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gerrit-public.fairphone.software / platform / external / libxaac / acd9a332787841f498b2d85e8de21596f22c3230 / . / decoder / ixheaacd_esbr_fft.c
blob: 8a5b6168b1acf7b6b25d0ecd4ce2f5c4624cfdb8 [file] [log] [blame]
Ray Essick48f5fd92018-05-02 10:47:09 -0700[diff] [blame]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
21#include <stdio.h>
22#include <stdlib.h>
Ramesh Katurice7b4e92019-01-24 16:42:36 +0530[diff] [blame]23#include "ixheaacd_type_def.h"
Ray Essick48f5fd92018-05-02 10:47:09 -0700[diff] [blame]24#include "ixheaacd_constants.h"
Ramesh Katurice7b4e92019-01-24 16:42:36 +0530[diff] [blame]25#include "ixheaacd_basic_ops32.h"
Ray Essick48f5fd92018-05-02 10:47:09 -0700[diff] [blame]26
27#define PLATFORM_INLINE __inline
28
29#define DIG_REV(i, m, j) \
30 do { \
31 unsigned _ = (i); \
32 _ = ((_ & 0x33333333) << 2) | ((_ & ~0x33333333) >> 2); \
33 _ = ((_ & 0x0F0F0F0F) << 4) | ((_ & ~0x0F0F0F0F) >> 4); \
34 _ = ((_ & 0x00FF00FF) << 8) | ((_ & ~0x00FF00FF) >> 8); \
35 (j) = _ >> (m); \
36 } while (0)
37
Rajat Kumar93ade1f2019-03-20 08:57:35 +0530[diff] [blame]38extern const FLOAT32 ixheaacd_twiddle_table_fft_float[514];
Ray Essick48f5fd92018-05-02 10:47:09 -0700[diff] [blame]39const FLOAT32 ixheaacd_twidle_tbl_48[64];
40const FLOAT32 ixheaacd_twidle_tbl_24[32];
41
42void ixheaacd_real_synth_fft_p2(FLOAT32 *ptr_x, FLOAT32 *ptr_y,
43 WORD32 npoints) {
44 WORD32 i, j, k, n_stages, h2;
45 FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i;
46 WORD32 del, nodespacing, in_loop_cnt;
47 WORD32 not_power_4;
48 WORD32 dig_rev_shift;
49 const FLOAT32 *ptr_w;
50
51 dig_rev_shift = ixheaacd_norm32(npoints) + 1 - 16;
52 n_stages = 30 - ixheaacd_norm32(npoints);
53 not_power_4 = n_stages & 1;
54
55 n_stages = n_stages >> 1;
56
57 ptr_w = ixheaacd_twiddle_table_fft_float;
58
59 for (i = 0; i < npoints; i += 4) {
60 FLOAT32 *inp = ptr_x;
61
62 DIG_REV(i, dig_rev_shift, h2);
63 if (not_power_4) {
64 h2 += 1;
65 h2 &= ~1;
66 }
67 inp += (h2 >> 1);
68
69 x0r = *inp;
70 inp += (npoints >> 2);
71
72 x1r = *inp;
73 inp += (npoints >> 2);
74
75 x2r = *inp;
76 inp += (npoints >> 2);
77
78 x3r = *inp;
79
80 x0r = x0r + x2r;
81 x2r = x0r - (x2r * 2);
82 x1r = x1r + x3r;
83 x3r = x1r - (x3r * 2);
84 x0r = x0r + x1r;
85 x1r = x0r - (x1r * 2);
86
87 *ptr_y++ = x0r;
88 *ptr_y++ = 0;
89 *ptr_y++ = x2r;
90 *ptr_y++ = x3r;
91 *ptr_y++ = x1r;
92 *ptr_y++ = 0;
93 *ptr_y++ = x2r;
94 *ptr_y++ = -x3r;
95 }
96 ptr_y -= 2 * npoints;
97 del = 4;
98 nodespacing = 64;
99 in_loop_cnt = npoints >> 4;
100 for (i = n_stages - 1; i > 0; i--) {
101 const FLOAT32 *twiddles = ptr_w;
102 FLOAT32 *data = ptr_y;
103 FLOAT32 W1, W2, W3, W4, W5, W6;
104 WORD32 sec_loop_cnt;
105
106 for (k = in_loop_cnt; k != 0; k--) {
107 x0r = (*data);
108 x0i = (*(data + 1));
109 data += (del << 1);
110
111 x1r = (*data);
112 x1i = (*(data + 1));
113 data += (del << 1);
114
115 x2r = (*data);
116 x2i = (*(data + 1));
117 data += (del << 1);
118
119 x3r = (*data);
120 x3i = (*(data + 1));
121 data -= 3 * (del << 1);
122
123 x0r = x0r + x2r;
124 x0i = x0i + x2i;
125 x2r = x0r - (x2r * 2);
126 x2i = x0i - (x2i * 2);
127 x1r = x1r + x3r;
128 x1i = x1i + x3i;
129 x3r = x1r - (x3r * 2);
130 x3i = x1i - (x3i * 2);
131
132 x0r = x0r + x1r;
133 x0i = x0i + x1i;
134 x1r = x0r - (x1r * 2);
135 x1i = x0i - (x1i * 2);
136 x2r = x2r - x3i;
137 x2i = x2i + x3r;
138 x3i = x2r + (x3i * 2);
139 x3r = x2i - (x3r * 2);
140
141 *data = x0r;
142 *(data + 1) = x0i;
143 data += (del << 1);
144
145 *data = x2r;
146 *(data + 1) = x2i;
