Optionalproperties: Partial<GES.UriSourceAsset.ConstructorProps>Internal$signalsCompile-time signal type information.
This instance property is generated only for TypeScript type checking. It is not defined at runtime and should not be accessed in JS code.
Static$gtypeThe GES.Extractable object type that can be extracted from the asset.
The GES.Extractable object type that can be extracted from the asset.
The ID of the asset. This should be unique amongst all assets with the same GES.Asset.extractable_type. Depending on the associated GES.Extractable implementation, this id may convey some information about the GObject.Object that should be extracted. Note that, as such, the ID will have an expected format, and you can not choose this value arbitrarily. By default, this will be set to the type name of the GES.Asset.extractable_type, but you should check the documentation of the extractable type to see whether they differ from the default behaviour.
The default proxy for this asset, or null if it has no proxy. A
proxy will act as a substitute for the original asset when the
original is requested (see ges_asset_request()).
Setting this property will not usually remove the existing proxy, but
will replace it as the default (see ges_asset_set_proxy()).
The asset that this asset is a proxy for, or null if it is not a
proxy for another asset.
Note that even if this asset is acting as a proxy for another asset,
but this asset is not the default GES.Asset.proxy, then proxy-target
will still point to this other asset. So you should check the
GES.Asset.proxy property of target-proxy before assuming it is the
current default proxy for the target.
Note that the GObject.Object::notify for this property is emitted after the GES.Asset.proxy GObject.Object::notify for the corresponding (if any) asset it is now the proxy of/no longer the proxy of.
The asset that this asset is a proxy for, or null if it is not a
proxy for another asset.
Note that even if this asset is acting as a proxy for another asset,
but this asset is not the default GES.Asset.proxy, then proxy-target
will still point to this other asset. So you should check the
GES.Asset.proxy property of target-proxy before assuming it is the
current default proxy for the target.
Note that the GObject.Object::notify for this property is emitted after the GES.Asset.proxy GObject.Object::notify for the corresponding (if any) asset it is now the proxy of/no longer the proxy of.
Creates a binding between source_property on source and target_property
on target.
Whenever the source_property is changed the target_property is
updated using the same value. For instance:
g_object_bind_property (action, "active", widget, "sensitive", 0);
Will result in the "sensitive" property of the widget GObject.Object instance to be updated with the same value of the "active" property of the action GObject.Object instance.
If flags contains GObject.BindingFlags.BIDIRECTIONAL then the binding will be mutual:
if target_property on target changes then the source_property on source
will be updated as well.
The binding will automatically be removed when either the source or the
target instances are finalized. To remove the binding without affecting the
source and the target you can just call g_object_unref() on the returned
GObject.Binding instance.
Removing the binding by calling g_object_unref() on it must only be done if
the binding, source and target are only used from a single thread and it
is clear that both source and target outlive the binding. Especially it
is not safe to rely on this if the binding, source or target can be
finalized from different threads. Keep another reference to the binding and
use g_binding_unbind() instead to be on the safe side.
A GObject.Object can have multiple bindings.
the property on source to bind
the target GObject.Object
the property on target to bind
flags to pass to GObject.Binding
the GObject.Binding instance representing the binding between the two GObject.Object instances. The binding is released whenever the GObject.Binding reference count reaches zero.
Complete version of g_object_bind_property().
Creates a binding between source_property on source and target_property
on target, allowing you to set the transformation functions to be used by
the binding.
If flags contains GObject.BindingFlags.BIDIRECTIONAL then the binding will be mutual:
if target_property on target changes then the source_property on source
will be updated as well. The transform_from function is only used in case
of bidirectional bindings, otherwise it will be ignored
The binding will automatically be removed when either the source or the
target instances are finalized. This will release the reference that is
being held on the GObject.Binding instance; if you want to hold on to the
GObject.Binding instance, you will need to hold a reference to it.
To remove the binding, call g_binding_unbind().
A GObject.Object can have multiple bindings.
The same user_data parameter will be used for both transform_to
and transform_from transformation functions; the notify function will
be called once, when the binding is removed. If you need different data
for each transformation function, please use
g_object_bind_property_with_closures() instead.
the property on source to bind
the target GObject.Object
the property on target to bind
flags to pass to GObject.Binding
Optionaltransform_to: BindingTransformFuncthe transformation function from the source to the target, or null to use the default
Optionaltransform_from: BindingTransformFuncthe transformation function from the target to the source, or null to use the default
Optionalnotify: DestroyNotifya function to call when disposing the binding, to free resources used by the transformation functions, or null if not required
the GObject.Binding instance representing the binding between the two GObject.Object instances. The binding is released whenever the GObject.Binding reference count reaches zero.
Creates a binding between source_property on source and target_property
on target, allowing you to set the transformation functions to be used by
the binding.
This function is the language bindings friendly version of
g_object_bind_property_full(), using GClosures instead of
function pointers.
the property on source to bind
the GObject.Binding instance representing the binding between the two GObject.Object instances. The binding is released whenever the GObject.Binding reference count reaches zero.
Blocks a handler of an instance so it will not be called during any signal emissions
Handler ID of the handler to be blocked
SignalconnectSignalconnect_Disconnects a handler from an instance so it will not be called during any future or currently ongoing emissions of the signal it has been connected to.
Handler ID of the handler to be disconnected
SignalemitThis function is intended for GObject.Object implementations to re-enforce
a [floating][floating-ref] object reference. Doing this is seldom
required: all GInitiallyUnowneds are created with a floating reference
which usually just needs to be sunken by calling g_object_ref_sink().
Increases the freeze count on object. If the freeze count is
non-zero, the emission of "notify" signals on object is
stopped. The signals are queued until the freeze count is decreased
to zero. Duplicate notifications are squashed so that at most one
GObject.Object::notify signal is emitted for each property modified while the
object is frozen.
This is necessary for accessors that modify multiple properties to prevent premature notification while the object is still being modified.
Gets a named field from the objects table of associations (see g_object_set_data()).
name of the key for that association
the data if found, or null if no such data exists.
Gets a property of an object.
The value can be:
In general, a copy is made of the property contents and the caller is responsible for freeing the memory by calling GObject.Value.unset.
Note that GObject.Object.get_property is really intended for language bindings, GObject.Object.get is much more convenient for C programming.
The name of the property to get
Return location for the property value. Can be an empty GObject.Value initialized by G_VALUE_INIT (auto-initialized with expected type since GLib 2.60), a GObject.Value initialized with the expected property type, or a GObject.Value initialized with a transformable type
This function gets back user data pointers stored via
g_object_set_qdata().
A GLib.Quark, naming the user data pointer
The user data pointer set, or null
Get the GstPbutils.DiscovererStreamInfo user by asset
Gets n_properties properties for an object.
Obtained properties will be set to values. All properties must be valid.
Warnings will be emitted and undefined behaviour may result if invalid
properties are passed in.
the names of each property to get
the values of each property to get
Starts asynchronous initialization of the object implementing the
interface. This must be done before any real use of the object after
initial construction. If the object also implements Gio.Initable you can
optionally call g_initable_init() instead.
This method is intended for language bindings. If writing in C,
g_async_initable_new_async() should typically be used instead.
When the initialization is finished, callback will be called. You can
then call g_async_initable_init_finish() to get the result of the
initialization.
Implementations may also support cancellation. If cancellable is not
null, then initialization can be cancelled by triggering the cancellable
object from another thread. If the operation was cancelled, the error
Gio.IOErrorEnum.CANCELLED will be returned. If cancellable is not null, and
the object doesn't support cancellable initialization, the error
Gio.IOErrorEnum.NOT_SUPPORTED will be returned.
As with Gio.Initable, if the object is not initialized, or initialization
returns with an error, then all operations on the object except
g_object_ref() and g_object_unref() are considered to be invalid, and
have undefined behaviour. They will often fail with g_critical() or
g_warning(), but this must not be relied on.
Callers should not assume that a class which implements Gio.AsyncInitable can
be initialized multiple times; for more information, see g_initable_init().
If a class explicitly supports being initialized multiple times,
implementation requires yielding all subsequent calls to init_async() on the
results of the first call.
For classes that also support the Gio.Initable interface, the default
implementation of this method will run the g_initable_init() function
in a thread, so if you want to support asynchronous initialization via
threads, just implement the Gio.AsyncInitable interface without overriding
any interface methods.
the I/O priority of the operation
Optionalcancellable: Gio.Cancellableoptional Gio.Cancellable object, null to ignore.
Starts asynchronous initialization of the object implementing the
interface. This must be done before any real use of the object after
initial construction. If the object also implements Gio.Initable you can
optionally call g_initable_init() instead.
This method is intended for language bindings. If writing in C,
g_async_initable_new_async() should typically be used instead.
When the initialization is finished, callback will be called. You can
then call g_async_initable_init_finish() to get the result of the
initialization.
Implementations may also support cancellation. If cancellable is not
null, then initialization can be cancelled by triggering the cancellable
object from another thread. If the operation was cancelled, the error
Gio.IOErrorEnum.CANCELLED will be returned. If cancellable is not null, and
the object doesn't support cancellable initialization, the error
Gio.IOErrorEnum.NOT_SUPPORTED will be returned.
As with Gio.Initable, if the object is not initialized, or initialization
returns with an error, then all operations on the object except
g_object_ref() and g_object_unref() are considered to be invalid, and
have undefined behaviour. They will often fail with g_critical() or
g_warning(), but this must not be relied on.
Callers should not assume that a class which implements Gio.AsyncInitable can
be initialized multiple times; for more information, see g_initable_init().
