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 <math.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 #include "ixheaacd_defines.h"
31
32 #include "ixheaacd_intrinsics.h"
33 #include "ixheaacd_sbr_const.h"
34 #include <ixheaacd_basic_op.h>
35 #include "ixheaacd_defines.h"
36 #include "ixheaacd_bitbuffer.h"
37 #include "ixheaacd_pns.h"
38
39 #include <ixheaacd_aac_rom.h>
40 #include "ixheaacd_pulsedata.h"
41
42 #include "ixheaacd_drc_data_struct.h"
43 #include "ixheaacd_lt_predict.h"
44 #include "ixheaacd_channelinfo.h"
45 #include "ixheaacd_drc_dec.h"
46
47 #include "ixheaacd_sbrdecoder.h"
48
49 #include "ixheaacd_sbrdecsettings.h"
50 #include "ixheaacd_sbr_scale.h"
51 #include "ixheaacd_lpp_tran.h"
52 #include "ixheaacd_env_extr_part.h"
53 #include <ixheaacd_sbr_rom.h>
54 #include "ixheaacd_hybrid.h"
55 #include "ixheaacd_ps_dec.h"
56 #include "ixheaacd_ps_bitdec.h"
57 #include "ixheaacd_env_extr.h"
58 #include "ixheaacd_common_rom.h"
59 #include "ixheaacd_freq_sca.h"
60
61 #include "ixheaacd_qmf_dec.h"
62
63 #include "ixheaacd_env_calc.h"
64
65 #include "ixheaacd_pvc_dec.h"
66 #include "ixheaacd_sbr_dec.h"
67 #include "ixheaacd_env_dec.h"
68 #include "ixheaacd_basic_funcs.h"
69 #include "ixheaacd_sbr_crc.h"
70 #include "ixheaacd_function_selector.h"
71
72 #include "ixheaacd_audioobjtypes.h"
73
74 #define ALIGN_SIZE64(x) ((((x) + 7) >> 3) << 3)
75
76 static FLOAT32 ixheaacd_new_bw_table[4][4] = {{0.00f, 0.60f, 0.90f, 0.98f},
77 {0.60f, 0.75f, 0.90f, 0.98f},
78 {0.00f, 0.75f, 0.90f, 0.98f},
79 {0.00f, 0.75f, 0.90f, 0.98f}};
80 static WORD32 ixheaacd_inew_bw_table[4][4] = {
81 {0x00000000, 0x4ccccccd, 0x73333333, 0x7d70a3d7},
82 {0x4ccccccd, 0x60000000, 0x73333333, 0x7d70a3d7},
83 {0x00000000, 0x60000000, 0x73333333, 0x7d70a3d7},
84 {0x00000000, 0x60000000, 0x73333333, 0x7d70a3d7}};
85
ixheaacd_reset_sbrenvelope_calc(ia_sbr_calc_env_struct * h_cal_env)86 VOID ixheaacd_reset_sbrenvelope_calc(ia_sbr_calc_env_struct *h_cal_env) {
87 h_cal_env->ph_index = 0;
88 h_cal_env->filt_buf_noise_e = 0;
89 h_cal_env->start_up = 1;
90 }
91
ixheaacd_derive_lim_band_tbl(ia_sbr_header_data_struct * ptr_header_data,const ia_patch_param_struct * p_str_patch_param,WORD16 num_patches,ixheaacd_misc_tables * pstr_common_tables)92 WORD32 ixheaacd_derive_lim_band_tbl(
93 ia_sbr_header_data_struct *ptr_header_data,
94 const ia_patch_param_struct *p_str_patch_param, WORD16 num_patches,
95 ixheaacd_misc_tables *pstr_common_tables) {
96 WORD32 i, k, k_1;
97 WORD32 nr_lim, patch_border_k, patch_border_k_1, temp_nr_lim;
98
99 WORD16 lim_table[MAX_FREQ_COEFFS / 2 + MAX_NUM_PATCHES + 1];
100 WORD16 patch_borders[MAX_NUM_PATCHES + 1];
101 WORD16 kx, k2;
102 WORD16 temp, lim_bands, num_octaves;
103
104 WORD16 *f_lim_tbl = ptr_header_data->pstr_freq_band_data->freq_band_tbl_lim;
105 WORD16 *num_lf_bands = &ptr_header_data->pstr_freq_band_data->num_lf_bands;
106 WORD16 *f_low_tbl =
107 ptr_header_data->pstr_freq_band_data->freq_band_table[LOW];
108 WORD16 num_low_bnd = ptr_header_data->pstr_freq_band_data->num_sf_bands[LOW];
109 WORD16 limiter_bands = ptr_header_data->limiter_bands;
110
111 WORD16 sub_band_start = f_low_tbl[0];
112 WORD16 sub_band_end = f_low_tbl[num_low_bnd];
113 WORD16 limbnd_per_oct[4] = {(WORD16)0x2000, (WORD16)0x2666, (WORD16)0x4000,
114 (WORD16)0x6000};
115
116 if (limiter_bands == 0) {
117 f_lim_tbl[0] = 0;
118 f_lim_tbl[1] = sub_band_end - sub_band_start;
119 nr_lim = 1;
120 } else {
121 for (k = 0; k < num_patches; k++) {
122 patch_borders[k] = p_str_patch_param[k].guard_start_band - sub_band_start;
123 }
124 patch_borders[k] = sub_band_end - sub_band_start;
125
126 for (k = 0; k <= num_low_bnd; k++) {
127 lim_table[k] = f_low_tbl[k] - sub_band_start;
128 }
129 for (k = 1; k < num_patches; k++) {
130 lim_table[num_low_bnd + k] = patch_borders[k];
131 }
132
133 temp_nr_lim = nr_lim = (num_low_bnd + num_patches) - 1;
134 ixheaacd_aac_shellsort(lim_table, (temp_nr_lim + 1));
135
136 k = 1;
137 k_1 = 0;
138
139 lim_bands = limbnd_per_oct[limiter_bands];
140
141 while ((k - temp_nr_lim) <= 0) {
142 k2 = lim_table[k] + sub_band_start;
143 kx = lim_table[k_1] + sub_band_start;
144
145 num_octaves = pstr_common_tables->log_dual_is_table[k2];
146 num_octaves -= pstr_common_tables->log_dual_is_table[kx];
147
148 temp = (WORD16)(((WORD32)lim_bands * (WORD32)num_octaves) >> 15);
149
150 if (temp < 0x01f6) {
151 if (lim_table[k_1] == lim_table[k]) {
152 lim_table[k] = sub_band_end;
153 nr_lim = nr_lim - 1;
154 k = (k + 1);
155 continue;
156 }
157 patch_border_k_1 = patch_border_k = 0;
158
159 for (i = 0; i <= num_patches; i++) {
160 if (lim_table[k] == patch_borders[i]) {
161 patch_border_k = 1;
162 }
163 if (lim_table[k_1] == patch_borders[i]) {
164 patch_border_k_1 = 1;
165 }
166 }
167 if (!patch_border_k) {
168 lim_table[k] = sub_band_end;
169 nr_lim = nr_lim - 1;
170 k = (k + 1);
171 continue;
172 }
173
174 if (!patch_border_k_1) {
175 lim_table[k_1] = sub_band_end;
176 nr_lim = nr_lim - 1;
177 }
178 }
179 k_1 = k;
180 k = (k + 1);
181 }
182 ixheaacd_aac_shellsort(lim_table, (temp_nr_lim + 1));
183
184 memcpy(f_lim_tbl, lim_table, sizeof(WORD16) * (nr_lim + 1));
185 }
186 *num_lf_bands = nr_lim;
187
188 return 0;
189 }
190
ixheaacd_lean_sbrconcealment(ia_sbr_header_data_struct * ptr_header_data,ia_sbr_frame_info_data_struct * ptr_sbr_data,ia_sbr_prev_frame_data_struct * ptr_prev_data)191 VOID ixheaacd_lean_sbrconcealment(
192 ia_sbr_header_data_struct *ptr_header_data,
193 ia_sbr_frame_info_data_struct *ptr_sbr_data,
194 ia_sbr_prev_frame_data_struct *ptr_prev_data) {
195 WORD32 target;
196 WORD32 step;
197 WORD32 i;
198
199 WORD16 cur_start_pos;
200 WORD16 cur_stop_pos;
201
202 ptr_sbr_data->amp_res = ptr_prev_data->amp_res;
203 ptr_sbr_data->coupling_mode = ptr_prev_data->coupling_mode;
204 ptr_sbr_data->max_qmf_subband_aac = ptr_prev_data->max_qmf_subband_aac;
205
206 memcpy(ptr_sbr_data->sbr_invf_mode, ptr_prev_data->sbr_invf_mode,
207 sizeof(WORD32) * MAX_INVF_BANDS);
208
209 ptr_sbr_data->str_frame_info_details.num_env = 1;
210
211 cur_start_pos = ptr_prev_data->end_position - ptr_header_data->num_time_slots;
212 cur_stop_pos = ptr_header_data->num_time_slots;
213
214 ptr_sbr_data->str_frame_info_details.border_vec[0] = cur_start_pos;
215 ptr_sbr_data->str_frame_info_details.border_vec[1] = cur_stop_pos;
216
217 ptr_sbr_data->str_frame_info_details.noise_border_vec[0] = cur_start_pos;
218 ptr_sbr_data->str_frame_info_details.noise_border_vec[1] = cur_stop_pos;
219 ;
220
221 ptr_sbr_data->str_frame_info_details.freq_res[0] = 1;
222 ptr_sbr_data->str_frame_info_details.transient_env = -1;
223 ptr_sbr_data->str_frame_info_details.num_noise_env = 1;
224
225 ptr_sbr_data->num_env_sfac =
226 ptr_header_data->pstr_freq_band_data->num_sf_bands[1];
227
228 ptr_sbr_data->del_cod_dir_arr[0] = DTDF_DIR_TIME;
229
230 if (ptr_sbr_data->coupling_mode == COUPLING_BAL) {
231 target = SBR_ENERGY_PAN_OFFSET;
232 } else {
233 target = 0;
234 }
235
236 step = 1;
237
238 if (ptr_sbr_data->amp_res - SBR_AMPLITUDE_RESOLUTION_1_5 == 0) {
239 target = (target << 1);
240 step = (step << 1);
241 }
242
243 for (i = 0; i < ptr_sbr_data->num_env_sfac; i++) {
244 if (ptr_prev_data->sfb_nrg_prev[i] > target)
245 ptr_sbr_data->int_env_sf_arr[i] = -(step);
246 else
247 ptr_sbr_data->int_env_sf_arr[i] = step;
248 }
249
250 ptr_sbr_data->del_cod_dir_noise_arr[0] = DTDF_DIR_TIME;
251
252 memset(ptr_sbr_data->int_noise_floor, 0,
253 sizeof(WORD16) * ptr_header_data->pstr_freq_band_data->num_nf_bands);
254
255 memset(ptr_sbr_data->add_harmonics, 0, sizeof(FLAG) * MAX_FREQ_COEFFS);
256 }
257
ixheaacd_find_closest_entry(WORD32 goal_sb,WORD16 * f_master_tbl,WORD16 num_mf_bands,WORD16 direction)258 static WORD16 ixheaacd_find_closest_entry(WORD32 goal_sb, WORD16 *f_master_tbl,
259 WORD16 num_mf_bands,
260 WORD16 direction) {
261 WORD32 index;
262
263 if (goal_sb <= f_master_tbl[0]) return f_master_tbl[0];
264
265 if (goal_sb >= f_master_tbl[num_mf_bands]) return f_master_tbl[num_mf_bands];
266
267 if (direction) {
268 index = 0;
269 while (f_master_tbl[index] < goal_sb) {
270 index++;
271 }
272 } else {
273 index = num_mf_bands;
274 while (f_master_tbl[index] > goal_sb) {
275 index--;
276 }
277 }
278
279 return f_master_tbl[index];
280 }
281
ixheaacd_reset_hf_generator(ia_sbr_hf_generator_struct * ptr_hf_gen_str,ia_sbr_header_data_struct * ptr_header_data,WORD audio_object_type)282 WORD32 ixheaacd_reset_hf_generator(ia_sbr_hf_generator_struct *ptr_hf_gen_str,
283 ia_sbr_header_data_struct *ptr_header_data,
284 WORD audio_object_type) {
285 WORD32 patch, sb;
286 WORD32 temp;
287 WORD16 *ptr_noise_freq_tbl;
288 WORD32 num_nf_bands;
289
290 ia_transposer_settings_struct *pstr_transposer_settings =
291 ptr_hf_gen_str->pstr_settings;
292 ia_patch_param_struct *p_str_patch_param =
293 pstr_transposer_settings->str_patch_param;
294
295 WORD32 sub_band_start = ptr_header_data->pstr_freq_band_data->sub_band_start;
296 WORD16 *f_master_tbl = ptr_header_data->pstr_freq_band_data->f_master_tbl;
297 WORD16 num_mf_bands = ptr_header_data->pstr_freq_band_data->num_mf_bands;
298 WORD16 usb = ptr_header_data->pstr_freq_band_data->sub_band_end;
299
300 WORD32 src_start_band;
301 WORD32 patch_stride;
302 WORD32 num_bands_in_patch;
303
304 WORD32 lsb = f_master_tbl[0];
305 WORD16 xover_offset = sub_band_start - lsb;
306
307 WORD16 goal_sb;
308 WORD32 fs = ptr_header_data->out_sampling_freq;
309
310 if (lsb < (SHIFT_START_SB + 4)) {
311 return (1);
312 }
313 switch (fs) {
314 case 16000:
315 case 22050:
316 case 24000:
317 case 32000:
318 goal_sb = 64;
319 break;
320 case 44100:
321 goal_sb = 46;
322 break;
323 case 48000:
324 goal_sb = 43;
325 break;
326 case 64000:
327 goal_sb = 32;
328 break;
329 case 88200:
330 goal_sb = 23;
331 break;
332 case 96000:
333 goal_sb = 21;
334 break;
335 default:
336 return (0);
337 }
338
339 goal_sb = ixheaacd_find_closest_entry(goal_sb, f_master_tbl, num_mf_bands, 1);
340 if (audio_object_type != AOT_ER_AAC_ELD &&
341 audio_object_type != AOT_ER_AAC_LD) {
342 if (ixheaacd_abs16_sat((WORD16)(goal_sb - usb)) < 4) {
343 goal_sb = usb;
344 }
345 }
346
347 src_start_band = SHIFT_START_SB + xover_offset;
348 sb = (lsb + xover_offset);
349
350 patch = 0;
351
352 while (((sb - usb) < 0) && (patch < MAX_NUM_PATCHES)) {
353 ia_patch_param_struct *ptr_loc_patch_param = &p_str_patch_param[patch];
354
355 ptr_loc_patch_param->guard_start_band = sb;
356 sb = (sb + GUARDBANDS);
357 ptr_loc_patch_param->dst_start_band = sb;
358
359 num_bands_in_patch = (goal_sb - sb);
360
361 if ((num_bands_in_patch - (lsb - src_start_band)) >= 0) {
362 patch_stride = sb - src_start_band;
363 patch_stride = (WORD16)(patch_stride & ~1);
364 num_bands_in_patch = (lsb - (sb - patch_stride));
365 num_bands_in_patch = ixheaacd_find_closest_entry(
366 sb + num_bands_in_patch, f_master_tbl, num_mf_bands, 0);
367 num_bands_in_patch -= sb;
368 }
369
370 patch_stride = ((num_bands_in_patch + sb) - lsb);
371 patch_stride = (WORD16)((patch_stride + 1) & ~1);
372
373 if (num_bands_in_patch > 0) {
374 ptr_loc_patch_param->src_start_band = (sb - patch_stride);
375 ptr_loc_patch_param->dst_end_band = patch_stride;
376 ptr_loc_patch_param->num_bands_in_patch = num_bands_in_patch;
377 ptr_loc_patch_param->src_end_band =
378 (ptr_loc_patch_param->src_start_band + num_bands_in_patch);
379
380 sb = (sb + ptr_loc_patch_param->num_bands_in_patch);
381 patch++;
382 }
383
384 src_start_band = SHIFT_START_SB;
385
386 if ((ixheaacd_abs16_sat((WORD16)((sb - goal_sb))) - 3) < 0) {
387 goal_sb = usb;
388 }
389 }
390
391 patch--;
392
393 if ((patch > 0) && (p_str_patch_param[patch].num_bands_in_patch < 3)) {
394 patch--;
395 sb = p_str_patch_param[patch].dst_start_band +
396 p_str_patch_param[patch].num_bands_in_patch;
397 }
398
399 if (patch >= MAX_NUM_PATCHES) {
400 return -1;
401 }
402
403 pstr_transposer_settings->num_patches = patch + 1;
404
405 temp = 0;
406
407 for (patch = 0; patch < pstr_transposer_settings->num_patches; patch++) {
408 sb = ixheaacd_min32(sb, p_str_patch_param[patch].src_start_band);
409 temp = ixheaacd_max32(temp, p_str_patch_param[patch].src_end_band);
410 }
411
412 pstr_transposer_settings->start_patch = sb;
413 pstr_transposer_settings->stop_patch = temp;
414
415 ptr_noise_freq_tbl =
416 ptr_header_data->pstr_freq_band_data->freq_band_tbl_noise;
417 num_nf_bands = ptr_header_data->pstr_freq_band_data->num_nf_bands;
418
419 memcpy(&pstr_transposer_settings->bw_borders[0], &ptr_noise_freq_tbl[1],
420 sizeof(WORD16) * num_nf_bands);
421
422 memset(ptr_hf_gen_str->bw_array_prev, 0, sizeof(WORD32) * MAX_NUM_PATCHES);
423
424 return 0;
425 }
ixheaacd_rescale_x_overlap(ia_sbr_dec_struct * ptr_sbr_dec,ia_sbr_header_data_struct * ptr_header_data,ia_sbr_frame_info_data_struct * ptr_frame_data,ia_sbr_prev_frame_data_struct * ptr_frame_data_prev,WORD32 ** pp_overlap_buffer_real,FLAG low_pow_flag)426 VOID ixheaacd_rescale_x_overlap(
427 ia_sbr_dec_struct *ptr_sbr_dec, ia_sbr_header_data_struct *ptr_header_data,
428 ia_sbr_frame_info_data_struct *ptr_frame_data,
429 ia_sbr_prev_frame_data_struct *ptr_frame_data_prev,
430 WORD32 **pp_overlap_buffer_real, FLAG low_pow_flag) {
431 WORD32 k, l;
432 WORD32 start_band, end_band;
433 WORD32 target_lsb, target_usb;
434 WORD32 source_scale, target_scale, delta_scale, reserve;
435 WORD32 **pp_overlap_buffer_imag = &pp_overlap_buffer_real[MAX_ENV_COLS];
436
437 WORD32 old_lsb = ptr_frame_data_prev->max_qmf_subband_aac;
438 WORD32 start_slot =
439 (ptr_header_data->time_step *
440 (ptr_frame_data_prev->end_position - ptr_header_data->num_time_slots));
441 WORD32 new_lsb = ptr_frame_data->max_qmf_subband_aac;
442
443 ptr_sbr_dec->str_codec_qmf_bank.usb = new_lsb;
444 ptr_sbr_dec->str_synthesis_qmf_bank.lsb = new_lsb;
445
446 start_band = ixheaacd_min32(old_lsb, new_lsb);
447 end_band = ixheaacd_max32(old_lsb, new_lsb);
448
449 if (new_lsb != old_lsb && old_lsb > 0) {
450 for (l = start_slot; l < 6; l++) {
451 for (k = old_lsb; k < new_lsb; k++) {
452 pp_overlap_buffer_real[l][k] = 0L;
453
454 if (!low_pow_flag) {
455 pp_overlap_buffer_imag[l][k] = 0L;
456 }
457 }
458 }
459
460 if (new_lsb > old_lsb) {
461 source_scale = ptr_sbr_dec->str_sbr_scale_fact.ov_hb_scale;
462 target_scale = ptr_sbr_dec->str_sbr_scale_fact.ov_lb_scale;
463 target_lsb = 0;
464 target_usb = old_lsb;
465 } else {
466 source_scale = ptr_sbr_dec->str_sbr_scale_fact.ov_lb_scale;
467 target_scale = ptr_sbr_dec->str_sbr_scale_fact.ov_hb_scale;
468 target_lsb = old_lsb;
469 target_usb = ptr_sbr_dec->str_synthesis_qmf_bank.usb;
470 }
471
472 reserve = (*ixheaacd_ixheaacd_expsubbandsamples)(
473 pp_overlap_buffer_real, pp_overlap_buffer_imag, start_band, end_band, 0,
474 start_slot, low_pow_flag);
475
476 (*ixheaacd_adjust_scale)(pp_overlap_buffer_real, pp_overlap_buffer_imag,
477 start_band, end_band, 0, start_slot, reserve,
478 low_pow_flag);
479
480 source_scale += reserve;
481
482 delta_scale = (target_scale - source_scale);
483
484 if (delta_scale > 0) {
485 delta_scale = -(delta_scale);
486 start_band = target_lsb;
487 end_band = target_usb;
488
489 if (new_lsb > old_lsb) {
490 ptr_sbr_dec->str_sbr_scale_fact.ov_lb_scale = source_scale;
491 } else {
492 ptr_sbr_dec->str_sbr_scale_fact.ov_hb_scale = source_scale;
493 }
494 }
495
496 (*ixheaacd_adjust_scale)(pp_overlap_buffer_real, pp_overlap_buffer_imag,
497 start_band, end_band, 0, start_slot, delta_scale,
498 low_pow_flag);
499 }
500 }
501
ixheaacd_map_sineflags(WORD16 * freq_band_table,WORD16 num_sf_bands,FLAG * add_harmonics,WORD8 * harm_flags_prev,WORD16 transient_env,WORD8 * sine_mapped)502 VOID ixheaacd_map_sineflags(WORD16 *freq_band_table, WORD16 num_sf_bands,
503 FLAG *add_harmonics, WORD8 *harm_flags_prev,
504 WORD16 transient_env, WORD8 *sine_mapped)
505
506 {
507 WORD32 qmfband2, li, ui, i;
508 WORD32 low_subband_sec;
509 WORD32 oldflags;
510
511 low_subband_sec = (freq_band_table[0] << 1);
512
513 memset(sine_mapped, MAX_ENVELOPES, sizeof(WORD8) * MAX_FREQ_COEFFS);
514
515 for (i = (num_sf_bands - 1); i >= 0; i--) {
516 oldflags = *harm_flags_prev;
517 *harm_flags_prev++ = add_harmonics[i];
518
519 if (add_harmonics[i]) {
520 li = freq_band_table[i];
521
522 ui = freq_band_table[i + 1];
523
524 qmfband2 = ((ui + li) - low_subband_sec) >> 1;
525
526 if (oldflags)
527 sine_mapped[qmfband2] = 0;
528 else
529 sine_mapped[qmfband2] = (WORD8)transient_env;
530 }
531 }
532 }
533
ixheaacd_map_34_params_to_20(WORD16 * params)534 VOID ixheaacd_map_34_params_to_20(WORD16 *params) {
535 params[0] = ixheaacd_divideby3(params[0] + params[0] + params[1]);
536 params[1] = ixheaacd_divideby3(params[1] + params[2] + params[2]);
537 params[2] = ixheaacd_divideby3(params[3] + params[3] + params[4]);
538 params[3] = ixheaacd_divideby3(params[4] + params[5] + params[5]);
539 params[4] = ixheaacd_divideby2(params[6] + params[7]);
540 params[5] = ixheaacd_divideby2(params[8] + params[9]);
541 params[6] = params[10];
542 params[7] = params[11];
543 params[8] = ixheaacd_divideby2(params[12] + params[13]);
544 params[9] = ixheaacd_divideby2(params[14] + params[15]);
545 params[10] = params[16];
546 params[11] = params[17];
547 params[12] = params[18];
548 params[13] = params[19];
549 params[14] = ixheaacd_divideby2(params[20] + params[21]);
550 params[15] = ixheaacd_divideby2(params[22] + params[23]);
551 params[16] = ixheaacd_divideby2(params[24] + params[25]);
552 params[17] = ixheaacd_divideby2(params[26] + params[27]);
553 params[18] = ixheaacd_divideby2(
554 ixheaacd_divideby2(params[28] + params[29] + params[30] + params[31]));
555 params[19] = ixheaacd_divideby2(params[32] + params[33]);
556 }
557
558 extern const WORD16 ixheaacd_num_bands[3];
559
ixheaacd_read_ps_data(ia_ps_dec_struct * ptr_ps_dec,ia_bit_buf_struct * it_bit_buff,WORD16 num_bits_left,ia_ps_tables_struct * ps_tables_ptr)560 WORD16 ixheaacd_read_ps_data(ia_ps_dec_struct *ptr_ps_dec,
561 ia_bit_buf_struct *it_bit_buff,
562 WORD16 num_bits_left,
563 ia_ps_tables_struct *ps_tables_ptr) {
564 WORD b, e, temp;
565 const WORD16 num_env_tab[4] = {0, 1, 2, 4};
566 WORD cnt_bits;
567 ia_huffman_data_type huffman_table, huffman_df_table, huffman_dt_table;
568 FLAG enable_ps_header;
569
570 if (!ptr_ps_dec) {
571 return 0;
572 }
573
574 cnt_bits = it_bit_buff->cnt_bits;
575
576 enable_ps_header = ixheaacd_read_bits_buf(it_bit_buff, 1);
577
578 if (enable_ps_header) {
579 ptr_ps_dec->enable_iid = ixheaacd_read_bits_buf(it_bit_buff, 1);
580 if (ptr_ps_dec->enable_iid) {
581 ptr_ps_dec->iid_mode = ixheaacd_read_bits_buf(it_bit_buff, 3);
582 }
583
584 if (ptr_ps_dec->iid_mode > 2) {
585 ptr_ps_dec->iid_quant = 1;
586 ptr_ps_dec->iid_mode -= 3;
587 } else {
588 ptr_ps_dec->iid_quant = 0;
589 }
590
591 ptr_ps_dec->enable_icc = ixheaacd_read_bits_buf(it_bit_buff, 1);
592 if (ptr_ps_dec->enable_icc) {
593 ptr_ps_dec->icc_mode = ixheaacd_read_bits_buf(it_bit_buff, 3);
594 }
595
596 ptr_ps_dec->enable_ext = ixheaacd_read_bits_buf(it_bit_buff, 1);
597
598 if (ptr_ps_dec->icc_mode > 2) {
599 ptr_ps_dec->icc_mode -= 3;
600 }
601 }
602
603 if ((ptr_ps_dec->enable_iid && ptr_ps_dec->iid_mode > 2) ||
604 (ptr_ps_dec->enable_icc && ptr_ps_dec->icc_mode > 2)) {
605 ptr_ps_dec->ps_data_present = 0;
606
607 num_bits_left -= (cnt_bits - it_bit_buff->cnt_bits);
608
609 while (num_bits_left > 8) {
610 ixheaacd_read_bits_buf(it_bit_buff, 8);
611 num_bits_left -= 8;
612 }
613 ixheaacd_read_bits_buf(it_bit_buff, num_bits_left);
614
615 return (cnt_bits - it_bit_buff->cnt_bits);
616 }
617
618 ptr_ps_dec->frame_class = (FLAG)ixheaacd_read_bits_buf(it_bit_buff, 1);
619
620 temp = ixheaacd_read_bits_buf(it_bit_buff, 2);
621
622 if (ptr_ps_dec->frame_class == 0) {
623 ptr_ps_dec->num_env = num_env_tab[temp];
624 } else {
625 ptr_ps_dec->num_env = (((1 + temp) << 8) >> 8);
626
627 for (e = 1; e < ptr_ps_dec->num_env + 1; e++) {
628 ptr_ps_dec->border_position[e] =
629 (((ixheaacd_read_bits_buf(it_bit_buff, 5) + 1) << 8) >> 8);
630 }
631 }
632
633 if (ptr_ps_dec->enable_iid) {
634 if (ptr_ps_dec->iid_quant) {
635 huffman_df_table = (ia_huffman_data_type)&ps_tables_ptr->huff_iid_df_fine;
636 huffman_dt_table = (ia_huffman_data_type)&ps_tables_ptr->huff_iid_dt_fine;
637 } else {
638 huffman_df_table = (ia_huffman_data_type)&ps_tables_ptr->huff_iid_df;
639 huffman_dt_table = (ia_huffman_data_type)&ps_tables_ptr->huff_iid_dt;
640 }
641
642 for (e = 0; e < ptr_ps_dec->num_env; e++) {
643 ptr_ps_dec->iid_dt[e] = (FLAG)ixheaacd_read_bits_buf(it_bit_buff, 1);
644
645 if (ptr_ps_dec->iid_dt[e]) {
646 huffman_table = huffman_dt_table;
647 } else {
648 huffman_table = huffman_df_table;
649 }
650
651 for (b = 0; b < ixheaacd_num_bands[ptr_ps_dec->iid_mode]; b++) {
652 ptr_ps_dec->iid_par_table[e][b] =
653 ixheaacd_ssc_huff_dec(huffman_table, it_bit_buff);
654 }
655 }
656 }
657
658 if (ptr_ps_dec->enable_icc) {
659 huffman_df_table = (ia_huffman_data_type)&ps_tables_ptr->huff_icc_df;
660 huffman_dt_table = (ia_huffman_data_type)&ps_tables_ptr->huff_icc_dt;
661
662 for (e = 0; e < ptr_ps_dec->num_env; e++) {
663 ptr_ps_dec->icc_dt[e] = ixheaacd_read_bits_buf(it_bit_buff, 1);
664
665 if (ptr_ps_dec->icc_dt[e]) {
666 huffman_table = huffman_dt_table;
667 } else {
668 huffman_table = huffman_df_table;
669 }
670
671 for (b = 0; b < ixheaacd_num_bands[ptr_ps_dec->icc_mode]; b++) {
672 ptr_ps_dec->icc_par_table[e][b] =
673 ixheaacd_ssc_huff_dec(huffman_table, it_bit_buff);
674 }
675 }
676 }
677
678 if (ptr_ps_dec->enable_ext) {
679 WORD32 cnt = ixheaacd_read_bits_buf(it_bit_buff, 4);
680
681 if (cnt == 15) {
682 cnt += ixheaacd_read_bits_buf(it_bit_buff, 8);
683 }
684 while (cnt--) {
685 ixheaacd_read_bits_buf(it_bit_buff, 8);
686 }
687 }
688
689 ptr_ps_dec->ps_data_present = 1;
690
691 return (cnt_bits - it_bit_buff->cnt_bits);
692 }
693
ixheaacd_invfilt_level_emphasis(ia_sbr_hf_generator_struct * ptr_hf_gen_str,WORD32 num_if_bands,WORD32 * inv_filt_mode,WORD32 * inv_filt_mode_prev,WORD32 * bw_array)694 VOID ixheaacd_invfilt_level_emphasis(ia_sbr_hf_generator_struct *ptr_hf_gen_str,
695 WORD32 num_if_bands, WORD32 *inv_filt_mode,
696 WORD32 *inv_filt_mode_prev,
697 WORD32 *bw_array) {
698 WORD32 i;
699 WORD32 accu;
700 WORD16 w1, w2;
701
702 for (i = 0; i < num_if_bands; i++) {
703 bw_array[i] =
704 ixheaacd_inew_bw_table[inv_filt_mode_prev[i]][inv_filt_mode[i]];
705
706 if (bw_array[i] < ptr_hf_gen_str->bw_array_prev[i]) {
707 w1 = 0x6000;
708 w2 = 0x2000;
709 } else {
710 w1 = 0x7400;
711 w2 = 0x0c00;
712 }
713 accu = ixheaacd_add32(
714 ixheaacd_mult32x16in32_shl(bw_array[i], w1),
715 ixheaacd_mult32x16in32_shl(ptr_hf_gen_str->bw_array_prev[i], w2));
716
717 if (accu < 0x02000000) {
718 accu = 0;
719 }
720
721 if (accu >= 0x7f800000) {
722 accu = 0x7f800000;
723 }
724 bw_array[i] = accu;
725 }
726 }
727
728 typedef struct {
729 FLOAT32 phi_0_1_real;
730 FLOAT32 phi_0_1_imag;
731 FLOAT32 phi_0_2_real;
732 FLOAT32 phi_0_2_imag;
733 FLOAT32 phi_1_1;
734 FLOAT32 phi_1_2_real;
735 FLOAT32 phi_1_2_imag;
736 FLOAT32 phi_2_2;
737 FLOAT32 det;
738 } ia_auto_corr_ele_struct;
739
ixheaacd_esbr_calc_co_variance(ia_auto_corr_ele_struct * pstr_auto_corr,FLOAT32 vec_x_real[][64],FLOAT32 vec_x_imag[][64],WORD32 bd,WORD32 len)740 static VOID ixheaacd_esbr_calc_co_variance(
741 ia_auto_corr_ele_struct *pstr_auto_corr, FLOAT32 vec_x_real[][64],
742 FLOAT32 vec_x_imag[][64], WORD32 bd, WORD32 len) {
743 WORD32 j, jminus1, jminus2;
744
745 memset(pstr_auto_corr, 0, sizeof(ia_auto_corr_ele_struct));
746
747 for (j = 0; j < len; j++) {
748 jminus1 = j - 1;
749 jminus2 = jminus1 - 1;
750
751 pstr_auto_corr->phi_0_1_real +=
752 vec_x_real[j][bd] * vec_x_real[jminus1][bd] +
753 vec_x_imag[j][bd] * vec_x_imag[jminus1][bd];
754
755 pstr_auto_corr->phi_0_1_imag +=
756 vec_x_imag[j][bd] * vec_x_real[jminus1][bd] -
757 vec_x_real[j][bd] * vec_x_imag[jminus1][bd];
758
759 pstr_auto_corr->phi_0_2_real +=
760 vec_x_real[j][bd] * vec_x_real[jminus2][bd] +
761 vec_x_imag[j][bd] * vec_x_imag[jminus2][bd];
762
763 pstr_auto_corr->phi_0_2_imag +=
764 vec_x_imag[j][bd] * vec_x_real[jminus2][bd] -
765 vec_x_real[j][bd] * vec_x_imag[jminus2][bd];
766
767 pstr_auto_corr->phi_1_1 +=
768 vec_x_real[jminus1][bd] * vec_x_real[jminus1][bd] +
769 vec_x_imag[jminus1][bd] * vec_x_imag[jminus1][bd];
770
771 pstr_auto_corr->phi_1_2_real +=
772 vec_x_real[jminus1][bd] * vec_x_real[jminus2][bd] +
773 vec_x_imag[jminus1][bd] * vec_x_imag[jminus2][bd];
774
775 pstr_auto_corr->phi_1_2_imag +=
776 vec_x_imag[jminus1][bd] * vec_x_real[jminus2][bd] -
777 vec_x_real[jminus1][bd] * vec_x_imag[jminus2][bd];
778
779 pstr_auto_corr->phi_2_2 +=
780 vec_x_real[jminus2][bd] * vec_x_real[jminus2][bd] +
781 vec_x_imag[jminus2][bd] * vec_x_imag[jminus2][bd];
782 }
783
784 pstr_auto_corr->det =
785 pstr_auto_corr->phi_1_1 * pstr_auto_corr->phi_2_2 -
786 (pstr_auto_corr->phi_1_2_real * pstr_auto_corr->phi_1_2_real +
787 pstr_auto_corr->phi_1_2_imag * pstr_auto_corr->phi_1_2_imag) *
788 SBR_HF_RELAXATION_PARAM;
789 }
790
ixheaacd_esbr_chirp_fac_calc(WORD32 * inv_filt_mode,WORD32 * inv_filt_mode_prev,WORD32 num_if_bands,FLOAT32 * bw_array,FLOAT32 * bw_array_prev)791 static void ixheaacd_esbr_chirp_fac_calc(WORD32 *inv_filt_mode,
792 WORD32 *inv_filt_mode_prev,
793 WORD32 num_if_bands, FLOAT32 *bw_array,
794 FLOAT32 *bw_array_prev) {
795 WORD32 i;
796
797 for (i = 0; i < num_if_bands; i++) {
798 bw_array[i] =
799 ixheaacd_new_bw_table[inv_filt_mode_prev[i]][inv_filt_mode[i]];
800
801 if (bw_array[i] < bw_array_prev[i])
802 bw_array[i] = 0.75000f * bw_array[i] + 0.25000f * bw_array_prev[i];
803 else
804 bw_array[i] = 0.90625f * bw_array[i] + 0.09375f * bw_array_prev[i];
805
806 if (bw_array[i] < 0.015625) bw_array[i] = 0;
807 }
808 }
809
ixheaacd_gausssolve(WORD32 n,FLOAT32 a[][MAXDEG+1],FLOAT32 b[],FLOAT32 y[])810 static void ixheaacd_gausssolve(WORD32 n, FLOAT32 a[][MAXDEG + 1], FLOAT32 b[],
811 FLOAT32 y[]) {
812 WORD32 i, j, k, imax;
813 FLOAT32 v;
814
815 for (i = 0; i < n; i++) {
816 imax = i;
817 for (k = i + 1; k < n; k++) {
818 if (fabs(a[k][i]) > fabs(a[imax][i])) {
819 imax = k;
820 }
821 }
822 if (imax != i) {
823 v = b[imax];
824 b[imax] = b[i];
825 b[i] = v;
826 for (j = i; j < n; j++) {
827 v = a[imax][j];
828 a[imax][j] = a[i][j];
829 a[i][j] = v;
830 }
831 }
832
833 v = a[i][i];
834
835 b[i] /= v;
836 for (j = i; j < n; j++) {
837 a[i][j] /= v;
838 }
839
840 for (k = i + 1; k < n; k++) {
841 v = a[k][i];
842 b[k] -= v * b[i];
843 for (j = i + 1; j < n; j++) {
844 a[k][j] -= v * a[i][j];
845 }
846 }
847 }
848
849 for (i = n - 1; i >= 0; i--) {
850 y[i] = b[i];
851 for (j = i + 1; j < n; j++) {
852 y[i] -= a[i][j] * y[j];
853 }
854 }
855 }
856
ixheaacd_polyfit(WORD32 n,FLOAT32 y[],FLOAT32 p[])857 void ixheaacd_polyfit(WORD32 n, FLOAT32 y[], FLOAT32 p[]) {
858 WORD32 i, j, k;
859 FLOAT32 a[MAXDEG + 1][MAXDEG + 1];
860 FLOAT32 b[MAXDEG + 1];
861 FLOAT32 v[2 * MAXDEG + 1];
862
863 for (i = 0; i <= MAXDEG; i++) {
864 b[i] = 0.0f;
865 for (j = 0; j <= MAXDEG; j++) {
866 a[i][j] = 0.0f;
867 }
868 }
869
870 for (k = 0; k < n; k++) {
871 v[0] = 1.0;
872 for (i = 1; i <= 2 * MAXDEG; i++) {
873 v[i] = k * v[i - 1];
874 }
875
876 for (i = 0; i <= MAXDEG; i++) {
877 b[i] += v[MAXDEG - i] * y[k];
878 for (j = 0; j <= MAXDEG; j++) {
879 a[i][j] += v[2 * MAXDEG - i - j];
880 }
881 }
882 }
883
884 ixheaacd_gausssolve(MAXDEG + 1, a, b, p);
885 }
886
ixheaacd_pre_processing(FLOAT32 ptr_src_buf_real[][64],FLOAT32 ptr_src_buf_imag[][64],FLOAT32 gain_vector[],WORD32 num_bands,WORD32 start_sample,WORD32 end_sample)887 VOID ixheaacd_pre_processing(FLOAT32 ptr_src_buf_real[][64],
888 FLOAT32 ptr_src_buf_imag[][64],
889 FLOAT32 gain_vector[], WORD32 num_bands,
890 WORD32 start_sample, WORD32 end_sample) {
891 WORD32 k, i;
892 FLOAT32 poly_coeff[4];
893 FLOAT32 mean_enrg = 0;
894 FLOAT32 low_env_slope[64];
895 FLOAT32 low_env[64];
896 FLOAT32 a0;
897 FLOAT32 a1;
898 FLOAT32 a2;
899 FLOAT32 a3;
900
901 for (k = 0; k < num_bands; k++) {
902 FLOAT32 temp = 0;
903 for (i = start_sample; i < end_sample; i++) {
904 temp += ptr_src_buf_real[i][k] * ptr_src_buf_real[i][k] +
905 ptr_src_buf_imag[i][k] * ptr_src_buf_imag[i][k];
906 }
907 temp /= (end_sample - start_sample);
908 low_env[k] = (FLOAT32)(10 * log10(temp + 1));
909 mean_enrg = mean_enrg + low_env[k];
910 }
911 mean_enrg /= num_bands;
912
913 ixheaacd_polyfit(num_bands, low_env, poly_coeff);
914
915 a0 = poly_coeff[0];
916 a1 = poly_coeff[1];
917 a2 = poly_coeff[2];
918 a3 = poly_coeff[3];
919 for (k = 0; k < num_bands; k++) {
920 FLOAT32 x_low_l = (FLOAT32)k;
921 FLOAT32 low_env_slope_l = a3;
922 low_env_slope_l = low_env_slope_l + a2 * x_low_l;
923
924 x_low_l = x_low_l * x_low_l;
925 low_env_slope_l = low_env_slope_l + a1 * x_low_l;
926
927 x_low_l = x_low_l * (FLOAT32)k;
928 low_env_slope_l = low_env_slope_l + a0 * x_low_l;
929
930 low_env_slope[k] = low_env_slope_l;
931 }
932
933 for (i = 0; i < num_bands; i++) {
934 gain_vector[i] = (FLOAT32)pow(10, (mean_enrg - low_env_slope[i]) / 20.0f);
935 }
936 }
937
ixheaacd_generate_hf(FLOAT32 ptr_src_buf_real[][64],FLOAT32 ptr_src_buf_imag[][64],FLOAT32 ptr_ph_vocod_buf_real[][64],FLOAT32 ptr_ph_vocod_buf_imag[][64],FLOAT32 ptr_dst_buf_real[][64],FLOAT32 ptr_dst_buf_imag[][64],ia_sbr_frame_info_data_struct * ptr_frame_data,ia_sbr_header_data_struct * ptr_header_data)938 WORD32 ixheaacd_generate_hf(FLOAT32 ptr_src_buf_real[][64],
939 FLOAT32 ptr_src_buf_imag[][64],
940 FLOAT32 ptr_ph_vocod_buf_real[][64],
941 FLOAT32 ptr_ph_vocod_buf_imag[][64],
942 FLOAT32 ptr_dst_buf_real[][64],
943 FLOAT32 ptr_dst_buf_imag[][64],
944 ia_sbr_frame_info_data_struct *ptr_frame_data,
945 ia_sbr_header_data_struct *ptr_header_data) {
946 WORD32 bw_index, i, k, k2, patch = 0;
947 WORD32 co_var_len;
948 WORD32 start_sample, end_sample, goal_sb;
949 WORD32 sb, source_start_band, patch_stride, num_bands_in_patch;
950 WORD32 hbe_flag = ptr_header_data->hbe_flag;
951 FLOAT32 a0r, a0i, a1r, a1i;
952 FLOAT32 bw_array[MAX_NUM_PATCHES] = {0};
953
954 ia_auto_corr_ele_struct str_auto_corr;
955
956 WORD16 *ptr_invf_band_tbl =
957 &ptr_header_data->pstr_freq_band_data->freq_band_tbl_noise[1];
958 WORD32 num_if_bands = ptr_header_data->pstr_freq_band_data->num_nf_bands;
959 WORD32 sub_band_start = ptr_header_data->pstr_freq_band_data->sub_band_start;
960 WORD16 *f_master_tbl = ptr_header_data->pstr_freq_band_data->f_master_tbl;
961 WORD32 num_mf_bands = ptr_header_data->pstr_freq_band_data->num_mf_bands;
962 WORD32 *inv_filt_mode = ptr_frame_data->sbr_invf_mode;
963 WORD32 *inv_filt_mode_prev = ptr_frame_data->sbr_invf_mode_prev;
964 WORD32 sbr_patching_mode = ptr_frame_data->sbr_patching_mode;
965 ia_frame_info_struct *p_frame_info = &ptr_frame_data->str_frame_info_details;
966 WORD32 pre_proc_flag = ptr_header_data->pre_proc_flag;
967 WORD32 is_usf_4 = ptr_header_data->is_usf_4;
968 WORD32 fs = ptr_header_data->out_sampling_freq;
969
970 WORD32 lsb = f_master_tbl[0];
971 WORD32 usb = f_master_tbl[num_mf_bands];
972 WORD32 xover_offset = sub_band_start - f_master_tbl[0];
973
974 FLOAT32 bw = 0.0f;
975 FLOAT32 fac = 0.0f;
976
977 FLOAT32 gain;
978 FLOAT32 gain_vector[64];
979
980 WORD32 slope_length = 0;
981 WORD32 first_slot_offset = p_frame_info->border_vec[0];
982 WORD32 end_slot_offs = 0;
983
984 FLOAT32 *bw_array_prev = ptr_frame_data->bw_array_prev;
985
986 end_slot_offs = p_frame_info->border_vec[p_frame_info->num_env] - 16;
987 if (is_usf_4) {
988 start_sample = first_slot_offset * 4;
989 end_sample = 64 + end_slot_offs * 4;
990 co_var_len = 76;
991 } else {
992 start_sample = first_slot_offset * 2;
993 end_sample = 32 + end_slot_offs * 2;
994 co_var_len = 38;
995 }
996
997 if (pre_proc_flag) {
998 ixheaacd_pre_processing(ptr_src_buf_real, ptr_src_buf_imag, gain_vector,
999 f_master_tbl[0], start_sample, end_sample);
1000 }
1001
1002 ixheaacd_esbr_chirp_fac_calc(inv_filt_mode, inv_filt_mode_prev, num_if_bands,
1003 bw_array, bw_array_prev);
1004
1005 for (i = start_sample; i < end_sample; i++) {
1006 memset(ptr_dst_buf_real[i] + usb, 0, (64 - usb) * sizeof(FLOAT32));
1007 memset(ptr_dst_buf_imag[i] + usb, 0, (64 - usb) * sizeof(FLOAT32));
1008 }
1009
1010 if (sbr_patching_mode || !hbe_flag) {
1011 FLOAT32 alpha_real[64][2], alpha_imag[64][2];
1012
1013 for (k = 1; k < f_master_tbl[0]; k++) {
1014 ixheaacd_esbr_calc_co_variance(&str_auto_corr, &ptr_src_buf_real[0],
1015 &ptr_src_buf_imag[0], k, co_var_len);
1016 if (str_auto_corr.det == 0.0f) {
1017 alpha_real[k][1] = alpha_imag[k][1] = 0;
1018 } else {
1019 fac = 1.0f / str_auto_corr.det;
1020 alpha_real[k][1] =
1021 (str_auto_corr.phi_0_1_real * str_auto_corr.phi_1_2_real -
1022 str_auto_corr.phi_0_1_imag * str_auto_corr.phi_1_2_imag -
1023 str_auto_corr.phi_0_2_real * str_auto_corr.phi_1_1) *
1024 fac;
1025 alpha_imag[k][1] =
1026 (str_auto_corr.phi_0_1_imag * str_auto_corr.phi_1_2_real +
1027 str_auto_corr.phi_0_1_real * str_auto_corr.phi_1_2_imag -
1028 str_auto_corr.phi_0_2_imag * str_auto_corr.phi_1_1) *
1029 fac;
1030 }
1031
1032 if (str_auto_corr.phi_1_1 == 0) {
1033 alpha_real[k][0] = alpha_imag[k][0] = 0;
1034 } else {
1035 fac = 1.0f / str_auto_corr.phi_1_1;
1036 alpha_real[k][0] = -(str_auto_corr.phi_0_1_real +
1037 alpha_real[k][1] * str_auto_corr.phi_1_2_real +
1038 alpha_imag[k][1] * str_auto_corr.phi_1_2_imag) *
1039 fac;
1040 alpha_imag[k][0] = -(str_auto_corr.phi_0_1_imag +
1041 alpha_imag[k][1] * str_auto_corr.phi_1_2_real -
1042 alpha_real[k][1] * str_auto_corr.phi_1_2_imag) *
1043 fac;
1044 }
1045
1046 if ((alpha_real[k][0] * alpha_real[k][0] +
1047 alpha_imag[k][0] * alpha_imag[k][0] >=
1048 16.0f) ||
1049 (alpha_real[k][1] * alpha_real[k][1] +
1050 alpha_imag[k][1] * alpha_imag[k][1] >=
1051 16.0f)) {
1052 alpha_real[k][0] = 0.0f;
1053 alpha_imag[k][0] = 0.0f;
1054 alpha_real[k][1] = 0.0f;
1055 alpha_imag[k][1] = 0.0f;
1056 }
1057 }
1058
1059 goal_sb = (WORD32)(2.048e6f / fs + 0.5f);
1060 {
1061 WORD32 index;
1062 if (goal_sb < f_master_tbl[num_mf_bands]) {
1063 for (index = 0; (f_master_tbl[index] < goal_sb); index++)
1064 ;
1065 goal_sb = f_master_tbl[index];
1066 } else {
1067 goal_sb = f_master_tbl[num_mf_bands];
1068 }
1069 }
1070
1071 source_start_band = xover_offset + 1;
1072 sb = lsb + xover_offset;
1073
1074 patch = 0;
1075 while (sb < usb) {
1076 if (MAX_NUM_PATCHES <= patch) return -1;
1077 ptr_frame_data->patch_param.start_subband[patch] = sb;
1078 num_bands_in_patch = goal_sb - sb;
1079
1080 if (num_bands_in_patch >= lsb - source_start_band) {
1081 patch_stride = sb - source_start_band;
1082 patch_stride = patch_stride & ~1;
1083 num_bands_in_patch = lsb - (sb - patch_stride);
1084 num_bands_in_patch =
1085 ixheaacd_find_closest_entry(sb + num_bands_in_patch, f_master_tbl,
