Trait gstreamer_base::prelude::AggregatorExt[−][src]

pub trait AggregatorExt: 'static {

Show methods    fn buffer_pool(&self) -> Option<BufferPool>;

    fn latency(&self) -> Option<ClockTime>;

    fn negotiate(&self) -> bool;

    fn peek_next_sample<P: IsA<AggregatorPad>>(&self, pad: &P) -> Option<Sample>;

    fn set_latency(
        &self, 
        min_latency: ClockTime, 
        max_latency: impl Into<Option<ClockTime>>
    );

    fn set_src_caps(&self, caps: &Caps);

    fn simple_get_next_time(&self) -> Option<ClockTime>;

    fn emits_signals(&self) -> bool;

    fn set_emit_signals(&self, emit_signals: bool);

    fn start_time(&self) -> u64;

    fn set_start_time(&self, start_time: u64);

    fn start_time_selection(&self) -> AggregatorStartTimeSelection;

    fn set_start_time_selection(
        &self, 
        start_time_selection: AggregatorStartTimeSelection
    );

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

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

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

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

}
Expand description

Trait containing all Aggregator methods.

Implementors

Aggregator

Required methods

Returns

the instance of the gst::BufferPool used by trans; free it after use it

Retrieves the latency values reported by self in response to the latency query, or GST_CLOCK_TIME_NONE if there is not live source connected and the element will not wait for the clock.

Typically only called by subclasses.

Returns

The latency or GST_CLOCK_TIME_NONE if the element does not sync

This is supported on crate feature v1_18 only.

Negotiates src pad caps with downstream elements. Unmarks GST_PAD_FLAG_NEED_RECONFIGURE in any case. But marks it again if GstAggregatorClass::negotiate fails.

Returns

true if the negotiation succeeded, else false.

This is supported on crate feature v1_18 only.

Use this function to determine what input buffers will be aggregated to produce the next output buffer. This should only be called from a signal::Aggregator::samples-selected handler, and can be used to precisely control aggregating parameters for a given set of input samples.

Returns

The sample that is about to be aggregated. It may hold a gst::Buffer or a gst::BufferList. The contents of its info structure is subclass-dependent, and documented on a subclass basis. The buffers held by the sample are not writable.

Lets Aggregator sub-classes tell the baseclass what their internal latency is. Will also post a LATENCY message on the bus so the pipeline can reconfigure its global latency.

min_latency

minimum latency

max_latency

maximum latency

This is supported on crate feature v1_16 only.
This is supported on crate feature v1_18 only.
This is supported on crate feature v1_18 only.
This is supported on crate feature v1_18 only.
This is supported on crate feature v1_18 only.
This is supported on crate feature v1_18 only.
This is supported on crate feature v1_14 only.
This is supported on crate feature v1_18 only.

Implementors

This is supported on crate feature v1_14 only.
This is supported on crate feature v1_18 only.
This is supported on crate feature v1_18 only.
This is supported on crate feature v1_16 only.
This is supported on crate feature v1_18 only.
This is supported on crate feature v1_18 only.
This is supported on crate feature v1_18 only.
This is supported on crate feature v1_18 only.
This is supported on crate feature v1_18 only.
This is supported on crate feature v1_18 only.