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1/*
2 * Copyright (c) 2013
3 * MIPS Technologies, Inc., California.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * AAC Spectral Band Replication decoding functions (fixed-point)
30 * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl )
31 * Copyright (c) 2009-2010 Alex Converse <alex.converse@gmail.com>
32 *
33 * This file is part of FFmpeg.
34 *
35 * FFmpeg is free software; you can redistribute it and/or
36 * modify it under the terms of the GNU Lesser General Public
37 * License as published by the Free Software Foundation; either
38 * version 2.1 of the License, or (at your option) any later version.
39 *
40 * FFmpeg is distributed in the hope that it will be useful,
41 * but WITHOUT ANY WARRANTY; without even the implied warranty of
42 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
43 * Lesser General Public License for more details.
44 *
45 * You should have received a copy of the GNU Lesser General Public
46 * License along with FFmpeg; if not, write to the Free Software
47 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
48 */
49
50/**
51 * @file
52 * AAC Spectral Band Replication decoding functions (fixed-point)
53 * Note: Rounding-to-nearest used unless otherwise stated
54 * @author Robert Swain ( rob opendot cl )
55 * @author Stanislav Ocovaj ( stanislav.ocovaj imgtec com )
56 */
57#define USE_FIXED 1
58
59#include "aac.h"
60#include "sbr.h"
61#include "aacsbr.h"
62#include "aacsbrdata.h"
63#include "aacsbr_fixed_tablegen.h"
64#include "fft.h"
65#include "aacps.h"
66#include "sbrdsp.h"
67#include "libavutil/internal.h"
68#include "libavutil/libm.h"
69#include "libavutil/avassert.h"
70
71#include <stdint.h>
72#include <float.h>
73#include <math.h>
74
75static VLC vlc_sbr[10];
76static void aacsbr_func_ptr_init(AACSBRContext *c);
77static const int CONST_LN2 = Q31(0.6931471806/256); // ln(2)/256
78static const int CONST_RECIP_LN2 = Q31(0.7213475204); // 0.5/ln(2)
79static const int CONST_076923 = Q31(0.76923076923076923077f);
80
81static const int fixed_log_table[10] =
82{
83 Q31(1.0/2), Q31(1.0/3), Q31(1.0/4), Q31(1.0/5), Q31(1.0/6),
84 Q31(1.0/7), Q31(1.0/8), Q31(1.0/9), Q31(1.0/10), Q31(1.0/11)
85};
86
87static int fixed_log(int x)
88{
89 int i, ret, xpow, tmp;
90
91 ret = x;
92 xpow = x;
93 for (i=0; i<10; i+=2){
94 xpow = (int)(((int64_t)xpow * x + 0x40000000) >> 31);
95 tmp = (int)(((int64_t)xpow * fixed_log_table[i] + 0x40000000) >> 31);
96 ret -= tmp;
97
98 xpow = (int)(((int64_t)xpow * x + 0x40000000) >> 31);
99 tmp = (int)(((int64_t)xpow * fixed_log_table[i+1] + 0x40000000) >> 31);
100 ret += tmp;
101 }
102
103 return ret;
104}
105
106static const int fixed_exp_table[7] =
107{
108 Q31(1.0/2), Q31(1.0/6), Q31(1.0/24), Q31(1.0/120),
109 Q31(1.0/720), Q31(1.0/5040), Q31(1.0/40320)
110};
111
112static int fixed_exp(int x)
113{
114 int i, ret, xpow, tmp;
115
116 ret = 0x800000 + x;
117 xpow = x;
118 for (i=0; i<7; i++){
119 xpow = (int)(((int64_t)xpow * x + 0x400000) >> 23);
120 tmp = (int)(((int64_t)xpow * fixed_exp_table[i] + 0x40000000) >> 31);
121 ret += tmp;
122 }
123
124 return ret;
125}
126
127static void make_bands(int16_t* bands, int start, int stop, int num_bands)
128{
129 int k, previous, present;
130 int base, prod, nz = 0;
131
132 base = (stop << 23) / start;
133 while (base < 0x40000000){
134 base <<= 1;
135 nz++;
136 }
137 base = fixed_log(base - 0x80000000);
138 base = (((base + 0x80) >> 8) + (8-nz)*CONST_LN2) / num_bands;
139 base = fixed_exp(base);
140
141 previous = start;
142 prod = start << 23;
143
144 for (k = 0; k < num_bands-1; k++) {
145 prod = (int)(((int64_t)prod * base + 0x400000) >> 23);
146 present = (prod + 0x400000) >> 23;
147 bands[k] = present - previous;
148 previous = present;
149 }
150 bands[num_bands-1] = stop - previous;
151}
152
153/// Dequantization and stereo decoding (14496-3 sp04 p203)
154static void sbr_dequant(SpectralBandReplication *sbr, int id_aac)
155{
156 int k, e;
157 int ch;
158
159 if (id_aac == TYPE_CPE && sbr->bs_coupling) {
160 int alpha = sbr->data[0].bs_amp_res ? 2 : 1;
161 int pan_offset = sbr->data[0].bs_amp_res ? 12 : 24;
162 for (e = 1; e <= sbr->data[0].bs_num_env; e++) {
163 for (k = 0; k < sbr->n[sbr->data[0].bs_freq_res[e]]; k++) {
164 SoftFloat temp1, temp2, fac;
165
166 temp1.exp = sbr->data[0].env_facs_q[e][k] * alpha + 14;
167 if (temp1.exp & 1)
168 temp1.mant = 759250125;
169 else
170 temp1.mant = 0x20000000;
171 temp1.exp = (temp1.exp >> 1) + 1;
172 if (temp1.exp > 66) { // temp1 > 1E20
173 av_log(NULL, AV_LOG_ERROR, "envelope scalefactor overflow in dequant\n");
174 temp1 = FLOAT_1;
175 }
176
177 temp2.exp = (pan_offset - sbr->data[1].env_facs_q[e][k]) * alpha;
178 if (temp2.exp & 1)
179 temp2.mant = 759250125;
180 else
181 temp2.mant = 0x20000000;
182 temp2.exp = (temp2.exp >> 1) + 1;
183 fac = av_div_sf(temp1, av_add_sf(FLOAT_1, temp2));
184 sbr->data[0].env_facs[e][k] = fac;
185 sbr->data[1].env_facs[e][k] = av_mul_sf(fac, temp2);
186 }
187 }
188 for (e = 1; e <= sbr->data[0].bs_num_noise; e++) {
189 for (k = 0; k < sbr->n_q; k++) {
190 SoftFloat temp1, temp2, fac;
191
192 temp1.exp = NOISE_FLOOR_OFFSET - \
193 sbr->data[0].noise_facs_q[e][k] + 2;
194 temp1.mant = 0x20000000;
195 av_assert0(temp1.exp <= 66);
196 temp2.exp = 12 - sbr->data[1].noise_facs_q[e][k] + 1;
197 temp2.mant = 0x20000000;
198 fac = av_div_sf(temp1, av_add_sf(FLOAT_1, temp2));
199 sbr->data[0].noise_facs[e][k] = fac;
200 sbr->data[1].noise_facs[e][k] = av_mul_sf(fac, temp2);
201 }
202 }
203 } else { // SCE or one non-coupled CPE
204 for (ch = 0; ch < (id_aac == TYPE_CPE) + 1; ch++) {
205 int alpha = sbr->data[ch].bs_amp_res ? 2 : 1;
206 for (e = 1; e <= sbr->data[ch].bs_num_env; e++)
207 for (k = 0; k < sbr->n[sbr->data[ch].bs_freq_res[e]]; k++){
208 SoftFloat temp1;
209
210 temp1.exp = alpha * sbr->data[ch].env_facs_q[e][k] + 12;
211 if (temp1.exp & 1)
212 temp1.mant = 759250125;
213 else
214 temp1.mant = 0x20000000;
215 temp1.exp = (temp1.exp >> 1) + 1;
216 if (temp1.exp > 66) { // temp1 > 1E20
217 av_log(NULL, AV_LOG_ERROR, "envelope scalefactor overflow in dequant\n");
218 temp1 = FLOAT_1;
219 }
220 sbr->data[ch].env_facs[e][k] = temp1;
221 }
222 for (e = 1; e <= sbr->data[ch].bs_num_noise; e++)
223 for (k = 0; k < sbr->n_q; k++){
224 sbr->data[ch].noise_facs[e][k].exp = NOISE_FLOOR_OFFSET - \
225 sbr->data[ch].noise_facs_q[e][k] + 1;
226 sbr->data[ch].noise_facs[e][k].mant = 0x20000000;
227 }
228 }
229 }
230}
231
232/** High Frequency Generation (14496-3 sp04 p214+) and Inverse Filtering
233 * (14496-3 sp04 p214)
234 * Warning: This routine does not seem numerically stable.
235 */
236static void sbr_hf_inverse_filter(SBRDSPContext *dsp,
237 int (*alpha0)[2], int (*alpha1)[2],
238 const int X_low[32][40][2], int k0)
239{
240 int k;
241 int shift, round;
242
243 for (k = 0; k < k0; k++) {
244 SoftFloat phi[3][2][2];
245 SoftFloat a00, a01, a10, a11;
246 SoftFloat dk;
247
248 dsp->autocorrelate(X_low[k], phi);
249
250 dk = av_sub_sf(av_mul_sf(phi[2][1][0], phi[1][0][0]),
251 av_mul_sf(av_add_sf(av_mul_sf(phi[1][1][0], phi[1][1][0]),
252 av_mul_sf(phi[1][1][1], phi[1][1][1])), FLOAT_0999999));
253
254 if (!dk.mant) {
255 a10 = FLOAT_0;
256 a11 = FLOAT_0;
257 } else {
258 SoftFloat temp_real, temp_im;
259 temp_real = av_sub_sf(av_sub_sf(av_mul_sf(phi[0][0][0], phi[1][1][0]),
260 av_mul_sf(phi[0][0][1], phi[1][1][1])),
261 av_mul_sf(phi[0][1][0], phi[1][0][0]));
262 temp_im = av_sub_sf(av_add_sf(av_mul_sf(phi[0][0][0], phi[1][1][1]),
263 av_mul_sf(phi[0][0][1], phi[1][1][0])),
264 av_mul_sf(phi[0][1][1], phi[1][0][0]));
265
266 a10 = av_div_sf(temp_real, dk);
267 a11 = av_div_sf(temp_im, dk);
268 }
269
270 if (!phi[1][0][0].mant) {
271 a00 = FLOAT_0;
272 a01 = FLOAT_0;
273 } else {
274 SoftFloat temp_real, temp_im;
275 temp_real = av_add_sf(phi[0][0][0],
276 av_add_sf(av_mul_sf(a10, phi[1][1][0]),
277 av_mul_sf(a11, phi[1][1][1])));
278 temp_im = av_add_sf(phi[0][0][1],
279 av_sub_sf(av_mul_sf(a11, phi[1][1][0]),
280 av_mul_sf(a10, phi[1][1][1])));
281
282 temp_real.mant = -temp_real.mant;
283 temp_im.mant = -temp_im.mant;
284 a00 = av_div_sf(temp_real, phi[1][0][0]);
285 a01 = av_div_sf(temp_im, phi[1][0][0]);
286 }
287
288 shift = a00.exp;
289 if (shift >= 3)
290 alpha0[k][0] = 0x7fffffff;
291 else {
292 a00.mant <<= 1;
293 shift = 2-shift;
294 if (shift == 0)
295 alpha0[k][0] = a00.mant;
296 else {
297 round = 1 << (shift-1);
298 alpha0[k][0] = (a00.mant + round) >> shift;
299 }
300 }
301
302 shift = a01.exp;
303 if (shift >= 3)
304 alpha0[k][1] = 0x7fffffff;
305 else {
306 a01.mant <<= 1;
307 shift = 2-shift;
308 if (shift == 0)
309 alpha0[k][1] = a01.mant;
310 else {
311 round = 1 << (shift-1);
312 alpha0[k][1] = (a01.mant + round) >> shift;
313 }
314 }
315 shift = a10.exp;
316 if (shift >= 3)
317 alpha1[k][0] = 0x7fffffff;
318 else {
319 a10.mant <<= 1;
320 shift = 2-shift;
321 if (shift == 0)
322 alpha1[k][0] = a10.mant;
323 else {
324 round = 1 << (shift-1);
325 alpha1[k][0] = (a10.mant + round) >> shift;
326 }
327 }
328
329 shift = a11.exp;
330 if (shift >= 3)
331 alpha1[k][1] = 0x7fffffff;
332 else {
333 a11.mant <<= 1;
334 shift = 2-shift;
335 if (shift == 0)
336 alpha1[k][1] = a11.mant;
337 else {
338 round = 1 << (shift-1);
339 alpha1[k][1] = (a11.mant + round) >> shift;
340 }
341 }
342
343 shift = (int)(((int64_t)(alpha1[k][0]>>1) * (alpha1[k][0]>>1) + \
344 (int64_t)(alpha1[k][1]>>1) * (alpha1[k][1]>>1) + \
345 0x40000000) >> 31);
346 if (shift >= 0x20000000){
347 alpha1[k][0] = 0;
348 alpha1[k][1] = 0;
349 alpha0[k][0] = 0;
350 alpha0[k][1] = 0;
351 }
352
353 shift = (int)(((int64_t)(alpha0[k][0]>>1) * (alpha0[k][0]>>1) + \
354 (int64_t)(alpha0[k][1]>>1) * (alpha0[k][1]>>1) + \
355 0x40000000) >> 31);
356 if (shift >= 0x20000000){
357 alpha1[k][0] = 0;
358 alpha1[k][1] = 0;
359 alpha0[k][0] = 0;
360 alpha0[k][1] = 0;
361 }
362 }
363}
364
365/// Chirp Factors (14496-3 sp04 p214)
366static void sbr_chirp(SpectralBandReplication *sbr, SBRData *ch_data)
367{
368 int i;
369 int new_bw;
370 static const int bw_tab[] = { 0, 1610612736, 1932735283, 2104533975 };
371 int64_t accu;
372
373 for (i = 0; i < sbr->n_q; i++) {
374 if (ch_data->bs_invf_mode[0][i] + ch_data->bs_invf_mode[1][i] == 1)
375 new_bw = 1288490189;
376 else
377 new_bw = bw_tab[ch_data->bs_invf_mode[0][i]];
378
379 if (new_bw < ch_data->bw_array[i]){
380 accu = (int64_t)new_bw * 1610612736;
381 accu += (int64_t)ch_data->bw_array[i] * 0x20000000;
382 new_bw = (int)((accu + 0x40000000) >> 31);
383 } else {
384 accu = (int64_t)new_bw * 1946157056;
385 accu += (int64_t)ch_data->bw_array[i] * 201326592;
386 new_bw = (int)((accu + 0x40000000) >> 31);
387 }
388 ch_data->bw_array[i] = new_bw < 0x2000000 ? 0 : new_bw;
389 }
390}
391
392/**
393 * Calculation of levels of additional HF signal components (14496-3 sp04 p219)
394 * and Calculation of gain (14496-3 sp04 p219)
395 */
396static void sbr_gain_calc(AACContext *ac, SpectralBandReplication *sbr,
397 SBRData *ch_data, const int e_a[2])
398{
399 int e, k, m;
400 // max gain limits : -3dB, 0dB, 3dB, inf dB (limiter off)
401 static const SoftFloat limgain[4] = { { 760155524, 0 }, { 0x20000000, 1 },
402 { 758351638, 1 }, { 625000000, 34 } };
403
404 for (e = 0; e < ch_data->bs_num_env; e++) {
405 int delta = !((e == e_a[1]) || (e == e_a[0]));
406 for (k = 0; k < sbr->n_lim; k++) {
407 SoftFloat gain_boost, gain_max;
408 SoftFloat sum[2];
409 sum[0] = sum[1] = FLOAT_0;
410 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
411 const SoftFloat temp = av_div_sf(sbr->e_origmapped[e][m],
412 av_add_sf(FLOAT_1, sbr->q_mapped[e][m]));
413 sbr->q_m[e][m] = av_sqrt_sf(av_mul_sf(temp, sbr->q_mapped[e][m]));
414 sbr->s_m[e][m] = av_sqrt_sf(av_mul_sf(temp, av_int2sf(ch_data->s_indexmapped[e + 1][m], 0)));
415 if (!sbr->s_mapped[e][m]) {
416 if (delta) {
417 sbr->gain[e][m] = av_sqrt_sf(av_div_sf(sbr->e_origmapped[e][m],
418 av_mul_sf(av_add_sf(FLOAT_1, sbr->e_curr[e][m]),
419 av_add_sf(FLOAT_1, sbr->q_mapped[e][m]))));
420 } else {
