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 <math.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24
25 #include "ixheaacd_type_def.h"
26 #include "ixheaacd_interface.h"
27
28 #include "ixheaacd_bitbuffer.h"
29 #include "ixheaacd_interface.h"
30
31 #include "ixheaacd_tns_usac.h"
32 #include "ixheaacd_cnst.h"
33 #include "ixheaacd_acelp_info.h"
34
35 #include "ixheaacd_td_mdct.h"
36
37 #include "ixheaacd_sbrdecsettings.h"
38 #include "ixheaacd_info.h"
39 #include "ixheaacd_sbr_common.h"
40 #include "ixheaacd_drc_data_struct.h"
41 #include "ixheaacd_drc_dec.h"
42 #include "ixheaacd_sbrdecoder.h"
43 #include "ixheaacd_mps_polyphase.h"
44 #include "ixheaacd_sbr_const.h"
45 #include "ixheaacd_main.h"
46 #include "ixheaacd_arith_dec.h"
47 #include "ixheaacd_windows.h"
48
49 #include "ixheaacd_vec_baisc_ops.h"
50 #include "ixheaacd_constants.h"
51 #include "ixheaacd_function_selector.h"
52 #include "ixheaacd_basic_ops32.h"
53 #include "ixheaacd_basic_ops40.h"
54
55 #include "ixheaacd_func_def.h"
56
57 #include "ixheaacd_windows.h"
58
59 extern const WORD32 ixheaacd_pre_post_twid_cos_512[512];
60 extern const WORD32 ixheaacd_pre_post_twid_sin_512[512];
61 extern const WORD32 ixheaacd_pre_post_twid_cos_384[384];
62 extern const WORD32 ixheaacd_pre_post_twid_sin_384[384];
63 extern const WORD32 ixheaacd_pre_post_twid_cos_64[64];
64 extern const WORD32 ixheaacd_pre_post_twid_sin_64[64];
65 extern const WORD32 ixheaacd_pre_post_twid_cos_48[48];
66 extern const WORD32 ixheaacd_pre_post_twid_sin_48[48];
67 extern const FLOAT64 ixheaacd_power_10_table[28];
68
69 #define ABS(A) ((A) < 0 ? (-A) : (A))
70
ixheaacd_calc_max_spectralline(WORD32 * p_in_ibuffer,WORD32 n)71 static WORD32 ixheaacd_calc_max_spectralline(WORD32 *p_in_ibuffer, WORD32 n) {
72 WORD32 k, shiftp, itemp = 0;
73 for (k = 0; k < n; k++) {
74 if (ixheaacd_abs32_sat(p_in_ibuffer[k]) > itemp)
75 itemp = ixheaacd_abs32_sat(p_in_ibuffer[k]);
76 }
77
78 shiftp = ixheaacd_norm32(itemp);
79
80 return (shiftp);
81 }
82
ixheaacd_normalize(WORD32 * buff,WORD32 shift,WORD len)83 static void ixheaacd_normalize(WORD32 *buff, WORD32 shift, WORD len) {
84 WORD32 i;
85
86 for (i = 0; i < len; i++) {
87 buff[i] = buff[i] << shift;
88 }
89 }
90
ixheaacd_pow10(WORD32 input)91 static FLOAT32 ixheaacd_pow10(WORD32 input) {
92 FLOAT32 output = 1;
93 while (input > 0) {
94 output *= 10;
95 input--;
96 }
97 return (output);
98 }
99
ixheaacd_calc_pre_twid_dec(WORD32 * ptr_x,WORD32 * r_ptr,WORD32 * i_ptr,WORD32 nlength,const WORD32 * cos_ptr,const WORD32 * sin_ptr)100 void ixheaacd_calc_pre_twid_dec(WORD32 *ptr_x, WORD32 *r_ptr, WORD32 *i_ptr,
101 WORD32 nlength, const WORD32 *cos_ptr,
102 const WORD32 *sin_ptr) {
