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 <assert.h>
21 #include <float.h>
22 #include <stdlib.h>
23 #include <stdio.h>
24 #include <math.h>
25 #include <string.h>
26
27 #include "ixheaacd_type_def.h"
28 #include "ixheaacd_bitbuffer.h"
29 #include "ixheaacd_interface.h"
30 #include "ixheaacd_tns_usac.h"
31 #include "ixheaacd_cnst.h"
32 #include "ixheaacd_acelp_info.h"
33
34 #include "ixheaacd_sbrdecsettings.h"
35 #include "ixheaacd_info.h"
36 #include "ixheaacd_sbr_common.h"
37 #include "ixheaacd_drc_data_struct.h"
38 #include "ixheaacd_drc_dec.h"
39 #include "ixheaacd_sbrdecoder.h"
40 #include "ixheaacd_mps_polyphase.h"
41 #include "ixheaacd_sbr_const.h"
42 #include "ixheaacd_main.h"
43 #include "ixheaacd_arith_dec.h"
44
45 #include "ixheaacd_func_def.h"
46 #include "ixheaacd_windows.h"
47 #include "ixheaacd_acelp_com.h"
48 #include "ixheaacd_constants.h"
49 #include "ixheaacd_basic_ops32.h"
50 #include "ixheaacd_basic_ops40.h"
51
52 #define LSF_GAP_F 50.0f
53 #define FREQ_MAX_F 6400.0f
54 #define FREQ_DIV_F 400.0f
55
56 extern const FLOAT32 lsf_init[ORDER];
57
58 extern const FLOAT32 ixheaacd_fir_lp_filt[1 + FILTER_DELAY];
59
60 const WORD32 ixheaacd_pow_10_i_by_128[128] = {
61 16384, 17788, 19312, 20968, 22765, 24716, 26835,
62 29135, 31632, 34343, 37287, 40483, 43953, 47720,
63 51810, 56251, 61072, 66307, 71990, 78161, 84860,
64 92134, 100030, 108604, 117913, 128019, 138992, 150905,
65 163840, 177882, 193129, 209682, 227654, 247167, 268352,
66 291353, 316325, 343438, 372874, 404834, 439532, 477205,
67 518107, 562515, 610728, 663075, 719908, 781612, 848605,
68 921340, 1000309, 1086046, 1179133, 1280197, 1389925, 1509057,
69 1638400, 1778829, 1931294, 2096827, 2276549, 2471675, 2683525,
70 2913532, 3163255, 3434381, 3728745, 4048340, 4395328, 4772057,
71 5181075, 5625151, 6107289, 6630752, 7199081, 7816122, 8486051,
72 9213400, 10003091, 10860467, 11791330, 12801978, 13899250, 15090570,
73 16384000, 17788290, 19312945, 20968279, 22765494, 24716750, 26835250,
74 29135329, 31632551, 34343813, 37287459, 40483409, 43953287, 47720573,
75 51810757, 56251515, 61072895, 66307521, 71990813, 78161226, 84860513,
76 92134002, 100030911, 108604672, 117913300, 128019781, 138992500, 150905703,
77 163840000, 177882909, 193129453, 209682794, 227654941, 247167501, 268352504,
78 291353298, 316325515, 343438130, 372874596, 404834095, 439532879, 477205734,
79 518107571, 562515151};
80
81 VOID ixheaacd_lsf_weight_2st_flt(float *lsfq, float *w, WORD32 mode);
82
ixheaacd_mult32_m(WORD32 a,WORD32 b)83 static PLATFORM_INLINE WORD32 ixheaacd_mult32_m(WORD32 a, WORD32 b) {
84 WORD32 result;
85 WORD64 temp_result;
86
87 temp_result = (WORD64)a * (WORD64)b;
88 result = (WORD32)(temp_result >> 31);
89
90 return (result);
91 }
92
ixheaacd_reset_acelp_data_fix(ia_usac_data_struct * usac_data,ia_usac_lpd_decoder_handle st,WORD32 * ptr_overlap_buf,WORD32 was_last_short,WORD32 tw_mdct)93 void ixheaacd_reset_acelp_data_fix(ia_usac_data_struct *usac_data,
94 ia_usac_lpd_decoder_handle st,
95 WORD32 *ptr_overlap_buf,
96 WORD32 was_last_short, WORD32 tw_mdct) {
97 WORD32 i;
98
99 if (was_last_short == 1) {
100 st->mode_prev = -2;
101 } else {
102 st->mode_prev = -1;
103 }
104
105 for (i = 0; i < NUM_SUBFR_SUPERFRAME_BY2 - 1; i++) {
106 st->pitch_prev[i] = 64;
107 st->gain_prev[i] = 0;
108 }
109
110 st->bpf_active_prev = 0;
111
112 if (ptr_overlap_buf != NULL && !tw_mdct) {
113 const WORD32 *ptr_window_coeff;
114 WORD32 fac_length;
115 if (was_last_short) {
116 fac_length = (usac_data->ccfl) / 16;
117 } else {
118 fac_length = (usac_data->len_subfrm) / 2;
119 }
120
121 if (fac_length == 48) {
122 ptr_window_coeff = ixheaacd_sine_win_96;
123 } else if (fac_length == 64) {
124 ptr_window_coeff = ixheaacd_sine_win_128;
125 } else if (fac_length == 96) {
126 ptr_window_coeff = ixheaacd_sine_win_192;
127 } else {
128 ptr_window_coeff = ixheaacd_sine_win_256;
129 }
130
131 for (i = 0; i < 2 * fac_length; i++) {
132 ptr_overlap_buf[(usac_data->ccfl) / 2 - fac_length + i] =
133 ixheaacd_mult32_m(
134 ptr_overlap_buf[(usac_data->ccfl) / 2 - fac_length + i],
135 ptr_window_coeff[2 * fac_length - 1 - i]);
136 }
137 for (i = 0; i < (usac_data->ccfl) / 2 - fac_length; i++) {
138 ptr_overlap_buf[(usac_data->ccfl) / 2 + fac_length + i] = 0;
139 }
140
141 if (ptr_overlap_buf != NULL) {
142 for (i = 0; i < (usac_data->len_subfrm) / 2 - fac_length; i++) {
143 st->exc_prev[i] = 0.0f;
144 }
145 for (i = 0; i < 2 * fac_length + 1; i++) {
146 st->exc_prev[(usac_data->len_subfrm) / 2 - fac_length + i] =
147 ptr_overlap_buf[i + usac_data->ccfl / 2 - fac_length - 1] /
148 (float)(16384);
149 }
150 } else {
151 ixheaacd_memset(st->exc_prev, 1 + (2 * FAC_LENGTH));
152 }
153 }
154
155 return;
156 }
157
ixheaacd_fix2flt_data(ia_usac_data_struct * usac_data,ia_usac_lpd_decoder_handle st,WORD32 k)158 VOID ixheaacd_fix2flt_data(ia_usac_data_struct *usac_data,
159 ia_usac_lpd_decoder_handle st, WORD32 k) {
160 WORD32 i;
161 WORD32 fac_length;
162 WORD32 window_sequence_last = usac_data->window_sequence_last[k];
163 WORD32 *p_ola_buffer = usac_data->overlap_data_ptr[k];
164 if (window_sequence_last == EIGHT_SHORT_SEQUENCE) {
165 fac_length = (usac_data->ccfl) / 16;
166 } else {
167 fac_length = (usac_data->len_subfrm) / 2;
168 }
169
170 ixheaacd_memset(st->lp_flt_coeff_a_prev, 2 * (ORDER + 1));
171 ixheaacd_memset(st->xcitation_prev, MAX_PITCH + INTER_LP_FIL_ORDER + 1);
172 ixheaacd_memset(st->synth_prev, MAX_PITCH + SYNTH_DELAY_LMAX);
173 ixheaacd_memset(st->bpf_prev, FILTER_DELAY + LEN_SUBFR);
174
175 st->gain_threshold = 0.0f;
176
177 if (p_ola_buffer != NULL) {
178 for (i = 0; i < (usac_data->len_subfrm) / 2 - fac_length; i++) {
179 st->exc_prev[i] = 0;
180 }
181 for (i = 0; i < 2 * fac_length + 1; i++) {
182 st->exc_prev[(usac_data->len_subfrm) / 2 - fac_length + i] = (FLOAT32)(
183 p_ola_buffer[i + usac_data->ccfl / 2 - fac_length - 1] / 16384.0);
184 }
185 } else {
186 ixheaacd_memset(st->exc_prev, 1 + (2 * FAC_LENGTH));
187 }
188
189 return;
190 }
191
