struct GstPresetInterface
struct GstPresetInterface {
GTypeInterface parent;
/* methods */
gchar** (*get_preset_names) (GstPreset *preset);
gchar** (*get_property_names) (GstPreset *preset);
gboolean (*load_preset) (GstPreset *preset, const gchar *name);
gboolean (*save_preset) (GstPreset *preset, const gchar *name);
gboolean (*rename_preset) (GstPreset *preset, const gchar *old_name,
const gchar *new_name);
gboolean (*delete_preset) (GstPreset *preset, const gchar *name);
gboolean (*set_meta) (GstPreset *preset, const gchar *name,
const gchar *tag, const gchar *value);
gboolean (*get_meta) (GstPreset *preset, const gchar *name,
const gchar *tag, gchar **value);
};