gstreamer/gst/gstregistry.c

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstregistry.c: handle registry
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <glib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "gstinfo.h"
#include "gstregistry.h"
#define CLASS(registry) GST_REGISTRY_CLASS (G_OBJECT_GET_CLASS (registry))
/* Element signals and args */
enum {
PLUGIN_ADDED,
LAST_SIGNAL
};
static GList *_gst_registry_pool = NULL;
static GList *_gst_registry_pool_plugins = NULL;
static void gst_registry_class_init (GstRegistryClass *klass);
static void gst_registry_init (GstRegistry *registry);
static GObjectClass *parent_class = NULL;
static guint gst_registry_signals[LAST_SIGNAL] = { 0 };
GType
gst_registry_get_type (void)
{
static GType registry_type = 0;
if (!registry_type) {
static const GTypeInfo registry_info = {
sizeof (GstRegistryClass),
NULL,
NULL,
(GClassInitFunc) gst_registry_class_init,
NULL,
NULL,
sizeof (GstRegistry),
32,
(GInstanceInitFunc) gst_registry_init,
NULL
};
registry_type = g_type_register_static (G_TYPE_OBJECT, "GstRegistry",
&registry_info, G_TYPE_FLAG_ABSTRACT);
}
return registry_type;
}
static void
gst_registry_class_init (GstRegistryClass *klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass*) klass;
parent_class = g_type_class_ref (G_TYPE_OBJECT);
gst_registry_signals[PLUGIN_ADDED] =
g_signal_new ("plugin_added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstRegistryClass, plugin_added), NULL, NULL,
gst_marshal_VOID__POINTER, G_TYPE_NONE, 1,
G_TYPE_POINTER);
gobject_class->dispose = NULL;
}
static void
gst_registry_init (GstRegistry *registry)
{
registry->priority = 0;
registry->loaded = FALSE;
registry->paths = NULL;
}
/**
* gst_registry_load:
* @registry: the registry to load
*
* Load the given registry
*
* Returns: TRUE on success.
*/
gboolean
gst_registry_load (GstRegistry *registry)
{
g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
if (CLASS (registry)->load)
return CLASS (registry)->load (registry);
return FALSE;
}
/**
* gst_registry_is_loaded:
* @registry: the registry to check
*
* Check if the given registry is loaded
*
* Returns: TRUE if loaded.
*/
gboolean
gst_registry_is_loaded (GstRegistry *registry)
{
g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
return registry->loaded;
}
/**
* gst_registry_save:
* @registry: the registry to save
*
* Save the contents of the given registry
*
* Returns: TRUE on success
*/
gboolean
gst_registry_save (GstRegistry *registry)
{
g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
if (CLASS (registry)->save)
return CLASS (registry)->save (registry);
return FALSE;
}
/**
* gst_registry_rebuild:
* @registry: the registry to rebuild
*
* Rebuild the given registry
*
* Returns: TRUE on success
*/
gboolean
gst_registry_rebuild (GstRegistry *registry)
{
g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
if (CLASS (registry)->rebuild)
return CLASS (registry)->rebuild (registry);
return FALSE;
}
/**
* gst_registry_unload:
* @registry: the registry to unload
*
* Unload the given registry
*
* Returns: TRUE on success
*/
gboolean
gst_registry_unload (GstRegistry *registry)
{
g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
if (CLASS (registry)->unload)
return CLASS (registry)->unload (registry);
return FALSE;
}
/**
* gst_registry_add_path:
* @registry: the registry to add the path to
*
* Add the given path to the registry. The syntax of the
* path is specific to the registry. If the path has already been
* added, do nothing.
*/
void
gst_registry_add_path (GstRegistry *registry, const gchar *path)
{
GList *l;
g_return_if_fail (GST_IS_REGISTRY (registry));
g_return_if_fail (path != NULL);
l = registry->paths;
while (l) {
if (strcmp (l->data, path) == 0)
return;
l = g_list_next (l);
}
registry->paths = g_list_append (registry->paths, g_strdup (path));
}
/**
* gst_registry_get_path_list:
* @registry: the registry to get the pathlist of
*
* Get the list of paths for the given registry.
*
* Returns: A Glist of paths as strings. g_list_free after use.
*/
GList*
gst_registry_get_path_list (GstRegistry *registry)
{
g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
return g_list_copy (registry->paths);
}
static void
free_list_strings_func (gpointer data, gpointer user_data)
{
g_free (data);
}
/**
* gst_registry_clear_paths:
* @registry: the registry to clear the paths of
*
* Clear the paths of the given registry
*/
void
gst_registry_clear_paths (GstRegistry *registry)
{
g_return_if_fail (GST_IS_REGISTRY (registry));
g_list_foreach (registry->paths, free_list_strings_func, NULL);
g_list_free (registry->paths);
registry->paths = NULL;
}
/**
* gst_registry_add_plugin:
* @registry: the registry to add the plugin to
* @plugin: the plugin to add
*
* Add the plugin to the registry. The plugin-added signal
* will be emitted.
