|
|
if (new_plugin) {
|
|
gst_object_ref (plugin);
|
|
gst_registry_add_plugin (registry, plugin);
|
|
}
|
|
|
|
g_mutex_unlock (&gst_plugin_loading_mutex);
|
|
return plugin;
|
|
|
|
return_error:
|
|
{
|
|
if (plugin)
|
|
gst_object_unref (plugin);
|
|
g_mutex_unlock (&gst_plugin_loading_mutex);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_plugin_desc_copy (GstPluginDesc * dest, const GstPluginDesc * src)
|
|
{
|
|
dest->major_version = src->major_version;
|
|
dest->minor_version = src->minor_version;
|
|
dest->name = g_intern_string (src->name);
|
|
dest->description = g_intern_string (src->description);
|
|
dest->plugin_init = src->plugin_init;
|
|
dest->version = g_intern_string (src->version);
|
|
dest->license = g_intern_string (src->license);
|
|
dest->source = g_intern_string (src->source);
|
|
dest->package = g_intern_string (src->package);
|
|
dest->origin = g_intern_string (src->origin);
|
|
dest->release_datetime = g_intern_string (src->release_datetime);
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_get_name:
|
|
* @plugin: plugin to get the name of
|
|
*
|
|
* Get the short name of the plugin
|
|
*
|
|
* Returns: the name of the plugin
|
|
*/
|
|
const gchar *
|
|
gst_plugin_get_name (GstPlugin * plugin)
|
|
{
|
|
g_return_val_if_fail (plugin != NULL, NULL);
|
|
|
|
return plugin->desc.name;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_get_description:
|
|
* @plugin: plugin to get long name of
|
|
*
|
|
* Get the long descriptive name of the plugin
|
|
*
|
|
* Returns: the long name of the plugin
|
|
*/
|
|
const gchar *
|
|
gst_plugin_get_description (GstPlugin * plugin)
|
|
{
|
|
g_return_val_if_fail (plugin != NULL, NULL);
|
|
|
|
return plugin->desc.description;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_get_filename:
|
|
* @plugin: plugin to get the filename of
|
|
*
|
|
* get the filename of the plugin
|
|
*
|
|
* Returns: (type filename): the filename of the plugin
|
|
*/
|
|
const gchar *
|
|
gst_plugin_get_filename (GstPlugin * plugin)
|
|
{
|
|
g_return_val_if_fail (plugin != NULL, NULL);
|
|
|
|
return plugin->filename;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_get_version:
|
|
* @plugin: plugin to get the version of
|
|
*
|
|
* get the version of the plugin
|
|
*
|
|
* Returns: the version of the plugin
|
|
*/
|
|
const gchar *
|
|
gst_plugin_get_version (GstPlugin * plugin)
|
|
{
|
|
g_return_val_if_fail (plugin != NULL, NULL);
|
|
|
|
return plugin->desc.version;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_get_license:
|
|
* @plugin: plugin to get the license of
|
|
*
|
|
* get the license of the plugin
|
|
*
|
|
* Returns: the license of the plugin
|
|
*/
|
|
const gchar *
|
|
gst_plugin_get_license (GstPlugin * plugin)
|
|
{
|
|
g_return_val_if_fail (plugin != NULL, NULL);
|
|
|
|
return plugin->desc.license;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_get_source:
|
|
* @plugin: plugin to get the source of
|
|
*
|
|
* get the source module the plugin belongs to.
|
|
*
|
|
* Returns: the source of the plugin
|
|
*/
|
|
const gchar *
|
|
gst_plugin_get_source (GstPlugin * plugin)
|
|
{
|
|
g_return_val_if_fail (plugin != NULL, NULL);
|
|
|
|
return plugin->desc.source;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_get_package:
|
|
* @plugin: plugin to get the package of
|
|
*
|
|
* get the package the plugin belongs to.
|
|
*
|
|
* Returns: the package of the plugin
|
|
*/
|
|
const gchar *
|
|
gst_plugin_get_package (GstPlugin * plugin)
|
|
{
|
|
g_return_val_if_fail (plugin != NULL, NULL);
|
|
|
|
return plugin->desc.package;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_get_origin:
|
|
* @plugin: plugin to get the origin of
|
|
*
|
|
* get the URL where the plugin comes from
|
|
*
|
|
* Returns: the origin of the plugin
|
|
*/
|
|
const gchar *
|
|
gst_plugin_get_origin (GstPlugin * plugin)
|
|
{
|
|
g_return_val_if_fail (plugin != NULL, NULL);
|
|
|
|
return plugin->desc.origin;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_get_release_date_string:
|
|
* @plugin: plugin to get the release date of
|
|
*
|
|
* Get the release date (and possibly time) in form of a string, if available.
|
|
*
|
|
* For normal GStreamer plugin releases this will usually just be a date in
|
|
* the form of "YYYY-MM-DD", while pre-releases and builds from git may contain
|
|
* a time component after the date as well, in which case the string will be
|
|
* formatted like "YYYY-MM-DDTHH:MMZ" (e.g. "2012-04-30T09:30Z").
