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 "ixheaac_type_def.h"
25 #include "ixheaac_constants.h"
26 #include "ixheaac_basic_ops32.h"
27 #include "ixheaac_basic_ops16.h"
28 #include "ixheaac_basic_ops40.h"
29 #include "ixheaac_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 "ixheaac_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 = ixheaac_add32_sat(nrg, ixheaac_mult32_shl_sat(*spec, *spec));
87
88 spec++;
89 }
90
91 nrg_scale = ixheaac_norm32(nrg);
92
93 if (nrg_scale > 0) {
94 nrg_scale &= ~1;
95 nrg = ixheaac_shl32_sat(nrg, nrg_scale);
96 shift = shift - (nrg_scale >> 1);
97 }
98
99 nrg = ixheaacd_sqrt(nrg);
100 scale = ixheaac_div32_pos_normb(scale, nrg);
101
102 spec = ptr_spec_coef;
103
104 if (shift < -31) {
105 shift = -31;
106 }
107 for (sfb = 0; sfb <= sfb_width; sfb++) {
108 *spec = ixheaac_shr32_dir_sat_limit(ixheaac_mult32_shl_sat(*spec, scale),
109 shift);
110 spec++;
111 }
112 }
113
ixheaacd_pns_process(ia_aac_dec_channel_info_struct * ptr_aac_dec_channel_info[],WORD32 channel,ia_aac_dec_tables_struct * ptr_aac_tables)114 VOID ixheaacd_pns_process(
115 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info[], WORD32 channel,
116 ia_aac_dec_tables_struct *ptr_aac_tables) {
117 ia_pns_info_struct *ptr_pns_info =
118 &ptr_aac_dec_channel_info[channel]->str_pns_info;
119 ia_ics_info_struct *ptr_ics_info =
120 &ptr_aac_dec_channel_info[channel]->str_ics_info;
121 WORD16 maximum_bins_short = ptr_ics_info->frame_length >> 3;
122 WORD32 *ptr_scale_mant_tab =
123 ptr_aac_tables->pstr_block_tables->scale_mant_tab;
124
125 if (ptr_pns_info->pns_active) {
126 const WORD16 *swb_offset =
127 ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence]
128 .sfb_index;
129
130 WORD num_win_group, grp_len, sfb;
131 WORD32 *spec = &ptr_aac_dec_channel_info[channel]->ptr_spec_coeff[0];
132
133 for (num_win_group = 0; num_win_group < ptr_ics_info->num_window_groups;
134 num_win_group++) {
135 grp_len = ptr_ics_info->window_group_length[num_win_group];
136
137 for (grp_len = 0;
138 grp_len < ptr_ics_info->window_group_length[num_win_group];
139 grp_len++) {
140 for (sfb = 0; sfb < ptr_ics_info->max_sfb; sfb++) {
141 WORD16 pns_band = ((num_win_group << 4) + sfb);
142
143 if (ptr_aac_dec_channel_info[channel]
144 ->str_pns_info.pns_used[pns_band]) {
145 WORD32 scale_mant;
146 WORD32 scale_exp;
147 WORD32 sfb_width = swb_offset[sfb + 1] - swb_offset[sfb] - 1;
148 WORD32 *ptr_spec = &spec[swb_offset[sfb]];
149
150 scale_mant = ptr_scale_mant_tab[ptr_aac_dec_channel_info[channel]
151 ->ptr_scale_factor[pns_band] &
152 PNS_SCALE_MANT_TAB_MASK];
153 scale_exp = add_d(sub_d(31, (ptr_aac_dec_channel_info[channel]
154 ->ptr_scale_factor[pns_band] >>
155 PNS_SCALEFACTOR_SCALING)),
156 PNS_SCALE_MANT_TAB_SCALING);
157
158 if (ixheaacd_is_correlation(ptr_aac_dec_channel_info[LEFT],
159 pns_band)) {
160 if (channel == 0) {
161 ptr_aac_dec_channel_info[LEFT]
162 ->pstr_pns_corr_info->random_vector[pns_band] =
163 ptr_aac_dec_channel_info[LEFT]
164 ->pstr_pns_rand_vec_data->current_seed;
165
166 ixheaacd_gen_rand_vec(
167 scale_mant, scale_exp, ptr_spec, sfb_width,
168 &(ptr_aac_dec_channel_info[LEFT]
169 ->pstr_pns_rand_vec_data->current_seed));
170 }
171
172 else {
173 ixheaacd_gen_rand_vec(
174 scale_mant, scale_exp, ptr_spec, sfb_width,
175 &(ptr_aac_dec_channel_info[LEFT]
176 ->pstr_pns_corr_info->random_vector[pns_band]));
177 }
178
179 }
180
181 else {
182 ixheaacd_gen_rand_vec(
183 scale_mant, scale_exp, ptr_spec, sfb_width,
184 &(ptr_aac_dec_channel_info[LEFT]
185 ->pstr_pns_rand_vec_data->current_seed));
186 }
187 }
188 }
189
190 if (maximum_bins_short == 120)
191 spec += maximum_bins_short;
192 else
193 spec += 128;
194 }
195 }
196 }
197
198 if (channel == 0) {
199 ptr_aac_dec_channel_info[0]->pstr_pns_rand_vec_data->pns_frame_number++;
200 }
201 }
202
ixheaacd_tns_decode_coef(const ia_filter_info_struct * filter,WORD16 * parcor_coef,ia_aac_dec_tables_struct * ptr_aac_tables)203 VOID ixheaacd_tns_decode_coef(const ia_filter_info_struct *filter,
204 WORD16 *parcor_coef,
205 ia_aac_dec_tables_struct *ptr_aac_tables) {
206 WORD order, resolution;
207 WORD16 *ptr_par_coef = parcor_coef;
208 WORD16 *tns_coeff_ptr;
209 WORD8 ixheaacd_drc_offset = 4;
210 WORD8 *ptr_coef = (WORD8 *)filter->coef;
211
212 resolution = filter->resolution;
213 tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff3_16;
214
215 if (resolution) {
216 tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff4_16;
217 ixheaacd_drc_offset = ixheaacd_drc_offset << 1;
218 }
219
220 for (order = 0; order < filter->order; order++) {
221 WORD8 temp = *ptr_coef++;
222 *ptr_par_coef++ = tns_coeff_ptr[temp + ixheaacd_drc_offset];
223 }
224 }
225
ixheaacd_tns_decode_coef_ld(const ia_filter_info_struct * filter,WORD32 * parcor_coef,ia_aac_dec_tables_struct * ptr_aac_tables)226 VOID ixheaacd_tns_decode_coef_ld(const ia_filter_info_struct *filter,
227 WORD32 *parcor_coef,
228 ia_aac_dec_tables_struct *ptr_aac_tables) {
229 WORD order, resolution;
230 WORD32 *ptr_par_coef = parcor_coef;
231 WORD32 *tns_coeff_ptr;
232 WORD8 offset = 4;
233 WORD8 *ptr_coef = (WORD8 *)filter->coef;
234
235 resolution = filter->resolution;
236 tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff3;
237
238 if (resolution) {
239 tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff4;
240 offset = offset << 1;
241 }
242
243 for (order = 0; order < filter->order; order++) {
244 WORD8 temp = *ptr_coef++;
245 *ptr_par_coef++ = tns_coeff_ptr[temp + offset];
246 }
247 }
248
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)249 VOID ixheaacd_aac_tns_process(
250 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD32 num_ch,
251 ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 object_type,
252 WORD32 ar_flag, WORD32 *predicted_spectrum) {
253 WORD i;
254 WORD16 scale_lpc;
255
256 ia_tns_info_aac_struct *ptr_tns_info =
257 &ptr_aac_dec_channel_info->str_tns_info;
258 WORD32 *spec = ptr_aac_dec_channel_info->ptr_spec_coeff;
259 WORD32 *scratch_buf = ptr_aac_dec_channel_info->scratch_buf_ptr;
260
261 WORD win, filt, start, stop, size, scale_spec;
262 ia_ics_info_struct *ptr_ics_info = &ptr_aac_dec_channel_info->str_ics_info;
263 WORD num_window, tns_max_bands, win_seq;
264 WORD16 maximum_bins_short = ptr_ics_info->frame_length >> 3;
265 WORD position;
266
267 WORD32 parcor_coef[MAX_ORDER + 1];
268 WORD16 parcor_coef_16[MAX_ORDER + 1];
269
270 WORD32 lpc_coef[MAX_ORDER + 1];
271 WORD16 lpc_coef_16[MAX_ORDER + 1];
272
273 const WORD16 *ptr_sfb_table;
274
275 WORD16 max_bin_long = ptr_ics_info->frame_length;
276
277 win_seq = ptr_ics_info->window_sequence == 0
278 ? 0
279 : (ptr_ics_info->window_sequence % 2 == 0);
280
281 if (ar_flag)
282 spec = ptr_aac_dec_channel_info->ptr_spec_coeff;
283 else {
