Struct gstreamer_base::PushSrc

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pub struct PushSrc { /* private fields */ }
Expand description

This class is mostly useful for elements that cannot do random access, or at least very slowly. The source usually prefers to push out a fixed size buffer.

Subclasses usually operate in a format that is different from the default GST_FORMAT_BYTES format of BaseSrc.

Classes extending this base class will usually be scheduled in a push based mode. If the peer accepts to operate without offsets and within the limits of the allowed block size, this class can operate in getrange based mode automatically. To make this possible, the subclass should implement and override the SCHEDULING query.

The subclass should extend the methods from the baseclass in addition to the ::create method.

Seeking, flushing, scheduling and sync is all handled by this base class.

§Implements

BaseSrcExt, gst::prelude::ElementExt, gst::prelude::ObjectExt, [trait@glib::ObjectExt], BaseSrcExtManual

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impl PushSrc

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pub const NONE: Option<&'static PushSrc> = None

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impl Clone for PushSrc

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for PushSrc

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl HasParamSpec for PushSrc

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type ParamSpec = ParamSpecObject

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type SetValue = PushSrc

Preferred value to be used as setter for the associated ParamSpec.
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type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, PushSrc>

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fn param_spec_builder() -> Self::BuilderFn

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impl Hash for PushSrc

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fn hash<H>(&self, state: &mut H)
where H: Hasher,

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<T: PushSrcImpl> IsSubclassable<T> for PushSrc

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fn class_init(klass: &mut Class<Self>)

Override the virtual methods of this class for the given subclass and do other class initialization. Read more
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fn instance_init(instance: &mut InitializingObject<T>)

Instance specific initialization. Read more
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impl Ord for PushSrc

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fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl ParentClassIs for PushSrc

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impl<OT: ObjectType> PartialEq<OT> for PushSrc

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fn eq(&self, other: &OT) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<OT: ObjectType> PartialOrd<OT> for PushSrc

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fn partial_cmp(&self, other: &OT) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl StaticType for PushSrc

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fn static_type() -> Type

Returns the type identifier of Self.
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impl Eq for PushSrc

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impl IsA<BaseSrc> for PushSrc

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impl IsA<Element> for PushSrc

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impl IsA<Object> for PushSrc

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impl Send for PushSrc

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impl Sync for PushSrc

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<O> BaseSrcExt for O
where O: IsA<BaseSrc>,

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fn blocksize(&self) -> u32

Get the number of bytes that self will push out with each buffer. Read more
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fn buffer_pool(&self) -> Option<BufferPool>

Returns Read more
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fn does_timestamp(&self) -> bool

Query if self timestamps outgoing buffers based on the current running_time. Read more
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fn is_async(&self) -> bool

Get the current async behaviour of self. See also set_async(). Read more
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fn is_live(&self) -> bool

Check if an element is in live mode. Read more
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fn negotiate(&self) -> bool

Negotiates src pad caps with downstream elements. Unmarks GST_PAD_FLAG_NEED_RECONFIGURE in any case. But marks it again if GstBaseSrcClass::negotiate fails. Read more
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fn new_seamless_segment(&self, start: i64, stop: i64, time: i64) -> bool

👎Deprecated: Since 1.18
Prepare a new seamless segment for emission downstream. This function must only be called by derived sub-classes, and only from the GstBaseSrcClass::create function, as the stream-lock needs to be held. Read more
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fn new_segment(&self, segment: &Segment) -> Result<(), BoolError>

Prepare a new segment for emission downstream. This function must only be called by derived sub-classes, and only from the GstBaseSrcClass::create function, as the stream-lock needs to be held. Read more
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fn push_segment(&self, segment: &Segment) -> bool

Send a new segment downstream. This function must only be called by derived sub-classes, and only from the GstBaseSrcClass::create function, as the stream-lock needs to be held. This method also requires that an out caps has been configured, so set_caps() needs to have been called before. Read more
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fn set_async(&self, async_: bool)

Configure async behaviour in self, no state change will block. The open, close, start, stop, play and pause virtual methods will be executed in a different thread and are thus allowed to perform blocking operations. Any blocking operation should be unblocked with the unlock vmethod. Read more
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fn set_automatic_eos(&self, automatic_eos: bool)

If automatic_eos is true, self will automatically go EOS if a buffer after the total size is returned. By default this is true but sources that can’t return an authoritative size and only know that they’re EOS when trying to read more should set this to false. Read more
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fn set_blocksize(&self, blocksize: u32)

Set the number of bytes that self will push out with each buffer. When blocksize is set to -1, a default length will be used. Read more
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fn set_caps(&self, caps: &Caps) -> Result<(), BoolError>

Set new caps on the basesrc source pad. Read more
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fn set_do_timestamp(&self, timestamp: bool)

Configure self to automatically timestamp outgoing buffers based on the current running_time of the pipeline. This property is mostly useful for live sources. Read more
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fn set_dynamic_size(&self, dynamic: bool)

If not dynamic, size is only updated when needed, such as when trying to read past current tracked size. Otherwise, size is checked for upon each read. Read more
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fn set_format(&self, format: Format)

Sets the default format of the source. This will be the format used for sending SEGMENT events and for performing seeks. Read more
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fn set_live(&self, live: bool)

If the element listens to a live source, live should be set to true. Read more
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fn start_complete(&self, ret: impl Into<FlowReturn>)

Complete an asynchronous start operation. When the subclass overrides the start method, it should call start_complete() when the start operation completes either from the same thread or from an asynchronous helper thread. Read more
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fn start_wait(&self) -> Result<FlowSuccess, FlowError>

Wait until the start operation completes. Read more
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fn wait_playing(&self) -> Result<FlowSuccess, FlowError>

If the GstBaseSrcClass::create method performs its own synchronisation against the clock it must unblock when going from PLAYING to the PAUSED state and call this method before continuing to produce the remaining data. Read more
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fn is_automatic_eos(&self) -> bool

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fn num_buffers(&self) -> i32

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fn set_num_buffers(&self, num_buffers: i32)

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fn is_typefind(&self) -> bool

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fn set_typefind(&self, typefind: bool)

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

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

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

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

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

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impl<O> BaseSrcExtManual for O
where O: IsA<BaseSrc>,

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fn allocator(&self) -> (Option<Allocator>, AllocationParams)

Lets BaseSrc sub-classes to know the memory allocator used by the base class and its params. Read more
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fn segment(&self) -> Segment

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fn query_latency( &self ) -> Result<(bool, Option<ClockTime>, Option<ClockTime>), BoolError>

Query the source for the latency parameters. live will be true when self is configured as a live source. min_latency and max_latency will be set to the difference between the running time and the timestamp of the first buffer. Read more
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fn src_pad(&self) -> &Pad

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> Cast for T
where T: ObjectType,

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fn upcast<T>(self) -> T
where T: ObjectType, Self: IsA<T>,

Upcasts an object to a superclass or interface T. Read more
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fn upcast_ref<T>(&self) -> &T
where T: ObjectType, Self: IsA<T>,

Upcasts an object to a reference of its superclass or interface T. Read more
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fn downcast<T>(self) -> Result<T, Self>
where T: ObjectType, Self: MayDowncastTo<T>,

Tries to downcast to a subclass or interface implementor T. Read more
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fn downcast_ref<T>(&self) -> Option<&T>
where T: ObjectType, Self: MayDowncastTo<T>,

Tries to downcast to a reference of its subclass or interface implementor T. Read more
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fn dynamic_cast<T>(self) -> Result<T, Self>
where T: ObjectType,

Tries to cast to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while upcast will do many checks at compile-time already. downcast will perform the same checks at runtime as dynamic_cast, but will also ensure some amount of compile-time safety. Read more
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fn dynamic_cast_ref<T>(&self) -> Option<&T>
where T: ObjectType,

Tries to cast to reference to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while downcast and upcast will do many checks at compile-time already. Read more
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unsafe fn unsafe_cast<T>(self) -> T
where T: ObjectType,

Casts to T unconditionally. Read more
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unsafe fn unsafe_cast_ref<T>(&self) -> &T
where T: ObjectType,

Casts to &T unconditionally. Read more
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impl<O> ElementExt for O
where O: IsA<Element>,

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fn abort_state(&self)

Abort the state change of the element. This function is used by elements that do asynchronous state changes and find out something is wrong. Read more
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fn add_pad(&self, pad: &impl IsA<Pad>) -> Result<(), BoolError>

Adds a pad (link point) to self. pad’s parent will be set to self; see GstObjectExt::set_parent() for refcounting information. Read more
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fn change_state( &self, transition: StateChange ) -> Result<StateChangeSuccess, StateChangeError>

Perform transition on self. Read more
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fn continue_state( &self, ret: impl Into<StateChangeReturn> ) -> Result<StateChangeSuccess, StateChangeError>

Commit the state change of the element and proceed to the next pending state if any. This function is used by elements that do asynchronous state changes. The core will normally call this method automatically when an element returned StateChangeReturn::Success from the state change function. Read more
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fn create_all_pads(&self)

Creates a pad for each pad template that is always available. This function is only useful during object initialization of subclasses of Element.
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fn decorate_stream_id(&self, stream_id: &str) -> GString

Creates a stream-id for self by combining the upstream information with the stream_id. Read more
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fn foreach_pad<P>(&self, func: P) -> bool
where P: FnMut(&Element, &Pad) -> bool,

Call func with user_data for each of self’s pads. func will be called exactly once for each pad that exists at the time of this call, unless one of the calls to func returns false in which case we will stop iterating pads and return early. If new pads are added or pads are removed while pads are being iterated, this will not be taken into account until next time this function is used. Read more
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fn foreach_sink_pad<P>(&self, func: P) -> bool
where P: FnMut(&Element, &Pad) -> bool,

Call func with user_data for each of self’s sink pads. func will be called exactly once for each sink pad that exists at the time of this call, unless one of the calls to func returns false in which case we will stop iterating pads and return early. If new sink pads are added or sink pads are removed while the sink pads are being iterated, this will not be taken into account until next time this function is used. Read more
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fn foreach_src_pad<P>(&self, func: P) -> bool
where P: FnMut(&Element, &Pad) -> bool,

Call func with user_data for each of self’s source pads. func will be called exactly once for each source pad that exists at the time of this call, unless one of the calls to func returns false in which case we will stop iterating pads and return early. If new source pads are added or source pads are removed while the source pads are being iterated, this will not be taken into account until next time this function is used. Read more
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fn base_time(&self) -> Option<ClockTime>

Returns the base time of the element. The base time is the absolute time of the clock when this element was last put to PLAYING. Subtracting the base time from the clock time gives the running time of the element. Read more
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fn bus(&self) -> Option<Bus>

Returns the bus of the element. Note that only a Pipeline will provide a bus for the application. Read more
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fn clock(&self) -> Option<Clock>

Gets the currently configured clock of the element. This is the clock as was last set with set_clock(). Read more
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fn compatible_pad( &self, pad: &impl IsA<Pad>, caps: Option<&Caps> ) -> Option<Pad>

Looks for an unlinked pad to which the given pad can link. It is not guaranteed that linking the pads will work, though it should work in most cases. Read more
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fn compatible_pad_template( &self, compattempl: &PadTemplate ) -> Option<PadTemplate>

Retrieves a pad template from self that is compatible with compattempl. Pads from compatible templates can be linked together. Read more
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fn context(&self, context_type: &str) -> Option<Context>

Gets the context with context_type set on the element or NULL. Read more
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fn contexts(&self) -> Vec<Context>

Gets the contexts set on the element. Read more
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fn factory(&self) -> Option<ElementFactory>

Retrieves the factory that was used to create this element. Read more
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fn start_time(&self) -> Option<ClockTime>

Returns the start time of the element. The start time is the running time of the clock when this element was last put to PAUSED. Read more
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fn state( &self, timeout: impl Into<Option<ClockTime>> ) -> (Result<StateChangeSuccess, StateChangeError>, State, State)

Gets the state of the element. Read more
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fn static_pad(&self, name: &str) -> Option<Pad>

Retrieves a pad from self by name. This version only retrieves already-existing (i.e. ‘static’) pads. Read more
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fn is_locked_state(&self) -> bool

Checks if the state of an element is locked. If the state of an element is locked, state changes of the parent don’t affect the element. This way you can leave currently unused elements inside bins. Just lock their state before changing the state from State::Null. Read more
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fn lost_state(&self)

Brings the element to the lost state. The current state of the element is copied to the pending state so that any call to state() will return StateChangeReturn::Async. Read more
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fn no_more_pads(&self)

Use this function to signal that the element does not expect any more pads to show up in the current pipeline. This function should be called whenever pads have been added by the element itself. Elements with PadPresence::Sometimes pad templates use this in combination with autopluggers to figure out that the element is done initializing its pads. Read more
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fn post_message(&self, message: Message) -> Result<(), BoolError>

Post a message on the element’s Bus. This function takes ownership of the message; if you want to access the message after this call, you should add an additional reference before calling. Read more
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fn provide_clock(&self) -> Option<Clock>

Get the clock provided by the given element. Read more
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fn release_request_pad(&self, pad: &impl IsA<Pad>)

Makes the element free the previously requested pad as obtained with request_pad(). Read more
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fn remove_pad(&self, pad: &impl IsA<Pad>) -> Result<(), BoolError>

Removes pad from self. pad will be destroyed if it has not been referenced elsewhere using GstObjectExt::unparent(). Read more
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fn request_pad( &self, templ: &PadTemplate, name: Option<&str>, caps: Option<&Caps> ) -> Option<Pad>

Retrieves a request pad from the element according to the provided template. Pad templates can be looked up using ElementFactory::static_pad_templates(). Read more
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fn set_base_time(&self, time: ClockTime)