If a class explicitly supports being initialized multiple times,
implementation requires yielding all subsequent calls to init_async() on the
results of the first call.
For classes that also support the Gio.Initable interface, the default
implementation of this method will run the g_initable_init() function
in a thread, so if you want to support asynchronous initialization via
threads, just implement the Gio.AsyncInitable interface without overriding
any interface methods.
the I/O priority of the operation
optional Gio.Cancellable object, null to ignore.
a Gio.AsyncReadyCallback to call when the request is satisfied
Starts asynchronous initialization of the object implementing the
interface. This must be done before any real use of the object after
initial construction. If the object also implements Gio.Initable you can
optionally call g_initable_init() instead.
This method is intended for language bindings. If writing in C,
g_async_initable_new_async() should typically be used instead.
When the initialization is finished, callback will be called. You can
then call g_async_initable_init_finish() to get the result of the
initialization.
Implementations may also support cancellation. If cancellable is not
null, then initialization can be cancelled by triggering the cancellable
object from another thread. If the operation was cancelled, the error
Gio.IOErrorEnum.CANCELLED will be returned. If cancellable is not null, and
the object doesn't support cancellable initialization, the error
Gio.IOErrorEnum.NOT_SUPPORTED will be returned.
As with Gio.Initable, if the object is not initialized, or initialization
returns with an error, then all operations on the object except
g_object_ref() and g_object_unref() are considered to be invalid, and
have undefined behaviour. They will often fail with g_critical() or
g_warning(), but this must not be relied on.
Callers should not assume that a class which implements Gio.AsyncInitable can
be initialized multiple times; for more information, see g_initable_init().
If a class explicitly supports being initialized multiple times,
implementation requires yielding all subsequent calls to init_async() on the
results of the first call.
For classes that also support the Gio.Initable interface, the default
implementation of this method will run the g_initable_init() function
in a thread, so if you want to support asynchronous initialization via
threads, just implement the Gio.AsyncInitable interface without overriding
any interface methods.
the I/O priority of the operation
Optionalcancellable: Gio.Cancellableoptional Gio.Cancellable object, null to ignore.
Optionalcallback: AsyncReadyCallback<GES.UriSourceAsset>a Gio.AsyncReadyCallback to call when the request is satisfied
Finishes asynchronous initialization and returns the result.
See g_async_initable_init_async().
true if successful. If an error has occurred, this function will return false and set error appropriately if present.
Checks whether object has a [floating][floating-ref] reference.
true if object has a floating reference
Check if asset contains a single image
true if the video stream corresponds to an image (i.e. only contains one frame)
Finishes the async construction for the various g_async_initable_new
calls, returning the created object or null on error.
the Gio.AsyncResult from the callback
a newly created GObject.Object, or null on error. Free with g_object_unref().
Emits a "notify" signal for the property property_name on object.
When possible, eg. when signaling a property change from within the class
that registered the property, you should use g_object_notify_by_pspec()
instead.
Note that emission of the notify signal may be blocked with
g_object_freeze_notify(). In this case, the signal emissions are queued
and will be emitted (in reverse order) when g_object_thaw_notify() is
called.
the name of a property installed on the class of object.
Emits a "notify" signal for the property specified by pspec on object.
This function omits the property name lookup, hence it is faster than
g_object_notify().
One way to avoid using g_object_notify() from within the
class that registered the properties, and using g_object_notify_by_pspec()
instead, is to store the GParamSpec used with
g_object_class_install_property() inside a static array, e.g.:
typedef enum
{
PROP_FOO = 1,
PROP_LAST
} MyObjectProperty;
static GParamSpec *properties[PROP_LAST];
static void
my_object_class_init (MyObjectClass *klass)
{
properties[PROP_FOO] = g_param_spec_int ("foo", NULL, NULL,
0, 100,
50,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
g_object_class_install_property (gobject_class,
PROP_FOO,
properties[PROP_FOO]);
}
and then notify a change on the "foo" property with:
g_object_notify_by_pspec (self, properties[PROP_FOO]);
the GObject.ParamSpec of a property installed on the class of object.
Increases the reference count of object.
Since GLib 2.56, if GLIB_VERSION_MAX_ALLOWED is 2.56 or greater, the type
of object will be propagated to the return type (using the GCC typeof()
extension), so any casting the caller needs to do on the return type must be
explicit.
the same object
Increase the reference count of object, and possibly remove the
[floating][floating-ref] reference, if object has a floating reference.
In other words, if the object is floating, then this call "assumes ownership" of the floating reference, converting it to a normal reference by clearing the floating flag while leaving the reference count unchanged. If the object is not floating, then this call adds a new normal reference increasing the reference count by one.
Since GLib 2.56, the type of object will be propagated to the return type
under the same conditions as for g_object_ref().
object
Releases all references to other objects. This can be used to break reference cycles.