|
|
*
|
|
* There may be plugins that do not have a valid release date set on them.
|
|
*
|
|
* Returns: (nullable): the date string of the plugin, or %NULL if not
|
|
* available.
|
|
*/
|
|
const gchar *
|
|
gst_plugin_get_release_date_string (GstPlugin * plugin)
|
|
{
|
|
g_return_val_if_fail (plugin != NULL, NULL);
|
|
|
|
return plugin->desc.release_datetime;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_is_loaded:
|
|
* @plugin: plugin to query
|
|
*
|
|
* queries if the plugin is loaded into memory
|
|
*
|
|
* Returns: %TRUE is loaded, %FALSE otherwise
|
|
*/
|
|
gboolean
|
|
gst_plugin_is_loaded (GstPlugin * plugin)
|
|
{
|
|
g_return_val_if_fail (plugin != NULL, FALSE);
|
|
|
|
return (plugin->module != NULL || plugin->filename == NULL);
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_get_cache_data:
|
|
* @plugin: a plugin
|
|
*
|
|
* Gets the plugin specific data cache. If it is %NULL there is no cached data
|
|
* stored. This is the case when the registry is getting rebuilt.
|
|
*
|
|
* Returns: (transfer none) (nullable): The cached data as a
|
|
* #GstStructure or %NULL.
|
|
*/
|
|
const GstStructure *
|
|
gst_plugin_get_cache_data (GstPlugin * plugin)
|
|
{
|
|
g_return_val_if_fail (GST_IS_PLUGIN (plugin), NULL);
|
|
|
|
return plugin->priv->cache_data;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_set_cache_data:
|
|
* @plugin: a plugin
|
|
* @cache_data: (transfer full): a structure containing the data to cache
|
|
*
|
|
* Adds plugin specific data to cache. Passes the ownership of the structure to
|
|
* the @plugin.
|
|
*
|
|
* The cache is flushed every time the registry is rebuilt.
|
|
*/
|
|
void
|
|
gst_plugin_set_cache_data (GstPlugin * plugin, GstStructure * cache_data)
|
|
{
|
|
g_return_if_fail (GST_IS_PLUGIN (plugin));
|
|
g_return_if_fail (GST_IS_STRUCTURE (cache_data));
|
|
|
|
if (plugin->priv->cache_data) {
|
|
gst_structure_free (plugin->priv->cache_data);
|
|
}
|
|
plugin->priv->cache_data = cache_data;
|
|
}
|
|
|
|
#if 0
|
|
/**
|
|
* gst_plugin_feature_list:
|
|
* @plugin: plugin to query
|
|
* @filter: the filter to use
|
|
* @first: only return first match
|
|
* @user_data: user data passed to the filter function
|
|
*
|
|
* Runs a filter against all plugin features and returns a GList with
|
|
* the results. If the first flag is set, only the first match is
|
|
* returned (as a list with a single object).
|
|
*
|
|
* Returns: a GList of features, g_list_free after use.
|
|
*/
|
|
GList *
|
|
gst_plugin_feature_filter (GstPlugin * plugin,
|
|
GstPluginFeatureFilter filter, gboolean first, gpointer user_data)
|
|
{
|
|
GList *list;
|
|
GList *g;
|
|
|
|
list = gst_filter_run (plugin->features, (GstFilterFunc) filter, first,
|
|
user_data);
|
|
for (g = list; g; g = g->next) {
|
|
gst_object_ref (plugin);
|
|
}
|
|
|
|
return list;
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
GstPluginFeatureFilter filter;
|
|
gboolean first;
|
|
gpointer user_data;
|
|
GList *result;
|
|
}
|
|
FeatureFilterData;
|
|
|
|
static gboolean
|
|
_feature_filter (GstPlugin * plugin, gpointer user_data)
|
|
{
|
|
GList *result;
|
|
FeatureFilterData *data = (FeatureFilterData *) user_data;
|
|
|
|
result = gst_plugin_feature_filter (plugin, data->filter, data->first,
|
|
data->user_data);
|
|
if (result) {
|
|
data->result = g_list_concat (data->result, result);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_list_feature_filter:
|
|
* @list: a #GList of plugins to query
|
|
* @filter: the filter function to use
|
|
* @first: only return first match
|
|
* @user_data: user data passed to the filter function
|
|
*
|
|
* Runs a filter against all plugin features of the plugins in the given
|
|
* list and returns a GList with the results.
|
|
* If the first flag is set, only the first match is
|
|
* returned (as a list with a single object).
|
|
*
|
|
* Returns: a GList of features, g_list_free after use.