Set the base time of an element. See base_time(). Read more
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fn set_bus(&self, bus: Option<&Bus>)

Sets the bus of the element. Increases the refcount on the bus. For internal use only, unless you’re testing elements. Read more
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fn set_clock(&self, clock: Option<&impl IsA<Clock>>) -> Result<(), BoolError>

Sets the clock for the element. This function increases the refcount on the clock. Any previously set clock on the object is unreffed. Read more
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fn set_context(&self, context: &Context)

Sets the context of the element. Increases the refcount of the context. Read more
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fn set_locked_state(&self, locked_state: bool) -> bool

Locks the state of an element, so state changes of the parent don’t affect this element anymore. Read more
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fn set_start_time(&self, time: impl Into<Option<ClockTime>>)

Set the start time of an element. The start time of the element is the running time of the element when it last went to the PAUSED state. In READY or after a flushing seek, it is set to 0. Read more
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fn set_state( &self, state: State ) -> Result<StateChangeSuccess, StateChangeError>

Sets the state of the element. This function will try to set the requested state by going through all the intermediary states and calling the class’s state change function for each. Read more
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fn sync_state_with_parent(&self) -> Result<(), BoolError>

Tries to change the state of the element to the same as its parent. If this function returns false, the state of element is undefined. Read more
Unlinks all source pads of the source element with all sink pads of the sink element to which they are linked. Read more
Unlinks the two named pads of the source and destination elements. Read more
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fn connect_no_more_pads<F>(&self, f: F) -> SignalHandlerId
where F: Fn(&Self) + Send + Sync + 'static,

This signals that the element will not generate more dynamic pads. Note that this signal will usually be emitted from the context of the streaming thread.
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fn connect_pad_added<F>(&self, f: F) -> SignalHandlerId
where F: Fn(&Self, &Pad) + Send + Sync + 'static,

a new Pad has been added to the element. Note that this signal will usually be emitted from the context of the streaming thread. Also keep in mind that if you add new elements to the pipeline in the signal handler you will need to set them to the desired target state with set_state() or sync_state_with_parent(). Read more
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fn connect_pad_removed<F>(&self, f: F) -> SignalHandlerId
where F: Fn(&Self, &Pad) + Send + Sync + 'static,

a Pad has been removed from the element Read more
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impl<O> ElementExtManual for O
where O: IsA<Element>,

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fn element_class(&self) -> &Class<Element>

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fn current_state(&self) -> State

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fn pending_state(&self) -> State

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fn query(&self, query: &mut QueryRef) -> bool

Performs a query on the given element. Read more
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fn send_event(&self, event: impl Into<Event>) -> bool

Sends an event to an element. If the element doesn’t implement an event handler, the event will be pushed on a random linked sink pad for downstream events or a random linked source pad for upstream events. Read more
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fn metadata<'a>(&self, key: &str) -> Option<&'a str>

Get metadata with key in klass. Read more
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fn pad_template(&self, name: &str) -> Option<PadTemplate>

Retrieves a padtemplate from self with the given name. Read more
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fn pad_template_list(&self) -> List<PadTemplate>

Retrieves a list of the pad templates associated with self. The list must not be modified by the calling code. Read more
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fn message_full<T>( &self, type_: ElementMessageType, code: T, message: Option<&str>, debug: Option<&str>, file: &str, function: &str, line: u32 )

Post an error, warning or info message on the bus from inside an element. Read more
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fn set_element_flags(&self, flags: ElementFlags)

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fn unset_element_flags(&self, flags: ElementFlags)

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fn element_flags(&self) -> ElementFlags

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fn message_full_with_details<T>( &self, type_: ElementMessageType, code: T, message: Option<&str>, debug: Option<&str>, file: &str, function: &str, line: u32, structure: Structure )

Post an error, warning or info message on the bus from inside an element. Read more
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fn post_error_message(&self, msg: ErrorMessage)

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fn iterate_pads(&self) -> Iterator<Pad>

Retrieves an iterator of self’s pads. The iterator should be freed after usage. Also more specialized iterators exists such as iterate_src_pads() or iterate_sink_pads(). Read more
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fn iterate_sink_pads(&self) -> Iterator<Pad>

Retrieves an iterator of self’s sink pads. Read more
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fn iterate_src_pads(&self) -> Iterator<Pad>

Retrieves an iterator of self’s source pads. Read more
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fn pads(&self) -> Vec<Pad>

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fn sink_pads(&self) -> Vec<Pad>

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fn src_pads(&self) -> Vec<Pad>

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fn num_pads(&self) -> u16

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fn num_sink_pads(&self) -> u16

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fn num_src_pads(&self) -> u16

