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 <string.h>
21 #include "ixheaacd_type_def.h"
22 
23 #include "ixheaacd_sbr_common.h"
24 
25 #include "ixheaacd_constants.h"
26 #include "ixheaacd_basic_ops32.h"
27 #include "ixheaacd_basic_ops16.h"
28 #include "ixheaacd_basic_ops40.h"
29 #include "ixheaacd_basic_ops.h"
30 #include "ixheaacd_bitbuffer.h"
31 
32 #include "ixheaacd_basic_op.h"
33 #include "ixheaacd_intrinsics.h"
34 
35 #include "ixheaacd_defines.h"
36 
37 #include "ixheaacd_aac_rom.h"
38 
39 #include "ixheaacd_definitions.h"
40 
41 #include "ixheaacd_error_codes.h"
42 
43 #include "ixheaacd_pulsedata.h"
44 
45 #include "ixheaacd_pns.h"
46 #include "ixheaacd_drc_data_struct.h"
47 
48 #include "ixheaacd_lt_predict.h"
49 
50 #include "ixheaacd_channelinfo.h"
51 #include "ixheaacd_drc_dec.h"
52 
53 #include "ixheaacd_sbrdecoder.h"
54 #include "ixheaacd_block.h"
55 #include "ixheaacd_channel.h"
56 
57 #include "ixheaacd_sbr_payload.h"
58 #include "ixheaacd_common_rom.h"
59 #include "ixheaacd_sbrdecsettings.h"
60 #include "ixheaacd_sbr_scale.h"
61 #include "ixheaacd_env_extr_part.h"
62 #include "ixheaacd_sbr_rom.h"
63 
64 #include "ixheaacd_lpp_tran.h"
65 #include "ixheaacd_hybrid.h"
66 #include "ixheaacd_ps_dec.h"
67 
68 #include "ixheaacd_env_extr.h"
69 #include "ixheaacd_adts.h"
70 #include "ixheaacd_audioobjtypes.h"
71 #include "ixheaacd_memory_standards.h"
72 
73 #include "ixheaacd_latmdemux.h"
74 
75 #include "ixheaacd_aacdec.h"
76 #include "ixheaacd_mps_polyphase.h"
77 #include "ixheaacd_config.h"
78 #include "ixheaacd_mps_dec.h"
79 
80 #include "ixheaacd_struct_def.h"
81 
82 #include "ixheaacd_multichannel.h"
83 
84 #define ALIGN_SIZE64(x) ((((x) + 7) >> 3) << 3)
85 
ixheaacd_set_aac_persistent_buffers(VOID * aac_persistent_mem_v,WORD32 num_channel)86 WORD32 ixheaacd_set_aac_persistent_buffers(VOID *aac_persistent_mem_v,
87                                            WORD32 num_channel) {
88   WORD32 persistent_used;
89 
90   struct ia_aac_persistent_struct *aac_persistent_mem =
91       (struct ia_aac_persistent_struct *)aac_persistent_mem_v;
92 
93   persistent_used = sizeof(struct ia_aac_persistent_struct);
94 
95   memset(aac_persistent_mem, 0, sizeof(struct ia_aac_persistent_struct));
96   aac_persistent_mem->overlap_buffer =
97       (WORD32 *)((WORD8 *)aac_persistent_mem_v + persistent_used);
98 
99   memset((WORD32 *)((WORD8 *)aac_persistent_mem_v + persistent_used), 0,
100          4 * 512 * num_channel * sizeof(WORD32));
101 
102   persistent_used += 4 * 512 * num_channel * sizeof(WORD32);
103 
104   aac_persistent_mem->sbr_payload_buffer =
105       (WORD8 *)((WORD8 *)aac_persistent_mem_v + persistent_used);
106 
107   memset((WORD16 *)((WORD8 *)aac_persistent_mem_v + persistent_used), 0,
108          ALIGN_SIZE64(MAXSBRBYTES) * num_channel * sizeof(WORD8));
109 
110   persistent_used += ALIGN_SIZE64(MAXSBRBYTES) * num_channel * sizeof(WORD8);
111 
112   {
113     WORD32 i;
114 
115     for (i = 0; i < num_channel; i++) {
116       aac_persistent_mem->ltp_buf[i] =
117           (WORD16 *)((WORD8 *)aac_persistent_mem_v + persistent_used);
118 
119       memset((WORD16 *)((WORD8 *)aac_persistent_mem_v + persistent_used), 0,
120              ltp_buffer_size * sizeof(WORD16));
121 
122       persistent_used += (ltp_buffer_size * sizeof(WORD16));
123 
124       aac_persistent_mem->ptr_aac_dec_static_channel_info[i] =
125           (ia_aac_dec_channel_info *)((WORD8 *)aac_persistent_mem_v +
126                                       persistent_used);
127       persistent_used += sizeof(ia_aac_dec_channel_info);
128 
129       aac_persistent_mem->ptr_aac_dec_static_channel_info[i]
130           ->overlap_add_data.win_shape = 0;
131       aac_persistent_mem->ptr_aac_dec_static_channel_info[i]
132           ->overlap_add_data.win_seq = 0;
133 
134       aac_persistent_mem->ptr_aac_dec_static_channel_info[i]
135           ->overlap_add_data.ptr_overlap_buf =
136           &aac_persistent_mem->overlap_buffer[i * OVERLAP_BUFFER_SIZE];
137     }
138   }
139 
140   return persistent_used;
141 }
142 
ixheaacd_huff_tables_create(ia_aac_dec_tables_struct * ptr_aac_tables)143 VOID ixheaacd_huff_tables_create(ia_aac_dec_tables_struct *ptr_aac_tables) {
144   ptr_aac_tables->code_book[0] = 0;
145   ptr_aac_tables->code_book[1] =
146       (UWORD16 *)ptr_aac_tables->pstr_huffmann_tables->input_table_cb1;
147   ptr_aac_tables->code_book[2] =
148       (UWORD16 *)ptr_aac_tables->pstr_huffmann_tables->input_table_cb2;
149   ptr_aac_tables->code_book[3] =
150       (UWORD16 *)ptr_aac_tables->pstr_huffmann_tables->input_table_cb3;
151   ptr_aac_tables->code_book[4] =
152       (UWORD16 *)ptr_aac_tables->pstr_huffmann_tables->input_table_cb4;
153   ptr_aac_tables->code_book[5] =
154       (UWORD16 *)ptr_aac_tables->pstr_huffmann_tables->input_table_cb5;
155   ptr_aac_tables->code_book[6] =
156       (UWORD16 *)ptr_aac_tables->pstr_huffmann_tables->input_table_cb6;
157   ptr_aac_tables->code_book[7] =
158       (UWORD16 *)ptr_aac_tables->pstr_huffmann_tables->input_table_cb7;
159   ptr_aac_tables->code_book[8] =
160       (UWORD16 *)ptr_aac_tables->pstr_huffmann_tables->input_table_cb8;
161   ptr_aac_tables->code_book[9] =
162       (UWORD16 *)ptr_aac_tables->pstr_huffmann_tables->input_table_cb9;
163   ptr_aac_tables->code_book[10] =
164       (UWORD16 *)ptr_aac_tables->pstr_huffmann_tables->input_table_cb10;
165   ptr_aac_tables->code_book[11] =
166       (UWORD16 *)ptr_aac_tables->pstr_huffmann_tables->input_table_cb10;
167   ptr_aac_tables->code_book[12] =
168       (UWORD16 *)ptr_aac_tables->pstr_huffmann_tables->input_table_cb10;
169 
170   ptr_aac_tables->index_table[1] =
171       (UWORD32 *)ptr_aac_tables->pstr_huffmann_tables->idx_table_hf1;
172   ptr_aac_tables->index_table[2] =
173       (UWORD32 *)ptr_aac_tables->pstr_huffmann_tables->idx_table_hf2;
174   ptr_aac_tables->index_table[3] =
175       (UWORD32 *)ptr_aac_tables->pstr_huffmann_tables->idx_table_hf3;
176   ptr_aac_tables->index_table[4] =
177       (UWORD32 *)ptr_aac_tables->pstr_huffmann_tables->idx_table_hf4;
178   ptr_aac_tables->index_table[5] =
179       (UWORD32 *)ptr_aac_tables->pstr_huffmann_tables->idx_table_hf5;
180   ptr_aac_tables->index_table[6] =
181       (UWORD32 *)ptr_aac_tables->pstr_huffmann_tables->idx_table_hf6;
182   ptr_aac_tables->index_table[7] =
183       (UWORD32 *)ptr_aac_tables->pstr_huffmann_tables->idx_table_hf7;
184   ptr_aac_tables->index_table[8] =
185       (UWORD32 *)ptr_aac_tables->pstr_huffmann_tables->idx_table_hf8;
186   ptr_aac_tables->index_table[9] =
187       (UWORD32 *)ptr_aac_tables->pstr_huffmann_tables->idx_table_hf9;
188   ptr_aac_tables->index_table[10] =
189       (UWORD32 *)ptr_aac_tables->pstr_huffmann_tables->idx_table_hf10;
190   ptr_aac_tables->index_table[11] =
191       (UWORD32 *)ptr_aac_tables->pstr_huffmann_tables->idx_table_hf10;
192   ptr_aac_tables->index_table[12] =
193       (UWORD32 *)ptr_aac_tables->pstr_huffmann_tables->idx_table_hf10;
194 
195   ptr_aac_tables->scale_factor_bands_short[0] =
196       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_96_128;
197   ptr_aac_tables->scale_factor_bands_short[1] =
198       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_96_128;
199   ptr_aac_tables->scale_factor_bands_short[2] =
200       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_96_128;
201   ptr_aac_tables->scale_factor_bands_short[3] =
202       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_128;
203   ptr_aac_tables->scale_factor_bands_short[4] =
204       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_128;
205   ptr_aac_tables->scale_factor_bands_short[5] =
206       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_128;
207   ptr_aac_tables->scale_factor_bands_short[6] =
208       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_128;
209   ptr_aac_tables->scale_factor_bands_short[7] =
210       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_128;
211   ptr_aac_tables->scale_factor_bands_short[8] =
212       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_16_128;
213   ptr_aac_tables->scale_factor_bands_short[9] =
214       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_16_128;
215   ptr_aac_tables->scale_factor_bands_short[10] =
216       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_16_128;
217   ptr_aac_tables->scale_factor_bands_short[11] =
218       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_8_128;
219 
220   ptr_aac_tables->scale_factor_bands_long[0] =
221       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_96_1024;
222   ptr_aac_tables->scale_factor_bands_long[1] =
223       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_96_1024;
224   ptr_aac_tables->scale_factor_bands_long[2] =
225       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_64_1024;
226   ptr_aac_tables->scale_factor_bands_long[3] =
227       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_1024;
228   ptr_aac_tables->scale_factor_bands_long[4] =
229       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_1024;
230   ptr_aac_tables->scale_factor_bands_long[5] =
231       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_32_1024;
232   ptr_aac_tables->scale_factor_bands_long[6] =
233       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_1024;
234   ptr_aac_tables->scale_factor_bands_long[7] =
235       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_1024;
236   ptr_aac_tables->scale_factor_bands_long[8] =
237       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_16_1024;
238   ptr_aac_tables->scale_factor_bands_long[9] =
239       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_16_1024;
240   ptr_aac_tables->scale_factor_bands_long[10] =
241       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_16_1024;
242   ptr_aac_tables->scale_factor_bands_long[11] =
243       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_8_1024;
244 
245   ptr_aac_tables->scale_fac_bands_512[0] =
246       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_512;
247   ptr_aac_tables->scale_fac_bands_512[1] =
248       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_512;
249   ptr_aac_tables->scale_fac_bands_512[2] =
250       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_512;
251   ptr_aac_tables->scale_fac_bands_512[3] =
252       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_512;
253   ptr_aac_tables->scale_fac_bands_512[4] =
254       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_512;
255   ptr_aac_tables->scale_fac_bands_512[5] =
256       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_32_512;
257   ptr_aac_tables->scale_fac_bands_512[6] =
258       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_512;
259   ptr_aac_tables->scale_fac_bands_512[7] =
260       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_512;
261   ptr_aac_tables->scale_fac_bands_512[8] =
262       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_512;
263   ptr_aac_tables->scale_fac_bands_512[9] =
264       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_512;
265   ptr_aac_tables->scale_fac_bands_512[10] =
266       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_512;
267   ptr_aac_tables->scale_fac_bands_512[11] =
268       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_512;
269   ptr_aac_tables->scale_fac_bands_512[12] =
270       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_512;
271   ptr_aac_tables->scale_fac_bands_512[13] =
272       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_512;
273   ptr_aac_tables->scale_fac_bands_512[14] =
274       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_512;
275   ptr_aac_tables->scale_fac_bands_512[15] =
276       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_512;
277 
278   ptr_aac_tables->scale_fac_bands_480[0] =
279       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_480;
280   ptr_aac_tables->scale_fac_bands_480[1] =
281       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_480;
282   ptr_aac_tables->scale_fac_bands_480[2] =
283       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_480;
284   ptr_aac_tables->scale_fac_bands_480[3] =
285       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_480;
286   ptr_aac_tables->scale_fac_bands_480[4] =
287       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_48_480;
288   ptr_aac_tables->scale_fac_bands_480[5] =
289       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_32_480;
290   ptr_aac_tables->scale_fac_bands_480[6] =
291       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_480;
292   ptr_aac_tables->scale_fac_bands_480[7] =
293       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_480;
294   ptr_aac_tables->scale_fac_bands_480[8] =
295       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_480;
296   ptr_aac_tables->scale_fac_bands_480[9] =
297       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_480;
298   ptr_aac_tables->scale_fac_bands_480[10] =
299       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_480;
300   ptr_aac_tables->scale_fac_bands_480[11] =
301       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_480;
302   ptr_aac_tables->scale_fac_bands_480[12] =
303       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_480;
304   ptr_aac_tables->scale_fac_bands_480[13] =
305       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_480;
306   ptr_aac_tables->scale_fac_bands_480[14] =
307       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_480;
308   ptr_aac_tables->scale_fac_bands_480[15] =
309       ptr_aac_tables->pstr_huffmann_tables->ixheaacd_sfb_24_480;
310 }
311 
ixheaacd_aac_decoder_init(ia_aac_dec_state_struct * p_state_enhaacplus_dec,ia_aac_dec_sbr_bitstream_struct * ptr_sbr_bitstream,WORD channels,VOID * aac_persistent_mem_v,WORD32 frame_length)312 ia_aac_decoder_struct *ixheaacd_aac_decoder_init(
313     ia_aac_dec_state_struct *p_state_enhaacplus_dec,
314     ia_aac_dec_sbr_bitstream_struct *ptr_sbr_bitstream, WORD channels,
315     VOID *aac_persistent_mem_v, WORD32 frame_length) {
316   WORD i, ch;
317   struct ia_aac_persistent_struct *aac_persistent_mem;
318   aac_persistent_mem = (struct ia_aac_persistent_struct *)aac_persistent_mem_v;
319 
320   aac_persistent_mem->str_aac_decoder.pstr_sbr_bitstream = ptr_sbr_bitstream;
321 
322   for (ch = 0; ch < channels; ch++) {
323     ia_aac_decoder_struct *aac_dec_handle =
324         &aac_persistent_mem->str_aac_decoder;
325     aac_dec_handle->pstr_aac_dec_overlap_info[ch] =
326         &aac_persistent_mem->str_aac_dec_overlap_info[ch];
327     aac_dec_handle->pstr_pns_rand_vec_data =
328         &aac_persistent_mem->str_pns_rand_vec_data;
329 
330     aac_dec_handle->pstr_aac_dec_overlap_info[ch]->window_shape = 0;
331     aac_dec_handle->pstr_aac_dec_overlap_info[ch]->window_sequence = 0;
332     if (p_state_enhaacplus_dec->audio_object_type == AOT_ER_AAC_ELD)
333       aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_overlap_buf =
334           &aac_persistent_mem->overlap_buffer[ch * 4 * OVERLAP_BUFFER_SIZE];
335     else
336       aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_overlap_buf =
337           &aac_persistent_mem->overlap_buffer[ch * OVERLAP_BUFFER_SIZE];
338 
339     {
340       WORD32 *ptr_overlap_buf =
341           aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_overlap_buf;
342       memset(ptr_overlap_buf, 0, sizeof(WORD32) * 4 * 512);
343     }
344     aac_persistent_mem->str_aac_decoder.ptr_aac_dec_static_channel_info[ch] =
345         aac_persistent_mem->ptr_aac_dec_static_channel_info[ch];
346     aac_persistent_mem->str_aac_decoder.ptr_aac_dec_static_channel_info[ch]
347         ->ltp_buf = aac_persistent_mem->ltp_buf[ch];
348   }
349 
350   for (i = 0; i < 1; i++) {
351     ia_aac_dec_sbr_bitstream_struct *ptr_sbr_bitstream =
352         &aac_persistent_mem->str_aac_decoder.pstr_sbr_bitstream[i];
353 
354     ptr_sbr_bitstream->no_elements = 0;
355     ptr_sbr_bitstream->str_sbr_ele[0].ptr_sbr_data =
356         &aac_persistent_mem->sbr_payload_buffer[ALIGN_SIZE64(MAXSBRBYTES) * i];
357     ptr_sbr_bitstream->str_sbr_ele[0].sbr_ele_id = ID_SCE;
358     ptr_sbr_bitstream->str_sbr_ele[0].size_payload = 0;
359   }
360 
361   {
362     ia_aac_dec_tables_struct *ptr_aac_tables =
363         aac_persistent_mem->str_aac_decoder.pstr_aac_tables;
364     ia_aac_dec_huffman_tables_struct *pstr_huffmann_tables =
365         ptr_aac_tables->pstr_huffmann_tables;
366 
367     WORD num_entries = sizeof(pstr_huffmann_tables->str_sample_rate_info) /
368                        sizeof(ia_sampling_rate_info_struct);
369 
370     WORD32 sampling_rate = p_state_enhaacplus_dec->sampling_rate;
371 
372     i = 0;
373     while ((i < num_entries) &&
374            sampling_rate != ((pstr_huffmann_tables->str_sample_rate_info[i]
375                                   .sampling_frequency))) {
376       i++;
377     }
378     if (i == 12) {
379       i = i - 1;
380     }
381 
382     if (i == num_entries) {
383       return NULL;
384     }
385 
386     if (frame_length == 1024) {
387       WORD16 *psfb_table_idx[2];
388       const WORD8 *psfb_width[2];
389       WORD width_idx;
390       WORD32 j;
391 
392       psfb_table_idx[0] = ptr_aac_tables->sfb_long_table;
393       psfb_table_idx[1] = ptr_aac_tables->sfb_short_table;
394 
395       psfb_width[0] = ptr_aac_tables->scale_factor_bands_long[i];
396       psfb_width[1] = ptr_aac_tables->scale_factor_bands_short[i];
397 
398       for (j = 1; j >= 0; j--) {