147 data += (del << 1);
148
149 *data = x1r;
150 *(data + 1) = x1i;
151 data += (del << 1);
152
153 *data = x3i;
154 *(data + 1) = x3r;
155 data += (del << 1);
156 }
157 data = ptr_y + 2;
158
159 sec_loop_cnt = (nodespacing * del);
160 sec_loop_cnt = (sec_loop_cnt / 4) + (sec_loop_cnt / 8) -
161 (sec_loop_cnt / 16) + (sec_loop_cnt / 32) -
162 (sec_loop_cnt / 64) + (sec_loop_cnt / 128) -
163 (sec_loop_cnt / 256);
164 j = nodespacing;
165
166 for (j = nodespacing; j <= sec_loop_cnt; j += nodespacing) {
167 W1 = *(twiddles + j);
168 W4 = *(twiddles + j + 257);
169 W2 = *(twiddles + (j << 1));
170 W5 = *(twiddles + (j << 1) + 257);
171 W3 = *(twiddles + j + (j << 1));
172 W6 = *(twiddles + j + (j << 1) + 257);
173
174 for (k = in_loop_cnt; k != 0; k--) {
175 FLOAT32 tmp;
176 FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i;
177
178 data += (del << 1);
179
180 x1r = *data;
181 x1i = *(data + 1);
182 data += (del << 1);
183
184 x2r = *data;
185 x2i = *(data + 1);
186 data += (del << 1);
187
188 x3r = *data;
189 x3i = *(data + 1);
190 data -= 3 * (del << 1);
191
192 tmp = (FLOAT32)(((FLOAT32)x1r * W1) + ((FLOAT32)x1i * W4));
193 x1i = (FLOAT32)(-((FLOAT32)x1r * W4) + (FLOAT32)x1i * W1);
194 x1r = tmp;
195
196 tmp = (FLOAT32)(((FLOAT32)x2r * W2) + ((FLOAT32)x2i * W5));
197 x2i = (FLOAT32)(-((FLOAT32)x2r * W5) + (FLOAT32)x2i * W2);
198 x2r = tmp;
199
200 tmp = (FLOAT32)(((FLOAT32)x3r * W3) + ((FLOAT32)x3i * W6));
201 x3i = (FLOAT32)(-((FLOAT32)x3r * W6) + (FLOAT32)x3i * W3);
202 x3r = tmp;
203
204 x0r = (*data);
205 x0i = (*(data + 1));
206
207 x0r = x0r + (x2r);
208 x0i = x0i + (x2i);
209 x2r = x0r - (x2r * 2);
210 x2i = x0i - (x2i * 2);
211 x1r = x1r + x3r;
212 x1i = x1i + x3i;
213 x3r = x1r - (x3r * 2);
214 x3i = x1i - (x3i * 2);
215
216 x0r = x0r + (x1r);
217 x0i = x0i + (x1i);
218 x1r = x0r - (x1r * 2);
219 x1i = x0i - (x1i * 2);
220 x2r = x2r - (x3i);
221 x2i = x2i + (x3r);
222 x3i = x2r + (x3i * 2);
223 x3r = x2i - (x3r * 2);
224
225 *data = x0r;
226 *(data + 1) = x0i;
227 data += (del << 1);
228
229 *data = x2r;
230 *(data + 1) = x2i;
231 data += (del << 1);
232
233 *data = x1r;
234 *(data + 1) = x1i;
235 data += (del << 1);
236
237 *data = x3i;
238 *(data + 1) = x3r;
239 data += (del << 1);
240 }
241 data -= 2 * npoints;
242 data += 2;
243 }
244 for (; j <= (nodespacing * del) >> 1; j += nodespacing) {
245 W1 = *(twiddles + j);
246 W4 = *(twiddles + j + 257);
247 W2 = *(twiddles + (j << 1));
248 W5 = *(twiddles + (j << 1) + 257);
249 W3 = *(twiddles + j + (j << 1) - 256);
250 W6 = *(twiddles + j + (j << 1) + 1);
251
252 for (k = in_loop_cnt; k != 0; k--) {
253 FLOAT32 tmp;
254 FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i;
255
256 data += (del << 1);
257
258 x1r = *data;
259 x1i = *(data + 1);
260 data += (del << 1);
261
262 x2r = *data;
263 x2i = *(data + 1);
264 data += (del << 1);
265
266 x3r = *data;
267 x3i = *(data + 1);
268 data -= 3 * (del << 1);
269
270 tmp = (FLOAT32)(((FLOAT32)x1r * W1) + ((FLOAT32)x1i * W4));
271 x1i = (FLOAT32)(-((FLOAT32)x1r * W4) + (FLOAT32)x1i * W1);
272 x1r = tmp;
273
274 tmp = (FLOAT32)(((FLOAT32)x2r * W2) + ((FLOAT32)x2i * W5));
275 x2i = (FLOAT32)(-((FLOAT32)x2r * W5) + (FLOAT32)x2i * W2);
276 x2r = tmp;
277
278 tmp = (FLOAT32)(((FLOAT32)x3r * W6) - ((FLOAT32)x3i * W3));
279 x3i = (FLOAT32)(((FLOAT32)x3r * W3) + ((FLOAT32)x3i * W6));
280 x3r = tmp;
281
282 x0r = (*data);
283 x0i = (*(data + 1));
284
285 x0r = x0r + (x2r);
286 x0i = x0i + (x2i);
287 x2r = x0r - (x2r * 2);
288 x2i = x0i - (x2i * 2);
289 x1r = x1r + x3r;
290 x1i = x1i + x3i;
291 x3r = x1r - (x3r * 2);
292 x3i = x1i - (x3i * 2);
293
294 x0r = x0r + (x1r);
295 x0i = x0i + (x1i);
296 x1r = x0r - (x1r * 2);
297 x1i = x0i - (x1i * 2);
298 x2r = x2r - (x3i);
299 x2i = x2i + (x3r);
300 x3i = x2r + (x3i * 2);
301 x3r = x2i - (x3r * 2);
302
303 *data = x0r;
304 *(data + 1) = x0i;
305 data += (del << 1);
306
307 *data = x2r;
308 *(data + 1) = x2i;
309 data += (del << 1);
310
311 *data = x1r;
312 *(data + 1) = x1i;
313 data += (del << 1);
314
315 *data = x3i;
316 *(data + 1) = x3r;
317 data += (del << 1);
318 }
319 data -= 2 * npoints;
320 data += 2;
321 }
322 for (; j <= sec_loop_cnt * 2; j += nodespacing) {
323 W1 = *(twiddles + j);
324 W4 = *(twiddles + j + 257);
325 W2 = *(twiddles + (j << 1) - 256);
326 W5 = *(twiddles + (j << 1) + 1);
327 W3 = *(twiddles + j + (j << 1) - 256);
328 W6 = *(twiddles + j + (j << 1) + 1);
329
330 for (k = in_loop_cnt; k != 0; k--) {
331 FLOAT32 tmp;
332 FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i;
333
334 data += (del << 1);
335
336 x1r = *data;
337 x1i = *(data + 1);
338 data += (del << 1);
339
340 x2r = *data;
341 x2i = *(data + 1);
342 data += (del << 1);
343
344 x3r = *data;
345 x3i = *(data + 1);
346 data -= 3 * (del << 1);
347
348 tmp = (FLOAT32)(((FLOAT32)x1r * W1) + ((FLOAT32)x1i * W4));
349 x1i = (FLOAT32)(-((FLOAT32)x1r * W4) + (FLOAT32)x1i * W1);
350 x1r = tmp;
351
352 tmp = (FLOAT32)(((FLOAT32)x2r * W5) - ((FLOAT32)x2i * W2));
353 x2i = (FLOAT32)(((FLOAT32)x2r * W2) + ((FLOAT32)x2i * W5));
354 x2r = tmp;
355
356 tmp = (FLOAT32)(((FLOAT32)x3r * W6) - ((FLOAT32)x3i * W3));
357 x3i = (FLOAT32)(((FLOAT32)x3r * W3) + ((FLOAT32)x3i * W6));
358 x3r = tmp;
359
360 x0r = (*data);
361 x0i = (*(data + 1));
362
363 x0r = x0r + (x2r);
364 x0i = x0i + (x2i);
365 x2r = x0r - (x2r * 2);
366 x2i = x0i - (x2i * 2);
367 x1r = x1r + x3r;
368 x1i = x1i + x3i;
369 x3r = x1r - (x3r * 2);
370 x3i = x1i - (x3i * 2);
371
372 x0r = x0r + (x1r);
373 x0i = x0i + (x1i);
374 x1r = x0r - (x1r * 2);
375 x1i = x0i - (x1i * 2);
376 x2r = x2r - (x3i);
377 x2i = x2i + (x3r);
378 x3i = x2r + (x3i * 2);
379 x3r = x2i - (x3r * 2);
380
381 *data = x0r;
382 *(data + 1) = x0i;
383 data += (del << 1);
384
385 *data = x2r;
386 *(data + 1) = x2i;
387 data += (del << 1);
388
389 *data = x1r;
390 *(data + 1) = x1i;
391 data += (del << 1);
392
393 *data = x3i;
394 *(data + 1) = x3r;
395 data += (del << 1);
396 }
397 data -= 2 * npoints;
398 data += 2;
399 }
400 for (; j < nodespacing * del; j += nodespacing) {
401 W1 = *(twiddles + j);
402 W4 = *(twiddles + j + 257);
403 W2 = *(twiddles + (j << 1) - 256);
404 W5 = *(twiddles + (j << 1) + 1);
405 W3 = *(twiddles + j + (j << 1) - 512);
406 W6 = *(twiddles + j + (j << 1) - 512 + 257);
407
408 for (k = in_loop_cnt; k != 0; k--) {
409 FLOAT32 tmp;
410 FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i;
411
412 data += (del << 1);
413
414 x1r = *data;
415 x1i = *(data + 1);
416 data += (del << 1);
417
418 x2r = *data;
419 x2i = *(data + 1);
420 data += (del << 1);
421
422 x3r = *data;
423 x3i = *(data + 1);
424 data -= 3 * (del << 1);
425
426 tmp = (FLOAT32)(((FLOAT32)x1r * W1) + ((FLOAT32)x1i * W4));
427 x1i = (FLOAT32)(-((FLOAT32)x1r * W4) + (FLOAT32)x1i * W1);
428 x1r = tmp;
429
430 tmp = (FLOAT32)(((FLOAT32)x2r * W5) - ((FLOAT32)x2i * W2));
431 x2i = (FLOAT32)(((FLOAT32)x2r * W2) + ((FLOAT32)x2i * W5));
432 x2r = tmp;
433
434 tmp = (FLOAT32)(-((FLOAT32)x3r * W3) - ((FLOAT32)x3i * W6));
435 x3i = (FLOAT32)(-((FLOAT32)x3r * W6) + (FLOAT32)x3i * W3);
436 x3r = tmp;
437
438 x0r = (*data);
439 x0i = (*(data + 1));
440
441 x0r = x0r + (x2r);
442 x0i = x0i + (x2i);
443 x2r = x0r - (x2r * 2);
444 x2i = x0i - (x2i * 2);
445 x1r = x1r + x3r;
446 x1i = x1i - x3i;
447 x3r = x1r - (x3r * 2);
448 x3i = x1i + (x3i * 2);
449
450 x0r = x0r + (x1r);
451 x0i = x0i + (x1i);
452 x1r = x0r - (x1r * 2);
453 x1i = x0i - (x1i * 2);
454 x2r = x2r - (x3i);
455 x2i = x2i + (x3r);
456 x3i = x2r + (x3i * 2);
457 x3r = x2i - (x3r * 2);
458
459 *data = x0r;
460 *(data + 1) = x0i;
461 data += (del << 1);
462
463 *data = x2r;
464 *(data + 1) = x2i;
465 data += (del << 1);
466
467 *data = x1r;
468 *(data + 1) = x1i;
469 data += (del << 1);
470
471 *data = x3i;
472 *(data + 1) = x3r;
473 data += (del << 1);
474 }
475 data -= 2 * npoints;
476 data += 2;
477 }
478 nodespacing >>= 2;
479 del <<= 2;
480 in_loop_cnt >>= 2;
481 }
482
483 if (not_power_4) {
484 const FLOAT32 *twiddles = ptr_w;
485 nodespacing <<= 1;
486
487 for (j = del / 2; j != 0; j--) {
488 FLOAT32 W1 = *twiddles;
489 FLOAT32 W4 = *(twiddles + 257);
490 FLOAT32 tmp;
491 twiddles += nodespacing;
492
493 x0r = *ptr_y;
494 x0i = *(ptr_y + 1);
495 ptr_y += (del << 1);
496
497 x1r = *ptr_y;
498 x1i = *(ptr_y + 1);
499
500 tmp = (FLOAT32)(((FLOAT32)x1r * W1) + ((FLOAT32)x1i * W4));
501 x1i = (FLOAT32)(-((FLOAT32)x1r * W4) + (FLOAT32)x1i * W1);
502 x1r = tmp;
503
504 *ptr_y = (x0r) - (x1r);
505 *(ptr_y + 1) = (x0i) - (x1i);
506 ptr_y -= (del << 1);
507
508 *ptr_y = (x0r) + (x1r);
509 *(ptr_y + 1) = (x0i) + (x1i);
510 ptr_y += 2;
511 }
512 twiddles = ptr_w;
513 for (j = del / 2; j != 0; j--) {
514 FLOAT32 W1 = *twiddles;
515 FLOAT32 W4 = *(twiddles + 257);
516 FLOAT32 tmp;
517 twiddles += nodespacing;
518
519 x0r = *ptr_y;
520 x0i = *(ptr_y + 1);
521 ptr_y += (del << 1);
522
523 x1r = *ptr_y;
524 x1i = *(ptr_y + 1);
525
526 tmp = (FLOAT32)(((FLOAT32)x1r * W4) - ((FLOAT32)x1i * W1));
527 x1i = (FLOAT32)(((FLOAT32)x1r * W1) + ((FLOAT32)x1i * W4));
528 x1r = tmp;
529
530 *ptr_y = (x0r) - (x1r);
531 *(ptr_y + 1) = (x0i) - (x1i);
532 ptr_y -= (del << 1);
533
534 *ptr_y = (x0r) + (x1r);
535 *(ptr_y + 1) = (x0i) + (x1i);
536 ptr_y += 2;
537 }
538 }
539}
540
541void ixheaacd_cmplx_anal_fft_p2(FLOAT32 *ptr_x, FLOAT32 *ptr_y,
542 WORD32 npoints) {
543 WORD32 i, j, k, n_stages, h2;
544 FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i;
545 WORD32 del, nodespacing, in_loop_cnt;
546 WORD32 not_power_4;
547 WORD32 dig_rev_shift;
548 const FLOAT32 *ptr_w;
549
550 dig_rev_shift = ixheaacd_norm32(npoints) + 1 - 16;
551 n_stages = 30 - ixheaacd_norm32(npoints);
552 not_power_4 = n_stages & 1;
553
554 n_stages = n_stages >> 1;
555
556 ptr_w = ixheaacd_twiddle_table_fft_float;
557
558 for (i = 0; i < npoints; i += 4) {
559 FLOAT32 *inp = ptr_x;
560
561 DIG_REV(i, dig_rev_shift, h2);
562 if (not_power_4) {
563 h2 += 1;
564 h2 &= ~1;
565 }
566 inp += (h2);
567
568 x0r = *inp;
569 x0i = *(inp + 1);
570 inp += (npoints >> 1);
571
572 x1r = *inp;
573 x1i = *(inp + 1);
574 inp += (npoints >> 1);
575
576 x2r = *inp;
577 x2i = *(inp + 1);
578 inp += (npoints >> 1);
579
580 x3r = *inp;
581 x3i = *(inp + 1);
582
583 x0r = x0r + x2r;
584 x0i = x0i + x2i;
585 x2r = x0r - (x2r * 2);
586 x2i = x0i - (x2i * 2);
587 x1r = x1r + x3r;
588 x1i = x1i + x3i;
589 x3r = x1r - (x3r * 2);
590 x3i = x1i - (x3i * 2);
591
592 x0r = x0r + x1r;
593 x0i = x0i + x1i;
594 x1r = x0r - (x1r * 2);
595 x1i = x0i - (x1i * 2);
596 x2r = x2r - x3i;
597 x2i = x2i + x3r;
598 x3i = x2r + (x3i * 2);
599 x3r = x2i - (x3r * 2);
600
601 *ptr_y++ = x0r;
602 *ptr_y++ = x0i;
603 *ptr_y++ = x2r;
604 *ptr_y++ = x2i;
605 *ptr_y++ = x1r;
606 *ptr_y++ = x1i;
607 *ptr_y++ = x3i;