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fn add_property_deep_notify_watch( &self, property_name: Option<&str>, include_value: bool ) -> NotifyWatchId

property_name Read more
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fn add_property_notify_watch( &self, property_name: Option<&str>, include_value: bool ) -> NotifyWatchId

property_name Read more
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fn remove_property_notify_watch(&self, watch_id: NotifyWatchId)

watch_id Read more
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fn query_convert<U>(&self, src_val: impl FormattedValue) -> Option<U>

Queries an element to convert src_val in src_format to dest_format. Read more
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fn query_convert_generic( &self, src_val: impl FormattedValue, dest_format: Format ) -> Option<GenericFormattedValue>

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fn query_duration<T>(&self) -> Option<T>

Queries an element (usually top-level pipeline or playbin element) for the total stream duration in nanoseconds. This query will only work once the pipeline is prerolled (i.e. reached PAUSED or PLAYING state). The application will receive an ASYNC_DONE message on the pipeline bus when that is the case. Read more
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fn query_duration_generic( &self, format: Format ) -> Option<GenericFormattedValue>

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fn query_position<T>(&self) -> Option<T>

Queries an element (usually top-level pipeline or playbin element) for the stream position in nanoseconds. This will be a value between 0 and the stream duration (if the stream duration is known). This query will usually only work once the pipeline is prerolled (i.e. reached PAUSED or PLAYING state). The application will receive an ASYNC_DONE message on the pipeline bus when that is the case. Read more
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fn query_position_generic( &self, format: Format ) -> Option<GenericFormattedValue>

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fn seek<V>( &self, rate: f64, flags: SeekFlags, start_type: SeekType, start: V, stop_type: SeekType, stop: impl CompatibleFormattedValue<V> ) -> Result<(), BoolError>
where V: FormattedValue,

Sends a seek event to an element. See gst_event_new_seek() for the details of the parameters. The seek event is sent to the element using send_event(). Read more
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fn seek_simple( &self, seek_flags: SeekFlags, seek_pos: impl FormattedValue ) -> Result<(), BoolError>

Simple API to perform a seek on the given element, meaning it just seeks to the given position relative to the start of the stream. For more complex operations like segment seeks (e.g. for looping) or changing the playback rate or seeking relative to the last configured playback segment you should use seek(). Read more
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fn call_async<F>(&self, func: F)
where F: FnOnce(&Self) + Send + 'static,

Calls func from another thread and passes user_data to it. This is to be used for cases when a state change has to be performed from a streaming thread, directly via ElementExt::set_state() or indirectly e.g. via SEEK events. Read more
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fn call_async_future<F, T>( &self, func: F ) -> Pin<Box<dyn Future<Output = T> + Send>>
where F: FnOnce(&Self) -> T + Send + 'static, T: Send + 'static,

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fn current_running_time(&self) -> Option<ClockTime>

Returns the running time of the element. The running time is the element’s clock time minus its base time. Will return GST_CLOCK_TIME_NONE if the element has no clock, or if its base time has not been set. Read more
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fn current_clock_time(&self) -> Option<ClockTime>

Returns the current clock time of the element, as in, the time of the element’s clock, or GST_CLOCK_TIME_NONE if there is no clock. Read more
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fn request_pad_simple(&self, name: &str) -> Option<Pad>

The name of this function is confusing to people learning GStreamer. request_pad_simple() aims at making it more explicit it is a simplified ElementExt::request_pad(). Read more
Links self to dest. The link must be from source to destination; the other direction will not be tried. The function looks for existing pads that aren’t linked yet. It will request new pads if necessary. Such pads need to be released manually when unlinking. If multiple links are possible, only one is established. Read more
Links self to dest using the given caps as filtercaps. The link must be from source to destination; the other direction will not be tried. The function looks for existing pads that aren’t linked yet. It will request new pads if necessary. If multiple links are possible, only one is established. Read more
Links the two named pads of the source and destination elements. Side effect is that if one of the pads has no parent, it becomes a child of the parent of the other element. If they have different parents, the link fails. Read more
Links the two named pads of the source and destination elements. Side effect is that if one of the pads has no parent, it becomes a child of the parent of the other element. If they have different parents, the link fails. If caps is not None, makes sure that the caps of the link is a subset of caps. Read more
Links the two named pads of the source and destination elements. Side effect is that if one of the pads has no parent, it becomes a child of the parent of the other element. If they have different parents, the link fails. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *const GList, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec(_: *const GList, _: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(_: *const GList, _: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GPtrArray> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *const GPtrArray, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec( _: *const GPtrArray, _: usize ) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(_: *const GPtrArray, _: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GSList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *const GSList, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec(_: *const GSList, _: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(_: *const GSList, _: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *mut GList, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec(ptr: *mut GList, num: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(ptr: *mut GList, num: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GPtrArray> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *mut GPtrArray, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec( ptr: *mut GPtrArray, num: usize ) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(ptr: *mut GPtrArray, num: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GSList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *mut GSList, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec(ptr: *mut GSList, num: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(ptr: *mut GSList, num: usize) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GList> for T

