A host-provided function to retrieve a property.
@param handle Must be the handle passed to LV2_State_Interface.restore().
@param key The key of the property to retrieve (URID).
@param size (Output) If non-NULL, set to the size of the restored value.
@param type (Output) If non-NULL, set to the type of the restored value.
@param flags (Output) If non-NULL, set to the flags for the restored value.
@return A pointer to the restored value (object), or NULL if no value
has been stored under key.
A callback of this type is passed by the host to
LV2_State_Interface.restore(). This callback is called repeatedly by the
plugin to retrieve any properties it requires to restore its state.
The returned value MUST remain valid until LV2_State_Interface.restore()
returns. The plugin MUST NOT attempt to use this function, or any value
returned from it, outside of the LV2_State_Interface.restore() context.
A host-provided function to retrieve a property. @param handle Must be the handle passed to LV2_State_Interface.restore(). @param key The key of the property to retrieve (URID). @param size (Output) If non-NULL, set to the size of the restored value. @param type (Output) If non-NULL, set to the type of the restored value. @param flags (Output) If non-NULL, set to the flags for the restored value. @return A pointer to the restored value (object), or NULL if no value has been stored under key.
A callback of this type is passed by the host to LV2_State_Interface.restore(). This callback is called repeatedly by the plugin to retrieve any properties it requires to restore its state.
The returned value MUST remain valid until LV2_State_Interface.restore() returns. The plugin MUST NOT attempt to use this function, or any value returned from it, outside of the LV2_State_Interface.restore() context.