EXPORT_C
#endif
GstPluginFeature *
gst_plugin_feature_load (GstPluginFeature * feature)
{
GstPlugin *plugin;
GstPluginFeature *real_feature;
g_return_val_if_fail (feature != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLUGIN_FEATURE (feature), FALSE);
GST_DEBUG ("loading plugin for feature %p; '%s'", feature,
GST_PLUGIN_FEATURE_NAME (feature));
if (feature->loaded)
return gst_object_ref (feature);
GST_DEBUG ("loading plugin %s", feature->plugin_name);
plugin = gst_plugin_load_by_name (feature->plugin_name);
if (!plugin)
goto load_failed;
GST_DEBUG ("loaded plugin %s", feature->plugin_name);
gst_object_unref (plugin);
real_feature =
gst_registry_lookup_feature (gst_registry_get_default (), feature->name);
if (real_feature == NULL)
goto disappeared;
else if (!real_feature->loaded)
goto not_found;
return real_feature;
/* ERRORS */
load_failed:
{
GST_WARNING ("Failed to load plugin containing feature '%s'.",
GST_PLUGIN_FEATURE_NAME (feature));
return NULL;
}
disappeared:
{
GST_INFO
("Loaded plugin containing feature '%s', but feature disappeared.",
feature->name);
return NULL;
}
not_found:
{
GST_INFO ("Tried to load plugin containing feature '%s', but feature was "
"not found.", real_feature->name);
return NULL;
}
}
gboolean
gst_tracer_register (GstPlugin * plugin, const gchar * name, GType type)
{
GstPluginFeature *existing_feature;
GstRegistry *registry;
GstTracerFactory *factory;
g_return_val_if_fail (name != NULL, FALSE);
g_return_val_if_fail (g_type_is_a (type, GST_TYPE_TRACER), FALSE);
registry = gst_registry_get ();
/* check if feature already exists, if it exists there is no need to update it
* when the registry is getting updated, outdated plugins and all their
* features are removed and readded.
*/
existing_feature = gst_registry_lookup_feature (registry, name);
if (existing_feature) {
GST_DEBUG_OBJECT (registry, "update existing feature %p (%s)",
existing_feature, name);
factory = GST_TRACER_FACTORY_CAST (existing_feature);
factory->type = type;
existing_feature->loaded = TRUE;
gst_object_unref (existing_feature);
return TRUE;
}
factory = g_object_newv (GST_TYPE_TRACER_FACTORY, 0, NULL);
GST_DEBUG_OBJECT (factory, "new tracer factory for %s", name);
gst_plugin_feature_set_name (GST_PLUGIN_FEATURE_CAST (factory), name);
gst_plugin_feature_set_rank (GST_PLUGIN_FEATURE_CAST (factory),
GST_RANK_NONE);
factory->type = type;
GST_DEBUG_OBJECT (factory, "tracer factory for %u:%s",
(guint) type, g_type_name (type));
if (plugin && plugin->desc.name) {
GST_PLUGIN_FEATURE_CAST (factory)->plugin_name = plugin->desc.name; /* interned string */
GST_PLUGIN_FEATURE_CAST (factory)->plugin = plugin;
g_object_add_weak_pointer ((GObject *) plugin,
(gpointer *) & GST_PLUGIN_FEATURE_CAST (factory)->plugin);
} else {
GST_PLUGIN_FEATURE_CAST (factory)->plugin_name = "NULL";
GST_PLUGIN_FEATURE_CAST (factory)->plugin = NULL;
}
GST_PLUGIN_FEATURE_CAST (factory)->loaded = TRUE;
gst_registry_add_feature (gst_registry_get (),
GST_PLUGIN_FEATURE_CAST (factory));
return TRUE;
}
void
check_remove_gst_feature (gchar * feature_name)
{
GstRegistry *registry = gst_registry_get ();
GstPluginFeature *feature;
if ((feature = gst_registry_lookup_feature (registry, feature_name))) {
gst_registry_remove_feature (registry, feature);
gst_object_unref (feature);
} else {
GST_WARNING ("feature not found");
}
}
/* Initialize the tracing system */
void
_priv_gst_tracing_init (void)
{
const gchar *env = g_getenv ("GST_TRACER_PLUGINS");
if (env != NULL && *env != '\0') {
GstRegistry *registry = gst_registry_get ();
GstPluginFeature *feature;
GstTracerFactory *factory;
gchar **t = g_strsplit_set (env, ";", 0);
gint i = 0;
gchar *params;
GST_INFO ("enabling tracers: '%s'", env);
if (G_N_ELEMENTS (_quark_strings) != GST_TRACER_QUARK_MAX)
g_warning ("the quark table is not consistent! %d != %d",
(gint) G_N_ELEMENTS (_quark_strings), GST_TRACER_QUARK_MAX);
for (i = 0; i < GST_TRACER_QUARK_MAX; i++) {
_priv_gst_tracer_quark_table[i] =
g_quark_from_static_string (_quark_strings[i]);
}
_priv_tracers = g_hash_table_new (NULL, NULL);
i = 0;
while (t[i]) {
// check t[i] for params
if ((params = strchr (t[i], '('))) {
gchar *end = strchr (¶ms[1], ')');
*params = '\0';
params++;
if (end)
*end = '\0';
} else {
params = NULL;
}
GST_INFO ("checking tracer: '%s'", t[i]);
if ((feature = gst_registry_lookup_feature (registry, t[i]))) {
factory = GST_TRACER_FACTORY (gst_plugin_feature_load (feature));
if (factory) {
GST_INFO_OBJECT (factory, "creating tracer: type-id=%u",
(guint) factory->type);
/* tracers register them self to the hooks */
gst_object_unref (g_object_new (factory->type, "params", params,
NULL));
} else {
GST_WARNING_OBJECT (feature,
"loading plugin containing feature %s failed!", t[i]);
}
} else {
GST_WARNING ("no tracer named '%s'", t[i]);
}
i++;
}
g_strfreev (t);
}
}
/**
* gst_element_register:
* @plugin: (allow-none): #GstPlugin to register the element with, or NULL for
* a static element (note that passing NULL only works in GStreamer 0.10.13
* and later)
* @name: name of elements of this type
* @rank: rank of element (higher rank means more importance when autoplugging)
* @type: GType of element to register
*
* Create a new elementfactory capable of instantiating objects of the
* @type and add the factory to @plugin.
*
* Returns: TRUE, if the registering succeeded, FALSE on error
*/
gboolean
gst_element_register (GstPlugin * plugin, const gchar * name, guint rank,
GType type)
{
GstPluginFeature *existing_feature;
GstRegistry *registry;
GstElementFactory *factory;
GType *interfaces;
guint n_interfaces, i;
GstElementClass *klass;
GList *item;
g_return_val_if_fail (name != NULL, FALSE);
g_return_val_if_fail (g_type_is_a (type, GST_TYPE_ELEMENT), FALSE);
registry = gst_registry_get_default ();
/* check if feature already exists, if it exists there is no need to update it
* when the registry is getting updated, outdated plugins and all their
* features are removed and readded.
*/
existing_feature = gst_registry_lookup_feature (registry, name);
if (existing_feature) {
GST_DEBUG_OBJECT (registry, "update existing feature %p (%s)",
existing_feature, name);
factory = GST_ELEMENT_FACTORY_CAST (existing_feature);
factory->type = type;
existing_feature->loaded = TRUE;
g_type_set_qdata (type, _gst_elementclass_factory, factory);
gst_object_unref (existing_feature);
return TRUE;
}
factory =
GST_ELEMENT_FACTORY_CAST (g_object_newv (GST_TYPE_ELEMENT_FACTORY, 0,
NULL));
gst_plugin_feature_set_name (GST_PLUGIN_FEATURE_CAST (factory), name);
GST_LOG_OBJECT (factory, "Created new elementfactory for type %s",
g_type_name (type));
/* provide info needed during class structure setup */
g_type_set_qdata (type, _gst_elementclass_factory, factory);
klass = GST_ELEMENT_CLASS (g_type_class_ref (type));
if ((klass->details.longname == NULL) ||
(klass->details.klass == NULL) || (klass->details.author == NULL))
goto detailserror;
factory->type = type;
__gst_element_details_copy (&factory->details, &klass->details);
if (klass->meta_data) {
factory->meta_data = gst_structure_copy ((GstStructure *) klass->meta_data);
} else {
factory->meta_data = NULL;
}
for (item = klass->padtemplates; item; item = item->next) {
GstPadTemplate *templ = item->data;
GstStaticPadTemplate *newt;
gchar *caps_string = gst_caps_to_string (templ->caps);
newt = g_slice_new (GstStaticPadTemplate);
newt->name_template = g_intern_string (templ->name_template);
newt->direction = templ->direction;
newt->presence = templ->presence;
newt->static_caps.caps.refcount = 0;
newt->static_caps.string = g_intern_string (caps_string);
factory->staticpadtemplates =
g_list_append (factory->staticpadtemplates, newt);
g_free (caps_string);
}
factory->numpadtemplates = klass->numpadtemplates;
