Interface ControlSourceGetValue

All Superinterfaces:

FunctionPointer

Functional Interface:

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

@FunctionalInterface
@Generated("org.javagi.JavaGI")
public interface ControlSourceGetValue
extends FunctionPointer

Functional interface declaration of the ControlSourceGetValue callback.

See Also:

• run(ControlSource, ClockTime, MemorySegment)

Method Summary

Modifier and Type	Method	Description
boolean	run(ControlSource self, ClockTime timestamp, MemorySegment value)	Function for returning a value for a given timestamp.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(MemorySegment, long, MemorySegment) method.
default int	upcall(MemorySegment self, long timestamp, MemorySegment value)	The upcall method is called from native code.

Method Details

run

boolean run(ControlSource self,
 ClockTime timestamp,
 MemorySegment value)

Function for returning a value for a given timestamp.

Parameters:

self - the GstControlSource instance

timestamp - timestamp for which a value should be calculated

value - a value which will be set to the result.

Returns:

true if the value was successfully calculated.

upcall

default int upcall(MemorySegment self,
 long timestamp,
 MemorySegment value)

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

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(MemorySegment, long, MemorySegment) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer