Adds a new artist to media.
an audio's artist
Adds a new author to media.
an author for media
Appends a new binary value for key in data.
key to append
the buffer containing the new value
size of buffer
Appends a new boxed value for key in data.
key to append
the new value
Adds the director of the media
director of the movie
Adds a new external player to media.
an external player for media
Adds a new external url to media.
an external url for media
Appends a new float value for key in data.
key to append
the new value
Appends the value associated with key_name to data. This key_name is used to create
a new #GParamSpec instance, which is further used to create and register a key using
grl_registry_register_metadata_key().
A property key_name consists of segments consisting of ASCII letters and digits, separated by either the '-' or '_' character. The first character of a property key_name must be a letter. Key_names which violate these rules lead to undefined behaviour.
name of the key to change or add
the new value
Adds a new genre to media.
an audio's genre
Appends a new int value for key in data.
key to append
the new value
Appends a new int64 value for key in data.
key to append
the new value
Adds the keyword describing the media.
a keyword describing the media
Adds a new lyrics to media.
an audio's lyrics
Adds a new MusicBrainz artist id to media.
a MusicBrainz artist identifier
Adds the actor performing in the movie.
an actor performing in the movie
Adds the producer of the media.
producer of the movie
Adds a new set of values into data.
All keys in prop must be related among them.
data will take the ownership of relkeys, so do not modify it.
a set of related properties with their values
Appends a new string value for key in data.
key to append
the new value
Adds a new thumbnail to media.
a thumbnail for media
Adds a new thumbnail to media.
a buffer containing the thumbnail for media
size of buffer
Sets all the keys related with the URL of a media resource and adds it to
media (useful for resources with more than one URL).
a media's URL
th url mime type
the url bitrate, or -1 to ignore
media framerate, or -1 to ignore
media width, or -1 to ignore
media height, or -1 to ignore
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 instance to be updated with the same value of the "active" property of the action #GObject instance.
If flags contains %G_BINDING_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
#GBinding 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 can have multiple bindings.
the property on source to bind
the target #GObject
the property on target to bind
flags to pass to #GBinding
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 target #GObject
the property on target to bind
flags to pass to #GBinding
a #GClosure wrapping the transformation function from the source to the target, or %NULL to use the default
a #GClosure wrapping the transformation function from the target to the source, or %NULL to use the default
This function is intended for #GObject 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::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.
Get the first value from data associated with key.
key to look up.
Returns the first binary value associated with key from data. If key has
no first value, or value is not a gfloat, or key is not in data, then %NULL
is returned.
key to use
Returns the first boxed value associated with key from data. If key has
no first value, that value is not of a boxed type, or key is not in data,
then %NULL is returned.
key to use
Returns the media's first age certificate. This should usually be the media's most relevant age certificate. Use grl_media_get_region_data_nth() to get other age certificates.
Number of children of this container.
Gets a named field from the objects table of associations (see g_object_set_data()).
name of the key for that association
Returns the first float value associated with key from data. If key has no
first value, or value is not a gfloat, or key is not in data, then 0 is
returned.
key to use
Returns the first int value associated with key from data. If key has no
first value, or value is not a gint, or key is not in data, then 0 is
returned.
key to use
Returns the first int64 value associated with key from data. If key has no
first value, or value is not a gint, or key is not in data, then 0 is
returned.
key to use
Returns a list with keys contained in data.
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 g_value_unset().
Note that g_object_get_property() is really intended for language bindings, g_object_get() is much more convenient for C programming.
the name of the property to get
return location for the property value
This function gets back user data pointers stored via g_object_set_qdata().
A #GQuark, naming the user data pointer
Returns a set containing the values for key and related keys at position
index from data.
If user changes any of the values in the related keys, the changes will become permanent.
a metadata key
element to retrieve, starting at 0
Returns all non-%NULL values for key from data. This ignores related keys.
a metadata key
Returns all non-%NULL values for key from data. key must have been
registered as a string-type key. This ignores related keys.
a metadata key
Returns the first string value associated with key from data. If key has
no first value, or value is not string, or key is not in data, then %NULL
is returned.
key to use
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
Checks if key is in data.
key to search
Check if media is an audio
Check if media is a container
Checks whether object has a [floating][floating-ref] reference.
Check if media is an image
Check if media is a video
Returns how many values key or related keys have in data: if key has no
value, but a related key has, then it is counted as positive.
As example, let's think in three related keys, K1, K2 and K3, and then thinks we have added several values for those keys, as:
(V10, V20, V30), (V11, NULL, V31), (V12, NULL, V32)
Therefore, when invoking grl_data_length (data, K2) it will return 3: considering K2 and the related keys (K1 and K3), there are 3 values.
a metadata key
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.:
enum
{
PROP_0,
PROP_FOO,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
static void
my_object_class_init (MyObjectClass *klass)
{
properties[PROP_FOO] = g_param_spec_int ("foo", "Foo", "The foo",
0, 100,
50,
G_PARAM_READWRITE);
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 #GParamSpec of a property installed on the class of 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().
Removes the first value for key from data. If there are other keys related
to key their values will also be removed from data.
key to remove
Removes the value at position index for key from data. If there are other
keys related to key, their values at position index will also be removed
from data.
a metadata key
index of key to be removed, starting at 0
Releases all references to other objects. This can be used to break reference cycles.
This function should only be called from object system implementations.
Serializes a GrlMedia into a string. It does a basic serialization.
See grl_media_serialize_extended() to get more serialization approaches.
Sets the first value associated with key in data. If key already has a
value old value is freed and the new one is set.