ixheaacd_init_acelp_data(ia_usac_data_struct * usac_data,ia_usac_lpd_decoder_handle st)192 void ixheaacd_init_acelp_data(ia_usac_data_struct *usac_data,
193 ia_usac_lpd_decoder_handle st) {
194 ixheaacd_reset_acelp_data_fix(usac_data, st, NULL, 0, 0);
195 }
196
197 #define PI_BY_6400 (PI / 6400.0)
198 #define SCALE1 (6400.0 / PI)
199
ixheaacd_lsp_2_lsf_conversion(float lsp[],float lsf[],WORD32 m)200 void ixheaacd_lsp_2_lsf_conversion(float lsp[], float lsf[], WORD32 m) {
201 short i;
202 for (i = 0; i < m; i++) {
203 lsf[i] = (float)(acos(lsp[i]) * SCALE1);
204 }
205 return;
206 }
207
ixheaacd_lsf_2_lsp_conversion_float(FLOAT32 lsf[],FLOAT32 lsp[],WORD32 m)208 static VOID ixheaacd_lsf_2_lsp_conversion_float(FLOAT32 lsf[], FLOAT32 lsp[],
209 WORD32 m) {
210 WORD32 i;
211 for (i = 0; i < m; i++)
212 lsp[i] = (FLOAT32)cos((double)lsf[i] * (double)PI_BY_6400);
213
214 return;
215 }
216
ixheaacd_bass_post_filter(FLOAT32 * synth_sig,WORD32 * pitch,FLOAT32 * pitch_gain,FLOAT32 * synth_out,WORD32 len_fr,WORD32 len2,FLOAT32 bpf_prev[])217 static WORD32 ixheaacd_bass_post_filter(FLOAT32 *synth_sig, WORD32 *pitch,
218 FLOAT32 *pitch_gain, FLOAT32 *synth_out,
219 WORD32 len_fr, WORD32 len2,
220 FLOAT32 bpf_prev[]) {
221 WORD32 i, j, sf, num_subfr, pitch_lag, lg;
222 FLOAT32 x_energy, xy_corr, y_energy, norm_corr, energy, gain, tmp, alpha;
223 FLOAT32 noise_buf[FILTER_DELAY + (2 * LEN_SUBFR)], *noise_tmp1, *noise_tmp2,
224 *x, *y;
225
226 noise_tmp1 = noise_buf + FILTER_DELAY;
227 noise_tmp2 = noise_buf + FILTER_DELAY + LEN_SUBFR;
228
229 memcpy(synth_out, synth_sig - LEN_SUBFR, len_fr * sizeof(FLOAT32));
230
231 if (len_fr % 64)
232 memset(synth_out + len_fr, 0, (LEN_SUBFR - len_fr % 64) * sizeof(FLOAT32));
233
234 sf = 0;
235 for (num_subfr = 0; num_subfr < len_fr; num_subfr += LEN_SUBFR, sf++) {
236 pitch_lag = pitch[sf];
237 gain = pitch_gain[sf];
238 if (((pitch_lag >> 1) + 96 - num_subfr) > MAX_PITCH) return -1;
239 if (gain > 1.0f) gain = 1.0f;
240 if (gain < 0.0f) gain = 0.0f;
241
242 x = &synth_sig[num_subfr - 96];
243 y = &synth_sig[num_subfr - pitch_lag / 2 - 96];
244
245 x_energy = 0.01f;
246 xy_corr = 0.01f;
247 y_energy = 0.01f;
248 for (i = 0; i < LEN_SUBFR + 96; i++) {
249 x_energy += x[i] * x[i];
250 xy_corr += x[i] * y[i];
251 y_energy += y[i] * y[i];
252 }
253
254 norm_corr = xy_corr / (FLOAT32)sqrt(x_energy * y_energy);
255
256 if (norm_corr > 0.95f) pitch_lag >>= 1;
257
258 lg = len_fr + len2 - pitch_lag - num_subfr;
259 if (lg < 0) lg = 0;
260 if (lg > LEN_SUBFR) lg = LEN_SUBFR;
261
262 if (gain > 0) {
263 if (lg > 0) {
264 tmp = 0.01f;
265 for (i = 0; i < lg; i++) {
266 tmp += synth_sig[i + num_subfr] * synth_sig[i + num_subfr];
267 }
268 energy = 0.01f;
269 for (i = 0; i < lg; i++) {
270 energy += synth_sig[i + num_subfr + pitch_lag] *
271 synth_sig[i + num_subfr + pitch_lag];
272 }
273 tmp = (FLOAT32)sqrt(tmp / energy);
274 if (tmp < gain) gain = tmp;
275 }
276
277 alpha = 0.5f * gain;
278 for (i = 0; i < lg; i++) {
279 noise_tmp2[i] = alpha * (synth_sig[i + num_subfr] -
280 0.5f * synth_sig[i + num_subfr - pitch_lag] -
281 0.5f * synth_sig[i + num_subfr + pitch_lag]);
282 }
283 for (i = lg; i < LEN_SUBFR; i++) {
284 noise_tmp2[i] = alpha * (synth_sig[i + num_subfr] -
285 synth_sig[i + num_subfr - pitch_lag]);
286 }
287 } else {
288 memset(noise_tmp2, 0, LEN_SUBFR * sizeof(FLOAT32));
289 }
290
291 memcpy(noise_buf, bpf_prev, (FILTER_DELAY + LEN_SUBFR) * sizeof(FLOAT32));
292 memcpy(bpf_prev, noise_buf + LEN_SUBFR,
293 (FILTER_DELAY + LEN_SUBFR) * sizeof(FLOAT32));
294
295 for (i = 0; i < LEN_SUBFR; i++) {
296 tmp = ixheaacd_fir_lp_filt[0] * noise_tmp1[i];
297 for (j = 1; j <= FILTER_DELAY; j++) {
298 tmp +=
299 ixheaacd_fir_lp_filt[j] * (noise_tmp1[i - j] + noise_tmp1[i + j]);
300 }
301 synth_out[i + num_subfr] -= tmp;
302 }
303 }
304
305 return 0;
306 }
307
ixheaacd_reorder_lsf(float * lsf,float min_dist,int n)308 void ixheaacd_reorder_lsf(float *lsf, float min_dist, int n) {
309 int i;
310 float lsf_min;
311
312 lsf_min = min_dist;
313 for (i = 0; i < n; i++) {
314 if (lsf[i] < lsf_min) lsf[i] = lsf_min;
315
316 lsf_min = lsf[i] + min_dist;
317 }
318
319 lsf_min = FREQ_MAX_F - min_dist;
320 for (i = n - 1; i >= 0; i--) {
321 if (lsf[i] > lsf_min) lsf[i] = lsf_min;
322
323 lsf_min = lsf[i] - min_dist;
324 }
325
326 return;
327 }
328
ixheaacd_lpd_dec(ia_usac_data_struct * usac_data,ia_usac_lpd_decoder_handle st,ia_td_frame_data_struct * pstr_td_frame_data,FLOAT32 fsynth[],WORD32 first_lpd_flag,WORD32 short_fac_flag,WORD32 bpf_control_info)329 WORD32 ixheaacd_lpd_dec(ia_usac_data_struct *usac_data,
330 ia_usac_lpd_decoder_handle st,
331 ia_td_frame_data_struct *pstr_td_frame_data,
332 FLOAT32 fsynth[], WORD32 first_lpd_flag,
333 WORD32 short_fac_flag, WORD32 bpf_control_info) {
334 FLOAT32 *synth_buf = usac_data->synth_buf;
335 FLOAT32 *xcitation_buff = usac_data->exc_buf;
336 FLOAT32 lsp_curr[ORDER];
337 FLOAT32 lsf_curr[ORDER];
338 FLOAT32 *lp_flt_coff_a = usac_data->lp_flt_coff;
339 FLOAT32 *synth, *xcitation_curr;
340 WORD32 *pitch = usac_data->pitch;
341 FLOAT32 *pitch_gain = usac_data->pitch_gain;
342 FLOAT32 lsf_flt[(2 * NUM_FRAMES + 1) * ORDER];
343
344 WORD32 i, k, tp, mode;
345 WORD32 *mod;
346 FLOAT32 gain, stability_factor;
347 FLOAT32 tmp, synth_corr, synth_energy;
348
349 WORD32 len_fr;
350 WORD32 len_subfrm;
351 WORD32 num_subfr;
352 WORD32 num_subfr_in_superfr;
353 WORD32 num_subfr_by2;
354 WORD32 synth_delay;
355 WORD32 num_samples = 0;
356
357 WORD32 *ptr_scratch = &usac_data->scratch_buffer[0];
358
359 WORD32 subfr_len, n_subfr;
360 WORD32 err = 0;
361
362 len_fr = usac_data->ccfl;
363 len_subfrm = usac_data->len_subfrm;
364 num_subfr = usac_data->num_subfrm;
365 num_subfr_in_superfr = NUM_FRAMES * num_subfr;
366 num_subfr_by2 = (num_subfr_in_superfr / 2) - 1;
367 synth_delay = num_subfr_by2 * LEN_SUBFR;
368
369 synth = synth_buf + MAX_PITCH + synth_delay;
370 ixheaacd_mem_cpy(st->synth_prev, synth_buf, MAX_PITCH + synth_delay);
371 ixheaacd_memset(synth, SYNTH_DELAY_LMAX + LEN_SUPERFRAME - synth_delay);
372
373 xcitation_curr = xcitation_buff + MAX_PITCH + INTER_LP_FIL_ORDER + 1;
374 ixheaacd_mem_cpy(st->xcitation_prev, xcitation_buff,
375 MAX_PITCH + INTER_LP_FIL_ORDER + 1);
376 memset(xcitation_curr, 0, sizeof(FLOAT32) * (LEN_SUPERFRAME + 1));
377
378 mod = pstr_td_frame_data->mod;
379
380 for (i = 0; i < num_subfr_by2; i++) {
381 pitch[i] = st->pitch_prev[i];
382 pitch_gain[i] = st->gain_prev[i];
383 }
384 for (i = 0; i < num_subfr_in_superfr; i++) {
385 pitch[i + num_subfr_by2] = 64;
386 pitch_gain[i + num_subfr_by2] = 0.0f;
387 }
388 if (!first_lpd_flag) {
389 ixheaacd_lsp_2_lsf_conversion(st->lspold, lsf_flt, ORDER);
390 }
391
392 ixheaacd_alg_vec_dequant(pstr_td_frame_data, first_lpd_flag, lsf_flt,
393 pstr_td_frame_data->mod);
394
395 if (first_lpd_flag) {
396 ixheaacd_mem_cpy(&lsf_flt[0], st->lsf_prev, ORDER);
397 ixheaacd_lsf_2_lsp_conversion_float(st->lsf_prev, st->lspold, ORDER);
398 }
399
400 if ((first_lpd_flag && mod[0] == 0) || (first_lpd_flag && mod[1] == 0) ||
401 ((first_lpd_flag && mod[2] == 0 && len_subfrm != LEN_FRAME))) {
402 FLOAT32 lp_flt_coeff_a[9 * (ORDER + 1)];
403 FLOAT32 tmp_buf[3 * LEN_FRAME + ORDER];
404 FLOAT32 tmp_res_buf[3 * LEN_FRAME];
405 FLOAT32 *tmp = &(tmp_buf[LEN_FRAME]);
406 FLOAT32 *ptr_tmp = &(tmp_res_buf[LEN_FRAME]);
407 WORD32 tmp_start;
408 FLOAT32 mem = 0;
409 WORD32 gain;
410 WORD32 length;
411
412 ixheaacd_interpolation_lsp_params(st->lspold, st->lspold, lp_flt_coeff_a,
413 8);
414
415 memcpy(st->lp_flt_coeff_a_prev, lp_flt_coeff_a,
416 (ORDER + 1) * sizeof(FLOAT32));
417 memcpy(st->lp_flt_coeff_a_prev + ORDER + 1, lp_flt_coeff_a,
418 (ORDER + 1) * sizeof(FLOAT32));
419
420 if (mod[0] == 0) {
421 WORD32 fac_length;
422 if (short_fac_flag) {
423 fac_length = (len_subfrm * NUM_FRAMES) / 16;
424 } else {
425 fac_length = len_subfrm / 2;
426 }
427 if ((pstr_td_frame_data->fac_data[0] < 0) ||
428 (pstr_td_frame_data->fac_data[0] > 128)) {
429 return -1;
430 }
431 gain = ixheaacd_pow_10_i_by_128[pstr_td_frame_data->fac_data[0]];
432
433 memcpy(ptr_scratch, &pstr_td_frame_data->fac_data[0],
434 129 * sizeof(WORD32));
435
436 for (i = 0; i < fac_length / 2; i++) {
437 pstr_td_frame_data->fac_data[i] = ptr_scratch[2 * i + 1] << 16;
438 pstr_td_frame_data->fac_data[fac_length / 2 + i] =
439 ptr_scratch[fac_length - 2 * i] << 16;
440 }
441
442 err = ixheaacd_fwd_alias_cancel_tool(usac_data, pstr_td_frame_data,
443 fac_length, lp_flt_coeff_a, gain);
444 if (err == -1) return err;
445
446 memset(
447 &usac_data->overlap_data_ptr[usac_data->present_chan][(len_fr / 2)],
448 0, fac_length * sizeof(WORD32));
449 }
450
451 for (i = 0; i < 2 * len_subfrm; i++)
452 st->fd_synth[ORDER + i] = (FLOAT32)(
453 (FLOAT32)usac_data->overlap_data_ptr[usac_data->present_chan][i] /
454 16384.0);
455 num_samples = min(2 * len_subfrm, MAX_PITCH + synth_delay);
456
457 ixheaacd_mem_cpy(st->fd_synth + ORDER, synth - 2 * len_subfrm,
458 2 * len_subfrm);
459
460 ixheaacd_preemphsis_tool_float(st->fd_synth + ORDER, PREEMPH_FILT_FAC,
461 2 * len_subfrm, mem);
462
463 ixheaacd_memset(tmp, ORDER);
