Interface MetaTransformFunction

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 MetaTransformFunction
extends FunctionPointer

Functional interface declaration of the MetaTransformFunction callback.

See Also:

• run(Buffer, Meta, Buffer, Quark, MemorySegment)

Method Summary

Modifier and Type	Method	Description
boolean	run(Buffer transbuf, Meta meta, Buffer buffer, Quark type, @Nullable MemorySegment data)	Function called for each meta in buffer as a result of performing a transformation on transbuf. Additional type specific transform data is passed to the function as data.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(MemorySegment, MemorySegment, MemorySegment, int, MemorySegment) method.
default int	upcall(MemorySegment transbuf, MemorySegment meta, MemorySegment buffer, int type, MemorySegment data)	The upcall method is called from native code.

Method Details

run

boolean run(Buffer transbuf,
 Meta meta,
 Buffer buffer,
 Quark type,
 @Nullable MemorySegment data)

Function called for each meta in buffer as a result of performing a transformation on transbuf. Additional type specific transform data is passed to the function as data.

Implementations should check the type of the transform and parse additional type specific fields in data that should be used to update the metadata on transbuf.

Parameters:

transbuf - a GstBuffer

meta - a GstMeta

buffer - a GstBuffer

type - the transform type

data - transform specific data.

Returns:

true if the transform could be performed

upcall

default int upcall(MemorySegment transbuf,
 MemorySegment meta,
 MemorySegment buffer,
 int type,
 MemorySegment data)

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

toCallback

default MemorySegment toCallback(Arena arena)

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

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer