Trait gstreamer_editing_services::TrackElementExt

pub trait TrackElementExt: 'static {
    fn add_children_props<P: IsA<Element>>(
        &self, 
        element: &P, 
        wanted_categories: &[&str], 
        blacklist: &[&str], 
        whitelist: &[&str]
    );
    fn clamp_control_source(&self, property_name: &str);
    fn edit(
        &self, 
        layers: &[Layer], 
        mode: EditMode, 
        edge: Edge, 
        position: u64
    ) -> Result<(), BoolError>;
    fn get_auto_clamp_control_sources(&self) -> bool;
    fn get_element(&self) -> Option<Element>;
    fn get_gnlobject(&self) -> Option<Element>;
    fn get_nleobject(&self) -> Option<Element>;
    fn get_track(&self) -> Option<Track>;
    fn get_track_type(&self) -> TrackType;
    fn has_internal_source(&self) -> bool;
    fn is_active(&self) -> bool;
    fn is_core(&self) -> bool;
    fn remove_control_binding(
        &self, 
        property_name: &str
    ) -> Result<(), BoolError>;
    fn set_active(&self, active: bool) -> bool;
    fn set_auto_clamp_control_sources(&self, auto_clamp: bool);
    fn set_has_internal_source(&self, has_internal_source: bool) -> bool;
    fn set_track_type(&self, type_: TrackType);
    fn get_property_active(&self) -> bool;
    fn get_property_has_internal_source(&self) -> bool;
    fn connect_property_active_notify<F: Fn(&Self) + 'static>(
        &self, 
        f: F
    ) -> SignalHandlerId;
    fn connect_property_auto_clamp_control_sources_notify<F: Fn(&Self) + 'static>(
        &self, 
        f: F
    ) -> SignalHandlerId;
    fn connect_property_has_internal_source_notify<F: Fn(&Self) + 'static>(
        &self, 
        f: F
    ) -> SignalHandlerId;
    fn connect_property_track_notify<F: Fn(&Self) + 'static>(
        &self, 
        f: F
    ) -> SignalHandlerId;
    fn connect_property_track_type_notify<F: Fn(&Self) + 'static>(
        &self, 
        f: F
    ) -> SignalHandlerId;
}

Trait containing all TrackElement methods.

Implementors

TrackElement

Required methods

fn add_children_props<P: IsA<Element>>(
    &self,
    element: &P,
    wanted_categories: &[&str],
    blacklist: &[&str],
    whitelist: &[&str]
)

Adds all the properties of a gst::Element that match the criteria as children properties of the track element. If the name of element's gst::ElementFactory is not in blacklist, and the factory's GST_ELEMENT_METADATA_KLASS contains at least one member of wanted_categories (e.g. GST_ELEMENT_FACTORY_KLASS_DECODER), then all the properties of element that are also in whitelist are added as child properties of self using TimelineElementExt::add_child_property.

This is intended to be used by subclasses when constructing.

element

The child object to retrieve properties from

wanted_categories

An array of element factory "klass" categories to whitelist, or None to accept all categories

blacklist

A blacklist of element factory names, or None to not blacklist any element factory

whitelist

A whitelist of element property names, or None to whitelist all writeable properties

fn clamp_control_source(&self, property_name: &str)

Clamp the GstTimedValueControlSource for the specified child property to lie between the TimelineElement:in-point and out-point of the element. The out-point is the GES_TIMELINE_ELEMENT_END of the element translated from the timeline coordinates to the internal source coordinates of the element.

If the property does not have a GstTimedValueControlSource set by TrackElementExt::set_control_source, nothing happens. Otherwise, if a timed value for the control source lies before the in-point of the element, or after its out-point, then it will be removed. At the in-point and out-point times, a new interpolated value will be placed.

Feature: v1_18

property_name

The name of the child property to clamp the control source of

fn edit(
    &self,
    layers: &[Layer],
    mode: EditMode,
    edge: Edge,
    position: u64
) -> Result<(), BoolError>

👎 Deprecated

Edits the element within its track.

