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 "ixheaacd_sbr_common.h"
21 #include <ixheaacd_type_def.h>
22 #include "string.h"
23 #include "ixheaacd_constants.h"
24 #include <ixheaacd_basic_ops32.h>
25 #include <ixheaacd_basic_ops16.h>
26 #include <ixheaacd_basic_ops40.h>
27 #include "ixheaacd_basic_ops.h"
28
29 #include "ixheaacd_bitbuffer.h"
30
31 #include "ixheaacd_error_codes.h"
32 #include "ixheaacd_defines.h"
33 #include <ixheaacd_aac_rom.h>
34 #include "ixheaacd_common_rom.h"
35 #include "ixheaacd_basic_funcs.h"
36 #include "ixheaacd_aac_imdct.h"
37 #include <ixheaacd_basic_op.h>
38 #include "ixheaacd_intrinsics.h"
39
40 #include "ixheaacd_pulsedata.h"
41
42 #include "ixheaacd_pns.h"
43 #include "ixheaacd_drc_data_struct.h"
44
45 #include "ixheaacd_lt_predict.h"
46 #include "ixheaacd_channelinfo.h"
47 #include "ixheaacd_cnst.h"
48 #include "ixheaacd_drc_dec.h"
49 #include "ixheaacd_sbrdecoder.h"
50 #include "ixheaacd_block.h"
51
52 #include "ixheaacd_channel.h"
53
54 #include "ixheaacd_audioobjtypes.h"
55 #include "ixheaacd_latmdemux.h"
56 #include "ixheaacd_aacdec.h"
57 #include "ixheaacd_tns.h"
58 #include "ixheaacd_function_selector.h"
59
60 #include <string.h>
61 #include <stdio.h>
62 #include <stdlib.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 WORD32 *ptr_scale_mant_tab =
119 ptr_aac_tables->pstr_block_tables->scale_mant_tab;
120
121 if (ptr_pns_info->pns_active) {
122 const WORD16 *swb_offset =
123 ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence]
124 .sfb_index;
125
126 WORD num_win_group, grp_len, sfb;
127 WORD32 *spec = &ptr_aac_dec_channel_info[channel]->ptr_spec_coeff[0];
128
129 for (num_win_group = 0; num_win_group < ptr_ics_info->num_window_groups;
130 num_win_group++) {
131 grp_len = ptr_ics_info->window_group_length[num_win_group];
132
133 for (grp_len = 0;
134 grp_len < ptr_ics_info->window_group_length[num_win_group];
135 grp_len++) {
136 for (sfb = 0; sfb < ptr_ics_info->max_sfb; sfb++) {
137 WORD16 pns_band = ((num_win_group << 4) + sfb);
138
139 if (ptr_aac_dec_channel_info[channel]
140 ->str_pns_info.pns_used[pns_band]) {
141 WORD32 scale_mant;
142 WORD32 scale_exp;
143 WORD32 sfb_width = swb_offset[sfb + 1] - swb_offset[sfb] - 1;
144 WORD32 *ptr_spec = &spec[swb_offset[sfb]];
145
146 scale_mant = ptr_scale_mant_tab[ptr_aac_dec_channel_info[channel]
147 ->ptr_scale_factor[pns_band] &
148 PNS_SCALE_MANT_TAB_MASK];
149 scale_exp = add_d(sub_d(31, (ptr_aac_dec_channel_info[channel]
150 ->ptr_scale_factor[pns_band] >>
151 PNS_SCALEFACTOR_SCALING)),
152 PNS_SCALE_MANT_TAB_SCALING);
153
154 if (ixheaacd_is_correlation(ptr_aac_dec_channel_info[LEFT],
155 pns_band)) {
156 if (channel == 0) {
157 ptr_aac_dec_channel_info[LEFT]
158 ->pstr_pns_corr_info->random_vector[pns_band] =
159 ptr_aac_dec_channel_info[LEFT]
160 ->pstr_pns_rand_vec_data->current_seed;
161
162 ixheaacd_gen_rand_vec(
163 scale_mant, scale_exp, ptr_spec, sfb_width,
164 &(ptr_aac_dec_channel_info[LEFT]
165 ->pstr_pns_rand_vec_data->current_seed));
166 }
167
168 else {
169 ixheaacd_gen_rand_vec(
170 scale_mant, scale_exp, ptr_spec, sfb_width,
171 &(ptr_aac_dec_channel_info[LEFT]
172 ->pstr_pns_corr_info->random_vector[pns_band]));
173 }
174
175 }
176
177 else {
178 ixheaacd_gen_rand_vec(
179 scale_mant, scale_exp, ptr_spec, sfb_width,
180 &(ptr_aac_dec_channel_info[LEFT]
181 ->pstr_pns_rand_vec_data->current_seed));
182 }
183 }
184 }
185
186 spec += 128;
187 }
188 }
189 }
190
191 if (channel == 0) {
192 ptr_aac_dec_channel_info[0]->pstr_pns_rand_vec_data->pns_frame_number++;
193 }
194 }
195