This function should only be called from object system implementations.
Sets multiple properties of an object at once. The properties argument should be a dictionary mapping property names to values.
Object containing the properties to set
Each object carries around a table of associations from strings to pointers. This function lets you set an association.
If the object already had an association with that name, the old association will be destroyed.
Internally, the key is converted to a GLib.Quark using g_quark_from_string().
This means a copy of key is kept permanently (even after object has been
finalized) — so it is recommended to only use a small, bounded set of values
for key in your program, to avoid the GLib.Quark storage growing unbounded.
name of the key
Optionaldata: anydata to associate with that key
Sets a property on an object.
The name of the property to set
The value to set the property to
Remove a specified datum from the object's data associations, without invoking the association's destroy handler.
name of the key
the data if found, or null if no such data exists.
This function gets back user data pointers stored via
g_object_set_qdata() and removes the data from object
without invoking its destroy() function (if any was
set).
Usually, calling this function is only required to update
user data pointers with a destroy notifier, for example:
void
object_add_to_user_list (GObject *object,
const gchar *new_string)
{
// the quark, naming the object data
GQuark quark_string_list = g_quark_from_static_string ("my-string-list");
// retrieve the old string list
GList *list = g_object_steal_qdata (object, quark_string_list);
// prepend new string
list = g_list_prepend (list, g_strdup (new_string));
// this changed 'list', so we need to set it again
g_object_set_qdata_full (object, quark_string_list, list, free_string_list);
}
static void
free_string_list (gpointer data)
{
GList *node, *list = data;
for (node = list; node; node = node->next)
g_free (node->data);
g_list_free (list);
}
Using g_object_get_qdata() in the above example, instead of
g_object_steal_qdata() would have left the destroy function set,
and thus the partial string list would have been freed upon
g_object_set_qdata_full().
A GLib.Quark, naming the user data pointer
The user data pointer set, or null
Stops a signal's emission by the given signal name. This will prevent the default handler and any subsequent signal handlers from being invoked.
Name of the signal to stop emission of
Reverts the effect of a previous call to
g_object_freeze_notify(). The freeze count is decreased on object
and when it reaches zero, queued "notify" signals are emitted.
Duplicate notifications for each property are squashed so that at most one GObject.Object::notify signal is emitted for each property, in the reverse order in which they have been queued.
It is an error to call this function when the freeze count is zero.
Unblocks a handler so it will be called again during any signal emissions
Handler ID of the handler to be unblocked
Decreases the reference count of object. When its reference count
drops to 0, the object is finalized (i.e. its memory is freed).
If the pointer to the GObject.Object may be reused in future (for example, if it is
an instance variable of another object), it is recommended to clear the
pointer to null rather than retain a dangling pointer to a potentially
invalid GObject.Object instance. Use g_clear_object() for this.
Virtualvfunc_the constructed function is called by g_object_new() as the
final step of the object creation process. At the point of the call, all
construction properties have been set on the object. The purpose of this
call is to allow for object initialisation steps that can only be performed
after construction properties have been set. constructed implementors
should chain up to the constructed call of their parent class to allow it
to complete its initialisation.
Virtualvfunc_Virtualvfunc_the dispose function is supposed to drop all references to other
objects, but keep the instance otherwise intact, so that client method
invocations still work. It may be run multiple times (due to reference
loops). Before returning, dispose should chain up to the dispose method
of the parent class.
Virtualvfunc_instance finalization function, should finish the finalization of
the instance begun in dispose and chain up to the finalize method of the
parent class.
Virtualvfunc_Virtualvfunc_Starts asynchronous initialization of the object implementing the
interface. This must be done before any real use of the object after
initial construction. If the object also implements Gio.Initable you can
optionally call g_initable_init() instead.
This method is intended for language bindings. If writing in C,
g_async_initable_new_async() should typically be used instead.
When the initialization is finished, callback will be called. You can
then call g_async_initable_init_finish() to get the result of the
initialization.
Implementations may also support cancellation. If cancellable is not
null, then initialization can be cancelled by triggering the cancellable
object from another thread. If the operation was cancelled, the error
Gio.IOErrorEnum.CANCELLED will be returned. If cancellable is not null, and
the object doesn't support cancellable initialization, the error
Gio.IOErrorEnum.NOT_SUPPORTED will be returned.
As with Gio.Initable, if the object is not initialized, or initialization
returns with an error, then all operations on the object except
g_object_ref() and g_object_unref() are considered to be invalid, and
have undefined behaviour. They will often fail with g_critical() or
g_warning(), but this must not be relied on.
Callers should not assume that a class which implements Gio.AsyncInitable can
be initialized multiple times; for more information, see g_initable_init().
If a class explicitly supports being initialized multiple times,
implementation requires yielding all subsequent calls to init_async() on the
results of the first call.
For classes that also support the Gio.Initable interface, the default
implementation of this method will run the g_initable_init() function
in a thread, so if you want to support asynchronous initialization via
threads, just implement the Gio.AsyncInitable interface without overriding
any interface methods.
the I/O priority of the operation
Optionalcancellable: Gio.Cancellableoptional Gio.Cancellable object, null to ignore.
Optionalcallback: AsyncReadyCallback<GES.UriSourceAsset>a Gio.AsyncReadyCallback to call when the request is satisfied
Virtualvfunc_Finishes asynchronous initialization and returns the result.
See g_async_initable_init_async().
Virtualvfunc_Emits a "notify" signal for the property property_name on object.
When possible, eg. when signaling a property change from within the class
that registered the property, you should use g_object_notify_by_pspec()
instead.
Note that emission of the notify signal may be blocked with
g_object_freeze_notify(). In this case, the signal emissions are queued
and will be emitted (in reverse order) when g_object_thaw_notify() is
called.
Virtualvfunc_the generic setter for all properties of this type. Should be
overridden for every type with properties. If implementations of
set_property don't emit property change notification explicitly, this will
be done implicitly by the type system. However, if the notify signal is
emitted explicitly, the type system will not emit it a second time.
This function essentially limits the life time of the closure to
the life time of the object. That is, when the object is finalized,
the closure is invalidated by calling g_closure_invalidate() on
it, in order to prevent invocations of the closure with a finalized
(nonexisting) object. Also, g_object_ref() and g_object_unref() are
added as marshal guards to the closure, to ensure that an extra
reference count is held on object during invocation of the
closure. Usually, this function will be called on closures that
use this object as closure data.
GObject.Closure to watch
Deserializes the given string, and adds and sets the found fields and
their values on the container. The string should be the return of
ges_meta_container_metas_to_string().
A string to deserialize and add to container
true if the fields in str was successfully deserialized and added to container.
Checks whether the specified field has been registered as static, and
gets the registered type and flags of the field, as used in
ges_meta_container_register_meta() and
ges_meta_container_register_static_meta().
The key for the container field to check
true if the meta_item field has been registered on container.
Extracts a new GES.Asset.extractable_type object from the asset. The GES.Asset.id of the asset may determine the properties and state of the newly created object.
A newly created object, or null if an error occurred.
Calls the given function on each of the meta container's set metadata fields.
A function to call on each of container's set metadata fields
Gets the current boolean value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail.
The key for the container field to get
true if the boolean value under meta_item was copied to dest.
Gets the current date value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail.
The key for the container field to get
true if the date value under meta_item was copied to dest.
Gets the current date time value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail.
The key for the container field to get
true if the date time value under meta_item was copied to dest.
Gets the current double value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail.
The key for the container field to get
true if the double value under meta_item was copied to dest.
Gets the current float value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail.
The key for the container field to get
true if the float value under meta_item was copied to dest.
Gets the current int value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail.
The key for the container field to get
true if the int value under meta_item was copied to dest.
Gets the current int64 value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail.
The key for the container field to get
true if the int64 value under meta_item was copied to dest.
Gets the current marker list value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail.
The key for the container field to get
A copy of the marker list value under key, or null if it could not be fetched.
Result: true if self has a natural framerate false otherwise
Gets the GES.Asset.proxy_target of the asset.
Note that the proxy target may have loaded with an error, so you should
call ges_asset_get_error() on the returned target.
The asset that proxy is a proxy of.
Gets the current string value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail.
The key for the container field to get
The string value under meta_item, or null if it could not be fetched.
Get the GESAssetTrackType the GES.TrackElement extracted from self
should get into
Gets the current uint value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail.
The key for the container field to get
true if the uint value under meta_item was copied to dest.
Gets the current uint64 value of the specified field of the meta container. If the field does not have a set value, or it is of the wrong type, the method will fail.
The key for the container field to get
true if the uint64 value under meta_item was copied to dest.
Initializes the object implementing the interface.
This method is intended for language bindings. If writing in C,
g_initable_new() should typically be used instead.
The object must be initialized before any real use after initial
construction, either with this function or g_async_initable_init_async().
Implementations may also support cancellation. If cancellable is not null,
then initialization can be cancelled by triggering the cancellable object
from another thread. If the operation was cancelled, the error
Gio.IOErrorEnum.CANCELLED will be returned. If cancellable is not null and
the object doesn't support cancellable initialization the error
Gio.IOErrorEnum.NOT_SUPPORTED will be returned.
If the object is not initialized, or initialization returns with an
error, then all operations on the object except g_object_ref() and
g_object_unref() are considered to be invalid, and have undefined
behaviour. See the [description][iface@Gio.Initable#description] for more details.