Also, checks that value is compliant with key specification, modifying it
accordingly. For instance, if key requires a number between 0 and 10, but
value is outside this range, it will be adapted accordingly.
key to change or add
the new value
Set the album of the media
the audio's album
Set the main artist of the album of the media
the audio's album main artist
Set the disc number of the media for multi-disc album sets.
the disc number within an album
Set the artist of the media
the audio's artist
Set the media's author
the media's author
Sets the first binary value associated with key in data. If key already
has a first value old value is replaced by the new one.
key to change or add
buffer holding the data
size of the buffer
Set the bitrate of the media
the audio's bitrate
Sets the first boolean value associated with key in data. If key already
has a first value, old value is replaced by the new one.
key to change or add
the new value
Sets the first boxed value associated with key in data. If key already
has a value, the old value is freed and the new one is set.
key to change or add
the new value
Set the camera_model of the media
model of camera used to take picture
Set the media's first age certification. This should usually be the media's most relevant age certificate. Use grl_media_set_region_data() to set other age certificates.
The age certificate of the media
Sets the number of children of this container. Use #GRL_METADATA_KEY_CHILDCOUNT_UNKNOWN if it is unknown.
number of children
Set the composer of the media
the audio's composer
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 #GQuark 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 #GQuark storage growing unbounded.
name of the key
data to associate with that key
Set the media's description
the description
Sets the director of the media.
director of the movie
Set the media's duration
the duration in seconds
Sets the episode number of the media
the video's episode
Sets the title of an media
the title of the episode
Set the exposure_time of the media
picture's exposure time
Set the location of a player for the media (usually a flash player)
location of an external player for this media
Set an external location where users can play the media
external location where this media can be played.
Set if the media is favourite or not
whether the item is favourite or not
Set the flash_used of the media See http://library.gnome.org/devel/ontology/unstable/nmm-classes.html#nmm-Flash
whether the flash was used
Sets the first float value associated with key in data. If key already has
a first value old value is replaced by the new one.
key to change or add
the new value
Sets the first value associated with key_name in data. This key_name is used to create
a new #GParamSpec instance, which is further used to create and register a key using
grl_registry_register_metadata_key(). If key_name already has a first value, old
value is replaced by the new one.
A property key_name consists of segments consisting of ASCII letters and digits, separated by either the '-' or '_' character. The first character of a property key_name must be a letter. Key_names which violate these rules lead to undefined behaviour.
name of the key to change or add
the new value
Set the framerate of the media
the video's framerate
Set the genre of the media
the audio's genre
Set the height of the media
the video's height
Set the media identifier
the identifier of the media
Sets the first int value associated with key in data. If key already has a
first value old value is replaced by the new one.
key to change or add
the new value
Sets the first int64 value associated with key in data. If key already has a
first value old value is replaced by the new one.
key to change or add
the new value
Set the iso_speed of the media
picture's iso speed
Sets the keyword describing the media.
a keyword describing the media
Set the media last played position
second at which the media playback was interrupted
Set the media license
The license of the media
Set the lyrics of the media
the audio's lyrics
Set the MusicBrainz album identifier of the media
the MusicBrainz album identifier
Set the MusicBrainz artist identifier of the media
the MusicBrainz artist identifier
Set the MusicBrainz recording identifier of the media
the MusicBrainz recording identifier
Set the MusicBrainz Release Group identifier of the media
Album group release identifier in MusicBrainz
Set the MusicBrainz release identifier of the media
Album release identifier in MusicBrainz
Set the MusicBrainz track identifier of the media
the MusicBrainz track identifier
Set the media's mime-type
the mime type
Set the orientation of the media
degrees clockwise orientation of the picture
Sets the original, untranslated title of the media.
original, untranslated title of the movie
Sets the actor performing in the movie.
an actor performing in the movie
Set the media play count
the play count
Sets the producer of the media.
producer of the movie
Sets a property on an object.
the name of the property to set
the value
This method receives a rating and its scale and normalizes it on a scale from 0...5 to match the usual five-star rating.
a rating value
maximum rating value
Sets the region where media was published.
the region's ISO-3166-1 code
Updates the values at position index in data with values in relkeys.
data will take ownership of relkeys, so do not free it after invoking this
function.
a set of related keys
position to be updated, starting at 0
Sets the season number of the media
the video's season
Sets the show title of the media
the video's show name
Set the media's site. A site is a website about the media such as a studio's promotional website for a movie.
the site
Set the size of the media
the size in bytes
Set the media's source
the source
Sets the first string value associated with key in data. If key already
has a value old value is freed and the new one is set.
key to change or add
the new value
Set the media studio
The studio the media is from
Set the media's thumbnail URL
the thumbnail URL
Set the media's binary thumbnail
thumbnail buffer
thumbnail buffer size
Set the media's title
the title
Set the track number of the media
the audio's track number
Set the media's URL
the media's URL
Sets all the keys related with the URL of a media resource in one go.
the media's URL
the url mime type
the url bitrate, or -1 to ignore
media framerate, or -1 to ignore
media width, or -1 to ignore
media height, or -1 to ignore
Set the width of the media
the video's width
Remove a specified datum from the object's data associations, without invoking the association's destroy handler.
name of the key
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 #GQuark, naming the user data pointer
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::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.
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 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 instance. Use g_clear_object() for this.
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.
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.
#GClosure to watch
Find the #GParamSpec 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.
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 #GParamSpec, 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
#GTypeInfo.) 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 #GParamSpec for the new property
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
Creates a new instance of a #GObject subtype and sets its properties.
Construction parameters (see %G_PARAM_CONSTRUCT, %G_PARAM_CONSTRUCT_ONLY) which are not explicitly specified are set to their default values.
the type id of the #GObject subtype to instantiate
an array of #GParameter
Creates a new data media object.