Interface MetaInitFunction

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 MetaInitFunction
extends FunctionPointer

Functional interface declaration of the MetaInitFunction callback.

See Also:

• run(Meta, MemorySegment, Buffer)

Method Summary

Modifier and Type	Method	Description
boolean	run(Meta meta, @Nullable MemorySegment params, Buffer buffer)	Function called when meta is initialized in buffer.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(MemorySegment, MemorySegment, MemorySegment) method.
default int	upcall(MemorySegment meta, MemorySegment params, MemorySegment buffer)	The upcall method is called from native code.

Method Details

run

boolean run(Meta meta,
 @Nullable MemorySegment params,
 Buffer buffer)

Function called when meta is initialized in buffer.

Parameters:

meta - a GstMeta

params - parameters passed to the init function

buffer - a GstBuffer

upcall

default int upcall(MemorySegment meta,
 MemorySegment params,
 MemorySegment buffer)

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

toCallback

default MemorySegment toCallback(Arena arena)

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

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer