1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/******************************************************************************
* *
* Copyright (C) 2023 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 <string.h>
#include "ixheaac_type_def.h"
#include "ixheaac_constants.h"
#include "ixheaace_aac_constants.h"
#include "ixheaac_basic_ops32.h"
#include "ixheaac_basic_ops16.h"
#include "ixheaac_basic_ops40.h"
#include "ixheaac_basic_ops.h"
#include "ixheaac_error_standards.h"
#include "ixheaace_sbr_header.h"
#include "ixheaace_sbr_def.h"
#include "ixheaace_resampler.h"
#include "ixheaace_sbr_rom.h"
#include "ixheaace_common_rom.h"
#include "ixheaace_sbr_main.h"
#include "ixheaace_sbr_frame_info_gen.h"
#include "ixheaace_sbr_hbe.h"
#include "ixheaace_sbr_code_envelope.h"
#include "ixheaace_sbr_qmf_enc.h"
#include "ixheaace_sbr_tran_det.h"
#include "ixheaace_sbr_env_est.h"
#include "ixheaace_sbr_missing_harmonics_det.h"
#include "ixheaace_sbr_inv_filtering_estimation.h"
#include "ixheaace_sbr_noise_floor_est.h"
#include "ixheaace_sbr_ton_corr.h"
#include "iusace_esbr_pvc.h"
#include "iusace_esbr_inter_tes.h"
#include "ixheaace_sbr.h"
#include "ixheaace_common_utils.h"
static WORD32 ixheaace_index_low2_high(WORD32 offset, WORD32 index, ixheaace_freq_res res) {
switch (res) {
case FREQ_RES_LOW:
if (offset >= 0) {
return (index < offset) ? (index) : (2 * index - offset);
} else {
offset = -offset;
return (index < offset) ? (3 * index) : (2 * index + offset);
}
default:
return (index);
}
}
IA_ERRORCODE ixheaace_code_envelope(WORD32 *ptr_sfb_energy, const ixheaace_freq_res *freq_res,
ixheaace_str_sbr_code_envelope *pstr_code_env,
WORD32 *ptr_dir_vec, WORD32 coupling, WORD32 num_envelopes,
WORD32 channel, WORD32 header_active, WORD32 usac_indep_flag,
WORD32 is_ld_sbr) {
IA_ERRORCODE err_code = IA_NO_ERROR;
WORD32 i, no_of_bands, band, last_nrg, current_energy;
WORD32 *ptr_energy;
WORD32 code_book_scf_lav_lvl_time;
WORD32 code_book_scf_lav_lvl_freq;
WORD32 code_book_scf_lav_bal_time;
WORD32 code_book_scf_lav_bal_freq;
const UWORD8 *ptr_huff_tab_lvl_time_l;
const UWORD8 *ptr_huff_tab_bal_time_l;
const UWORD8 *ptr_huff_tab_lvl_freq_l;
const UWORD8 *ptr_huff_tab_bal_freq_l;
WORD32 offset = pstr_code_env->offset;
WORD32 env_data_tab_comp_factor;
WORD32 delta_f_bits = 0, delta_t_bits = 0;
WORD32 use_dt;
WORD32 delta_f[MAXIMUM_FREQ_COEFFS];
WORD32 delta_t[MAXIMUM_FREQ_COEFFS];
FLOAT32 df_edge_first_ennv;
df_edge_first_ennv = pstr_code_env->df_edge_1st_env +
pstr_code_env->df_edge_incr * pstr_code_env->df_edge_incr_fac;
switch (coupling) {
case COUPLING_1:
code_book_scf_lav_lvl_time = pstr_code_env->code_book_scf_lav_lvl_time;
code_book_scf_lav_lvl_freq = pstr_code_env->code_book_scf_lav_lvl_freq;
code_book_scf_lav_bal_time = pstr_code_env->code_book_scf_lav_bal_time;
code_book_scf_lav_bal_freq = pstr_code_env->code_book_scf_lav_bal_freq;
ptr_huff_tab_lvl_time_l = pstr_code_env->ptr_huff_tab_lvl_time_l;
ptr_huff_tab_bal_time_l = pstr_code_env->ptr_huff_tab_bal_time_l;
ptr_huff_tab_lvl_freq_l = pstr_code_env->ptr_huff_tab_lvl_freq_l;
ptr_huff_tab_bal_freq_l = pstr_code_env->ptr_huff_tab_bal_freq_l;
break;
default:
code_book_scf_lav_lvl_time = pstr_code_env->code_book_scf_lav_time;
code_book_scf_lav_lvl_freq = pstr_code_env->code_book_scf_lav_freq;
code_book_scf_lav_bal_time = pstr_code_env->code_book_scf_lav_time;
code_book_scf_lav_bal_freq = pstr_code_env->code_book_scf_lav_freq;
ptr_huff_tab_lvl_time_l = pstr_code_env->ptr_huff_tab_time_l;
ptr_huff_tab_bal_time_l = pstr_code_env->ptr_huff_tab_time_l;
ptr_huff_tab_lvl_freq_l = pstr_code_env->ptr_huff_tab_freq_l;
ptr_huff_tab_bal_freq_l = pstr_code_env->ptr_huff_tab_freq_l;
}
if (coupling == 1 && channel == 1) {
env_data_tab_comp_factor = 1;
} else {
env_data_tab_comp_factor = 0;
}
if (pstr_code_env->delta_t_across_frames == 0 || header_active) {
pstr_code_env->update = 0;
}
for (i = 0; i < num_envelopes; i++) {
if (freq_res[i] == FREQ_RES_HIGH)
no_of_bands = pstr_code_env->num_scf[FREQ_RES_HIGH];
else
no_of_bands = pstr_code_env->num_scf[FREQ_RES_LOW];
ptr_energy = ptr_sfb_energy;
current_energy = *ptr_energy;
delta_f[0] = ixheaac_shr32(current_energy, env_data_tab_comp_factor);
if (coupling && channel == 1)
delta_f_bits = pstr_code_env->start_bits_balance;
else
delta_f_bits = pstr_code_env->start_bits;
if (pstr_code_env->update != 0) {
delta_t[0] = ixheaac_shr32((current_energy - pstr_code_env->sfb_nrg_prev[0]),
env_data_tab_comp_factor);
err_code = ixheaace_compute_bits(delta_t[0], code_book_scf_lav_lvl_time,
code_book_scf_lav_bal_time, ptr_huff_tab_lvl_time_l,
ptr_huff_tab_bal_time_l, coupling, channel, &delta_t_bits);
if (err_code) {
return err_code;
}
}
ixheaace_map_low_res_energy_value(current_energy, pstr_code_env->sfb_nrg_prev, offset, 0,
freq_res[i]);
band = no_of_bands - 1;
while (band > 0) {
if (ptr_energy[band] - ptr_energy[band - 1] > code_book_scf_lav_lvl_freq) {
ptr_energy[band - 1] = ptr_energy[band] - code_book_scf_lav_lvl_freq;
}
band--;
}
band = 1;
while (band < no_of_bands) {
WORD32 index;
WORD32 delta_lcl_bits = 0;
if (ixheaac_sub32_sat(ptr_energy[band - 1], ptr_energy[band]) >
code_book_scf_lav_lvl_freq) {
ptr_energy[band] = ptr_energy[band - 1] - code_book_scf_lav_lvl_freq;
}
last_nrg = *ptr_energy++;
current_energy = *ptr_energy;
delta_f[band] = ixheaac_shr32((current_energy - last_nrg), env_data_tab_comp_factor);
err_code = ixheaace_compute_bits(
delta_f[band], code_book_scf_lav_lvl_freq, code_book_scf_lav_bal_freq,
ptr_huff_tab_lvl_freq_l, ptr_huff_tab_bal_freq_l, coupling, channel, &delta_lcl_bits);
if (err_code) {
return err_code;
}
delta_f_bits += delta_lcl_bits;
if (pstr_code_env->update != 0) {
delta_lcl_bits = 0;
index = ixheaace_index_low2_high(offset, band, freq_res[i]);
delta_t[band] = current_energy - pstr_code_env->sfb_nrg_prev[index];
delta_t[band] = ixheaac_shr32(delta_t[band], env_data_tab_comp_factor);
ixheaace_map_low_res_energy_value(current_energy, pstr_code_env->sfb_nrg_prev, offset,
band, freq_res[i]);
if ((delta_t[band] > 31) || (delta_t[band] < -31)) {
delta_t[band] = 31;
}
err_code = ixheaace_compute_bits(
delta_t[band], code_book_scf_lav_lvl_time, code_book_scf_lav_bal_time,
ptr_huff_tab_lvl_time_l, ptr_huff_tab_bal_time_l, coupling, channel, &delta_lcl_bits);
if (err_code) {
return err_code;
}
delta_t_bits += delta_lcl_bits;
} else {
ixheaace_map_low_res_energy_value(current_energy, pstr_code_env->sfb_nrg_prev, offset,
band, freq_res[i]);
}
band++;
}
if (i == 0) {
use_dt = (pstr_code_env->update != 0 &&
(delta_f_bits > delta_t_bits * (1 + df_edge_first_ennv)));
} else if (is_ld_sbr) {
use_dt = ((pstr_code_env->update != 0) && (delta_f_bits > delta_t_bits));
} else {
use_dt = (delta_f_bits > delta_t_bits);
}
if (use_dt) {
ptr_dir_vec[i] = TIME;
memcpy(ptr_sfb_energy, delta_t, no_of_bands * sizeof(ptr_sfb_energy[0]));
} else {
ptr_dir_vec[i] = FREQ;
memcpy(ptr_sfb_energy, delta_f, no_of_bands * sizeof(ptr_sfb_energy[0]));
}
if (0 == i && 1 == usac_indep_flag) {
ptr_dir_vec[i] = FREQ;
memcpy(ptr_sfb_energy, delta_f, no_of_bands * sizeof(ptr_sfb_energy[0]));
}
ptr_sfb_energy += no_of_bands;
pstr_code_env->update = 1;
}
return err_code;
}
|