/* special stuff for URI handling */
if (g_type_is_a (type, GST_TYPE_URI_HANDLER)) {
GstURIHandlerInterface *iface = (GstURIHandlerInterface *)
g_type_interface_peek (klass, GST_TYPE_URI_HANDLER);
if (!iface || (!iface->get_type && !iface->get_type_full) ||
(!iface->get_protocols && !iface->get_protocols_full))
goto urierror;
if (iface->get_type)
factory->uri_type = iface->get_type ();
else if (iface->get_type_full)
factory->uri_type = iface->get_type_full (factory->type);
if (!GST_URI_TYPE_IS_VALID (factory->uri_type))
goto urierror;
if (iface->get_protocols)
factory->uri_protocols = g_strdupv (iface->get_protocols ());
else if (iface->get_protocols_full)
factory->uri_protocols = iface->get_protocols_full (factory->type);
if (!factory->uri_protocols)
goto urierror;
}
interfaces = g_type_interfaces (type, &n_interfaces);
for (i = 0; i < n_interfaces; i++) {
__gst_element_factory_add_interface (factory, g_type_name (interfaces[i]));
}
g_free (interfaces);
if (plugin && plugin->desc.name) {
GST_PLUGIN_FEATURE_CAST (factory)->plugin_name = plugin->desc.name;
GST_PLUGIN_FEATURE_CAST (factory)->plugin = plugin;
g_object_add_weak_pointer ((GObject *) plugin,
(gpointer *) & GST_PLUGIN_FEATURE_CAST (factory)->plugin);
} else {
GST_PLUGIN_FEATURE_CAST (factory)->plugin_name = "NULL";
GST_PLUGIN_FEATURE_CAST (factory)->plugin = NULL;
}
gst_plugin_feature_set_rank (GST_PLUGIN_FEATURE_CAST (factory), rank);
GST_PLUGIN_FEATURE_CAST (factory)->loaded = TRUE;
gst_registry_add_feature (registry, GST_PLUGIN_FEATURE_CAST (factory));
return TRUE;
/* ERRORS */
urierror:
{
GST_WARNING_OBJECT (factory, "error with uri handler!");
gst_element_factory_cleanup (factory);
return FALSE;
}
detailserror:
{
GST_WARNING_OBJECT (factory,
"The GstElementDetails don't seem to have been set properly");
gst_element_factory_cleanup (factory);
return FALSE;
}
}
int
main (int argc, char *argv[])
{
gboolean print_all = FALSE;
gboolean do_print_blacklist = FALSE;
gboolean plugin_name = FALSE;
gboolean print_aii = FALSE;
gboolean uri_handlers = FALSE;
gboolean check_exists = FALSE;
gchar *min_version = NULL;
guint minver_maj = GST_VERSION_MAJOR;
guint minver_min = GST_VERSION_MINOR;
guint minver_micro = 0;
#ifndef GST_DISABLE_OPTION_PARSING
GOptionEntry options[] = {
{"print-all", 'a', 0, G_OPTION_ARG_NONE, &print_all,
N_("Print all elements"), NULL},
{"print-blacklist", 'b', 0, G_OPTION_ARG_NONE, &do_print_blacklist,
N_("Print list of blacklisted files"), NULL},
{"print-plugin-auto-install-info", '\0', 0, G_OPTION_ARG_NONE, &print_aii,
N_("Print a machine-parsable list of features the specified plugin "
"or all plugins provide.\n "
"Useful in connection with external automatic plugin "
"installation mechanisms"), NULL},
{"plugin", '\0', 0, G_OPTION_ARG_NONE, &plugin_name,
N_("List the plugin contents"), NULL},
{"exists", '\0', 0, G_OPTION_ARG_NONE, &check_exists,
N_("Check if the specified element or plugin exists"), NULL},
{"atleast-version", '\0', 0, G_OPTION_ARG_STRING, &min_version,
N_
("When checking if an element or plugin exists, also check that its "
"version is at least the version specified"), NULL},
{"uri-handlers", 'u', 0, G_OPTION_ARG_NONE, &uri_handlers,
N_
("Print supported URI schemes, with the elements that implement them"),
NULL},
GST_TOOLS_GOPTION_VERSION,
{NULL}
};
GOptionContext *ctx;
GError *err = NULL;
#endif
setlocale (LC_ALL, "");
#ifdef ENABLE_NLS
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
textdomain (GETTEXT_PACKAGE);
#endif
/* avoid glib warnings when inspecting deprecated properties */
g_setenv ("G_ENABLE_DIAGNOSTIC", "0", FALSE);
g_set_prgname ("gst-inspect-" GST_API_VERSION);
#ifndef GST_DISABLE_OPTION_PARSING
ctx = g_option_context_new ("[ELEMENT-NAME | PLUGIN-NAME]");
g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
g_option_context_add_group (ctx, gst_init_get_option_group ());
