Interface PadQueryFunction

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 PadQueryFunction
extends FunctionPointer

Functional interface declaration of the PadQueryFunction callback.

See Also:

• run(Pad, GstObject, Query)

Method Summary

Modifier and Type	Method	Description
boolean	run(Pad pad, @Nullable GstObject parent, Query query)	The signature of the query function.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(MemorySegment, MemorySegment, MemorySegment) method.
default int	upcall(MemorySegment pad, MemorySegment parent, MemorySegment query)	The upcall method is called from native code.

Method Details

run

boolean run(Pad pad,
 @Nullable GstObject parent,
 Query query)

The signature of the query function.

Parameters:

pad - the GstPad to query.

parent - the parent of pad. If the GST_PAD_FLAG_NEED_PARENT flag is set, parent is guaranteed to be not-null and remain valid during the execution of this function.

query - the GstQuery object to execute

Returns:

true if the query could be performed.

upcall

default int upcall(MemorySegment pad,
 MemorySegment parent,
 MemorySegment query)

The upcall method is called from native code. The parameters are marshaled and run(Pad, GstObject, Query) 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