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 #include "ixheaacd_type_def.h"
21 #include "ixheaacd_bitbuffer.h"
22 #include "ixheaacd_cnst.h"
23 #include "ixheaacd_mps_aac_struct.h"
24 #include "ixheaacd_mps_res_rom.h"
25 #include "ixheaacd_basic_op.h"
26 #include "ixheaacd_mps_res.h"
27
ixheaacd_res_get_sfb_offsets(ia_mps_dec_residual_ics_info_struct * p_ics_info,ia_mps_dec_residual_aac_tables_struct * aac_tables_ptr)28 const WORD16 *ixheaacd_res_get_sfb_offsets(
29 ia_mps_dec_residual_ics_info_struct *p_ics_info,
30 ia_mps_dec_residual_aac_tables_struct *aac_tables_ptr) {
31 if (p_ics_info->window_sequence != EIGHT_SHORT_SEQUENCE) {
32 return aac_tables_ptr->sfb_index_long;
33 } else {
34 return aac_tables_ptr->sfb_index_short;
35 }
36 }
37
ixheaacd_res_get_sfb_width(ia_mps_dec_residual_ics_info_struct * p_ics_info,ia_mps_dec_residual_aac_tables_struct * aac_tables_ptr)38 const WORD8 *ixheaacd_res_get_sfb_width(ia_mps_dec_residual_ics_info_struct *p_ics_info,
39 ia_mps_dec_residual_aac_tables_struct *aac_tables_ptr) {
40 if (p_ics_info->window_sequence != EIGHT_SHORT_SEQUENCE) {
41 return aac_tables_ptr->sfb_index_long_width;
42 } else {
43 return aac_tables_ptr->sfb_index_short_width;
44 }
45 }
46
ixheaacd_res_ics_read(ia_bit_buf_struct * it_bif_buf,ia_mps_dec_residual_ics_info_struct * p_ics_info,WORD8 tot_sf_bands_ls[2])47 WORD16 ixheaacd_res_ics_read(ia_bit_buf_struct *it_bif_buf,
48 ia_mps_dec_residual_ics_info_struct *p_ics_info,
49 WORD8 tot_sf_bands_ls[2]) {
50 WORD i;
51 WORD mask;
52 WORD tmp = 0;
53
54 tmp = ixheaacd_read_bits_buf(it_bif_buf, 4);
55 p_ics_info->window_sequence = (WORD16)((tmp & 0x6) >> 1);
56
57 if (p_ics_info->window_sequence != EIGHT_SHORT_SEQUENCE) {
58 p_ics_info->total_sf_bands = tot_sf_bands_ls[0];
59
60 p_ics_info->window_groups = 1;
61 p_ics_info->window_group_length[0] = 1;
62
63 tmp = ixheaacd_read_bits_buf(it_bif_buf, 7);
64 p_ics_info->max_sf_bands = (tmp & 0x7E) >> 1;
65
66 if (tmp & 1) {
67 return (WORD16)((WORD32)AAC_DEC_PREDICTION_NOT_SUPPORTED_IN_LC_AAC);
68 }
69 } else {
70 WORD32 win_grp = 0, tmp2;
71 p_ics_info->total_sf_bands = tot_sf_bands_ls[1];
72
73 tmp = ixheaacd_read_bits_buf(it_bif_buf, 11);
74 p_ics_info->max_sf_bands = (tmp & 0x780) >> 7;
75
76 tmp2 = (tmp & 0x7F);
77
78 for (i = 0; i < 7; i++) {
79 mask = (1 << sub_d(6, i));
80 p_ics_info->window_group_length[i] = 1;
81 if (tmp2 & mask) {
82 p_ics_info->window_group_length[win_grp] =
83 add_d(p_ics_info->window_group_length[win_grp], 1);
84 } else {
85 win_grp = add_d(win_grp, 1);
86 }
87 }
88
89 p_ics_info->window_group_length[7] = 1;
90 p_ics_info->window_groups = add_d(win_grp, 1);
91 }
92
93 if (p_ics_info->max_sf_bands > p_ics_info->total_sf_bands)
94 return (WORD16)IA_XHEAAC_DEC_EXE_NONFATAL_EXCEEDS_SFB_TRANSMITTED;
95
96 return AAC_DEC_OK;
97 }
98