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/******************************************************************************
*
* 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;
}
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