mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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684796f45a
Instead of guessing something based on preprocessor defines and magic.
1866 lines
55 KiB
C
1866 lines
55 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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* 2005 David A. Schleef <ds@schleef.org>
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*
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* gstregistry.c: handle registry
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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:gstregistry
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* @title: GstRegistry
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* @short_description: Abstract base class for management of #GstPlugin objects
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* @see_also: #GstPlugin, #GstPluginFeature
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*
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* One registry holds the metadata of a set of plugins.
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*
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* <emphasis role="bold">Design:</emphasis>
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*
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* The #GstRegistry object is a list of plugins and some functions for dealing
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* with them. Each #GstPlugin is matched 1-1 with a file on disk, and may or may
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* not be loaded at a given time.
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*
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* The primary source, at all times, of plugin information is each plugin file
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* itself. Thus, if an application wants information about a particular plugin,
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* or wants to search for a feature that satisfies given criteria, the primary
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* means of doing so is to load every plugin and look at the resulting
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* information that is gathered in the default registry. Clearly, this is a time
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* consuming process, so we cache information in the registry file. The format
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* and location of the cache file is internal to gstreamer.
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*
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* On startup, plugins are searched for in the plugin search path. The following
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* locations are checked in this order:
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*
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* * location from --gst-plugin-path commandline option.
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* * the GST_PLUGIN_PATH environment variable.
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* * the GST_PLUGIN_SYSTEM_PATH environment variable.
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* * default locations (if GST_PLUGIN_SYSTEM_PATH is not set).
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* Those default locations are:
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* `$XDG_DATA_HOME/gstreamer-$GST_API_VERSION/plugins/`
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* and `$prefix/libs/gstreamer-$GST_API_VERSION/`.
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* [$XDG_DATA_HOME](http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html) defaults to
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* `$HOME/.local/share`.
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*
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* The registry cache file is loaded from
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* `$XDG_CACHE_HOME/gstreamer-$GST_API_VERSION/registry-$ARCH.bin`
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* (where $XDG_CACHE_HOME defaults to `$HOME/.cache`) or the file listed in the `GST_REGISTRY`
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* env var. One reason to change the registry location is for testing.
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*
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* For each plugin that is found in the plugin search path, there could be 3
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* possibilities for cached information:
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*
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* * the cache may not contain information about a given file.
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* * the cache may have stale information.
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* * the cache may have current information.
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*
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* In the first two cases, the plugin is loaded and the cache updated. In
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* addition to these cases, the cache may have entries for plugins that are not
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* relevant to the current process. These are marked as not available to the
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* current process. If the cache is updated for whatever reason, it is marked
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* dirty.
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*
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* A dirty cache is written out at the end of initialization. Each entry is
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* checked to make sure the information is minimally valid. If not, the entry is
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* simply dropped.
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*
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* ## Implementation notes:
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*
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* The "cache" and "registry" are different concepts and can represent
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* different sets of plugins. For various reasons, at init time, the cache is
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* stored in the default registry, and plugins not relevant to the current
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* process are marked with the %GST_PLUGIN_FLAG_CACHED bit. These plugins are
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* removed at the end of initialization.
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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 "gstconfig.h"
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#include "gst_private.h"
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#include <glib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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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 <errno.h>
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#include <stdio.h>
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#include <string.h>
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/* For g_stat () */
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#include <glib/gstdio.h>
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#include "gstinfo.h"
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#include "gsterror.h"
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#include "gstregistry.h"
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#include "gstdeviceproviderfactory.h"
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#include "gstpluginloader.h"
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#include "gst-i18n-lib.h"
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#include "gst.h"
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#include "glib-compat-private.h"
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#ifdef G_OS_WIN32
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#include <windows.h>
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extern HMODULE _priv_gst_dll_handle;
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#endif
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#define GST_CAT_DEFAULT GST_CAT_REGISTRY
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struct _GstRegistryPrivate
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{
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GList *plugins;
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GList *features;
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guint n_plugins;
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#if 0
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GList *paths;
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#endif
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int cache_file;
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/* hash to speedup _lookup_feature_locked() */
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GHashTable *feature_hash;
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/* hash to speedup _lookup */
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GHashTable *basename_hash;
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/* updated whenever the feature list changes */
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guint32 cookie;
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/* speedup for searching features */
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GList *element_factory_list;
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guint32 efl_cookie;
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GList *typefind_factory_list;
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guint32 tfl_cookie;
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GList *device_provider_factory_list;
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guint32 dmfl_cookie;
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};
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/* the one instance of the default registry and the mutex protecting the
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* variable. */
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static GMutex _gst_registry_mutex;
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static GstRegistry *_gst_registry_default = NULL;
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/* defaults */
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#define DEFAULT_FORK TRUE
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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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/* List of plugins that need preloading/reloading after scanning registry */
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extern GSList *_priv_gst_preload_plugins;
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#ifndef GST_DISABLE_REGISTRY
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/* Set to TRUE to disable registry, behaves similar to GST_DISABLE_REGISTRY */
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gboolean _priv_gst_disable_registry = FALSE;
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/*set to TRUE when registry needn't to be updated */
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gboolean _priv_gst_disable_registry_update = FALSE;
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extern GList *_priv_gst_plugin_paths;
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/* Set to TRUE when the registry cache should be disabled */
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gboolean _gst_disable_registry_cache = FALSE;
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static gboolean __registry_reuse_plugin_scanner = TRUE;
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#endif
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/* Element signals and args */
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enum
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{
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PLUGIN_ADDED,
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FEATURE_ADDED,
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LAST_SIGNAL
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};
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static void gst_registry_finalize (GObject * object);
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static guint gst_registry_signals[LAST_SIGNAL] = { 0 };
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static GstPluginFeature *gst_registry_lookup_feature_locked (GstRegistry *
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registry, const char *name);
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static GstPlugin *gst_registry_lookup_bn_locked (GstRegistry * registry,
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const char *basename);
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#define gst_registry_parent_class parent_class
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G_DEFINE_TYPE_WITH_PRIVATE (GstRegistry, gst_registry, GST_TYPE_OBJECT);
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static void
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gst_registry_class_init (GstRegistryClass * klass)
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{
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GObjectClass *gobject_class;
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gobject_class = (GObjectClass *) klass;
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/**
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* GstRegistry::plugin-added:
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* @registry: the registry that emitted the signal
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* @plugin: the plugin that has been added
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*
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* Signals that a plugin has been added to the registry (possibly
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* replacing a previously-added one by the same name)
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*/
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gst_registry_signals[PLUGIN_ADDED] =
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g_signal_new ("plugin-added", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
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G_TYPE_NONE, 1, GST_TYPE_PLUGIN);
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/**
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* GstRegistry::feature-added:
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* @registry: the registry that emitted the signal
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* @feature: the feature that has been added
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*
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* Signals that a feature has been added to the registry (possibly
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* replacing a previously-added one by the same name)
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*/
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gst_registry_signals[FEATURE_ADDED] =
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g_signal_new ("feature-added", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
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G_TYPE_NONE, 1, GST_TYPE_PLUGIN_FEATURE);
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gobject_class->finalize = gst_registry_finalize;
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}
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static void
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gst_registry_init (GstRegistry * registry)
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{
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registry->priv = gst_registry_get_instance_private (registry);
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registry->priv->feature_hash = g_hash_table_new (g_str_hash, g_str_equal);
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registry->priv->basename_hash = g_hash_table_new (g_str_hash, g_str_equal);
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}
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static void
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gst_registry_finalize (GObject * object)
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{
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GstRegistry *registry = GST_REGISTRY (object);
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GList *plugins, *p;
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GList *features, *f;
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plugins = registry->priv->plugins;
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registry->priv->plugins = NULL;
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registry->priv->n_plugins = 0;
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GST_DEBUG_OBJECT (registry, "registry finalize");
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p = plugins;
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while (p) {
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GstPlugin *plugin = p->data;
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if (plugin) {
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GST_LOG_OBJECT (registry, "removing plugin %s",
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gst_plugin_get_name (plugin));
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gst_object_unref (plugin);
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}
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p = g_list_next (p);
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}
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g_list_free (plugins);
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features = registry->priv->features;
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registry->priv->features = NULL;
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f = features;
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while (f) {
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GstPluginFeature *feature = f->data;
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if (feature) {
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GST_LOG_OBJECT (registry, "removing feature %p (%s)", feature,
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GST_OBJECT_NAME (feature));
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gst_object_unparent (GST_OBJECT_CAST (feature));
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}
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f = g_list_next (f);
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}
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g_list_free (features);
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g_hash_table_destroy (registry->priv->feature_hash);
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registry->priv->feature_hash = NULL;
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g_hash_table_destroy (registry->priv->basename_hash);
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registry->priv->basename_hash = NULL;
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if (registry->priv->element_factory_list) {
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GST_DEBUG_OBJECT (registry, "Cleaning up cached element factory list");
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gst_plugin_feature_list_free (registry->priv->element_factory_list);
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}
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if (registry->priv->typefind_factory_list) {
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GST_DEBUG_OBJECT (registry, "Cleaning up cached typefind factory list");
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gst_plugin_feature_list_free (registry->priv->typefind_factory_list);
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}
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if (registry->priv->device_provider_factory_list) {
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GST_DEBUG_OBJECT (registry,
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"Cleaning up cached device provider factory list");
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gst_plugin_feature_list_free (registry->priv->device_provider_factory_list);
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}
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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/**
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* gst_registry_get:
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*
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* Retrieves the singleton plugin registry. The caller does not own a
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* reference on the registry, as it is alive as long as GStreamer is
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* initialized.
