/* Copyright 2022-2025 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: AMD * */ #include "shaper_builder.h" #include "custom_fp16.h" #include "fixed31_32.h" #include "color.h" #include "color_gamma.h" struct shaper_setup_out { int exp_begin_raw; int exp_end_raw; int begin_custom_1_6_12; int end_custom_0_6_10; int end_base_fixed_0_14; }; static unsigned int vpe_computer_shaper_pq_14u(double x, struct fixed31_32 normalized_factor) { unsigned output_fixpt_14u = 0x3fff; struct fixed31_32 x_fixpt = vpe_fixpt_one; struct fixed31_32 output_fixpt; if (x < 1.0) { // Convert double -> fixpt31_32 x_fixpt.value = vpe_double_to_fixed_point(x, (unsigned long long)0, (unsigned long long)32, true); // Linear -> PQ vpe_compute_pq(x_fixpt, &output_fixpt); // PQ -> Normalized PQ output_fixpt = vpe_fixpt_div(output_fixpt, normalized_factor); // fixpt31_32 -> fixpt14u output_fixpt_14u = vpe_fixpt_clamp_u0d14(output_fixpt); } return output_fixpt_14u; // Max 14u Value } static bool calculate_shaper_properties_const_hdr_mult( const struct vpe_shaper_setup_in *shaper_in, struct shaper_setup_out *shaper_out) { double x; struct vpe_custom_float_format2 fmt; struct vpe_custom_float_value2 custom_float; int num_exp; bool ret = false; int isize = 1 << 14; double divider = isize - 1; double x_double_begin; double multiplyer = shaper_in->source_luminance / 10000.0 * shaper_in->shaper_in_max; fmt.flags.Uint = 0; fmt.flags.bits.sign = 1; fmt.mantissaBits = 12; fmt.exponentaBits = 6; x = pow(1.0 / divider, 2.2) * multiplyer; if (!vpe_convert_to_custom_float_ex_generic(x, &fmt, &custom_float)) goto release; shaper_out->exp_begin_raw = custom_float.exponenta; if (!vpe_from_1_6_12_to_double(false, custom_float.exponenta, 0, &x_double_begin)) goto release; if (!vpe_convert_to_custom_float_generic( x_double_begin, &fmt, &shaper_out->begin_custom_1_6_12)) goto release; fmt.flags.bits.sign = 0; fmt.mantissaBits = 10; if (!vpe_convert_to_custom_float_ex_generic(multiplyer, &fmt, &custom_float)) goto release; shaper_out->exp_end_raw = custom_float.exponenta; if (!vpe_convert_to_custom_float_generic(multiplyer, &fmt, &shaper_out->end_custom_0_6_10)) goto release; shaper_out->end_base_fixed_0_14 = isize - 1; num_exp = shaper_out->exp_end_raw - shaper_out->exp_begin_raw + 1; if (num_exp > 34) goto release; ret = true; release: return ret; } static bool calculate_shaper_properties_variable_hdr_mult( const struct vpe_shaper_setup_in *shaper_in, struct shaper_setup_out *shaper_out) { struct vpe_custom_float_format2 fmt; struct vpe_custom_float_value2 custom_float; int num_exp; bool ret = false; int isize = 1 << 14; double divider = isize - 1; double x_double_begin = 0; fmt.flags.Uint = 0; fmt.exponentaBits = 6; fmt.mantissaBits = 10; if (!vpe_convert_to_custom_float_ex_generic(shaper_in->shaper_in_max, &fmt, &custom_float)) goto release; if (!vpe_convert_to_custom_float_generic( shaper_in->shaper_in_max, &fmt, &shaper_out->end_custom_0_6_10)) goto release; shaper_out->exp_end_raw = custom_float.exponenta; shaper_out->exp_begin_raw = shaper_out->exp_end_raw - 33; shaper_out->end_base_fixed_0_14 = isize - 1; if (!vpe_from_1_6_12_to_double(false, shaper_out->exp_begin_raw, 0, &x_double_begin)) goto release; fmt.mantissaBits = 12; fmt.flags.bits.sign = 1; if (!vpe_convert_to_custom_float_generic( x_double_begin, &fmt, &shaper_out->begin_custom_1_6_12)) goto release; num_exp = shaper_out->exp_end_raw - shaper_out->exp_begin_raw + 1; if (num_exp > 34) goto release; ret = true; release: return ret; } static int build_shaper_2_2_segments_distribution(int num_regions, int *arr_segments) { int i; int counter; int num_segments = 0; int num_segments_total = 0; const int proposed_2_2_distribution[] = {5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; int proposed_regions = ARRAY_SIZE(proposed_2_2_distribution); if (proposed_regions < num_regions) goto release; counter = 0; for (i = num_regions - 1; i >= 0; i--) { arr_segments[counter] = proposed_2_2_distribution[i]; num_segments += 1 << proposed_2_2_distribution[i]; counter++; } release: return num_segments; } enum vpe_status vpe_build_shaper(const struct vpe_shaper_setup_in *shaper_in, enum color_transfer_func shaper_tf, struct fixed31_32 pq_norm_gain, struct pwl_params *shaper_out) { enum vpe_status ret = VPE_STATUS_ERROR; int num_points = 0; int arr_regions[34]; struct shaper_setup_out shaper_params; int i, j; int num_exp; unsigned int exp; double x, delta_segments; int lut_counter = 0; int segments_current; int segments_offset; unsigned int decimalBits = 14; unsigned int mask = (1 << decimalBits) - 1; double d_norm = mask; double divider = shaper_in->shaper_in_max; unsigned int output_fixpt_14u; struct fixed31_32 normalized_factor = vpe_fixpt_one; if (shaper_tf == TRANSFER_FUNC_NORMALIZED_PQ) { struct fixed31_32 normalized_gain = vpe_fixpt_one; normalized_gain = vpe_fixpt_div_int(pq_norm_gain, HDR_PEAK_WHITE); vpe_compute_pq(normalized_gain, &normalized_factor); } if (shaper_in->use_const_hdr_mult && !calculate_shaper_properties_const_hdr_mult(shaper_in, &shaper_params)) goto release; else if (!calculate_shaper_properties_variable_hdr_mult(shaper_in, &shaper_params)) goto release; exp = shaper_params.exp_begin_raw; num_exp = shaper_params.exp_end_raw - shaper_params.exp_begin_raw + 1; num_points = build_shaper_2_2_segments_distribution(num_exp, arr_regions); segments_offset = 0; for (i = 0; i < num_exp; i++) { segments_current = 1 << arr_regions[i]; shaper_out->arr_curve_points[i].segments_num = arr_regions[i]; shaper_out->arr_curve_points[i].offset = segments_offset; segments_offset = segments_offset + segments_current; if (!vpe_from_1_6_12_to_double(false, exp, 0, &x)) goto release; x /= divider; delta_segments = x / segments_current; for (j = 0; j < segments_current; j++) { switch (shaper_tf) { case TRANSFER_FUNC_NORMALIZED_PQ: if (i > 2) { output_fixpt_14u = vpe_computer_shaper_pq_14u(x, normalized_factor); } else { output_fixpt_14u = vpe_to_fixed_point(decimalBits, x, mask, d_norm); } break; case TRANSFER_FUNC_LINEAR: default: output_fixpt_14u = vpe_to_fixed_point(decimalBits, x, mask, d_norm); break; } shaper_out->rgb_resulted[lut_counter].red_reg = output_fixpt_14u; shaper_out->rgb_resulted[lut_counter].green_reg = shaper_out->rgb_resulted[lut_counter].red_reg; shaper_out->rgb_resulted[lut_counter].blue_reg = shaper_out->rgb_resulted[lut_counter].red_reg; x += delta_segments; lut_counter++; } exp++; } shaper_out->corner_points[0].red.custom_float_x = shaper_params.begin_custom_1_6_12; shaper_out->corner_points[0].green.custom_float_x = shaper_out->corner_points[0].red.custom_float_x; shaper_out->corner_points[0].blue.custom_float_x = shaper_out->corner_points[0].red.custom_float_x; shaper_out->corner_points[1].red.custom_float_x = shaper_params.end_custom_0_6_10; shaper_out->corner_points[1].green.custom_float_x = shaper_out->corner_points[1].red.custom_float_x; shaper_out->corner_points[1].blue.custom_float_x = shaper_out->corner_points[1].red.custom_float_x; shaper_out->corner_points[1].red.custom_float_y = shaper_params.end_base_fixed_0_14; shaper_out->corner_points[1].green.custom_float_y = shaper_out->corner_points[1].red.custom_float_y; shaper_out->corner_points[1].blue.custom_float_y = shaper_out->corner_points[1].red.custom_float_y; for (i = 1; i < num_points; i++) { shaper_out->rgb_resulted[i - 1].delta_red_reg = shaper_out->rgb_resulted[i].red_reg - shaper_out->rgb_resulted[i - 1].red_reg; shaper_out->rgb_resulted[i - 1].delta_green_reg = shaper_out->rgb_resulted[i - 1].delta_red_reg; shaper_out->rgb_resulted[i - 1].delta_blue_reg = shaper_out->rgb_resulted[i - 1].delta_red_reg; } shaper_out->hw_points_num = num_points; ret = VPE_STATUS_OK; release: return ret; }