Interface AppSink.PullPrerollCallback

All Superinterfaces:
FunctionPointer
Enclosing class:
AppSink
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public static interface AppSink.PullPrerollCallback extends FunctionPointer

Functional interface declaration of the PullPrerollCallback callback.

See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    Sample
    run()
    Get the last preroll sample in appsink. This was the sample that caused the appsink to preroll in the PAUSED state.
    default MemorySegment
    toCallback(Arena arena)
    Creates a native function pointer to the upcall(MemorySegment) method.
    default MemorySegment
    upcall(MemorySegment sourceAppSink)
    The upcall method is called from native code.

  • Method Details

    • run

      Sample run()

      Get the last preroll sample in appsink. This was the sample that caused the appsink to preroll in the PAUSED state.

      This function is typically used when dealing with a pipeline in the PAUSED state. Calling this function after doing a seek will give the sample right after the seek position.

      Calling this function will clear the internal reference to the preroll buffer.

      Note that the preroll sample will also be returned as the first sample when calling gst_app_sink_pull_sample() or the "pull-sample" action signal.

      If an EOS event was received before any buffers, this function returns null. Use gst_app_sink_is_eos () to check for the EOS condition.

      This function blocks until a preroll sample or EOS is received or the appsink element is set to the READY/NULL state.

    • upcall

      default MemorySegment upcall(MemorySegment sourceAppSink)
      The upcall method is called from native code. The parameters are marshaled and run() is executed.

    • toCallback

      default MemorySegment toCallback(Arena arena)
      Creates a native function pointer to the upcall(MemorySegment) method.
      Specified by:
      toCallback in interface FunctionPointer
      Parameters:
      arena - the arena in which the function pointer is allocated
      Returns:
      the native function pointer