464 ixheaacd_mem_cpy(st->fd_synth + ORDER, tmp + ORDER, 2 * len_subfrm);
465 tmp_start = 0;
466
467 ixheaacd_memset(ptr_tmp - len_subfrm, 3 * len_subfrm);
468 memset(st->fd_synth, 0, ORDER * sizeof(WORD32));
469 length = (2 * len_subfrm - tmp_start) / LEN_SUBFR;
470
471 ixheaacd_residual_tool_float1(lp_flt_coeff_a,
472 &st->fd_synth[ORDER + tmp_start],
473 &ptr_tmp[tmp_start], LEN_SUBFR, length);
474
475 if (mod[0] != 0 && (len_subfrm == LEN_FRAME || mod[1] != 0)) {
476 num_samples = min(len_subfrm, MAX_PITCH + INTER_LP_FIL_ORDER + 1);
477 } else {
478 num_samples = min(2 * len_subfrm, MAX_PITCH + INTER_LP_FIL_ORDER + 1);
479 }
480 ixheaacd_mem_cpy(ptr_tmp + 2 * len_subfrm - num_samples,
481 xcitation_curr - num_samples, num_samples);
482 }
483
484 k = 0;
485
486 while (k < 4) {
487 mode = mod[k];
488 if ((st->mode_prev == 0) && (mode > 0) &&
489 (k != 0 || st->bpf_active_prev == 1)) {
490 i = (k * num_subfr) + num_subfr_by2;
491 pitch[i + 1] = pitch[i] = pitch[i - 1];
492 pitch_gain[i + 1] = pitch_gain[i] = pitch_gain[i - 1];
493 }
494
495 if ((mode == 0) || (mode == 1))
496 memcpy(lsf_curr, &lsf_flt[(k + 1) * ORDER], ORDER * sizeof(FLOAT32));
497 else if (mode == 2)
498 memcpy(lsf_curr, &lsf_flt[(k + 2) * ORDER], ORDER * sizeof(FLOAT32));
499 else
500 memcpy(lsf_curr, &lsf_flt[(k + 4) * ORDER], ORDER * sizeof(FLOAT32));
501
502 ixheaacd_lsf_2_lsp_conversion_float(lsf_curr, lsp_curr, ORDER);
503
504 tmp = 0.0f;
505 for (i = 0; i < ORDER; i++) {
506 tmp += (lsf_curr[i] - st->lsf_prev[i]) * (lsf_curr[i] - st->lsf_prev[i]);
507 }
508 stability_factor = (FLOAT32)(1.25f - (tmp / 400000.0f));
509 if (stability_factor > 1.0f) {
510 stability_factor = 1.0f;
511 }
512 if (stability_factor < 0.0f) {
513 stability_factor = 0.0f;
514 }
515
516 if (mode == 0) {
517 ixheaacd_interpolation_lsp_params(st->lspold, lsp_curr, lp_flt_coff_a,
518 num_subfr);
519
520 err = ixheaacd_acelp_alias_cnx(usac_data, pstr_td_frame_data, k,
521 lp_flt_coff_a, stability_factor, st);
522 if (err) return err;
523
524 if ((st->mode_prev != 0) && bpf_control_info) {
525 i = (k * num_subfr) + num_subfr_by2;
526 pitch[i - 1] = pitch[i];
527 pitch_gain[i - 1] = pitch_gain[i];
528 if (st->mode_prev != -2) {
529 pitch[i - 2] = pitch[i];
530 pitch_gain[i - 2] = pitch_gain[i];
531 }
532 }
533 k++;
534 } else {
535 if (mode == 1) {
536 subfr_len = len_subfrm;
537 n_subfr = num_subfr;
538 } else if (mode == 2) {
539 subfr_len = len_subfrm << 1;
540 n_subfr = num_subfr_in_superfr / 2;
541 } else if (mode == 3) {
542 subfr_len = len_subfrm << 2;
543 n_subfr = num_subfr_in_superfr;
544 }
545
546 ixheaacd_lpc_coef_gen(st->lspold, lsp_curr, lp_flt_coff_a, n_subfr,
547 ORDER);
548
549 err = ixheaacd_tcx_mdct(usac_data, pstr_td_frame_data, k, lp_flt_coff_a,
550 subfr_len, st);
551 if (err) return err;
552 k += (1 << (mode - 1));
553 }
554
555 st->mode_prev = mode;
556
557 ixheaacd_mem_cpy(lsp_curr, st->lspold, ORDER);
558 ixheaacd_mem_cpy(lsf_curr, st->lsf_prev, ORDER);
559 }
560
561 ixheaacd_mem_cpy(xcitation_buff + len_fr, st->xcitation_prev,