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*
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* Returns: (transfer none): the #GstRegistry.
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*/
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GstRegistry *
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gst_registry_get (void)
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{
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GstRegistry *registry;
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g_mutex_lock (&_gst_registry_mutex);
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if (G_UNLIKELY (!_gst_registry_default)) {
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_gst_registry_default = g_object_new (GST_TYPE_REGISTRY, NULL);
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gst_object_ref_sink (GST_OBJECT_CAST (_gst_registry_default));
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}
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registry = _gst_registry_default;
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g_mutex_unlock (&_gst_registry_mutex);
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return registry;
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}
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#if 0
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/**
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* gst_registry_add_path:
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* @registry: the registry to add the path to
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* @path: the path to add to the registry
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*
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* Add the given path to the registry. The syntax of the
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* path is specific to the registry. If the path has already been
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* added, do nothing.
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*/
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void
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gst_registry_add_path (GstRegistry * registry, const gchar * path)
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{
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g_return_if_fail (GST_IS_REGISTRY (registry));
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g_return_if_fail (path != NULL);
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if (strlen (path) == 0)
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goto empty_path;
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GST_OBJECT_LOCK (registry);
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if (g_list_find_custom (registry->priv->paths, path, (GCompareFunc) strcmp))
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goto was_added;
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GST_INFO ("Adding plugin path: \"%s\"", path);
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registry->priv->paths =
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g_list_append (registry->priv->paths, g_strdup (path));
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GST_OBJECT_UNLOCK (registry);
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return;
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empty_path:
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{
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GST_INFO ("Ignoring empty plugin path");
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return;
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}
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was_added:
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{
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g_warning ("path %s already added to registry", path);
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GST_OBJECT_UNLOCK (registry);
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return;
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}
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}
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/**
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* gst_registry_get_path_list:
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* @registry: the registry to get the pathlist of
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*
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* Get the list of paths for the given registry.
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*
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* Returns: (transfer container) (element-type char*): A #GList of paths as
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* strings. g_list_free after use.
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*
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* MT safe.
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*/
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GList *
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gst_registry_get_path_list (GstRegistry * registry)
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{
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GList *list;
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g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
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GST_OBJECT_LOCK (registry);
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/* We don't need to copy the strings, because they won't be deleted
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* as long as the GstRegistry is around */
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list = g_list_copy (registry->priv->paths);
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GST_OBJECT_UNLOCK (registry);
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return list;
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}
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#endif
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/**
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* gst_registry_add_plugin:
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* @registry: the registry to add the plugin to
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* @plugin: (transfer floating): the plugin to add
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*
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* Add the plugin to the registry. The plugin-added signal will be emitted.
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*
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* @plugin's reference count will be incremented, and any floating
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* reference will be removed (see gst_object_ref_sink())
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*
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* Returns: %TRUE on success.
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*
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* MT safe.
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*/
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gboolean
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gst_registry_add_plugin (GstRegistry * registry, GstPlugin * plugin)
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{
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GstPlugin *existing_plugin;
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g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
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g_return_val_if_fail (GST_IS_PLUGIN (plugin), FALSE);
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GST_OBJECT_LOCK (registry);
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if (G_LIKELY (plugin->basename)) {
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/* we have a basename, see if we find the plugin */
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existing_plugin =
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gst_registry_lookup_bn_locked (registry, plugin->basename);
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if (existing_plugin) {
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GST_DEBUG_OBJECT (registry,
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"Replacing existing plugin \"%s\" %p with new plugin %p for filename \"%s\"",
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GST_STR_NULL (existing_plugin->filename), existing_plugin, plugin,
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GST_STR_NULL (plugin->filename));
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/* If the new plugin is blacklisted and the existing one isn't cached, do not
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* accept if it's from a different location than the existing one */
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if (GST_OBJECT_FLAG_IS_SET (plugin, GST_PLUGIN_FLAG_BLACKLISTED) &&
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strcmp (plugin->filename, existing_plugin->filename)) {
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GST_WARNING_OBJECT (registry,
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"Not replacing plugin because new one (%s) is blacklisted but for a different location than existing one (%s)",
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plugin->filename, existing_plugin->filename);
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/* Keep reference counting consistent */
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gst_object_ref_sink (plugin);
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gst_object_unref (plugin);
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GST_OBJECT_UNLOCK (registry);
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return FALSE;
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}
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registry->priv->plugins =
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g_list_remove (registry->priv->plugins, existing_plugin);
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--registry->priv->n_plugins;
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if (G_LIKELY (existing_plugin->basename))
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g_hash_table_remove (registry->priv->basename_hash,
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existing_plugin->basename);
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gst_object_unref (existing_plugin);
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}
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}
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GST_DEBUG_OBJECT (registry, "adding plugin %p for filename \"%s\"",
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plugin, GST_STR_NULL (plugin->filename));
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registry->priv->plugins = g_list_prepend (registry->priv->plugins, plugin);
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++registry->priv->n_plugins;
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if (G_LIKELY (plugin->basename))
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g_hash_table_replace (registry->priv->basename_hash, plugin->basename,
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plugin);
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gst_object_ref_sink (plugin);
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GST_OBJECT_UNLOCK (registry);
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GST_LOG_OBJECT (registry, "emitting plugin-added for filename \"%s\"",
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GST_STR_NULL (plugin->filename));
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g_signal_emit (registry, gst_registry_signals[PLUGIN_ADDED], 0, plugin);
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return TRUE;
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}
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|
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static void
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gst_registry_remove_features_for_plugin_unlocked (GstRegistry * registry,
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GstPlugin * plugin)
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{
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GList *f;
|
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g_return_if_fail (GST_IS_REGISTRY (registry));
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g_return_if_fail (GST_IS_PLUGIN (plugin));
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/* Remove all features for this plugin */
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f = registry->priv->features;
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while (f != NULL) {
|
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GList *next = g_list_next (f);
|
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GstPluginFeature *feature = f->data;
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|
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if (G_UNLIKELY (feature && feature->plugin == plugin)) {
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GST_DEBUG_OBJECT (registry, "removing feature %p (%s) for plugin %p (%s)",
|
|
feature, gst_plugin_feature_get_name (feature), plugin,
|
|
plugin->desc.name);
|
|
|
|
registry->priv->features =
|
|
g_list_delete_link (registry->priv->features, f);
|
|
g_hash_table_remove (registry->priv->feature_hash,
|
|
GST_OBJECT_NAME (feature));
|
|
gst_object_unparent (GST_OBJECT_CAST (feature));
|
|
}
|
|
f = next;
|
|
}
|
|
registry->priv->cookie++;
|
|
}
|
|
|
|
/**
|
|
* gst_registry_remove_plugin:
|
|
* @registry: the registry to remove the plugin from
|
|
* @plugin: (transfer none): the plugin to remove
|
|
*
|
|
* Remove the plugin from the registry.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
void
|
|
gst_registry_remove_plugin (GstRegistry * registry, GstPlugin * plugin)
|
|
{
|
|
g_return_if_fail (GST_IS_REGISTRY (registry));
|
|
g_return_if_fail (GST_IS_PLUGIN (plugin));
|
|
|
|
GST_DEBUG_OBJECT (registry, "removing plugin %p (%s)",
|
|
plugin, gst_plugin_get_name (plugin));
|
|
|
|
GST_OBJECT_LOCK (registry);
|
|
registry->priv->plugins = g_list_remove (registry->priv->plugins, plugin);
|
|
--registry->priv->n_plugins;
|
|
if (G_LIKELY (plugin->basename))
|
|
g_hash_table_remove (registry->priv->basename_hash, plugin->basename);
|
|
gst_registry_remove_features_for_plugin_unlocked (registry, plugin);
|
|
GST_OBJECT_UNLOCK (registry);
|
|
gst_object_unref (plugin);
|
|
}
|
|
|
|
/**
|
|
* gst_registry_add_feature:
|
|
* @registry: the registry to add the plugin to
|
|
* @feature: (transfer floating): the feature to add
|
|
*
|
|
* Add the feature to the registry. The feature-added signal will be emitted.
|
|
*
|
|
* @feature's reference count will be incremented, and any floating
|
|
* reference will be removed (see gst_object_ref_sink())
|
|
*
|
|
* Returns: %TRUE on success.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_registry_add_feature (GstRegistry * registry, GstPluginFeature * feature)
|
|
{
|
|
GstPluginFeature *existing_feature;
|
|
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
|
|
g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), FALSE);
|
|
g_return_val_if_fail (GST_OBJECT_NAME (feature) != NULL, FALSE);
|
|
g_return_val_if_fail (feature->plugin_name != NULL, FALSE);
|
|
|
|
GST_OBJECT_LOCK (registry);
|
|
existing_feature = gst_registry_lookup_feature_locked (registry,
|
|
GST_OBJECT_NAME (feature));
|
|
if (G_UNLIKELY (existing_feature)) {
|
|
GST_DEBUG_OBJECT (registry, "replacing existing feature %p (%s)",
|
|
existing_feature, GST_OBJECT_NAME (feature));
|
|
/* Remove the existing feature from the list now, before we insert the new
|
|
* one, but don't unref yet because the hash is still storing a reference to
|
|
* it. */
|
|
registry->priv->features =
|
|
g_list_remove (registry->priv->features, existing_feature);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (registry, "adding feature %p (%s)", feature,
|
|
GST_OBJECT_NAME (feature));
|
|
|
|
registry->priv->features = g_list_prepend (registry->priv->features, feature);
|
|
g_hash_table_replace (registry->priv->feature_hash, GST_OBJECT_NAME (feature),
|
|
feature);
|
|
|
|
if (G_UNLIKELY (existing_feature)) {
|
|
/* We unref now. No need to remove the feature name from the hash table, it
|
|
* got replaced by the new feature */
|
|
gst_object_unparent (GST_OBJECT_CAST (existing_feature));
|
|
}
|
|
|
|
gst_object_set_parent (GST_OBJECT_CAST (feature), GST_OBJECT_CAST (registry));
|
|
|
|
registry->priv->cookie++;
|
|
GST_OBJECT_UNLOCK (registry);
|
|
|
|
GST_LOG_OBJECT (registry, "emitting feature-added for %s",
|
|
GST_OBJECT_NAME (feature));
|
|
g_signal_emit (registry, gst_registry_signals[FEATURE_ADDED], 0, feature);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_registry_remove_feature:
|
|
* @registry: the registry to remove the feature from
|
|
* @feature: (transfer none): the feature to remove
|
|
*
|
|
* Remove the feature from the registry.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
void
|
|
gst_registry_remove_feature (GstRegistry * registry, GstPluginFeature * feature)
|
|
{
|
|
g_return_if_fail (GST_IS_REGISTRY (registry));
|
|
g_return_if_fail (GST_IS_PLUGIN_FEATURE (feature));
|
|
|
|
GST_DEBUG_OBJECT (registry, "removing feature %p (%s)",
|
|
feature, gst_plugin_feature_get_name (feature));
|
|
|
|
GST_OBJECT_LOCK (registry);
|
|
registry->priv->features = g_list_remove (registry->priv->features, feature);
|
|
g_hash_table_remove (registry->priv->feature_hash, GST_OBJECT_NAME (feature));
|
|
registry->priv->cookie++;
|
|
GST_OBJECT_UNLOCK (registry);
|
|
|
|
gst_object_unparent ((GstObject *) feature);
|
|
}
|
|
|
|
/**
|
|
* gst_registry_plugin_filter:
|
|
* @registry: registry to query
|
|
* @filter: (scope call): the filter to use
|
|
* @first: only return first match
|
|
* @user_data: (closure): user data passed to the filter function
|
|
*
|
|
* Runs a filter against all plugins in the registry 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).
|
|
* Every plugin is reffed; use gst_plugin_list_free() after use, which
|
|
* will unref again.
|
|
*
|
|
* Returns: (transfer full) (element-type Gst.Plugin): a #GList of #GstPlugin.
