1 /****************************************************************************** 2 * * 3 * Copyright (C) 2023 The Android Open Source Project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ***************************************************************************** 18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore 19 */ 20 21 #pragma once 22 extern const FLOAT32 impd_drc_downmix_coeff[16]; 23 extern const FLOAT32 impd_drc_downmix_coeff_lfe[16]; 24 extern const FLOAT32 impd_drc_channel_weight[16]; 25 extern const FLOAT32 impd_drc_downmix_coeff_v1[32]; 26 extern const FLOAT32 impd_drc_eq_slope_table[16]; 27 extern const FLOAT32 impd_drc_eq_gain_delta_table[32]; 28 extern const FLOAT32 impd_drc_zero_pole_radius_table[128]; 29 extern const FLOAT32 impd_drc_zero_pole_angle_table[128]; 30 31 typedef struct { 32 WORD32 size; 33 WORD32 code; 34 WORD32 value; 35 } ia_drc_delta_time_code_table_entry_struct; 36 37 typedef struct { 38 WORD32 size; 39 WORD32 code; 40 FLOAT32 value; 41 WORD32 index; 42 } ia_drc_slope_code_table_entry_struct; 43 44 typedef struct { 45 WORD32 size; 46 WORD32 code; 47 FLOAT32 value; 48 } ia_drc_delta_gain_code_entry_struct; 49 50 VOID impd_drc_generate_delta_time_code_table( 51 const WORD32 num_gain_values_max, 52 ia_drc_delta_time_code_table_entry_struct *delta_time_code_table_item); 53 54 VOID impd_drc_get_delta_gain_code_table( 55 const WORD32 gain_coding_profile, 56 ia_drc_delta_gain_code_entry_struct const **pstr_delta_gain_code_table, WORD32 *num_entries); 57 58 const ia_drc_slope_code_table_entry_struct *impd_drc_get_slope_code_table_by_value(VOID); 59 60 FLOAT32 impd_drc_decode_slope_idx_value(const WORD32 slope_code_index); 61 62 FLOAT32 impd_drc_decode_slope_idx_magnitude(const WORD32 slope_code_index); 63