562 MAX_PITCH + INTER_LP_FIL_ORDER + 1);
563
564 ixheaacd_mem_cpy(synth_buf + len_fr, st->synth_prev, MAX_PITCH + synth_delay);
565
566 if (!bpf_control_info) {
567 if (mod[0] != 0 && st->bpf_active_prev) {
568 for (i = 2; i < num_subfr_in_superfr; i++)
569 pitch_gain[num_subfr_by2 + i] = 0.0;
570 } else {
571 for (i = 0; i < num_subfr_in_superfr; i++)
572 pitch_gain[num_subfr_by2 + i] = 0.0;
573 }
574 }
575 st->bpf_active_prev = bpf_control_info;
576
577 for (i = 0; i < num_subfr_by2; i++) {
578 st->pitch_prev[i] = pitch[num_subfr_in_superfr + i];
579 st->gain_prev[i] = pitch_gain[num_subfr_in_superfr + i];
580 }
581
582 synth = synth_buf + MAX_PITCH;
583
584 for (i = 0; i < num_subfr_in_superfr; i++) {
585 tp = pitch[i];
586 gain = pitch_gain[i];
587 if (gain > 0.0f) {
588 synth_corr = 0.0f, synth_energy = 1e-6f;
589 if ((((i * LEN_SUBFR) + LEN_SUBFR) > LEN_SUPERFRAME) ||
590 ((((i * LEN_SUBFR) + LEN_SUBFR) - tp) > LEN_SUPERFRAME))
591 return -1;
592 for (k = 0; k < LEN_SUBFR; k++) {
593 synth_corr +=
594 synth[i * LEN_SUBFR + k] * synth[(i * LEN_SUBFR) - tp + k];
595 synth_energy +=
596 synth[(i * LEN_SUBFR) - tp + k] * synth[(i * LEN_SUBFR) - tp + k];
597 }
598 pitch_gain[i] = synth_corr / synth_energy;
599 }
600 }
601
602 if (mod[3] == 0) {
603 err = ixheaacd_bass_post_filter(synth, pitch, pitch_gain, fsynth, len_fr,
604 synth_delay, st->bpf_prev);
605 } else {
606 err =
607 ixheaacd_bass_post_filter(synth, pitch, pitch_gain, fsynth, len_fr,
608 synth_delay - (len_subfrm / 2), st->bpf_prev);
609 }
610 return err;
611 }
612
ixheaacd_lpd_dec_update(ia_usac_lpd_decoder_handle tddec,ia_usac_data_struct * usac_data,WORD32 i_ch)613 VOID ixheaacd_lpd_dec_update(ia_usac_lpd_decoder_handle tddec,
614 ia_usac_data_struct *usac_data, WORD32 i_ch) {
615 WORD32 i, k;
616
617 WORD32 *ptr_overlap = &usac_data->overlap_data_ptr[i_ch][0];
618 WORD32 len_fr, lpd_sbf_len, lpd_delay, num_subfr_by2, synth_delay, fac_length;
619
620 if (usac_data->tw_mdct[0])
621 ptr_overlap = &usac_data->overlap_data_ptr[i_ch][usac_data->ccfl / 2];
622
623 len_fr = usac_data->ccfl;
624 lpd_sbf_len = (NUM_FRAMES * usac_data->num_subfrm) / 2;
625 lpd_delay = lpd_sbf_len * LEN_SUBFR;
626 num_subfr_by2 = lpd_sbf_len - 1;
627 synth_delay = num_subfr_by2 * LEN_SUBFR;
628 fac_length = (usac_data->len_subfrm) / 2;
629
630 for (i = 0; i < LEN_SUBFR + synth_delay; i++)
631 ptr_overlap[i] = (WORD32)(
632 (FLOAT32)tddec->synth_prev[MAX_PITCH - (LEN_SUBFR) + i] * 16384.0);
633
634 ptr_overlap += LEN_SUBFR + synth_delay - fac_length;
635
636 for (k = 0; k < 2 * fac_length; k++)
637 ptr_overlap[k] = (WORD32)((FLOAT32)tddec->exc_prev[k + 1] * 16384.0);
638
639 ptr_overlap = &usac_data->overlap_data_ptr[i_ch][lpd_delay + fac_length];
640
641 for (i = 0; i < len_fr - lpd_delay - fac_length; i++) ptr_overlap[i] = 0;
642
643 usac_data->window_shape[i_ch] = WIN_SEL_0;
644 usac_data->window_sequence_last[i_ch] = EIGHT_SHORT_SEQUENCE;
645 usac_data->td_frame_prev[i_ch] = 1;
646
647 if (tddec->mode_prev == 0) {
648 memmove(usac_data->lpc_prev[i_ch], &tddec->lp_flt_coeff_a_prev[ORDER + 1],
649 (ORDER + 1) * sizeof(FLOAT32));
650 memmove(usac_data->acelp_in[i_ch], tddec->exc_prev,
651 (1 + (2 * FAC_LENGTH)) * sizeof(FLOAT32));
652 }
653
654 return;
655 }
656
ixheaacd_lpd_bpf_fix(ia_usac_data_struct * usac_data,WORD32 is_short_flag,FLOAT32 out_buffer[],ia_usac_lpd_decoder_handle st)657 WORD32 ixheaacd_lpd_bpf_fix(ia_usac_data_struct *usac_data,
658 WORD32 is_short_flag, FLOAT32 out_buffer[],
659 ia_usac_lpd_decoder_handle st) {
660 WORD32 i, tp, k;
661 float synth_buf[MAX_PITCH + SYNTH_DELAY_LMAX + LEN_SUPERFRAME];
662 float signal_out[LEN_SUPERFRAME];
663 float *synth, synth_corr, synth_energy;
664 WORD32 pitch[NUM_SUBFR_SUPERFRAME_BY2 + 3];
665 float pitch_gain[NUM_SUBFR_SUPERFRAME_BY2 + 3];
666 WORD32 len_fr, lpd_sbf_len, lpd_delay, num_subfr_by2, synth_delay, fac_length;
667 WORD32 err = 0;
668
669 len_fr = usac_data->ccfl;
670 lpd_sbf_len = (NUM_FRAMES * usac_data->num_subfrm) / 2;
671 lpd_delay = lpd_sbf_len * LEN_SUBFR;
672 num_subfr_by2 = lpd_sbf_len - 1;
673 synth_delay = num_subfr_by2 * LEN_SUBFR;
674 fac_length = (usac_data->len_subfrm) / 2;
675
676 ixheaacd_memset(synth_buf, MAX_PITCH + synth_delay + len_fr);
677 ixheaacd_mem_cpy(st->synth_prev, synth_buf, MAX_PITCH + synth_delay);
678 ixheaacd_mem_cpy(out_buffer, synth_buf + MAX_PITCH - (LEN_SUBFR),
679 synth_delay + len_fr + (LEN_SUBFR));
680
681 for (i = 0; i < num_subfr_by2; i++) {
682 pitch[i] = st->pitch_prev[i];
683 pitch_gain[i] = st->gain_prev[i];
684 }
685 for (i = num_subfr_by2; i < lpd_sbf_len + 3; i++) {
686 pitch[i] = 64;
687 pitch_gain[i] = 0.0f;
688 }
689 if (st->mode_prev == 0) {
690 pitch[num_subfr_by2] = pitch[num_subfr_by2 - 1];
691 pitch_gain[num_subfr_by2] = pitch_gain[num_subfr_by2 - 1];
692 if (!is_short_flag) {
693 pitch[num_subfr_by2 + 1] = pitch[num_subfr_by2];
694 pitch_gain[num_subfr_by2 + 1] = pitch_gain[num_subfr_by2];
695 }
696 }
697
698 synth = synth_buf + MAX_PITCH;
699
700 for (i = 0; i < num_subfr_by2 + 2; i++) {
701 tp = pitch[i];
702 if ((i * LEN_SUBFR + MAX_PITCH) < tp) {
703 return -1;
704 } else if (((i * LEN_SUBFR + MAX_PITCH - tp) >= 1883) ||
705 (((i * LEN_SUBFR) + LEN_SUBFR) > LEN_SUPERFRAME) ||
706 ((((i * LEN_SUBFR) + LEN_SUBFR) - tp) > LEN_SUPERFRAME)) {
707 return -1;
708 }
709
710 if (pitch_gain[i] > 0.0f) {
711 synth_corr = 0.0f, synth_energy = 1e-6f;
712 for (k = 0; k < LEN_SUBFR; k++) {
713 synth_corr +=
714 synth[i * LEN_SUBFR + k] * synth[(i * LEN_SUBFR) - tp + k];
715 synth_energy +=
716 synth[(i * LEN_SUBFR) - tp + k] * synth[(i * LEN_SUBFR) - tp + k];
717 }
718 pitch_gain[i] = synth_corr / synth_energy;
719 }
720 }
721
722 err = ixheaacd_bass_post_filter(synth, pitch, pitch_gain, signal_out,
723 (lpd_sbf_len + 2) * LEN_SUBFR + LEN_SUBFR,
724 len_fr - (lpd_sbf_len + 4) * LEN_SUBFR,
725 st->bpf_prev);
726 if (err != 0) return err;
727
728 ixheaacd_mem_cpy(signal_out, out_buffer,
729 (lpd_sbf_len + 2) * LEN_SUBFR + LEN_SUBFR);
730 return err;
731 }
732