| /****************************************************************************** |
| * |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ***************************************************************************** |
| * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore |
| */ |
| #include <stdio.h> |
| #include <math.h> |
| |
| #include "impd_type_def.h" |
| #include "impd_drc_extr_delta_coded_info.h" |
| #include "impd_drc_common.h" |
| #include "impd_drc_struct.h" |
| #include "impd_drc_filter_bank.h" |
| #include "impd_drc_rom.h" |
| |
| VOID impd_init_tbls(const WORD32 num_gain_max_values, |
| ia_tables_struct* str_tables) { |
| impd_gen_delta_time_code_tbl(num_gain_max_values, |
| str_tables->delta_time_code_table); |
| return; |
| } |
| |
| void impd_get_delta_gain_code_tbl( |
| const WORD32 gain_coding_profile, |
| ia_delta_gain_code_table_struct const** delta_time_code_tbl, |
| WORD32* num_entries) { |
| if (gain_coding_profile == GAIN_CODING_PROFILE_CLIPPING) { |
| *delta_time_code_tbl = ia_drc_gain_tbls_prof_2; |
| *num_entries = NUM_GAIN_TBL_PROF_2_ENTRIES; |
| } else { |
| *delta_time_code_tbl = ia_drc_gain_tbls_prof_0_1; |
| *num_entries = NUM_GAIN_TBL_PROF_0_1_ENTRIES; |
| } |
| } |
| |
| void impd_gen_delta_time_code_tbl( |
| const WORD32 num_gain_max_values, |
| ia_delta_time_code_table_entry_struct* delta_time_code_tbl_item) { |
| WORD32 n, k; |
| |
| WORD32 Z = 1; |
| while ((1 << Z) < 2 * num_gain_max_values) { |
| Z++; |
| } |
| |
| delta_time_code_tbl_item[0].size = -1; |
| delta_time_code_tbl_item[0].code = -1; |
| delta_time_code_tbl_item[0].value = -1; |
| |
| delta_time_code_tbl_item[1].size = 2; |
| delta_time_code_tbl_item[1].code = 0x0; |
| delta_time_code_tbl_item[1].value = 1; |
| for (n = 0; n < 4; n++) { |
| delta_time_code_tbl_item[n + 2].size = 4; |
| delta_time_code_tbl_item[n + 2].code = 0x4 + n; |
| delta_time_code_tbl_item[n + 2].value = n + 2; |
| } |
| for (n = 0; n < 8; n++) { |
| delta_time_code_tbl_item[n + 6].size = 5; |
| delta_time_code_tbl_item[n + 6].code = 0x10 + n; |
| delta_time_code_tbl_item[n + 6].value = n + 6; |
| } |
| |
| k = 2 * num_gain_max_values - 14 + 1; |
| for (n = 0; n < k; n++) { |
| delta_time_code_tbl_item[n + 14].size = 2 + Z; |
| delta_time_code_tbl_item[n + 14].code = (0x3 << Z) + n; |
| delta_time_code_tbl_item[n + 14].value = n + 14; |
| } |
| } |
| |
| WORD32 |
| impd_get_delta_tmin(const WORD32 sampling_rate) { |
| WORD32 lowerBound = (WORD32)(0.5f + 0.0005f * sampling_rate); |
| WORD32 result = 1; |
| while (result <= lowerBound) result = result << 1; |
| return result; |
| } |