Module uk.co.caprica.vlcj.natives
Package uk.co.caprica.vlcj.binding.internal

Interface libvlc_lock_callback_t

All Superinterfaces:
com.sun.jna.Callback
public interface libvlc_lock_callback_t extends com.sun.jna.Callback
Callback prototype to allocate and lock a picture buffer.

  • Nested Class Summary

    Nested classes/interfaces inherited from interface com.sun.jna.Callback

    com.sun.jna.Callback.UncaughtExceptionHandler

  • Field Summary

    Fields inherited from interface com.sun.jna.Callback

    FORBIDDEN_NAMES, METHOD_NAME

  • Method Summary

    Modifier and Type
    Method
    Description
    com.sun.jna.Pointer
    lock(com.sun.jna.Pointer opaque, com.sun.jna.ptr.PointerByReference planes)
    Callback prototype to allocate and lock a picture buffer.

  • Method Details

    • lock

      com.sun.jna.Pointer lock(com.sun.jna.Pointer opaque, com.sun.jna.ptr.PointerByReference planes)
      Callback prototype to allocate and lock a picture buffer.

      Whenever a new video frame needs to be decoded, the lock callback is invoked. Depending on the video chroma, one or three pixel planes of adequate dimensions must be returned via the second parameter. Those planes must be aligned on 32-bytes boundaries.

      Parameters:
      opaque - private pointer as passed to libvlc_video_set_callbacks() [IN]
      planes - start address of the pixel planes (LibVLC allocates the array of void pointers, this callback must initialize the array) [OUT]
      Returns:
      a private pointer for the display and unlock callbacks to identify the picture buffers