|
|
*/
|
|
GList *
|
|
gst_plugin_list_feature_filter (GList * list,
|
|
GstPluginFeatureFilter filter, gboolean first, gpointer user_data)
|
|
{
|
|
FeatureFilterData data;
|
|
GList *result;
|
|
|
|
data.filter = filter;
|
|
data.first = first;
|
|
data.user_data = user_data;
|
|
data.result = NULL;
|
|
|
|
result = gst_filter_run (list, (GstFilterFunc) _feature_filter, first, &data);
|
|
g_list_free (result);
|
|
|
|
return data.result;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_find_feature:
|
|
* @plugin: plugin to get the feature from
|
|
* @name: The name of the feature to find
|
|
* @type: The type of the feature to find
|
|
*
|
|
* Find a feature of the given name and type in the given plugin.
|
|
*
|
|
* Returns: a GstPluginFeature or %NULL if the feature was not found.
|
|
*/
|
|
GstPluginFeature *
|
|
gst_plugin_find_feature (GstPlugin * plugin, const gchar * name, GType type)
|
|
{
|
|
GList *walk;
|
|
GstPluginFeature *result = NULL;
|
|
GstTypeNameData data;
|
|
|
|
g_return_val_if_fail (name != NULL, NULL);
|
|
|
|
data.type = type;
|
|
data.name = name;
|
|
|
|
walk = gst_filter_run (plugin->features,
|
|
(GstFilterFunc) gst_plugin_feature_type_name_filter, TRUE, &data);
|
|
|
|
if (walk) {
|
|
result = GST_PLUGIN_FEATURE (walk->data);
|
|
|
|
gst_object_ref (result);
|
|
gst_plugin_feature_list_free (walk);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
#endif
|
|
|
|
#if 0
|
|
static gboolean
|
|
gst_plugin_feature_name_filter (GstPluginFeature * feature, const gchar * name)
|
|
{
|
|
return !strcmp (name, GST_PLUGIN_FEATURE_NAME (feature));
|
|
}
|
|
#endif
|
|
|
|
#if 0
|
|
/**
|
|
* gst_plugin_find_feature_by_name:
|
|
* @plugin: plugin to get the feature from
|
|
* @name: The name of the feature to find
|
|
*
|
|
* Find a feature of the given name in the given plugin.
|
|
*
|
|
* Returns: a GstPluginFeature or %NULL if the feature was not found.
|
|
*/
|
|
GstPluginFeature *
|
|
gst_plugin_find_feature_by_name (GstPlugin * plugin, const gchar * name)
|
|
{
|
|
GList *walk;
|
|
GstPluginFeature *result = NULL;
|
|
|
|
g_return_val_if_fail (name != NULL, NULL);
|
|
|
|
walk = gst_filter_run (plugin->features,
|
|
(GstFilterFunc) gst_plugin_feature_name_filter, TRUE, (void *) name);
|
|
|
|
if (walk) {
|
|
result = GST_PLUGIN_FEATURE (walk->data);
|
|
|
|
gst_object_ref (result);
|
|
gst_plugin_feature_list_free (walk);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* gst_plugin_load_by_name:
|
|
* @name: name of plugin to load
|
|
*
|
|
* Load the named plugin. Refs the plugin.
|
|
*
|
|
* Returns: (transfer full) (nullable): a reference to a loaded plugin, or
|
|
* %NULL on error.
|
|
*/
|
|
GstPlugin *
|
|
gst_plugin_load_by_name (const gchar * name)
|
|
{
|
|
GstPlugin *plugin, *newplugin;
|
|
GError *error = NULL;
|
|
|
|
GST_DEBUG ("looking up plugin %s in default registry", name);
|
|
plugin = gst_registry_find_plugin (gst_registry_get (), name);
|
|
if (plugin) {
|
|
GST_DEBUG ("loading plugin %s from file %s", name, plugin->filename);
|
|
newplugin = gst_plugin_load_file (plugin->filename, &error);
|
|
gst_object_unref (plugin);
|
|
|
|
if (!newplugin) {
|
|
GST_WARNING ("load_plugin error: %s", error->message);
|
|
g_error_free (error);
|
|
return NULL;
|
|
}
|
|
/* newplugin was reffed by load_file */
|
|
return newplugin;
|
|
}
|
|
|
|
GST_DEBUG ("Could not find plugin %s in registry", name);
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_load:
|
|
* @plugin: (transfer none): plugin to load
|
|
*
|
|
* Loads @plugin. Note that the *return value* is the loaded plugin; @plugin is
|
|
* untouched. The normal use pattern of this function goes like this:
|
|
*
|
|
* |[
|
|
* GstPlugin *loaded_plugin;
|
|
* loaded_plugin = gst_plugin_load (plugin);
|
|
* // presumably, we're no longer interested in the potentially-unloaded plugin
|
|
* gst_object_unref (plugin);
|
|
* plugin = loaded_plugin;
|
|
* ]|
|
|
*
|
|
* Returns: (transfer full) (nullable): a reference to a loaded plugin, or
|
|
* %NULL on error.
|
|
*/
|
|
GstPlugin *
|
|
gst_plugin_load (GstPlugin * plugin)
|
|
{
|
|
GError *error = NULL;
|
|
GstPlugin *newplugin;
|
|
|
|
if (gst_plugin_is_loaded (plugin)) {
|
|
return gst_object_ref (plugin);
|
|
}
|
|
|
|
if (!(newplugin = gst_plugin_load_file (plugin->filename, &error)))
|
|
goto load_error;
|
|
|
|
return newplugin;
|
|
|
|
load_error:
|
|
{
|
|
GST_WARNING ("load_plugin error: %s", error->message);
|
|
g_error_free (error);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_list_free:
|
|
* @list: (transfer full) (element-type Gst.Plugin): list of #GstPlugin
|
|
*
|
|
* Unrefs each member of @list, then frees the list.
|
|
*/
|
|
void
|
|
gst_plugin_list_free (GList * list)
|
|
{
|
|
GList *g;
|
|
|
|
for (g = list; g; g = g->next) {
|
|
gst_object_unref (GST_PLUGIN_CAST (g->data));
|
|
}
|
|
g_list_free (list);
|
|
}
|
|
|
|
/* ===== plugin dependencies ===== */
|
|
|
|
/* Scenarios:
|
|
* ENV + xyz where ENV can contain multiple values separated by SEPARATOR
|
|
* xyz may be "" (if ENV contains path to file rather than dir)
|
|
* ENV + *xyz same as above, but xyz acts as suffix filter
|
|
* ENV + xyz* same as above, but xyz acts as prefix filter (is this needed?)
|
|
* ENV + *xyz* same as above, but xyz acts as strstr filter (is this needed?)
|
|
*
|
|
* same as above, with additional paths hard-coded at compile-time:
|
|
* - only check paths + ... if ENV is not set or yields not paths
|
|
* - always check paths + ... in addition to ENV
|
|
*
|
|
* When user specifies set of environment variables, he/she may also use e.g.
|
|
* "HOME/.mystuff/plugins", and we'll expand the content of $HOME with the
|
|
* remainder
|
|
*/
|
|
|
|
/* we store in registry:
|
|
* sets of:
|
|
* {
|
|
* - environment variables (array of strings)
|
|
* - last hash of env variable contents (uint) (so we can avoid doing stats
|
|
* if one of the env vars has changed; premature optimisation galore)
|
|
* - hard-coded paths (array of strings)
|
|
* - xyz filename/suffix/prefix strings (array of strings)
|
|
* - flags (int)
|
|
* - last hash of file/dir stats (int)
|
|
* }
|
|
* (= struct GstPluginDep)
|
|
*/
|
|
|
|
static guint
|
|
gst_plugin_ext_dep_get_env_vars_hash (GstPlugin * plugin, GstPluginDep * dep)
|
|
{
|
|
gchar **e;
|
|
guint hash;
|
|
|
|
/* there's no deeper logic to what we do here; all we want to know (when
|
|
* checking if the plugin needs to be rescanned) is whether the content of
|
|
* one of the environment variables in the list is different from when it
|
|
* was last scanned */
|
|
hash = 0;
|
|
for (e = dep->env_vars; e != NULL && *e != NULL; ++e) {
|
|
const gchar *val;
|
|
gchar env_var[256];
|
|
|
|
/* order matters: "val",NULL needs to yield a different hash than
|
|
* NULL,"val", so do a shift here whether the var is set or not */
|
|
hash = hash << 5;
|
|
|
|
/* want environment variable at beginning of string */
|
|
if (!g_ascii_isalnum (**e)) {
|
|
GST_WARNING_OBJECT (plugin, "string prefix is not a valid environment "
|
|
"variable string: %s", *e);
|
|
continue;
|
|
}
|
|
|
|
/* user is allowed to specify e.g. "HOME/.pitivi/plugins" */
|
|
g_strlcpy (env_var, *e, sizeof (env_var));
|
|
g_strdelimit (env_var, "/\\", '\0');
|
|
|
|
if ((val = g_getenv (env_var)))
|
|
hash += g_str_hash (val);
|
|
}
|
|
|
|
return hash;
|
|
}
|
|
|
|
gboolean
|
|
_priv_plugin_deps_env_vars_changed (GstPlugin * plugin)
|
|
{
|
|
GList *l;
|
|
|
|
for (l = plugin->priv->deps; l != NULL; l = l->next) {
|
|
GstPluginDep *dep = l->data;
|
|
|
|
if (dep->env_hash != gst_plugin_ext_dep_get_env_vars_hash (plugin, dep))
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
gst_plugin_ext_dep_extract_env_vars_paths (GstPlugin * plugin,
|
|
GstPluginDep * dep, GQueue * paths)
|
|
{
|
|
gchar **evars;
|
|
|
|
for (evars = dep->env_vars; evars != NULL && *evars != NULL; ++evars) {
|
|
const gchar *e;
|
|
gchar **components;
|
|
|
|
/* want environment variable at beginning of string */
|
|
if (!g_ascii_isalnum (**evars)) {
|
|
GST_WARNING_OBJECT (plugin, "string prefix is not a valid environment "
|
|
"variable string: %s", *evars);
|
|
continue;
|
|
}
|
|
|
|
/* user is allowed to specify e.g. "HOME/.pitivi/plugins", which we want to
|
|
* split into the env_var name component and the path component */
|
|
components = g_strsplit_set (*evars, "/\\", 2);
|
|
g_assert (components != NULL);
|
|
|
|
e = g_getenv (components[0]);
|
|
GST_LOG_OBJECT (plugin, "expanding %s = '%s' (path suffix: %s)",
|
|
components[0], GST_STR_NULL (e), GST_STR_NULL (components[1]));
|
|
|
|
if (components[1] != NULL) {
|
|
g_strdelimit (components[1], "/\\", G_DIR_SEPARATOR);
|
|
}
|
|
|
|
if (e != NULL && *e != '\0') {
|
|
gchar **arr;
|
|
guint i;
|
|
|
|
arr = g_strsplit (e, G_SEARCHPATH_SEPARATOR_S, -1);
|
|
|
|
for (i = 0; arr != NULL && arr[i] != NULL; ++i) {
|
|
gchar *full_path;
|
|
|
|
if (!g_path_is_absolute (arr[i])) {
|
|
GST_INFO_OBJECT (plugin, "ignoring environment variable content '%s'"
|
|
": either not an absolute path or not a path at all", arr[i]);
|
|
continue;
|
|
}
|
|
|
|
if (components[1] != NULL) {
|
|
full_path = g_build_filename (arr[i], components[1], NULL);
|
|
} else {
|
|
full_path = g_strdup (arr[i]);
|
|
}
|
|
|
|
if (!g_queue_find_custom (paths, full_path, (GCompareFunc) strcmp)) {
|
|
GST_LOG_OBJECT (plugin, "path: '%s'", full_path);
|
|
g_queue_push_tail (paths, full_path);
|
|
full_path = NULL;
|
|
} else {
|
|
GST_LOG_OBJECT (plugin, "path: '%s' (duplicate,ignoring)", full_path);
|
|
g_free (full_path);
|
|
}
|
|
}
|
|
|
|
g_strfreev (arr);
|
|
}
|
|
|
|
g_strfreev (components);
|
|
}
|
|
|
|
GST_LOG_OBJECT (plugin, "Extracted %d paths from environment", paths->length);
|
|
}
|
|
|
|
static guint
|
|
gst_plugin_ext_dep_get_hash_from_stat_entry (GStatBuf * s)
|
|
{
|
|
#ifdef S_IFBLK
|
|
if (!(s->st_mode & (S_IFDIR | S_IFREG | S_IFBLK | S_IFCHR)))
|
|
#else
|
|
/* MSVC does not have S_IFBLK */
|
|
if (!(s->st_mode & (S_IFDIR | S_IFREG | S_IFCHR)))
|
|
#endif
|
|
return (guint) - 1;
|
|
|
|
/* completely random formula */
|
|
return ((s->st_size << 3) + (s->st_mtime << 5)) ^ s->st_ctime;
|
|
}
|
|
|
|
static gboolean
|
|
gst_plugin_ext_dep_direntry_matches (GstPlugin * plugin, const gchar * entry,
|
|
const gchar ** filenames, GstPluginDependencyFlags flags)
|
|
{
|
|
/* no filenames specified, match all entries for now (could probably
|
|
* optimise by just taking the dir stat hash or so) */
|
|
if (filenames == NULL || *filenames == NULL || **filenames == '\0')
|
|
return TRUE;
|
|
|
|
while (*filenames != NULL) {
|
|
/* suffix match? */
|
|
if (((flags & GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_SUFFIX)) &&
|
|
g_str_has_suffix (entry, *filenames)) {
|
|
return TRUE;
|
|
} else if (((flags & GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_PREFIX)) &&
|
|
g_str_has_prefix (entry, *filenames)) {
|
|
return TRUE;
|
|
/* else it's an exact match that's needed */
|
|
} else if (strcmp (entry, *filenames) == 0) {
|
|
return TRUE;
|
|
}
|
|
GST_LOG ("%s does not match %s, flags=0x%04x", entry, *filenames, flags);
|
|
++filenames;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
static guint
|
|
gst_plugin_ext_dep_scan_dir_and_match_names (GstPlugin * plugin,
|
|
const gchar * path, const gchar ** filenames,
|
|
GstPluginDependencyFlags flags, int depth)
|
|
{
|
|
const gchar *entry;
|
|
gboolean recurse_dirs;
|
|
GError *err = NULL;
|
|
GDir *dir;
|
|
guint hash = 0;
|
|
|
|
recurse_dirs = ! !(flags & GST_PLUGIN_DEPENDENCY_FLAG_RECURSE);
|
|
|
|
dir = g_dir_open (path, 0, &err);
|
|
if (dir == NULL) {
|
|
GST_DEBUG_OBJECT (plugin, "g_dir_open(%s) failed: %s", path, err->message);
|
|
g_error_free (err);
|
|
return (guint) - 1;
|
|
}
|
|
|
|
/* FIXME: we're assuming here that we always get the directory entries in
|
|
* the same order, and not in a random order */
|
|
while ((entry = g_dir_read_name (dir))) {
|
|
gboolean have_match;
|
|
GStatBuf s;
|
|
gchar *full_path;
|
|
guint fhash;
|
|
|
|
have_match =
|
|
gst_plugin_ext_dep_direntry_matches (plugin, entry, filenames, flags);
|
|
|
|
/* avoid the stat if possible */
|
|
if (!have_match && !recurse_dirs)
|
|
continue;
|
|
|
|
full_path = g_build_filename (path, entry, NULL);
|
|
if (g_stat (full_path, &s) < 0) {
|
|
fhash = (guint) - 1;
|
|
GST_LOG_OBJECT (plugin, "stat: %s (error: %s)", full_path,
|
|
g_strerror (errno));
|
|
} else if (have_match) {
|
|
fhash = gst_plugin_ext_dep_get_hash_from_stat_entry (&s);
|
|
GST_LOG_OBJECT (plugin, "stat: %s (result: %u)", full_path, fhash);
|
|
} else if ((s.st_mode & (S_IFDIR))) {
|
|
fhash = gst_plugin_ext_dep_scan_dir_and_match_names (plugin, full_path,
|
|
filenames, flags, depth + 1);
|
|
} else {
|
|
/* it's not a name match, we want to recurse, but it's not a directory */
|
|
g_free (full_path);
|
|
continue;
|
|
}
|
|
|
|
hash = hash + fhash;
|
|
g_free (full_path);
|
|
}
|
|
|
|
g_dir_close (dir);
|
|
return hash;
|
|
}
|
|
|
|
static guint
|
|
gst_plugin_ext_dep_scan_path_with_filenames (GstPlugin * plugin,
|
|
const gchar * path, const gchar ** filenames,
|
|
GstPluginDependencyFlags flags)
|
|
{
|
|
const gchar *empty_filenames[] = { "", NULL };
|
|
gboolean recurse_into_dirs, partial_names = FALSE;
|
|
guint i, hash = 0;
|
|
|
|
/* to avoid special-casing below (FIXME?) */
|
|
if (filenames == NULL || *filenames == NULL)
|
|
filenames = empty_filenames;
|
|
|
|
recurse_into_dirs = ! !(flags & GST_PLUGIN_DEPENDENCY_FLAG_RECURSE);
|
|
|
|
if ((flags & GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_SUFFIX) ||
|
|
(flags & GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_PREFIX))
|
|
partial_names = TRUE;
|
|
|
|
/* if we can construct the exact paths to check with the data we have, just
|
|
* stat them one by one; this is more efficient than opening the directory
|
|
* and going through each entry to see if it matches one of our filenames. */
|
|
if (!recurse_into_dirs && !partial_names) {
|
|
for (i = 0; filenames[i] != NULL; ++i) {
|
|
GStatBuf s;
|
|
gchar *full_path;
|
|
guint fhash;
|
|
|
|
full_path = g_build_filename (path, filenames[i], NULL);
|
|
if (g_stat (full_path, &s) < 0) {
|
|
fhash = (guint) - 1;
|
|
GST_LOG_OBJECT (plugin, "stat: %s (error: %s)", full_path,
|
|
g_strerror (errno));
|
|
} else {
|
|
fhash = gst_plugin_ext_dep_get_hash_from_stat_entry (&s);
|
|
GST_LOG_OBJECT (plugin, "stat: %s (result: %08x)", full_path, fhash);
|
|
}
|
|
hash += fhash;
|
|
g_free (full_path);
|
|
}
|
|
} else {
|
|
hash = gst_plugin_ext_dep_scan_dir_and_match_names (plugin, path,
|
|
filenames, flags, 0);
|
|
}
|
|
|
|
return hash;
|
|
}
|
|
|
|
static guint
|
|
gst_plugin_ext_dep_get_stat_hash (GstPlugin * plugin, GstPluginDep * dep)
|
|
{
|
|
gboolean paths_are_default_only;
|
|
gboolean paths_are_relative_to_exe;
|
|
GQueue scan_paths = G_QUEUE_INIT;
|
|
guint scan_hash = 0;
|
|
gchar *path;
|
|
|
|
GST_LOG_OBJECT (plugin, "start");
|
|
|
|
paths_are_default_only =
|
|
dep->flags & GST_PLUGIN_DEPENDENCY_FLAG_PATHS_ARE_DEFAULT_ONLY;
|
|
paths_are_relative_to_exe =
|
|
dep->flags & GST_PLUGIN_DEPENDENCY_FLAG_PATHS_ARE_RELATIVE_TO_EXE;
|
|
|
|
gst_plugin_ext_dep_extract_env_vars_paths (plugin, dep, &scan_paths);
|
|
|
|
if (g_queue_is_empty (&scan_paths) || !paths_are_default_only) {
|
|
gchar **paths;
|
|
|
|
for (paths = dep->paths; paths != NULL && *paths != NULL; ++paths) {
|
|
const gchar *path = *paths;
|
|
gchar *full_path;
|
|
|
|
if (paths_are_relative_to_exe && !g_path_is_absolute (path)) {
|
|
gchar *appdir;
|
|
|
|
if (!_gst_executable_path) {
|
|
GST_FIXME_OBJECT (plugin,
|
|