if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
g_printerr ("Error initializing: %s\n", err->message);
g_clear_error (&err);
g_option_context_free (ctx);
return -1;
}
g_option_context_free (ctx);
#else
gst_init (&argc, &argv);
#endif
gst_tools_print_version ();
if (print_all && argc > 1) {
g_printerr ("-a requires no extra arguments\n");
return -1;
}
if (uri_handlers && argc > 1) {
g_printerr ("-u requires no extra arguments\n");
return -1;
}
/* --atleast-version implies --exists */
if (min_version != NULL) {
if (sscanf (min_version, "%u.%u.%u", &minver_maj, &minver_min,
&minver_micro) < 2) {
g_printerr ("Can't parse version '%s' passed to --atleast-version\n",
min_version);
return -1;
}
check_exists = TRUE;
}
if (check_exists) {
int exit_code;
if (argc == 1) {
g_printerr ("--exists requires an extra command line argument\n");
exit_code = -1;
} else {
if (!plugin_name) {
GstPluginFeature *feature;
feature = gst_registry_lookup_feature (gst_registry_get (), argv[1]);
if (feature != NULL && gst_plugin_feature_check_version (feature,
minver_maj, minver_min, minver_micro)) {
exit_code = 0;
} else {
exit_code = 1;
}
} else {
/* FIXME: support checking for plugins too */
g_printerr ("Checking for plugins is not supported yet\n");
exit_code = -1;
}
}
return exit_code;
}
/* if no arguments, print out list of elements */
if (uri_handlers) {
print_all_uri_handlers ();
} else if (argc == 1 || print_all) {
if (do_print_blacklist)
print_blacklist ();
else {
if (print_aii)
print_all_plugin_automatic_install_info ();
else
print_element_list (print_all);
}
} else {
/* else we try to get a factory */
GstElementFactory *factory;
GstPlugin *plugin;
const char *arg = argv[argc - 1];
int retval;
if (!plugin_name) {
factory = gst_element_factory_find (arg);
/* if there's a factory, print out the info */
if (factory) {
retval = print_element_info (factory, print_all);
gst_object_unref (factory);
} else {
retval = print_element_features (arg);
}
} else {
retval = -1;
}
/* otherwise check if it's a plugin */
if (retval) {
plugin = gst_registry_find_plugin (gst_registry_get (), arg);
/* if there is such a plugin, print out info */
if (plugin) {
if (print_aii) {
print_plugin_automatic_install_info (plugin);
} else {
print_plugin_info (plugin);
print_plugin_features (plugin);
}
} else {
GError *error = NULL;
if (g_file_test (arg, G_FILE_TEST_EXISTS)) {
plugin = gst_plugin_load_file (arg, &error);
if (plugin) {
if (print_aii) {
print_plugin_automatic_install_info (plugin);
} else {
print_plugin_info (plugin);
print_plugin_features (plugin);
}
} else {
g_printerr (_("Could not load plugin file: %s\n"), error->message);
g_clear_error (&error);
return -1;
}
} else {
g_printerr (_("No such element or plugin '%s'\n"), arg);
return -1;
}
}
}
}
return 0;
}
/**
* gst_device_provider_register:
* @plugin: (allow-none): #GstPlugin to register the device provider with, or %NULL for
* a static device provider.
* @name: name of device providers of this type
* @rank: rank of device provider (higher rank means more importance when autoplugging)
* @type: GType of device provider to register
*
* Create a new device providerfactory capable of instantiating objects of the
* @type and add the factory to @plugin.
*
* Returns: %TRUE, if the registering succeeded, %FALSE on error
*
* Since: 1.4
*/
gboolean
gst_device_provider_register (GstPlugin * plugin, const gchar * name,
guint rank, GType type)
{
GstPluginFeature *existing_feature;
GstRegistry *registry;
GstDeviceProviderFactory *factory;
GstDeviceProviderClass *klass;
g_return_val_if_fail (name != NULL, FALSE);
g_return_val_if_fail (g_type_is_a (type, GST_TYPE_DEVICE_PROVIDER), FALSE);
registry = gst_registry_get ();
/* check if feature already exists, if it exists there is no need to update it
* when the registry is getting updated, outdated plugins and all their
* features are removed and readded.