608 *ptr_y++ = x3r;
609 }
610 ptr_y -= 2 * npoints;
611 del = 4;
612 nodespacing = 64;
613 in_loop_cnt = npoints >> 4;
614 for (i = n_stages - 1; i > 0; i--) {
615 const FLOAT32 *twiddles = ptr_w;
616 FLOAT32 *data = ptr_y;
617 FLOAT32 W1, W2, W3, W4, W5, W6;
618 WORD32 sec_loop_cnt;
619
620 for (k = in_loop_cnt; k != 0; k--) {
621 x0r = (*data);
622 x0i = (*(data + 1));
623 data += (del << 1);
624
625 x1r = (*data);
626 x1i = (*(data + 1));
627 data += (del << 1);
628
629 x2r = (*data);
630 x2i = (*(data + 1));
631 data += (del << 1);
632
633 x3r = (*data);
634 x3i = (*(data + 1));
635 data -= 3 * (del << 1);
636
637 x0r = x0r + x2r;
638 x0i = x0i + x2i;
639 x2r = x0r - (x2r * 2);
640 x2i = x0i - (x2i * 2);
641 x1r = x1r + x3r;
642 x1i = x1i + x3i;
643 x3r = x1r - (x3r * 2);
644 x3i = x1i - (x3i * 2);
645
646 x0r = x0r + x1r;
647 x0i = x0i + x1i;
648 x1r = x0r - (x1r * 2);
649 x1i = x0i - (x1i * 2);
650 x2r = x2r - x3i;
651 x2i = x2i + x3r;
652 x3i = x2r + (x3i * 2);
653 x3r = x2i - (x3r * 2);
654
655 *data = x0r;
656 *(data + 1) = x0i;
657 data += (del << 1);
658
659 *data = x2r;
660 *(data + 1) = x2i;
661 data += (del << 1);
662
663 *data = x1r;
664 *(data + 1) = x1i;
665 data += (del << 1);
666
667 *data = x3i;
668 *(data + 1) = x3r;
669 data += (del << 1);
670 }
671 data = ptr_y + 2;
672
673 sec_loop_cnt = (nodespacing * del);
674 sec_loop_cnt = (sec_loop_cnt / 4) + (sec_loop_cnt / 8) -
675 (sec_loop_cnt / 16) + (sec_loop_cnt / 32) -
676 (sec_loop_cnt / 64) + (sec_loop_cnt / 128) -
677 (sec_loop_cnt / 256);
678 j = nodespacing;
679
680 for (j = nodespacing; j <= sec_loop_cnt; j += nodespacing) {
681 W1 = *(twiddles + j);
682 W4 = *(twiddles + j + 257);
683 W2 = *(twiddles + (j << 1));
684 W5 = *(twiddles + (j << 1) + 257);
685 W3 = *(twiddles + j + (j << 1));
686 W6 = *(twiddles + j + (j << 1) + 257);
687
688 for (k = in_loop_cnt; k != 0; k--) {
689 FLOAT32 tmp;
690 FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i;
691
692 data += (del << 1);
693
694 x1r = *data;
695 x1i = *(data + 1);
696 data += (del << 1);
697
698 x2r = *data;
699 x2i = *(data + 1);
700 data += (del << 1);
701
702 x3r = *data;
703 x3i = *(data + 1);
704 data -= 3 * (del << 1);
705
706 tmp = (FLOAT32)(((FLOAT32)x1r * W1) + ((FLOAT32)x1i * W4));
707 x1i = (FLOAT32)(-((FLOAT32)x1r * W4) + (FLOAT32)x1i * W1);
708 x1r = tmp;
709
710 tmp = (FLOAT32)(((FLOAT32)x2r * W2) + ((FLOAT32)x2i * W5));
711 x2i = (FLOAT32)(-((FLOAT32)x2r * W5) + (FLOAT32)x2i * W2);
712 x2r = tmp;
713
714 tmp = (FLOAT32)(((FLOAT32)x3r * W3) + ((FLOAT32)x3i * W6));
715 x3i = (FLOAT32)(-((FLOAT32)x3r * W6) + (FLOAT32)x3i * W3);
716 x3r = tmp;
717
718 x0r = (*data);
719 x0i = (*(data + 1));
720
721 x0r = x0r + (x2r);
722 x0i = x0i + (x2i);
723 x2r = x0r - (x2r * 2);
724 x2i = x0i - (x2i * 2);
725 x1r = x1r + x3r;
726 x1i = x1i + x3i;
727 x3r = x1r - (x3r * 2);
728 x3i = x1i - (x3i * 2);
729
730 x0r = x0r + (x1r);
731 x0i = x0i + (x1i);
732 x1r = x0r - (x1r * 2);
733 x1i = x0i - (x1i * 2);
734 x2r = x2r - (x3i);
735 x2i = x2i + (x3r);
736 x3i = x2r + (x3i * 2);
737 x3r = x2i - (x3r * 2);
738
739 *data = x0r;
740 *(data + 1) = x0i;
741 data += (del << 1);
742
743 *data = x2r;
744 *(data + 1) = x2i;
745 data += (del << 1);
746
747 *data = x1r;
748 *(data + 1) = x1i;
749 data += (del << 1);
750
751 *data = x3i;
752 *(data + 1) = x3r;
753 data += (del << 1);
754 }
755 data -= 2 * npoints;
756 data += 2;
757 }
758 for (; j <= (nodespacing * del) >> 1; j += nodespacing) {
759 W1 = *(twiddles + j);
760 W4 = *(twiddles + j + 257);
761 W2 = *(twiddles + (j << 1));
762 W5 = *(twiddles + (j << 1) + 257);
763 W3 = *(twiddles + j + (j << 1) - 256);
764 W6 = *(twiddles + j + (j << 1) + 1);
765
766 for (k = in_loop_cnt; k != 0; k--) {
767 FLOAT32 tmp;
768 FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i;
769
770 data += (del << 1);
771
772 x1r = *data;
773 x1i = *(data + 1);
774 data += (del << 1);
775
776 x2r = *data;
777 x2i = *(data + 1);
778 data += (del << 1);
779
780 x3r = *data;
781 x3i = *(data + 1);
782 data -= 3 * (del << 1);
783
784 tmp = (FLOAT32)(((FLOAT32)x1r * W1) + ((FLOAT32)x1i * W4));
785 x1i = (FLOAT32)(-((FLOAT32)x1r * W4) + (FLOAT32)x1i * W1);
786 x1r = tmp;
787
788 tmp = (FLOAT32)(((FLOAT32)x2r * W2) + ((FLOAT32)x2i * W5));
789 x2i = (FLOAT32)(-((FLOAT32)x2r * W5) + (FLOAT32)x2i * W2);
790 x2r = tmp;
791
792 tmp = (FLOAT32)(((FLOAT32)x3r * W6) - ((FLOAT32)x3i * W3));
793 x3i = (FLOAT32)(((FLOAT32)x3r * W3) + ((FLOAT32)x3i * W6));
794 x3r = tmp;
795
796 x0r = (*data);
797 x0i = (*(data + 1));
798
799 x0r = x0r + (x2r);
800 x0i = x0i + (x2i);
801 x2r = x0r - (x2r * 2);
802 x2i = x0i - (x2i * 2);
803 x1r = x1r + x3r;
804 x1i = x1i + x3i;
805 x3r = x1r - (x3r * 2);
806 x3i = x1i - (x3i * 2);
807
808 x0r = x0r + (x1r);
809 x0i = x0i + (x1i);
810 x1r = x0r - (x1r * 2);
811 x1i = x0i - (x1i * 2);
812 x2r = x2r - (x3i);
813 x2i = x2i + (x3r);
814 x3i = x2r + (x3i * 2);
815 x3r = x2i - (x3r * 2);
816
817 *data = x0r;
818 *(data + 1) = x0i;
819 data += (del << 1);
820
821 *data = x2r;
822 *(data + 1) = x2i;
823 data += (del << 1);
824
825 *data = x1r;
826 *(data + 1) = x1i;
827 data += (del << 1);
828
829 *data = x3i;
830 *(data + 1) = x3r;
831 data += (del << 1);
832 }
833 data -= 2 * npoints;
834 data += 2;
835 }
836 for (; j <= sec_loop_cnt * 2; j += nodespacing) {
837 W1 = *(twiddles + j);
838 W4 = *(twiddles + j + 257);
839 W2 = *(twiddles + (j << 1) - 256);
840 W5 = *(twiddles + (j << 1) + 1);
841 W3 = *(twiddles + j + (j << 1) - 256);
842 W6 = *(twiddles + j + (j << 1) + 1);
843
844 for (k = in_loop_cnt; k != 0; k--) {
845 FLOAT32 tmp;
846 FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i;
847
848 data += (del << 1);
849
850 x1r = *data;
851 x1i = *(data + 1);
852 data += (del << 1);
853
854 x2r = *data;
855 x2i = *(data + 1);
856 data += (del << 1);
857
858 x3r = *data;
859 x3i = *(data + 1);
860 data -= 3 * (del << 1);
861
862 tmp = (FLOAT32)(((FLOAT32)x1r * W1) + ((FLOAT32)x1i * W4));
863 x1i = (FLOAT32)(-((FLOAT32)x1r * W4) + (FLOAT32)x1i * W1);
864 x1r = tmp;
865
866 tmp = (FLOAT32)(((FLOAT32)x2r * W5) - ((FLOAT32)x2i * W2));
867 x2i = (FLOAT32)(((FLOAT32)x2r * W2) + ((FLOAT32)x2i * W5));
868 x2r = tmp;
869
870 tmp = (FLOAT32)(((FLOAT32)x3r * W6) - ((FLOAT32)x3i * W3));
871 x3i = (FLOAT32)(((FLOAT32)x3r * W3) + ((FLOAT32)x3i * W6));
872 x3r = tmp;
873
874 x0r = (*data);
875 x0i = (*(data + 1));
876
877 x0r = x0r + (x2r);
878 x0i = x0i + (x2i);
879 x2r = x0r - (x2r * 2);
880 x2i = x0i - (x2i * 2);
881 x1r = x1r + x3r;
882 x1i = x1i + x3i;
883 x3r = x1r - (x3r * 2);
884 x3i = x1i - (x3i * 2);
885
886 x0r = x0r + (x1r);
887 x0i = x0i + (x1i);
888 x1r = x0r - (x1r * 2);
889 x1i = x0i - (x1i * 2);
890 x2r = x2r - (x3i);
891 x2i = x2i + (x3r);
892 x3i = x2r + (x3i * 2);
893 x3r = x2i - (x3r * 2);
894
895 *data = x0r;
896 *(data + 1) = x0i;
897 data += (del << 1);
898
899 *data = x2r;
900 *(data + 1) = x2i;
901 data += (del << 1);
902
903 *data = x1r;
904 *(data + 1) = x1i;
905 data += (del << 1);
906
907 *data = x3i;
908 *(data + 1) = x3r;
909 data += (del << 1);
910 }
911 data -= 2 * npoints;
912 data += 2;
913 }