"Path dependency %s relative to executable path but could not retrieve executable path",
|
|
path);
|
|
continue;
|
|
}
|
|
appdir = g_path_get_dirname (_gst_executable_path);
|
|
full_path = g_build_filename (appdir, path, NULL);
|
|
g_free (appdir);
|
|
} else {
|
|
full_path = g_strdup (path);
|
|
}
|
|
|
|
if (!g_queue_find_custom (&scan_paths, full_path, (GCompareFunc) strcmp)) {
|
|
GST_LOG_OBJECT (plugin, "path: '%s'", full_path);
|
|
g_queue_push_tail (&scan_paths, full_path);
|
|
} else {
|
|
GST_LOG_OBJECT (plugin, "path: '%s' (duplicate, ignoring)", full_path);
|
|
g_free (full_path);
|
|
}
|
|
}
|
|
}
|
|
|
|
while ((path = g_queue_pop_head (&scan_paths))) {
|
|
scan_hash += gst_plugin_ext_dep_scan_path_with_filenames (plugin, path,
|
|
(const gchar **) dep->names, dep->flags);
|
|
g_free (path);
|
|
}
|
|
|
|
GST_LOG_OBJECT (plugin, "done, scan_hash: %08x", scan_hash);
|
|
return scan_hash;
|
|
}
|
|
|
|
gboolean
|
|
_priv_plugin_deps_files_changed (GstPlugin * plugin)
|
|
{
|
|
GList *l;
|
|
|
|
for (l = plugin->priv->deps; l != NULL; l = l->next) {
|
|
GstPluginDep *dep = l->data;
|
|
|
|
if (dep->stat_hash != gst_plugin_ext_dep_get_stat_hash (plugin, dep))
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
gst_plugin_ext_dep_free (GstPluginDep * dep)
|
|
{
|
|
g_strfreev (dep->env_vars);
|
|
g_strfreev (dep->paths);
|
|
g_strfreev (dep->names);
|
|
g_slice_free (GstPluginDep, dep);
|
|
}
|
|
|
|
static gboolean
|
|
gst_plugin_ext_dep_strv_equal (gchar ** arr1, gchar ** arr2)
|
|
{
|
|
if (arr1 == arr2)
|
|
return TRUE;
|
|
if (arr1 == NULL || arr2 == NULL)
|
|
return FALSE;
|
|
for (; *arr1 != NULL && *arr2 != NULL; ++arr1, ++arr2) {
|
|
if (strcmp (*arr1, *arr2) != 0)
|
|
return FALSE;
|
|
}
|
|
return (*arr1 == *arr2);
|
|
}
|
|
|
|
static gboolean
|
|
gst_plugin_ext_dep_equals (GstPluginDep * dep, const gchar ** env_vars,
|
|
const gchar ** paths, const gchar ** names, GstPluginDependencyFlags flags)
|
|
{
|
|
if (dep->flags != flags)
|
|
return FALSE;
|
|
|
|
return gst_plugin_ext_dep_strv_equal (dep->env_vars, (gchar **) env_vars) &&
|
|
gst_plugin_ext_dep_strv_equal (dep->paths, (gchar **) paths) &&
|
|
gst_plugin_ext_dep_strv_equal (dep->names, (gchar **) names);
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_add_dependency:
|
|
* @plugin: a #GstPlugin
|
|
* @env_vars: (allow-none) (array zero-terminated=1): %NULL-terminated array of environment variables affecting the
|
|
* feature set of the plugin (e.g. an environment variable containing
|
|
* paths where to look for additional modules/plugins of a library),
|
|
* or %NULL. Environment variable names may be followed by a path component
|
|
* which will be added to the content of the environment variable, e.g.
|
|
* "HOME/.mystuff/plugins".
|
|
* @paths: (allow-none) (array zero-terminated=1): %NULL-terminated array of directories/paths where dependent files
|
|
* may be, or %NULL.
|
|
* @names: (allow-none) (array zero-terminated=1): %NULL-terminated array of file names (or file name suffixes,
|
|
* depending on @flags) to be used in combination with the paths from
|
|
* @paths and/or the paths extracted from the environment variables in
|
|
* @env_vars, or %NULL.
|
|
* @flags: optional flags, or #GST_PLUGIN_DEPENDENCY_FLAG_NONE
|
|
*
|
|
* Make GStreamer aware of external dependencies which affect the feature
|
|
* set of this plugin (ie. the elements or typefinders associated with it).
|
|
*
|
|
* GStreamer will re-inspect plugins with external dependencies whenever any
|
|
* of the external dependencies change. This is useful for plugins which wrap
|
|
* other plugin systems, e.g. a plugin which wraps a plugin-based visualisation
|
|
* library and makes visualisations available as GStreamer elements, or a
|
|
* codec loader which exposes elements and/or caps dependent on what external
|
|
* codec libraries are currently installed.
|
|
*/
|
|
void
|
|
gst_plugin_add_dependency (GstPlugin * plugin, const gchar ** env_vars,
|
|
const gchar ** paths, const gchar ** names, GstPluginDependencyFlags flags)
|
|
{
|
|
GstPluginDep *dep;
|
|
GList *l;
|
|
|
|
g_return_if_fail (GST_IS_PLUGIN (plugin));
|
|
|
|
if ((env_vars == NULL || env_vars[0] == NULL) &&
|
|
(paths == NULL || paths[0] == NULL)) {
|
|
GST_DEBUG_OBJECT (plugin,
|
|
"plugin registered empty dependency set. Ignoring");
|
|
return;
|
|
}
|
|
|
|
for (l = plugin->priv->deps; l != NULL; l = l->next) {
|
|
if (gst_plugin_ext_dep_equals (l->data, env_vars, paths, names, flags)) {
|
|
GST_LOG_OBJECT (plugin, "dependency already registered");
|
|
return;
|
|
}
|
|
}
|
|
|
|
dep = g_slice_new (GstPluginDep);
|
|
|
|
dep->env_vars = g_strdupv ((gchar **) env_vars);
|
|
dep->paths = g_strdupv ((gchar **) paths);
|
|
dep->names = g_strdupv ((gchar **) names);
|
|
dep->flags = flags;
|
|
|
|
dep->env_hash = gst_plugin_ext_dep_get_env_vars_hash (plugin, dep);
|
|
dep->stat_hash = gst_plugin_ext_dep_get_stat_hash (plugin, dep);
|
|
|
|
plugin->priv->deps = g_list_append (plugin->priv->deps, dep);
|
|
|
|
GST_DEBUG_OBJECT (plugin, "added dependency:");
|
|
for (; env_vars != NULL && *env_vars != NULL; ++env_vars)
|
|
GST_DEBUG_OBJECT (plugin, " evar: %s", *env_vars);
|
|
for (; paths != NULL && *paths != NULL; ++paths)
|
|
GST_DEBUG_OBJECT (plugin, " path: %s", *paths);
|
|
for (; names != NULL && *names != NULL; ++names)
|
|
GST_DEBUG_OBJECT (plugin, " name: %s", *names);
|
|
}
|
|
|
|
/**
|
|
* gst_plugin_add_dependency_simple:
|
|
* @plugin: the #GstPlugin
|
|
* @env_vars: (allow-none): one or more environment variables (separated by ':', ';' or ','),
|
|
* or %NULL. Environment variable names may be followed by a path component
|
|
* which will be added to the content of the environment variable, e.g.
|
|
* "HOME/.mystuff/plugins:MYSTUFF_PLUGINS_PATH"
|
|
* @paths: (allow-none): one ore more directory paths (separated by ':' or ';' or ','),
|
|
* or %NULL. Example: "/usr/lib/mystuff/plugins"
|
|
* @names: (allow-none): one or more file names or file name suffixes (separated by commas),
|
|
* or %NULL
|
|
* @flags: optional flags, or #GST_PLUGIN_DEPENDENCY_FLAG_NONE
|
|
*
|
|
* Make GStreamer aware of external dependencies which affect the feature
|
|
* set of this plugin (ie. the elements or typefinders associated with it).
|
|
*
|
|
* GStreamer will re-inspect plugins with external dependencies whenever any
|
|
* of the external dependencies change. This is useful for plugins which wrap
|
|
* other plugin systems, e.g. a plugin which wraps a plugin-based visualisation
|
|
* library and makes visualisations available as GStreamer elements, or a
|
|
* codec loader which exposes elements and/or caps dependent on what external
|
|
* codec libraries are currently installed.
|
|
*
|
|
* Convenience wrapper function for gst_plugin_add_dependency() which
|
|
* takes simple strings as arguments instead of string arrays, with multiple
|
|
* arguments separated by predefined delimiters (see above).
|
|
*/
|
|
void
|
|
gst_plugin_add_dependency_simple (GstPlugin * plugin,
|
|
const gchar * env_vars, const gchar * paths, const gchar * names,
|
|
GstPluginDependencyFlags flags)
|
|
{
|
|
gchar **a_evars = NULL;
|
|
gchar **a_paths = NULL;
|
|
gchar **a_names = NULL;
|
|
|
|
if (env_vars)
|
|
a_evars = g_strsplit_set (env_vars, ":;,", -1);
|
|
if (paths)
|
|
a_paths = g_strsplit_set (paths, ":;,", -1);
|
|
if (names)
|
|
a_names = g_strsplit_set (names, ",", -1);
|
|
|
|
gst_plugin_add_dependency (plugin, (const gchar **) a_evars,
|
|
(const gchar **) a_paths, (const gchar **) a_names, flags);
|
|
|
|
if (a_evars)
|
|
g_strfreev (a_evars);
|
|
if (a_paths)
|
|
g_strfreev (a_paths);
|
|
if (a_names)
|
|
g_strfreev (a_names);
|
|
}
|