libvlc_lock_callback_t (vlcj-natives 4.0.0 API)

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

All Methods Instance Methods Abstract Methods
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 Detail
  - 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