399         const WORD8 *ptr_width = psfb_width[j];
400         WORD16 *ptable_idx = psfb_table_idx[j];
401         width_idx = 0;
402         *ptable_idx++ = width_idx;
403         do {
404           width_idx += (*ptr_width++);
405           *ptable_idx++ = width_idx;
406         } while (*ptr_width != -1);
407 
408         aac_persistent_mem->str_aac_decoder.num_swb_window[j] =
409             (WORD8)(ptr_width - psfb_width[j]);
410       }
411 
412       {
413         ptr_aac_tables->str_aac_sfb_info[0].sfb_index =
414             ptr_aac_tables->sfb_long_table;
415         ptr_aac_tables->str_aac_sfb_info[1].sfb_index =
416             ptr_aac_tables->sfb_long_table;
417         ptr_aac_tables->str_aac_sfb_info[3].sfb_index =
418             ptr_aac_tables->sfb_long_table;
419 
420         ptr_aac_tables->str_aac_sfb_info[2].sfb_index =
421             ptr_aac_tables->sfb_short_table;
422 
423         ptr_aac_tables->str_aac_sfb_info[0].sfb_width = (WORD8 *)psfb_width[0];
424         ptr_aac_tables->str_aac_sfb_info[1].sfb_width = (WORD8 *)psfb_width[0];
425         ptr_aac_tables->str_aac_sfb_info[3].sfb_width = (WORD8 *)psfb_width[0];
426 
427         ptr_aac_tables->str_aac_sfb_info[2].sfb_width = (WORD8 *)psfb_width[1];
428       }
429     } else {
430       WORD16 *ptr_sfb_idx[2];
431       const WORD8 *ptr_sfb_width[2];
432       WORD width_idx;
433       WORD32 j;
434 
435       ptr_sfb_idx[0] = ptr_aac_tables->sfb_long_table;
436       ptr_sfb_idx[1] = ptr_aac_tables->sfb_short_table;
437 
438       if (frame_length == 512)
439         ptr_sfb_width[0] = ptr_aac_tables->scale_fac_bands_512[i];
440       else
441         ptr_sfb_width[0] = ptr_aac_tables->scale_fac_bands_480[i];
442 
443       for (j = 0; j >= 0; j--) {
444         const WORD8 *ptr_width = ptr_sfb_width[j];
445         WORD16 *ptr_idx = ptr_sfb_idx[j];
446         width_idx = 0;
447         *ptr_idx++ = width_idx;
448         do {
449           width_idx += (*ptr_width++);
450           *ptr_idx++ = width_idx;
451         } while (*ptr_width != -1);
452 
453         aac_persistent_mem->str_aac_decoder.num_swb_window[j] =
454             (WORD8)(ptr_width - ptr_sfb_width[j]);
455       }
456 
457       {
458         ptr_aac_tables->str_aac_sfb_info[0].sfb_index =
459             ptr_aac_tables->sfb_long_table;
460         ptr_aac_tables->str_aac_sfb_info[1].sfb_index =
461             ptr_aac_tables->sfb_long_table;
462         ptr_aac_tables->str_aac_sfb_info[3].sfb_index =
463             ptr_aac_tables->sfb_long_table;
464         ptr_aac_tables->str_aac_sfb_info[2].sfb_index =
465             ptr_aac_tables->sfb_short_table;
466 
467         ptr_aac_tables->str_aac_sfb_info[0].sfb_width =
468             (WORD8 *)ptr_sfb_width[0];
469         ptr_aac_tables->str_aac_sfb_info[1].sfb_width =
470             (WORD8 *)ptr_sfb_width[0];
471         ptr_aac_tables->str_aac_sfb_info[3].sfb_width =
472             (WORD8 *)ptr_sfb_width[0];
473         ptr_aac_tables->str_aac_sfb_info[2].sfb_width =
474             (WORD8 *)ptr_sfb_width[1];
475       }
476     }
477     {
478       ia_aac_decoder_struct *aac_dec_handle =
479           &aac_persistent_mem->str_aac_decoder;
480       aac_dec_handle->sampling_rate_index = (WORD16)i;
481       aac_dec_handle->sampling_rate = sampling_rate;
482       aac_dec_handle->channels = 1;
483       aac_dec_handle->block_number = 0;
484       aac_dec_handle->samples_per_frame = frame_length;
485     }
486   }
487 
488   return &(aac_persistent_mem->str_aac_decoder);
489 }
490