*/
existing_feature = gst_registry_lookup_feature (registry, name);
if (existing_feature) {
GST_DEBUG_OBJECT (registry, "update existing feature %p (%s)",
existing_feature, name);
factory = GST_DEVICE_PROVIDER_FACTORY_CAST (existing_feature);
factory->type = type;
existing_feature->loaded = TRUE;
g_type_set_qdata (type, __gst_deviceproviderclass_factory, factory);
gst_object_unref (existing_feature);
return TRUE;
}
factory =
GST_DEVICE_PROVIDER_FACTORY_CAST (g_object_newv
(GST_TYPE_DEVICE_PROVIDER_FACTORY, 0, NULL));
gst_plugin_feature_set_name (GST_PLUGIN_FEATURE_CAST (factory), name);
GST_LOG_OBJECT (factory, "Created new device providerfactory for type %s",
g_type_name (type));
/* provide info needed during class structure setup */
g_type_set_qdata (type, __gst_deviceproviderclass_factory, factory);
klass = GST_DEVICE_PROVIDER_CLASS (g_type_class_ref (type));
CHECK_METADATA_FIELD (klass, name, GST_ELEMENT_METADATA_LONGNAME);
CHECK_METADATA_FIELD (klass, name, GST_ELEMENT_METADATA_KLASS);
CHECK_METADATA_FIELD (klass, name, GST_ELEMENT_METADATA_DESCRIPTION);
CHECK_METADATA_FIELD (klass, name, GST_ELEMENT_METADATA_AUTHOR);
factory->type = type;
factory->metadata = gst_structure_copy ((GstStructure *) klass->metadata);
if (plugin && plugin->desc.name) {
GST_PLUGIN_FEATURE_CAST (factory)->plugin_name = plugin->desc.name;
GST_PLUGIN_FEATURE_CAST (factory)->plugin = plugin;
g_object_add_weak_pointer ((GObject *) plugin,
(gpointer *) & GST_PLUGIN_FEATURE_CAST (factory)->plugin);
} else {
GST_PLUGIN_FEATURE_CAST (factory)->plugin_name = "NULL";
GST_PLUGIN_FEATURE_CAST (factory)->plugin = NULL;
}
gst_plugin_feature_set_rank (GST_PLUGIN_FEATURE_CAST (factory), rank);
GST_PLUGIN_FEATURE_CAST (factory)->loaded = TRUE;
gst_registry_add_feature (registry, GST_PLUGIN_FEATURE_CAST (factory));
return TRUE;
/* ERRORS */
detailserror:
{
gst_device_provider_factory_cleanup (factory);
return FALSE;
}
}
/* Initialize the tracing system */
void
_priv_gst_tracing_init (void)
{
gint i = 0;
const gchar *env = g_getenv ("GST_TRACERS");
/* We initialize the tracer sub system even if the end
* user did not activate it through the env variable
* so that external tools can use it anyway */
GST_DEBUG ("Initializing GstTracer");
_priv_tracers = g_hash_table_new (NULL, NULL);
if (G_N_ELEMENTS (_quark_strings) != GST_TRACER_QUARK_MAX)
g_warning ("the quark table is not consistent! %d != %d",
(gint) G_N_ELEMENTS (_quark_strings), GST_TRACER_QUARK_MAX);
for (i = 0; i < GST_TRACER_QUARK_MAX; i++) {
_priv_gst_tracer_quark_table[i] =
g_quark_from_static_string (_quark_strings[i]);
}
if (env != NULL && *env != '\0') {
GstRegistry *registry = gst_registry_get ();
GstPluginFeature *feature;
GstTracerFactory *factory;
gchar **t = g_strsplit_set (env, ";", 0);
gchar *params;
GST_INFO ("enabling tracers: '%s'", env);
i = 0;
while (t[i]) {
// check t[i] for params
if ((params = strchr (t[i], '('))) {
gchar *end = strchr (¶ms[1], ')');
*params = '\0';
params++;
if (end)
*end = '\0';
} else {
params = NULL;
}
GST_INFO ("checking tracer: '%s'", t[i]);
if ((feature = gst_registry_lookup_feature (registry, t[i]))) {
factory = GST_TRACER_FACTORY (gst_plugin_feature_load (feature));
if (factory) {
GstTracer *tracer;
GST_INFO_OBJECT (factory, "creating tracer: type-id=%u",
(guint) factory->type);
tracer = g_object_new (factory->type, "params", params, NULL);
/* Clear floating flag */
gst_object_ref_sink (tracer);
/* tracers register them self to the hooks */
gst_object_unref (tracer);
} else {
GST_WARNING_OBJECT (feature,
"loading plugin containing feature %s failed!", t[i]);
}
} else {
GST_WARNING ("no tracer named '%s'", t[i]);
}
i++;
}
g_strfreev (t);
}
}