*
* Returns: TRUE on success.
*/
gboolean
gst_registry_add_plugin (GstRegistry *registry, GstPlugin *plugin)
{
g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
plugin->manager = registry;
registry->plugins = g_list_prepend (registry->plugins, plugin);
g_signal_emit (G_OBJECT (registry), gst_registry_signals[PLUGIN_ADDED], 0, plugin);
return TRUE;
}
/**
* gst_registry_remove_plugin:
* @registry: the registry to remove the plugin from
* @plugin: the plugin to remove
*
* Remove the plugin from the registry.
*/
void
gst_registry_remove_plugin (GstRegistry *registry, GstPlugin *plugin)
{
g_return_if_fail (GST_IS_REGISTRY (registry));
registry->plugins = g_list_remove (registry->plugins, plugin);
}
static GstPluginFeature*
gst_plugin_list_find_feature (GList *plugins, const gchar *name, GType type)
{
GstPluginFeature *feature = NULL;
while (plugins) {
GstPlugin *plugin = (GstPlugin *) (plugins->data);
feature = gst_plugin_find_feature (plugin, name, type);
if (feature)
return feature;
plugins = g_list_next (plugins);
}
return feature;
}
static GstPlugin*
gst_plugin_list_find_plugin (GList *plugins, const gchar *name)
{
while (plugins) {
GstPlugin *plugin = (GstPlugin *) (plugins->data);
if (plugin->name && !strcmp (plugin->name, name))
return plugin;
plugins = g_list_next (plugins);
}
return NULL;
}
/**
* 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.
*
* Returns: The plugin with the given name or NULL if the plugin was not found.
*/
GstPlugin*
gst_registry_find_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_plugin_list_find_plugin (registry->plugins, name);
}
/**
* 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: The pluginfeature with the given name and type or NULL
* if the plugin was not found.
*/
GstPluginFeature*
gst_registry_find_feature (GstRegistry *registry, const gchar *name, GType type)
{
g_return_val_if_fail (GST_IS_REGISTRY (registry), NULL);
g_return_val_if_fail (name != NULL, NULL);
return gst_plugin_list_find_feature (registry->plugins, name, type);
}
/**
* gst_registry_load_plugin:
* @registry: the registry to load the plugin from
* @plugin: the plugin to load
*
* Bring the plugin from the registry into memory.
*
* Returns: a value indicating the result
*/
GstRegistryReturn
gst_registry_load_plugin (GstRegistry *registry, GstPlugin *plugin)
{
g_return_val_if_fail (GST_IS_REGISTRY (registry), GST_REGISTRY_PLUGIN_LOAD_ERROR);
if (CLASS (registry)->load_plugin)
return CLASS (registry)->load_plugin (registry, plugin);
return GST_REGISTRY_PLUGIN_LOAD_ERROR;
}
/**
* gst_registry_unload_plugin:
* @registry: the registry to unload the plugin from
* @plugin: the plugin to unload
*
* Unload the plugin from the given registry.
*
* Returns: a value indicating the result
*/
GstRegistryReturn
gst_registry_unload_plugin (GstRegistry *registry, GstPlugin *plugin)
{
g_return_val_if_fail (GST_IS_REGISTRY (registry), GST_REGISTRY_PLUGIN_LOAD_ERROR);
if (CLASS (registry)->unload_plugin)
return CLASS (registry)->unload_plugin (registry, plugin);
return GST_REGISTRY_PLUGIN_LOAD_ERROR;
}
/**
* gst_registry_update_plugin:
* @registry: the registry to update
* @plugin: the plugin to update
*
* Update the plugin in the given registry.
*
* Returns: a value indicating the result
*/
GstRegistryReturn
gst_registry_update_plugin (GstRegistry *registry, GstPlugin *plugin)
{
g_return_val_if_fail (GST_IS_REGISTRY (registry), GST_REGISTRY_PLUGIN_LOAD_ERROR);
if (CLASS (registry)->update_plugin)
return CLASS (registry)->update_plugin (registry, plugin);
return GST_REGISTRY_PLUGIN_LOAD_ERROR;
}
/**
* gst_registry_pool_list:
*
* Get a list of all registries in the pool
*
* Returns: a Glist of GstRegistries, g_list_free after use.