103 WORD32 i;
104 WORD32 *ptr_y;
105
106 ptr_y = &ptr_x[2 * nlength - 1];
107
108 for (i = 0; i < nlength; i++) {
109 *r_ptr++ = ((ixheaacd_mult32(ixheaacd_negate32_sat(*ptr_x), (*cos_ptr)) -
110 ixheaacd_mult32((*ptr_y), (*sin_ptr))));
111 *i_ptr++ = ((ixheaacd_mult32((*ptr_y), (*cos_ptr++)) -
112 ixheaacd_mult32((*ptr_x), (*sin_ptr++))));
113 ptr_x += 2;
114 ptr_y -= 2;
115 }
116 }
117
ixheaacd_calc_post_twid_dec(WORD32 * xptr,WORD32 * r_ptr,WORD32 * i_ptr,WORD32 nlength,const WORD32 * cos_ptr,const WORD32 * sin_ptr)118 void ixheaacd_calc_post_twid_dec(WORD32 *xptr, WORD32 *r_ptr, WORD32 *i_ptr,
119 WORD32 nlength, const WORD32 *cos_ptr,
120 const WORD32 *sin_ptr
121
122 ) {
123 WORD32 i;
124 WORD32 *yptr;
125
126 yptr = &xptr[2 * nlength - 1];
127
128 for (i = 0; i < nlength; i++) {
129 *xptr = (-(ixheaacd_mult32((r_ptr[i]), (*cos_ptr)) -
130 ixheaacd_mult32((i_ptr[i]), (*sin_ptr))));
131 *yptr = (-(ixheaacd_mult32((i_ptr[i]), (*cos_ptr++)) +
132 ixheaacd_mult32((r_ptr[i]), (*sin_ptr++))));
133 xptr += 2;
134 yptr -= 2;
135 }
136 }
137
ixheaacd_fft_based_imdct(WORD32 * data,WORD32 npoints,WORD32 * preshift,WORD32 * tmp_data)138 static void ixheaacd_fft_based_imdct(WORD32 *data, WORD32 npoints,
139 WORD32 *preshift, WORD32 *tmp_data) {
140 WORD32 *data_r;
141 WORD32 *data_i;
142 WORD32 nlength = npoints >> 1;
143 const WORD32 *cos_ptr;
144 const WORD32 *sin_ptr;
145
146 data_r = tmp_data;
147 data_i = tmp_data + 512;
148
149 if (nlength == 512) {
150 cos_ptr = ixheaacd_pre_post_twid_cos_512;
151 sin_ptr = ixheaacd_pre_post_twid_sin_512;
152 } else if (nlength == 384) {
153 cos_ptr = ixheaacd_pre_post_twid_cos_384;
154 sin_ptr = ixheaacd_pre_post_twid_sin_384;
155 } else if (nlength == 64) {
156 cos_ptr = ixheaacd_pre_post_twid_cos_64;
157 sin_ptr = ixheaacd_pre_post_twid_sin_64;
158 } else if (nlength == 48) {
159 cos_ptr = ixheaacd_pre_post_twid_cos_48;
160 sin_ptr = ixheaacd_pre_post_twid_sin_48;
161 } else {
162 cos_ptr = ixheaacd_pre_post_twid_cos_48;
163 sin_ptr = ixheaacd_pre_post_twid_sin_48;
164 }
165
166 (*ixheaacd_calc_pre_twid)(data, data_r, data_i, nlength, cos_ptr, sin_ptr);
167 ixheaacd_complex_fft(data_r, data_i, nlength, 1, preshift);
168 (*ixheaacd_calc_post_twid)(data, data_r, data_i, nlength, cos_ptr, sin_ptr);
169 }
170
171 #define N_LONG_LEN_MAX 1024
172
ixheaacd_acelp_imdct(WORD32 * imdct_in,WORD32 npoints,WORD8 * qshift,WORD32 * tmp_data)173 void ixheaacd_acelp_imdct(WORD32 *imdct_in, WORD32 npoints, WORD8 *qshift,
174 WORD32 *tmp_data) {
175 WORD32 preshift = 0;
176 WORD32 i;
177 WORD32 k = (npoints / 2);
178
179 while (((k & 1) == 0) & (k != 1)) {
180 k = k >> 1;
181 preshift++;
182 }
183
184 if ((k != 1)) {
