gstreamermm
1.4.3
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An abstract base class for management of Gst::Plugin objects. More...
Public Member Functions | |
virtual | ~Registry () |
GstRegistry* | gobj () |
Provides access to the underlying C GObject. More... | |
const GstRegistry* | gobj () const |
Provides access to the underlying C GObject. More... | |
GstRegistry* | gobj_copy () |
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More... | |
Glib::ListHandle< Glib::RefPtr < Gst::PluginFeature > > | get_feature_list (GType type) |
Retrieves a List of Gst::PluginFeature of type. More... | |
Glib::ListHandle< Glib::RefPtr < const Gst::PluginFeature > > | get_feature_list (GType type) const |
Retrieves a List of Gst::PluginFeature of type. More... | |
guint32 | get_feature_list_cookie () const |
Returns the registrys feature list cookie. More... | |
Glib::ListHandle< Glib::RefPtr < Gst::PluginFeature > > | get_feature_list (const Glib::ustring& name) |
Retrieves a List of features of the plugin with name name. More... | |
Glib::ListHandle< Glib::RefPtr < const Gst::PluginFeature > > | get_feature_list (const Glib::ustring& name) const |
Retrieves a List of features of the plugin with name name. More... | |
Glib::ListHandle< Glib::RefPtr < Gst::Plugin > > | get_plugin_list () |
Get a copy of all plugins registered in the given registry. More... | |
Glib::ListHandle< Glib::RefPtr < const Gst::Plugin > > | get_plugin_list () const |
Get a copy of all plugins registered in the given registry. More... | |
bool | add_plugin (const Glib::RefPtr< Gst::Plugin >& plugin) |
Add the plugin to the registry. More... | |
void | remove_plugin (const Glib::RefPtr< Gst::Plugin >& plugin) |
Remove the plugin from the registry. More... | |
Glib::ListHandle< Glib::RefPtr < Gst::Plugin > > | get_plugin_list (const Plugin::SlotFilter& filter, bool first) |
Runs a filter against all plugins in the registry and returns a List with the results. More... | |
Glib::ListHandle< Glib::RefPtr < const Gst::Plugin > > | get_plugin_list (const Plugin::SlotFilter& filter, bool first) const |
Runs a filter against all plugins in the registry and returns a List with the results. More... | |
Glib::ListHandle< Glib::RefPtr < Gst::PluginFeature > > | get_feature_list (const PluginFeature::SlotFilter& filter, bool first) |
Runs a filter against all features of the plugins in the registry and returns a List with the results. More... | |
Glib::ListHandle< Glib::RefPtr < const Gst::PluginFeature > > | get_feature_list (const PluginFeature::SlotFilter& filter, bool first) const |
Runs a filter against all features of the plugins in the registry and returns a List with the results. More... | |
Glib::RefPtr< Gst::Plugin > | find_plugin (const Glib::ustring& name) |
Find the plugin with the given name in the registry. More... | |
Glib::RefPtr< const Gst::Plugin > | find_plugin (const Glib::ustring& name) const |
Find the plugin with the given name in the registry. More... | |
Glib::RefPtr< Gst::PluginFeature > | find_feature (const Glib::ustring& name, GType type) |
Find the pluginfeature with the given name and type in the registry. More... | |
Glib::RefPtr< const Gst::PluginFeature > | find_feature (const Glib::ustring& name, GType type) const |
Find the pluginfeature with the given name and type in the registry. More... | |
Glib::RefPtr< Gst::PluginFeature > | lookup_feature (const Glib::ustring& name) |
Find a Gst::PluginFeature with name in registry. More... | |
Glib::RefPtr< const Gst::PluginFeature > | lookup_feature (const Glib::ustring& name) const |
Find a Gst::PluginFeature with name in registry. More... | |
bool | scan_path (const Glib::ustring& path) |
Scan the given path for plugins to add to the registry. More... | |
Glib::RefPtr< Gst::Plugin > | lookup (const Glib::ustring& filename) |
Look up a plugin in the given registry with the given filename. More... | |
Glib::RefPtr< const Gst::Plugin > | lookup (const Glib::ustring& filename) const |
Look up a plugin in the given registry with the given filename. More... | |
void | remove_feature (const Glib::RefPtr< Gst::PluginFeature >& feature) |
Remove the feature from the registry. More... | |
