FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/aacsbr_fixed.c
Date: 2026-09-18 03:39:54
Exec Total Coverage
Lines: 276 292 94.5%
Functions: 8 8 100.0%
Branches: 164 174 94.3%
Line Branch Exec Source
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 "aacps.h"
64 #include "sbrdsp.h"
65 #include "libavutil/internal.h"
66 #include "libavutil/avassert.h"
67
68 #include <stdint.h>
69 #include <float.h>
70 #include <math.h>
71
72 static void aacsbr_func_ptr_init(AACSBRContext *c);
73 static const int CONST_LN2 = Q31(0.6931471806/256); // ln(2)/256
74 static const int CONST_RECIP_LN2 = Q31(0.7213475204); // 0.5/ln(2)
75 static const int CONST_076923 = Q31(0.76923076923076923077f);
76
77 static const int fixed_log_table[10] =
78 {
79 Q31(1.0/2), Q31(1.0/3), Q31(1.0/4), Q31(1.0/5), Q31(1.0/6),
80 Q31(1.0/7), Q31(1.0/8), Q31(1.0/9), Q31(1.0/10), Q31(1.0/11)
81 };
82
83 24 static int fixed_log(int x)
84 {
85 int i, ret, xpow, tmp;
86
87 24 ret = x;
88 24 xpow = x;
89
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 144 for (i=0; i<10; i+=2){
90 120 xpow = (int)(((int64_t)xpow * x + 0x40000000) >> 31);
91 120 tmp = (int)(((int64_t)xpow * fixed_log_table[i] + 0x40000000) >> 31);
92 120 ret -= tmp;
93
94 120 xpow = (int)(((int64_t)xpow * x + 0x40000000) >> 31);
95 120 tmp = (int)(((int64_t)xpow * fixed_log_table[i+1] + 0x40000000) >> 31);
96 120 ret += tmp;
97 }
98
99 24 return ret;
100 }
101
102 static const int fixed_exp_table[7] =
103 {
104 Q31(1.0/2), Q31(1.0/6), Q31(1.0/24), Q31(1.0/120),
105 Q31(1.0/720), Q31(1.0/5040), Q31(1.0/40320)
106 };
107
108 12 static int fixed_exp(int x)
109 {
110 int i, ret, xpow, tmp;
111
112 12 ret = 0x800000 + x;
113 12 xpow = x;
114
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 96 for (i=0; i<7; i++){
115 84 xpow = (int)(((int64_t)xpow * x + 0x400000) >> 23);
116 84 tmp = (int)(((int64_t)xpow * fixed_exp_table[i] + 0x40000000) >> 31);
117 84 ret += tmp;
118 }
119
120 12 return ret;
121 }
122
123 12 static void make_bands(int16_t* bands, int start, int stop, int num_bands)
124 {
125 int k, previous, present;
126 12 int base, prod, nz = 0;
127
128 12 base = (stop << 23) / start;
129
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 85 while (base < 0x40000000){
130 73 base <<= 1;
131 73 nz++;
132 }
133 12 base = fixed_log(base - 0x80000000);
134 12 base = (((base + 0x80) >> 8) + (8-nz)*CONST_LN2) / num_bands;
135 12 base = fixed_exp(base);
136
137 12 previous = start;
138 12 prod = start << 23;
139
140
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 123 for (k = 0; k < num_bands-1; k++) {
141 111 prod = (int)(((int64_t)prod * base + 0x400000) >> 23);
142 111 present = (prod + 0x400000) >> 23;
143 111 bands[k] = present - previous;
144 111 previous = present;
145 }
146 12 bands[num_bands-1] = stop - previous;
147 12 }
148
149 /// Dequantization and stereo decoding (14496-3 sp04 p203)
150 2082 static void sbr_dequant(SpectralBandReplication *sbr, int id_aac)
151 {
152 int k, e;
153 int ch;
154
155
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 3362 if (id_aac == TYPE_CPE && sbr->bs_coupling) {
156
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 1280 int alpha = sbr->data[0].bs_amp_res ? 2 : 1;
157
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 1280 int pan_offset = sbr->data[0].bs_amp_res ? 12 : 24;
158
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 2922 for (e = 1; e <= sbr->data[0].bs_num_env; e++) {
159
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 19065 for (k = 0; k < sbr->n[sbr->data[0].bs_freq_res[e]]; k++) {
160 SoftFloat temp1, temp2, fac;
161
162 17423 temp1.exp = sbr->data[0].env_facs_q[e][k] * alpha + 14;
163
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 17423 if (temp1.exp & 1)
164 4733 temp1.mant = 759250125;
165 else
166 12690 temp1.mant = 0x20000000;
167 17423 temp1.exp = (temp1.exp >> 1) + 1;
168
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 17423 if (temp1.exp > 66) { // temp1 > 1E20
169 ✗ av_log(NULL, AV_LOG_ERROR, "envelope scalefactor overflow in dequant\n");
170 ✗ temp1 = FLOAT_1;
171 }
172
173 17423 temp2.exp = (pan_offset - sbr->data[1].env_facs_q[e][k]) * alpha;
174
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 17423 if (temp2.exp & 1)
175 ✗ temp2.mant = 759250125;
176 else
177 17423 temp2.mant = 0x20000000;
178 17423 temp2.exp = (temp2.exp >> 1) + 1;
179 17423 fac = av_div_sf(temp1, av_add_sf(FLOAT_1, temp2));
180 17423 sbr->data[0].env_facs[e][k] = fac;
181 17423 sbr->data[1].env_facs[e][k] = av_mul_sf(fac, temp2);
182 }
183 }
184
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 2837 for (e = 1; e <= sbr->data[0].bs_num_noise; e++) {
185
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 5699 for (k = 0; k < sbr->n_q; k++) {
186 SoftFloat temp1, temp2, fac;
187
188 4142 temp1.exp = NOISE_FLOOR_OFFSET - \
189 4142 sbr->data[0].noise_facs_q[e][k] + 2;
190 4142 temp1.mant = 0x20000000;
191
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 4142 av_assert0(temp1.exp <= 66);
192 4142 temp2.exp = 12 - sbr->data[1].noise_facs_q[e][k] + 1;
193 4142 temp2.mant = 0x20000000;
194 4142 fac = av_div_sf(temp1, av_add_sf(FLOAT_1, temp2));
195 4142 sbr->data[0].noise_facs[e][k] = fac;
196 4142 sbr->data[1].noise_facs[e][k] = av_mul_sf(fac, temp2);
197 }
198 }
199 } else { // SCE or one non-coupled CPE
200
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 2029 for (ch = 0; ch < (id_aac == TYPE_CPE) + 1; ch++) {
201
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 1227 int alpha = sbr->data[ch].bs_amp_res ? 2 : 1;
202
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 3531 for (e = 1; e <= sbr->data[ch].bs_num_env; e++)
203
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 26435 for (k = 0; k < sbr->n[sbr->data[ch].bs_freq_res[e]]; k++){
204 SoftFloat temp1;
205
206 24131 temp1.exp = alpha * sbr->data[ch].env_facs_q[e][k] + 12;
207
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 24131 if (temp1.exp & 1)
208 2958 temp1.mant = 759250125;
209 else
210 21173 temp1.mant = 0x20000000;
211 24131 temp1.exp = (temp1.exp >> 1) + 1;
212
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 24131 if (temp1.exp > 66) { // temp1 > 1E20
213 ✗ av_log(NULL, AV_LOG_ERROR, "envelope scalefactor overflow in dequant\n");
214 ✗ temp1 = FLOAT_1;
215 }
216 24131 sbr->data[ch].env_facs[e][k] = temp1;
217 }
218
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 3181 for (e = 1; e <= sbr->data[ch].bs_num_noise; e++)
219
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 7656 for (k = 0; k < sbr->n_q; k++){
220 5702 sbr->data[ch].noise_facs[e][k].exp = NOISE_FLOOR_OFFSET - \
221 5702 sbr->data[ch].noise_facs_q[e][k] + 1;
222 5702 sbr->data[ch].noise_facs[e][k].mant = 0x20000000;
223 }
224 }
225 }
226 2082 }
227
228 /** High Frequency Generation (14496-3 sp04 p214+) and Inverse Filtering
229 * (14496-3 sp04 p214)
230 * Warning: This routine does not seem numerically stable.