421 sbr->gain[e][m] = av_sqrt_sf(av_div_sf(sbr->e_origmapped[e][m],
422 av_add_sf(FLOAT_1, sbr->e_curr[e][m])));
423 }
424 } else {
425 sbr->gain[e][m] = av_sqrt_sf(
426 av_div_sf(
427 av_mul_sf(sbr->e_origmapped[e][m], sbr->q_mapped[e][m]),
428 av_mul_sf(
429 av_add_sf(FLOAT_1, sbr->e_curr[e][m]),
430 av_add_sf(FLOAT_1, sbr->q_mapped[e][m]))));
431 }
432 }
433 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
434 sum[0] = av_add_sf(sum[0], sbr->e_origmapped[e][m]);
435 sum[1] = av_add_sf(sum[1], sbr->e_curr[e][m]);
436 }
437 gain_max = av_mul_sf(limgain[sbr->bs_limiter_gains],
438 av_sqrt_sf(
439 av_div_sf(
440 av_add_sf(FLOAT_EPSILON, sum[0]),
441 av_add_sf(FLOAT_EPSILON, sum[1]))));
442 if (av_gt_sf(gain_max, FLOAT_100000))
443 gain_max = FLOAT_100000;
444 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
445 SoftFloat q_m_max = av_div_sf(
446 av_mul_sf(sbr->q_m[e][m], gain_max),
447 sbr->gain[e][m]);
448 if (av_gt_sf(sbr->q_m[e][m], q_m_max))
449 sbr->q_m[e][m] = q_m_max;
450 if (av_gt_sf(sbr->gain[e][m], gain_max))
451 sbr->gain[e][m] = gain_max;
452 }
453 sum[0] = sum[1] = FLOAT_0;
454 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
455 sum[0] = av_add_sf(sum[0], sbr->e_origmapped[e][m]);
456 sum[1] = av_add_sf(sum[1],
457 av_mul_sf(
458 av_mul_sf(sbr->e_curr[e][m],
459 sbr->gain[e][m]),
460 sbr->gain[e][m]));
461 sum[1] = av_add_sf(sum[1],
462 av_mul_sf(sbr->s_m[e][m], sbr->s_m[e][m]));
463 if (delta && !sbr->s_m[e][m].mant)
464 sum[1] = av_add_sf(sum[1],
465 av_mul_sf(sbr->q_m[e][m], sbr->q_m[e][m]));
466 }
467 gain_boost = av_sqrt_sf(
468 av_div_sf(
469 av_add_sf(FLOAT_EPSILON, sum[0]),
470 av_add_sf(FLOAT_EPSILON, sum[1])));
471 if (av_gt_sf(gain_boost, FLOAT_1584893192))
472 gain_boost = FLOAT_1584893192;
473
474 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
475 sbr->gain[e][m] = av_mul_sf(sbr->gain[e][m], gain_boost);
476 sbr->q_m[e][m] = av_mul_sf(sbr->q_m[e][m], gain_boost);
477 sbr->s_m[e][m] = av_mul_sf(sbr->s_m[e][m], gain_boost);
478 }
479 }
480 }
481}
482
483/// Assembling HF Signals (14496-3 sp04 p220)
484static void sbr_hf_assemble(int Y1[38][64][2],
485 const int X_high[64][40][2],
486 SpectralBandReplication *sbr, SBRData *ch_data,
487 const int e_a[2])
488{
489 int e, i, j, m;
490 const int h_SL = 4 * !sbr->bs_smoothing_mode;
491 const int kx = sbr->kx[1];
492 const int m_max = sbr->m[1];
493 static const SoftFloat h_smooth[5] = {
494 { 715827883, -1 },
495 { 647472402, -1 },
496 { 937030863, -2 },
497 { 989249804, -3 },
498 { 546843842, -4 },
499 };
500 SoftFloat (*g_temp)[48] = ch_data->g_temp, (*q_temp)[48] = ch_data->q_temp;
501 int indexnoise = ch_data->f_indexnoise;
502 int indexsine = ch_data->f_indexsine;
503
504 if (sbr->reset) {
