PadActivateFunction (java-gi API)

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 PadActivateFunction extends FunctionPointer

Functional interface declaration of the PadActivateFunction callback.

See Also:

Method Summary

Modifier and Type

Method

Description

boolean

run(Pad pad, GstObject parent)

This function is called when the pad is activated during the element READY to PAUSED state change.

default MemorySegment

toCallback(Arena arena)

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

default int

upcall(MemorySegment pad, MemorySegment parent)

The upcall method is called from native code.

Method Details
- run
  
  boolean run(Pad pad, GstObject parent)
  
  This function is called when the pad is activated during the element READY to PAUSED state change. By default this function will call the activate function that puts the pad in push mode but elements can override this function to activate the pad in pull mode if they wish.
- upcall
  
  default int upcall(MemorySegment pad, MemorySegment parent)
  
  The upcall method is called from native code. The parameters are marshaled and run(org.freedesktop.gstreamer.gst.Pad, org.freedesktop.gstreamer.gst.GstObject) is executed.
- toCallback
  
  default MemorySegment toCallback(Arena arena)
  
  Creates a native function pointer to the upcall(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