914 for (; j < nodespacing * del; j += nodespacing) {
915 W1 = *(twiddles + j);
916 W4 = *(twiddles + j + 257);
917 W2 = *(twiddles + (j << 1) - 256);
918 W5 = *(twiddles + (j << 1) + 1);
919 W3 = *(twiddles + j + (j << 1) - 512);
920 W6 = *(twiddles + j + (j << 1) - 512 + 257);
921
922 for (k = in_loop_cnt; k != 0; k--) {
923 FLOAT32 tmp;
924 FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i;
925
926 data += (del << 1);
927
928 x1r = *data;
929 x1i = *(data + 1);
930 data += (del << 1);
931
932 x2r = *data;
933 x2i = *(data + 1);
934 data += (del << 1);
935
936 x3r = *data;
937 x3i = *(data + 1);
938 data -= 3 * (del << 1);
939
940 tmp = (FLOAT32)(((FLOAT32)x1r * W1) + ((FLOAT32)x1i * W4));
941 x1i = (FLOAT32)(-((FLOAT32)x1r * W4) + (FLOAT32)x1i * W1);
942 x1r = tmp;
943
944 tmp = (FLOAT32)(((FLOAT32)x2r * W5) - ((FLOAT32)x2i * W2));
945 x2i = (FLOAT32)(((FLOAT32)x2r * W2) + ((FLOAT32)x2i * W5));
946 x2r = tmp;
947
948 tmp = (FLOAT32)(-((FLOAT32)x3r * W3) - ((FLOAT32)x3i * W6));
949 x3i = (FLOAT32)(-((FLOAT32)x3r * W6) + (FLOAT32)x3i * W3);
950 x3r = tmp;
951
952 x0r = (*data);
953 x0i = (*(data + 1));
954
955 x0r = x0r + (x2r);
956 x0i = x0i + (x2i);
957 x2r = x0r - (x2r * 2);
958 x2i = x0i - (x2i * 2);
959 x1r = x1r + x3r;
960 x1i = x1i - x3i;
961 x3r = x1r - (x3r * 2);
962 x3i = x1i + (x3i * 2);
963
964 x0r = x0r + (x1r);
965 x0i = x0i + (x1i);
966 x1r = x0r - (x1r * 2);
967 x1i = x0i - (x1i * 2);
968 x2r = x2r - (x3i);
969 x2i = x2i + (x3r);
970 x3i = x2r + (x3i * 2);
971 x3r = x2i - (x3r * 2);
972
973 *data = x0r;
974 *(data + 1) = x0i;
975 data += (del << 1);
976
977 *data = x2r;
978 *(data + 1) = x2i;
979 data += (del << 1);
980
981 *data = x1r;
982 *(data + 1) = x1i;
983 data += (del << 1);
984
985 *data = x3i;
986 *(data + 1) = x3r;
987 data += (del << 1);
988 }
989 data -= 2 * npoints;
990 data += 2;
991 }
992 nodespacing >>= 2;
993 del <<= 2;
994 in_loop_cnt >>= 2;
995 }
996
997 if (not_power_4) {
998 const FLOAT32 *twiddles = ptr_w;
999 nodespacing <<= 1;
1000
1001 for (j = del / 2; j != 0; j--) {
1002 FLOAT32 W1 = *twiddles;
1003 FLOAT32 W4 = *(twiddles + 257);
1004 FLOAT32 tmp;
1005 twiddles += nodespacing;
1006
1007 x0r = *ptr_y;
1008 x0i = *(ptr_y + 1);
1009 ptr_y += (del << 1);
1010
1011 x1r = *ptr_y;
1012 x1i = *(ptr_y + 1);
1013
1014 tmp = (FLOAT32)(((FLOAT32)x1r * W1) + ((FLOAT32)x1i * W4));
1015 x1i = (FLOAT32)(-((FLOAT32)x1r * W4) + (FLOAT32)x1i * W1);
1016 x1r = tmp;
1017
1018 *ptr_y = (x0r) - (x1r);
1019 *(ptr_y + 1) = (x0i) - (x1i);
1020 ptr_y -= (del << 1);
1021
1022 *ptr_y = (x0r) + (x1r);
1023 *(ptr_y + 1) = (x0i) + (x1i);
1024 ptr_y += 2;
1025 }
1026 twiddles = ptr_w;
1027 for (j = del / 2; j != 0; j--) {
1028 FLOAT32 W1 = *twiddles;
1029 FLOAT32 W4 = *(twiddles + 257);
1030 FLOAT32 tmp;
1031 twiddles += nodespacing;
1032
1033 x0r = *ptr_y;
1034 x0i = *(ptr_y + 1);
1035 ptr_y += (del << 1);
1036
1037 x1r = *ptr_y;
1038 x1i = *(ptr_y + 1);
1039
1040 tmp = (FLOAT32)(((FLOAT32)x1r * W4) - ((FLOAT32)x1i * W1));
1041 x1i = (FLOAT32)(((FLOAT32)x1r * W1) + ((FLOAT32)x1i * W4));
1042 x1r = tmp;
1043
1044 *ptr_y = (x0r) - (x1r);
1045 *(ptr_y + 1) = (x0i) - (x1i);
1046 ptr_y -= (del << 1);
1047
1048 *ptr_y = (x0r) + (x1r);
1049 *(ptr_y + 1) = (x0i) + (x1i);
1050 ptr_y += 2;
1051 }
1052 }
1053}
1054
1055static PLATFORM_INLINE void ixheaacd_aac_ld_dec_fft_3_float(FLOAT32 *inp,
1056 FLOAT32 *op) {
1057 FLOAT32 add_r, sub_r;
1058 FLOAT32 add_i, sub_i;
1059 FLOAT32 temp_real, temp_imag, temp;
1060
1061 FLOAT32 p1, p2, p3, p4;
1062
1063 FLOAT32 sinmu;
1064 sinmu = -0.866025403784439f;
1065
