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/*
* Support for Intel Camera Imaging ISP subsystem.
* Copyright (c) 2015, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include "type_support.h"
#include "ia_css_bnlm.host.h"
#ifndef IA_CSS_NO_DEBUG
#include "ia_css_debug.h" /* ia_css_debug_dtrace() */
#endif
#include <assert_support.h>
#define BNLM_DIV_LUT_SIZE (12)
static const s32 div_lut_nearests[BNLM_DIV_LUT_SIZE] = {
0, 454, 948, 1484, 2070, 2710, 3412, 4184, 5035, 5978, 7025, 8191
};
static const s32 div_lut_slopes[BNLM_DIV_LUT_SIZE] = {
-7760, -6960, -6216, -5536, -4912, -4344, -3832, -3360, -2936, -2552, -2208, -2208
};
static const s32 div_lut_intercepts[BNLM_DIV_LUT_SIZE] = {
8184, 7752, 7336, 6928, 6536, 6152, 5776, 5416, 5064, 4728, 4408, 4408
};
/* Encodes a look-up table from BNLM public parameters to vmem parameters.
* Input:
* lut : bnlm_lut struct containing encoded vmem parameters look-up table
* lut_thr : array containing threshold values for lut
* lut_val : array containing output values related to lut_thr
* lut_size: Size of lut_val array
*/
static inline void
bnlm_lut_encode(struct bnlm_lut *lut, const int32_t *lut_thr,
const int32_t *lut_val, const uint32_t lut_size)
{
u32 blk, i;
const u32 block_size = 16;
const u32 total_blocks = ISP_VEC_NELEMS / block_size;
/* Create VMEM LUTs from the threshold and value arrays.
*
* Min size of the LUT is 2 entries.
*
* Max size of the LUT is 16 entries, so that the LUT can fit into a
* single group of 16 elements inside a vector.
* Then these elements are copied into other groups inside the same
* vector. If the LUT size is less than 16, then remaining elements are
* set to 0.
*/
assert((lut_size >= 2) && (lut_size <= block_size));
/* array lut_thr has (lut_size-1) entries */
for (i = 0; i < lut_size - 2; i++) {
/* Check if the lut_thr is monotonically increasing */
assert(lut_thr[i] <= lut_thr[i + 1]);
}
/* Initialize */
for (i = 0; i < total_blocks * block_size; i++) {
lut->thr[0][i] = 0;
lut->val[0][i] = 0;
}
/* Copy all data */
for (i = 0; i < lut_size - 1; i++) {
lut->thr[0][i] = lut_thr[i];
lut->val[0][i] = lut_val[i];
}
lut->val[0][i] = lut_val[i]; /* val has one more element than thr */
/* Copy data from first block to all blocks */
for (blk = 1; blk < total_blocks; blk++) {
u32 blk_offset = blk * block_size;
for (i = 1; i < lut_size; i++) {
lut->thr[0][blk_offset + i] = lut->thr[0][i];
lut->val[0][blk_offset + i] = lut->val[0][i];
}
}
}
/*
* - Encodes BNLM public parameters into VMEM parameters
* - Generates VMEM parameters which will needed internally ISP
*/
void
ia_css_bnlm_vmem_encode(
struct bnlm_vmem_params *to,
const struct ia_css_bnlm_config *from,
size_t size)
{
int i;
(void)size;
/* Initialize LUTs in VMEM parameters */
bnlm_lut_encode(&to->mu_root_lut, from->mu_root_lut_thr, from->mu_root_lut_val,
16);
bnlm_lut_encode(&to->sad_norm_lut, from->sad_norm_lut_thr,
from->sad_norm_lut_val, 16);
bnlm_lut_encode(&to->sig_detail_lut, from->sig_detail_lut_thr,
