FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/aacsbr_fixed.c
Date: 2023-10-02 11:06:47
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/libm.h"
67 #include "libavutil/avassert.h"
68
69 #include <stdint.h>
70 #include <float.h>
71 #include <math.h>
72
73 static VLC vlc_sbr[10];
74 static void aacsbr_func_ptr_init(AACSBRContext *c);
75 static const int CONST_LN2 = Q31(0.6931471806/256); // ln(2)/256
76 static const int CONST_RECIP_LN2 = Q31(0.7213475204); // 0.5/ln(2)
77 static const int CONST_076923 = Q31(0.76923076923076923077f);
78
79 static const int fixed_log_table[10] =
80 {
81 Q31(1.0/2), Q31(1.0/3), Q31(1.0/4), Q31(1.0/5), Q31(1.0/6),
82 Q31(1.0/7), Q31(1.0/8), Q31(1.0/9), Q31(1.0/10), Q31(1.0/11)
83 };
84
85 24 static int fixed_log(int x)
86 {
87 int i, ret, xpow, tmp;
88
89 24 ret = x;
90 24 xpow = x;
91
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 144 for (i=0; i<10; i+=2){
92 120 xpow = (int)(((int64_t)xpow * x + 0x40000000) >> 31);
93 120 tmp = (int)(((int64_t)xpow * fixed_log_table[i] + 0x40000000) >> 31);
94 120 ret -= tmp;
95
96 120 xpow = (int)(((int64_t)xpow * x + 0x40000000) >> 31);
97 120 tmp = (int)(((int64_t)xpow * fixed_log_table[i+1] + 0x40000000) >> 31);
98 120 ret += tmp;
99 }
100
101 24 return ret;
102 }
103
104 static const int fixed_exp_table[7] =
105 {
106 Q31(1.0/2), Q31(1.0/6), Q31(1.0/24), Q31(1.0/120),
107 Q31(1.0/720), Q31(1.0/5040), Q31(1.0/40320)
108 };
109
110 12 static int fixed_exp(int x)
111 {
112 int i, ret, xpow, tmp;
113
114 12 ret = 0x800000 + x;
115 12 xpow = x;
116
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 96 for (i=0; i<7; i++){
117 84 xpow = (int)(((int64_t)xpow * x + 0x400000) >> 23);
118 84 tmp = (int)(((int64_t)xpow * fixed_exp_table[i] + 0x40000000) >> 31);
119 84 ret += tmp;
120 }
121
122 12 return ret;
123 }
124
125 12 static void make_bands(int16_t* bands, int start, int stop, int num_bands)
126 {
127 int k, previous, present;
128 12 int base, prod, nz = 0;
129
130 12 base = (stop << 23) / start;
131
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 85 while (base < 0x40000000){
132 73 base <<= 1;
133 73 nz++;
134 }
135 12 base = fixed_log(base - 0x80000000);
136 12 base = (((base + 0x80) >> 8) + (8-nz)*CONST_LN2) / num_bands;
137 12 base = fixed_exp(base);
138
139 12 previous = start;
140 12 prod = start << 23;
141
142
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 123 for (k = 0; k < num_bands-1; k++) {
143 111 prod = (int)(((int64_t)prod * base + 0x400000) >> 23);
144 111 present = (prod + 0x400000) >> 23;
145 111 bands[k] = present - previous;
146 111 previous = present;
147 }
148 12 bands[num_bands-1] = stop - previous;
149 12 }
150
151 /// Dequantization and stereo decoding (14496-3 sp04 p203)
152 2082 static void sbr_dequant(SpectralBandReplication *sbr, int id_aac)
153 {
154 int k, e;
155 int ch;
156
157
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 3362 if (id_aac == TYPE_CPE && sbr->bs_coupling) {
158
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 1280 int alpha = sbr->data[0].bs_amp_res ? 2 : 1;
159
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 1280 int pan_offset = sbr->data[0].bs_amp_res ? 12 : 24;
160
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 2922 for (e = 1; e <= sbr->data[0].bs_num_env; e++) {
161
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 19065 for (k = 0; k < sbr->n[sbr->data[0].bs_freq_res[e]]; k++) {
162 SoftFloat temp1, temp2, fac;
163
164 17423 temp1.exp = sbr->data[0].env_facs_q[e][k] * alpha + 14;
165
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 17423 if (temp1.exp & 1)
166 4733 temp1.mant = 759250125;
167 else
168 12690 temp1.mant = 0x20000000;
169 17423 temp1.exp = (temp1.exp >> 1) + 1;
170
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 17423 if (temp1.exp > 66) { // temp1 > 1E20
171 ✗ av_log(NULL, AV_LOG_ERROR, "envelope scalefactor overflow in dequant\n");
172 ✗ temp1 = FLOAT_1;
173 }
174
175 17423 temp2.exp = (pan_offset - sbr->data[1].env_facs_q[e][k]) * alpha;
176
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 17423 if (temp2.exp & 1)
177 ✗ temp2.mant = 759250125;
178 else
179 17423 temp2.mant = 0x20000000;
180 17423 temp2.exp = (temp2.exp >> 1) + 1;
181 17423 fac = av_div_sf(temp1, av_add_sf(FLOAT_1, temp2));
182 17423 sbr->data[0].env_facs[e][k] = fac;
183 17423 sbr->data[1].env_facs[e][k] = av_mul_sf(fac, temp2);
184 }
185 }
186
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 2837 for (e = 1; e <= sbr->data[0].bs_num_noise; e++) {
187
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 5699 for (k = 0; k < sbr->n_q; k++) {
188 SoftFloat temp1, temp2, fac;
189
190 4142 temp1.exp = NOISE_FLOOR_OFFSET - \
191 4142 sbr->data[0].noise_facs_q[e][k] + 2;
192 4142 temp1.mant = 0x20000000;
193
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 4142 av_assert0(temp1.exp <= 66);
194 4142 temp2.exp = 12 - sbr->data[1].noise_facs_q[e][k] + 1;
195 4142 temp2.mant = 0x20000000;
196 4142 fac = av_div_sf(temp1, av_add_sf(FLOAT_1, temp2));
197 4142 sbr->data[0].noise_facs[e][k] = fac;
198 4142 sbr->data[1].noise_facs[e][k] = av_mul_sf(fac, temp2);
199 }
200 }
201 } else { // SCE or one non-coupled CPE
202
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 2029 for (ch = 0; ch < (id_aac == TYPE_CPE) + 1; ch++) {
203
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 1227 int alpha = sbr->data[ch].bs_amp_res ? 2 : 1;
204
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 3531 for (e = 1; e <= sbr->data[ch].bs_num_env; e++)
205
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 26435 for (k = 0; k < sbr->n[sbr->data[ch].bs_freq_res[e]]; k++){
206 SoftFloat temp1;
207
208 24131 temp1.exp = alpha * sbr->data[ch].env_facs_q[e][k] + 12;
209
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 24131 if (temp1.exp & 1)
210 2958 temp1.mant = 759250125;
211 else
212 21173 temp1.mant = 0x20000000;
213 24131 temp1.exp = (temp1.exp >> 1) + 1;
214
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 24131 if (temp1.exp > 66) { // temp1 > 1E20
215 ✗ av_log(NULL, AV_LOG_ERROR, "envelope scalefactor overflow in dequant\n");
216 ✗ temp1 = FLOAT_1;
217 }
218 24131 sbr->data[ch].env_facs[e][k] = temp1;
219 }
220
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 3181 for (e = 1; e <= sbr->data[ch].bs_num_noise; e++)
221
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 7656 for (k = 0; k < sbr->n_q; k++){
222 5702 sbr->data[ch].noise_facs[e][k].exp = NOISE_FLOOR_OFFSET - \
223 5702 sbr->data[ch].noise_facs_q[e][k] + 1;
224 5702 sbr->data[ch].noise_facs[e][k].mant = 0x20000000;
225 }
226 }
227 }
228 2082 }
229
230 /** High Frequency Generation (14496-3 sp04 p214+) and Inverse Filtering
231 * (14496-3 sp04 p214)
232 * Warning: This routine does not seem numerically stable.
233 */
234 3787 static void sbr_hf_inverse_filter(SBRDSPContext *dsp,
235 int (*alpha0)[2], int (*alpha1)[2],
236 const int X_low[32][40][2], int k0)
237 {
238 int k;
239 int shift, round;
240
241
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 71885 for (k = 0; k < k0; k++) {
242 SoftFloat phi[3][2][2];
243 SoftFloat a00, a01, a10, a11;
244 SoftFloat dk;
245
246 68098 dsp->autocorrelate(X_low[k], phi);
247
248 68098 dk = av_sub_sf(av_mul_sf(phi[2][1][0], phi[1][0][0]),
249 av_mul_sf(av_add_sf(av_mul_sf(phi[1][1][0], phi[1][1][0]),
250 av_mul_sf(phi[1][1][1], phi[1][1][1])), FLOAT_0999999));
251
252
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 68098 if (!dk.mant) {
253 1715 a10 = FLOAT_0;
254 1715 a11 = FLOAT_0;
255 } else {
256 SoftFloat temp_real, temp_im;
257 66383 temp_real = av_sub_sf(av_sub_sf(av_mul_sf(phi[0][0][0], phi[1][1][0]),
258 av_mul_sf(phi[0][0][1], phi[1][1][1])),
259 av_mul_sf(phi[0][1][0], phi[1][0][0]));
260 66383 temp_im = av_sub_sf(av_add_sf(av_mul_sf(phi[0][0][0], phi[1][1][1]),
261 av_mul_sf(phi[0][0][1], phi[1][1][0])),
262 av_mul_sf(phi[0][1][1], phi[1][0][0]));
263
264 66383 a10 = av_div_sf(temp_real, dk);
265 66383 a11 = av_div_sf(temp_im, dk);
266 }
267
268
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 68098 if (!phi[1][0][0].mant) {
269 1716 a00 = FLOAT_0;
270 1716 a01 = FLOAT_0;
271 } else {
272 SoftFloat temp_real, temp_im;
273 66382 temp_real = av_add_sf(phi[0][0][0],
274 av_add_sf(av_mul_sf(a10, phi[1][1][0]),
275 av_mul_sf(a11, phi[1][1][1])));
276 66382 temp_im = av_add_sf(phi[0][0][1],
277 av_sub_sf(av_mul_sf(a11, phi[1][1][0]),
278 av_mul_sf(a10, phi[1][1][1])));
279
280 66382 temp_real.mant = -temp_real.mant;
281 66382 temp_im.mant = -temp_im.mant;
282 66382 a00 = av_div_sf(temp_real, phi[1][0][0]);
283 66382 a01 = av_div_sf(temp_im, phi[1][0][0]);
284 }
285
286 68098 shift = a00.exp;
287
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 68098 if (shift >= 3)
288 2 alpha0[k][0] = 0x7fffffff;
289
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 68096 else if (shift <= -30)
290 2050 alpha0[k][0] = 0;
291 else {
292 66046 shift = 1-shift;
293
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 66046 if (shift <= 0)
294 1836 alpha0[k][0] = a00.mant * (1<<-shift);
295 else {
296 64210 round = 1 << (shift-1);
297 64210 alpha0[k][0] = (a00.mant + round) >> shift;
298 }
299 }
300
301 68098 shift = a01.exp;
302
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 68098 if (shift >= 3)
303 2 alpha0[k][1] = 0x7fffffff;
304
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 68096 else if (shift <= -30)
305 2000 alpha0[k][1] = 0;
306 else {
307 66096 shift = 1-shift;
308
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 66096 if (shift <= 0)
309 14380 alpha0[k][1] = a01.mant * (1<<-shift);
310 else {
311 51716 round = 1 << (shift-1);
312 51716 alpha0[k][1] = (a01.mant + round) >> shift;
313 }
314 }
315 68098 shift = a10.exp;
316
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 68098 if (shift >= 3)
317 2 alpha1[k][0] = 0x7fffffff;
318
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 68096 else if (shift <= -30)
319 1985 alpha1[k][0] = 0;
320 else {
321 66111 shift = 1-shift;
322
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 66111 if (shift <= 0)
323 75 alpha1[k][0] = a10.mant * (1<<-shift);
324 else {
325 66036 round = 1 << (shift-1);
326 66036 alpha1[k][0] = (a10.mant + round) >> shift;
327 }
328 }
329
330 68098 shift = a11.exp;
331
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 68098 if (shift >= 3)
332 ✗ alpha1[k][1] = 0x7fffffff;
333
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 68098 else if (shift <= -30)
334 2045 alpha1[k][1] = 0;
335 else {
336 66053 shift = 1-shift;
337
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 66053 if (shift <= 0)
338 85 alpha1[k][1] = a11.mant * (1<<-shift);
339 else {
340 65968 round = 1 << (shift-1);
341 65968 alpha1[k][1] = (a11.mant + round) >> shift;
342 }
343 }
344
345 68098 shift = (int)(((int64_t)(alpha1[k][0]>>1) * (alpha1[k][0]>>1) + \
346 68098 (int64_t)(alpha1[k][1]>>1) * (alpha1[k][1]>>1) + \
347 68098 0x40000000) >> 31);
348
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 68098 if (shift >= 0x20000000){
349 ✗ alpha1[k][0] = 0;
350 ✗ alpha1[k][1] = 0;
351 ✗ alpha0[k][0] = 0;
352 ✗ alpha0[k][1] = 0;
353 }
354
355 68098 shift = (int)(((int64_t)(alpha0[k][0]>>1) * (alpha0[k][0]>>1) + \
356 68098 (int64_t)(alpha0[k][1]>>1) * (alpha0[k][1]>>1) + \
357 68098 0x40000000) >> 31);
358
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 68098 if (shift >= 0x20000000){
359 2 alpha1[k][0] = 0;
360 2 alpha1[k][1] = 0;
361 2 alpha0[k][0] = 0;
362 2 alpha0[k][1] = 0;
363 }
364 }
365 3787 }
366
367 /// Chirp Factors (14496-3 sp04 p214)
368 3787 static void sbr_chirp(SpectralBandReplication *sbr, SBRData *ch_data)
369 {
370 int i;
371 int new_bw;
372 static const int bw_tab[] = { 0, 1610612736, 1932735283, 2104533975 };
373 int64_t accu;
374
375
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 14000 for (i = 0; i < sbr->n_q; i++) {
376
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 10213 if (ch_data->bs_invf_mode[0][i] + ch_data->bs_invf_mode[1][i] == 1)
377 799 new_bw = 1288490189;
378 else
379 9414 new_bw = bw_tab[ch_data->bs_invf_mode[0][i]];
380
381
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 10213 if (new_bw < ch_data->bw_array[i]){
382 2080 accu = (int64_t)new_bw * 1610612736;
383 2080 accu += (int64_t)ch_data->bw_array[i] * 0x20000000;
384 2080 new_bw = (int)((accu + 0x40000000) >> 31);
385 } else {
386 8133 accu = (int64_t)new_bw * 1946157056;
387 8133 accu += (int64_t)ch_data->bw_array[i] * 201326592;
388 8133 new_bw = (int)((accu + 0x40000000) >> 31);
389 }
390
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 10213 ch_data->bw_array[i] = new_bw < 0x2000000 ? 0 : new_bw;
391 }
392 3787 }
393
394 /**
395 * Calculation of levels of additional HF signal components (14496-3 sp04 p219)
396 * and Calculation of gain (14496-3 sp04 p219)
397 */
