1/******************************************************************************
2 *
3 * Copyright (C) 2018 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#include <stdio.h>
21#include <math.h>
22
23#include "impd_type_def.h"
24#include "impd_drc_extr_delta_coded_info.h"
25#include "impd_drc_common.h"
26#include "impd_drc_struct.h"
27#include "impd_drc_filter_bank.h"
28#include "impd_drc_rom.h"
29
30WORD32 impd_init_tbls(const WORD32 num_gain_max_values,
31                      ia_tables_struct* str_tables) {
32  impd_gen_delta_time_code_tbl(num_gain_max_values,
33                               str_tables->delta_time_code_table);
34  return (0);
35}
36
37void impd_get_delta_gain_code_tbl(
38    const WORD32 gain_coding_profile,
39    ia_delta_gain_code_table_struct const** delta_time_code_tbl,
40    WORD32* num_entries) {
41  if (gain_coding_profile == GAIN_CODING_PROFILE_CLIPPING) {
42    *delta_time_code_tbl = ia_drc_gain_tbls_prof_2;
43    *num_entries = NUM_GAIN_TBL_PROF_2_ENTRIES;
44  } else {
45    *delta_time_code_tbl = ia_drc_gain_tbls_prof_0_1;
46    *num_entries = NUM_GAIN_TBL_PROF_0_1_ENTRIES;
47  }
48}
49
50void impd_gen_delta_time_code_tbl(
51    const WORD32 num_gain_max_values,
52    ia_delta_time_code_table_entry_struct* delta_time_code_tbl_item) {
53  WORD32 n, k;
54
55  WORD32 Z = 1;
56  while ((1 << Z) < 2 * num_gain_max_values) {
57    Z++;
58  }
59
60  delta_time_code_tbl_item[0].size = -1;
61  delta_time_code_tbl_item[0].code = -1;
62  delta_time_code_tbl_item[0].value = -1;
63
64  delta_time_code_tbl_item[1].size = 2;
65  delta_time_code_tbl_item[1].code = 0x0;
66  delta_time_code_tbl_item[1].value = 1;
67  for (n = 0; n < 4; n++) {
68    delta_time_code_tbl_item[n + 2].size = 4;
69    delta_time_code_tbl_item[n + 2].code = 0x4 + n;
70    delta_time_code_tbl_item[n + 2].value = n + 2;
71  }
72  for (n = 0; n < 8; n++) {
73    delta_time_code_tbl_item[n + 6].size = 5;
74    delta_time_code_tbl_item[n + 6].code = 0x10 + n;
75    delta_time_code_tbl_item[n + 6].value = n + 6;
76  }
77
78  k = 2 * num_gain_max_values - 14 + 1;
79  for (n = 0; n < k; n++) {
80    delta_time_code_tbl_item[n + 14].size = 2 + Z;
81    delta_time_code_tbl_item[n + 14].code = (0x3 << Z) + n;
82    delta_time_code_tbl_item[n + 14].value = n + 14;
83  }
84}
85
86WORD32
87impd_get_delta_tmin(const WORD32 sampling_rate) {
88  WORD32 lowerBound = (WORD32)(0.5f + 0.0005f * sampling_rate);
89  WORD32 result = 1;
90  if (sampling_rate < 1000) {
91    return (UNEXPECTED_ERROR);
92  }
93  while (result <= lowerBound) result = result << 1;
94  return result;
95}
96