from->sig_detail_lut_val, 16);
bnlm_lut_encode(&to->sig_rad_lut, from->sig_rad_lut_thr, from->sig_rad_lut_val,
16);
bnlm_lut_encode(&to->rad_pow_lut, from->rad_pow_lut_thr, from->rad_pow_lut_val,
16);
bnlm_lut_encode(&to->nl_0_lut, from->nl_0_lut_thr, from->nl_0_lut_val, 16);
bnlm_lut_encode(&to->nl_1_lut, from->nl_1_lut_thr, from->nl_1_lut_val, 16);
bnlm_lut_encode(&to->nl_2_lut, from->nl_2_lut_thr, from->nl_2_lut_val, 16);
bnlm_lut_encode(&to->nl_3_lut, from->nl_3_lut_thr, from->nl_3_lut_val, 16);
/* Initialize arrays in VMEM parameters */
memset(to->nl_th, 0, sizeof(to->nl_th));
to->nl_th[0][0] = from->nl_th[0];
to->nl_th[0][1] = from->nl_th[1];
to->nl_th[0][2] = from->nl_th[2];
memset(to->match_quality_max_idx, 0, sizeof(to->match_quality_max_idx));
to->match_quality_max_idx[0][0] = from->match_quality_max_idx[0];
to->match_quality_max_idx[0][1] = from->match_quality_max_idx[1];
to->match_quality_max_idx[0][2] = from->match_quality_max_idx[2];
to->match_quality_max_idx[0][3] = from->match_quality_max_idx[3];
bnlm_lut_encode(&to->div_lut, div_lut_nearests, div_lut_slopes,
BNLM_DIV_LUT_SIZE);
memset(to->div_lut_intercepts, 0, sizeof(to->div_lut_intercepts));
for (i = 0; i < BNLM_DIV_LUT_SIZE; i++) {
to->div_lut_intercepts[0][i] = div_lut_intercepts[i];
}
memset(to->power_of_2, 0, sizeof(to->power_of_2));
for (i = 0; i < (ISP_VEC_ELEMBITS - 1); i++) {
to->power_of_2[0][i] = 1 << i;
}
}
/* - Encodes BNLM public parameters into DMEM parameters */
void
ia_css_bnlm_encode(
struct bnlm_dmem_params *to,
const struct ia_css_bnlm_config *from,
size_t size)
{
(void)size;
to->rad_enable = from->rad_enable;
to->rad_x_origin = from->rad_x_origin;
to->rad_y_origin = from->rad_y_origin;
to->avg_min_th = from->avg_min_th;
to->max_min_th = from->max_min_th;
to->exp_coeff_a = from->exp_coeff_a;
to->exp_coeff_b = from->exp_coeff_b;
to->exp_coeff_c = from->exp_coeff_c;
to->exp_exponent = from->exp_exponent;
}
/* Prints debug traces for BNLM public parameters */
void
ia_css_bnlm_debug_trace(
const struct ia_css_bnlm_config *config,
unsigned int level)
{
if (!config)
return;
#ifndef IA_CSS_NO_DEBUG
ia_css_debug_dtrace(level, "BNLM:\n");
ia_css_debug_dtrace(level, "\t%-32s = %d\n", "rad_enable", config->rad_enable);
ia_css_debug_dtrace(level, "\t%-32s = %d\n", "rad_x_origin",
config->rad_x_origin);
ia_css_debug_dtrace(level, "\t%-32s = %d\n", "rad_y_origin",
config->rad_y_origin);
ia_css_debug_dtrace(level, "\t%-32s = %d\n", "avg_min_th", config->avg_min_th);
ia_css_debug_dtrace(level, "\t%-32s = %d\n", "max_min_th", config->max_min_th);
ia_css_debug_dtrace(level, "\t%-32s = %d\n", "exp_coeff_a",
config->exp_coeff_a);
ia_css_debug_dtrace(level, "\t%-32s = %d\n", "exp_coeff_b",
config->exp_coeff_b);
ia_css_debug_dtrace(level, "\t%-32s = %d\n", "exp_coeff_c",
config->exp_coeff_c);
ia_css_debug_dtrace(level, "\t%-32s = %d\n", "exp_exponent",
config->exp_exponent);
/* ToDo: print traces for LUTs */
#endif /* IA_CSS_NO_DEBUG */
}
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