|
|
* Use gst_plugin_list_free() after usage.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GList *
|
|
gst_registry_plugin_filter (GstRegistry * registry,
|
|
GstPluginFilter filter, gboolean first, gpointer user_data)
|
|
{
|
|
GstPlugin **plugins;
|
|
GList *walk, *list = NULL;
|
|
guint n_plugins, i;
|
|
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
|
|
|
|
GST_OBJECT_LOCK (registry);
|
|
n_plugins = registry->priv->n_plugins;
|
|
plugins = g_newa (GstPlugin *, n_plugins + 1);
|
|
for (walk = registry->priv->plugins, i = 0; walk != NULL; walk = walk->next)
|
|
plugins[i++] = gst_object_ref (walk->data);
|
|
GST_OBJECT_UNLOCK (registry);
|
|
|
|
for (i = 0; i < n_plugins; ++i) {
|
|
if (filter == NULL || filter (plugins[i], user_data)) {
|
|
list = g_list_prepend (list, gst_object_ref (plugins[i]));
|
|
|
|
if (first)
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < n_plugins; ++i)
|
|
gst_object_unref (plugins[i]);
|
|
|
|
return list;
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
const gchar *name;
|
|
GType type;
|
|
} GstTypeNameData;
|
|
|
|
static gboolean
|
|
gst_plugin_feature_type_name_filter (GstPluginFeature * feature,
|
|
GstTypeNameData * data)
|
|
{
|
|
g_assert (GST_IS_PLUGIN_FEATURE (feature));
|
|
|
|
return ((data->type == 0 || data->type == G_OBJECT_TYPE (feature)) &&
|
|
(data->name == NULL || !strcmp (data->name, GST_OBJECT_NAME (feature))));
|
|
}
|
|
|
|
/* returns TRUE if the list was changed
|
|
*
|
|
* Must be called with the object lock taken */
|
|
static gboolean
|
|
gst_registry_get_feature_list_or_create (GstRegistry * registry,
|
|
GList ** previous, guint32 * cookie, GType type)
|
|
{
|
|
gboolean res = FALSE;
|
|
GstRegistryPrivate *priv = registry->priv;
|
|
|
|
if (G_UNLIKELY (!*previous || priv->cookie != *cookie)) {
|
|
GstTypeNameData data;
|
|
const GList *walk;
|
|
|
|
if (*previous) {
|
|
gst_plugin_feature_list_free (*previous);
|
|
*previous = NULL;
|
|
}
|
|
|
|
data.type = type;
|
|
data.name = NULL;
|
|
|
|
for (walk = registry->priv->features; walk != NULL; walk = walk->next) {
|
|
GstPluginFeature *feature = walk->data;
|
|
|
|
if (gst_plugin_feature_type_name_filter (feature, &data)) {
|
|
*previous = g_list_prepend (*previous, gst_object_ref (feature));
|
|
}
|
|
}
|
|
|
|
*cookie = priv->cookie;
|
|
res = TRUE;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static gint
|
|
type_find_factory_rank_cmp (const GstPluginFeature * fac1,
|
|
const GstPluginFeature * fac2)
|
|
{
|
|
if (G_LIKELY (fac1->rank != fac2->rank))
|
|
return fac2->rank - fac1->rank;
|
|
|
|
/* to make the order in which things happen more deterministic,
|
|
* sort by name when the ranks are the same. */
|
|
return strcmp (GST_OBJECT_NAME (fac1), GST_OBJECT_NAME (fac2));
|
|
}
|
|
|
|
static GList *
|
|
gst_registry_get_element_factory_list (GstRegistry * registry)
|
|
{
|
|
GList *list;
|
|
|
|
GST_OBJECT_LOCK (registry);
|
|
|
|
gst_registry_get_feature_list_or_create (registry,
|
|
®istry->priv->element_factory_list, ®istry->priv->efl_cookie,
|
|
GST_TYPE_ELEMENT_FACTORY);
|
|
|
|
/* Return reffed copy */
|
|
list = gst_plugin_feature_list_copy (registry->priv->element_factory_list);
|
|
|
|
GST_OBJECT_UNLOCK (registry);
|
|
|
|
return list;
|
|
}
|
|
|
|
static GList *
|
|
gst_registry_get_typefind_factory_list (GstRegistry * registry)
|
|
{
|
|
GList *list;
|
|
|
|
GST_OBJECT_LOCK (registry);
|
|
|
|
if (G_UNLIKELY (gst_registry_get_feature_list_or_create (registry,
|
|
®istry->priv->typefind_factory_list,
|
|
®istry->priv->tfl_cookie, GST_TYPE_TYPE_FIND_FACTORY)))
|
|
registry->priv->typefind_factory_list =
|
|
g_list_sort (registry->priv->typefind_factory_list,
|
|
(GCompareFunc) type_find_factory_rank_cmp);
|
|
|
|
/* Return reffed copy */
|
|
list = gst_plugin_feature_list_copy (registry->priv->typefind_factory_list);
|
|
|
|
GST_OBJECT_UNLOCK (registry);
|
|
|
|
return list;
|
|
}
|
|
|
|
|
|
static GList *
|
|
gst_registry_get_device_provider_factory_list (GstRegistry * registry)
|
|
{
|
|
GList *list;
|
|
|
|
GST_OBJECT_LOCK (registry);
|
|
|
|
gst_registry_get_feature_list_or_create (registry,
|
|
®istry->priv->device_provider_factory_list,
|
|
®istry->priv->dmfl_cookie, GST_TYPE_DEVICE_PROVIDER_FACTORY);
|
|
|
|
/* Return reffed copy */
|
|
list =
|
|
gst_plugin_feature_list_copy (registry->
|
|
priv->device_provider_factory_list);
|
|
|
|
GST_OBJECT_UNLOCK (registry);
|
|
|
|
return list;
|
|
}
|
|
|
|
/**
|
|
* gst_registry_feature_filter:
|
|
* @registry: registry to query
|
|
* @filter: (scope call): the filter to use
|
|
* @first: only return first match
|
|
* @user_data: (closure): user data passed to the filter function
|
|
*
|
|
* Runs a filter against all features of the plugins in the registry
|
|
* 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: (transfer full) (element-type Gst.PluginFeature): a #GList of
|
|
* #GstPluginFeature. Use gst_plugin_feature_list_free() after usage.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GList *
|
|
gst_registry_feature_filter (GstRegistry * registry,
|
|
GstPluginFeatureFilter filter, gboolean first, gpointer user_data)
|
|
{
|
|
GstPluginFeature **features;
|
|
GList *walk, *list = NULL;
|
|
guint n_features, i;
|
|
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
|
|
|
|
GST_OBJECT_LOCK (registry);
|
|
n_features = g_hash_table_size (registry->priv->feature_hash);
|
|
features = g_newa (GstPluginFeature *, n_features + 1);
|
|
for (walk = registry->priv->features, i = 0; walk != NULL; walk = walk->next)
|
|
features[i++] = gst_object_ref (walk->data);
|
|
GST_OBJECT_UNLOCK (registry);
|
|
|
|
for (i = 0; i < n_features; ++i) {
|
|
if (filter == NULL || filter (features[i], user_data)) {
|
|
list = g_list_prepend (list, gst_object_ref (features[i]));
|
|
|
|
if (first)
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < n_features; ++i)
|
|
gst_object_unref (features[i]);
|
|
|
|
return list;
|
|
}
|
|
|
|
static gboolean
|
|
gst_registry_plugin_name_filter (GstPlugin * plugin, const gchar * name)
|
|
{
|
|
return (plugin->desc.name && !strcmp (plugin->desc.name, name));
|
|
}
|
|
|
|
/**
|
|
* gst_registry_find_plugin:
|
|
* @registry: the registry to search
|
|
* @name: the plugin name to find
|
|
*
|
|
* Find the plugin with the given name in the registry.
|
|
* The plugin will be reffed; caller is responsible for unreffing.
|
|
*
|
|
* Returns: (transfer full) (nullable): the plugin with the given name
|
|
* or %NULL if the plugin was not found. gst_object_unref() after
|
|
* usage.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstPlugin *
|
|
gst_registry_find_plugin (GstRegistry * registry, const gchar * name)
|
|
{
|
|
GList *walk;
|
|
GstPlugin *result = NULL;
|
|
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
|
|
g_return_val_if_fail (name != NULL, NULL);
|
|
|
|
walk = gst_registry_plugin_filter (registry,
|
|
(GstPluginFilter) gst_registry_plugin_name_filter, TRUE, (gpointer) name);
|
|
if (walk) {
|
|
result = GST_PLUGIN_CAST (walk->data);
|
|
|
|
gst_object_ref (result);
|
|
gst_plugin_list_free (walk);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_registry_find_feature:
|
|
* @registry: the registry to search
|
|
* @name: the pluginfeature name to find
|
|
* @type: the pluginfeature type to find
|
|
*
|
|
* Find the pluginfeature with the given name and type in the registry.
|
|
*
|
|
* Returns: (transfer full) (nullable): the pluginfeature with the
|
|
* given name and type or %NULL if the plugin was not
|
|
* found. gst_object_unref() after usage.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstPluginFeature *
|
|
gst_registry_find_feature (GstRegistry * registry, const gchar * name,
|
|
GType type)
|
|
{
|
|
GstPluginFeature *feature = NULL;
|
|
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
|
|
g_return_val_if_fail (name != NULL, NULL);
|
|
g_return_val_if_fail (g_type_is_a (type, GST_TYPE_PLUGIN_FEATURE), NULL);
|
|
|
|
feature = gst_registry_lookup_feature (registry, name);
|
|
if (feature && !g_type_is_a (G_TYPE_FROM_INSTANCE (feature), type)) {
|
|
gst_object_unref (feature);
|
|
feature = NULL;
|
|
}
|
|
|
|
return feature;
|
|
}
|
|
|
|
/**
|
|
* gst_registry_get_feature_list:
|
|
* @registry: a #GstRegistry
|
|
* @type: a #GType.
|
|
*
|
|
* Retrieves a #GList of #GstPluginFeature of @type.
