A helper interface for element presets. More...
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.
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Glib::StringArrayHandle | get_preset_names () const |
| Get a copy of preset names as a 0 terminated string array.
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Glib::StringArrayHandle | get_property_names () const |
| Get a the names of the GObject properties that can be used for presets.
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bool | load_preset (const Glib::ustring& name) |
| Load the given preset.
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bool | save_preset (const Glib::ustring& name) |
| Save the current object settings as a preset under the given name.
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bool | rename_preset (const Glib::ustring& old_name, const Glib::ustring& new_name) |
| Renames a preset.
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bool | delete_preset (const Glib::ustring& name) |
| Delete the given preset.
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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.
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bool | get_meta (const Glib::ustring& name, const Glib::ustring& tag, Glib::ustring&value) const |
| Gets the value for an existing meta data tag.
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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.)
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Glib::RefPtr< Gst::Preset > | wrap (GstPreset* object, bool take_copy=false) |
| A Glib::wrap() method for this object.
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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] |
Delete the given preset.
- Since gstreamermm 0.10:
- .20
- Parameters:
-
- 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] |
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:
-
name | Preset name. |
tag | Meta data item name. |
value | Value. |
- Returns:
true
for success, false
if e.g. there is no preset with that name or no value for the given tag.
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.
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.
GstPreset* Gst::Preset::gobj |
( |
) |
[inline] |
const GstPreset* Gst::Preset::gobj |
( |
) |
const [inline] |
Load the given preset.
- Since gstreamermm 0.10:
- .20
- Parameters:
-
- 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] |
Renames a preset.
If there is already a preset by the new_name it will be overwritten.
- Since gstreamermm 0.10:
- .20
- Parameters:
-
old_name | Current preset name. |
new_name | New preset name. |
- Returns:
true
for success, false
if e.g. there is no preset with old_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:
-
- Returns:
true
for success, false
.
virtual bool Gst::Preset::save_preset_vfunc |
( |
const Glib::ustring & |
name ) |
const [virtual] |
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:
-
name | Preset name. |
tag | Meta data item name. |
value | New value. |
- Returns:
true
for success, false
if e.g. there is no preset with that name.
Friends And Related Function Documentation
A Glib::wrap() method for this object.
- Parameters:
-
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. |
- Returns:
- A C++ instance that wraps this C instance.
The documentation for this class was generated from the following file: