int
iterate_plugins_elements (GstElementFactory *factory, GHashTable *hashtable)
{
GstElement *element;
const GList *pads;
GstStaticPadTemplate *padtemplate;
const GstCaps * caps;
int i;
factory =
GST_ELEMENT_FACTORY (gst_plugin_feature_load (GST_PLUGIN_FEATURE
(factory)));
if (!factory)
{
g_error ("element plugin couldn't be loaded");
return -1;
}
element = gst_element_factory_create (factory, NULL);
if (!element)
{
g_error ("couldn't construct element for some reason");
return -1;
}
if (factory->numpadtemplates)
{
pads = factory->staticpadtemplates;
while (pads)
{
padtemplate = (GstStaticPadTemplate *) (pads->data);
pads = g_list_next (pads);
if (padtemplate->direction == GST_PAD_SINK
&& padtemplate->presence == GST_PAD_ALWAYS
&& padtemplate->static_caps.string) {
caps = gst_static_caps_get (&padtemplate->static_caps);
if (caps != NULL && !gst_caps_is_any (caps) && !gst_caps_is_empty (caps))
{
for (i = 0; i < gst_caps_get_size (caps); i++)
{
GstStructure *structure = gst_caps_get_structure (caps, i);
const gchar *mime = gst_structure_get_name (structure);
if (g_str_has_prefix (mime, "audio"))
{
g_hash_table_insert(hashtable, (gpointer)mime, (gpointer)&ONE);
}
}
}
}
}
}
gst_object_unref (element);
gst_object_unref (factory);
return 0;
}
static int
print_element_info (GstElementFactory * factory, gboolean print_names)
{
GstElement *element;
gint maxlevel = 0;
factory =
GST_ELEMENT_FACTORY (gst_plugin_feature_load (GST_PLUGIN_FEATURE
(factory)));
if (!factory) {
g_print ("element plugin couldn't be loaded\n");
return -1;
}
element = gst_element_factory_create (factory, NULL);
if (!element) {
g_print ("couldn't construct element for some reason\n");
return -1;
}
if (print_names)
_name = g_strdup_printf ("%s: ", GST_PLUGIN_FEATURE (factory)->name);
else
_name = NULL;
print_factory_details_info (factory);
if (GST_PLUGIN_FEATURE (factory)->plugin_name) {
GstPlugin *plugin;
plugin = gst_registry_find_plugin (gst_registry_get_default (),
GST_PLUGIN_FEATURE (factory)->plugin_name);
if (plugin) {
print_plugin_info (plugin);
}
}
print_hierarchy (G_OBJECT_TYPE (element), 0, &maxlevel);
print_interfaces (G_OBJECT_TYPE (element));
print_pad_templates_info (element, factory);
print_element_flag_info (element);
print_implementation_info (element);
print_clocking_info (element);
print_index_info (element);
print_uri_handler_info (element);
print_pad_info (element);
print_element_properties_info (element);
print_signal_info (element);
print_children_info (element);
gst_object_unref (element);
gst_object_unref (factory);
g_free (_name);
return 0;
}
static GstFlowReturn
gst_type_find_element_chain (GstPad * pad, GstBuffer * buffer)
{
res = gst_type_find_element_chain_do_typefinding (typefind);
{
GstCaps *caps;
caps = gst_type_find_helper_for_buffer (GST_OBJECT (typefind),
typefind->store, &probability);
// gstreamer/libs/gst/base/gsttypefindhelper.c
// All available typefinders will be called on the data in order of rank. If
// a typefinding function returns a probability of #GST_TYPE_FIND_MAXIMUM,
// typefinding is stopped immediately and the found caps will be returned
// right away. Otherwise, all available typefind functions will the tried,
// and the caps with the highest probability will be returned
{
type_list = gst_type_find_factory_get_list ();
type_list = g_list_sort (type_list, type_find_factory_rank_cmp);
gst_type_find_factory_call_function (helper.factory, &find);
{
// find function from factory
new_factory =
GST_TYPE_FIND_FACTORY (gst_plugin_feature_load (GST_PLUGIN_FEATURE (factory)));
new_factory->function (find, new_factory->user_data);
gst_object_unref (new_factory);
} // gst_type_find_factory_call_function()
} // gst_type_find_helper_for_buffer()
/* probability is good enough too, so let's make it known ... */
g_signal_emit (typefind, gst_type_find_element_signals[HAVE_TYPE], 0,
probability, caps);
// stop typefind
stop_typefinding (typefind);
{
// TODO: why set itself to NULL?
gst_element_get_state (GST_ELEMENT (typefind), &state, NULL, 0);
// reset state to normal
typefind->mode = MODE_NORMAL;
// send cache event and buffers
gst_type_find_element_send_cached_events (typefind);
gst_pad_push (typefind->src, typefind->store);
}
} // gst_type_find_element_chain_do_typefinding()
}
/**
* gst_type_find_factory_call_function:
* @factory: A #GstTypeFindFactory
* @find: (transfer none): a properly setup #GstTypeFind entry. The get_data
* and suggest_type members must be set.