284 spec = predicted_spectrum;
285 }
286
287 if (object_type == AOT_ER_AAC_ELD || object_type == AOT_ER_AAC_LD ||
288 object_type == AOT_AAC_LTP) {
289 if (512 == ptr_ics_info->frame_length) {
290 tns_max_bands =
291 ptr_aac_tables->pstr_block_tables
292 ->tns_max_bands_tbl_ld[ptr_ics_info->sampling_rate_index];
293 win_seq = 1;
294 num_window = win_seq;
295 } else if (480 == ptr_ics_info->frame_length) {
296 tns_max_bands =
297 ptr_aac_tables->pstr_block_tables
298 ->tns_max_bands_tbl_480[ptr_ics_info->sampling_rate_index];
299 win_seq = 1;
300 num_window = win_seq;
301 } else {
302 tns_max_bands =
303 ptr_aac_tables->pstr_block_tables
304 ->tns_max_bands_tbl[ptr_ics_info->sampling_rate_index][win_seq];
305
306 num_window = win_seq ? 8 : 1;
307 }
308 } else {
309 tns_max_bands =
310 ptr_aac_tables->pstr_block_tables
311 ->tns_max_bands_tbl[ptr_ics_info->sampling_rate_index][win_seq];
312
313 num_window = win_seq ? 8 : 1;
314 }
315
316 ptr_sfb_table =
317 ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence].sfb_index;
318
319 for (win = 0; win < num_window; win++) {
320 WORD n_filt = ptr_tns_info->n_filt[win];
321
322 for (filt = 0; filt < n_filt; filt++) {
323 ia_filter_info_struct *filter = &ptr_tns_info->str_filter[win][filt];
324
325 if (filter->order <= 0) {
326 continue;
327 }
328
329 if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
330 (num_ch > 2)) {
331 ixheaacd_tns_decode_coefficients(filter, parcor_coef, ptr_aac_tables);
332
333 } else {
334 ixheaacd_tns_decode_coef(filter, parcor_coef_16, ptr_aac_tables);
335 }
336
337 start = ixheaac_min32(ixheaac_min32(filter->start_band, tns_max_bands),
338 ptr_ics_info->max_sfb);
339
340 start = ptr_sfb_table[start];
341
342 stop = ixheaac_min32(ixheaac_min32(filter->stop_band, tns_max_bands),
343 ptr_ics_info->max_sfb);
344
345 stop = ptr_sfb_table[stop];
346
347 size = (stop - start);
348
349 if (size <= 0) {
350 continue;
351 }
352 if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
353 (num_ch > 2)) {
354 ixheaacd_tns_parcor_to_lpc(parcor_coef, lpc_coef, &scale_lpc,
355 filter->order);
356
357 } else {
358 (*ixheaacd_tns_parcor_lpc_convert)(parcor_coef_16, lpc_coef_16,
359 &scale_lpc, filter->order);
360 }
361
362 {
363 WORD32 *ptr_tmp;
364
365 if (maximum_bins_short == 120)
366 ptr_tmp = spec + (win * maximum_bins_short) + start;
367 else
368 ptr_tmp = spec + (win << 7) + start;
369
370 scale_spec = (*ixheaacd_calc_max_spectral_line)(ptr_tmp, size);
371 }
372
373 if (filter->direction == -1) {
374 position = stop - 1;
375
376 if (maximum_bins_short == 120) {
377 if (((win * maximum_bins_short) + position) < filter->order) continue;
378 } else {
379 if (((win << 7) + position) < filter->order) continue;
380 }
381
382 } else {
383 position = start;
384 if (maximum_bins_short == 120) {
385 if ((((win * maximum_bins_short) + position) + filter->order) > max_bin_long)
386 continue;
387 } else {
388 if ((((win << 7) + position) + filter->order) > MAX_BINS_LONG) continue;
389 }
390 }
391
392 if ((num_ch <= 2) &&
393 ((object_type != AOT_ER_AAC_LD) && (object_type != AOT_AAC_LTP)))
394 scale_spec = ((scale_spec - 4) - scale_lpc);
395 else {
396 if (scale_spec > 17)
397 scale_spec = ((scale_spec - 6) - scale_lpc);
398 else if (scale_spec > 11)
399 scale_spec = ((scale_spec - 5) - scale_lpc);
400 else
401 scale_spec = ((scale_spec - 4) - scale_lpc);
402 }
403
404 if (scale_spec > 0) {
405 scale_spec = ixheaac_min32(scale_spec, 31);
406
407 if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
408 (num_ch > 2)) {
409 if (ar_flag)
410 {
411 if (maximum_bins_short == 120) {
412 (*ixheaacd_tns_ar_filter_fixed)(&spec[(win * maximum_bins_short) + position],
413 size, filter->direction,
414 (WORD32 *)lpc_coef, filter->order,
415 (WORD32)scale_lpc, scale_spec);
416 } else {
417 (*ixheaacd_tns_ar_filter_fixed)(&spec[(win << 7) + position], size,
418 filter->direction,
419 (WORD32 *)lpc_coef, filter->order,
420 (WORD32)scale_lpc, scale_spec);
421 }
422 } else {
423 if (maximum_bins_short == 120) {
424 ixheaacd_tns_ma_filter_fixed_ld(&spec[(win * maximum_bins_short) + position],
425 size, filter->direction, lpc_coef,
426 filter->order, scale_lpc);
427 } else {
428 ixheaacd_tns_ma_filter_fixed_ld(&spec[(win << 7) + position], size,
429 filter->direction, lpc_coef,
430 filter->order, scale_lpc);
431 }
432 }
433 } else {
434 if (object_type == AOT_ER_AAC_ELD) scale_spec = scale_spec - 1;
435 if (maximum_bins_short == 120) {
436 (*ixheaacd_tns_ar_filter)(&spec[(win * maximum_bins_short) + position], size,
437 filter->direction, lpc_coef_16,
438 filter->order, (WORD32)scale_lpc,
439 scale_spec, scratch_buf);
440 } else {
441 (*ixheaacd_tns_ar_filter)(&spec[(win << 7) + position], size,
442 filter->direction, lpc_coef_16,
443 filter->order, (WORD32)scale_lpc,
444 scale_spec, scratch_buf);
445 }
446 }
447 }
448
449 else {
450 WORD32 *ptr_tmp;
451
452 if (maximum_bins_short == 120)
453 ptr_tmp = spec + (win * maximum_bins_short) + start;
454 else
455 ptr_tmp = spec + (win >> 7) + start;
456
457 scale_spec = -scale_spec;
458 scale_spec = ixheaac_min32(scale_spec, 31);
459
460 for (i = size; i != 0; i--) {
461 *ptr_tmp = (*ptr_tmp >> scale_spec);
462 ptr_tmp++;
463 }
464
465 if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
466 num_ch > 2) {
467 if (ar_flag) {
468 if (maximum_bins_short == 120) {
469 (*ixheaacd_tns_ar_filter_fixed)(
470 &spec[(win * maximum_bins_short) + position], size, filter->direction,
471 (WORD32 *)lpc_coef, filter->order, scale_lpc, 0);
472 } else {
473 (*ixheaacd_tns_ar_filter_fixed)(
474 &spec[(win << 7) + position], size, filter->direction,
475 (WORD32 *)lpc_coef, filter->order, scale_lpc, 0);
476 }
477 } else {
478 if (maximum_bins_short == 120) {
479 ixheaacd_tns_ma_filter_fixed_ld(&spec[(win * maximum_bins_short) + position],
480 size, filter->direction, lpc_coef,
481 filter->order, scale_lpc);
482 } else {
483 ixheaacd_tns_ma_filter_fixed_ld(&spec[(win << 7) + position], size,
484 filter->direction, lpc_coef,
485 filter->order, scale_lpc);
486 }
487 }
488 } else {
489 if (object_type == AOT_ER_AAC_ELD) {
490 scale_lpc = scale_lpc - 1;
491 }
492
493 if (maximum_bins_short == 120) {
494 (*ixheaacd_tns_ar_filter)(&spec[(win * maximum_bins_short) + position], size,
495 filter->direction, lpc_coef_16,
496 filter->order, scale_lpc, 0, scratch_buf);
497 } else {
498 (*ixheaacd_tns_ar_filter)(&spec[(win << 7) + position], size,
499 filter->direction, lpc_coef_16,
500 filter->order, scale_lpc, 0, scratch_buf);
501 }
502 }
503
504 if (maximum_bins_short == 120)
505 ptr_tmp = spec + (win * maximum_bins_short) + start;
506 else
507 ptr_tmp = spec + (win << 7) + start;
508
509 for (i = size; i != 0; i--) {
510 *ptr_tmp = (*ptr_tmp << scale_spec);
511 ptr_tmp++;
512 }
513 }
514 }
515 }
516 }