c2cb9c2424
Added few checks to avoid out of bound access and and remove few redundant checks based on review. Bug:130279444 Test: atest android.media.cts.DecoderTestXheAac Test: atest android.media.cts.DecoderTestAacDrc Change-Id: If9a7917eea5d68d4c484d02fca4c755ffa6a9123
92 lines
3 KiB
C
92 lines
3 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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#include <stdio.h>
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#include <math.h>
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#include "impd_type_def.h"
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#include "impd_drc_extr_delta_coded_info.h"
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#include "impd_drc_common.h"
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#include "impd_drc_struct.h"
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#include "impd_drc_filter_bank.h"
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#include "impd_drc_rom.h"
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WORD32 impd_init_tbls(const WORD32 num_gain_max_values,
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ia_tables_struct* str_tables) {
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impd_gen_delta_time_code_tbl(num_gain_max_values,
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str_tables->delta_time_code_table);
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return (0);
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}
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void impd_get_delta_gain_code_tbl(
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const WORD32 gain_coding_profile,
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ia_delta_gain_code_table_struct const** delta_time_code_tbl,
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WORD32* num_entries) {
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if (gain_coding_profile == GAIN_CODING_PROFILE_CLIPPING) {
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*delta_time_code_tbl = ia_drc_gain_tbls_prof_2;
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*num_entries = NUM_GAIN_TBL_PROF_2_ENTRIES;
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} else {
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*delta_time_code_tbl = ia_drc_gain_tbls_prof_0_1;
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*num_entries = NUM_GAIN_TBL_PROF_0_1_ENTRIES;
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}
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}
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void impd_gen_delta_time_code_tbl(
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const WORD32 num_gain_max_values,
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ia_delta_time_code_table_entry_struct* delta_time_code_tbl_item) {
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WORD32 n, k;
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WORD32 Z = 1;
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while ((1 << Z) < 2 * num_gain_max_values) {
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Z++;
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}
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delta_time_code_tbl_item[0].size = -1;
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delta_time_code_tbl_item[0].code = -1;
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delta_time_code_tbl_item[0].value = -1;
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delta_time_code_tbl_item[1].size = 2;
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delta_time_code_tbl_item[1].code = 0x0;
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delta_time_code_tbl_item[1].value = 1;
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for (n = 0; n < 4; n++) {
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delta_time_code_tbl_item[n + 2].size = 4;
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delta_time_code_tbl_item[n + 2].code = 0x4 + n;
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delta_time_code_tbl_item[n + 2].value = n + 2;
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}
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for (n = 0; n < 8; n++) {
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delta_time_code_tbl_item[n + 6].size = 5;
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delta_time_code_tbl_item[n + 6].code = 0x10 + n;
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delta_time_code_tbl_item[n + 6].value = n + 6;
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}
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k = 2 * num_gain_max_values - 14 + 1;
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for (n = 0; n < k; n++) {
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delta_time_code_tbl_item[n + 14].size = 2 + Z;
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delta_time_code_tbl_item[n + 14].code = (0x3 << Z) + n;
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delta_time_code_tbl_item[n + 14].value = n + 14;
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}
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}
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WORD32
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impd_get_delta_tmin(const WORD32 sampling_rate) {
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WORD32 lowerBound = (WORD32)(0.5f + 0.0005f * sampling_rate);
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WORD32 result = 1;
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while (result <= lowerBound) result = result << 1;
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return result;
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}
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