MetaContainer

Object Hierarchy:

Description:

[ CCode ( type_cname = "GESMetaContainerInterface" , type_id = "ges_meta_container_get_type ()" ) ]
public interface MetaContainer : Object

A Object that implements MetaContainer can have metadata set on it, that is data that is unimportant to its function within GES, but may hold some useful information.

In particular, set_meta can be used to store any Value under any generic field (specified by a string key). The same method can also be used to remove the field by passing null. A number of convenience methods are also provided to make it easier to set common value types. The metadata can then be read with get_meta and similar convenience methods.

Registered Fields

By default, any Value can be set for a metadata field. However, you can register some fields as static, that is they only allow values of a specific type to be set under them, using register_meta or register_static_meta. The set MetaFlag will determine whether the value can be changed, but even if it can be changed, it must be changed to a value of the same type.

Internally, some GES objects will be initialized with static metadata fields. These will correspond to some standard keys, such as META_VOLUME.

All known implementing classes:

Namespace: GES

Package: gst-editing-services-1.0

Content:

Methods:

public void @foreach (MetaForeachFunc func)
Calls the given function on each of the meta container's set metadata fields.
public bool add_metas_from_string (string str)
Deserializes the given string, and adds and sets the found fields and their values on the container.
public bool check_meta_registered (string meta_item, out MetaFlag flags, out Type type)
Checks whether the specified field has been registered as static, and gets the registered type and flags of the field, as used in register_meta and register_static_meta.
public bool get_boolean (string meta_item, out bool dest)
Gets the current boolean value of the specified field of the meta container.
public bool get_date (string meta_item, out Date dest)
Gets the current date value of the specified field of the meta container.
public bool get_date_time (string meta_item, out DateTime dest)
Gets the current date time value of the specified field of the meta container.
public bool get_double (string meta_item, out double dest)
Gets the current double value of the specified field of the meta container.
public bool get_float (string meta_item, out float dest)
Gets the current float value of the specified field of the meta container.
public bool get_int (string meta_item, out int dest)
Gets the current int value of the specified field of the meta container.
public bool get_int64 (string meta_item, out int64 dest)
Gets the current int64 value of the specified field of the meta container.
public MarkerList? get_marker_list (string key)
Gets the current marker list value of the specified field of the meta container.
public unowned Value? get_meta (string key)
Gets the current value of the specified field of the meta container.
public unowned string? get_string (string meta_item)
Gets the current string value of the specified field of the meta container.
public bool get_uint (string meta_item, out uint dest)
Gets the current uint value of the specified field of the meta container.
public bool get_uint64 (string meta_item, out uint64 dest)
Gets the current uint64 value of the specified field of the meta container.
public string metas_to_string ()
Serializes the set metadata fields of the meta container to a string.
public bool register_meta (MetaFlag flags, string meta_item, Value value)
Sets the value of the specified field of the meta container to the given value, and registers the field to only hold a value of the same type.
public bool register_meta_boolean (MetaFlag flags, string meta_item, bool value)
Sets the value of the specified field of the meta container to the given boolean value, and registers the field to only hold a boolean typed value.
public bool register_meta_date (MetaFlag flags, string meta_item, Date value)
Sets the value of the specified field of the meta container to the given date value, and registers the field to only hold a date typed value.
public bool register_meta_date_time (MetaFlag flags, string meta_item, DateTime value)
Sets the value of the specified field of the meta container to the given date time value, and registers the field to only hold a date time typed value.
public bool register_meta_double (MetaFlag flags, string meta_item, double value)
Sets the value of the specified field of the meta container to the given double value, and registers the field to only hold a double typed value.
public bool register_meta_float (MetaFlag flags, string meta_item, float value)
Sets the value of the specified field of the meta container to the given float value, and registers the field to only hold a float typed value.
public bool register_meta_int (MetaFlag flags, string meta_item, int value)
Sets the value of the specified field of the meta container to the given int value, and registers the field to only hold an int typed value.
public bool register_meta_int64 (MetaFlag flags, string meta_item, int64 value)
Sets the value of the specified field of the meta container to the given int64 value, and registers the field to only hold an int64 typed value.
public bool register_meta_string (MetaFlag flags, string meta_item, string value)
Sets the value of the specified field of the meta container to the given string value, and registers the field to only hold a string typed value.
public bool register_meta_uint (MetaFlag flags, string meta_item, uint value)
Sets the value of the specified field of the meta container to the given uint value, and registers the field to only hold a uint typed value.
public bool register_meta_uint64 (MetaFlag flags, string meta_item, uint64 value)
Sets the value of the specified field of the meta container to the given uint64 value, and registers the field to only hold a uint64 typed value.
public bool register_static_meta (MetaFlag flags, string meta_item, Type type)
Registers a static metadata field on the container to only hold the specified type.
public bool set_boolean (string meta_item, bool value)
Sets the value of the specified field of the meta container to the given boolean value.
public bool set_date (string meta_item, Date value)
Sets the value of the specified field of the meta container to the given date value.
public bool set_date_time (string meta_item, DateTime value)
Sets the value of the specified field of the meta container to the given date time value.
public bool set_double (string meta_item, double value)
Sets the value of the specified field of the meta container to the given double value.
public bool set_float (string meta_item, float value)
Sets the value of the specified field of the meta container to the given float value.
public bool set_int (string meta_item, int value)
Sets the value of the specified field of the meta container to the given int value.
public bool set_int64 (string meta_item, int64 value)
Sets the value of the specified field of the meta container to the given int64 value.
public bool set_marker_list (string meta_item, MarkerList list)
Sets the value of the specified field of the meta container to the given marker list value.
public bool set_meta (string meta_item, Value? value)
Sets the value of the specified field of the meta container to a copy of the given value.
public bool set_string (string meta_item, string value)
Sets the value of the specified field of the meta container to the given string value.
public bool set_uint (string meta_item, uint value)
Sets the value of the specified field of the meta container to the given uint value.
public bool set_uint64 (string meta_item, uint64 value)
Sets the value of the specified field of the meta container to the given uint64 value.

Signals:

public signal void notify_meta (string key, Value? value)
This is emitted for a meta container whenever the metadata under one of its fields changes, is set for the first time, or is removed.

Inherited Members:

All known members inherited from class GLib.Object