Callers should not assume that a class which implements Gio.Initable can be
initialized multiple times, unless the class explicitly documents itself as
supporting this. Generally, a class’ implementation of init() can assume
(and assert) that it will only be called once. Previously, this documentation
recommended all Gio.Initable implementations should be idempotent; that
recommendation was relaxed in GLib 2.54.
If a class explicitly supports being initialized multiple times, it is recommended that the method is idempotent: multiple calls with the same arguments should return the same results. Only the first call initializes the object; further calls return the result of the first call.
One reason why a class might need to support idempotent initialization is if
it is designed to be used via the singleton pattern, with a
GObject.ObjectClass.constructor that sometimes returns an existing instance.
In this pattern, a caller would expect to be able to call g_initable_init()
on the result of g_object_new(), regardless of whether it is in fact a new
instance.
Optionalcancellable: Gio.Cancellableoptional Gio.Cancellable object, null to ignore.
true if successful. If an error has occurred, this function will return false and set error appropriately if present.
Get all the proxies that the asset has. The first item of the list will be the default GES.Asset.proxy. The second will be the proxy that is 'next in line' to be default, and so on.
The list of proxies that asset has.
Serializes the set metadata fields of the meta container to a string.
A serialized container.
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. After calling this, only values of the same type as value
can be set for this field. The given flags can be set to make this
field only readable after calling this method.
true if the meta_item field was successfully registered on container to only hold value types, with the given flags, and the field was successfully set to 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. After calling this, only boolean values can be set for this field. The given flags can be set to make this field only readable after calling this method.
true if the meta_item field was successfully registered on container to only hold boolean typed values, with the given flags, and the field was successfully set to 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. After calling this, only date values can be set for this field. The given flags can be set to make this field only readable after calling this method.
true if the meta_item field was successfully registered on container to only hold date typed values, with the given flags, and the field was successfully set to 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. After calling this, only date time values can be set for this field. The given flags can be set to make this field only readable after calling this method.
true if the meta_item field was successfully registered on container to only hold date time typed values, with the given flags, and the field was successfully set to 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. After calling this, only double values can be set for this field. The given flags can be set to make this field only readable after calling this method.
true if the meta_item field was successfully registered on container to only hold double typed values, with the given flags, and the field was successfully set to 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. After calling this, only float values can be set for this field. The given flags can be set to make this field only readable after calling this method.
true if the meta_item field was successfully registered on container to only hold float typed values, with the given flags, and the field was successfully set to 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. After calling this, only int values can be set for this field. The given flags can be set to make this field only readable after calling this method.
true if the meta_item field was successfully registered on container to only hold int typed values, with the given flags, and the field was successfully set to 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. After calling this, only int64 values can be set for this field. The given flags can be set to make this field only readable after calling this method.
true if the meta_item field was successfully registered on container to only hold int64 typed values, with the given flags, and the field was successfully set to 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. After calling this, only string values can be set for this field. The given flags can be set to make this field only readable after calling this method.
true if the meta_item field was successfully registered on container to only hold string typed values, with the given flags, and the field was successfully set to 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. After calling this, only uint values can be set for this field. The given flags can be set to make this field only readable after calling this method.
true if the meta_item field was successfully registered on container to only hold uint typed values, with the given flags, and the field was successfully set to 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. After calling this, only uint64 values can be set for this field. The given flags can be set to make this field only readable after calling this method.
true if the meta_item field was successfully registered on container to only hold uint64 typed values, with the given flags, and the field was successfully set to value.
Registers a static metadata field on the container to only hold the specified type. After calling this, setting a value under this field can only succeed if its type matches the registered type of the field.
Unlike ges_meta_container_register_meta(), no (initial) value is set
for this field, which means you can use this method to reserve the
space to be optionally set later.
Note that if a value has already been set for the field being
registered, then its type must match the registering type, and its
value will be left in place. If the field has no set value, then
you will likely want to include #GES_META_WRITABLE in flags to allow
the value to be set later.
true if the meta_item field was successfully registered on container to only hold type values, with the given flags.
Sets the value of the specified field of the meta container to the given boolean value.
The key for the container field to set
The value to set under meta_item
true if value was set under meta_item for container.
Sets the value of the specified field of the meta container to the given double value.
The key for the container field to set
The value to set under meta_item
true if value was set under meta_item for container.
Sets the value of the specified field of the meta container to the given float value.
The key for the container field to set
The value to set under meta_item
true if value was set under meta_item for container.
Sets the value of the specified field of the meta container to the given int value.
The key for the container field to set
The value to set under meta_item
true if value was set under meta_item for container.
Sets the value of the specified field of the meta container to the given int64 value.
The key for the container field to set
The value to set under meta_item
true if value was set under meta_item for container.
Sets the value of the specified field of the meta container to the given marker list value.
The key for the container field to set
The value to set under meta_item
true if value was set under meta_item for container.
