Trait gstreamer_app::prelude::GstObjectExt

pub trait GstObjectExt: 'static {
    fn default_error(&self, error: &Error, debug: Option<&str>);
    fn get_control_rate(&self) -> ClockTime;
    fn get_name(&self) -> GString;
    fn get_parent(&self) -> Option<Object>;
    fn get_path_string(&self) -> GString;
    fn has_active_control_bindings(&self) -> bool;
    fn has_ancestor<P>(&self, ancestor: &P) -> bool
    where
        P: IsA<Object>;
    fn has_as_ancestor<P>(&self, ancestor: &P) -> bool
    where
        P: IsA<Object>;
    fn has_as_parent<P>(&self, parent: &P) -> bool
    where
        P: IsA<Object>;
    fn set_control_binding_disabled(&self, property_name: &str, disabled: bool);
    fn set_control_bindings_disabled(&self, disabled: bool);
    fn set_control_rate(&self, control_rate: ClockTime);
    fn set_parent<P>(&self, parent: &P) -> Result<(), BoolError>
    where
        P: IsA<Object>;
    fn suggest_next_sync(&self) -> ClockTime;
    fn sync_values(&self, timestamp: ClockTime) -> Result<(), BoolError>;
    fn unparent(&self);
    fn connect_property_parent_notify<F>(&self, f: F) -> SignalHandlerId
    where
        F: 'static + Send + Sync + Fn(&Self);
}

Trait containing all Object methods.

Implementors

Allocator, BufferPool, Bus, Clock, DeviceMonitor, DeviceProvider, Device, Element, Object, PadTemplate, Pad, PluginFeature, Plugin, Registry, StreamCollection, Stream

Required methods

fn default_error(&self, error: &Error, debug: Option<&str>)

A default error function that uses g_printerr to display the error message and the optional debug string..

The default handler will simply print the error string using g_print.

error

the GError.

debug

an additional debug information string, or None

fn get_control_rate(&self) -> ClockTime

Obtain the control-rate for this self. Audio processing Element objects will use this rate to sub-divide their processing loop and call GstObjectExt::sync_values in between. The length of the processing segment should be up to control-rate nanoseconds.

If the self is not under property control, this will return GST_CLOCK_TIME_NONE. This allows the element to avoid the sub-dividing.

The control-rate is not expected to change if the element is in State::Paused or State::Playing.

Returns

the control rate in nanoseconds

fn get_name(&self) -> GString

Returns a copy of the name of self. Caller should g_free the return value after usage. For a nameless object, this returns None, which you can safely g_free as well.

Free-function: g_free

Returns

the name of self. g_free after usage.

MT safe. This function grabs and releases self's LOCK.

fn get_parent(&self) -> Option<Object>

Returns the parent of self. This function increases the refcount of the parent object so you should GstObjectExt::unref it after usage.

Returns

parent of self, this can be None if self has no parent. unref after usage.

MT safe. Grabs and releases self's LOCK.

fn get_path_string(&self) -> GString

Generates a string describing the path of self in the object hierarchy. Only useful (or used) for debugging.

Free-function: g_free

Returns

a string describing the path of self. You must g_free the string after usage.

MT safe. Grabs and releases the Object's LOCK for all objects in the hierarchy.

fn has_active_control_bindings(&self) -> bool

Check if the self has active controlled properties.

Returns

true if the object has active controlled properties

fn has_ancestor<P>(&self, ancestor: &P) -> bool where
    P: IsA<Object>, 

Check if self has an ancestor ancestor somewhere up in the hierarchy. One can e.g. check if a Element is inside a Pipeline.

Deprecated

Use GstObjectExt::has_as_ancestor instead.

MT safe. Grabs and releases self's locks.

ancestor

a Object to check as ancestor

Returns

true if ancestor is an ancestor of self.

fn has_as_ancestor<P>(&self, ancestor: &P) -> bool where
    P: IsA<Object>, 

Check if self has an ancestor ancestor somewhere up in the hierarchy. One can e.g. check if a Element is inside a Pipeline.

ancestor

a Object to check as ancestor

Returns

true if ancestor is an ancestor of self.