*
* Calls the #GstTypeFindFunction associated with this factory.
*/
void
gst_type_find_factory_call_function (GstTypeFindFactory * factory,
GstTypeFind * find)
{
GstTypeFindFactory *new_factory;
g_return_if_fail (GST_IS_TYPE_FIND_FACTORY (factory));
g_return_if_fail (find != NULL);
g_return_if_fail (find->peek != NULL);
g_return_if_fail (find->suggest != NULL);
new_factory =
GST_TYPE_FIND_FACTORY (gst_plugin_feature_load (GST_PLUGIN_FEATURE
(factory)));
if (new_factory) {
if (new_factory->function)
new_factory->function (find, new_factory->user_data);
gst_object_unref (new_factory);
}
}
static GstElement *
gst_auto_convert_get_or_make_element_from_factory (GstAutoConvert * autoconvert,
GstElementFactory * factory)
{
GstElement *element = NULL;
GstElementFactory *loaded_factory =
GST_ELEMENT_FACTORY (gst_plugin_feature_load (GST_PLUGIN_FEATURE
(factory)));
if (!loaded_factory)
return NULL;
element = gst_auto_convert_get_element_by_type (autoconvert,
gst_element_factory_get_element_type (loaded_factory));
if (!element) {
element = gst_auto_convert_add_element (autoconvert, loaded_factory);
}
gst_object_unref (loaded_factory);
return element;
}
/* 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_factory_create:
* @factory: factory to instantiate
* @name: (allow-none): name of new element, or NULL to automatically create
* a unique name
*
* Create a new element of the type defined by the given elementfactory.
* It will be given the name supplied, since all elements require a name as
* their first argument.
*
* Returns: (transfer full): new #GstElement or NULL if the element couldn't
* be created
*/
GstElement *
gst_element_factory_create (GstElementFactory * factory, const gchar * name)
{
GstElement *element;
GstElementClass *oclass;
GstElementFactory *newfactory;
g_return_val_if_fail (factory != NULL, NULL);
newfactory =
GST_ELEMENT_FACTORY (gst_plugin_feature_load (GST_PLUGIN_FEATURE
(factory)));
if (newfactory == NULL)
goto load_failed;
factory = newfactory;
if (name)
GST_INFO ("creating element \"%s\" named \"%s\"",
GST_PLUGIN_FEATURE_NAME (factory), GST_STR_NULL (name));
else
GST_INFO ("creating element \"%s\"", GST_PLUGIN_FEATURE_NAME (factory));
if (factory->type == 0)
goto no_type;
/* create an instance of the element, cast so we don't assert on NULL
* also set name as early as we can
*/
if (name)
element =
GST_ELEMENT_CAST (g_object_new (factory->type, "name", name, NULL));
else
element = GST_ELEMENT_CAST (g_object_newv (factory->type, 0, NULL));
if (G_UNLIKELY (element == NULL))
goto no_element;
/* fill in the pointer to the factory in the element class. The
* class will not be unreffed currently.