1066 temp_real = inp[0] + inp[2];
1067 temp_imag = inp[1] + inp[3];
1068
1069 add_r = inp[2] + inp[4];
1070 add_i = inp[3] + inp[5];
1071
1072 sub_r = inp[2] - inp[4];
1073 sub_i = inp[3] - inp[5];
1074
1075 p1 = add_r / 2.0f;
1076 p4 = add_i / 2.0f;
1077 p2 = sub_i * sinmu;
1078 p3 = sub_r * sinmu;
1079
1080 temp = inp[0] - p1;
1081
1082 op[0] = temp_real + inp[4];
1083 op[1] = temp_imag + inp[5];
1084 op[2] = temp + p2;
1085 op[3] = (inp[1] - p3) - p4;
1086 op[4] = temp - p2;
1087 op[5] = (inp[1] + p3) - p4;
1088
1089 return;
1090}
1091
1092void ixheaacd_real_synth_fft_p3(FLOAT32 *x_in, FLOAT32 *x_out, WORD32 npoints) {
1093 WORD32 i, j;
1094 FLOAT32 x_3[8];
1095 FLOAT32 y_3[16];
1096 FLOAT32 y[48];
1097 FLOAT32 x[48];
1098 FLOAT32 *ptr_y = y;
1099 FLOAT32 *y_p3 = y;
1100 FLOAT32 *x_p3 = x;
1101
1102 for (i = 0; i < 3; i += 1) {
1103 for (j = 0; j < (npoints / 3); j++) {
1104 x_3[j] = x_in[3 * j + i];
1105 }
1106
1107 ixheaacd_real_synth_fft_p2(x_3, y_3, 8);
1108
1109 for (j = 0; j < 16; j += 2) {
1110 x[3 * j + 2 * i] = y_3[j];
1111 x[3 * j + 2 * i + 1] = y_3[j + 1];
1112 }
1113 }
1114
1115 {
1116 FLOAT32 *wr;
1117 FLOAT32 tmp;
1118 FLOAT32 *x_tw = x;
1119 wr = (FLOAT32 *)ixheaacd_twidle_tbl_24;
1120 x_tw += 2;
1121
1122 for (i = 0; i < (npoints / 3); i++) {
1123 tmp = ((*x_tw) * (*wr) + (*(x_tw + 1)) * (*(wr + 1)));
1124 *(x_tw + 1) = (-(*x_tw) * (*(wr + 1)) + (*(x_tw + 1)) * (*wr));
1125 *x_tw = tmp;
1126
1127 wr += 2;
1128 x_tw += 2;
1129
1130 tmp = ((*x_tw) * (*wr) + (*(x_tw + 1)) * (*(wr + 1)));
1131 *(x_tw + 1) = (-(*x_tw) * (*(wr + 1)) + (*(x_tw + 1)) * (*wr));
1132 *x_tw = tmp;
1133
1134 wr += 2;
1135 x_tw += 4;
1136 }
1137 }
1138
1139 for (i = 0; i < (npoints / 3); i++) {
1140 ixheaacd_aac_ld_dec_fft_3_float(x_p3, y_p3);
1141
1142 x_p3 = x_p3 + 6;
1143 y_p3 = y_p3 + 6;
1144 }
1145
1146 for (i = 0; i < 16; i += 2) {
1147 x_out[i] = *ptr_y++;
1148 x_out[i + 1] = *ptr_y++;
1149 x_out[16 + i] = *ptr_y++;
1150 x_out[16 + i + 1] = *ptr_y++;
1151 x_out[32 + i] = *ptr_y++;
1152 x_out[32 + i + 1] = *ptr_y++;
1153 }
1154}
1155
1156void ixheaacd_cmplx_anal_fft_p3(FLOAT32 *x_in, FLOAT32 *x_out, WORD32 npoints) {
1157 WORD32 i, j;
1158 FLOAT32 x_3[32];
1159 FLOAT32 y_3[32];
1160 FLOAT32 y[96];
1161 FLOAT32 *ptr_x = x_in;
1162 FLOAT32 *ptr_y = y;
1163 FLOAT32 *y_p3 = y;
1164
1165 for (i = 0; i < 6; i += 2) {
1166 for (j = 0; j < 32; j += 2) {
1167 x_3[j] = x_in[3 * j + i];
1168 x_3[j + 1] = x_in[3 * j + i + 1];
1169 }
1170
1171 ixheaacd_cmplx_anal_fft_p2(x_3, y_3, 16);
1172
1173 for (j = 0; j < 32; j += 2) {
1174 x_in[3 * j + i] = y_3[j];
1175 x_in[3 * j + i + 1] = y_3[j + 1];
1176 }
1177 }
1178
1179 {
1180 FLOAT32 *wr;
1181 FLOAT32 tmp;
1182 wr = (FLOAT32 *)ixheaacd_twidle_tbl_48;
1183 x_in += 2;
1184
1185 for (i = 0; i < (npoints / 3); i++) {
1186 tmp = ((*x_in) * (*wr) + (*(x_in + 1)) * (*(wr + 1)));
1187 *(x_in + 1) = (-(*x_in) * (*(wr + 1)) + (*(x_in + 1)) * (*wr));
1188 *x_in = tmp;
1189
1190 wr += 2;
1191 x_in += 2;
1192
1193 tmp = ((*x_in) * (*wr) + (*(x_in + 1)) * (*(wr + 1)));
1194 *(x_in + 1) = (-(*x_in) * (*(wr + 1)) + (*(x_in + 1)) * (*wr));
1195 *x_in = tmp;
1196
1197 wr += 2;
1198 x_in += 4;
1199 }
1200 }
1201
1202 for (i = 0; i < (npoints / 3); i++) {
1203 ixheaacd_aac_ld_dec_fft_3_float(ptr_x, ptr_y);
1204
1205 ptr_x = ptr_x + 6;
1206 ptr_y = ptr_y + 6;
1207 }
1208
1209 for (i = 0; i < 32; i += 2) {
1210 x_out[i] = *y_p3++;
1211 x_out[i + 1] = *y_p3++;
1212 x_out[32 + i] = *y_p3++;
1213 x_out[32 + i + 1] = *y_p3++;
1214 x_out[64 + i] = *y_p3++;
1215 x_out[64 + i + 1] = *y_p3++;
1216 }
1217}