231 */
232 3787 static void sbr_hf_inverse_filter(SBRDSPContext *dsp,
233 int (*alpha0)[2], int (*alpha1)[2],
234 const int X_low[32][40][2], int k0)
235 {
236 int k;
237 int shift, round;
238
239
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 71885 for (k = 0; k < k0; k++) {
240 SoftFloat phi[3][2][2];
241 SoftFloat a00, a01, a10, a11;
242 SoftFloat dk;
243
244 68098 dsp->autocorrelate(X_low[k], phi);
245
246 68098 dk = av_sub_sf(av_mul_sf(phi[2][1][0], phi[1][0][0]),
247 av_mul_sf(av_add_sf(av_mul_sf(phi[1][1][0], phi[1][1][0]),
248 av_mul_sf(phi[1][1][1], phi[1][1][1])), FLOAT_0999999));
249
250
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 68098 if (!dk.mant) {
251 1715 a10 = FLOAT_0;
252 1715 a11 = FLOAT_0;
253 } else {
254 SoftFloat temp_real, temp_im;
255 66383 temp_real = av_sub_sf(av_sub_sf(av_mul_sf(phi[0][0][0], phi[1][1][0]),
256 av_mul_sf(phi[0][0][1], phi[1][1][1])),
257 av_mul_sf(phi[0][1][0], phi[1][0][0]));
258 66383 temp_im = av_sub_sf(av_add_sf(av_mul_sf(phi[0][0][0], phi[1][1][1]),
259 av_mul_sf(phi[0][0][1], phi[1][1][0])),
260 av_mul_sf(phi[0][1][1], phi[1][0][0]));
261
262 66383 a10 = av_div_sf(temp_real, dk);
263 66383 a11 = av_div_sf(temp_im, dk);
264 }
265
266
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 68098 if (!phi[1][0][0].mant) {
267 1716 a00 = FLOAT_0;
268 1716 a01 = FLOAT_0;
269 } else {
270 SoftFloat temp_real, temp_im;
271 66382 temp_real = av_add_sf(phi[0][0][0],
272 av_add_sf(av_mul_sf(a10, phi[1][1][0]),
273 av_mul_sf(a11, phi[1][1][1])));
274 66382 temp_im = av_add_sf(phi[0][0][1],
275 av_sub_sf(av_mul_sf(a11, phi[1][1][0]),
276 av_mul_sf(a10, phi[1][1][1])));
277
278 66382 temp_real.mant = -temp_real.mant;
279 66382 temp_im.mant = -temp_im.mant;
280 66382 a00 = av_div_sf(temp_real, phi[1][0][0]);
281 66382 a01 = av_div_sf(temp_im, phi[1][0][0]);
282 }
283
284 68098 shift = a00.exp;
285
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 68098 if (shift >= 3)
286 2 alpha0[k][0] = 0x7fffffff;
287
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 68096 else if (shift <= -30)
288 2050 alpha0[k][0] = 0;
289 else {
290 66046 shift = 1-shift;
291
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 66046 if (shift <= 0)
292 1836 alpha0[k][0] = a00.mant * (1<<-shift);
293 else {
294 64210 round = 1 << (shift-1);
295 64210 alpha0[k][0] = (a00.mant + round) >> shift;
296 }
297 }
298
299 68098 shift = a01.exp;
300
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 68098 if (shift >= 3)
301 2 alpha0[k][1] = 0x7fffffff;
302
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 68096 else if (shift <= -30)
303 2000 alpha0[k][1] = 0;
304 else {
305 66096 shift = 1-shift;
306
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 66096 if (shift <= 0)
307 14380 alpha0[k][1] = a01.mant * (1<<-shift);
308 else {
309 51716 round = 1 << (shift-1);
310 51716 alpha0[k][1] = (a01.mant + round) >> shift;
311 }
312 }
313 68098 shift = a10.exp;
314
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 68098 if (shift >= 3)
315 2 alpha1[k][0] = 0x7fffffff;
316
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 68096 else if (shift <= -30)
317 1985 alpha1[k][0] = 0;
318 else {
319 66111 shift = 1-shift;
320
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 66111 if (shift <= 0)
321 75 alpha1[k][0] = a10.mant * (1<<-shift);
322 else {
323 66036 round = 1 << (shift-1);
324 66036 alpha1[k][0] = (a10.mant + round) >> shift;
325 }
326 }
327
328 68098 shift = a11.exp;
329
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 68098 if (shift >= 3)
330 ✗ alpha1[k][1] = 0x7fffffff;
331
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 68098 else if (shift <= -30)
