Package org.freedesktop.gstreamer.gst

Interface BufferForeachMetaFunc

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("io.github.jwharm.JavaGI")
public interface BufferForeachMetaFunc
extends FunctionPointer

Functional interface declaration of the BufferForeachMetaFunc callback.

See Also:

• run(org.freedesktop.gstreamer.gst.Buffer, io.github.jwharm.javagi.base.Out<org.freedesktop.gstreamer.gst.Meta>)

Method Summary

Modifier and Type	Method	Description
boolean	run(Buffer buffer, @Nullable Out<Meta> meta)	A function that will be called from gst_buffer_foreach_meta().
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
default int	upcall(MemorySegment buffer, MemorySegment meta, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

boolean run(Buffer buffer,
 @Nullable
 @Nullable Out<Meta> meta)

A function that will be called from gst_buffer_foreach_meta(). The meta field will point to a the reference of the meta.

buffer should not be modified from this callback.

When this function returns true, the next meta will be returned. When false is returned, gst_buffer_foreach_meta() will return.

When meta is set to null, the item will be removed from the buffer.

upcall

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

The upcall method is called from native code. The parameters are marshaled and run(org.freedesktop.gstreamer.gst.Buffer, io.github.jwharm.javagi.base.Out<org.freedesktop.gstreamer.gst.Meta>) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

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

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the function pointer will be allocated in this arena

Returns:

the native function pointer