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unsafe fn from_glib_none_as_vec(ptr: *const GList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(_: *const GList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(_: *const GList) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GPtrArray> for T

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unsafe fn from_glib_none_as_vec(ptr: *const GPtrArray) -> Vec<T>

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unsafe fn from_glib_container_as_vec(_: *const GPtrArray) -> Vec<T>

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unsafe fn from_glib_full_as_vec(_: *const GPtrArray) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GSList> for T

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unsafe fn from_glib_none_as_vec(ptr: *const GSList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(_: *const GSList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(_: *const GSList) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GList> for T

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unsafe fn from_glib_none_as_vec(ptr: *mut GList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(ptr: *mut GList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(ptr: *mut GList) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GPtrArray> for T

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unsafe fn from_glib_none_as_vec(ptr: *mut GPtrArray) -> Vec<T>

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unsafe fn from_glib_container_as_vec(ptr: *mut GPtrArray) -> Vec<T>

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unsafe fn from_glib_full_as_vec(ptr: *mut GPtrArray) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GSList> for T

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unsafe fn from_glib_none_as_vec(ptr: *mut GSList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(ptr: *mut GSList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(ptr: *mut GSList) -> Vec<T>

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

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fn set_property_from_str(&self, name: &str, value: &str)

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

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fn add_control_binding( &self, binding: &impl IsA<ControlBinding> ) -> Result<(), BoolError>

Attach the ControlBinding to the object. If there already was a ControlBinding for this property it will be replaced. Read more
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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.. Read more
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fn control_binding(&self, property_name: &str) -> Option<ControlBinding>

Gets the corresponding ControlBinding for the property. This should be unreferenced again after use. Read more
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fn control_rate(&self) -> Option<ClockTime>

Obtain the control-rate for this self. Audio processing Element objects will use this rate to sub-divide their processing loop and call sync_values() in between. The length of the processing segment should be up to control-rate nanoseconds. Read more
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fn 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. Read more
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fn parent(&self) -> Option<Object>

Returns the parent of self. This function increases the refcount of the parent object so you should gst_object_unref() it after usage. Read more
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fn path_string(&self) -> GString

Generates a string describing the path of self in the object hierarchy. Only useful (or used) for debugging. Read more
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fn value( &self, property_name: &str, timestamp: impl Into<Option<ClockTime>> ) -> Option<Value>

Gets the value for the given controlled property at the requested time. Read more
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fn has_active_control_bindings(&self) -> bool

Check if the self has active controlled properties. Read more
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fn has_ancestor(&self, ancestor: &impl IsA<Object>) -> bool

Check if self has an ancestor ancestor somewhere up in the hierarchy. One can e.g. check if a Element is inside a Pipeline. Read more
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fn has_as_ancestor(&self, ancestor: &impl IsA<Object>) -> bool

Check if self has an ancestor ancestor somewhere up in the hierarchy. One can e.g. check if a Element is inside a Pipeline. Read more
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fn has_as_parent(&self, parent: &impl IsA<Object>) -> bool

Check if parent is the parent of self. E.g. a Element can check if it owns a given Pad. Read more
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fn remove_control_binding(&self, binding: &impl IsA<ControlBinding>) -> bool

Removes the corresponding ControlBinding. If it was the last ref of the binding, it will be disposed. Read more
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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. sync_values() will do nothing for the property. Read more
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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. sync_values() will do nothing. Read more
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fn set_control_rate(&self, control_rate: impl Into<Option<ClockTime>>)

Change the control-rate for this self. Audio processing Element objects will use this rate to sub-divide their processing loop and call sync_values() in between. The length of the processing segment should be up to control-rate nanoseconds. Read more
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fn set_parent(&self, parent: &impl IsA<Object>) -> Result<(), BoolError>

Sets the parent of self to parent. The object’s reference count will be incremented, and any floating reference will be removed (see gst_object_ref_sink()). Read more
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fn suggest_next_sync(&self) -> Option<ClockTime>

Returns a suggestion for timestamps where buffers should be split to get best controller results. Read more
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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. Read more
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fn unparent(&self)

Clear the parent of self, removing the associated reference. This function decreases the refcount of self. Read more
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fn connect_parent_notify<F>(&self, f: F) -> SignalHandlerId
where F: Fn(&Self) + Send + Sync + 'static,

