drivers/media/platform/soc_camera/soc_scale_crop.h

   1 /*
   2  * soc-camera generic scaling-cropping manipulation functions
   3  *
   4  * Copyright (C) 2013 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #ifndef SOC_SCALE_CROP_H
  13 #define SOC_SCALE_CROP_H
  14
  15 #include <linux/kernel.h>
  16
  17 struct soc_camera_device;
  18
  19 struct v4l2_selection;
  20 struct v4l2_mbus_framefmt;
  21 struct v4l2_pix_format;
  22 struct v4l2_rect;
  23 struct v4l2_subdev;
  24
  25 static inline unsigned int soc_camera_shift_scale(unsigned int size,
  26                                 unsigned int shift, unsigned int scale)
  27 {
  28         return DIV_ROUND_CLOSEST(size << shift, scale);
  29 }
  30
  31 #define soc_camera_calc_scale(in, shift, out) soc_camera_shift_scale(in, shift, out)
  32
  33 int soc_camera_client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect);
  34 int soc_camera_client_s_selection(struct v4l2_subdev *sd,
  35                         struct v4l2_selection *sel, struct v4l2_selection *cam_sel,
  36                         struct v4l2_rect *target_rect, struct v4l2_rect *subrect);
  37 int soc_camera_client_scale(struct soc_camera_device *icd,
  38                         struct v4l2_rect *rect, struct v4l2_rect *subrect,
  39                         struct v4l2_mbus_framefmt *mf,
  40                         unsigned int *width, unsigned int *height,
  41                         bool host_can_scale, unsigned int shift);
  42 void soc_camera_calc_client_output(struct soc_camera_device *icd,
  43                 struct v4l2_rect *rect, struct v4l2_rect *subrect,
  44                 const struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf,
  45                 unsigned int shift);
  46
  47 #endif