/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Support for Intel Camera Imaging ISP subsystem.
 * Copyright (c) 2015, Intel Corporation.
 */

#ifndef __IA_CSS_BNLM_TYPES_H
#define __IA_CSS_BNLM_TYPES_H

/* @file
* CSS-API header file for Bayer Non-Linear Mean parameters.
*/

#include "type_support.h" /* int32_t */

/* Bayer Non-Linear Mean configuration
 *
 * \brief BNLM public parameters.
 * \details Struct with all parameters for the BNLM kernel that can be set
 * from the CSS API.
 *
 * ISP2.6.1: BNLM is used.
 */
struct ia_css_bnlm_config {
        bool            rad_enable;     /** Enable a radial dependency in a weight calculation */
        s32             rad_x_origin;   /** Initial x coordinate for a radius calculation */
        s32             rad_y_origin;   /** Initial x coordinate for a radius calculation */
        /* a threshold for average of weights if this < Th, do not denoise pixel */
        s32             avg_min_th;
        /* minimum weight for denoising if max < th, do not denoise pixel */
        s32             max_min_th;

        /**@{*/
        /* Coefficient for approximation, in the form of (1 + x / N)^N,
         * that fits the first-order exp() to default exp_lut in BNLM sheet
         * */
        s32             exp_coeff_a;
        u32     exp_coeff_b;
        s32             exp_coeff_c;
        u32     exp_exponent;
        /**@}*/

        s32 nl_th[3];   /** Detail thresholds */

        /* Index for n-th maximum candidate weight for each detail group */
        s32 match_quality_max_idx[4];

        /**@{*/
        /* A lookup table for 1/sqrt(1+mu) approximation */
        s32 mu_root_lut_thr[15];
        s32 mu_root_lut_val[16];
        /**@}*/
        /**@{*/
        /* A lookup table for SAD normalization */
        s32 sad_norm_lut_thr[15];
        s32 sad_norm_lut_val[16];
        /**@}*/
        /**@{*/
        /* A lookup table that models a weight's dependency on textures */
        s32 sig_detail_lut_thr[15];
        s32 sig_detail_lut_val[16];
        /**@}*/
        /**@{*/
        /* A lookup table that models a weight's dependency on a pixel's radial distance */
        s32 sig_rad_lut_thr[15];
        s32 sig_rad_lut_val[16];
        /**@}*/
        /**@{*/
        /* A lookup table to control denoise power depending on a pixel's radial distance */
        s32 rad_pow_lut_thr[15];
        s32 rad_pow_lut_val[16];
        /**@}*/
        /**@{*/
        /* Non linear transfer functions to calculate the blending coefficient depending on detail group */
        /* detail group 0 */
        /**@{*/
        s32 nl_0_lut_thr[15];
        s32 nl_0_lut_val[16];
        /**@}*/
        /**@{*/
        /* detail group 1 */
        s32 nl_1_lut_thr[15];
        s32 nl_1_lut_val[16];
        /**@}*/
        /**@{*/
        /* detail group 2 */
        s32 nl_2_lut_thr[15];
        s32 nl_2_lut_val[16];
        /**@}*/
        /**@{*/
        /* detail group 3 */
        s32 nl_3_lut_thr[15];
        s32 nl_3_lut_val[16];
        /**@}*/
        /**@}*/
};

#endif /* __IA_CSS_BNLM_TYPES_H */