* Be thread safe as there might be 2 threads creating the first instance of
* an element at the same moment
*/
oclass = GST_ELEMENT_GET_CLASS (element);
if (!G_ATOMIC_POINTER_COMPARE_AND_EXCHANGE (&oclass->elementfactory, NULL,
factory))
gst_object_unref (factory);
GST_DEBUG ("created element \"%s\"", GST_PLUGIN_FEATURE_NAME (factory));
return element;
/* ERRORS */
load_failed:
{
GST_WARNING_OBJECT (factory,
"loading plugin containing feature %s returned NULL!", name);
return NULL;
}
no_type:
{
GST_WARNING_OBJECT (factory, "factory has no type");
gst_object_unref (factory);
return NULL;
}
no_element:
{
GST_WARNING_OBJECT (factory, "could not create element");
gst_object_unref (factory);
return NULL;
}
}
static void
print_all_uri_handlers (void)
{
GList *plugins, *p, *features, *f;
plugins = gst_registry_get_plugin_list (gst_registry_get ());
for (p = plugins; p; p = p->next) {
GstPlugin *plugin = (GstPlugin *) (p->data);
features =
gst_registry_get_feature_list_by_plugin (gst_registry_get (),
gst_plugin_get_name (plugin));
for (f = features; f; f = f->next) {
GstPluginFeature *feature = GST_PLUGIN_FEATURE (f->data);
if (GST_IS_ELEMENT_FACTORY (feature)) {
GstElementFactory *factory;
GstElement *element;
factory = GST_ELEMENT_FACTORY (gst_plugin_feature_load (feature));
if (!factory) {
g_print ("element plugin %s couldn't be loaded\n",
gst_plugin_get_name (plugin));
continue;
}
element = gst_element_factory_create (factory, NULL);
if (!element) {
g_print ("couldn't construct element for %s for some reason\n",
GST_OBJECT_NAME (factory));
gst_object_unref (factory);
continue;
}
if (GST_IS_URI_HANDLER (element)) {
const gchar *const *uri_protocols;
const gchar *dir;
gchar *joined;
switch (gst_uri_handler_get_uri_type (GST_URI_HANDLER (element))) {
case GST_URI_SRC:
dir = "read";
break;
case GST_URI_SINK:
dir = "write";
break;
default:
dir = "unknown";
break;
}
uri_protocols =
gst_uri_handler_get_protocols (GST_URI_HANDLER (element));
joined = g_strjoinv (", ", (gchar **) uri_protocols);
g_print ("%s (%s, rank %u): %s\n",
gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)), dir,
gst_plugin_feature_get_rank (GST_PLUGIN_FEATURE (factory)),
joined);
g_free (joined);
}
gst_object_unref (element);
gst_object_unref (factory);
}
}
gst_plugin_feature_list_free (features);
}
gst_plugin_list_free (plugins);
}
/**
* gst_device_provider_factory_get:
* @factory: factory to instantiate
*
* Returns the device provider of the type defined by the given device
* providerfactory.
*
* Returns: (transfer full) (nullable): the #GstDeviceProvider or %NULL
* if the device provider couldn't be created
*
* Since: 1.4
*/
GstDeviceProvider *
gst_device_provider_factory_get (GstDeviceProviderFactory * factory)
{
GstDeviceProvider *device_provider;
GstDeviceProviderClass *oclass;
GstDeviceProviderFactory *newfactory;
g_return_val_if_fail (factory != NULL, NULL);
newfactory =
GST_DEVICE_PROVIDER_FACTORY (gst_plugin_feature_load (GST_PLUGIN_FEATURE
(factory)));
if (newfactory == NULL)
goto load_failed;
factory = newfactory;
GST_INFO ("getting device provider \"%s\"", GST_OBJECT_NAME (factory));
if (factory->type == 0)
goto no_type;
device_provider = g_atomic_pointer_get (&newfactory->provider);
if (device_provider)
return gst_object_ref (device_provider);
/* create an instance of the device provider, cast so we don't assert on NULL
* also set name as early as we can
*/
device_provider = GST_DEVICE_PROVIDER_CAST (g_object_newv (factory->type, 0,
NULL));
if (G_UNLIKELY (device_provider == NULL))
goto no_device_provider;
/* fill in the pointer to the factory in the device provider class. The
* class will not be unreffed currently.
* Be thread safe as there might be 2 threads creating the first instance of
* an device provider at the same moment
*/
oclass = GST_DEVICE_PROVIDER_GET_CLASS (device_provider);
if (!g_atomic_pointer_compare_and_exchange (&oclass->factory, NULL, factory))
gst_object_unref (factory);
gst_object_ref_sink (device_provider);
/* We use an atomic to make sure we don't create two in parallel */
if (!g_atomic_pointer_compare_and_exchange (&newfactory->provider, NULL,
device_provider)) {
gst_object_unref (device_provider);
device_provider = g_atomic_pointer_get (&newfactory->provider);
}
GST_DEBUG ("created device provider \"%s\"", GST_OBJECT_NAME (factory));
return gst_object_ref (device_provider);
/* ERRORS */
load_failed:
{
GST_WARNING_OBJECT (factory,
"loading plugin containing feature %s returned NULL!",
GST_OBJECT_NAME (factory));
return NULL;
}
no_type:
{
GST_WARNING_OBJECT (factory, "factory has no type");
gst_object_unref (factory);
return NULL;
}
no_device_provider:
{
GST_WARNING_OBJECT (factory, "could not create device provider");
gst_object_unref (factory);
return NULL;
}
}
/* 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);
}
}