*/
GList*
gst_registry_pool_list (void)
{
return g_list_copy (_gst_registry_pool);
}
static gint
gst_registry_compare_func (gconstpointer a, gconstpointer b)
{
return GST_REGISTRY (a)->priority - GST_REGISTRY (b)->priority;
}
/**
* gst_registry_pool_add:
* @registry: the registry to add
* @priority: the priority of the registry
*
* Add the registry to the pool with the given priority.
*/
void
gst_registry_pool_add (GstRegistry *registry, guint priority)
{
g_return_if_fail (GST_IS_REGISTRY (registry));
registry->priority = priority;
_gst_registry_pool = g_list_insert_sorted (_gst_registry_pool, registry, gst_registry_compare_func);
}
/**
* gst_registry_pool_remove:
* @registry: the registry to remove
*
* Remove the registry from the pool.
*/
void
gst_registry_pool_remove (GstRegistry *registry)
{
g_return_if_fail (GST_IS_REGISTRY (registry));
_gst_registry_pool = g_list_remove (_gst_registry_pool, registry);
}
/**
* gst_registry_pool_add_plugin:
* @plugin: the plugin to add
*
* Add the plugin to the global pool of plugins.
*/
void
gst_registry_pool_add_plugin (GstPlugin *plugin)
{
_gst_registry_pool_plugins = g_list_prepend (_gst_registry_pool_plugins, plugin);
}
/**
* gst_registry_pool_load_all:
*
* Load all the registries in the pool. Registries with the
* GST_REGISTRY_DELAYED_LOADING will not be loaded.
*/
void
gst_registry_pool_load_all (void)
{
GList *walk = _gst_registry_pool;
while (walk) {
GstRegistry *registry = GST_REGISTRY (walk->data);
if (registry->flags & GST_REGISTRY_READABLE &&
!(registry->flags & GST_REGISTRY_DELAYED_LOADING)) {
gst_registry_load (registry);
}
walk = g_list_next (walk);
}
}
/**
* gst_registry_pool_plugin_list:
*
* Get a list of all plugins in the pool.
*
* Returns: a GList of plugins, g_list_free after use.
*/
GList*
gst_registry_pool_plugin_list (void)
{
GList *result = NULL;
GList *walk = _gst_registry_pool;
while (walk) {
GstRegistry *registry = GST_REGISTRY (walk->data);
/* FIXME only include highest priority plugins */
result = g_list_concat (result, g_list_copy (registry->plugins));
walk = g_list_next (walk);
}
return result;
}
/**
* gst_registry_pool_feature_list:
* @type: the type of the features to list.
*
* Get a list of all pluginfeatures of the given type in the pool.
*
* Returns: a GList of pluginfeatures, g_list_free after use.
*/
GList*
gst_registry_pool_feature_list (GType type)
{
GList *result = NULL;
GList *plugins = gst_registry_pool_plugin_list ();
while (plugins) {
GstPlugin *plugin = GST_PLUGIN (plugins->data);
GList *features = plugin->features;
while (features) {
GstPluginFeature *feature = GST_PLUGIN_FEATURE (features->data);
if (type == 0 || G_OBJECT_TYPE (feature) == type) {
result = g_list_prepend (result, feature);
}
features = g_list_next (features);
}
plugins = g_list_next (plugins);
}
result = g_list_reverse (result);
return result;
}
/**
* gst_registry_pool_find_plugin:
* @name: the name of the plugin to find
*
* Get the named plugin from the registry pool
*
* Returns: The plugin with the given name or NULL if the plugin
* was not found.
*/
GstPlugin*
gst_registry_pool_find_plugin (const gchar *name)
{
GstPlugin *result = NULL;
GList *walk;
result = gst_plugin_list_find_plugin (_gst_registry_pool_plugins, name);
if (result)
return result;
walk = _gst_registry_pool;
while (walk) {
GstRegistry *registry = GST_REGISTRY (walk->data);
/* FIXME only include highest priority plugins */
result = gst_registry_find_plugin (registry, name);
if (result)
return result;
walk = g_list_next (walk);
}
return NULL;
}
/**
* gst_registry_pool_find_feature:
* @name: the name of the pluginfeature to find
* @type: the type of the pluginfeature to find
*
* Get the pluginfeature with the given name and type from the pool of
* registries.
*
* Returns: A pluginfeature with the given name and type or NULL if the feature
* was not found.