185 for (i = 0; i < (npoints / 2); i++) {
186 imdct_in[i] = (imdct_in[i] / 3) << 1;
187 }
188 preshift++;
189 }
190
191 ixheaacd_fft_based_imdct(imdct_in, npoints / 2, &preshift, tmp_data);
192 preshift += 2;
193 *qshift -= preshift;
194 }
195
ixheaacd_cal_fac_data(ia_usac_data_struct * usac_data,WORD32 i_ch,WORD32 n_long,WORD32 lfac,WORD32 * fac_idata)196 WORD8 ixheaacd_cal_fac_data(ia_usac_data_struct *usac_data, WORD32 i_ch,
197 WORD32 n_long, WORD32 lfac, WORD32 *fac_idata) {
198 WORD32 gain_fac, scale, k, *i_aq, itemp = 0, *izir;
199 WORD32 int_aq[ORDER + 1] = {0};
200 WORD32 intzir[2 * LEN_FRAME] = {0};
201 WORD32 x_in[FAC_LENGTH] = {0};
202 FLOAT32 gain, ztemp, ftemp, pow10, rem10;
203 FLOAT32 qfac1;
204 WORD8 qshift1 = 0;
205 WORD8 qshift2 = 0;
206 WORD8 qshift3 = 0;
207 WORD32 preshift = 0;
208
209 FLOAT32 *last_lpc = usac_data->lpc_prev[i_ch];
210 FLOAT32 *acelp_in = usac_data->acelp_in[i_ch];
211 WORD32 *fac_data = usac_data->fac_data[i_ch];
212 WORD32 *ptr_scratch = &usac_data->scratch_buffer[0];
213
214 WORD32 quo = fac_data[0] / 28;
215 WORD32 rem = fac_data[0] % 28;
216 pow10 = ixheaacd_pow10(quo);
217 rem10 = (FLOAT32)ixheaacd_power_10_table[rem];
218
219 gain = pow10 * rem10;
220 scale = (WORD32)(ixheaacd_norm32((WORD32)((ABS(gain) + 1))));
221 gain_fac = (WORD32)(gain * (FLOAT32)((WORD64)1 << scale));
222 scale += 4;
223 qfac1 = 1.0f / (gain);
224
225 if (acelp_in != NULL) {
226 izir = intzir;
227 ftemp = 0.0;
228 for (k = 0; k < n_long / 4; k++) {
229 ztemp = acelp_in[k] * (qfac1);
230 if (ABS(ztemp) > ftemp) ftemp = ABS(ztemp);
231 }
232
233 itemp = (WORD32)(ftemp);
234 qshift3 = ixheaacd_norm32(itemp);
235
236 for (k = 0; k < n_long / 4; k++) {
237 izir[k] =
238 (WORD32)((acelp_in[k] * (qfac1)) * (FLOAT32)((WORD64)1 << qshift3));
239 }
240 } else
241 izir = NULL;
242
243 if (last_lpc != NULL) {
244 ftemp = 0.0;
245 i_aq = int_aq;
246 for (k = 0; k < ORDER + 1; k++) {
247 if (ABS(last_lpc[k]) > ftemp) ftemp = ABS(last_lpc[k]);
248 }
249
250 itemp = (WORD32)(ftemp);
251 qshift2 = ixheaacd_norm32(itemp);
252
253 for (k = 0; k < ORDER + 1; k++) {
254 i_aq[k] = (WORD32)(last_lpc[k] * (FLOAT32)((WORD64)1 << qshift2));
255 }
256 } else
257 i_aq = NULL;
258
259 for (k = 0; k < lfac; k++) {
260 if (ixheaacd_abs32_sat(fac_data[k + 1]) > itemp)
261 itemp = ixheaacd_abs32_sat(fac_data[k + 1]);
262 }
263
264 qshift1 = ixheaacd_norm32(itemp);
265
266 for (k = 0; k < lfac; k++) {
267 fac_data[k + 1] =
268 (WORD32)(fac_data[k + 1] * (FLOAT32)((WORD64)1 << qshift1));
269 }
270
271 for (k = 0; k < lfac / 2; k++) {
272 x_in[k] = fac_data[2 * k + 1];
273 x_in[lfac / 2 + k] = fac_data[lfac - 2 * k];
274 }
275
276 ixheaacd_fr_alias_cnx_fix(x_in, n_long / 4, lfac, i_aq, izir, fac_idata + 16,
277 &qshift1, qshift2, qshift3, &preshift, ptr_scratch);
278 preshift += 4;
279
280 if (acelp_in != NULL) {
281 for (k = 0; k < 2 * lfac; k++) {
282 fac_idata[k] =
283 ixheaacd_mul32_sh(fac_idata[k + 16], gain_fac, (WORD8)(scale));
284 }
285 }
286 return (qshift1 - preshift);
287 }
288
ixheaacd_fd_imdct_short(ia_usac_data_struct * usac_data,WORD32 i_ch,WORD32 * fac_data_out,offset_lengths * ixheaacd_drc_offset,WORD8 fac_q)289 static WORD32 ixheaacd_fd_imdct_short(ia_usac_data_struct *usac_data,
290 WORD32 i_ch, WORD32 *fac_data_out,
291 offset_lengths *ixheaacd_drc_offset,
292 WORD8 fac_q) {
293 FLOAT32 qfac;
294 WORD32 overlap_data_buf[2 * N_LONG_LEN_MAX] = {0};
295 WORD32 *window_short, k, *window_short_prev_ptr;
296 WORD32 *overlap_data, *fp;
297
298 WORD32 *p_overlap_ibuffer = usac_data->overlap_data_ptr[i_ch];
299 WORD32 *p_in_ibuffer = usac_data->coef_fix[i_ch];
300 FLOAT32 *p_out_buffer = usac_data->time_sample_vector[i_ch];
301 WORD32 *p_out_ibuffer = usac_data->output_data_ptr[i_ch];
302 WORD32 *scratch_mem = usac_data->scratch_buffer;
303 WORD32 td_frame_prev = usac_data->td_frame_prev[i_ch];
304 WORD32 fac_apply = usac_data->fac_data_present[i_ch];
305 WORD8 shiftp, input_q, output_q, shift_olap = 14;
306 WORD32 max_shift;
307
308 WORD32 window_select = usac_data->window_shape[i_ch];
309 WORD32 window_select_prev = usac_data->window_shape_prev[i_ch];
310 ia_usac_lpd_decoder_handle st = usac_data->str_tddec[i_ch];
311 WORD32 err_code = 0;
312
313 max_shift =
314 ixheaacd_calc_max_spectralline(p_in_ibuffer, ixheaacd_drc_offset->n_long);
315 ixheaacd_normalize(p_in_ibuffer, max_shift, ixheaacd_drc_offset->n_long);
316 shiftp = max_shift + 6;
317 input_q = shiftp;
318
319 memcpy(overlap_data_buf, p_overlap_ibuffer,
320 sizeof(WORD32) * ixheaacd_drc_offset->n_long);
321 overlap_data = overlap_data_buf;
322
323 fp = overlap_data + ixheaacd_drc_offset->n_flat_ls;
324
325 for (k = 0; k < 8; k++) {
326 shiftp = input_q;
327 ixheaacd_acelp_imdct(p_in_ibuffer + (k * ixheaacd_drc_offset->n_short),
328 2 * ixheaacd_drc_offset->n_short, &shiftp,
329 scratch_mem);
330 }
331
332 max_shift =
333 ixheaacd_calc_max_spectralline(p_in_ibuffer, ixheaacd_drc_offset->n_long);
334 ixheaacd_normalize(p_in_ibuffer, max_shift - 1, ixheaacd_drc_offset->n_long);
335 shiftp += max_shift - 1;
336
337 err_code = ixheaacd_calc_window(&window_short, ixheaacd_drc_offset->n_short,
338 window_select);
339 if (err_code == -1) return err_code;
340 err_code =
341 ixheaacd_calc_window(&window_short_prev_ptr,
342 ixheaacd_drc_offset->n_trans_ls, window_select_prev);
343 if (err_code == -1) return err_code;
344
