Whether the created media should send and receive RTCP
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
Construct the media object and create its streams. Implementations should create the needed gstreamer elements and add them to the result object. No state changes should be performed on them yet.
One or more GstRTSPStream objects should be created from the result with gst_rtsp_media_create_stream ().
After the media is constructed, it can be configured and then prepared with gst_rtsp_media_prepare ().
the url used
Construct and return a #GstElement that is a #GstBin containing the elements to use for streaming the media.
The bin should contain payloaders pay%d for each stream. The default implementation of this function returns the bin created from the launch parameter.
the url used
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 #GstRTSPAddressPool used as the address pool of factory.
Get the configured/supported bandwidth of the ONVIF backchannel pipeline in bits per second.
Get the gst_parse_launch() pipeline description that will be used in the default prepare vmethod for generating the ONVIF backchannel pipeline.
Get the kernel UDP buffer size.
Gets a named field from the objects table of associations (see g_object_set_data()).
name of the key for that association
Get the configured media DSCP QoS.
Get the latency that is used for receiving media
Get the gst_parse_launch() pipeline description that will be used in the default prepare vmethod.
Get the the maximum time-to-live value of outgoing multicast packets.
Return the GType of the GstRTSPMedia subclass this factory will create.
Get the multicast interface used for factory.
Get the permissions object from factory.
Get the allowed profiles of factory.
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
Get the allowed protocols of factory.
Gets if and how the media clock should be published according to RFC7273.
This function gets back user data pointers stored via g_object_set_qdata().
A #GQuark, naming the user data pointer
Get the time that is stored for retransmission purposes
Get how media created from this factory will be suspended.
Get if media created from this factory can be used for PLAY or RECORD methods.
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
Returns %TRUE if an ONVIF backchannel is supported by the media factory.
Check if multicast sockets are configured to be bound to multicast addresses.
Check if created media will send and receive RTCP
Get if media created from this factory will have an EOS event sent to the pipeline before shutdown.
Checks whether object has a [floating][floating-ref] reference.
Get if media created from this factory can be shared between clients.
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().
Releases all references to other objects. This can be used to break reference cycles.
This function should only be called from object system implementations.
configure pool to be used as the address pool of factory.
a #GstRTSPAddressPool
Set the configured/supported bandwidth of the ONVIF backchannel pipeline in bits per second.
the bandwidth in bits per second
The gst_parse_launch() line to use for constructing the ONVIF backchannel pipeline in the default prepare vmethod if requested by the client.
The pipeline description should return a GstBin as the toplevel element which can be accomplished by enclosing the description with brackets '(' ')'.
The description should return a pipeline with a single depayloader named depay_backchannel. A caps query on the depayloader's sinkpad should return all possible, complete RTP caps that are going to be supported. At least the payload type, clock-rate and encoding-name need to be specified.
Note: The pipeline part passed here must end in sinks that are not waiting until pre-rolling before reaching the PAUSED state, i.e. setting async=false on #GstBaseSink. Otherwise the whole media will not be able to prepare.
the launch description
Decide whether the multicast socket should be bound to a multicast address or INADDR_ANY.
the new value
Set the kernel UDP buffer size.
the new value
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 whether retransmission requests will be sent for receiving media
Configure the media dscp qos to dscp_qos.
a new dscp qos value (0-63, or -1 to disable)
Decide whether the created media should send and receive RTCP
the new value
Configure if media created from this factory will have an EOS sent to the pipeline before shutdown.
the new value
Configure the latency used for receiving media
latency in milliseconds
The gst_parse_launch() line to use for constructing the pipeline in the default prepare vmethod.
The pipeline description should return a GstBin as the toplevel element which can be accomplished by enclosing the description with brackets '(' ')'.
The description should return a pipeline with payloaders named pay0, pay1, etc.. Each of the payloaders will result in a stream.
the launch description
Set the maximum time-to-live value of outgoing multicast packets.
the new multicast ttl value
Configure the GType of the GstRTSPMedia subclass to create (by default, overridden construct vmethods may of course do something different)
the GType of the class to create
configure multicast_iface to be used for factory.
a multicast interface name
Set permissions on factory.
a #GstRTSPPermissions
Configure the allowed profiles for factory.
the new flags
Sets a property on an object.
the name of the property to set
the value
Configure the allowed lower transport for factory.
the new flags
Sets if and how the media clock should be published according to RFC7273.
the clock publish mode
Set to %TRUE if ONVIF replay is supported by the media factory.
Configure the time to store for possible retransmission
a #GstClockTime
Configure if media created from this factory can be shared between clients.
the new value
Configure if media created from this factory should be stopped when a client disconnects without sending TEARDOWN.
the new value
Configure how media created from this factory will be suspended.
the new #GstRTSPSuspendMode
Configure if this factory creates media for PLAY or RECORD modes.
the new value
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.
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
Create a new #GstRTSPOnvifMediaFactory
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
Checks whether the client request requires backchannel.
a #GstRTSPMediaFactory
Create a new #GstRTSPOnvifMediaFactory