ixheaacd_tns_decode_coef(const ia_filter_info_struct * filter,WORD16 * parcor_coef,ia_aac_dec_tables_struct * ptr_aac_tables)196 VOID ixheaacd_tns_decode_coef(const ia_filter_info_struct *filter,
197 WORD16 *parcor_coef,
198 ia_aac_dec_tables_struct *ptr_aac_tables) {
199 WORD order, resolution;
200 WORD16 *ptr_par_coef = parcor_coef;
201 WORD16 *tns_coeff_ptr;
202 WORD8 ixheaacd_drc_offset = 4;
203 WORD8 *ptr_coef = (WORD8 *)filter->coef;
204
205 resolution = filter->resolution;
206 tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff3_16;
207
208 if (resolution) {
209 tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff4_16;
210 ixheaacd_drc_offset = ixheaacd_drc_offset << 1;
211 }
212
213 for (order = 0; order < filter->order; order++) {
214 WORD8 temp = *ptr_coef++;
215 *ptr_par_coef++ = tns_coeff_ptr[temp + ixheaacd_drc_offset];
216 }
217 }
218
ixheaacd_tns_decode_coef_ld(const ia_filter_info_struct * filter,WORD32 * parcor_coef,ia_aac_dec_tables_struct * ptr_aac_tables)219 VOID ixheaacd_tns_decode_coef_ld(const ia_filter_info_struct *filter,
220 WORD32 *parcor_coef,
221 ia_aac_dec_tables_struct *ptr_aac_tables) {
222 WORD order, resolution;
223 WORD32 *ptr_par_coef = parcor_coef;
224 WORD32 *tns_coeff_ptr;
225 WORD8 offset = 4;
226 WORD8 *ptr_coef = (WORD8 *)filter->coef;
227
228 resolution = filter->resolution;
229 tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff3;
230
231 if (resolution) {
232 tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff4;
233 offset = offset << 1;
234 }
235
236 for (order = 0; order < filter->order; order++) {
237 WORD8 temp = *ptr_coef++;
238 *ptr_par_coef++ = tns_coeff_ptr[temp + offset];
239 }
240 }
241
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)242 VOID ixheaacd_aac_tns_process(
243 ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD32 num_ch,
244 ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 object_type,
245 WORD32 ar_flag, WORD32 *predicted_spectrum) {
246 WORD i;
247 WORD16 scale_lpc;
248
249 ia_tns_info_aac_struct *ptr_tns_info =
250 &ptr_aac_dec_channel_info->str_tns_info;
251 WORD32 *spec = ptr_aac_dec_channel_info->ptr_spec_coeff;
252 WORD32 *scratch_buf = ptr_aac_dec_channel_info->scratch_buf_ptr;
253
254 WORD win, filt, start, stop, size, scale_spec;
255 ia_ics_info_struct *ptr_ics_info = &ptr_aac_dec_channel_info->str_ics_info;
256 WORD num_window, tns_max_bands, win_seq;
257 WORD position;
258
259 WORD32 parcor_coef[MAX_ORDER + 1];
260 WORD16 parcor_coef_16[MAX_ORDER + 1];
261
262 WORD32 lpc_coef[MAX_ORDER + 1];
263 WORD16 lpc_coef_16[MAX_ORDER + 1];
264
265 const WORD16 *ptr_sfb_table;
266
267 win_seq = ptr_ics_info->window_sequence == 0
268 ? 0
269 : (ptr_ics_info->window_sequence % 2 == 0);
270
271 if (ar_flag)
272 spec = ptr_aac_dec_channel_info->ptr_spec_coeff;
273 else {
274 spec = predicted_spectrum;
275 }
276
277 if (object_type == AOT_ER_AAC_ELD || object_type == AOT_ER_AAC_LD ||
278 object_type == AOT_AAC_LTP) {
279 if (512 == ptr_ics_info->frame_length) {
280 tns_max_bands =
281 ptr_aac_tables->pstr_block_tables
282 ->tns_max_bands_tbl_ld[ptr_ics_info->sampling_rate_index];
283 win_seq = 1;
284 num_window = win_seq;
285 } else if (480 == ptr_ics_info->frame_length) {
286 tns_max_bands =
287 ptr_aac_tables->pstr_block_tables
288 ->tns_max_bands_tbl_480[ptr_ics_info->sampling_rate_index];
289 win_seq = 1;
290 num_window = win_seq;
291 } else {
292 tns_max_bands =
293 ptr_aac_tables->pstr_block_tables
294 ->tns_max_bands_tbl[ptr_ics_info->sampling_rate_index][win_seq];
295
296 num_window = win_seq ? 8 : 1;
297 }
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
306 ptr_sfb_table =
307 ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence].sfb_index;
308
309 for (win = 0; win < num_window; win++) {
310 WORD n_filt = ptr_tns_info->n_filt[win];
311
312 for (filt = 0; filt < n_filt; filt++) {
313 ia_filter_info_struct *filter = &ptr_tns_info->str_filter[win][filt];
314
315 if (filter->order <= 0) {
316 continue;
317 }
318
319 if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
320 (num_ch > 2)) {
321 ixheaacd_tns_decode_coefficients(filter, parcor_coef, ptr_aac_tables);
322
323 } else {
324 ixheaacd_tns_decode_coef(filter, parcor_coef_16, ptr_aac_tables);
325 }
326
327 start = ixheaacd_min32(ixheaacd_min32(filter->start_band, tns_max_bands),
328 ptr_ics_info->max_sfb);
329
330 start = ptr_sfb_table[start];
331
332 stop = ixheaacd_min32(ixheaacd_min32(filter->stop_band, tns_max_bands),
333 ptr_ics_info->max_sfb);
334
335 stop = ptr_sfb_table[stop];
336
337 size = (stop - start);
338
339 if (size <= 0) {
340 continue;
341 }
342 if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
343 (num_ch > 2)) {
344 ixheaacd_tns_parcor_to_lpc(parcor_coef, lpc_coef, &scale_lpc,
345 filter->order);
346
347 } else {
348 (*ixheaacd_tns_parcor_lpc_convert)(parcor_coef_16, lpc_coef_16,
349 &scale_lpc, filter->order);
350 }
351
352 {
353 WORD32 *ptr_tmp = spec + (win << 7) + start;
354 scale_spec = (*ixheaacd_calc_max_spectral_line)(ptr_tmp, size);
355 }
356
357 if (filter->direction == -1) {
358 position = stop - 1;
359 } else {
360 position = start;
361 }
362
363 if ((num_ch <= 2) &&
364 ((object_type != AOT_ER_AAC_LD) && (object_type != AOT_AAC_LTP)))
365 scale_spec = ((scale_spec - 4) - scale_lpc);
366 else {
367 if (scale_spec > 17)
368 scale_spec = ((scale_spec - 6) - scale_lpc);
369 else if (scale_spec > 11)
370 scale_spec = ((scale_spec - 5) - scale_lpc);
371 else
372 scale_spec = ((scale_spec - 4) - scale_lpc);
373 }
374
375 if (scale_spec > 0) {
376 scale_spec = ixheaacd_min32(scale_spec, 31);
377
378 if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
379 (num_ch > 2)) {
380 if (ar_flag)
381 (*ixheaacd_tns_ar_filter_fixed)(&spec[(win << 7) + position], size,
382 filter->direction,
383 (WORD32 *)lpc_coef, filter->order,
384 (WORD32)scale_lpc, scale_spec);
385 else
386 ixheaacd_tns_ma_filter_fixed_ld(&spec[(win << 7) + position], size,
387 filter->direction, lpc_coef,
388 filter->order, scale_lpc);
389
390 } else {
391 if (object_type == AOT_ER_AAC_ELD) scale_spec = scale_spec - 1;
392
393 (*ixheaacd_tns_ar_filter)(&spec[(win << 7) + position], size,
394 filter->direction, lpc_coef_16,
395 filter->order, (WORD32)scale_lpc,
396 scale_spec, scratch_buf);
397 }
398
399 }
400
401 else {
402 WORD32 *ptr_tmp = spec + (win << 7) + start;
403
404 scale_spec = -scale_spec;
405 scale_spec = ixheaacd_min32(scale_spec, 31);
406
407 for (i = size; i != 0; i--) {
408 *ptr_tmp = (*ptr_tmp >> scale_spec);
409 ptr_tmp++;
410 }
411
412 if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
413 num_ch > 2) {
414 if (ar_flag)
415 (*ixheaacd_tns_ar_filter_fixed)(
416 &spec[(win << 7) + position], size, filter->direction,
417 (WORD32 *)lpc_coef, filter->order, scale_lpc, 0);
418
419 else
420 ixheaacd_tns_ma_filter_fixed_ld(&spec[(win << 7) + position], size,
421 filter->direction, lpc_coef,
422 filter->order, scale_lpc);
423 } else {
424 if (object_type == AOT_ER_AAC_ELD) {
425 scale_lpc = scale_lpc - 1;
426 }
427 (*ixheaacd_tns_ar_filter)(&spec[(win << 7) + position], size,
428 filter->direction, lpc_coef_16,
429 filter->order, scale_lpc, 0, scratch_buf);
430 }
431
432 ptr_tmp = spec + (win << 7) + start;
433
434 for (i = size; i != 0; i--) {
435 *ptr_tmp = (*ptr_tmp << scale_spec);
436 ptr_tmp++;
437 }
438 }
439 }
440 }
441 }
442