Public Member Functions | Static Public Member Functions | Related Functions

Gst::Preset Class Reference
[gstreamermm Interfaces]

A helper interface for element presets. More...

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List of all members.

Public Member Functions

virtual ~Preset ()
GstPreset* gobj ()
 Provides access to the underlying C GObject.
const GstPreset* gobj () const
 Provides access to the underlying C GObject.
Glib::StringArrayHandle get_preset_names () const
 Get a copy of preset names as a 0 terminated string array.
Glib::StringArrayHandle get_property_names () const
 Get a the names of the GObject properties that can be used for presets.
bool load_preset (const Glib::ustring& name)
 Load the given preset.
bool save_preset (const Glib::ustring& name)
 Save the current object settings as a preset under the given name.
bool rename_preset (const Glib::ustring& old_name, const Glib::ustring& new_name)
 Renames a preset.
bool delete_preset (const Glib::ustring& name)
 Delete the given preset.
bool set_meta (const Glib::ustring& name, const Glib::ustring& tag, const Glib::ustring&value)
 Sets a new value for an existing meta data item or adds a new item.
bool get_meta (const Glib::ustring& name, const Glib::ustring& tag, Glib::ustring&value) const
 Gets the value for an existing meta data tag.
virtual Glib::StringArrayHandle get_preset_names_vfunc () const
virtual Glib::StringArrayHandle get_property_names_vfunc () const
virtual bool load_preset_vfunc (const Glib::ustring& name)
virtual bool save_preset_vfunc (const Glib::ustring& name) const
virtual bool rename_preset_vfunc (const Glib::ustring& old_name, const Glib::ustring& new_name)
virtual bool delete_preset_vfunc (const Glib::ustring& name)
virtual bool set_meta_vfunc (const Glib::ustring& name, const Glib::ustring& tag, const Glib::ustring&value)
virtual bool get_meta_vfunc (const Glib::ustring& name, const Glib::ustring& tag, Glib::ustring&value) const

Static Public Member Functions

static void add_interface (GType gtype_implementer)

Related Functions

(Note that these are not member functions.)


Glib::RefPtr< Gst::Presetwrap (GstPreset* object, bool take_copy=false)
 A Glib::wrap() method for this object.

Detailed Description

A helper interface for element presets.

This interface offers methods to query and manipulate parameter preset sets. A preset is a bunch of property settings, together with meta data and a name. The name of a preset serves as key for subsequent method calls to manipulate single presets. All instances of one type will share the list of presets. The list is created on demand, if presets are not used, the list is not created.

The interface comes with a default implementation that serves most plugins. Wrapper plugins will override most methods to implement support for the native preset format of those wrapped plugins. One method that is useful to be overridden is property_names_vfunc(). With that, one can control which properties are saved and in which order.


Constructor & Destructor Documentation

virtual Gst::Preset::~Preset (  ) [virtual]

Member Function Documentation

static void Gst::Preset::add_interface ( GType  gtype_implementer ) [static]
bool Gst::Preset::delete_preset ( const Glib::ustring name )

Delete the given preset.

Since gstreamermm 0.10:
.20
Parameters:
namePreset name to remove.
Returns:
true for success, false if e.g. there is no preset with that name.
virtual bool Gst::Preset::delete_preset_vfunc ( const Glib::ustring name ) [virtual]
bool Gst::Preset::get_meta ( const Glib::ustring name,
const Glib::ustring tag,
Glib::ustring value 
) const

Gets the value for an existing meta data tag.

Meta data tag names can be something like e.g. "comment". Returned values need to be released when done.

Since gstreamermm 0.10:
.20
Parameters:
namePreset name.
tagMeta data item name.
valueValue.
Returns:
true for success, false if e.g. there is no preset with that name or no value for the given tag.
virtual bool Gst::Preset::get_meta_vfunc ( const Glib::ustring name,
const Glib::ustring tag,
Glib::ustring value 
) const [virtual]
Glib::StringArrayHandle Gst::Preset::get_preset_names (  ) const

Get a copy of preset names as a 0 terminated string array.

Since gstreamermm 0.10:
.20
Returns:
List with names, ue Glib::strfreev() after usage.
virtual Glib::StringArrayHandle Gst::Preset::get_preset_names_vfunc (  ) const [virtual]
Glib::StringArrayHandle Gst::Preset::get_property_names (  ) const

Get a the names of the GObject properties that can be used for presets.

Since gstreamermm 0.10:
.20
Returns:
An array of property names which should be freed with Glib::strfreev() after use.
virtual Glib::StringArrayHandle Gst::Preset::get_property_names_vfunc (  ) const [virtual]
GstPreset* Gst::Preset::gobj (  ) [inline]

Provides access to the underlying C GObject.

Reimplemented from Glib::Interface.

Reimplemented in Gst::OggMux, Gst::TheoraEnc, and Gst::VorbisEnc.

const GstPreset* Gst::Preset::gobj (  ) const [inline]

Provides access to the underlying C GObject.

Reimplemented from Glib::Interface.

Reimplemented in Gst::OggMux, Gst::TheoraEnc, and Gst::VorbisEnc.

bool Gst::Preset::load_preset ( const Glib::ustring name )

Load the given preset.

Since gstreamermm 0.10:
.20
Parameters:
namePreset name to load.
Returns:
true for success, false if e.g. there is no preset with that name.
virtual bool Gst::Preset::load_preset_vfunc ( const Glib::ustring name ) [virtual]
bool Gst::Preset::rename_preset ( const Glib::ustring old_name,
const Glib::ustring new_name 
)

Renames a preset.

If there is already a preset by the new_name it will be overwritten.

Since gstreamermm 0.10:
.20
Parameters:
old_nameCurrent preset name.
new_nameNew preset name.
Returns:
true for success, false if e.g. there is no preset with old_name.
virtual bool Gst::Preset::rename_preset_vfunc ( const Glib::ustring old_name,
const Glib::ustring new_name 
) [virtual]
bool Gst::Preset::save_preset ( const Glib::ustring name )

Save the current object settings as a preset under the given name.

If there is already a preset by this name it will be overwritten.

Since gstreamermm 0.10:
.20
Parameters:
namePreset name to save.
Returns:
true for success, false.
virtual bool Gst::Preset::save_preset_vfunc ( const Glib::ustring name ) const [virtual]
bool Gst::Preset::set_meta ( const Glib::ustring name,
const Glib::ustring tag,
const Glib::ustring value 
)

Sets a new value for an existing meta data item or adds a new item.

Meta data tag names can be something like e.g. "comment". Supplying 0 for the value will unset an existing value.

Since gstreamermm 0.10:
.20
Parameters:
namePreset name.
tagMeta data item name.
valueNew value.
Returns:
true for success, false if e.g. there is no preset with that name.
virtual bool Gst::Preset::set_meta_vfunc ( const Glib::ustring name,
const Glib::ustring tag,
const Glib::ustring value 
) [virtual]

Friends And Related Function Documentation

Glib::RefPtr< Gst::Preset > wrap ( GstPreset *  object,
bool  take_copy = false 
) [related]

A Glib::wrap() method for this object.

Parameters:
objectThe C instance.
take_copyFalse if the result should take ownership of the C instance. True if it should take a new copy or ref.
Returns:
A C++ instance that wraps this C instance.

The documentation for this class was generated from the following file: