text: /*
   * 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"
  #if CONFIG_OPENCL
  #include "libavutil/opencl.h"
  #endif
  
  
  enum SearchMethod {
      EXHAUSTIVE,        ///< Search all possible positions
      SMART_EXHAUSTIVE,  ///< Search most possible positions (faster)
      SEARCH_COUNT
  };
  
  typedef struct {
      int x;             ///< Horizontal shift
      int y;             ///< Vertical shift
  } IntMotionVector;
  
  typedef struct {
      double x;             ///< Horizontal shift
      double y;             ///< Vertical shift
  } MotionVector;
  
  typedef struct {
      MotionVector vec;     ///< Motion vector
      double angle;         ///< Angle of rotation
      double zoom;          ///< Zoom percentage
  } Transform;
  
  #if CONFIG_OPENCL
  
  typedef struct {
      cl_command_queue command_queue;
      cl_program program;
      cl_kernel kernel_luma;
      cl_kernel kernel_chroma;
      int in_plane_size[8];
      int out_plane_size[8];
      int plane_num;
      cl_mem cl_inbuf;
      size_t cl_inbuf_size;
      cl_mem cl_outbuf;
      size_t cl_outbuf_size;
  } DeshakeOpenclContext;
  
  #endif
  
  #define MAX_R 64
  
  typedef struct {
      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;
  #if CONFIG_OPENCL
      DeshakeOpenclContext opencl_ctx;
  #endif
      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 */
  