345 if (fac_apply)
346 ixheaacd_windowing_short1(p_in_ibuffer + ixheaacd_drc_offset->n_short / 2,
347 window_short_prev_ptr, fp, ixheaacd_drc_offset,
348 shiftp, shift_olap);
349
350 else
351 ixheaacd_windowing_short2(p_in_ibuffer + ixheaacd_drc_offset->n_short / 2,
352 window_short_prev_ptr, fp, ixheaacd_drc_offset,
353 shiftp, shift_olap);
354
355 output_q = ixheaacd_windowing_short3(
356 p_in_ibuffer, window_short + ixheaacd_drc_offset->n_short - 1,
357 fp + ixheaacd_drc_offset->n_short, ixheaacd_drc_offset->n_short, shiftp,
358 shift_olap);
359 p_in_ibuffer += ixheaacd_drc_offset->n_short;
360 fp += ixheaacd_drc_offset->n_short;
361 window_short_prev_ptr = window_short;
362
363 for (k = 1; k < 7; k++) {
364 output_q = ixheaacd_windowing_short4(
365 p_in_ibuffer, window_short_prev_ptr, fp,
366 window_short_prev_ptr + ixheaacd_drc_offset->n_short - 1,
367 ixheaacd_drc_offset->n_short, 1, shiftp, shift_olap, output_q);
368 p_in_ibuffer += ixheaacd_drc_offset->n_short;
369 fp += ixheaacd_drc_offset->n_short;
370 window_short_prev_ptr = window_short;
371 }
372
373 output_q = ixheaacd_windowing_short4(
374 p_in_ibuffer, window_short_prev_ptr, fp,
375 window_short_prev_ptr + ixheaacd_drc_offset->n_short - 1,
376 ixheaacd_drc_offset->n_short, 0, shiftp, shift_olap, output_q);
377 p_in_ibuffer += ixheaacd_drc_offset->n_short;
378 fp += ixheaacd_drc_offset->n_short;
379
380 if (fac_apply) {
381 ixheaacd_combine_fac(overlap_data + ixheaacd_drc_offset->n_flat_ls +
382 ixheaacd_drc_offset->lfac,
383 fac_data_out,
384 overlap_data + ixheaacd_drc_offset->n_flat_ls +
385 ixheaacd_drc_offset->lfac,
386 2 * ixheaacd_drc_offset->lfac, output_q, fac_q);
387 }
388 memset(overlap_data + 2 * ixheaacd_drc_offset->n_long -
389 ixheaacd_drc_offset->n_flat_ls,
390 0, sizeof(WORD32) * ixheaacd_drc_offset->n_flat_ls);
391 ixheaacd_scale_down(overlap_data, overlap_data,
392 ixheaacd_drc_offset->n_flat_ls, shift_olap, output_q);
393
394 ixheaacd_scale_down(p_overlap_ibuffer,
395 overlap_data + ixheaacd_drc_offset->n_long,
396 ixheaacd_drc_offset->n_long, output_q, shift_olap);
397 ixheaacd_scale_down(p_out_ibuffer, overlap_data, ixheaacd_drc_offset->n_long,
398 output_q, 15);
399
400 if (td_frame_prev) {
401 qfac = 1.0f / (FLOAT32)(1 << 15);
402
403 for (k = 0; k < ixheaacd_drc_offset->n_long; k++) {
404 p_out_buffer[k] = ((FLOAT32)p_out_ibuffer[k]) * qfac;
405 }
406 err_code = ixheaacd_lpd_bpf_fix(usac_data, 1, p_out_buffer, st);
407 if (err_code != 0) return err_code;
408
409 for (k = 0; k < ixheaacd_drc_offset->n_long; k++) {
410 p_out_ibuffer[k] = (WORD32)(p_out_buffer[k] * (1 << 15));
411 }
412 }
413
414 return 0;
415 }
416