Sets the value of the specified field of the meta container to a
copy of the given value. If the given value is null, the field
given by meta_item is removed and true is returned.
true if value was set under meta_item for container.
Sets the GES.Asset.proxy for the asset.
If proxy is among the existing proxies of the asset (see
ges_asset_list_proxies()) it will be moved to become the default
proxy. Otherwise, if proxy is not null, it will be added to the list
of proxies, as the new default. The previous default proxy will become
'next in line' for if the new one is removed, and so on. As such, this
will not actually remove the previous default proxy (use
ges_asset_unproxy() for that).
Note that an asset can only act as a proxy for one other asset.
As a special case, if proxy is null, then this method will actually
remove all proxies from the asset.
true if proxy was successfully set as the default for asset.
Sets the value of the specified field of the meta container to the given string value.
The key for the container field to set
The value to set under meta_item
true if value was set under meta_item for container.
Set the GES.TrackType the GES.TrackElement extracted from self
should get into
Sets the value of the specified field of the meta container to the given uint value.
The key for the container field to set
The value to set under meta_item
true if value was set under meta_item for container.
Sets the value of the specified field of the meta container to the given uint64 value.
The key for the container field to set
The value to set under meta_item
true if value was set under meta_item for container.
Removes the proxy from the available list of proxies for the asset. If
the given proxy is the default proxy of the list, then the next proxy
in the available list (see ges_asset_list_proxies()) will become the
default. If there are no other proxies, then the asset will no longer
have a default GES.Asset.proxy.
true if proxy was successfully removed from asset's proxy list.
Virtualvfunc_Extracts a new GES.Asset.extractable_type object from the asset. The GES.Asset.id of the asset may determine the properties and state of the newly created object.
Virtualvfunc_Result: true if self has a natural framerate false otherwise
Virtualvfunc_Virtualvfunc_Initializes the object implementing the interface.
This method is intended for language bindings. If writing in C,
g_initable_new() should typically be used instead.
The object must be initialized before any real use after initial
construction, either with this function or g_async_initable_init_async().
Implementations may also support cancellation. If cancellable is not null,
then initialization can be cancelled by triggering the cancellable object
from another thread. If the operation was cancelled, the error
Gio.IOErrorEnum.CANCELLED will be returned. If cancellable is not null and
the object doesn't support cancellable initialization the error
Gio.IOErrorEnum.NOT_SUPPORTED will be returned.
If the object is not initialized, or initialization returns with an
error, then all operations on the object except g_object_ref() and
g_object_unref() are considered to be invalid, and have undefined
behaviour. See the [description][iface@Gio.Initable#description] for more details.
Callers should not assume that a class which implements Gio.Initable can be
initialized multiple times, unless the class explicitly documents itself as
supporting this. Generally, a class’ implementation of init() can assume
(and assert) that it will only be called once. Previously, this documentation
recommended all Gio.Initable implementations should be idempotent; that
recommendation was relaxed in GLib 2.54.
If a class explicitly supports being initialized multiple times, it is recommended that the method is idempotent: multiple calls with the same arguments should return the same results. Only the first call initializes the object; further calls return the result of the first call.
One reason why a class might need to support idempotent initialization is if
it is designed to be used via the singleton pattern, with a
GObject.ObjectClass.constructor that sometimes returns an existing instance.
In this pattern, a caller would expect to be able to call g_initable_init()
on the result of g_object_new(), regardless of whether it is in fact a new
instance.
Optionalcancellable: Gio.Cancellableoptional Gio.Cancellable object, null to ignore.
Virtualvfunc_Virtualvfunc_A method called by a GES.Project when an asset has
failed to load. error is the error given by
ges_asset_request_finish (). Returns: true if a new id for self was
passed to proposed_new_id.
Virtualvfunc_A method to be called when an asset is being requested asynchronously. This will be after the properties of the asset have been set, so it is tasked with (re)loading the 'state' of the asset. The return value should indicated whether the loading is complete, is carrying on asynchronously, or an error occurred. The default implementation will simply return that loading is already complete (the asset is already in a usable state after the properties have been set).
Static_Staticcompat_Optionaldata: anyStaticfind_Staticinstall_Staticinstall_the id for the new property
the GObject.ParamSpec for the new property
Staticinterface_Find the GObject.ParamSpec with the given name for an
interface. Generally, the interface vtable passed in as g_iface
will be the default vtable from g_type_default_interface_ref(), or,
if you know the interface has already been loaded,
g_type_default_interface_peek().
any interface vtable for the interface, or the default vtable for the interface
name of a property to look up.
Staticinterface_Add a property to an interface; this is only useful for interfaces
that are added to GObject-derived types. Adding a property to an
interface forces all objects classes with that interface to have a
compatible property. The compatible property could be a newly
created GObject.ParamSpec, but normally
g_object_class_override_property() will be used so that the object
class only needs to provide an implementation and inherits the
property description, default value, bounds, and so forth from the
interface property.