|
|
*
|
|
* Returns: (transfer full) (element-type Gst.PluginFeature): a #GList of
|
|
* #GstPluginFeature of @type. Use gst_plugin_feature_list_free() after use
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GList *
|
|
gst_registry_get_feature_list (GstRegistry * registry, GType type)
|
|
{
|
|
GstTypeNameData data;
|
|
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
|
|
g_return_val_if_fail (g_type_is_a (type, GST_TYPE_PLUGIN_FEATURE), NULL);
|
|
|
|
/* Speed up */
|
|
if (type == GST_TYPE_ELEMENT_FACTORY)
|
|
return gst_registry_get_element_factory_list (registry);
|
|
else if (type == GST_TYPE_TYPE_FIND_FACTORY)
|
|
return gst_registry_get_typefind_factory_list (registry);
|
|
else if (type == GST_TYPE_DEVICE_PROVIDER_FACTORY)
|
|
return gst_registry_get_device_provider_factory_list (registry);
|
|
|
|
data.type = type;
|
|
data.name = NULL;
|
|
|
|
return gst_registry_feature_filter (registry,
|
|
(GstPluginFeatureFilter) gst_plugin_feature_type_name_filter,
|
|
FALSE, &data);
|
|
}
|
|
|
|
/**
|
|
* gst_registry_get_plugin_list:
|
|
* @registry: the registry to search
|
|
*
|
|
* Get a copy of all plugins registered in the given registry. The refcount
|
|
* of each element in the list in incremented.
|
|
*
|
|
* Returns: (transfer full) (element-type Gst.Plugin): a #GList of #GstPlugin.
|
|
* Use gst_plugin_list_free() after usage.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GList *
|
|
gst_registry_get_plugin_list (GstRegistry * registry)
|
|
{
|
|
GList *list;
|
|
GList *g;
|
|
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
|
|
|
|
GST_OBJECT_LOCK (registry);
|
|
list = g_list_copy (registry->priv->plugins);
|
|
for (g = list; g; g = g->next) {
|
|
gst_object_ref (GST_PLUGIN_CAST (g->data));
|
|
}
|
|
GST_OBJECT_UNLOCK (registry);
|
|
|
|
return list;
|
|
}
|
|
|
|
static GstPluginFeature *
|
|
gst_registry_lookup_feature_locked (GstRegistry * registry, const char *name)
|
|
{
|
|
return g_hash_table_lookup (registry->priv->feature_hash, name);
|
|
}
|
|
|
|
/**
|
|
* gst_registry_lookup_feature:
|
|
* @registry: a #GstRegistry
|
|
* @name: a #GstPluginFeature name
|
|
*
|
|
* Find a #GstPluginFeature with @name in @registry.
|
|
*
|
|
* Returns: (transfer full): a #GstPluginFeature with its refcount incremented,
|
|
* use gst_object_unref() after usage.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstPluginFeature *
|
|
gst_registry_lookup_feature (GstRegistry * registry, const char *name)
|
|
{
|
|
GstPluginFeature *feature;
|
|
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
|
|
g_return_val_if_fail (name != NULL, NULL);
|
|
|
|
GST_OBJECT_LOCK (registry);
|
|
feature = gst_registry_lookup_feature_locked (registry, name);
|
|
if (feature)
|
|
gst_object_ref (feature);
|
|
GST_OBJECT_UNLOCK (registry);
|
|
|
|
return feature;
|
|
}
|
|
|
|
static GstPlugin *
|
|
gst_registry_lookup_bn_locked (GstRegistry * registry, const char *basename)
|
|
{
|
|
return g_hash_table_lookup (registry->priv->basename_hash, basename);
|
|
}
|
|
|
|
static GstPlugin *
|
|
gst_registry_lookup_bn (GstRegistry * registry, const char *basename)
|
|
{
|
|
GstPlugin *plugin;
|
|
|
|
GST_OBJECT_LOCK (registry);
|
|
plugin = gst_registry_lookup_bn_locked (registry, basename);
|
|
if (plugin)
|
|
gst_object_ref (plugin);
|
|
GST_OBJECT_UNLOCK (registry);
|
|
|
|
return plugin;
|
|
}
|
|
|
|
/**
|
|
* gst_registry_lookup:
|
|
* @registry: the registry to look up in
|
|
* @filename: the name of the file to look up
|
|
*
|
|
* Look up a plugin in the given registry with the given filename.
|
|
* If found, plugin is reffed.
|
|
*
|
|
* Returns: (transfer full) (nullable): the #GstPlugin if found, or
|
|
* %NULL if not. gst_object_unref() after usage.
|
|
*/
|
|
GstPlugin *
|
|
gst_registry_lookup (GstRegistry * registry, const char *filename)
|
|
{
|
|
GstPlugin *plugin;
|
|
gchar *basename;
|
|
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
|
|
g_return_val_if_fail (filename != NULL, NULL);
|
|
|
|
basename = g_path_get_basename (filename);
|
|
if (G_UNLIKELY (basename == NULL))
|
|
return NULL;
|
|
|
|
plugin = gst_registry_lookup_bn (registry, basename);
|
|
|
|
g_free (basename);
|
|
|
|
return plugin;
|
|
}
|
|
|
|
typedef enum
|
|
{
|
|
REGISTRY_SCAN_HELPER_NOT_STARTED = 0,
|
|
REGISTRY_SCAN_HELPER_DISABLED,
|
|
REGISTRY_SCAN_HELPER_RUNNING
|
|
} GstRegistryScanHelperState;
|
|
|
|
typedef struct
|
|
{
|
|
GstRegistry *registry;
|
|
GstRegistryScanHelperState helper_state;
|
|
GstPluginLoader *helper;
|
|
gboolean changed;
|
|
} GstRegistryScanContext;
|
|
|
|
static void
|
|
init_scan_context (GstRegistryScanContext * context, GstRegistry * registry)
|
|
{
|
|
gboolean do_fork;
|
|
|
|
context->registry = registry;
|
|
|
|
/* see if forking is enabled and set up the scan helper state accordingly */
|
|
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;
|
|
}
|
|
}
|
|
|
|
if (do_fork)
|
|
context->helper_state = REGISTRY_SCAN_HELPER_NOT_STARTED;
|
|
else
|
|
context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
|
|
|
|
context->helper = NULL;
|
|
context->changed = FALSE;
|
|
}
|
|
|
|
static void
|
|
clear_scan_context (GstRegistryScanContext * context)
|
|
{
|
|
if (context->helper) {
|
|
context->changed |= _priv_gst_plugin_loader_funcs.destroy (context->helper);
|
|
context->helper = NULL;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_registry_scan_plugin_file (GstRegistryScanContext * context,
|
|
const gchar * filename, off_t file_size, time_t file_mtime)
|
|
{
|
|
gboolean changed = FALSE;
|
|
GstPlugin *newplugin = NULL;
|
|
|
|
#ifdef G_OS_WIN32
|
|
/* Disable external plugin loader on Windows until it is ported properly. */
|
|
context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
|
|
#endif
|
|
|
|
|
|
/* Have a plugin to load - see if the scan-helper needs starting */
|
|
if (context->helper_state == REGISTRY_SCAN_HELPER_NOT_STARTED) {
|
|
GST_DEBUG ("Starting plugin scanner for file %s", filename);
|
|
context->helper = _priv_gst_plugin_loader_funcs.create (context->registry);
|
|
if (context->helper != NULL)
|
|
context->helper_state = REGISTRY_SCAN_HELPER_RUNNING;
|
|
else {
|
|
GST_WARNING ("Failed starting plugin scanner. Scanning in-process");
|
|
context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
|
|
}
|
|
}
|
|
|
|
if (context->helper_state == REGISTRY_SCAN_HELPER_RUNNING) {
|
|
GST_DEBUG ("Using scan-helper to load plugin %s", filename);
|
|
if (!_priv_gst_plugin_loader_funcs.load (context->helper,
|
|
filename, file_size, file_mtime)) {
|
|
g_warning ("External plugin loader failed. This most likely means that "
|
|
"the plugin loader helper binary was not found or could not be run. "
|
|
"You might need to set the GST_PLUGIN_SCANNER environment variable "
|
|
"if your setup is unusual. This should normally not be required "
|
|
"though.");
|
|
context->helper_state = REGISTRY_SCAN_HELPER_DISABLED;
|
|
}
|
|
}
|
|
|
|
/* Check if the helper is disabled (or just got disabled above) */
|
|
if (context->helper_state == REGISTRY_SCAN_HELPER_DISABLED) {
|
|
/* Load plugin the old fashioned way... */
|
|
|
|
/* We don't use a GError here because a failure to load some shared
|
|
* objects as plugins is normal (particularly in the uninstalled case)
|
|
*/
|
|
newplugin = _priv_gst_plugin_load_file_for_registry (filename,
|
|
context->registry, NULL);
|
|
}
|
|
|
|
if (newplugin) {
|
|
GST_DEBUG_OBJECT (context->registry, "marking new plugin %p as registered",
|
|
newplugin);
|
|
newplugin->registered = TRUE;
|
|
gst_object_unref (newplugin);
|
|
changed = TRUE;
|
|
}
|
|
#ifndef GST_DISABLE_REGISTRY
|
|
if (!__registry_reuse_plugin_scanner) {
|
|
clear_scan_context (context);
|
|
context->helper_state = REGISTRY_SCAN_HELPER_NOT_STARTED;
|
|
}
|
|
#endif
|
|
|
|
return changed;
|
|
}
|
|
|
|
static gboolean
|
|
is_blacklisted_hidden_directory (const gchar * dirent)
|
|
{
|
|
if (G_LIKELY (dirent[0] != '.'))
|
|
return FALSE;
|
|
|
|
/* skip the .debug directory, these contain elf files that are not
|
|
* useful or worse, can crash dlopen () */
|
|
if (strcmp (dirent, ".debug") == 0)
|
|
return TRUE;
|
|
|
|
/* can also skip .git and .deps dirs, those won't contain useful files.
|
|
* This speeds up scanning a bit in uninstalled setups. */
|
|
if (strcmp (dirent, ".git") == 0 || strcmp (dirent, ".deps") == 0)
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_registry_scan_path_level (GstRegistryScanContext * context,
|
|
const gchar * path, int level)
|
|
{
|
|
GDir *dir;
|
|
const gchar *dirent;
|
|
gchar *filename;
|
|
GstPlugin *plugin;
|
|
gboolean changed = FALSE;
|
|
|
|
dir = g_dir_open (path, 0, NULL);
|
|
if (!dir)
|
|
return FALSE;
|
|
|
|
while ((dirent = g_dir_read_name (dir))) {
|
|
GStatBuf file_status;
|
|
|
|
filename = g_build_filename (path, dirent, NULL);
|
|
if (g_stat (filename, &file_status) < 0) {
|
|
/* Plugin will be removed from cache after the scan completes if it
|
|
* is still marked 'cached' */
|
|
g_free (filename);
|
|
continue;
|
|
}
|
|
|
|
if (file_status.st_mode & S_IFDIR) {
|
|
if (G_UNLIKELY (is_blacklisted_hidden_directory (dirent))) {
|
|
GST_TRACE_OBJECT (context->registry, "ignoring %s directory", dirent);
|
|
g_free (filename);
|
|
continue;
|
|
}
|
|
/* FIXME 2.0: Don't recurse into directories, this behaviour
|
|
* is inconsistent with other PATH environment variables
|
|
*/
|
|
if (level > 0) {
|
|
GST_LOG_OBJECT (context->registry, "recursing into directory %s",
|
|
filename);
|
|
changed |= gst_registry_scan_path_level (context, filename, level - 1);
|
|
} else {
|
|
GST_LOG_OBJECT (context->registry, "not recursing into directory %s, "
|
|
"recursion level too deep", filename);
|
|
}
|
|
g_free (filename);
|
|
continue;
|
|
}
|
|
if (!(file_status.st_mode & S_IFREG)) {
|
|
GST_TRACE_OBJECT (context->registry, "%s is not a regular file, ignoring",
|
|
filename);
|
|
g_free (filename);
|
|
continue;
|
|
}
|
|
if (!g_str_has_suffix (dirent, "." G_MODULE_SUFFIX)
|
|
#ifdef GST_EXTRA_MODULE_SUFFIX
|
|
&& !g_str_has_suffix (dirent, GST_EXTRA_MODULE_SUFFIX)
|
|
#endif
|
|
) {
|
|
GST_TRACE_OBJECT (context->registry,
|
|
"extension is not recognized as module file, ignoring file %s",
|
|
filename);
|
|
g_free (filename);
|
|
continue;
|
|
}
|
|
|
|
GST_LOG_OBJECT (context->registry, "file %s looks like a possible module",
|
|
filename);
|
|
|
|
/* try to avoid unnecessary plugin-move pain */
|
|
if (g_str_has_prefix (dirent, "libgstvalve") ||
|
|
g_str_has_prefix (dirent, "libgstselector")) {
|
|
GST_WARNING_OBJECT (context->registry, "ignoring old plugin %s which "
|
|
"has been merged into the corelements plugin", filename);
|
|
/* Plugin will be removed from cache after the scan completes if it
|
|
* is still marked 'cached' */
|
|
g_free (filename);
|
|
continue;
|
|
}
|
|
|
|
/* plug-ins are considered unique by basename; if the given name
|
|
* was already seen by the registry, we ignore it */
|
|
plugin = gst_registry_lookup_bn (context->registry, dirent);
|
|
if (plugin) {
|
|
gboolean env_vars_changed, deps_changed = FALSE;
|
|
|
|
if (plugin->registered) {
|
|
GST_DEBUG_OBJECT (context->registry,
|
|
"plugin already registered from path \"%s\"",
|
|
GST_STR_NULL (plugin->filename));
|
|
g_free (filename);
|
|
gst_object_unref (plugin);
|
|
continue;
|
|
}
|
|
|
|
env_vars_changed = _priv_plugin_deps_env_vars_changed (plugin);
|
|
|
|
/* If a file with a certain basename is seen on a different path,
|
|
* update the plugin to ensure the registry cache will reflect up
|
|
* to date information */
|
|
|
|
if (plugin->file_mtime == file_status.st_mtime &&
|
|
plugin->file_size == file_status.st_size && !env_vars_changed &&
|
|
!(deps_changed = _priv_plugin_deps_files_changed (plugin)) &&
|
|
!strcmp (plugin->filename, filename)) {
|
|
GST_LOG_OBJECT (context->registry, "file %s cached", filename);
|
|
GST_OBJECT_FLAG_UNSET (plugin, GST_PLUGIN_FLAG_CACHED);
|
|
GST_LOG_OBJECT (context->registry,
|
|
"marking plugin %p as registered as %s", plugin, filename);
|
|
plugin->registered = TRUE;
|
|
} else {
|
|
GST_INFO_OBJECT (context->registry, "cached info for %s is stale",
|
|
filename);
|
|
GST_DEBUG_OBJECT (context->registry, "mtime %" G_GINT64_FORMAT " != %"
|
|
G_GINT64_FORMAT " or size %" G_GINT64_FORMAT " != %"
|
|
G_GINT64_FORMAT " or external dependency env_vars changed: %d or"
|
|
" external dependencies changed: %d or old path %s != new path %s",
|
|
(gint64) plugin->file_mtime, (gint64) file_status.st_mtime,
|
|
(gint64) plugin->file_size, (gint64) file_status.st_size,
|
|
env_vars_changed, deps_changed, plugin->filename, filename);
|
|
gst_registry_remove_plugin (context->registry, plugin);
|
|
changed |= gst_registry_scan_plugin_file (context, filename,
|
|
file_status.st_size, file_status.st_mtime);
|
|
}
|
|
gst_object_unref (plugin);
|
|
|
|
} else {
|
|
GST_DEBUG_OBJECT (context->registry, "file %s not yet in registry",
|
|
filename);
|
|
changed |= gst_registry_scan_plugin_file (context, filename,
|
|
file_status.st_size, file_status.st_mtime);
|
|
}
|
|
|
|
g_free (filename);
|
|
}
|
|
|
|
g_dir_close (dir);
|
|
|
|
return changed;
|
|
}
|
|
|
|
static gboolean
|
|
gst_registry_scan_path_internal (GstRegistryScanContext * context,
|
|
const gchar * path)
|
|
{
|
|
gboolean changed;
|
|
|
|
GST_DEBUG_OBJECT (context->registry, "scanning path %s", path);
|
|
changed = gst_registry_scan_path_level (context, path, 10);
|
|
|
|
GST_DEBUG_OBJECT (context->registry, "registry changed in path %s: %d", path,
|
|
changed);
|
|
return changed;
|
|
}
|
|
|
|
/**
|
|
* gst_registry_scan_path:
|
|
* @registry: the registry to add found plugins to
|
|
* @path: (type filename): the path to scan
|
|
*
|
|
* Scan the given path for plugins to add to the registry. The syntax of the
|
|
* path is specific to the registry.
|
|
*
|
|
* Returns: %TRUE if registry changed
|
|
*/
|
|
gboolean
|
|
gst_registry_scan_path (GstRegistry * registry, const gchar * path)
|
|
{
|
|
GstRegistryScanContext context;
|
|
gboolean result;
|
|
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
|
|
g_return_val_if_fail (path != NULL, FALSE);
|
|
|
|
init_scan_context (&context, registry);
|
|
|
|
result = gst_registry_scan_path_internal (&context, path);
|
|
|
|
clear_scan_context (&context);
|
|
result |= context.changed;
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
_gst_plugin_feature_filter_plugin_name (GstPluginFeature * feature,
|
|
gpointer user_data)
|
|
{
|
|
return (strcmp (feature->plugin_name, (gchar *) user_data) == 0);
|
|
}
|
|
|
|
/**
|
|
* gst_registry_get_feature_list_by_plugin:
|
|
* @registry: a #GstRegistry.
|
|
* @name: a plugin name.
|
|
*
|
|
* Retrieves a #GList of features of the plugin with name @name.
|
|
*
|
|
* Returns: (transfer full) (element-type Gst.PluginFeature): a #GList of
|
|
* #GstPluginFeature. Use gst_plugin_feature_list_free() after usage.
|
|
*/
|
|
GList *
|
|
gst_registry_get_feature_list_by_plugin (GstRegistry * registry,
|
|
const gchar * name)
|
|
{
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
|
|
g_return_val_if_fail (name != NULL, NULL);
|
|
|
|
return gst_registry_feature_filter (registry,
|
|
_gst_plugin_feature_filter_plugin_name, FALSE, (gpointer) name);
|
|
}
|
|
|
|
/* Unref and delete the default registry */
|
|
void
|
|
_priv_gst_registry_cleanup (void)
|
|
{
|
|
GstRegistry *registry;
|
|
|
|
g_mutex_lock (&_gst_registry_mutex);
|
|
if ((registry = _gst_registry_default) != NULL) {
|
|
_gst_registry_default = NULL;
|
|
}
|
|
g_mutex_unlock (&_gst_registry_mutex);
|
|
|
|
/* unref outside of the lock because we can. */
|
|
if (registry)
|
|
gst_object_unref (registry);
|
|
}
|
|
|
|
/**
|
|
* gst_registry_check_feature_version:
|
|
* @registry: a #GstRegistry
|
|
* @feature_name: the name of the feature (e.g. "oggdemux")
|
|
* @min_major: the minimum major version number
|
|
* @min_minor: the minimum minor version number
|
|
* @min_micro: the minimum micro version number
|
|
*
|
|
* Checks whether a plugin feature by the given name exists in
|
|
* @registry and whether its version is at least the
|
|
* version required.
|
|
*
|
|
* Returns: %TRUE if the feature could be found and the version is
|
|
* the same as the required version or newer, and %FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_registry_check_feature_version (GstRegistry * registry,
|
|
const gchar * feature_name, guint min_major, guint min_minor,
|
|
guint min_micro)
|
|
{
|
|
GstPluginFeature *feature;
|
|
gboolean ret = FALSE;
|
|
|
|
g_return_val_if_fail (feature_name != NULL, FALSE);
|
|
|
|
GST_DEBUG ("Looking up plugin feature '%s'", feature_name);
|
|
|
|
feature = gst_registry_lookup_feature (registry, feature_name);
|
|
if (feature) {
|
|
ret = gst_plugin_feature_check_version (feature, min_major, min_minor,
|
|
min_micro);
|
|
gst_object_unref (feature);
|
|
} else {
|
|
GST_DEBUG ("Could not find plugin feature '%s'", feature_name);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
load_plugin_func (gpointer data, gpointer user_data)
|
|
{
|
|
GstPlugin *plugin;
|
|
const gchar *filename;
|
|
GError *err = NULL;
|
|
|
|
filename = (const gchar *) data;
|
|
GST_DEBUG ("Pre-loading plugin %s", filename);
|
|
|
|
plugin = gst_plugin_load_file (filename, &err);
|
|
|
|
if (plugin) {
|
|
GST_INFO ("Loaded plugin: \"%s\"", filename);
|
|
|
|
gst_registry_add_plugin (gst_registry_get (), 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_REGISTRY
|
|
/* Unref all plugins marked 'cached', to clear old plugins that no
|
|
* longer exist. Returns %TRUE if any plugins were removed */
|
|
static gboolean
|
|
gst_registry_remove_cache_plugins (GstRegistry * registry)
|
|
{
|
|
GList *g;
|
|
GList *g_next;
|
|
GstPlugin *plugin;
|
|
gboolean changed = FALSE;
|
|
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
|
|
|
|
GST_OBJECT_LOCK (registry);
|
|
|
|
GST_DEBUG_OBJECT (registry, "removing cached plugins");
|
|
g = registry->priv->plugins;
|
|
while (g) {
|
|
g_next = g->next;
|
|
plugin = g->data;
|
|
if (GST_OBJECT_FLAG_IS_SET (plugin, GST_PLUGIN_FLAG_CACHED)) {
|
|
GST_DEBUG_OBJECT (registry, "removing cached plugin \"%s\"",
|
|
GST_STR_NULL (plugin->filename));
|
|
registry->priv->plugins = g_list_delete_link (registry->priv->plugins, g);
|
|
--registry->priv->n_plugins;
|
|
if (G_LIKELY (plugin->basename))
|
|
g_hash_table_remove (registry->priv->basename_hash, plugin->basename);
|
|
gst_registry_remove_features_for_plugin_unlocked (registry, plugin);
|
|
gst_object_unref (plugin);
|
|
changed = TRUE;
|
|
}
|
|
g = g_next;
|
|
}
|
|
|
|
GST_OBJECT_UNLOCK (registry);
|
|
|
|
return changed;
|
|
}
|
|
|
|
typedef enum
|
|
{
|
|
REGISTRY_SCAN_AND_UPDATE_FAILURE = 0,
|
|
REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED,
|
|
REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED
|
|
} GstRegistryScanAndUpdateResult;
|
|
|
|
/*
|
|
* 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: %REGISTRY_SCAN_AND_UPDATE_FAILURE if the registry could not scanned
|
|
* or updated, %REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED if the
|
|
* registry is clean and %REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED if
|
|
* it has been updated and the cache needs to be re-read.
|
|
*/
|
|
static GstRegistryScanAndUpdateResult
|
|
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;
|
|
GstRegistryScanContext context;
|
|
|
|
GST_INFO ("Validating plugins from registry cache: %s", registry_file);
|
|
|
|
init_scan_context (&context, default_registry);
|
|
|
|
/* It sounds tempting to just compare the mtime of directories with the mtime
|
|
* of the registry cache, but it does not work. It would not catch updated
|
|
* plugins, which might bring more or less features.
|
|
*/
|
|
|
|
/* scan paths specified via --gst-plugin-path */
|
|
GST_DEBUG ("scanning paths added via --gst-plugin-path");
|
|
for (l = _priv_gst_plugin_paths; l != NULL; l = l->next) {
|
|
GST_INFO ("Scanning plugin path: \"%s\"", (gchar *) l->data);
|
|
changed |= gst_registry_scan_path_internal (&context, (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_1_0");
|
|
if (plugin_path == NULL)
|
|
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_internal (&context, 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_1_0");
|
|
if (plugin_path == NULL)
|
|
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_user_data_dir (),
|
|
"gstreamer-" GST_API_VERSION, "plugins", NULL);
|
|
|
|
GST_DEBUG ("scanning home plugins %s", home_plugins);
|
|
changed |= gst_registry_scan_path_internal (&context, home_plugins);
|
|
g_free (home_plugins);
|
|
|
|
/* add the main (installed) library path */
|
|
|
|
#ifdef G_OS_WIN32
|
|
{
|
|
char *base_dir;
|
|
char *dir;
|
|
|
|
base_dir =
|
|
g_win32_get_package_installation_directory_of_module
|
|
(_priv_gst_dll_handle);
|
|
|
|
dir = g_build_filename (base_dir, GST_PLUGIN_SUBDIR,
|
|
"gstreamer-" GST_API_VERSION, NULL);
|
|
GST_DEBUG ("scanning DLL dir %s", dir);
|
|
|
|
changed |= gst_registry_scan_path_internal (&context, dir);
|
|
|
|
g_free (dir);
|
|
g_free (base_dir);
|
|
}
|
|
#else
|
|
GST_DEBUG ("scanning main plugins %s", PLUGINDIR);
|
|
changed |= gst_registry_scan_path_internal (&context, PLUGINDIR);
|
|
#endif
|
|
} 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_internal (&context, list[i]);
|
|
}
|
|
g_strfreev (list);
|
|
}
|
|
|
|
clear_scan_context (&context);
|
|
changed |= context.changed;
|
|
|
|
/* Remove cached plugins so stale info is cleared. */
|
|
changed |= gst_registry_remove_cache_plugins (default_registry);
|
|
|
|
if (!changed) {
|
|
GST_INFO ("Registry cache has not changed");
|
|
return REGISTRY_SCAN_AND_UPDATE_SUCCESS_NOT_CHANGED;
|
|
}
|
|
|
|
if (!write_changes) {
|
|
GST_INFO ("Registry cache changed, but writing is disabled. Not writing.");
|
|
return REGISTRY_SCAN_AND_UPDATE_FAILURE;
|
|
}
|
|
|
|
GST_INFO ("Registry cache changed. Writing new registry cache");
|
|
if (!priv_gst_registry_binary_write_cache (default_registry,
|
|
default_registry->priv->plugins, registry_file)) {
|
|
g_set_error (error, GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
|
|
_("Error writing registry cache to %s: %s"),
|
|
registry_file, g_strerror (errno));
|
|
return REGISTRY_SCAN_AND_UPDATE_FAILURE;
|
|
}
|
|
|
|
GST_INFO ("Registry cache written successfully");
|
|
return REGISTRY_SCAN_AND_UPDATE_SUCCESS_UPDATED;
|
|
}
|
|
|
|
static gboolean
|
|
ensure_current_registry (GError ** error)
|
|
{
|
|
gchar *registry_file;
|
|
GstRegistry *default_registry;
|
|
gboolean ret = TRUE;
|
|
gboolean do_update = TRUE;
|
|
gboolean have_cache = TRUE;
|
|
|
|
default_registry = gst_registry_get ();
|
|
|
|
registry_file = g_strdup (g_getenv ("GST_REGISTRY_1_0"));
|
|
if (registry_file == NULL)
|
|
registry_file = g_strdup (g_getenv ("GST_REGISTRY"));
|
|
if (registry_file == NULL) {
|
|
registry_file = g_build_filename (g_get_user_cache_dir (),
|
|
"gstreamer-" GST_API_VERSION, "registry." TARGET_CPU ".bin", NULL);
|
|
}
|
|
|
|
if (!_gst_disable_registry_cache) {
|
|
GST_INFO ("reading registry cache: %s", registry_file);
|
|
have_cache = priv_gst_registry_binary_read_cache (default_registry,
|
|
registry_file);
|
|
/* Only ever read the registry cache once, then disable it for
|
|
* subsequent updates during the program lifetime */
|
|
_gst_disable_registry_cache = TRUE;
|
|
}
|
|
|
|
if (have_cache) {
|
|
do_update = !_priv_gst_disable_registry_update;
|
|
if (do_update) {
|
|
const gchar *update_env;
|
|
|
|
if ((update_env = g_getenv ("GST_REGISTRY_UPDATE"))) {
|
|
/* do update for any value different from "no" */
|
|
do_update = (strcmp (update_env, "no") != 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (do_update) {
|
|
const gchar *reuse_env;
|
|
|
|
if ((reuse_env = g_getenv ("GST_REGISTRY_REUSE_PLUGIN_SCANNER"))) {
|
|
/* do reuse for any value different from "no" */
|
|
__registry_reuse_plugin_scanner = (strcmp (reuse_env, "no") != 0);
|
|
}
|
|
/* now check registry */
|
|
GST_DEBUG ("Updating registry cache");
|
|
scan_and_update_registry (default_registry, registry_file, TRUE, error);
|
|
} else {
|
|
GST_DEBUG ("Not updating registry cache (disabled)");
|
|
}
|
|
|
|
g_free (registry_file);
|
|
GST_INFO ("registry reading and updating done, result = %d", ret);
|
|
|
|
return ret;
|
|
}
|
|
#endif /* GST_DISABLE_REGISTRY */
|
|
|
|
/**
|
|
* gst_registry_fork_is_enabled:
|
|
*
|
|
* By default GStreamer will perform scanning and rebuilding of the
|
|
* registry file using a helper child process.
|
|
*
|
|
* Applications might want to disable this behaviour with the
|
|
* gst_registry_fork_set_enabled() function, in which case new plugins
|
|
* are scanned (and loaded) into the application process.
|
|
*
|
|
* Returns: %TRUE if GStreamer will use the child helper process when
|
|
* rebuilding the registry.
|
|
*/
|
|
gboolean
|
|
gst_registry_fork_is_enabled (void)
|
|
{
|
|
return _gst_enable_registry_fork;
|
|
}
|
|
|
|
/**
|
|
* gst_registry_fork_set_enabled:
|
|
* @enabled: whether rebuilding the registry can use a temporary child helper process.
|
|
*
|
|
* Applications might want to disable/enable spawning of a child helper process
|
|
* when rebuilding the registry. See gst_registry_fork_is_enabled() for more
|
|
* information.
|
|
*/
|
|
void
|
|
gst_registry_fork_set_enabled (gboolean enabled)
|
|
{
|
|
_gst_enable_registry_fork = enabled;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
gboolean
|
|
gst_update_registry (void)
|
|
{
|
|
gboolean res;
|
|
|
|
#ifndef GST_DISABLE_REGISTRY
|
|
if (!_priv_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");
|
|
}
|
|
} else {
|
|
GST_INFO ("registry update disabled by environment");
|
|
res = TRUE;
|
|
}
|
|
|
|
#else
|
|
GST_WARNING ("registry update failed: %s", "registry disabled");
|
|
res = TRUE;
|
|
#endif /* GST_DISABLE_REGISTRY */
|
|
|
|
if (_priv_gst_preload_plugins) {
|
|
GST_DEBUG ("Preloading indicated plugins...");
|
|
g_slist_foreach (_priv_gst_preload_plugins, load_plugin_func, NULL);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* gst_registry_get_feature_list_cookie:
|
|
* @registry: the registry
|
|
*
|
|
* Returns the registry's feature list cookie. This changes
|
|
* every time a feature is added or removed from the registry.
|
|
*
|
|
* Returns: the feature list cookie.
|
|
*/
|
|
guint32
|
|
gst_registry_get_feature_list_cookie (GstRegistry * registry)
|
|
{
|
|
g_return_val_if_fail (GST_IS_REGISTRY (registry), 0);
|
|
|
|
return registry->priv->cookie;
|
|
}
|