ixheaacd_fd_imdct_long(ia_usac_data_struct * usac_data,WORD32 i_ch,WORD32 * fac_idata,offset_lengths * ixheaacd_drc_offset,WORD8 fac_q)417 static WORD32 ixheaacd_fd_imdct_long(ia_usac_data_struct *usac_data,
418 WORD32 i_ch, WORD32 *fac_idata,
419 offset_lengths *ixheaacd_drc_offset,
420 WORD8 fac_q) {
421 FLOAT32 qfac;
422 WORD32 *window_long_prev, k, i, *window_short_prev_ptr;
423
424 WORD32 *p_in_ibuffer = usac_data->coef_fix[i_ch];
425 WORD32 *p_overlap_ibuffer = usac_data->overlap_data_ptr[i_ch];
426 WORD32 *p_out_ibuffer = usac_data->output_data_ptr[i_ch];
427 FLOAT32 *p_out_buffer = usac_data->time_sample_vector[i_ch];
428 WORD32 *scratch_mem = usac_data->scratch_buffer;
429 WORD32 n_long = usac_data->ccfl;
430 WORD32 td_frame_prev = usac_data->td_frame_prev[i_ch];
431 WORD32 fac_apply = usac_data->fac_data_present[i_ch];
432 WORD8 shiftp, output_q = 0, shift_olap = 14;
433 WORD32 max_shift;
434
435 WORD32 window_sequence = usac_data->window_sequence[i_ch];
436 WORD32 window_select_prev = usac_data->window_shape_prev[i_ch];
437 ia_usac_lpd_decoder_handle st = usac_data->str_tddec[i_ch];
438
439 WORD32 err_code = 0;
440
441 max_shift =
442 ixheaacd_calc_max_spectralline(p_in_ibuffer, ixheaacd_drc_offset->n_long);
443 ixheaacd_normalize(p_in_ibuffer, max_shift, ixheaacd_drc_offset->n_long);
444 shiftp = max_shift + 6;
445
446 ixheaacd_acelp_imdct(p_in_ibuffer, 2 * ixheaacd_drc_offset->n_long, &shiftp,
447 scratch_mem);
448
449 max_shift =
450 ixheaacd_calc_max_spectralline(p_in_ibuffer, ixheaacd_drc_offset->n_long);
451 ixheaacd_normalize(p_in_ibuffer, max_shift - 1, ixheaacd_drc_offset->n_long);
452 shiftp += max_shift - 1;
453
454 switch (window_sequence) {
455 case ONLY_LONG_SEQUENCE:
456 case LONG_START_SEQUENCE:
457 err_code = ixheaacd_calc_window(
458 &window_long_prev, ixheaacd_drc_offset->n_long, window_select_prev);
459 if (err_code == -1) return err_code;
460 output_q = ixheaacd_windowing_long1(
461 p_in_ibuffer + n_long / 2, p_overlap_ibuffer, window_long_prev,
462 window_long_prev + ixheaacd_drc_offset->n_long - 1, p_out_ibuffer,
463 ixheaacd_drc_offset->n_long, shiftp, shift_olap);
464 break;
465
466 case STOP_START_SEQUENCE:
467 case LONG_STOP_SEQUENCE:
468 err_code = ixheaacd_calc_window(&window_short_prev_ptr,
469 ixheaacd_drc_offset->n_trans_ls,
470 window_select_prev);
471 if (err_code == -1) return err_code;
472 if (fac_apply) {
473 output_q = ixheaacd_windowing_long2(
474 p_in_ibuffer + n_long / 2, window_short_prev_ptr, fac_idata,
475 p_overlap_ibuffer, p_out_ibuffer, ixheaacd_drc_offset, shiftp,
476 shift_olap, fac_q);
477 } else {
478 output_q = ixheaacd_windowing_long3(
479 p_in_ibuffer + n_long / 2, window_short_prev_ptr, p_overlap_ibuffer,
480 p_out_ibuffer,
