LXR linux/drivers/media/platform/soc_camera/soc_scale

   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
  17struct soc_camera_device;
  18
  19struct v4l2_crop;
  20struct v4l2_mbus_framefmt;
  21struct v4l2_pix_format;
  22struct v4l2_rect;
  23struct v4l2_subdev;
  24
  25static 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
  33int soc_camera_client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect);
  34int soc_camera_client_s_crop(struct v4l2_subdev *sd,
  35                        struct v4l2_crop *crop, struct v4l2_crop *cam_crop,
  36                        struct v4l2_rect *target_rect, struct v4l2_rect *subrect);
  37int 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);
  42void 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
  48