Deprecated since 1.18

use TimelineElementExt::edit instead.

layers

A whitelist of layers where the edit can be performed, None allows all layers in the timeline

mode

The edit mode

edge

The edge of self where the edit should occur

position

The edit position: a new location for the edge of self (in nanoseconds)

Returns

true if the edit of self completed, false on failure.

fn get_auto_clamp_control_sources(&self) -> bool

Gets TrackElement:auto-clamp-control-sources.

Feature: v1_18

Returns

Whether the control sources for the child properties of self are automatically clamped.

fn get_element(&self) -> Option<Element>

Get the gst::Element that the track element's underlying nleobject controls.

Returns

The gst::Element being controlled by the nleobject that self wraps.

fn get_gnlobject(&self) -> Option<Element>

Get the GNonLin object this object is controlling.

Deprecated

use TrackElementExt::get_nleobject instead.

Returns

The GNonLin object this object is controlling.

fn get_nleobject(&self) -> Option<Element>

Get the nleobject that this element wraps.

Returns

The nleobject that self wraps.

fn get_track(&self) -> Option<Track>

Get the TrackElement:track for the element.

Returns

The track that self belongs to, or None if it does not belong to a track.

fn get_track_type(&self) -> TrackType

Gets the TrackElement:track-type for the element.

Returns

The track-type of self.

fn has_internal_source(&self) -> bool

Gets TrackElement:has-internal-source for the element.

Feature: v1_18

Returns

true if self can have its 'internal time' properties set.

fn is_active(&self) -> bool

Gets TrackElement:active for the element.

Returns

true if self is active in its track.

fn is_core(&self) -> bool

Get whether the given track element is a core track element. That is, it was created by the create_track_elements ClipClass method for some Clip.

Note that such a track element can only be added to a clip that shares the same Asset as the clip that created it. For example, you are allowed to move core children between clips that resulted from GESContainerExt::ungroup, but you could not move the core child from a UriClip to a TitleClip or another UriClip with a different UriClip:uri.

Moreover, if a core track element is added to a clip, it will always be added as a core child. Therefore, if this returns true, then element will be a core child of its parent clip.

Feature: v1_18

Returns

true if element is a core track element.

fn remove_control_binding(&self, property_name: &str) -> Result<(), BoolError>

Removes the gst::ControlBinding that was created for the specified child property of the track element using TrackElementExt::set_control_source. The given property_name must be the same name of the child property that was passed to TrackElementExt::set_control_source.

property_name

The name of the child property to remove the control binding from

Returns

true if the control binding was removed from the specified child property of self, or false if an error occurred.

fn set_active(&self, active: bool) -> bool

Sets TrackElement:active for the element.

active

Whether self should be active in its track

Returns

true if the property was toggled.

fn set_auto_clamp_control_sources(&self, auto_clamp: bool)

Sets TrackElement:auto-clamp-control-sources. If set to true, this will immediately clamp all the control sources.

Feature: v1_18

auto_clamp

Whether to automatically clamp the control sources for the child properties of self

fn set_has_internal_source(&self, has_internal_source: bool) -> bool

Sets TrackElement:has-internal-source for the element. If this is set to false, this method will also set the TimelineElement:in-point of the element to 0 and its TimelineElement:max-duration to GST_CLOCK_TIME_NONE.

Feature: v1_18

has_internal_source

Whether the self should be allowed to have its 'internal time' properties set.

Returns

false if has_internal_source is forbidden for self and true in any other case.

fn set_track_type(&self, type_: TrackType)

Sets the TrackElement:track-type for the element.

type_

The new track-type for self

fn get_property_active(&self) -> bool

Whether the effect of the element should be applied in its TrackElement:track. If set to false, it will not be used in the output of the track.

fn get_property_has_internal_source(&self) -> bool

This property is used to determine whether the 'internal time' properties of the element have any meaning. In particular, unless this is set to true, the TimelineElement:in-point and TimelineElement:max-duration can not be set to any value other than the default 0 and GST_CLOCK_TIME_NONE, respectively.

