LXR linux/drivers/staging/media/atomisp/pci/isp/kernels/bnlm/ia_css_bnlm

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Support for Intel Camera Imaging ISP subsystem.
   4 * Copyright (c) 2015, Intel Corporation.
   5 *
   6 * This program is free software; you can redistribute it and/or modify it
   7 * under the terms and conditions of the GNU General Public License,
   8 * version 2, as published by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope it will be useful, but WITHOUT
  11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13 * more details.
  14 */
  15
  16#ifndef __IA_CSS_BNLM_TYPES_H
  17#define __IA_CSS_BNLM_TYPES_H
  18
  19/* @file
  20* CSS-API header file for Bayer Non-Linear Mean parameters.
  21*/
  22
  23#include "type_support.h" /* int32_t */
  24
  25/* Bayer Non-Linear Mean configuration
  26 *
  27 * \brief BNLM public parameters.
  28 * \details Struct with all parameters for the BNLM kernel that can be set
  29 * from the CSS API.
  30 *
  31 * ISP2.6.1: BNLM is used.
  32 */
  33struct ia_css_bnlm_config {
  34        bool            rad_enable;     /** Enable a radial dependency in a weight calculation */
  35        s32             rad_x_origin;   /** Initial x coordinate for a radius calculation */
  36        s32             rad_y_origin;   /** Initial x coordinate for a radius calculation */
  37        /* a threshold for average of weights if this < Th, do not denoise pixel */
  38        s32             avg_min_th;
  39        /* minimum weight for denoising if max < th, do not denoise pixel */
  40        s32             max_min_th;
  41
  42        /**@{*/
  43        /* Coefficient for approximation, in the form of (1 + x / N)^N,
  44         * that fits the first-order exp() to default exp_lut in BNLM sheet
  45         * */
  46        s32             exp_coeff_a;
  47        u32     exp_coeff_b;
  48        s32             exp_coeff_c;
  49        u32     exp_exponent;
  50        /**@}*/
  51
  52        s32 nl_th[3];   /** Detail thresholds */
  53
  54        /* Index for n-th maximum candidate weight for each detail group */
  55        s32 match_quality_max_idx[4];
  56
  57        /**@{*/
  58        /* A lookup table for 1/sqrt(1+mu) approximation */
  59        s32 mu_root_lut_thr[15];
  60        s32 mu_root_lut_val[16];
  61        /**@}*/
  62        /**@{*/
  63        /* A lookup table for SAD normalization */
  64        s32 sad_norm_lut_thr[15];
  65        s32 sad_norm_lut_val[16];
  66        /**@}*/
  67        /**@{*/
  68        /* A lookup table that models a weight's dependency on textures */
  69        s32 sig_detail_lut_thr[15];
  70        s32 sig_detail_lut_val[16];
  71        /**@}*/
  72        /**@{*/
  73        /* A lookup table that models a weight's dependency on a pixel's radial distance */
  74        s32 sig_rad_lut_thr[15];
  75        s32 sig_rad_lut_val[16];
  76        /**@}*/
  77        /**@{*/
  78        /* A lookup table to control denoise power depending on a pixel's radial distance */
  79        s32 rad_pow_lut_thr[15];
  80        s32 rad_pow_lut_val[16];
  81        /**@}*/
  82        /**@{*/
  83        /* Non linear transfer functions to calculate the blending coefficient depending on detail group */
  84        /* detail group 0 */
  85        /**@{*/
  86        s32 nl_0_lut_thr[15];
  87        s32 nl_0_lut_val[16];
  88        /**@}*/
  89        /**@{*/
  90        /* detail group 1 */
  91        s32 nl_1_lut_thr[15];
  92        s32 nl_1_lut_val[16];
  93        /**@}*/
  94        /**@{*/
  95        /* detail group 2 */
  96        s32 nl_2_lut_thr[15];
  97        s32 nl_2_lut_val[16];
  98        /**@}*/
  99        /**@{*/
 100        /* detail group 3 */
 101        s32 nl_3_lut_thr[15];
 102        s32 nl_3_lut_val[16];
 103        /**@}*/
 104        /**@}*/
 105};
 106
 107#endif /* __IA_CSS_BNLM_TYPES_H */
 108