Package org.freedesktop.gstreamer.app

Interface AppSink.NewSampleCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

AppSink

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public static interface AppSink.NewSampleCallback
extends FunctionPointer

Functional interface declaration of the NewSampleCallback callback.

See Also:

• run()

Method Summary

Modifier and Type	Method	Description
FlowReturn	run()	Signal that a new sample is available.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment) method.
default int	upcall(MemorySegment sourceAppSink)	The upcall method is called from native code.

Method Details

run

FlowReturn run()

Signal that a new sample is available.

This signal is emitted from the streaming thread and only when the "emit-signals" property is true.

The new sample can be retrieved with the "pull-sample" action signal or gst_app_sink_pull_sample() either from this signal callback or from any other thread.

Note that this signal is only emitted when the "emit-signals" property is set to true, which it is not by default for performance reasons.

upcall

default int upcall(MemorySegment sourceAppSink)

The upcall method is called from native code. The parameters are marshaled and run() is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer