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 <stdio.h>
22 #include <stdlib.h>
23 #include "ixheaacd_sbr_common.h"
24 #include "ixheaacd_type_def.h"
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
33 #include "ixheaacd_error_codes.h"
34 #include "ixheaacd_defines.h"
35 #include "ixheaacd_aac_rom.h"
36 #include "ixheaacd_common_rom.h"
37 #include "ixheaacd_basic_funcs.h"
38 #include "ixheaacd_aac_imdct.h"
39 #include "ixheaacd_basic_op.h"
40 #include "ixheaacd_intrinsics.h"
41
42 #include "ixheaacd_pulsedata.h"
43
44 #include "ixheaacd_pns.h"
45 #include "ixheaacd_drc_data_struct.h"
46
47 #include "ixheaacd_lt_predict.h"
48 #include "ixheaacd_cnst.h"
49 #include "ixheaacd_ec_defines.h"
50 #include "ixheaacd_ec_struct_def.h"
51 #include "ixheaacd_channelinfo.h"
52 #include "ixheaacd_drc_dec.h"
53 #include "ixheaacd_sbrdecoder.h"
54 #include "ixheaacd_block.h"
55
56 #include "ixheaacd_channel.h"
57
58 #include "ixheaacd_audioobjtypes.h"
59 #include "ixheaacd_latmdemux.h"
60 #include "ixheaacd_aacdec.h"
61 #include "ixheaacd_tns.h"
62 #include "ixheaacd_function_selector.h"
63
ixheaacd_is_correlation(ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info,WORD16 pns_band)64 static PLATFORM_INLINE WORD16 ixheaacd_is_correlation(
65 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD16 pns_band) {
66 ia_pns_correlation_info_struct *ptr_corr_info =
67 ptr_aac_dec_channel_info->pstr_pns_corr_info;
68
69 return ((ptr_corr_info->correlated[(pns_band >> PNS_BAND_FLAGS_SHIFT)] >>
70 (pns_band & PNS_BAND_FLAGS_MASK)) &
71 1);
72 }
73
ixheaacd_gen_rand_vec(WORD32 scale,WORD shift,WORD32 * ptr_spec_coef,WORD32 sfb_width,WORD32 * seed)74 VOID ixheaacd_gen_rand_vec(WORD32 scale, WORD shift, WORD32 *ptr_spec_coef,
75 WORD32 sfb_width, WORD32 *seed) {
76 WORD nrg_scale;
77 WORD32 nrg = 0;
78 WORD32 *spec = ptr_spec_coef;
79 WORD32 sfb;
80
81 for (sfb = 0; sfb <= sfb_width; sfb++) {
82 *seed = (WORD32)(((WORD64)1664525 * (WORD64)(*seed)) + (WORD64)1013904223);
83
84 *spec = (*seed >> 3);
85
86 nrg = ixheaacd_add32_sat(nrg, ixheaacd_mult32_shl_sat(*spec, *spec));
87
88 spec++;
89 }
90
91 nrg_scale = ixheaacd_norm32(nrg);
92
93 if (nrg_scale > 0) {
94 nrg_scale &= ~1;
95 nrg = ixheaacd_shl32_sat(nrg, nrg_scale);
96 shift = shift - (nrg_scale >> 1);
97 }
98
99 nrg = ixheaacd_sqrt(nrg);
100 scale = ixheaacd_div32_pos_normb(scale, nrg);
101
102 spec = ptr_spec_coef;
103
104 for (sfb = 0; sfb <= sfb_width; sfb++) {
105 *spec = ixheaacd_shr32_dir_sat_limit(ixheaacd_mult32_shl_sat(*spec, scale),
106 shift);
107 spec++;
108 }
109 }
110
ixheaacd_pns_process(ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info[],WORD32 channel,ia_aac_dec_tables_struct * ptr_aac_tables)111 VOID ixheaacd_pns_process(
112 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info[], WORD32 channel,
113 ia_aac_dec_tables_struct *ptr_aac_tables) {
114 ia_pns_info_struct *ptr_pns_info =
115 &ptr_aac_dec_channel_info[channel]->str_pns_info;
116 ia_ics_info_struct *ptr_ics_info =
117 &ptr_aac_dec_channel_info[channel]->str_ics_info;
118 WORD16 maximum_bins_short = ptr_ics_info->frame_length >> 3;
119 WORD32 *ptr_scale_mant_tab =
120 ptr_aac_tables->pstr_block_tables->scale_mant_tab;
121
122 if (ptr_pns_info->pns_active) {
123 const WORD16 *swb_offset =
124 ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence]
125 .sfb_index;
126
127 WORD num_win_group, grp_len, sfb;
128 WORD32 *spec = &ptr_aac_dec_channel_info[channel]->ptr_spec_coeff[0];
129
130 for (num_win_group = 0; num_win_group < ptr_ics_info->num_window_groups;
131 num_win_group++) {
132 grp_len = ptr_ics_info->window_group_length[num_win_group];
133
134 for (grp_len = 0;
135 grp_len < ptr_ics_info->window_group_length[num_win_group];
136 grp_len++) {
137 for (sfb = 0; sfb < ptr_ics_info->max_sfb; sfb++) {
138 WORD16 pns_band = ((num_win_group << 4) + sfb);
139
140 if (ptr_aac_dec_channel_info[channel]
141 ->str_pns_info.pns_used[pns_band]) {
142 WORD32 scale_mant;
143 WORD32 scale_exp;
144 WORD32 sfb_width = swb_offset[sfb + 1] - swb_offset[sfb] - 1;
145 WORD32 *ptr_spec = &spec[swb_offset[sfb]];
146
147 scale_mant = ptr_scale_mant_tab[ptr_aac_dec_channel_info[channel]
148 ->ptr_scale_factor[pns_band] &
149 PNS_SCALE_MANT_TAB_MASK];
150 scale_exp = add_d(sub_d(31, (ptr_aac_dec_channel_info[channel]
151 ->ptr_scale_factor[pns_band] >>
152 PNS_SCALEFACTOR_SCALING)),
153 PNS_SCALE_MANT_TAB_SCALING);
154
155 if (ixheaacd_is_correlation(ptr_aac_dec_channel_info[LEFT],
156 pns_band)) {
157 if (channel == 0) {
158 ptr_aac_dec_channel_info[LEFT]
159 ->pstr_pns_corr_info->random_vector[pns_band] =
160 ptr_aac_dec_channel_info[LEFT]
161 ->pstr_pns_rand_vec_data->current_seed;
162
163 ixheaacd_gen_rand_vec(
164 scale_mant, scale_exp, ptr_spec, sfb_width,
165 &(ptr_aac_dec_channel_info[LEFT]
166 ->pstr_pns_rand_vec_data->current_seed));
167 }
168
169 else {
170 ixheaacd_gen_rand_vec(
171 scale_mant, scale_exp, ptr_spec, sfb_width,
172 &(ptr_aac_dec_channel_info[LEFT]
173 ->pstr_pns_corr_info->random_vector[pns_band]));
174 }
175
176 }
177
178 else {
179 ixheaacd_gen_rand_vec(
180 scale_mant, scale_exp, ptr_spec, sfb_width,
181 &(ptr_aac_dec_channel_info[LEFT]
182 ->pstr_pns_rand_vec_data->current_seed));
183 }
184 }
185 }
186
187 if (maximum_bins_short == 120)
188 spec += maximum_bins_short;
189 else
190 spec += 128;
191 }
192 }
193 }
194
195 if (channel == 0) {
196 ptr_aac_dec_channel_info[0]->pstr_pns_rand_vec_data->pns_frame_number++;
197 }
198 }
199
ixheaacd_tns_decode_coef(const ia_filter_info_struct * filter,WORD16 * parcor_coef,ia_aac_dec_tables_struct * ptr_aac_tables)200 VOID ixheaacd_tns_decode_coef(const ia_filter_info_struct *filter,
201 WORD16 *parcor_coef,
202 ia_aac_dec_tables_struct *ptr_aac_tables) {
203 WORD order, resolution;
204 WORD16 *ptr_par_coef = parcor_coef;
205 WORD16 *tns_coeff_ptr;
206 WORD8 ixheaacd_drc_offset = 4;
207 WORD8 *ptr_coef = (WORD8 *)filter->coef;
208
209 resolution = filter->resolution;
210 tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff3_16;
211
212 if (resolution) {
213 tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff4_16;
214 ixheaacd_drc_offset = ixheaacd_drc_offset << 1;
215 }
216
217 for (order = 0; order < filter->order; order++) {
218 WORD8 temp = *ptr_coef++;
219 *ptr_par_coef++ = tns_coeff_ptr[temp + ixheaacd_drc_offset];
220 }
221 }
222
ixheaacd_tns_decode_coef_ld(const ia_filter_info_struct * filter,WORD32 * parcor_coef,ia_aac_dec_tables_struct * ptr_aac_tables)223 VOID ixheaacd_tns_decode_coef_ld(const ia_filter_info_struct *filter,
224 WORD32 *parcor_coef,
225 ia_aac_dec_tables_struct *ptr_aac_tables) {
226 WORD order, resolution;
227 WORD32 *ptr_par_coef = parcor_coef;
228 WORD32 *tns_coeff_ptr;
229 WORD8 offset = 4;
230 WORD8 *ptr_coef = (WORD8 *)filter->coef;
231
232 resolution = filter->resolution;
233 tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff3;
234
235 if (resolution) {
236 tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff4;
237 offset = offset << 1;
238 }
239
240 for (order = 0; order < filter->order; order++) {
241 WORD8 temp = *ptr_coef++;
242 *ptr_par_coef++ = tns_coeff_ptr[temp + offset];
243 }
244 }
245
ixheaacd_aac_tns_process(ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info,WORD32 num_ch,ia_aac_dec_tables_struct * ptr_aac_tables,WORD32 object_type,WORD32 ar_flag,WORD32 * predicted_spectrum)246 VOID ixheaacd_aac_tns_process(
247 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD32 num_ch,
248 ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 object_type,
249 WORD32 ar_flag, WORD32 *predicted_spectrum) {
250 WORD i;
251 WORD16 scale_lpc;
252
253 ia_tns_info_aac_struct *ptr_tns_info =
254 &ptr_aac_dec_channel_info->str_tns_info;
255 WORD32 *spec = ptr_aac_dec_channel_info->ptr_spec_coeff;
256 WORD32 *scratch_buf = ptr_aac_dec_channel_info->scratch_buf_ptr;
257
258 WORD win, filt, start, stop, size, scale_spec;
259 ia_ics_info_struct *ptr_ics_info = &ptr_aac_dec_channel_info->str_ics_info;
260 WORD num_window, tns_max_bands, win_seq;
261 WORD16 maximum_bins_short = ptr_ics_info->frame_length >> 3;
262 WORD position;
263
264 WORD32 parcor_coef[MAX_ORDER + 1];
265 WORD16 parcor_coef_16[MAX_ORDER + 1];
266
267 WORD32 lpc_coef[MAX_ORDER + 1];
268 WORD16 lpc_coef_16[MAX_ORDER + 1];
269
270 const WORD16 *ptr_sfb_table;
271
272 WORD16 max_bin_long = ptr_ics_info->frame_length;
273
274 win_seq = ptr_ics_info->window_sequence == 0
275 ? 0
276 : (ptr_ics_info->window_sequence % 2 == 0);
277
278 if (ar_flag)
279 spec = ptr_aac_dec_channel_info->ptr_spec_coeff;
280 else {
281 spec = predicted_spectrum;
282 }
283
284 if (object_type == AOT_ER_AAC_ELD || object_type == AOT_ER_AAC_LD ||
285 object_type == AOT_AAC_LTP) {
286 if (512 == ptr_ics_info->frame_length) {
287 tns_max_bands =
288 ptr_aac_tables->pstr_block_tables
289 ->tns_max_bands_tbl_ld[ptr_ics_info->sampling_rate_index];
290 win_seq = 1;
291 num_window = win_seq;
292 } else if (480 == ptr_ics_info->frame_length) {
293 tns_max_bands =
294 ptr_aac_tables->pstr_block_tables
295 ->tns_max_bands_tbl_480[ptr_ics_info->sampling_rate_index];
296 win_seq = 1;
297 num_window = win_seq;
298 } else {
299 tns_max_bands =
300 ptr_aac_tables->pstr_block_tables
301 ->tns_max_bands_tbl[ptr_ics_info->sampling_rate_index][win_seq];
302
303 num_window = win_seq ? 8 : 1;
304 }
305 } else {
306 tns_max_bands =
307 ptr_aac_tables->pstr_block_tables
308 ->tns_max_bands_tbl[ptr_ics_info->sampling_rate_index][win_seq];
309
310 num_window = win_seq ? 8 : 1;
311 }
312
313 ptr_sfb_table =
314 ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence].sfb_index;
315
316 for (win = 0; win < num_window; win++) {
317 WORD n_filt = ptr_tns_info->n_filt[win];
318
319 for (filt = 0; filt < n_filt; filt++) {
320 ia_filter_info_struct *filter = &ptr_tns_info->str_filter[win][filt];
321
322 if (filter->order <= 0) {
323 continue;
324 }
325
326 if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
327 (num_ch > 2)) {
328 ixheaacd_tns_decode_coefficients(filter, parcor_coef, ptr_aac_tables);
329
330 } else {
331 ixheaacd_tns_decode_coef(filter, parcor_coef_16, ptr_aac_tables);
332 }
333
334 start = ixheaacd_min32(ixheaacd_min32(filter->start_band, tns_max_bands),
335 ptr_ics_info->max_sfb);
336
337 start = ptr_sfb_table[start];
338
339 stop = ixheaacd_min32(ixheaacd_min32(filter->stop_band, tns_max_bands),
340 ptr_ics_info->max_sfb);
341
342 stop = ptr_sfb_table[stop];
343
344 size = (stop - start);
345
346 if (size <= 0) {
347 continue;
348 }
349 if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
350 (num_ch > 2)) {
351 ixheaacd_tns_parcor_to_lpc(parcor_coef, lpc_coef, &scale_lpc,
352 filter->order);
353
354 } else {
355 (*ixheaacd_tns_parcor_lpc_convert)(parcor_coef_16, lpc_coef_16,
356 &scale_lpc, filter->order);
357 }
358
359 {
360 WORD32 *ptr_tmp;
361
362 if (maximum_bins_short == 120)
363 ptr_tmp = spec + (win * maximum_bins_short) + start;
364 else
365 ptr_tmp = spec + (win << 7) + start;
366
367 scale_spec = (*ixheaacd_calc_max_spectral_line)(ptr_tmp, size);
368 }
369
370 if (filter->direction == -1) {
371 position = stop - 1;
372
373 if (maximum_bins_short == 120) {
374 if (((win * maximum_bins_short) + position) < filter->order) continue;
375 } else {
376 if (((win << 7) + position) < filter->order) continue;
377 }
378
379 } else {
380 position = start;
381 if (maximum_bins_short == 120) {
382 if ((((win * maximum_bins_short) + position) + filter->order) > max_bin_long)
383 continue;
384 } else {
385 if ((((win << 7) + position) + filter->order) > MAX_BINS_LONG) continue;
386 }
387 }
388
389 if ((num_ch <= 2) &&
390 ((object_type != AOT_ER_AAC_LD) && (object_type != AOT_AAC_LTP)))
391 scale_spec = ((scale_spec - 4) - scale_lpc);
392 else {
393 if (scale_spec > 17)
394 scale_spec = ((scale_spec - 6) - scale_lpc);
395 else if (scale_spec > 11)
396 scale_spec = ((scale_spec - 5) - scale_lpc);
397 else
398 scale_spec = ((scale_spec - 4) - scale_lpc);
399 }
400
401 if (scale_spec > 0) {
402 scale_spec = ixheaacd_min32(scale_spec, 31);
403
404 if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
405 (num_ch > 2)) {
406 if (ar_flag)
407 {
408 if (maximum_bins_short == 120) {
409 (*ixheaacd_tns_ar_filter_fixed)(&spec[(win * maximum_bins_short) + position],
410 size, filter->direction,
411 (WORD32 *)lpc_coef, filter->order,
412 (WORD32)scale_lpc, scale_spec);
413 } else {
414 (*ixheaacd_tns_ar_filter_fixed)(&spec[(win << 7) + position], size,
415 filter->direction,
416 (WORD32 *)lpc_coef, filter->order,
417 (WORD32)scale_lpc, scale_spec);
418 }
419 } else {
420 if (maximum_bins_short == 120) {
421 ixheaacd_tns_ma_filter_fixed_ld(&spec[(win * maximum_bins_short) + position],
422 size, filter->direction, lpc_coef,
423 filter->order, scale_lpc);
424 } else {
425 ixheaacd_tns_ma_filter_fixed_ld(&spec[(win << 7) + position], size,
426 filter->direction, lpc_coef,
427 filter->order, scale_lpc);
428 }
429 }
430 } else {
431 if (object_type == AOT_ER_AAC_ELD) scale_spec = scale_spec - 1;
432 if (maximum_bins_short == 120) {
433 (*ixheaacd_tns_ar_filter)(&spec[(win * maximum_bins_short) + position], size,
434 filter->direction, lpc_coef_16,
435 filter->order, (WORD32)scale_lpc,
436 scale_spec, scratch_buf);
437 } else {
438 (*ixheaacd_tns_ar_filter)(&spec[(win << 7) + position], size,
439 filter->direction, lpc_coef_16,
440 filter->order, (WORD32)scale_lpc,
441 scale_spec, scratch_buf);
442 }
443 }
444 }
445
446 else {
447 WORD32 *ptr_tmp;
448
449 if (maximum_bins_short == 120)
450 ptr_tmp = spec + (win * maximum_bins_short) + start;
451 else
452 ptr_tmp = spec + (win >> 7) + start;
453
454 scale_spec = -scale_spec;
455 scale_spec = ixheaacd_min32(scale_spec, 31);
456
457 for (i = size; i != 0; i--) {
458 *ptr_tmp = (*ptr_tmp >> scale_spec);
459 ptr_tmp++;
460 }
461
462 if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
463 num_ch > 2) {
464 if (ar_flag) {
465 if (maximum_bins_short == 120) {
466 (*ixheaacd_tns_ar_filter_fixed)(
467 &spec[(win * maximum_bins_short) + position], size, filter->direction,
468 (WORD32 *)lpc_coef, filter->order, scale_lpc, 0);
469 } else {
470 (*ixheaacd_tns_ar_filter_fixed)(
471 &spec[(win << 7) + position], size, filter->direction,
472 (WORD32 *)lpc_coef, filter->order, scale_lpc, 0);
473 }
474 } else {
475 if (maximum_bins_short == 120) {
476 ixheaacd_tns_ma_filter_fixed_ld(&spec[(win * maximum_bins_short) + position],
477 size, filter->direction, lpc_coef,
478 filter->order, scale_lpc);
479 } else {
480 ixheaacd_tns_ma_filter_fixed_ld(&spec[(win << 7) + position], size,
481 filter->direction, lpc_coef,
482 filter->order, scale_lpc);
483 }
484 }
485 } else {
486 if (object_type == AOT_ER_AAC_ELD) {
487 scale_lpc = scale_lpc - 1;
488 }
489
490 if (maximum_bins_short == 120) {
491 (*ixheaacd_tns_ar_filter)(&spec[(win * maximum_bins_short) + position], size,
492 filter->direction, lpc_coef_16,
493 filter->order, scale_lpc, 0, scratch_buf);
494 } else {
495 (*ixheaacd_tns_ar_filter)(&spec[(win << 7) + position], size,
496 filter->direction, lpc_coef_16,
497 filter->order, scale_lpc, 0, scratch_buf);
498 }
499 }
500
501 if (maximum_bins_short == 120)
502 ptr_tmp = spec + (win * maximum_bins_short) + start;
503 else
504 ptr_tmp = spec + (win << 7) + start;
505
506 for (i = size; i != 0; i--) {
507 *ptr_tmp = (*ptr_tmp << scale_spec);
508 ptr_tmp++;
509 }
510 }
511 }
512 }
513 }