This function is meant to be called from the interface's default
vtable initialization function (the class_init member of
GObject.TypeInfo.) It must not be called after after class_init has
been called for any object types implementing this interface.
If pspec is a floating reference, it will be consumed.
any interface vtable for the interface, or the default vtable for the interface.
the GObject.ParamSpec for the new property
Staticinterface_Lists the properties of an interface.Generally, the interface
vtable passed in as g_iface will be the default vtable from
g_type_default_interface_ref(), or, if you know the interface has
already been loaded, g_type_default_interface_peek().
any interface vtable for the interface, or the default vtable for the interface
Staticlist_Staticneeds_Indicate that an existing GES.Asset in the cache should be reloaded upon the next request. This can be used when some condition has changed, which may require that an existing asset should be updated. For example, if an external resource has changed or now become available.
Note, the asset is not immediately changed, but will only actually
reload on the next call to ges_asset_request() or
ges_asset_request_async().
The GES.Asset.extractable_type of the asset that needs reloading
Optionalid: stringThe GES.Asset.id of the asset asset that needs reloading
StaticnewvStaticoverride_the new property ID
the name of a property registered in a parent class or in an interface of this class.
StaticrequestReturns an asset with the given properties. If such an asset already exists in the cache (it has been previously created in GES), then a reference to the existing asset is returned. Otherwise, a newly created asset is returned, and also added to the cache.
If the requested asset has been loaded with an error, then error is
set, if given, and null will be returned instead.
Note that the given id may not be exactly the GES.Asset.id that is
set on the returned asset. For instance, it may be adjusted into a
standard format. Or, if a GES.Extractable type does not have its
extraction parametrised, as is the case by default, then the given id
may be ignored entirely and the GES.Asset.id set to some standard, in
which case a null id can be given.
Similarly, the given extractable_type may not be exactly the
GES.Asset.extractable_type that is set on the returned asset. Instead,
the actual extractable type may correspond to a subclass of the given
extractable_type, depending on the given id.
Moreover, depending on the given extractable_type, the returned asset
may belong to a subclass of GES.Asset.
Finally, if the requested asset has a GES.Asset.proxy, then the proxy that is found at the end of the chain of proxies is returned (a proxy's proxy will take its place, and so on, unless it has no proxy).
Some asset subclasses only support asynchronous construction of its
assets, such as GES.UriClip. For such assets this method will fail, and
you should use ges_asset_request_async() instead. In the case of
GES.UriClip, you can use ges_uri_clip_asset_request_sync() if you only
want to wait for the request to finish.
The GES.Asset.extractable_type of the asset
Optionalid: stringThe GES.Asset.id of the asset
Staticrequest_Requests an asset with the given properties asynchronously (see
ges_asset_request()). When the asset has been initialized or fetched
from the cache, the given callback function will be called. The
asset can then be retrieved in the callback using the
ges_asset_request_finish() method on the given Gio.AsyncResult.
Note that the source object passed to the callback will be the
GES.Asset corresponding to the request, but it may not have loaded
correctly and therefore can not be used as is. Instead,
ges_asset_request_finish() should be used to fetch a usable asset, or
indicate that an error occurred in the asset's creation.
Note that the callback will be called in the GLib.MainLoop running under
the same GLib.MainContext that ges_init() was called in. So, if you wish
the callback to be invoked outside the default GLib.MainContext, you can
call g_main_context_push_thread_default() in a new thread before
calling ges_init().
Example of an asynchronous asset request:
// The request callback
static void
asset_loaded_cb (GESAsset * source, GAsyncResult * res, gpointer user_data)
{
GESAsset *asset;
GError *error = NULL;
asset = ges_asset_request_finish (res, &error);
if (asset) {
gst_print ("The file: %s is usable as a GESUriClip",
ges_asset_get_id (asset));
} else {
gst_print ("The file: %s is *not* usable as a GESUriClip because: %s",
ges_asset_get_id (source), error->message);
}
gst_object_unref (asset);
}
// The request:
ges_asset_request_async (GES_TYPE_URI_CLIP, some_uri, NULL,
(GAsyncReadyCallback) asset_loaded_cb, user_data);
The GES.Asset.extractable_type of the asset
Optionalid: stringThe GES.Asset.id of the asset
Optionalcancellable: Gio.CancellableAn object to allow cancellation of the asset request, or null to ignore
Optionalcallback: AsyncReadyCallback<GES.Asset>A function to call when the initialization is finished
Staticrequest_Fetches an asset requested by ges_asset_request_async(), which
finalises the request.
The task result to fetch the asset from
Asset to create a stream specific GES.Source for a media file.
NOTE: You should never request such a GES.Asset as they will be created automatically by GES.UriClipAsset-s.