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

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fn connect_deep_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
where F: Fn(&Self, &Object, &ParamSpec) + Send + Sync + 'static,

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fn set_object_flags(&self, flags: ObjectFlags)

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fn unset_object_flags(&self, flags: ObjectFlags)

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fn object_flags(&self) -> ObjectFlags

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fn g_value_array( &self, property_name: &str, timestamp: ClockTime, interval: ClockTime, values: &mut [Value] ) -> Result<(), BoolError>

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fn object_lock(&self) -> ObjectLockGuard<'_, Self>

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoClosureReturnValue for T
where T: Into<Value>,

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impl<U> IsSubclassableExt for U

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impl<T> ObjectExt for T
where T: ObjectType,

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fn is<U>(&self) -> bool
where U: StaticType,

Returns true if the object is an instance of (can be cast to) T.
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fn type_(&self) -> Type

Returns the type of the object.
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fn object_class(&self) -> &Class<Object>

Returns the ObjectClass of the object. Read more
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fn class(&self) -> &Class<T>
where T: IsClass,

Returns the class of the object.
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fn class_of<U>(&self) -> Option<&Class<U>>
where U: IsClass,

Returns the class of the object in the given type T. Read more
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fn interface<U>(&self) -> Option<InterfaceRef<'_, U>>
where U: IsInterface,

Returns the interface T of the object. Read more
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fn set_property(&self, property_name: &str, value: impl Into<Value>)

Sets the property property_name of the object to value value. Read more
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fn set_property_from_value(&self, property_name: &str, value: &Value)

Sets the property property_name of the object to value value. Read more
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fn set_properties(&self, property_values: &[(&str, &dyn ToValue)])

Sets multiple properties of the object at once. Read more
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fn set_properties_from_value(&self, property_values: &[(&str, Value)])

Sets multiple properties of the object at once. Read more
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fn property<V>(&self, property_name: &str) -> V
where V: for<'b> FromValue<'b> + 'static,

Gets the property property_name of the object and cast it to the type V. Read more
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fn property_value(&self, property_name: &str) -> Value

Gets the property property_name of the object. Read more
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fn has_property(&self, property_name: &str, type_: Option<Type>) -> bool

Check if the object has a property property_name of the given type_. Read more
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fn property_type(&self, property_name: &str) -> Option<Type>

Get the type of the property property_name of this object. Read more
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fn find_property(&self, property_name: &str) -> Option<ParamSpec>

Get the ParamSpec of the property property_name of this object.
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fn list_properties(&self) -> PtrSlice<ParamSpec>

Return all ParamSpec of the properties of this object.
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fn freeze_notify(&self) -> PropertyNotificationFreezeGuard

Freeze all property notifications until the return guard object is dropped. Read more
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unsafe fn set_qdata<QD>(&self, key: Quark, value: QD)
where QD: 'static,

Set arbitrary data on this object with the given key. Read more
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unsafe fn qdata<QD>(&self, key: Quark) -> Option<NonNull<QD>>
where QD: 'static,

Return previously set arbitrary data of this object with the given key. Read more
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unsafe fn steal_qdata<QD>(&self, key: Quark) -> Option<QD>
where QD: 'static,

Retrieve previously set arbitrary data of this object with the given key. Read more
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unsafe fn set_data<QD>(&self, key: &str, value: QD)
where QD: 'static,

Set arbitrary data on this object with the given key. Read more
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unsafe fn data<QD>(&self, key: &str) -> Option<NonNull<QD>>
where QD: 'static,

Return previously set arbitrary data of this object with the given key. Read more
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unsafe fn steal_data<QD>(&self, key: &str) -> Option<QD>
where QD: 'static,

Retrieve previously set arbitrary data of this object with the given key. Read more
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fn block_signal(&self, handler_id: &SignalHandlerId)

Block a given signal handler. Read more
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fn unblock_signal(&self, handler_id: &SignalHandlerId)

Unblock a given signal handler.
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fn stop_signal_emission(&self, signal_id: SignalId, detail: Option<Quark>)

Stop emission of the currently emitted signal.
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fn stop_signal_emission_by_name(&self, signal_name: &str)

Stop emission of the currently emitted signal by the (possibly detailed) signal name.
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fn connect<F>( &self, signal_name: &str, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,

Connect to the signal signal_name on this object. Read more
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fn connect_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,

Connect to the signal signal_id on this object. Read more
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fn connect_local<F>( &self, signal_name: &str, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + 'static,

Connect to the signal signal_name on this object. Read more
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fn connect_local_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + 'static,

Connect to the signal signal_id on this object. Read more
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unsafe fn connect_unsafe<F>( &self, signal_name: &str, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value>,

Connect to the signal signal_name on this object. Read more
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unsafe fn connect_unsafe_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value>,

Connect to the signal signal_id on this object. Read more
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fn connect_closure( &self, signal_name: &str, after: bool, closure: RustClosure ) -> SignalHandlerId

Connect a closure to the signal signal_name on this object. Read more
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fn connect_closure_id( &self, signal_id: SignalId, details: Option<Quark>, after: bool, closure: RustClosure ) -> SignalHandlerId

Connect a closure to the signal signal_id on this object. Read more
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fn watch_closure(&self, closure: &impl AsRef<Closure>)

Limits the lifetime of closure to the lifetime of the object. When the object’s reference count drops to zero, the closure will be invalidated. An invalidated closure will ignore any calls to invoke_with_values, or invoke when using Rust closures.
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fn emit<R>(&self, signal_id: SignalId, args: &[&dyn ToValue]) -> R

Emit signal by signal id. Read more
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fn emit_with_values(&self, signal_id: SignalId, args: &[Value]) -> Option<Value>

Same as Self::emit but takes Value for the arguments.
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fn emit_by_name<R>(&self, signal_name: &str, args: &[&dyn ToValue]) -> R

Emit signal by its name. Read more
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fn emit_by_name_with_values( &self, signal_name: &str, args: &[Value] ) -> Option<Value>

Emit signal by its name. Read more
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fn emit_by_name_with_details<R>( &self, signal_name: &str, details: Quark, args: &[&dyn ToValue] ) -> R

Emit signal by its name with details. Read more
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fn emit_by_name_with_details_and_values( &self, signal_name: &str, details: Quark, args: &[Value] ) -> Option<Value>

Emit signal by its name with details. Read more
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fn emit_with_details<R>( &self, signal_id: SignalId, details: Quark, args: &[&dyn ToValue] ) -> R

Emit signal by signal id with details. Read more
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fn emit_with_details_and_values( &self, signal_id: SignalId, details: Quark, args: &[Value] ) -> Option<Value>

Emit signal by signal id with details. Read more
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fn disconnect(&self, handler_id: SignalHandlerId)

Disconnect a previously connected signal handler.
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fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
where F: Fn(&T, &ParamSpec) + Send + Sync + 'static,

Connect to the notify signal of the object. Read more
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fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
where F: Fn(&T, &ParamSpec) + 'static,

Connect to the notify signal of the object. Read more
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unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F ) -> SignalHandlerId
where F: Fn(&T, &ParamSpec),

Connect to the notify signal of the object. Read more
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fn notify(&self, property_name: &str)

Notify that the given property has changed its value. Read more
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fn notify_by_pspec(&self, pspec: &ParamSpec)

Notify that the given property has changed its value. Read more
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fn downgrade(&self) -> WeakRef<T>

Downgrade this object to a weak reference.
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fn add_weak_ref_notify<F>(&self, f: F) -> WeakRefNotify<T>
where F: FnOnce() + Send + 'static,

Add a callback to be notified when the Object is disposed.
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fn add_weak_ref_notify_local<F>(&self, f: F) -> WeakRefNotify<T>
where F: FnOnce() + 'static,

Add a callback to be notified when the Object is disposed. Read more
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fn bind_property<'a, 'f, 't, O>( &'a self, source_property: &'a str, target: &'a O, target_property: &'a str ) -> BindingBuilder<'a, 'f, 't>
where O: ObjectType,

Bind property source_property on this object to the target_property on the target object. Read more
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fn ref_count(&self) -> u32

Returns the strong reference count of this object.
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unsafe fn run_dispose(&self)

Runs the dispose mechanism of the object. Read more
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impl<T> Property for T
where T: HasParamSpec,

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type Value = T

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impl<T> PropertyGet for T
where T: HasParamSpec,

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type Value = T

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fn get<R, F>(&self, f: F) -> R
where F: Fn(&<T as PropertyGet>::Value) -> R,

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impl<T> StaticTypeExt for T
where T: StaticType,

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fn ensure_type()

Ensures that the type has been registered with the type system.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToSendValue for T
where T: Send + ToValue + ?Sized,

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fn to_send_value(&self) -> SendValue

Returns a SendValue clone of self.
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impl<T> TransparentType for T

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T> TryFromClosureReturnValue for T
where T: for<'a> FromValue<'a> + StaticType + 'static,

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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<'a, T, C, E> FromValueOptional<'a> for T
where T: FromValue<'a, Checker = C>, C: ValueTypeChecker<Error = ValueTypeMismatchOrNoneError<E>>, E: Error + Send + 'static,

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impl<Super, Sub> MayDowncastTo<Sub> for Super
where Super: IsA<Super>, Sub: IsA<Super>,