void | add_feature (const Glib::RefPtr< Gst::PluginFeature >& feature) |
Add the feature to the registry. More... | |
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virtual | ~Object () |
GstObject* | gobj () |
Provides access to the underlying C GObject. More... | |
const GstObject* | gobj () const |
Provides access to the underlying C GObject. More... | |
GstObject* | gobj_copy () |
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More... | |
bool | is_element () const |
bool | is_element_factory () const |
bool | is_pad () const |
bool | is_pad_template () const |
bool | is_bin () const |
guint32 | get_flags () const |
Returns the entire set of flags for the object. More... | |
bool | set_name (const Glib::ustring& name) |
Sets the name of object, or gives object a guaranteed unique name (if name is 0 ). More... | |
Glib::ustring | get_name () const |
Returns a copy of the name of object. More... | |
bool | set_parent (const Glib::RefPtr< Gst::Object >& parent) |
Sets the parent of object to parent. More... | |
Glib::RefPtr< Gst::Object > | get_parent () |
Returns the parent of object. More... | |
Glib::RefPtr< const Gst::Object > | get_parent () const |
Returns the parent of object. More... | |
void | unparent () |
Clear the parent of object, removing the associated reference. More... | |
bool | has_ancestor (const Glib::RefPtr< const Gst::Object >& ancestor) const |
Check if object has an ancestor ancestor somewhere up in the hierarchy. More... | |
Glib::ustring | get_path_string () |
Generates a string describing the path of object in the object hierarchy. More... | |
Glib::PropertyProxy < Glib::ustring > | property_name () |
The name of the object. More... | |
Glib::PropertyProxy_ReadOnly < Glib::ustring > | property_name () const |
The name of the object. More... | |
Glib::SignalProxy2< void, const Glib::RefPtr< Object > &, GParamSpec* > | signal_deep_notify () |
int | get_refcount () const |
Static Public Member Functions | |
static GType | get_type () |
Get the GType for this class, for use with the underlying GObject type system. More... | |
static Glib::RefPtr < Gst::Registry > | get () |
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static GType | get_type () |
Get the GType for this class, for use with the underlying GObject type system. More... | |
static bool | check_uniqueness (const Glib::ListHandle< const Gst::Object >& list, const Glib::ustring& name) |
Checks to see if there is any object named name in list. More... | |
Related Functions | |
(Note that these are not member functions.) | |
Glib::RefPtr< Gst::Registry > | wrap (GstRegistry* object, bool take_copy=false) |
A Glib::wrap() method for this object. More... | |
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Glib::RefPtr< Gst::Object > | wrap (GstObject* object, bool take_copy=false) |
A Glib::wrap() method for this object. More... | |
Additional Inherited Members | |
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virtual void | on_deep_notify (const Glib::RefPtr< Object >& prop_object, GParamSpec* prop) |
This is a default handler for the signal signal_deep_notify(). More... | |
An abstract base class for management of Gst::Plugin objects.
One registry holds the metadata of a set of plugins.
Design:
The Gst::Registry object is a list of plugins and some functions for dealing with them. Each Gst::Plugin is matched 1-1 with a file on disk, and may or may not be loaded at a given time.
The primary source, at all times, of plugin information is each plugin file itself. Thus, if an application wants information about a particular plugin, or wants to search for a feature that satisfies given criteria, the primary means of doing so is to load every plugin and look at the resulting information that is gathered in the default registry. Clearly, this is a time consuming process, so we cache information in the registry file. The format and location of the cache file is internal to gstreamer.
On startup, plugins are searched for in the plugin search path. The following locations are checked in this order:
The registry cache file is loaded from ~/.gstreamer-$GST_API_VERSION/registry-$ARCH.bin or the file listed in the GST_REGISTRY env var. One reason to change the registry location is for testing.