*/
GstPluginFeature*
gst_registry_pool_find_feature (const gchar *name, GType type)
{
GstPluginFeature *result = NULL;
GList *walk;
result = gst_plugin_list_find_feature (_gst_registry_pool_plugins, name, type);
if (result)
return result;
walk = _gst_registry_pool;
while (walk) {
GstRegistry *registry = GST_REGISTRY (walk->data);
/* FIXME only include highest priority plugins */
result = gst_registry_find_feature (registry, name, type);
if (result)
return result;
walk = g_list_next (walk);
}
return NULL;
}
/**
* gst_registry_pool_get_prefered:
* @flags: The flags for the prefered registry
*
* Get the prefered registry with the given flags
*
* Returns: The registry with the flags.
*/
GstRegistry*
gst_registry_pool_get_prefered (GstRegistryFlags flags)
{
GList *walk = _gst_registry_pool;
while (walk) {
GstRegistry *registry = GST_REGISTRY (walk->data);
if (registry->flags & flags)
return registry;
walk = g_list_next (walk);
}
return NULL;
}
static gchar *gst_registry_option = NULL;
/* save the registry specified as an option */
void
gst_registry_option_set (const gchar *registry)
{
gst_registry_option = g_strdup (registry);
return;
}
/* decide if we're going to use the global registry or not
* - if root, use global
* - if not root :
* - if user can write to global, use global
* - else use local
*/
gboolean
gst_registry_use_global (void)
{
/* struct stat reg_stat; */
FILE *reg;
if (getuid () == 0) return TRUE; /* root always uses global */
/* check if we can write to the global registry somehow */
reg = fopen (GLOBAL_REGISTRY_FILE, "a");
if (reg == NULL) { return FALSE; }
else
{
/* we can write to it, do so for kicks */
fclose (reg);
}
/* we can write to it, so now see if we can write in the dir as well */
if (access (GLOBAL_REGISTRY_DIR, W_OK) == 0) return TRUE;
return FALSE;
}
/* get the data that tells us where we can write the registry
* Allocate, fill in the GstRegistryWrite struct according to
* current situation, and return it */
GstRegistryWrite *
gst_registry_write_get ()
{
GstRegistryWrite *gst_reg = g_malloc (sizeof (GstRegistryWrite));
/* if a registry is specified on command line, use that one */
if (gst_registry_option)
{
/* FIXME: maybe parse the dir from file ? */
gst_reg->dir = NULL;
gst_reg->file = gst_registry_option;
/* we cannot use the temp dir since the move needs to be on same device */
gst_reg->tmp_file = g_strdup_printf ("%s.tmp", gst_registry_option);
}
else if (g_getenv ("GST_REGISTRY"))
{
gst_reg->dir = NULL;
gst_reg->file = g_strdup (g_getenv ("GST_REGISTRY"));
gst_reg->tmp_file = g_strdup_printf ("%s.tmp", g_getenv ("GST_REGISTRY"));
}
else
{
if (gst_registry_use_global ())
{
gst_reg->dir = g_strdup (GLOBAL_REGISTRY_DIR);
gst_reg->file = g_strdup (GLOBAL_REGISTRY_FILE);
gst_reg->tmp_file = g_strdup (GLOBAL_REGISTRY_FILE_TMP);
}
else
{
gchar *homedir = (gchar *) g_get_home_dir ();
gst_reg->dir = g_strjoin ("/", homedir, LOCAL_REGISTRY_DIR, NULL);
gst_reg->file = g_strjoin ("/", homedir, LOCAL_REGISTRY_FILE, NULL);
gst_reg->tmp_file = g_strjoin ("/", homedir, LOCAL_REGISTRY_FILE_TMP, NULL);
}
}
return gst_reg;
}
/* fill in the GstRegistryRead struct according to current situation */
GstRegistryRead *
gst_registry_read_get ()
{
GstRegistryRead *gst_reg = g_new0 (GstRegistryRead, 1);
/* if a registry is specified on command line, use that one */
if (gst_registry_option)
{
/* FIXME: maybe parse the dir from file ? */
gst_reg->local_reg = NULL;
gst_reg->global_reg = gst_registry_option;
}
else if (g_getenv ("GST_REGISTRY"))
{
gst_reg->local_reg = NULL;
gst_reg->global_reg = g_strdup (g_getenv ("GST_REGISTRY"));
}
else
{
gchar *homedir = (gchar *) g_get_home_dir ();
gst_reg->local_reg = g_strjoin ("/", homedir, LOCAL_REGISTRY_FILE, NULL);
if (g_file_test (gst_reg->local_reg, G_FILE_TEST_EXISTS) == FALSE)
{
/* it does not exist, so don't read from it */
g_free (gst_reg->local_reg);
gst_reg->local_reg = NULL;
}
gst_reg->global_reg = g_strdup (GLOBAL_REGISTRY_FILE);
}
return gst_reg;
}