1 /* 2 * Support for Intel Camera Imaging ISP subsystem. 3 * Copyright (c) 2015, Intel Corporation. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 */ 14 15 #ifndef __IA_CSS_XNR3_TYPES_H 16 #define __IA_CSS_XNR3_TYPES_H 17 18 /* @file 19 * CSS-API header file for Extra Noise Reduction (XNR) parameters. 20 */ 21 22 /** 23 * \brief Scale of the XNR sigma parameters. 24 * \details The define specifies which fixed-point value represents 1.0. 25 */ 26 #define IA_CSS_XNR3_SIGMA_SCALE BIT(10) 27 28 /** 29 * \brief Scale of the XNR coring parameters. 30 * \details The define specifies which fixed-point value represents 1.0. 31 */ 32 #define IA_CSS_XNR3_CORING_SCALE BIT(15) 33 34 /** 35 * \brief Scale of the XNR blending parameter. 36 * \details The define specifies which fixed-point value represents 1.0. 37 */ 38 #define IA_CSS_XNR3_BLENDING_SCALE BIT(11) 39 40 /** 41 * \brief XNR3 Sigma Parameters. 42 * \details Sigma parameters define the strength of the XNR filter. 43 * A higher number means stronger filtering. There are two values for each of 44 * the three YUV planes: one for dark areas and one for bright areas. All 45 * sigma parameters are fixed-point values between 0.0 and 1.0, scaled with 46 * IA_CSS_XNR3_SIGMA_SCALE. 47 */ 48 struct ia_css_xnr3_sigma_params { 49 int y0; /** Sigma for Y range similarity in dark area */ 50 int y1; /** Sigma for Y range similarity in bright area */ 51 int u0; /** Sigma for U range similarity in dark area */ 52 int u1; /** Sigma for U range similarity in bright area */ 53 int v0; /** Sigma for V range similarity in dark area */ 54 int v1; /** Sigma for V range similarity in bright area */ 55 }; 56 57 /** 58 * \brief XNR3 Coring Parameters 59 * \details Coring parameters define the "coring" strength, which is a soft 60 * thresholding technique to avoid false coloring. There are two values for 61 * each of the two chroma planes: one for dark areas and one for bright areas. 62 * All coring parameters are fixed-point values between 0.0 and 1.0, scaled 63 * with IA_CSS_XNR3_CORING_SCALE. The ineffective value is 0. 64 */ 65 struct ia_css_xnr3_coring_params { 66 int u0; /** Coring threshold of U channel in dark area */ 67 int u1; /** Coring threshold of U channel in bright area */ 68 int v0; /** Coring threshold of V channel in dark area */ 69 int v1; /** Coring threshold of V channel in bright area */ 70 }; 71 72 /** 73 * \brief XNR3 Blending Parameters 74 * \details Blending parameters define the blending strength of filtered 75 * output pixels with the original chroma pixels from before xnr3. The 76 * blending strength is a fixed-point value between 0.0 and 1.0 (inclusive), 77 * scaled with IA_CSS_XNR3_BLENDING_SCALE. 78 * A higher number applies xnr filtering more strongly. A value of 1.0 79 * disables the blending and returns the xnr3 filtered output, while a 80 * value of 0.0 bypasses the entire xnr3 filter. 81 */ 82 struct ia_css_xnr3_blending_params { 83 int strength; /** Blending strength */ 84 }; 85 86 /** 87 * \brief XNR3 public parameters. 88 * \details Struct with all parameters for the XNR3 kernel that can be set 89 * from the CSS API. 90 */ 91 struct ia_css_xnr3_config { 92 struct ia_css_xnr3_sigma_params sigma; /** XNR3 sigma parameters */ 93 struct ia_css_xnr3_coring_params coring; /** XNR3 coring parameters */ 94 struct ia_css_xnr3_blending_params blending; /** XNR3 blending parameters */ 95 }; 96 97 #endif /* __IA_CSS_XNR3_TYPES_H */ 98