481 window_short_prev_ptr + ixheaacd_drc_offset->n_trans_ls - 1,
482 ixheaacd_drc_offset, shiftp, shift_olap);
483 }
484 break;
485 }
486
487 for (i = 0; i < ixheaacd_drc_offset->n_long / 2; i++) {
488 p_overlap_ibuffer[ixheaacd_drc_offset->n_long / 2 + i] =
489 ixheaacd_negate32_sat(p_in_ibuffer[i]) >> (shiftp - shift_olap);
490 p_overlap_ibuffer[ixheaacd_drc_offset->n_long / 2 - i - 1] =
491 ixheaacd_negate32_sat(p_in_ibuffer[i]) >> (shiftp - shift_olap);
492 }
493
494 ixheaacd_scale_down_adj(p_out_ibuffer, p_out_ibuffer,
495 ixheaacd_drc_offset->n_long, output_q, 15);
496
497 if (td_frame_prev) {
498 qfac = 1.0f / (FLOAT32)(1 << 15);
499
500 for (k = 0; k < ixheaacd_drc_offset->n_long; k++) {
501 p_out_buffer[k] = ((FLOAT32)p_out_ibuffer[k]) * qfac;
502 }
503 err_code = ixheaacd_lpd_bpf_fix(usac_data, 0, p_out_buffer, st);
504 if (err_code != 0) return err_code;
505
506 for (k = 0; k < ixheaacd_drc_offset->n_long; k++) {
507 p_out_ibuffer[k] = (WORD32)(p_out_buffer[k] * (1 << 15));
508 }
509 }
510
511 return 0;
512 }
513
ixheaacd_fd_frm_dec(ia_usac_data_struct * usac_data,WORD32 i_ch)514 WORD32 ixheaacd_fd_frm_dec(ia_usac_data_struct *usac_data, WORD32 i_ch) {
515 WORD32 fac_idata[2 * FAC_LENGTH + 16];
516 offset_lengths ixheaacd_drc_offset;
517 WORD8 fac_q = 0;
518 WORD32 td_frame_prev = usac_data->td_frame_prev[i_ch];
519 WORD32 fac_apply = usac_data->fac_data_present[i_ch];
520 WORD32 window_sequence = usac_data->window_sequence[i_ch];
521 ixheaacd_drc_offset.n_long = usac_data->ccfl;
522 ixheaacd_drc_offset.n_short = ixheaacd_drc_offset.n_long >> 3;
523
524 memset(fac_idata, 0, sizeof(fac_idata));
525
526 if (td_frame_prev) {
527 if (window_sequence == EIGHT_SHORT_SEQUENCE) {
528 ixheaacd_drc_offset.lfac = ixheaacd_drc_offset.n_long >> 4;
529 } else {
530 ixheaacd_drc_offset.lfac = ixheaacd_drc_offset.n_long >> 3;
531 }
532 ixheaacd_drc_offset.n_flat_ls =
533 (ixheaacd_drc_offset.n_long - (ixheaacd_drc_offset.lfac) * 2) >> 1;
534
535 ixheaacd_drc_offset.n_trans_ls = (ixheaacd_drc_offset.lfac) << 1;
536 } else {
537 ixheaacd_drc_offset.lfac = FAC_LENGTH;
538 ixheaacd_drc_offset.n_flat_ls =
539 (ixheaacd_drc_offset.n_long - ixheaacd_drc_offset.n_short) >> 1;
540 ixheaacd_drc_offset.n_trans_ls = ixheaacd_drc_offset.n_short;
541 }
542
543 if (fac_apply)
544 fac_q = ixheaacd_cal_fac_data(usac_data, i_ch, ixheaacd_drc_offset.n_long,
545 ixheaacd_drc_offset.lfac, fac_idata);
546
547 if (window_sequence != EIGHT_SHORT_SEQUENCE)
548 ixheaacd_fd_imdct_long(usac_data, i_ch, fac_idata, &ixheaacd_drc_offset,
549 fac_q);
550
551 else
552 ixheaacd_fd_imdct_short(usac_data, i_ch, fac_idata, &ixheaacd_drc_offset,
553 fac_q);
554
555 return 0;
556 }
557