/*
  * Copyright (C) 2013 Wei Gao <weigao@multicorewareinc.com>

  * Copyright (C) 2013 Lenny Wang

  *
  * 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 AVFILTER_DESHAKE_H
 #define AVFILTER_DESHAKE_H
 
 #include "config.h"
 #include "avfilter.h"
 #include "transform.h"

 #include "libavutil/pixelutils.h"

 
 
 enum SearchMethod {
     EXHAUSTIVE,        ///< Search all possible positions
     SMART_EXHAUSTIVE,  ///< Search most possible positions (faster)
     SEARCH_COUNT
 };
 

 typedef struct IntMotionVector {

     int x;             ///< Horizontal shift
     int y;             ///< Vertical shift
 } IntMotionVector;
 

 typedef struct MotionVector {

     double x;             ///< Horizontal shift
     double y;             ///< Vertical shift
 } MotionVector;
 

 typedef struct Transform {

     MotionVector vec;     ///< Motion vector

     double angle;         ///< Angle of rotation
     double zoom;          ///< Zoom percentage
 } Transform;
 

 #define MAX_R 64
 

 typedef struct DeshakeContext {

     const AVClass *class;

     int counts[2*MAX_R+1][2*MAX_R+1]; /// < Scratch buffer for motion search

     double *angles;            ///< Scratch buffer for block angles
     unsigned angles_size;

     AVFrame *ref;              ///< Previous frame
     int rx;                    ///< Maximum horizontal shift
     int ry;                    ///< Maximum vertical shift
     int edge;                  ///< Edge fill method
     int blocksize;             ///< Size of blocks to compare
     int contrast;              ///< Contrast threshold
     int search;                ///< Motion search method

     av_pixelutils_sad_fn sad;  ///< Sum of the absolute difference function

     Transform last;            ///< Transform from last frame
     int refcount;              ///< Number of reference frames (defines averaging window)
     FILE *fp;
     Transform avg;
     int cw;                    ///< Crop motion search to this box
     int ch;
     int cx;
     int cy;
     char *filename;            ///< Motion search detailed log filename
     int opencl;
     int (* transform)(AVFilterContext *ctx, int width, int height, int cw, int ch,
                       const float *matrix_y, const float *matrix_uv, enum InterpolateMethod interpolate,
                       enum FillMethod fill, AVFrame *in, AVFrame *out);
 } DeshakeContext;
 
 #endif /* AVFILTER_DESHAKE_H */