1086 (WORD16)(num_mf_bands), 0) -
1087 (WORD32)(sb);
1088 }
1089
1090 patch_stride = num_bands_in_patch + sb - lsb;
1091 patch_stride = (patch_stride + 1) & ~1;
1092
1093 source_start_band = 1;
1094
1095 if (goal_sb - (sb + num_bands_in_patch) < 3) {
1096 goal_sb = usb;
1097 }
1098
1099 if ((num_bands_in_patch < 3) && (patch > 0) &&
1100 (sb + num_bands_in_patch == usb)) {
1101 for (i = start_sample + slope_length; i < end_sample + slope_length;
1102 i++) {
1103 for (k2 = sb; k2 < sb + num_bands_in_patch; k2++) {
1104 ptr_dst_buf_real[i][k2] = 0.0f;
1105 ptr_dst_buf_imag[i][k2] = 0.0f;
1106 }
1107 }
1108
1109 break;
1110 }
1111
1112 if (num_bands_in_patch <= 0) {
1113 return -1;
1114 }
1115
1116 for (k2 = sb; k2 < sb + num_bands_in_patch; k2++) {
1117 k = k2 - patch_stride;
1118 bw_index = 0;
1119 while (k2 >= ptr_invf_band_tbl[bw_index]) bw_index++;
1120
1121 bw = bw_array[bw_index];
1122
1123 a0r = bw * alpha_real[k][0];
1124 a0i = bw * alpha_imag[k][0];
1125 bw *= bw;
1126 a1r = bw * alpha_real[k][1];
1127 a1i = bw * alpha_imag[k][1];
1128
1129 if (pre_proc_flag) {
1130 gain = gain_vector[k];
1131 } else {
1132 gain = 1.0f;
1133 }
1134
1135 for (i = start_sample + slope_length; i < end_sample + slope_length;
1136 i++) {
1137 ptr_dst_buf_real[i][k2] = ptr_src_buf_real[i][k] * gain;
1138
1139 ptr_dst_buf_imag[i][k2] = ptr_src_buf_imag[i][k] * gain;
1140
1141 if (bw > 0.0f) {
1142 ptr_dst_buf_real[i][k2] += (a0r * ptr_src_buf_real[i - 1][k] -
1143 a0i * ptr_src_buf_imag[i - 1][k] +
1144 a1r * ptr_src_buf_real[i - 2][k] -
1145 a1i * ptr_src_buf_imag[i - 2][k]) *
1146 gain;
1147 ptr_dst_buf_imag[i][k2] += (a0i * ptr_src_buf_real[i - 1][k] +
1148 a0r * ptr_src_buf_imag[i - 1][k] +
1149 a1i * ptr_src_buf_real[i - 2][k] +
1150 a1r * ptr_src_buf_imag[i - 2][k]) *
1151 gain;
1152 }
1153 }
1154 }
1155 sb += num_bands_in_patch;
1156 patch++;
1157 }
1158 }
1159
1160 if (hbe_flag && !sbr_patching_mode) {
1161 FLOAT32 alpha_real[2], alpha_imag[2];
1162
1163 bw_index = 0, patch = 1;
1164
1165 for (k2 = sub_band_start; k2 < f_master_tbl[num_mf_bands]; k2++) {
1166 ixheaacd_esbr_calc_co_variance(&str_auto_corr, &ptr_ph_vocod_buf_real[0],
1167 &ptr_ph_vocod_buf_imag[0], k2, co_var_len);
1168
1169 if (str_auto_corr.det == 0.0f) {
1170 alpha_real[1] = alpha_imag[1] = 0;
1171 } else {
1172 fac = 1.0f / str_auto_corr.det;
1173 alpha_real[1] =
1174 (str_auto_corr.phi_0_1_real * str_auto_corr.phi_1_2_real -
1175 str_auto_corr.phi_0_1_imag * str_auto_corr.phi_1_2_imag -
1176 str_auto_corr.phi_0_2_real * str_auto_corr.phi_1_1) *
1177 fac;
1178 alpha_imag[1] =
1179 (str_auto_corr.phi_0_1_imag * str_auto_corr.phi_1_2_real +
1180 str_auto_corr.phi_0_1_real * str_auto_corr.phi_1_2_imag -
1181 str_auto_corr.phi_0_2_imag * str_auto_corr.phi_1_1) *
1182 fac;
1183 }
1184
1185 if (str_auto_corr.phi_1_1 == 0) {
1186 alpha_real[0] = alpha_imag[0] = 0;
1187 } else {
1188 fac = 1.0f / str_auto_corr.phi_1_1;
1189 alpha_real[0] = -(str_auto_corr.phi_0_1_real +
1190 alpha_real[1] * str_auto_corr.phi_1_2_real +
1191 alpha_imag[1] * str_auto_corr.phi_1_2_imag) *
1192 fac;
1193 alpha_imag[0] = -(str_auto_corr.phi_0_1_imag +
1194 alpha_imag[1] * str_auto_corr.phi_1_2_real -
1195 alpha_real[1] * str_auto_corr.phi_1_2_imag) *
1196 fac;
1197 }
1198
1199 if (alpha_real[0] * alpha_real[0] + alpha_imag[0] * alpha_imag[0] >=
1200 16.0f ||
1201 alpha_real[1] * alpha_real[1] + alpha_imag[1] * alpha_imag[1] >=
1202 16.0f) {
1203 alpha_real[0] = 0.0f;
1204 alpha_imag[0] = 0.0f;
1205 alpha_real[1] = 0.0f;
1206 alpha_imag[1] = 0.0f;
1207 }
1208
1209 while (k2 >= ptr_invf_band_tbl[bw_index]) bw_index++;
1210
1211 bw = bw_array[bw_index];
1212
1213 a0r = bw * alpha_real[0];
1214 a0i = bw * alpha_imag[0];
1215 bw *= bw;
1216 a1r = bw * alpha_real[1];
1217 a1i = bw * alpha_imag[1];
1218
1219 if (bw > 0.0f) {
1220 for (i = start_sample; i < end_sample; i++) {
1221 FLOAT32 real1, imag1, real2, imag2, realTarget, imag_target;
1222
1223 realTarget = ptr_ph_vocod_buf_real[i][k2];
1224 imag_target = ptr_ph_vocod_buf_imag[i][k2];
1225 real1 = ptr_ph_vocod_buf_real[i - 1][k2];
1226 imag1 = ptr_ph_vocod_buf_imag[i - 1][k2];
1227 real2 = ptr_ph_vocod_buf_real[i - 2][k2];
1228 imag2 = ptr_ph_vocod_buf_imag[i - 2][k2];
1229 realTarget +=
1230 ((a0r * real1 - a0i * imag1) + (a1r * real2 - a1i * imag2));
1231 imag_target +=
1232 ((a0i * real1 + a0r * imag1) + (a1i * real2 + a1r * imag2));
1233
1234 ptr_dst_buf_real[i][k2] = realTarget;
1235 ptr_dst_buf_imag[i][k2] = imag_target;
1236 }
1237 } else {
1238 for (i = start_sample; i < end_sample; i++) {
1239 ptr_dst_buf_real[i][k2] = ptr_ph_vocod_buf_real[i][k2];
1240 ptr_dst_buf_imag[i][k2] = ptr_ph_vocod_buf_imag[i][k2];
1241 }
1242 }
1243 }
1244 }
1245 ptr_frame_data->patch_param.num_patches = patch;
1246 if (patch >= (MAX_NUM_PATCHES + 1)) return -1;
1247 for (i = 0; i < num_if_bands; i++) {
1248 bw_array_prev[i] = bw_array[i];
1249 }
1250 return 0;
1251 }
1252