505 for (i = 0; i < h_SL; i++) {
506 memcpy(g_temp[i + 2*ch_data->t_env[0]], sbr->gain[0], m_max * sizeof(sbr->gain[0][0]));
507 memcpy(q_temp[i + 2*ch_data->t_env[0]], sbr->q_m[0], m_max * sizeof(sbr->q_m[0][0]));
508 }
509 } else if (h_SL) {
510 for (i = 0; i < 4; i++) {
511 memcpy(g_temp[i + 2 * ch_data->t_env[0]],
512 g_temp[i + 2 * ch_data->t_env_num_env_old],
513 sizeof(g_temp[0]));
514 memcpy(q_temp[i + 2 * ch_data->t_env[0]],
515 q_temp[i + 2 * ch_data->t_env_num_env_old],
516 sizeof(q_temp[0]));
517 }
518 }
519
520 for (e = 0; e < ch_data->bs_num_env; e++) {
521 for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) {
522 memcpy(g_temp[h_SL + i], sbr->gain[e], m_max * sizeof(sbr->gain[0][0]));
523 memcpy(q_temp[h_SL + i], sbr->q_m[e], m_max * sizeof(sbr->q_m[0][0]));
524 }
525 }
526
527 for (e = 0; e < ch_data->bs_num_env; e++) {
528 for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) {
529 SoftFloat g_filt_tab[48];
530 SoftFloat q_filt_tab[48];
531 SoftFloat *g_filt, *q_filt;
532
533 if (h_SL && e != e_a[0] && e != e_a[1]) {
534 g_filt = g_filt_tab;
535 q_filt = q_filt_tab;
536 for (m = 0; m < m_max; m++) {
537 const int idx1 = i + h_SL;
538 g_filt[m].mant = g_filt[m].exp = 0;
539 q_filt[m].mant = q_filt[m].exp = 0;
540 for (j = 0; j <= h_SL; j++) {
541 g_filt[m] = av_add_sf(g_filt[m],
542 av_mul_sf(g_temp[idx1 - j][m],
543 h_smooth[j]));
544 q_filt[m] = av_add_sf(q_filt[m],
545 av_mul_sf(q_temp[idx1 - j][m],
546 h_smooth[j]));
547 }
548 }
549 } else {
550 g_filt = g_temp[i + h_SL];
551 q_filt = q_temp[i];
552 }
553
554 sbr->dsp.hf_g_filt(Y1[i] + kx, X_high + kx, g_filt, m_max,
555 i + ENVELOPE_ADJUSTMENT_OFFSET);
556
557 if (e != e_a[0] && e != e_a[1]) {
558 sbr->dsp.hf_apply_noise[indexsine](Y1[i] + kx, sbr->s_m[e],
559 q_filt, indexnoise,
560 kx, m_max);
561 } else {
562 int idx = indexsine&1;
563 int A = (1-((indexsine+(kx & 1))&2));
564 int B = (A^(-idx)) + idx;
565 int *out = &Y1[i][kx][idx];
566 int shift, round;
567
568 SoftFloat *in = sbr->s_m[e];
569 for (m = 0; m+1 < m_max; m+=2) {
570 shift = 22 - in[m ].exp;
571 round = 1 << (shift-1);
572 out[2*m ] += (in[m ].mant * A + round) >> shift;
573
574 shift = 22 - in[m+1].exp;
575 round = 1 << (shift-1);
576 out[2*m+2] += (in[m+1].mant * B + round) >> shift;
577 }
578 if(m_max&1)
579 {
580 shift = 22 - in[m ].exp;
581 round = 1 << (shift-1);
582
583 out[2*m ] += (in[m ].mant * A + round) >> shift;
584 }
585 }
586 indexnoise = (indexnoise + m_max) & 0x1ff;
587 indexsine = (indexsine + 1) & 3;
588 }
589 }
590 ch_data->f_indexnoise = indexnoise;
591 ch_data->f_indexsine = indexsine;
592}
593
594#include "aacsbr_template.c"
595
generated by cgit at 2024-05-18 04:43:10 (GMT)