1/* SPDX-License-Identifier: GPL-2.0 */ 2/** 3Support for Intel Camera Imaging ISP subsystem. 4Copyright (c) 2010 - 2015, Intel Corporation. 5 6This program is free software; you can redistribute it and/or modify it 7under the terms and conditions of the GNU General Public License, 8version 2, as published by the Free Software Foundation. 9 10This program is distributed in the hope it will be useful, but WITHOUT 11ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13more details. 14*/ 15 16#ifndef _IA_CSS_TNR3_TYPES_H 17#define _IA_CSS_TNR3_TYPES_H 18 19/* @file 20* CSS-API header file for Temporal Noise Reduction v3 (TNR3) kernel 21*/ 22 23/** 24 * \brief Number of piecewise linear segments. 25 * \details The parameters to TNR3 are specified as a piecewise linear segment. 26 * The number of such segments is fixed at 3. 27 */ 28#define TNR3_NUM_SEGMENTS 3 29 30/* Temporal Noise Reduction v3 (TNR3) configuration. 31 * The parameter to this kernel is fourfold 32 * 1. Three piecewise linear graphs (one for each plane) with three segments 33 * each. Each line graph has Luma values on the x axis and sigma values for 34 * each plane on the y axis. The three linear segments may have a different 35 * slope and the point of Luma value which where the slope may change is called 36 * a "Knee" point. As there are three such segments, four points need to be 37 * specified each on the Luma axis and the per plane Sigma axis. On the Luma 38 * axis two points are fixed (namely 0 and maximum luma value - depending on 39 * ISP bit depth). The other two points are the points where the slope may 40 * change its value. These two points are called knee points. The four points on 41 * the per plane sigma axis are also specified at the interface. 42 * 2. One rounding adjustment parameter for each plane 43 * 3. One maximum feedback threshold value for each plane 44 * 4. Selection of the reference frame buffer to be used for noise reduction. 45 */ 46struct ia_css_tnr3_kernel_config { 47 unsigned int maxfb_y; /** Maximum Feedback Gain for Y */ 48 unsigned int maxfb_u; /** Maximum Feedback Gain for U */ 49 unsigned int maxfb_v; /** Maximum Feedback Gain for V */ 50 unsigned int round_adj_y; /** Rounding Adjust for Y */ 51 unsigned int round_adj_u; /** Rounding Adjust for U */ 52 unsigned int round_adj_v; /** Rounding Adjust for V */ 53 unsigned int knee_y[TNR3_NUM_SEGMENTS - 1]; /** Knee points */ 54 unsigned int sigma_y[TNR3_NUM_SEGMENTS + 55 1]; /** Standard deviation for Y at points Y0, Y1, Y2, Y3 */ 56 unsigned int sigma_u[TNR3_NUM_SEGMENTS + 57 1]; /** Standard deviation for U at points U0, U1, U2, U3 */ 58 unsigned int sigma_v[TNR3_NUM_SEGMENTS + 59 1]; /** Standard deviation for V at points V0, V1, V2, V3 */ 60 unsigned int 61 ref_buf_select; /** Selection of the reference buffer */ 62}; 63 64#endif 65