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
21 #include <string.h>
22 #include "ixheaacd_sbr_common.h"
23 #include <ixheaacd_type_def.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
31 #include "ixheaacd_bitbuffer.h"
32 #include "ixheaacd_error_codes.h"
33 #include "ixheaacd_defines.h"
34 #include "ixheaacd_aac_rom.h"
35 #include "ixheaacd_pulsedata.h"
36
37 #include "ixheaacd_pns.h"
38 #include "ixheaacd_drc_data_struct.h"
39
40 #include "ixheaacd_lt_predict.h"
41 #include "ixheaacd_channelinfo.h"
42
43 #include "ixheaacd_drc_dec.h"
44
45 #include "ixheaacd_sbrdecoder.h"
46
47 #include "ixheaacd_block.h"
48 #include "ixheaacd_channel.h"
49
50 #include "ixheaacd_common_rom.h"
51 #include "ixheaacd_basic_funcs.h"
52 #include "ixheaacd_basic_op.h"
53
54 #include "ixheaacd_aacdec.h"
55
56 #include "ixheaacd_sbrdecsettings.h"
57 #include "ixheaacd_sbr_scale.h"
58 #include "ixheaacd_env_extr_part.h"
59 #include "ixheaacd_sbr_rom.h"
60 #include "ixheaacd_audioobjtypes.h"
61 #include "ixheaacd_sbrdecoder.h"
62 #include "ixheaacd_memory_standards.h"
63 #include "ixheaacd_latmdemux.h"
64 #include "ixheaacd_mps_polyphase.h"
65 #include "ixheaacd_config.h"
66 #include "ixheaacd_mps_dec.h"
67 #include "ixheaacd_struct_def.h"
68
69 #include "ixheaacd_cnst.h"
70
71 #define RVLC_ERROR_ALL_ESCAPE_WORDS_INVALID 0x80000000
72 #define RVLC_ERROR_RVL_SUM_BIT_COUNTER_BELOW_ZERO_FWD 0x40000000
73 #define RVLC_ERROR_RVL_SUM_BIT_COUNTER_BELOW_ZERO_BWD 0x20000000
74 #define RVLC_ERROR_FORBIDDEN_CW_DETECTED_FWD 0x08000000
75 #define RVLC_ERROR_FORBIDDEN_CW_DETECTED_BWD 0x04000000
76
77 #define FWD 0
78 #define BWD 1
79
80 #define MAX_RVL 7
81 #define MIN_RVL -7
82 #define MAX_ALLOWED_DPCM_INDEX 14
83 #define TABLE_OFFSET 7
84 #define MAX_LEN_RVLC_CODE_WORD 9
85 #define MAX_LEN_RVLC_ESCAPE_WORD 20
86
87 #define DPCM_NOISE_NRG_BITS 9
88 #define SF_OFFSET 100
89
90 #define CONCEAL_MAX_INIT 1311
91 #define CONCEAL_MIN_INIT -1311
92
93 #define RVLC_MAX_SFB ((8) * (16))
94
95 #define MASK_LEFT 0xFFF000
96 #define MASK_RIGHT 0xFFF
97 #define CLR_BIT_10 0x3FF
98 #define NODE_MASK 0x400
99
100 #define LEFT_OFFSET 12
101
102 #define ixheaacd_bitbuf_checkpoint(it_bit_buf, saved_bit_buf) \
103 (saved_bit_buf) = (it_bit_buf)
104 #define ixheaacd_bitbuf_restore(it_bit_buf, saved_bit_buf) \
105 (it_bit_buf) = (saved_bit_buf)
106
ixheaacd_rvlc_decode(short cw,int len,int * found)107 static int ixheaacd_rvlc_decode(short cw, int len, int *found) {
108 short indx = 0;
109 *found = 0;
110 switch (len) {
111 case 1:
112 if (cw == 0)
113 indx = 0;
114 else
115 return 3;
116 break;
117 case 3:
118 switch (cw) {
119 case 5:
120 indx = -1;
121 break;
122 case 7:
123 indx = 1;
124 break;
125 default:
126 return 4;
127 }
128 break;
129 case 4:
130 if (cw == 9)
131 indx = -2;
132 else
133 return 5;
134 break;
135 case 5:
136 switch (cw) {
137 case 17:
138 indx = -3;
139 break;
140 case 27:
141 indx = 2;
142 break;
143 default:
144 return 6;
145 }
146 break;
147 case 6:
148 switch (cw) {
149 case 33:
150 indx = -4;
151 break;
152 case 51:
153 indx = 3;
154 break;
155 default:
156 return 7;
157 }
158 break;
159 case 7:
160 switch (cw) {
161 case 65:
162 indx = -7;
163 break;
164 case 107:
165 indx = 4;
166 break;
167 case 99:
168 indx = 7;
169 break;
170 default:
171 return 8;
172 }
173 break;
174 case 8:
175 switch (cw) {
176 case 129:
177 indx = -5;
178 break;
179 case 195:
180 indx = 5;
181 break;
182 default:
183 return 9;
184 }
185 break;
186 case 9:
187 switch (cw) {
188 case 257:
189 indx = -6;
190 break;
191 case 427:
192 indx = 6;
193 break;
194 default:
195 return -1;
196 }
197 break;
198 default:
199 return -1;
200 }
201 *found = 1;
202 return indx;
203 }
204
ixheaacd_rvlc_decode_esc(int cw,int len,int * found)205 static int ixheaacd_rvlc_decode_esc(int cw, int len, int *found) {
206 short indx = 0;
207 *found = 0;
208 switch (len) {
209 case 2:
210 switch (cw) {
211 case 2:
212 indx = 0;
213 break;
214 case 0:
215 indx = 1;
216 break;
217 default:
218 return 3;
219 }
220 break;
221 case 3:
222 switch (cw) {
223 case 6:
224 indx = 2;
225 break;
226 case 2:
227 indx = 3;
228 break;
229 default:
230 return 4;
231 }
232 break;
233 case 4:
234 if (cw == 14)
235 indx = 4;
236 else
237 return 5;
238 break;
239 case 5:
240 switch (cw) {
241 case 31:
242 indx = 5;
243 break;
244 case 15:
245 indx = 6;
246 break;
247 case 13:
248 indx = 7;
249 break;
250 default:
251 return 6;
252 }
253 break;
254 case 6:
255 switch (cw) {
256 case 61:
257 indx = 8;
258 break;
259 case 29:
260 indx = 9;
261 break;
262 case 25:
263 indx = 10;
264 break;
265 case 24:
266 indx = 11;
267 break;
268 default:
269 return 7;
270 }
271 break;
272 case 7:
273 switch (cw) {
274 case 120:
275 indx = 12;
276 break;
277 case 56:
278 indx = 13;
279 break;
280 default:
281 return 8;
282 }
283 break;
284 case 8:
285 switch (cw) {
286 case 242:
287 indx = 14;
288 break;
289 case 114:
290 indx = 15;
291 break;
292 default:
293 return 9;
294 }
295 break;
296 case 9:
297 switch (cw) {
298 case 486:
299 indx = 16;
300 break;
301 case 230:
302 indx = 17;
303 break;
304 default:
305 return 10;
306 }
307 break;
308 case 10:
309 switch (cw) {
310 case 974:
311 indx = 18;
312 break;
313 case 463:
314 indx = 19;
315 break;
316 default:
317 return 11;
318 }
319 break;
320 case 11:
321 switch (cw) {
322 case 1950:
323 indx = 20;
324 break;
325 case 1951:
326 indx = 21;
327 break;
328 case 925:
329 indx = 22;
330 break;
331 default:
332 return 12;
333 }
334 break;
335 case 12:
336 if (cw == 1848)
337 indx = 23;
338 else
339 return 13;
340 break;
341 case 13:
342 if (cw == 3698)
343 indx = 25;
344 else
345 return 14;
346 break;
347 case 14:
348 if (cw == 7399)
349 indx = 24;
350 else
351 return 15;
352 break;
353 case 15:
354 if (cw == 14797)
355 indx = 26;
356 else
357 return 19;
358 break;
359 case 19:
360 if ((cw >= 236736) && (cw <= 236740))
361 indx = 53 - (236740 - cw);
362 else
363 return 20;
364 break;
365 case 20:
366 if ((cw >= 473482) && (cw <= 473503))
367 indx = 48 - (473503 - cw);
368 else
369 return -1;
370 break;
371 default:
372 return -1;
373 }
374 *found = 1;
375 return indx;
376 }
ixheaacd_rvlc_check_intensity_cb(ia_rvlc_info_struct * ptr_rvlc,ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info)377 static VOID ixheaacd_rvlc_check_intensity_cb(
378 ia_rvlc_info_struct *ptr_rvlc,
379 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info) {
380 WORD32 group, band, bnds;
381
382 ptr_rvlc->intensity_used = 0;
383
384 for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
385 for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
386 bnds = 16 * group + band;
387 if ((ptr_aac_dec_channel_info->ptr_code_book[bnds] == INTENSITY_HCB) ||
388 (ptr_aac_dec_channel_info->ptr_code_book[bnds] == INTENSITY_HCB2)) {
389 ptr_rvlc->intensity_used = 1;
390 break;
391 }
392 }
393 }
394 }
395
ixheaacd_carry_bit_branch_val(UWORD8 carry_bit,UWORD32 tree_node,UWORD32 * branch_val,UWORD32 * branch_node)396 VOID ixheaacd_carry_bit_branch_val(UWORD8 carry_bit, UWORD32 tree_node,
397 UWORD32 *branch_val, UWORD32 *branch_node) {
398 if (carry_bit == 0) {
399 *branch_node = (tree_node & MASK_LEFT) >> LEFT_OFFSET;
400 } else {
401 *branch_node = tree_node & MASK_RIGHT;
402 }
403
404 *branch_val = *branch_node & CLR_BIT_10;
405 }
406
ixheaacd_rvlc_read_bits(ia_bit_buf_struct * it_bit_buff,UWORD16 * ptr_position,UWORD8 read_direction)407 UWORD8 ixheaacd_rvlc_read_bits(ia_bit_buf_struct *it_bit_buff,
408 UWORD16 *ptr_position, UWORD8 read_direction) {
409 UWORD32 bit;
410 WORD32 read_bit_offset =
411 *ptr_position - (it_bit_buff->size - it_bit_buff->cnt_bits);
412
413 if (read_bit_offset) it_bit_buff->cnt_bits -= read_bit_offset;
414
415 it_bit_buff->ptr_read_next =
416 it_bit_buff->ptr_bit_buf_base +
417 ((it_bit_buff->size - it_bit_buff->cnt_bits) >> 3);
418 it_bit_buff->bit_pos = ((it_bit_buff->size - it_bit_buff->cnt_bits) & 7);
419
420 if (read_direction == 0) {
421 bit = ixheaacd_aac_read_bit_rev(it_bit_buff);
422
423 *ptr_position += 1;
424 } else {
425 bit = ixheaacd_aac_read_bit(it_bit_buff);
426
427 *ptr_position -= 1;
428 }
429
430 return (bit);
431 }
432
ixheaacd_rvlc_decode_escape_word(ia_rvlc_info_struct * ptr_rvlc,ia_bit_buf_struct * it_bit_buff)433 static WORD8 ixheaacd_rvlc_decode_escape_word(ia_rvlc_info_struct *ptr_rvlc,
434 ia_bit_buf_struct *it_bit_buff) {
435 WORD32 i;
436
437 UWORD8 carry_bit;
438
439 UWORD16 *ptr_bitstream_index_esc;
440
441 int len = 0;
442 int codeword = 0;
443 int found = 0;
444 int indx;
445
446 ptr_bitstream_index_esc = &(ptr_rvlc->esc_bit_str_idx);
447
448 for (i = MAX_LEN_RVLC_ESCAPE_WORD - 1; i >= 0; i--) {
449 carry_bit =
450 ixheaacd_rvlc_read_bits(it_bit_buff, ptr_bitstream_index_esc, FWD);
451
452 len++;
453 codeword = codeword << 1 | carry_bit;
454 indx = ixheaacd_rvlc_decode_esc(codeword, len, &found);
455
456 if (found) {
457 ptr_rvlc->rvlc_esc_len -= (MAX_LEN_RVLC_ESCAPE_WORD - i);
458 return indx;
459 }
460 }
461
462 ptr_rvlc->rvlc_err_log |= RVLC_ERROR_ALL_ESCAPE_WORDS_INVALID;
463
464 return -1;
465 }
466
ixheaacd_rvlc_decode_escape(ia_rvlc_info_struct * ptr_rvlc,WORD16 * ptr_escape,ia_bit_buf_struct * it_bit_buff)467 static VOID ixheaacd_rvlc_decode_escape(ia_rvlc_info_struct *ptr_rvlc,
468 WORD16 *ptr_escape,
469 ia_bit_buf_struct *it_bit_buff) {
470 WORD8 esc_word;
471 WORD8 esc_cnt = 0;
472 WORD16 *ptr_esc_bit_cnt_sum;
473
474 ptr_esc_bit_cnt_sum = &(ptr_rvlc->rvlc_esc_len);
475
476 while (*ptr_esc_bit_cnt_sum > 0) {
477 esc_word = ixheaacd_rvlc_decode_escape_word(ptr_rvlc, it_bit_buff);
478
479 if (esc_word >= 0) {
480 ptr_escape[esc_cnt] = esc_word;
481 esc_cnt++;
482 } else {
483 ptr_rvlc->rvlc_err_log |= RVLC_ERROR_ALL_ESCAPE_WORDS_INVALID;
484 ptr_rvlc->num_esc_words_decoded = esc_cnt;
485
486 return;
487 }
488 }
489
490 ptr_rvlc->num_esc_words_decoded = esc_cnt;
491 }
492
ixheaacd_decode_rvlc_code_word(ia_bit_buf_struct * it_bit_buff,ia_rvlc_info_struct * ptr_rvlc)493 WORD8 ixheaacd_decode_rvlc_code_word(ia_bit_buf_struct *it_bit_buff,
494 ia_rvlc_info_struct *ptr_rvlc) {
495 WORD32 i;
496
497 UWORD8 carry_bit;
498
499 UWORD8 direction = ptr_rvlc->direction;
500 UWORD16 *ptr_bit_str_idx_rvl = ptr_rvlc->ptr_rvl_bit_str_idx;
501
502 int len = 0;
503 short codeword = 0;
504 int found = 0;
505 int indx;
506
507 for (i = MAX_LEN_RVLC_CODE_WORD - 1; i >= 0; i--) {
508 carry_bit =
509 ixheaacd_rvlc_read_bits(it_bit_buff, ptr_bit_str_idx_rvl, direction);
510
511 len++;
512 codeword = codeword << 1 | carry_bit;
513 indx = ixheaacd_rvlc_decode(codeword, len, &found);
514 if (found) {
515 indx = indx + 7;
516 *ptr_rvlc->ptr_rvl_bit_cnt -= (MAX_LEN_RVLC_CODE_WORD - i);
517 return indx;
518 }
519 }
520
521 return -1;
522 }
523
ixheaacd_rvlc_decode_forward(ia_rvlc_info_struct * ptr_rvlc,ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info,ia_bit_buf_struct * it_bit_buff)524 static VOID ixheaacd_rvlc_decode_forward(
525 ia_rvlc_info_struct *ptr_rvlc,
526 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
527 ia_bit_buf_struct *it_bit_buff) {
528 WORD32 band = 0;
529 WORD32 group = 0;
530 WORD32 bnds = 0;
531
532 WORD16 dpcm;
533
534 ia_bit_buf_struct temp_buf = {0};
535
536 WORD16 factor = ptr_aac_dec_channel_info->global_gain;
537 WORD16 position = 0;
538 WORD16 noise_energy = ptr_aac_dec_channel_info->global_gain - 90 - 256;
539
540 WORD16 *ptr_scf_fwd = ptr_aac_dec_channel_info->rvlc_scf_fwd_arr;
541 WORD16 *ptr_scf_esc = ptr_aac_dec_channel_info->rvlc_scf_esc_arr;
542 UWORD8 *ptr_esc_fwd_cnt = &(ptr_rvlc->num_fwd_esc_words_decoded);
543
544 ptr_rvlc->ptr_rvl_bit_cnt = &(ptr_rvlc->rvlc_sf_fwd_len);
545 ptr_rvlc->ptr_rvl_bit_str_idx = &(ptr_rvlc->rvl_fwd_bit_str_idx);
546
547 *ptr_esc_fwd_cnt = 0;
548 ptr_rvlc->direction = 0;
549 ptr_rvlc->noise_used = 0;
550 ptr_rvlc->sf_used = 0;
551 ptr_rvlc->last_scale_fac = 0;
552 ptr_rvlc->last_nrg = 0;
553 ptr_rvlc->is_last = 0;
554
555 ixheaacd_rvlc_check_intensity_cb(ptr_rvlc, ptr_aac_dec_channel_info);
556
557 for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
558 for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
559 bnds = 16 * group + band;
560
561 switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
562 case ZERO_HCB:
563 ptr_scf_fwd[bnds] = 0;
564 break;
565
566 case INTENSITY_HCB2:
567 case INTENSITY_HCB:
568
569 {
570 dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
571 if (dpcm < 0) {
572 ptr_rvlc->conceal_max = bnds;
573 return;
574 }
575 dpcm -= 7;
576 }
577 if ((dpcm == -7) || (dpcm == 7)) {
578 if (ptr_rvlc->rvlc_esc_len) {
579 ptr_rvlc->conceal_max = bnds;
580 return;
581 } else {
582 if (dpcm == -7) {
583 dpcm -= *ptr_scf_esc++;
584 } else {
585 dpcm += *ptr_scf_esc++;
586 }
587 (*ptr_esc_fwd_cnt)++;
588 if (ptr_rvlc->conceal_max_esc == 1311) {
589 ptr_rvlc->conceal_max_esc = bnds;
590 }
591 }
592 }
593 position += dpcm;
594 ptr_scf_fwd[bnds] = position;
595 ptr_rvlc->is_last = position;
596 break;
597
598 case NOISE_HCB:
599 if (ptr_rvlc->noise_used == 0) {
600 ptr_rvlc->noise_used = 1;
601 ptr_rvlc->first_noise_band = bnds;
602 noise_energy += ptr_rvlc->dpcm_noise_nrg;
603 ptr_scf_fwd[bnds] = noise_energy;
604 ptr_rvlc->last_nrg = noise_energy;
605 } else {
606 dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
607 if (dpcm < 0) {
608 ptr_rvlc->conceal_max = bnds;
609 return;
610 }
611 dpcm -= 7;
612 if ((dpcm == -7) || (dpcm == 7)) {
613 if (ptr_rvlc->rvlc_esc_len) {
614 ptr_rvlc->conceal_max = bnds;
615 return;
616 } else {
617 if (dpcm == -7) {
618 dpcm -= *ptr_scf_esc++;
619 } else {
620 dpcm += *ptr_scf_esc++;
621 }
622 (*ptr_esc_fwd_cnt)++;
623 if (ptr_rvlc->conceal_max_esc == 1311) {
624 ptr_rvlc->conceal_max_esc = bnds;
625 }
626 }
627 }
628 noise_energy += dpcm;
629 ptr_scf_fwd[bnds] = noise_energy;
630 ptr_rvlc->last_nrg = noise_energy;
631 }
632 ptr_aac_dec_channel_info->str_pns_info.pns_used[bnds] = 1;
633 break;
634
635 default:
636 ptr_rvlc->sf_used = 1;
637 {
638 memcpy(&temp_buf, it_bit_buff, sizeof(ia_bit_buf_struct));
639
640 dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
641 if (dpcm < 0) {
642 ptr_rvlc->conceal_max = bnds;
643 return;
644 }
645 dpcm -= 7;
646 }
647 if ((dpcm == -7) || (dpcm == 7)) {
648 if (ptr_rvlc->rvlc_esc_len) {
649 ptr_rvlc->conceal_max = bnds;
650 return;
651 } else {
652 if (dpcm == -7) {
653 dpcm -= *ptr_scf_esc++;
654 } else {
655 dpcm += *ptr_scf_esc++;
656 }
657 (*ptr_esc_fwd_cnt)++;
658 if (ptr_rvlc->conceal_max_esc == 1311) {
659 ptr_rvlc->conceal_max_esc = bnds;
660 }
661 }
662 }
663 factor += dpcm;
664 ptr_scf_fwd[bnds] = factor;
665 ptr_rvlc->last_scale_fac = factor;
666 break;
667 }
668 }
669 }
670
671 if (ptr_rvlc->intensity_used) {
672 dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
673 if (dpcm < 0) {
674 ptr_rvlc->conceal_max = bnds;
675 return;
676 }
677 dpcm -= 7;
678 if ((dpcm == -7) || (dpcm == 7)) {
679 if (ptr_rvlc->rvlc_esc_len) {
680 ptr_rvlc->conceal_max = bnds;
681 return;
682 } else {
683 if (dpcm == -7) {
684 dpcm -= *ptr_scf_esc++;
685 } else {
686 dpcm += *ptr_scf_esc++;
687 }
688 (*ptr_esc_fwd_cnt)++;
689 if (ptr_rvlc->conceal_max_esc == 1311) {
690 ptr_rvlc->conceal_max_esc = bnds;
691 }
692 }
693 }
694 ptr_rvlc->dpcm_is_last_pos = dpcm;
695 }
696 }
697
ixheaacd_rvlc_decode_backward(ia_rvlc_info_struct * ptr_rvlc,ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info,ia_bit_buf_struct * it_bit_buff)698 static VOID ixheaacd_rvlc_decode_backward(
699 ia_rvlc_info_struct *ptr_rvlc,
700 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
701 ia_bit_buf_struct *it_bit_buff) {
702 WORD16 band, group, dpcm, ixheaacd_drc_offset;
703 WORD16 bnds = ptr_rvlc->max_sfb_transmitted - 1;
704
705 WORD16 factor = ptr_rvlc->rev_global_gain;
706 WORD16 position = ptr_rvlc->dpcm_is_last_pos;
707 WORD16 noise_energy =
708 ptr_rvlc->rev_global_gain + ptr_rvlc->dpcm_noise_last_pos - 90 - 256;
709
710 WORD16 *ptr_scf_bwd = ptr_aac_dec_channel_info->rvlc_scf_bwd_arr;
711 WORD16 *ptr_scf_esc = ptr_aac_dec_channel_info->rvlc_scf_esc_arr;
712 UWORD8 *ptr_esc_cnt = &(ptr_rvlc->num_esc_words_decoded);
713 UWORD8 *ptr_esc_bwd_cnt = &(ptr_rvlc->num_bwd_esc_words_decoded);
714
715 ptr_rvlc->ptr_rvl_bit_cnt = &(ptr_rvlc->rvlc_sf_bwd_len);
716 ptr_rvlc->ptr_rvl_bit_str_idx = &(ptr_rvlc->rvl_bwd_bit_str_idx);
717
718 *ptr_esc_bwd_cnt = 0;
719 ptr_rvlc->direction = 1;
720 ptr_scf_esc += *ptr_esc_cnt - 1;
721 ptr_rvlc->firt_scale_fac = 0;
722 ptr_rvlc->first_nrg = 0;
723 ptr_rvlc->is_first = 0;
724
725 if (ptr_rvlc->intensity_used) {
726 dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
727 if (dpcm < 0) {
728 ptr_rvlc->dpcm_is_last_pos = 0;
729 ptr_rvlc->conceal_min = bnds;
730 return;
731 }
732 dpcm -= 7;
733 if ((dpcm == -7) || (dpcm == 7)) {
734 if (ptr_rvlc->rvlc_esc_len) {
735 ptr_rvlc->conceal_min = bnds;
736 return;
737 } else {
738 if (dpcm == -7) {
739 dpcm -= *ptr_scf_esc--;
740 } else {
741 dpcm += *ptr_scf_esc--;
742 }
743 (*ptr_esc_bwd_cnt)++;
744 if (ptr_rvlc->conceal_min_esc == -1311) {
745 ptr_rvlc->conceal_min_esc = bnds;
746 }
747 }
748 }
749 ptr_rvlc->dpcm_is_last_pos = dpcm;
750 }
751
752 for (group = ptr_rvlc->num_wind_grps - 1; group >= 0; group--) {
753 for (band = ptr_rvlc->max_sfb_transmitted - 1; band >= 0; band--) {
754 bnds = 16 * group + band;
755 if ((band == 0) && (ptr_rvlc->num_wind_grps != 1))
756 ixheaacd_drc_offset = 16 - ptr_rvlc->max_sfb_transmitted + 1;
757 else
758 ixheaacd_drc_offset = 1;
759
760 switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
761 case ZERO_HCB:
762 ptr_scf_bwd[bnds] = 0;
763 break;
764
765 case INTENSITY_HCB2:
766 case INTENSITY_HCB:
767
768 dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
769 if (dpcm < 0) {
770 ptr_scf_bwd[bnds] = position;
771
772 return;
773 }
774 dpcm -= 7;
775 if ((dpcm == -7) || (dpcm == 7)) {
776 if (ptr_rvlc->rvlc_esc_len) {
777 ptr_scf_bwd[bnds] = position;
778
779 return;
780 } else {
781 if (dpcm == -7) {
782 dpcm -= *ptr_scf_esc--;
783 } else {
784 dpcm += *ptr_scf_esc--;
785 }
786 (*ptr_esc_bwd_cnt)++;
787 if (ptr_rvlc->conceal_min_esc == -1311) {
788 }
789 }
790 }
791 ptr_scf_bwd[bnds] = position;
792 position -= dpcm;
793 ptr_rvlc->is_first = position;
794 break;
795
796 case NOISE_HCB:
797 if (bnds == ptr_rvlc->first_noise_band) {
798 ptr_scf_bwd[bnds] = ptr_rvlc->dpcm_noise_nrg +
799 ptr_aac_dec_channel_info->global_gain - 90 -
800 256;
801 ptr_rvlc->first_nrg = ptr_scf_bwd[bnds];
802 } else {
803 dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
804 if (dpcm < 0) {
805 ptr_scf_bwd[bnds] = noise_energy;
806 return;
807 }
808 dpcm -= 7;
809 if ((dpcm == -7) || (dpcm == 7)) {
810 if (ptr_rvlc->rvlc_esc_len) {
811 ptr_scf_bwd[bnds] = noise_energy;
812 return;
813 } else {
814 if (dpcm == -7) {
815 dpcm -= *ptr_scf_esc--;
816 } else {
817 dpcm += *ptr_scf_esc--;
818 }
819 (*ptr_esc_bwd_cnt)++;
820 if (ptr_rvlc->conceal_min_esc == -1311) {
821 }
822 }
823 }
824 ptr_scf_bwd[bnds] = noise_energy;
825 noise_energy -= dpcm;
826 ptr_rvlc->first_nrg = noise_energy;
827 }
828 break;
829
830 default:
831 dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
832 if (dpcm < 0) {
833 ptr_scf_bwd[bnds] = factor;
834
835 return;
836 }
837 dpcm -= 7;
838 if ((dpcm == -7) || (dpcm == 7)) {
839 if (ptr_rvlc->rvlc_esc_len) {
840 ptr_scf_bwd[bnds] = factor;
841
842 return;
843 } else {
844 if (dpcm == -7) {
845 dpcm -= *ptr_scf_esc--;
846 } else {
847 dpcm += *ptr_scf_esc--;
848 }
849 (*ptr_esc_bwd_cnt)++;
850 if (ptr_rvlc->conceal_min_esc == -1311) {
851 }
852 }
853 }
854 ptr_scf_bwd[bnds] = factor;
855 factor -= dpcm;
856 ptr_rvlc->firt_scale_fac = factor;
857 break;
858 }
859 }
860 }
861 }
862
ixheaacd_rvlc_read(ia_bit_buf_struct * it_bit_buff,ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info)863 VOID ixheaacd_rvlc_read(
864 ia_bit_buf_struct *it_bit_buff,
865 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info) {
866 ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
867
868 WORD32 group, band;
869
870 ptr_rvlc->num_wind_grps =
871 ptr_aac_dec_channel_info->str_ics_info.num_window_groups;
872 ptr_rvlc->max_sfb_transmitted =
873 ptr_aac_dec_channel_info->str_ics_info.max_sfb;
874 ptr_rvlc->noise_used = 0;
875 ptr_rvlc->dpcm_noise_nrg = 0;
876 ptr_rvlc->dpcm_noise_last_pos = 0;
877 ptr_rvlc->rvlc_esc_len = -1;
878 ptr_rvlc->dpcm_is_last_pos = 0;
879
880 ptr_rvlc->sf_concealment = ixheaacd_read_bits_buf(it_bit_buff, 1);
881 ptr_rvlc->rev_global_gain = ixheaacd_read_bits_buf(it_bit_buff, 8);
882
883 if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
884 EIGHT_SHORT_SEQUENCE) {
885 ptr_rvlc->rvlc_sf_len = ixheaacd_read_bits_buf(it_bit_buff, 11);
886 } else {
887 ptr_rvlc->rvlc_sf_len = ixheaacd_read_bits_buf(it_bit_buff, 9);
888 }
889
890 for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
891 for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
892 if (ptr_aac_dec_channel_info->ptr_code_book[16 * group + band] ==
893 NOISE_HCB) {
894 ptr_rvlc->noise_used = 1;
895 break;
896 }
897 }
898 }
899
900 if (ptr_rvlc->noise_used)
901 ptr_rvlc->dpcm_noise_nrg = ixheaacd_read_bits_buf(it_bit_buff, 9);
902
903 ptr_rvlc->sf_esc_present = ixheaacd_read_bits_buf(it_bit_buff, 1);
904
905 if (ptr_rvlc->sf_esc_present) {
906 ptr_rvlc->rvlc_esc_len = ixheaacd_read_bits_buf(it_bit_buff, 8);
907 }
908
909 if (ptr_rvlc->noise_used) {
910 ptr_rvlc->dpcm_noise_last_pos = ixheaacd_read_bits_buf(it_bit_buff, 9);
911 ptr_rvlc->rvlc_sf_len -= 9;
912 }
913
914 ptr_rvlc->rvlc_sf_fwd_len = ptr_rvlc->rvlc_sf_len;
915 ptr_rvlc->rvlc_sf_bwd_len = ptr_rvlc->rvlc_sf_len;
916 }
917
ixheaacd_hcr_read(ia_bit_buf_struct * it_bit_buff,ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info,WORD32 ele_type)918 VOID ixheaacd_hcr_read(ia_bit_buf_struct *it_bit_buff,
919 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
920 WORD32 ele_type) {
921 WORD16 len_reordered_spec_data;
922 WORD8 len_longest_code_word;
923
924 ptr_aac_dec_channel_info->reorder_spect_data_len = 0;
925 ptr_aac_dec_channel_info->longest_cw_len = 0;
926
927 len_reordered_spec_data = ixheaacd_read_bits_buf(it_bit_buff, 14);
928 if (ele_type == ID_CPE) {
929 if ((len_reordered_spec_data >= 0) && (len_reordered_spec_data <= 12288)) {
930 ptr_aac_dec_channel_info->reorder_spect_data_len =
931 len_reordered_spec_data;
932 } else {
933 if (len_reordered_spec_data > 12288) {
934 ptr_aac_dec_channel_info->reorder_spect_data_len = 12288;
935 }
936 }
937 } else if (ele_type == ID_SCE || ele_type == ID_LFE || ele_type == ID_CCE) {
938 if ((len_reordered_spec_data >= 0) && (len_reordered_spec_data <= 6144)) {
939 ptr_aac_dec_channel_info->reorder_spect_data_len =
940 len_reordered_spec_data;
941 } else {
942 if (len_reordered_spec_data > 6144) {
943 ptr_aac_dec_channel_info->reorder_spect_data_len = 6144;
944 }
945 }
946 }
947
948 len_longest_code_word = ixheaacd_read_bits_buf(it_bit_buff, 6);
949 if ((len_longest_code_word >= 0) && (len_longest_code_word <= 49)) {
950 ptr_aac_dec_channel_info->longest_cw_len = len_longest_code_word;
951 } else {
952 if (len_longest_code_word > 49) {
953 ptr_aac_dec_channel_info->longest_cw_len = 49;
954 }
955 }
956 }
957
ixheaacd_rvlc_init(ia_rvlc_info_struct * ptr_rvlc,ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info,ia_bit_buf_struct * it_bit_buff)958 static WORD32 ixheaacd_rvlc_init(
959 ia_rvlc_info_struct *ptr_rvlc,
960 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
961 ia_bit_buf_struct *it_bit_buff) {
962 WORD16 *ptr_scf_esc = ptr_aac_dec_channel_info->rvlc_scf_esc_arr;
963 WORD16 *ptr_scf_fwd = ptr_aac_dec_channel_info->rvlc_scf_fwd_arr;
964 WORD16 *ptr_scf_bwd = ptr_aac_dec_channel_info->rvlc_scf_bwd_arr;
965 WORD16 *ptr_scale_factor = ptr_aac_dec_channel_info->ptr_scale_factor;
966 WORD32 bnds;
967
968 ptr_aac_dec_channel_info->rvlc_intensity_used = 0;
969
970 ptr_rvlc->num_esc_words_decoded = 0;
971 ptr_rvlc->num_fwd_esc_words_decoded = 0;
972 ptr_rvlc->num_bwd_esc_words_decoded = 0;
973
974 ptr_rvlc->intensity_used = 0;
975 ptr_rvlc->rvlc_err_log = 0;
976
977 ptr_rvlc->conceal_max = CONCEAL_MAX_INIT;
978 ptr_rvlc->conceal_min = CONCEAL_MIN_INIT;
979
980 ptr_rvlc->conceal_max_esc = CONCEAL_MAX_INIT;
981 ptr_rvlc->conceal_min_esc = CONCEAL_MIN_INIT;
982
983 for (bnds = 0; bnds < RVLC_MAX_SFB; bnds++) {
984 ptr_scf_fwd[bnds] = 0;
985 ptr_scf_bwd[bnds] = 0;
986 ptr_scf_esc[bnds] = 0;
987 ptr_scale_factor[bnds] = 0;
988 }
989
990 ptr_rvlc->rvl_fwd_bit_str_idx = it_bit_buff->size - it_bit_buff->cnt_bits;
991 ptr_rvlc->rvl_bwd_bit_str_idx =
992 it_bit_buff->size - it_bit_buff->cnt_bits + ptr_rvlc->rvlc_sf_len - 1;
993
994 it_bit_buff->cnt_bits -= ptr_rvlc->rvlc_sf_len;
995 it_bit_buff->ptr_read_next =
996 it_bit_buff->ptr_bit_buf_base +
997 ((it_bit_buff->size - it_bit_buff->cnt_bits) >> 3);
998 it_bit_buff->bit_pos = ((it_bit_buff->size - it_bit_buff->cnt_bits) & 7);
999
1000 if (ptr_rvlc->sf_esc_present != 0) {
1001 ptr_rvlc->esc_bit_str_idx = it_bit_buff->size - it_bit_buff->cnt_bits;
1002
1003 it_bit_buff->cnt_bits -= ptr_rvlc->rvlc_esc_len;
1004 it_bit_buff->ptr_read_next =
1005 it_bit_buff->ptr_bit_buf_base +
1006 ((it_bit_buff->size - it_bit_buff->cnt_bits) >> 3);
1007 it_bit_buff->bit_pos = ((it_bit_buff->size - it_bit_buff->cnt_bits) & 7);
1008 }
1009 if (it_bit_buff->cnt_bits < 0) {
1010 return IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES;
1011 } else
1012 return 0;
1013 }
1014
ixheaacd_bi_dir_est_scf_prev_frame_reference(ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info,ia_aac_dec_overlap_info * ptr_aac_dec_static_channel_info)1015 VOID ixheaacd_bi_dir_est_scf_prev_frame_reference(
1016 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
1017 ia_aac_dec_overlap_info *ptr_aac_dec_static_channel_info) {
1018 ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
1019 WORD32 band, bnds, start_band, end_band, group;
1020 WORD32 conceal_min, conceal_max;
1021 WORD32 conceal_group_min, conceal_group_max;
1022 WORD32 max_scf_bands;
1023 WORD32 common_min;
1024
1025 if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
1026 EIGHT_SHORT_SEQUENCE) {
1027 max_scf_bands = 16;
1028 } else {
1029 max_scf_bands = 64;
1030 }
1031
1032 if (ptr_rvlc->conceal_min == CONCEAL_MIN_INIT) ptr_rvlc->conceal_min = 0;
1033
1034 if (ptr_rvlc->conceal_max == CONCEAL_MAX_INIT)
1035 ptr_rvlc->conceal_max =
1036 (ptr_rvlc->num_wind_grps - 1) * 16 + ptr_rvlc->max_sfb_transmitted - 1;
1037
1038 conceal_min = ptr_rvlc->conceal_min % max_scf_bands;
1039 conceal_group_min = ptr_rvlc->conceal_min / max_scf_bands;
1040 conceal_max = ptr_rvlc->conceal_max % max_scf_bands;
1041 conceal_group_max = ptr_rvlc->conceal_max / max_scf_bands;
1042
1043 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[ptr_rvlc->conceal_max] =
1044 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[ptr_rvlc->conceal_max];
1045 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[ptr_rvlc->conceal_min] =
1046 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[ptr_rvlc->conceal_min];
1047
1048 start_band = conceal_min;
1049 if (conceal_group_min == conceal_group_max)
1050 end_band = conceal_max;
1051 else
1052 end_band = ptr_rvlc->max_sfb_transmitted - 1;
1053
1054 for (group = conceal_group_min; group <= conceal_group_max; group++) {
1055 for (band = start_band; band <= end_band; band++) {
1056 bnds = 16 * group + band;
1057 switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
1058 case ZERO_HCB:
1059 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = 0;
1060 break;
1061
1062 case INTENSITY_HCB:
1063 case INTENSITY_HCB2:
1064 if ((ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] ==
1065 INTENSITY_HCB) ||
1066 (ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] ==
1067 INTENSITY_HCB2)) {
1068 common_min = ixheaacd_min32(
1069 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
1070 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
1071 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
1072 common_min,
1073 ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds]);
1074 } else {
1075 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
1076 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
1077 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
1078 }
1079 break;
1080
1081 case NOISE_HCB:
1082 if (ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] ==
1083 NOISE_HCB) {
1084 common_min = ixheaacd_min32(
1085 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
1086 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
1087 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
1088 common_min,
1089 ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds]);
1090 } else {
1091 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
1092 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
1093 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
1094 }
1095 break;
1096
1097 default:
1098 if ((ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
1099 ZERO_HCB) &&
1100 (ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
1101 NOISE_HCB) &&
1102 (ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
1103 INTENSITY_HCB) &&
1104 (ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
1105 INTENSITY_HCB2)) {
1106 common_min = ixheaacd_min32(
1107 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
1108 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
1109 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
1110 common_min,
1111 ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds]);
1112 } else {
1113 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
1114 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
1115 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
1116 }
1117 break;
1118 }
1119 }
1120 start_band = 0;
1121 if ((group + 1) == conceal_group_max) end_band = conceal_max;
1122 }
1123
1124 if (conceal_group_min == 0)
1125 end_band = conceal_min;
1126 else
1127 end_band = ptr_rvlc->max_sfb_transmitted;
1128 for (group = 0; group <= conceal_group_min; group++) {
1129 for (band = 0; band < end_band; band++) {
1130 bnds = 16 * group + band;
1131 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1132 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1133 }
1134 if ((group + 1) == conceal_group_min) end_band = conceal_min;
1135 }
1136
1137 start_band = conceal_max + 1;
1138 for (group = conceal_group_max; group < ptr_rvlc->num_wind_grps; group++) {
1139 for (band = start_band; band < ptr_rvlc->max_sfb_transmitted; band++) {
1140 bnds = 16 * group + band;
1141 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1142 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
1143 }
1144 start_band = 0;
1145 }
1146 }
1147
ixheaacd_calc_ref_val_fwd(ia_rvlc_info_struct * ptr_rvlc,ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info,WORD32 * ref_fwd,WORD32 * ref_nrg_fwd,WORD32 * ref_scf_fwd)1148 static VOID ixheaacd_calc_ref_val_fwd(
1149 ia_rvlc_info_struct *ptr_rvlc,
1150 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD32 *ref_fwd,
1151 WORD32 *ref_nrg_fwd, WORD32 *ref_scf_fwd) {
1152 WORD32 band, bnds, group, start_band;
1153 WORD32 id_is, id_nrg, id_scf;
1154 WORD32 conceal_min, conceal_group_min;
1155 WORD32 max_scf_bands;
1156
1157 if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
1158 EIGHT_SHORT_SEQUENCE)
1159 max_scf_bands = 16;
1160 else
1161 max_scf_bands = 64;
1162
1163 conceal_min = ptr_rvlc->conceal_min % max_scf_bands;
1164 conceal_group_min = ptr_rvlc->conceal_min / max_scf_bands;
1165
1166 id_is = id_nrg = id_scf = 1;
1167
1168 *ref_nrg_fwd = ptr_aac_dec_channel_info->global_gain - 90 - 256;
1169 *ref_scf_fwd = ptr_aac_dec_channel_info->global_gain;
1170
1171 start_band = conceal_min - 1;
1172 for (group = conceal_group_min; group >= 0; group--) {
1173 for (band = start_band; band >= 0; band--) {
1174 bnds = 16 * group + band;
1175 switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
1176 case ZERO_HCB:
1177 break;
1178 case INTENSITY_HCB:
1179 case INTENSITY_HCB2:
1180 if (id_is) {
1181 *ref_fwd = ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1182 id_is = 0;
1183 }
1184 break;
1185 case NOISE_HCB:
1186 if (id_nrg) {
1187 *ref_nrg_fwd = ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1188 id_nrg = 0;
1189 }
1190 break;
1191 default:
1192 if (id_scf) {
1193 *ref_scf_fwd = ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1194 id_scf = 0;
1195 }
1196 break;
1197 }
1198 }
1199 start_band = ptr_rvlc->max_sfb_transmitted - 1;
1200 }
1201 }
1202
ixheaacd_calc_ref_val_bwd(ia_rvlc_info_struct * ptr_rvlc,ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info,WORD32 * ref_bwd,WORD32 * ref_nrg_bwd,WORD32 * ref_scf_bwd)1203 static VOID ixheaacd_calc_ref_val_bwd(
1204 ia_rvlc_info_struct *ptr_rvlc,
1205 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD32 *ref_bwd,
1206 WORD32 *ref_nrg_bwd, WORD32 *ref_scf_bwd) {
1207 WORD32 band, bnds, group, start_band;
1208 WORD32 id_is, id_nrg, id_scf;
1209 WORD32 conceal_max, conceal_group_max;
1210 WORD32 max_scf_bands;
1211
1212 if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
1213 EIGHT_SHORT_SEQUENCE)
1214 max_scf_bands = 16;
1215 else
1216 max_scf_bands = 64;
1217
1218 conceal_max = ptr_rvlc->conceal_max % max_scf_bands;
1219 conceal_group_max = ptr_rvlc->conceal_max / max_scf_bands;
1220
1221 id_is = id_nrg = id_scf = 1;
1222
1223 *ref_bwd = ptr_rvlc->dpcm_is_last_pos;
1224 *ref_nrg_bwd = ptr_rvlc->rev_global_gain + ptr_rvlc->dpcm_noise_last_pos -
1225 90 - 256 + ptr_rvlc->dpcm_noise_nrg;
1226 *ref_scf_bwd = ptr_rvlc->rev_global_gain;
1227
1228 start_band = conceal_max + 1;
1229
1230 for (group = conceal_group_max; group < ptr_rvlc->num_wind_grps; group++) {
1231 for (band = start_band; band < ptr_rvlc->max_sfb_transmitted; band++) {
1232 bnds = 16 * group + band;
1233 switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
1234 case ZERO_HCB:
1235 break;
1236 case INTENSITY_HCB:
1237 case INTENSITY_HCB2:
1238 if (id_is) {
1239 *ref_bwd = ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
1240 id_is = 0;
1241 }
1242 break;
1243 case NOISE_HCB:
1244 if (id_nrg) {
1245 *ref_nrg_bwd = ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
1246 id_nrg = 0;
1247 }
1248 break;
1249 default:
1250 if (id_scf) {
1251 *ref_scf_bwd = ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
1252 id_scf = 0;
1253 }
1254 break;
1255 }
1256 }
1257 start_band = 0;
1258 }
1259 }
1260
ixheaacd_bi_dir_est_lower_scf_cur_frame(ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info)1261 VOID ixheaacd_bi_dir_est_lower_scf_cur_frame(
1262 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info) {
1263 ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
1264 WORD32 band, bnds, start_band, end_band, group;
1265 WORD32 conceal_min, conceal_max;
1266 WORD32 conceal_group_min, conceal_group_max;
1267 WORD32 max_scf_bands;
1268
1269 if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
1270 EIGHT_SHORT_SEQUENCE) {
1271 max_scf_bands = 16;
1272 } else {
1273 max_scf_bands = 64;
1274 }
1275
1276 if (ptr_rvlc->conceal_min == CONCEAL_MIN_INIT) ptr_rvlc->conceal_min = 0;
1277
1278 if (ptr_rvlc->conceal_max == CONCEAL_MAX_INIT)
1279 ptr_rvlc->conceal_max =
1280 (ptr_rvlc->num_wind_grps - 1) * 16 + ptr_rvlc->max_sfb_transmitted - 1;
1281
1282 conceal_min = ptr_rvlc->conceal_min % max_scf_bands;
1283 conceal_group_min = ptr_rvlc->conceal_min / max_scf_bands;
1284 conceal_max = ptr_rvlc->conceal_max % max_scf_bands;
1285 conceal_group_max = ptr_rvlc->conceal_max / max_scf_bands;
1286
1287 if (ptr_rvlc->conceal_min == ptr_rvlc->conceal_max) {
1288 WORD32 ref_fwd = 0, ref_nrg_fwd = 0, ref_scf_fwd = 0;
1289 WORD32 ref_bwd = 0, ref_nrg_bwd = 0, ref_scf_bwd = 0;
1290
1291 bnds = ptr_rvlc->conceal_min;
1292 ixheaacd_calc_ref_val_fwd(ptr_rvlc, ptr_aac_dec_channel_info, &ref_fwd,
1293 &ref_nrg_fwd, &ref_scf_fwd);
1294 ixheaacd_calc_ref_val_bwd(ptr_rvlc, ptr_aac_dec_channel_info, &ref_bwd,
1295 &ref_nrg_bwd, &ref_scf_bwd);
1296
1297 switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
1298 case ZERO_HCB:
1299 break;
1300 case INTENSITY_HCB:
1301 case INTENSITY_HCB2:
1302 if (ref_fwd < ref_bwd)
1303 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ref_fwd;
1304 else
1305 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ref_bwd;
1306 break;
1307 case NOISE_HCB:
1308 if (ref_nrg_fwd < ref_nrg_bwd)
1309 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ref_nrg_fwd;
1310 else
1311 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ref_nrg_bwd;
1312 break;
1313 default:
1314 if (ref_scf_fwd < ref_scf_bwd)
1315 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ref_scf_fwd;
1316 else
1317 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ref_scf_bwd;
1318 break;
1319 }
1320 } else {
1321 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[ptr_rvlc->conceal_max] =
1322 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[ptr_rvlc->conceal_max];
1323 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[ptr_rvlc->conceal_min] =
1324 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[ptr_rvlc->conceal_min];
1325
1326 start_band = conceal_min;
1327 if (conceal_group_min == conceal_group_max)
1328 end_band = conceal_max;
1329 else
1330 end_band = ptr_rvlc->max_sfb_transmitted - 1;
1331
1332 for (group = conceal_group_min; group <= conceal_group_max; group++) {
1333 for (band = start_band; band <= end_band; band++) {
1334 bnds = 16 * group + band;
1335 if (ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds] <
1336 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds])
1337 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1338 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1339 else
1340 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1341 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
1342 }
1343 start_band = 0;
1344 if ((group + 1) == conceal_group_max) end_band = conceal_max;
1345 }
1346 }
1347
1348 if (conceal_group_min == 0)
1349 end_band = conceal_min;
1350 else
1351 end_band = ptr_rvlc->max_sfb_transmitted;
1352 for (group = 0; group <= conceal_group_min; group++) {
1353 for (band = 0; band < end_band; band++) {
1354 bnds = 16 * group + band;
1355 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1356 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1357 }
1358 if ((group + 1) == conceal_group_min) end_band = conceal_min;
1359 }
1360
1361 start_band = conceal_max + 1;
1362 for (group = conceal_group_max; group < ptr_rvlc->num_wind_grps; group++) {
1363 for (band = start_band; band < ptr_rvlc->max_sfb_transmitted; band++) {
1364 bnds = 16 * group + band;
1365 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1366 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
1367 }
1368 start_band = 0;
1369 }
1370 }
1371
ixheaacd_statistical_estimation(ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info)1372 VOID ixheaacd_statistical_estimation(
1373 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info) {
1374 ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
1375 WORD32 band, bnds, group;
1376 WORD32 sum_fwd, sum_bwd;
1377 WORD32 sum_nrg_fwd, sum_nrg_bwd;
1378 WORD32 sum_scf_fwd, sum_scf_bwd;
1379 WORD32 use_fwd, use_nrg_fwd, use_scf_fwd;
1380 WORD32 max_scf_bands;
1381
1382 if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
1383 EIGHT_SHORT_SEQUENCE)
1384 max_scf_bands = 16;
1385 else
1386 max_scf_bands = 64;
1387
1388 sum_fwd = sum_bwd = sum_nrg_fwd = sum_nrg_bwd = sum_scf_fwd = sum_scf_bwd = 0;
1389 use_fwd = use_nrg_fwd = use_scf_fwd = 0;
1390
1391 for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
1392 for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
1393 bnds = 16 * group + band;
1394 switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
1395 case ZERO_HCB:
1396 break;
1397
1398 case INTENSITY_HCB:
1399 case INTENSITY_HCB2:
1400 sum_fwd += ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1401 sum_bwd += ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
1402 break;
1403
1404 case NOISE_HCB:
1405 sum_nrg_fwd += ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1406 sum_nrg_bwd += ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
1407 break;
1408
1409 default:
1410 sum_scf_fwd += ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1411 sum_scf_bwd += ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
1412 break;
1413 }
1414 }
1415 }
1416
1417 if (sum_fwd < sum_bwd) use_fwd = 1;
1418
1419 if (sum_nrg_fwd < sum_nrg_bwd) use_nrg_fwd = 1;
1420
1421 if (sum_scf_fwd < sum_scf_bwd) use_scf_fwd = 1;
1422
1423 for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
1424 for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
1425 bnds = 16 * group + band;
1426 switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
1427 case ZERO_HCB:
1428 break;
1429
1430 case INTENSITY_HCB:
1431 case INTENSITY_HCB2:
1432 if (use_fwd)
1433 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1434 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1435 else
1436 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1437 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
1438 break;
1439
1440 case NOISE_HCB:
1441 if (use_nrg_fwd)
1442 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1443 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1444 else
1445 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1446 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
1447 break;
1448
1449 default:
1450 if (use_scf_fwd)
1451 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1452 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1453 else
1454 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1455 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
1456 break;
1457 }
1458 }
1459 }
1460 }
1461
ixheaacd_predictive_interpolation(ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info,ia_aac_dec_overlap_info * ptr_aac_dec_static_channel_info)1462 VOID ixheaacd_predictive_interpolation(
1463 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
1464 ia_aac_dec_overlap_info *ptr_aac_dec_static_channel_info) {
1465 ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
1466 WORD32 band, bnds, group;
1467 WORD32 max_scf_bands;
1468 WORD32 common_min;
1469
1470 if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
1471 EIGHT_SHORT_SEQUENCE)
1472 max_scf_bands = 16;
1473 else
1474 max_scf_bands = 64;
1475
1476 for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
1477 for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
1478 bnds = 16 * group + band;
1479 switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
1480 case ZERO_HCB:
1481 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = 0;
1482 break;
1483
1484 case INTENSITY_HCB:
1485 case INTENSITY_HCB2:
1486 if ((ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] ==
1487 INTENSITY_HCB) ||
1488 (ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] ==
1489 INTENSITY_HCB2)) {
1490 common_min = ixheaacd_min32(
1491 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
1492 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
1493 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
1494 common_min,
1495 ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds]);
1496 } else {
1497 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = -110;
1498 }
1499 break;
1500
1501 case NOISE_HCB:
1502 if (ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] ==
1503 NOISE_HCB) {
1504 common_min = ixheaacd_min32(
1505 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
1506 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
1507 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
1508 common_min,
1509 ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds]);
1510 } else {
1511 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = -110;
1512 }
1513 break;
1514
1515 default:
1516 if ((ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
1517 ZERO_HCB) &&
1518 (ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
1519 NOISE_HCB) &&
1520 (ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
1521 INTENSITY_HCB) &&
1522 (ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
1523 INTENSITY_HCB2)) {
1524 common_min = ixheaacd_min32(
1525 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
1526 ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
1527 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
1528 common_min,
1529 ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds]);
1530 } else {
1531 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = 0;
1532 }
1533 break;
1534 }
1535 }
1536 }
1537 }
ixheaacd_rvlc_final_error_detection(ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info,ia_aac_dec_overlap_info * ptr_aac_dec_static_channel_info)1538 static VOID ixheaacd_rvlc_final_error_detection(
1539 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
1540 ia_aac_dec_overlap_info *ptr_aac_dec_static_channel_info) {
1541 ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
1542 UWORD8 err_status_complete = 0;
1543 UWORD8 err_status_length_fwd = 0;
1544 UWORD8 err_status_length_bwd = 0;
1545 UWORD8 err_status_length_escape = 0;
1546 UWORD8 err_status_first_scf = 0;
1547 UWORD8 err_status_last_scf = 0;
1548 UWORD8 err_status_first_nrg = 0;
1549 UWORD8 err_status_last_nrg = 0;
1550 UWORD8 err_status_first_is = 0;
1551 UWORD8 err_status_last_is = 0;
1552 UWORD8 err_status_forbidden_cw_fwd = 0;
1553 UWORD8 err_status_forbidden_cw_bwd = 0;
1554 UWORD8 err_status_num_escapes_fwd = 0;
1555 UWORD8 err_status_num_escapes_bwd = 0;
1556 UWORD8 conceal_status = 1;
1557 UWORD8 current_block_type;
1558
1559 ptr_aac_dec_channel_info->rvlc_curr_sf_flag = 1;
1560
1561 if (ptr_rvlc->rvlc_err_log & RVLC_ERROR_FORBIDDEN_CW_DETECTED_FWD)
1562 err_status_forbidden_cw_fwd = 1;
1563
1564 if (ptr_rvlc->rvlc_err_log & RVLC_ERROR_FORBIDDEN_CW_DETECTED_BWD)
1565 err_status_forbidden_cw_bwd = 1;
1566
1567 if (ptr_rvlc->rvlc_sf_fwd_len) err_status_length_fwd = 1;
1568
1569 if (ptr_rvlc->rvlc_sf_bwd_len) err_status_length_bwd = 1;
1570
1571 if (ptr_rvlc->sf_esc_present)
1572 if (ptr_rvlc->rvlc_esc_len) err_status_length_escape = 1;
1573
1574 if (ptr_rvlc->sf_used) {
1575 if (ptr_rvlc->firt_scale_fac != (ptr_aac_dec_channel_info->global_gain))
1576 err_status_first_scf = 1;
1577
1578 if (ptr_rvlc->last_scale_fac != (ptr_rvlc->rev_global_gain))
1579 err_status_last_scf = 1;
1580 }
1581
1582 if (ptr_rvlc->noise_used) {
1583 if (ptr_rvlc->first_nrg != (ptr_aac_dec_channel_info->global_gain +
1584 ptr_rvlc->dpcm_noise_nrg - 90 - 256))
1585 err_status_first_nrg = 1;
1586
1587 if (ptr_rvlc->last_nrg !=
1588 (ptr_rvlc->rev_global_gain + ptr_rvlc->dpcm_noise_last_pos - 90 - 256))
1589 err_status_last_nrg = 1;
1590 }
1591
1592 if (ptr_rvlc->intensity_used) {
1593 if (ptr_rvlc->is_first != 0) err_status_first_is = 1;
1594
1595 if (ptr_rvlc->is_last != (ptr_rvlc->dpcm_is_last_pos))
1596 err_status_last_is = 1;
1597 }
1598
1599 if ((ptr_rvlc->num_fwd_esc_words_decoded !=
1600 ptr_rvlc->num_esc_words_decoded) &&