MT safe. Grabs and releases self's locks.

fn has_as_parent<P>(&self, parent: &P) -> bool where
    P: IsA<Object>, 

Check if parent is the parent of self. E.g. a Element can check if it owns a given Pad.

parent

a Object to check as parent

Returns

false if either self or parent is None. true if parent is the parent of self. Otherwise false.

MT safe. Grabs and releases self's locks.

fn set_control_binding_disabled(&self, property_name: &str, disabled: bool)

This function is used to disable the control bindings on a property for some time, i.e. GstObjectExt::sync_values will do nothing for the property.

property_name

property to disable

disabled

boolean that specifies whether to disable the controller or not.

fn set_control_bindings_disabled(&self, disabled: bool)

This function is used to disable all controlled properties of the self for some time, i.e. GstObjectExt::sync_values will do nothing.

disabled

boolean that specifies whether to disable the controller or not.

fn set_control_rate(&self, control_rate: ClockTime)

Change the control-rate for this self. Audio processing Element objects will use this rate to sub-divide their processing loop and call GstObjectExt::sync_values in between. The length of the processing segment should be up to control-rate nanoseconds.

The control-rate should not change if the element is in State::Paused or State::Playing.

control_rate

the new control-rate in nanoseconds.

fn set_parent<P>(&self, parent: &P) -> Result<(), BoolError> where
    P: IsA<Object>, 

Sets the parent of self to parent. The object's reference count will be incremented, and any floating reference will be removed (see Object::ref_sink).

parent

new parent of object

Returns

true if parent could be set or false when self already had a parent or self and parent are the same.

MT safe. Grabs and releases self's LOCK.

fn suggest_next_sync(&self) -> ClockTime

Returns a suggestion for timestamps where buffers should be split to get best controller results.

Returns

Returns the suggested timestamp or GST_CLOCK_TIME_NONE if no control-rate was set.

fn sync_values(&self, timestamp: ClockTime) -> Result<(), BoolError>

Sets the properties of the object, according to the GstControlSources that (maybe) handle them and for the given timestamp.

If this function fails, it is most likely the application developers fault. Most probably the control sources are not setup correctly.

timestamp

the time that should be processed

Returns

true if the controller values could be applied to the object properties, false otherwise

fn unparent(&self)

Clear the parent of self, removing the associated reference. This function decreases the refcount of self.

MT safe. Grabs and releases self's lock.

fn connect_property_parent_notify<F>(&self, f: F) -> SignalHandlerId where
    F: 'static + Send + Sync + Fn(&Self), 

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Implementors

impl<O> GstObjectExt for O where
    O: IsA<Object>, 

fn default_error(&self, error: &Error, debug: Option<&str>)

fn get_control_rate(&self) -> ClockTime

fn get_name(&self) -> GString

fn get_parent(&self) -> Option<Object>

fn get_path_string(&self) -> GString

fn has_active_control_bindings(&self) -> bool

fn has_ancestor<P>(&self, ancestor: &P) -> bool where
    P: IsA<Object>, 

fn has_as_ancestor<P>(&self, ancestor: &P) -> bool where
    P: IsA<Object>, 

fn has_as_parent<P>(&self, parent: &P) -> bool where
    P: IsA<Object>, 

fn set_control_binding_disabled(&self, property_name: &str, disabled: bool)

fn set_control_bindings_disabled(&self, disabled: bool)

fn set_control_rate(&self, control_rate: ClockTime)

fn set_parent<P>(&self, parent: &P) -> Result<(), BoolError> where
    P: IsA<Object>, 

fn suggest_next_sync(&self) -> ClockTime

fn sync_values(&self, timestamp: ClockTime) -> Result<(), BoolError>

fn unparent(&self)

fn connect_property_parent_notify<F>(&self, f: F) -> SignalHandlerId where
    F: 'static + Send + Sync + Fn(&O), 

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