332 2045 alpha1[k][1] = 0;
333 else {
334 66053 shift = 1-shift;
335
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 66053 if (shift <= 0)
336 85 alpha1[k][1] = a11.mant * (1<<-shift);
337 else {
338 65968 round = 1 << (shift-1);
339 65968 alpha1[k][1] = (a11.mant + round) >> shift;
340 }
341 }
342
343 68098 shift = (int)(((int64_t)(alpha1[k][0]>>1) * (alpha1[k][0]>>1) + \
344 68098 (int64_t)(alpha1[k][1]>>1) * (alpha1[k][1]>>1) + \
345 68098 0x40000000) >> 31);
346
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 68098 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 68098 shift = (int)(((int64_t)(alpha0[k][0]>>1) * (alpha0[k][0]>>1) + \
354 68098 (int64_t)(alpha0[k][1]>>1) * (alpha0[k][1]>>1) + \
355 68098 0x40000000) >> 31);
356
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 68098 if (shift >= 0x20000000){
357 2 alpha1[k][0] = 0;
358 2 alpha1[k][1] = 0;
359 2 alpha0[k][0] = 0;
360 2 alpha0[k][1] = 0;
361 }
362 }
363 3787 }
364
365 /// Chirp Factors (14496-3 sp04 p214)
366 3787 static 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
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 14000 for (i = 0; i < sbr->n_q; i++) {
374
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 10213 if (ch_data->bs_invf_mode[0][i] + ch_data->bs_invf_mode[1][i] == 1)
375 799 new_bw = 1288490189;
376 else
377 9414 new_bw = bw_tab[ch_data->bs_invf_mode[0][i]];
378
379
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 10213 if (new_bw < ch_data->bw_array[i]){
380 2080 accu = (int64_t)new_bw * 1610612736;
381 2080 accu += (int64_t)ch_data->bw_array[i] * 0x20000000;
382 2080 new_bw = (int)((accu + 0x40000000) >> 31);
383 } else {
384 8133 accu = (int64_t)new_bw * 1946157056;
385 8133 accu += (int64_t)ch_data->bw_array[i] * 201326592;
386 8133 new_bw = (int)((accu + 0x40000000) >> 31);
387 }
388
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 10213 ch_data->bw_array[i] = new_bw < 0x2000000 ? 0 : new_bw;
389 }
390 3787 }
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 */
396 3787 static void sbr_gain_calc(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
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 9375 for (e = 0; e < ch_data->bs_num_env; e++) {
405
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 5588 int delta = !((e == e_a[1]) || (e == e_a[0]));
406
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 23292 for (k = 0; k < sbr->n_lim; k++) {
407 SoftFloat gain_boost, gain_max;
408 SoftFloat sum[2];
409 17704 sum[0] = sum[1] = FLOAT_0;
410
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 145541 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
411 127837 const SoftFloat temp = av_div_sf(sbr->e_origmapped[e][m],
412 av_add_sf(FLOAT_1, sbr->q_mapped[e][m]));
413 127837 sbr->q_m[e][m] = av_sqrt_sf(av_mul_sf(temp, sbr->q_mapped[e][m]));
414 127837 sbr->s_m[e][m] = av_sqrt_sf(av_mul_sf(temp, av_int2sf(ch_data->s_indexmapped[e + 1][m], 0)));
415
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 127837 if (!sbr->s_mapped[e][m]) {
416
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 123205 if (delta) {
417 115357 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 7848 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 4632 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 127837 sbr->gain[e][m] = av_add_sf(sbr->gain[e][m], FLOAT_MIN);
433 }
434
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 145541 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
435 127837 sum[0] = av_add_sf(sum[0], sbr->e_origmapped[e][m]);
436 127837 sum[1] = av_add_sf(sum[1], sbr->e_curr[e][m]);
437 }
438 17704 gain_max = av_mul_sf(limgain[sbr->bs_limiter_gains],
439 av_sqrt_sf(
440 av_div_sf(
441 av_add_sf(FLOAT_EPSILON, sum[0]),
442 av_add_sf(FLOAT_EPSILON, sum[1]))));
443
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 17704 if (av_gt_sf(gain_max, FLOAT_100000))
444 3741 gain_max = FLOAT_100000;
445
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 145541 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
446 127837 SoftFloat q_m_max = av_div_sf(
447 av_mul_sf(sbr->q_m[e][m], gain_max),
448 sbr->gain[e][m]);
449
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 127837 if (av_gt_sf(sbr->q_m[e][m], q_m_max))
450 33576 sbr->q_m[e][m] = q_m_max;
451
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 127837 if (av_gt_sf(sbr->gain[e][m], gain_max))
452 33576 sbr->gain[e][m] = gain_max;
453 }
454 17704 sum[0] = sum[1] = FLOAT_0;
455
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 145541 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
456 127837 sum[0] = av_add_sf(sum[0], sbr->e_origmapped[e][m]);
457 127837 sum[1] = av_add_sf(sum[1],
458 av_mul_sf(
459 av_mul_sf(sbr->e_curr[e][m],
460 sbr->gain[e][m]),
461 sbr->gain[e][m]));
462 127837 sum[1] = av_add_sf(sum[1],
463 av_mul_sf(sbr->s_m[e][m], sbr->s_m[e][m]));
464
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 127837 if (delta && !sbr->s_m[e][m].mant)
465 117689 sum[1] = av_add_sf(sum[1],
466 av_mul_sf(sbr->q_m[e][m], sbr->q_m[e][m]));
467 }
468 17704 gain_boost = av_sqrt_sf(
469 av_div_sf(
470 av_add_sf(FLOAT_EPSILON, sum[0]),
471 av_add_sf(FLOAT_EPSILON, sum[1])));
472
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 17704 if (av_gt_sf(gain_boost, FLOAT_1584893192))
473 1483 gain_boost = FLOAT_1584893192;
474
475
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 145541 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
476 127837 sbr->gain[e][m] = av_mul_sf(sbr->gain[e][m], gain_boost);
477 127837 sbr->q_m[e][m] = av_mul_sf(sbr->q_m[e][m], gain_boost);
478 127837 sbr->s_m[e][m] = av_mul_sf(sbr->s_m[e][m], gain_boost);
479 }
480 }
481 }
482 3787 }
483
484 /// Assembling HF Signals (14496-3 sp04 p220)
485 3787 static void sbr_hf_assemble(int Y1[38][64][2],
486 const int X_high[64][40][2],
487 SpectralBandReplication *sbr, SBRData *ch_data,
488 const int e_a[2])
489 {
490 int e, i, j, m;
491
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 3787 const int h_SL = 4 * !sbr->bs_smoothing_mode;
492 3787 const int kx = sbr->kx[1];
493 3787 const int m_max = sbr->m[1];
494 static const SoftFloat h_smooth[5] = {
495 { 715827883, -1 },
496 { 647472402, -1 },
497 { 937030863, -2 },
498 { 989249804, -3 },
499 { 546843842, -4 },
500 };
501 3787 SoftFloat (*g_temp)[48] = ch_data->g_temp, (*q_temp)[48] = ch_data->q_temp;
502 3787 int indexnoise = ch_data->f_indexnoise;
503 3787 int indexsine = ch_data->f_indexsine;
504
505
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 3787 if (sbr->reset) {
506
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 17 for (i = 0; i < h_SL; i++) {
507 8 memcpy(g_temp[i + 2*ch_data->t_env[0]], sbr->gain[0], m_max * sizeof(sbr->gain[0][0]));
508 8 memcpy(q_temp[i + 2*ch_data->t_env[0]], sbr->q_m[0], m_max * sizeof(sbr->q_m[0][0]));
509 }
510
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 3778 } else if (h_SL) {
511
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 5730 for (i = 0; i < 4; i++) {
512 4584 memcpy(g_temp[i + 2 * ch_data->t_env[0]],
513 4584 g_temp[i + 2 * ch_data->t_env_num_env_old],
514 sizeof(g_temp[0]));
515 4584 memcpy(q_temp[i + 2 * ch_data->t_env[0]],
516 4584 q_temp[i + 2 * ch_data->t_env_num_env_old],
517 sizeof(q_temp[0]));
