2 * Support for Intel Camera Imaging ISP subsystem.
3 * Copyright (c) 2015, Intel Corporation.
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.
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
15 #include "type_support.h"
16 #include "ia_css_bnlm.host.h"
18 #ifndef IA_CSS_NO_DEBUG
19 #include "ia_css_debug.h" /* ia_css_debug_dtrace() */
21 #include <assert_support.h>
23 #define BNLM_DIV_LUT_SIZE (12)
24 static const int32_t div_lut_nearests[BNLM_DIV_LUT_SIZE] = {
25 0, 454, 948, 1484, 2070, 2710, 3412, 4184, 5035, 5978, 7025, 8191
28 static const int32_t div_lut_slopes[BNLM_DIV_LUT_SIZE] = {
29 -7760, -6960, -6216, -5536, -4912, -4344, -3832, -3360, -2936, -2552, -2208, -2208
32 static const int32_t div_lut_intercepts[BNLM_DIV_LUT_SIZE] = {
33 8184, 7752, 7336, 6928, 6536, 6152, 5776, 5416, 5064, 4728, 4408, 4408
36 /* Encodes a look-up table from BNLM public parameters to vmem parameters.
38 * lut : bnlm_lut struct containing encoded vmem parameters look-up table
39 * lut_thr : array containing threshold values for lut
40 * lut_val : array containing output values related to lut_thr
41 * lut_size: Size of lut_val array
44 bnlm_lut_encode(struct bnlm_lut *lut, const int32_t *lut_thr, const int32_t *lut_val, const uint32_t lut_size)
47 const u32 block_size = 16;
48 const u32 total_blocks = ISP_VEC_NELEMS / block_size;
50 /* Create VMEM LUTs from the threshold and value arrays.
52 * Min size of the LUT is 2 entries.
54 * Max size of the LUT is 16 entries, so that the LUT can fit into a
55 * single group of 16 elements inside a vector.
56 * Then these elements are copied into other groups inside the same
57 * vector. If the LUT size is less than 16, then remaining elements are
60 assert((lut_size >= 2) && (lut_size <= block_size));
61 /* array lut_thr has (lut_size-1) entries */
62 for (i = 0; i < lut_size-2; i++) {
63 /* Check if the lut_thr is monotonically increasing */
64 assert(lut_thr[i] <= lut_thr[i+1]);
68 for (i = 0; i < total_blocks * block_size; i++) {
74 for (i = 0; i < lut_size - 1; i++) {
75 lut->thr[0][i] = lut_thr[i];
76 lut->val[0][i] = lut_val[i];
78 lut->val[0][i] = lut_val[i]; /* val has one more element than thr */
80 /* Copy data from first block to all blocks */
81 for (blk = 1; blk < total_blocks; blk++) {
82 u32 blk_offset = blk * block_size;
83 for (i = 1; i < lut_size; i++) {
84 lut->thr[0][blk_offset + i] = lut->thr[0][i];
85 lut->val[0][blk_offset + i] = lut->val[0][i];
91 * - Encodes BNLM public parameters into VMEM parameters
92 * - Generates VMEM parameters which will needed internally ISP
95 ia_css_bnlm_vmem_encode(
96 struct bnlm_vmem_params *to,
97 const struct ia_css_bnlm_config *from,
103 /* Initialize LUTs in VMEM parameters */
104 bnlm_lut_encode(&to->mu_root_lut, from->mu_root_lut_thr, from->mu_root_lut_val, 16);
105 bnlm_lut_encode(&to->sad_norm_lut, from->sad_norm_lut_thr, from->sad_norm_lut_val, 16);
106 bnlm_lut_encode(&to->sig_detail_lut, from->sig_detail_lut_thr, from->sig_detail_lut_val, 16);
107 bnlm_lut_encode(&to->sig_rad_lut, from->sig_rad_lut_thr, from->sig_rad_lut_val, 16);
108 bnlm_lut_encode(&to->rad_pow_lut, from->rad_pow_lut_thr, from->rad_pow_lut_val, 16);
109 bnlm_lut_encode(&to->nl_0_lut, from->nl_0_lut_thr, from->nl_0_lut_val, 16);
110 bnlm_lut_encode(&to->nl_1_lut, from->nl_1_lut_thr, from->nl_1_lut_val, 16);
111 bnlm_lut_encode(&to->nl_2_lut, from->nl_2_lut_thr, from->nl_2_lut_val, 16);
112 bnlm_lut_encode(&to->nl_3_lut, from->nl_3_lut_thr, from->nl_3_lut_val, 16);
114 /* Initialize arrays in VMEM parameters */
115 memset(to->nl_th, 0, sizeof(to->nl_th));
116 to->nl_th[0][0] = from->nl_th[0];
117 to->nl_th[0][1] = from->nl_th[1];
118 to->nl_th[0][2] = from->nl_th[2];
120 memset(to->match_quality_max_idx, 0, sizeof(to->match_quality_max_idx));
121 to->match_quality_max_idx[0][0] = from->match_quality_max_idx[0];
122 to->match_quality_max_idx[0][1] = from->match_quality_max_idx[1];
123 to->match_quality_max_idx[0][2] = from->match_quality_max_idx[2];
124 to->match_quality_max_idx[0][3] = from->match_quality_max_idx[3];
126 bnlm_lut_encode(&to->div_lut, div_lut_nearests, div_lut_slopes, BNLM_DIV_LUT_SIZE);
127 memset(to->div_lut_intercepts, 0, sizeof(to->div_lut_intercepts));
128 for(i = 0; i < BNLM_DIV_LUT_SIZE; i++) {
129 to->div_lut_intercepts[0][i] = div_lut_intercepts[i];
132 memset(to->power_of_2, 0, sizeof(to->power_of_2));
133 for (i = 0; i < (ISP_VEC_ELEMBITS-1); i++) {
134 to->power_of_2[0][i] = 1 << i;
138 /* - Encodes BNLM public parameters into DMEM parameters */
141 struct bnlm_dmem_params *to,
142 const struct ia_css_bnlm_config *from,
146 to->rad_enable = from->rad_enable;
147 to->rad_x_origin = from->rad_x_origin;
148 to->rad_y_origin = from->rad_y_origin;
149 to->avg_min_th = from->avg_min_th;
150 to->max_min_th = from->max_min_th;
152 to->exp_coeff_a = from->exp_coeff_a;
153 to->exp_coeff_b = from->exp_coeff_b;
154 to->exp_coeff_c = from->exp_coeff_c;
155 to->exp_exponent = from->exp_exponent;
158 /* Prints debug traces for BNLM public parameters */
160 ia_css_bnlm_debug_trace(
161 const struct ia_css_bnlm_config *config,
167 #ifndef IA_CSS_NO_DEBUG
168 ia_css_debug_dtrace(level, "BNLM:\n");
169 ia_css_debug_dtrace(level, "\t%-32s = %d\n", "rad_enable", config->rad_enable);
170 ia_css_debug_dtrace(level, "\t%-32s = %d\n", "rad_x_origin", config->rad_x_origin);
171 ia_css_debug_dtrace(level, "\t%-32s = %d\n", "rad_y_origin", config->rad_y_origin);
172 ia_css_debug_dtrace(level, "\t%-32s = %d\n", "avg_min_th", config->avg_min_th);
173 ia_css_debug_dtrace(level, "\t%-32s = %d\n", "max_min_th", config->max_min_th);
175 ia_css_debug_dtrace(level, "\t%-32s = %d\n", "exp_coeff_a", config->exp_coeff_a);
176 ia_css_debug_dtrace(level, "\t%-32s = %d\n", "exp_coeff_b", config->exp_coeff_b);
177 ia_css_debug_dtrace(level, "\t%-32s = %d\n", "exp_coeff_c", config->exp_coeff_c);
178 ia_css_debug_dtrace(level, "\t%-32s = %d\n", "exp_exponent", config->exp_exponent);
180 /* ToDo: print traces for LUTs */
181 #endif /* IA_CSS_NO_DEBUG */