/*
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #ifndef AVUTIL_MOTION_VECTOR_H
 #define AVUTIL_MOTION_VECTOR_H
 
 #include <stdint.h>
 
 typedef struct AVMotionVector {
     /**
      * Where the current macroblock comes from; negative value when it comes
      * from the past, positive value when it comes from the future.
      * XXX: set exact relative ref frame reference instead of a +/- 1 "direction".
      */
     int32_t source;
     /**
      * Width and height of the block.
      */
     uint8_t w, h;
     /**

      * Absolute source position. Can be outside the frame area.

      */

     int16_t src_x, src_y;

     /**

      * Absolute destination position. Can be outside the frame area.

      */

     int16_t dst_x, dst_y;

     /**
      * Extra flag information.
      * Currently unused.
      */
     uint64_t flags;

     /**
      * Motion vector
      * src_x = dst_x + motion_x / motion_scale
      * src_y = dst_y + motion_y / motion_scale
      */
     int32_t motion_x, motion_y;
     uint16_t motion_scale;

 } AVMotionVector;
 
 #endif /* AVUTIL_MOTION_VECTOR_H */