1601 (ptr_rvlc->conceal_max == CONCEAL_MAX_INIT)) {
1602 err_status_num_escapes_fwd = 1;
1603 }
1604
1605 if ((ptr_rvlc->num_bwd_esc_words_decoded !=
1606 ptr_rvlc->num_esc_words_decoded) &&
1607 (ptr_rvlc->conceal_min == CONCEAL_MIN_INIT)) {
1608 err_status_num_escapes_bwd = 1;
1609 }
1610
1611 if (err_status_length_escape ||
1612 (((ptr_rvlc->conceal_max == CONCEAL_MAX_INIT) &&
1613 (ptr_rvlc->num_fwd_esc_words_decoded !=
1614 ptr_rvlc->num_esc_words_decoded) &&
1615 (err_status_last_scf || err_status_last_nrg || err_status_last_is))
1616
1617 &&
1618
1619 ((ptr_rvlc->conceal_min == CONCEAL_MIN_INIT) &&
1620 (ptr_rvlc->num_bwd_esc_words_decoded !=
1621 ptr_rvlc->num_esc_words_decoded) &&
1622 (err_status_first_scf || err_status_first_nrg ||
1623 err_status_first_is))) ||
1624 ((ptr_rvlc->conceal_max == CONCEAL_MAX_INIT) &&
1625 ((ptr_rvlc->rev_global_gain - ptr_rvlc->last_scale_fac) < -15)) ||
1626 ((ptr_rvlc->conceal_min == CONCEAL_MIN_INIT) &&
1627 ((ptr_aac_dec_channel_info->global_gain - ptr_rvlc->firt_scale_fac) <
1628 -15))) {
1629 if ((ptr_rvlc->conceal_max == CONCEAL_MAX_INIT) ||
1630 (ptr_rvlc->conceal_min == CONCEAL_MIN_INIT)) {
1631 ptr_rvlc->conceal_max = 0;
1632 ptr_rvlc->conceal_min =
1633 ixheaacd_max32(0, (ptr_rvlc->num_wind_grps - 1) * 16 +
1634 ptr_rvlc->max_sfb_transmitted - 1);
1635 } else {
1636 ptr_rvlc->conceal_max =
1637 ixheaacd_min32(ptr_rvlc->conceal_max, ptr_rvlc->conceal_max_esc);
1638 ptr_rvlc->conceal_min =
1639 ixheaacd_max32(ptr_rvlc->conceal_min, ptr_rvlc->conceal_min_esc);
1640 }
1641 }
1642
1643 err_status_complete =
1644 err_status_last_scf || err_status_first_scf || err_status_last_nrg ||
1645 err_status_first_nrg || err_status_last_is || err_status_first_is ||
1646 err_status_forbidden_cw_fwd || err_status_forbidden_cw_bwd ||
1647 err_status_length_fwd || err_status_length_bwd ||
1648 err_status_length_escape || err_status_num_escapes_fwd ||
1649 err_status_num_escapes_bwd;
1650
1651 current_block_type =
1652 (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
1653 EIGHT_SHORT_SEQUENCE)
1654 ? 0
1655 : 1;
1656
1657 if (!err_status_complete) {
1658 WORD32 band;
1659 WORD32 group;
1660 WORD32 bnds;
1661 WORD32 last_sfb_idx;
1662
1663 last_sfb_idx = (ptr_rvlc->num_wind_grps > 1) ? 16 : 64;
1664
1665 for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
1666 for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
1667 bnds = 16 * group + band;
1668 ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
1669 ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds] =
1670 ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
1671 }
1672 }
1673
1674 for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
1675 for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
1676 bnds = 16 * group + band;
1677 ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] =
1678 ptr_aac_dec_channel_info->ptr_code_book[bnds];
1679 }
1680 for (; band < last_sfb_idx; band++) {
1681 bnds = 16 * group + band;
1682 ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] = ZERO_HCB;
1683 }
1684 }
1685 } else {
1686 WORD32 band;
1687 WORD32 group;
1688
1689 if (((ptr_rvlc->conceal_min != CONCEAL_MIN_INIT) ||
1690 (ptr_rvlc->conceal_max != CONCEAL_MAX_INIT)) &&
1691 (ptr_rvlc->conceal_min <= ptr_rvlc->conceal_max) &&
1692 (ptr_aac_dec_static_channel_info->rvlc_prev_blk_type ==
1693 current_block_type) &&
1694 ptr_aac_dec_static_channel_info->rvlc_prev_sf_ok &&
1695 ptr_rvlc->sf_concealment && conceal_status) {
1696 ixheaacd_bi_dir_est_scf_prev_frame_reference(
1697 ptr_aac_dec_channel_info, ptr_aac_dec_static_channel_info);
1698 conceal_status = 0;
1699 }
1700
1701 if ((ptr_rvlc->conceal_min <= ptr_rvlc->conceal_max) &&
1702 ((ptr_rvlc->conceal_min != CONCEAL_MIN_INIT) ||
1703 (ptr_rvlc->conceal_max != CONCEAL_MAX_INIT)) &&
1704 !(ptr_aac_dec_static_channel_info->rvlc_prev_sf_ok &&
1705 ptr_rvlc->sf_concealment &&
1706 (ptr_aac_dec_static_channel_info->rvlc_prev_blk_type ==
1707 current_block_type)) &&
1708 conceal_status) {
1709 ixheaacd_bi_dir_est_lower_scf_cur_frame(ptr_aac_dec_channel_info);
1710 conceal_status = 0;
1711 }
1712
1713 if ((ptr_rvlc->conceal_min <= ptr_rvlc->conceal_max) &&
1714 ((err_status_last_scf && err_status_first_scf) ||
1715 (err_status_last_nrg && err_status_first_nrg) ||
1716 (err_status_last_is && err_status_first_is)) &&
1717 !(err_status_forbidden_cw_fwd || err_status_forbidden_cw_bwd ||
1718 err_status_length_escape) &&
1719 conceal_status) {
1720 ixheaacd_statistical_estimation(ptr_aac_dec_channel_info);
1721 conceal_status = 0;
1722 }
1723
1724 if ((ptr_rvlc->conceal_min <= ptr_rvlc->conceal_max) &&
1725 ptr_aac_dec_static_channel_info->rvlc_prev_sf_ok &&
1726 ptr_rvlc->sf_concealment &&
1727 (ptr_aac_dec_static_channel_info->rvlc_prev_blk_type ==
1728 current_block_type) &&
1729 conceal_status) {
1730 ixheaacd_predictive_interpolation(ptr_aac_dec_channel_info,
1731 ptr_aac_dec_static_channel_info);
1732 conceal_status = 0;
1733 }
1734
1735 if (conceal_status) {
1736 for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
1737 for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
1738 ptr_aac_dec_channel_info->ptr_scale_factor[16 * group + band] = 0;
1739 }
1740 }
1741 ptr_aac_dec_channel_info->rvlc_curr_sf_flag = 0;
1742 }
1743 }
1744 }
1745
ixheaacd_rvlc_dec(ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info,ia_aac_dec_overlap_info * ptr_aac_dec_static_channel_info,ia_bit_buf_struct * it_bit_buff)1746 IA_ERRORCODE ixheaacd_rvlc_dec(
1747 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
1748 ia_aac_dec_overlap_info *ptr_aac_dec_static_channel_info,
1749 ia_bit_buf_struct *it_bit_buff) {
1750 ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
1751 ia_bit_buf_struct saved_it_bit_buff;
1752 IA_ERRORCODE error_code = 0;
1753 error_code =
1754 ixheaacd_rvlc_init(ptr_rvlc, ptr_aac_dec_channel_info, it_bit_buff);
1755 if (error_code) return error_code;
1756
1757 ixheaacd_bitbuf_checkpoint(*it_bit_buff, saved_it_bit_buff);
1758 if (ptr_rvlc->sf_esc_present)
1759 ixheaacd_rvlc_decode_escape(
1760 ptr_rvlc, ptr_aac_dec_channel_info->rvlc_scf_esc_arr, it_bit_buff);
1761
1762 ixheaacd_rvlc_decode_forward(ptr_rvlc, ptr_aac_dec_channel_info, it_bit_buff);
1763 ixheaacd_rvlc_decode_backward(ptr_rvlc, ptr_aac_dec_channel_info,
1764 it_bit_buff);
1765 ixheaacd_rvlc_final_error_detection(ptr_aac_dec_channel_info,
1766 ptr_aac_dec_static_channel_info);
1767
1768 ptr_aac_dec_channel_info->rvlc_intensity_used = ptr_rvlc->intensity_used;
1769 ptr_aac_dec_channel_info->str_pns_info.pns_active = ptr_rvlc->noise_used;
1770
1771 ixheaacd_bitbuf_restore(*it_bit_buff, saved_it_bit_buff);
1772 return error_code;
1773 }
1774