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22e0099ac9
The sh_mobile_ceu_camera driver implements a generic algorithm for setting up an optimal client and host scaling and cropping configuration. This patch makes those functions available for all drivers. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/*
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* soc-camera generic scaling-cropping manipulation functions
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*
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* Copyright (C) 2013 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef SOC_SCALE_CROP_H
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#define SOC_SCALE_CROP_H
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#include <linux/kernel.h>
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struct soc_camera_device;
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struct v4l2_crop;
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struct v4l2_mbus_framefmt;
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struct v4l2_pix_format;
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struct v4l2_rect;
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struct v4l2_subdev;
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static inline unsigned int soc_camera_shift_scale(unsigned int size,
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unsigned int shift, unsigned int scale)
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{
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return DIV_ROUND_CLOSEST(size << shift, scale);
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}
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#define soc_camera_calc_scale(in, shift, out) soc_camera_shift_scale(in, shift, out)
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int soc_camera_client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect);
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int soc_camera_client_s_crop(struct v4l2_subdev *sd,
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struct v4l2_crop *crop, struct v4l2_crop *cam_crop,
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struct v4l2_rect *target_rect, struct v4l2_rect *subrect);
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int soc_camera_client_scale(struct soc_camera_device *icd,
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struct v4l2_rect *rect, struct v4l2_rect *subrect,
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struct v4l2_mbus_framefmt *mf,
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unsigned int *width, unsigned int *height,
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bool host_can_scale, unsigned int shift);
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void soc_camera_calc_client_output(struct soc_camera_device *icd,
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struct v4l2_rect *rect, struct v4l2_rect *subrect,
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const struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf,
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unsigned int shift);
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#endif
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