If an element has some internal timed source gst::Element that it reads stream data from as part of its function in a Track, then you'll likely want to set this to true to allow the TimelineElement:in-point and TimelineElement:max-duration to be set.

The default value is determined by the TrackElementClass default_has_internal_source class property. For most SourceClass-es, this will be true, with the exception of those that have a potentially static source, such as ImageSourceClass and TitleSourceClass. Otherwise, this will usually be false.

For most Operation-s you will likely want to leave this set to false. The exception may be for an operation that reads some stream data from some private internal source as part of manipulating the input data from the usual linked upstream TrackElement.

For example, you may want to set this to true for a TrackType::Video operation that wraps a textoverlay that reads from a subtitle file and places its text on top of the received video data. The TimelineElement:in-point of the element would be used to shift the initial seek time on the textoverlay away from 0, and the TimelineElement:max-duration could be set to reflect the time at which the subtitle file runs out of data.

Note that GES can not support track elements that have both internal content and manipulate the timing of their data streams (time effects).

Feature: v1_18

fn connect_property_active_notify<F: Fn(&Self) + 'static>(
    &self,
    f: F
) -> SignalHandlerId

fn connect_property_auto_clamp_control_sources_notify<F: Fn(&Self) + 'static>(
    &self,
    f: F
) -> SignalHandlerId

fn connect_property_has_internal_source_notify<F: Fn(&Self) + 'static>(
    &self,
    f: F
) -> SignalHandlerId

fn connect_property_track_notify<F: Fn(&Self) + 'static>(
    &self,
    f: F
) -> SignalHandlerId

fn connect_property_track_type_notify<F: Fn(&Self) + 'static>(
    &self,
    f: F
) -> SignalHandlerId

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Implementors

impl<O: IsA<TrackElement>> TrackElementExt for O

fn add_children_props<P: IsA<Element>>(
    &self,
    element: &P,
    wanted_categories: &[&str],
    blacklist: &[&str],
    whitelist: &[&str]
)

fn clamp_control_source(&self, property_name: &str)

fn edit(
    &self,
    layers: &[Layer],
    mode: EditMode,
    edge: Edge,
    position: u64
) -> Result<(), BoolError>

👎 Deprecated

fn get_auto_clamp_control_sources(&self) -> bool

fn get_element(&self) -> Option<Element>

fn get_gnlobject(&self) -> Option<Element>

fn get_nleobject(&self) -> Option<Element>

fn get_track(&self) -> Option<Track>

fn get_track_type(&self) -> TrackType

fn has_internal_source(&self) -> bool

fn is_active(&self) -> bool

fn is_core(&self) -> bool

fn remove_control_binding(&self, property_name: &str) -> Result<(), BoolError>

fn set_active(&self, active: bool) -> bool

fn set_auto_clamp_control_sources(&self, auto_clamp: bool)

fn set_has_internal_source(&self, has_internal_source: bool) -> bool

fn set_track_type(&self, type_: TrackType)

fn get_property_active(&self) -> bool

fn get_property_has_internal_source(&self) -> bool

fn connect_property_active_notify<F: Fn(&Self) + 'static>(
    &self,
    f: F
) -> SignalHandlerId

fn connect_property_auto_clamp_control_sources_notify<F: Fn(&Self) + 'static>(
    &self,
    f: F
) -> SignalHandlerId

fn connect_property_has_internal_source_notify<F: Fn(&Self) + 'static>(
    &self,
    f: F
) -> SignalHandlerId

fn connect_property_track_notify<F: Fn(&Self) + 'static>(
    &self,
    f: F
) -> SignalHandlerId

fn connect_property_track_type_notify<F: Fn(&Self) + 'static>(
    &self,
    f: F
) -> SignalHandlerId

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