518 }
519 }
520
521
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 9375 for (e = 0; e < ch_data->bs_num_env; e++) {
522
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 126772 for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) {
523 121184 memcpy(g_temp[h_SL + i], sbr->gain[e], m_max * sizeof(sbr->gain[0][0]));
524 121184 memcpy(q_temp[h_SL + i], sbr->q_m[e], m_max * sizeof(sbr->q_m[0][0]));
525 }
526 }
527
528
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 9375 for (e = 0; e < ch_data->bs_num_env; e++) {
529
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 126772 for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) {
530 SoftFloat g_filt_tab[48];
531 SoftFloat q_filt_tab[48];
532 SoftFloat *g_filt, *q_filt;
533
534
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 121184 if (h_SL && e != e_a[0] && e != e_a[1]) {
535 36634 g_filt = g_filt_tab;
536 36634 q_filt = q_filt_tab;
537
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 659412 for (m = 0; m < m_max; m++) {
538 622778 const int idx1 = i + h_SL;
539 622778 g_filt[m].mant = g_filt[m].exp = 0;
540 622778 q_filt[m].mant = q_filt[m].exp = 0;
541
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 3736668 for (j = 0; j <= h_SL; j++) {
542 3113890 g_filt[m] = av_add_sf(g_filt[m],
543 3113890 av_mul_sf(g_temp[idx1 - j][m],
544 h_smooth[j]));
545 3113890 q_filt[m] = av_add_sf(q_filt[m],
546 3113890 av_mul_sf(q_temp[idx1 - j][m],
547 h_smooth[j]));
548 }
549 }
550 } else {
551 84550 g_filt = g_temp[i + h_SL];
552 84550 q_filt = q_temp[i];
553 }
554
555 121184 sbr->dsp.hf_g_filt(Y1[i] + kx, X_high + kx, g_filt, m_max,
556 121184 i + ENVELOPE_ADJUSTMENT_OFFSET);
557
558
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 121184 if (e != e_a[0] && e != e_a[1]) {
559 119686 sbr->dsp.hf_apply_noise[indexsine](Y1[i] + kx, sbr->s_m[e],
560 q_filt, indexnoise,
561 kx, m_max);
562 } else {
563 1498 int idx = indexsine&1;
564 1498 int A = (1-((indexsine+(kx & 1))&2));
565 1498 int B = (A^(-idx)) + idx;
566 1498 unsigned *out = &Y1[i][kx][idx];
567 int shift;
568 unsigned round;
569
570 1498 SoftFloat *in = sbr->s_m[e];
571
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 18898 for (m = 0; m+1 < m_max; m+=2) {
572 int shift2;
573 17400 shift = 22 - in[m ].exp;
574 17400 shift2= 22 - in[m+1].exp;
575
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 17400 if (shift < 1 || shift2 < 1) {
576 ✗ av_log(NULL, AV_LOG_ERROR, "Overflow in sbr_hf_assemble, shift=%d,%d\n", shift, shift2);
577 ✗ return;
578 }
579
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 17400 if (shift < 32) {
580 600 round = 1 << (shift-1);
581 600 out[2*m ] += (int)(in[m ].mant * A + round) >> shift;
582 }
583
584
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 17400 if (shift2 < 32) {
585 152 round = 1 << (shift2-1);
586 152 out[2*m+2] += (int)(in[m+1].mant * B + round) >> shift2;
587 }
588 }
589
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 1498 if(m_max&1)
590 {
591 1004 shift = 22 - in[m ].exp;
592
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 1004 if (shift < 1) {
593 ✗ av_log(NULL, AV_LOG_ERROR, "Overflow in sbr_hf_assemble, shift=%d\n", shift);
594 ✗ return;
595
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 1004 } else if (shift < 32) {
596 ✗ round = 1 << (shift-1);
597 ✗ out[2*m ] += (int)(in[m ].mant * A + round) >> shift;
598 }
599 }
600 }
601 121184 indexnoise = (indexnoise + m_max) & 0x1ff;
602 121184 indexsine = (indexsine + 1) & 3;
603 }
604 }
605 3787 ch_data->f_indexnoise = indexnoise;
606 3787 ch_data->f_indexsine = indexsine;
607 }
608
609 #include "aacsbr_template.c"
610