Interface PadActivateFunction

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 PadActivateFunction extends FunctionPointer

Functional interface declaration of the PadActivateFunction callback.

See Also:

  • 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.
      Parameters:
      pad - a GstPad
      parent - the parent of pad
      Returns:
      true if the pad could be activated.

    • upcall

      default int upcall(MemorySegment pad, MemorySegment parent)
      The upcall method is called from native code. The parameters are marshaled and run(Pad, GstObject) is executed.

    • toCallback

      default MemorySegment toCallback(Arena arena)
      Creates a native function pointer to the upcall(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