For each plugin that is found in the plugin search path, there could be 3 possibilities for cached information:
In the first two cases, the plugin is loaded and the cache updated. In addition to these cases, the cache may have entries for plugins that are not relevant to the current process. These are marked as not available to the current process. If the cache is updated for whatever reason, it is marked dirty.
A dirty cache is written out at the end of initialization. Each entry is checked to make sure the information is minimally valid. If not, the entry is simply dropped.
Implementation notes:
The "cache" and "registry" are different concepts and can represent different sets of plugins. For various reasons, at init time, the cache is stored in the default registry, and plugins not relevant to the current process are marked with the GST_PLUGIN_FLAG_CACHED bit. These plugins are removed at the end of initialization.
Last reviewed on 2012-03-29 (0.11.3)
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virtual |
void Gst::Registry::add_feature | ( | const Glib::RefPtr< Gst::PluginFeature >& | feature | ) |
Add the feature to the registry.
The feature-added signal will be emitted. This function sinks feature.
feature | The feature to add. |
true
on success.MT safe.
bool Gst::Registry::add_plugin | ( | const Glib::RefPtr< Gst::Plugin >& | plugin | ) |
Add the plugin to the registry.
The plugin-added signal will be emitted. This function will sink plugin.
plugin | The plugin to add. |
true
on success.MT safe.
Glib::RefPtr<Gst::PluginFeature> Gst::Registry::find_feature | ( | const Glib::ustring & | name, |
GType | type | ||
) |
Find the pluginfeature with the given name and type in the registry.
name | The pluginfeature name to find. |
type | The pluginfeature type to find. |
0
if the plugin was not found. Gst::Object::unref() after usage.MT safe.
Glib::RefPtr<const Gst::PluginFeature> Gst::Registry::find_feature | ( | const Glib::ustring & | name, |
GType | type | ||
) | const |
Find the pluginfeature with the given name and type in the registry.
name | The pluginfeature name to find. |
type | The pluginfeature type to find. |
0
if the plugin was not found. Gst::Object::unref() after usage.MT safe.
Glib::RefPtr<Gst::Plugin> Gst::Registry::find_plugin | ( | const Glib::ustring & | name | ) |
Find the plugin with the given name in the registry.
The plugin will be reffed; caller is responsible for unreffing.
name | The plugin name to find. |
0
if the plugin was not found. Gst::Object::unref() after usage.MT safe.
Glib::RefPtr<const Gst::Plugin> Gst::Registry::find_plugin | ( | const Glib::ustring & | name | ) | const |
Find the plugin with the given name in the registry.
The plugin will be reffed; caller is responsible for unreffing.
name | The plugin name to find. |
0
if the plugin was not found. Gst::Object::unref() after usage.MT safe.
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static |
Glib::ListHandle< Glib::RefPtr<Gst::PluginFeature> > Gst::Registry::get_feature_list | ( | GType | type | ) |
Retrieves a List of Gst::PluginFeature of type.
type | A Type. |
MT safe.
Glib::ListHandle< Glib::RefPtr<const Gst::PluginFeature> > Gst::Registry::get_feature_list | ( | GType | type | ) | const |
Retrieves a List of Gst::PluginFeature of type.
type | A Type. |
MT safe.
Glib::ListHandle< Glib::RefPtr<Gst::PluginFeature> > Gst::Registry::get_feature_list | ( | const Glib::ustring & | name | ) |
Retrieves a List of features of the plugin with name name.
name | A plugin name. |
Glib::ListHandle< Glib::RefPtr<const Gst::PluginFeature> > Gst::Registry::get_feature_list | ( | const Glib::ustring & | name | ) | const |
Retrieves a List of features of the plugin with name name.
name | A plugin name. |
Glib::ListHandle< Glib::RefPtr<Gst::PluginFeature> > Gst::Registry::get_feature_list | ( | const PluginFeature::SlotFilter& | filter, |
bool | first | ||
) |
Runs a filter against all features of the plugins in the registry and returns a List with the results.
If the first flag is set, only the first match is returned (as a list with a single object).
registry | Registry to query. |
filter | The filter to use. |
first | Only return first match. |
Glib::ListHandle< Glib::RefPtr<const Gst::PluginFeature> > Gst::Registry::get_feature_list | ( | const PluginFeature::SlotFilter& | filter, |
bool | first | ||
) | const |
Runs a filter against all features of the plugins in the registry and returns a List with the results.
If the first flag is set, only the first match is returned (as a list with a single object).
registry | Registry to query. |
filter | The filter to use. |
first | Only return first match. |
guint32 Gst::Registry::get_feature_list_cookie | ( | ) | const |
Returns the registrys feature list cookie.
This changes every time a feature is added or removed from the registry.
Glib::ListHandle< Glib::RefPtr<Gst::Plugin> > Gst::Registry::get_plugin_list | ( | ) |
Get a copy of all plugins registered in the given registry.
The refcount of each element in the list in incremented.
MT safe.
Glib::ListHandle< Glib::RefPtr<const Gst::Plugin> > Gst::Registry::get_plugin_list | ( | ) | const |
Get a copy of all plugins registered in the given registry.
The refcount of each element in the list in incremented.
MT safe.
Glib::ListHandle< Glib::RefPtr<Gst::Plugin> > Gst::Registry::get_plugin_list | ( | const Plugin::SlotFilter& | filter, |
bool | first | ||
) |
Runs a filter against all plugins in the registry and returns a List with the results.
If the first flag is set, only the first match is returned (as a list with a single object).
filter | The filter to use. |
first | Only return first match. |
Glib::ListHandle< Glib::RefPtr<const Gst::Plugin> > Gst::Registry::get_plugin_list | ( | const Plugin::SlotFilter& | filter, |
bool | first | ||
) | const |
Runs a filter against all plugins in the registry and returns a List with the results.
If the first flag is set, only the first match is returned (as a list with a single object).
filter | The filter to use. |
first | Only return first match. |
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static |
Get the GType for this class, for use with the underlying GObject type system.
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inline |
Provides access to the underlying C GObject.
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inline |
Provides access to the underlying C GObject.
GstRegistry* Gst::Registry::gobj_copy | ( | ) |
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
Glib::RefPtr<Gst::Plugin> Gst::Registry::lookup | ( | const Glib::ustring & | filename | ) |
Look up a plugin in the given registry with the given filename.
If found, plugin is reffed.
filename | The name of the file to look up. |
0
if not. Gst::Object::unref() after usage. Glib::RefPtr<const Gst::Plugin> Gst::Registry::lookup | ( | const Glib::ustring & | filename | ) | const |
Look up a plugin in the given registry with the given filename.
If found, plugin is reffed.
filename | The name of the file to look up. |
0
if not. Gst::Object::unref() after usage. Glib::RefPtr<Gst::PluginFeature> Gst::Registry::lookup_feature | ( | const Glib::ustring & | name | ) |
Find a Gst::PluginFeature with name in registry.
name | A Gst::PluginFeature name. |
MT safe.
Glib::RefPtr<const Gst::PluginFeature> Gst::Registry::lookup_feature | ( | const Glib::ustring & | name | ) | const |
Find a Gst::PluginFeature with name in registry.
name | A Gst::PluginFeature name. |
MT safe.
void Gst::Registry::remove_feature | ( | const Glib::RefPtr< Gst::PluginFeature >& | feature | ) |
Remove the feature from the registry.
MT safe.
feature | The feature to remove. |
void Gst::Registry::remove_plugin | ( | const Glib::RefPtr< Gst::Plugin >& | plugin | ) |
Remove the plugin from the registry.
MT safe.
plugin | The plugin to remove. |
bool Gst::Registry::scan_path | ( | const Glib::ustring & | path | ) |
Scan the given path for plugins to add to the registry.
The syntax of the path is specific to the registry.
path | The path to scan. |
true
if registry changed.
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related |
A Glib::wrap() method for this object.
object | The C instance. |
take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref. |