398 3787 static void sbr_gain_calc(AACContext *ac, SpectralBandReplication *sbr,
399 SBRData *ch_data, const int e_a[2])
400 {
401 int e, k, m;
402 // max gain limits : -3dB, 0dB, 3dB, inf dB (limiter off)
403 static const SoftFloat limgain[4] = { { 760155524, 0 }, { 0x20000000, 1 },
404 { 758351638, 1 }, { 625000000, 34 } };
405
406
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 9375 for (e = 0; e < ch_data->bs_num_env; e++) {
407
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 5588 int delta = !((e == e_a[1]) || (e == e_a[0]));
408
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 23292 for (k = 0; k < sbr->n_lim; k++) {
409 SoftFloat gain_boost, gain_max;
410 SoftFloat sum[2];
411 17704 sum[0] = sum[1] = FLOAT_0;
412
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 145541 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
413 127837 const SoftFloat temp = av_div_sf(sbr->e_origmapped[e][m],
414 av_add_sf(FLOAT_1, sbr->q_mapped[e][m]));
415 127837 sbr->q_m[e][m] = av_sqrt_sf(av_mul_sf(temp, sbr->q_mapped[e][m]));
416 127837 sbr->s_m[e][m] = av_sqrt_sf(av_mul_sf(temp, av_int2sf(ch_data->s_indexmapped[e + 1][m], 0)));
417
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 127837 if (!sbr->s_mapped[e][m]) {
418
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 123205 if (delta) {
419 115357 sbr->gain[e][m] = av_sqrt_sf(av_div_sf(sbr->e_origmapped[e][m],
420 av_mul_sf(av_add_sf(FLOAT_1, sbr->e_curr[e][m]),
421 av_add_sf(FLOAT_1, sbr->q_mapped[e][m]))));
422 } else {
423 7848 sbr->gain[e][m] = av_sqrt_sf(av_div_sf(sbr->e_origmapped[e][m],
424 av_add_sf(FLOAT_1, sbr->e_curr[e][m])));
425 }
426 } else {
427 4632 sbr->gain[e][m] = av_sqrt_sf(
428 av_div_sf(
429 av_mul_sf(sbr->e_origmapped[e][m], sbr->q_mapped[e][m]),
430 av_mul_sf(
431 av_add_sf(FLOAT_1, sbr->e_curr[e][m]),
432 av_add_sf(FLOAT_1, sbr->q_mapped[e][m]))));
433 }
434 127837 sbr->gain[e][m] = av_add_sf(sbr->gain[e][m], FLOAT_MIN);
435 }
436
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 145541 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
437 127837 sum[0] = av_add_sf(sum[0], sbr->e_origmapped[e][m]);
438 127837 sum[1] = av_add_sf(sum[1], sbr->e_curr[e][m]);
439 }
440 17704 gain_max = av_mul_sf(limgain[sbr->bs_limiter_gains],
441 av_sqrt_sf(
442 av_div_sf(
443 av_add_sf(FLOAT_EPSILON, sum[0]),
444 av_add_sf(FLOAT_EPSILON, sum[1]))));
445
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 17704 if (av_gt_sf(gain_max, FLOAT_100000))
446 3741 gain_max = FLOAT_100000;
447
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 145541 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
448 127837 SoftFloat q_m_max = av_div_sf(
449 av_mul_sf(sbr->q_m[e][m], gain_max),
450 sbr->gain[e][m]);
451
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 127837 if (av_gt_sf(sbr->q_m[e][m], q_m_max))
452 33576 sbr->q_m[e][m] = q_m_max;
453
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 127837 if (av_gt_sf(sbr->gain[e][m], gain_max))
454 33576 sbr->gain[e][m] = gain_max;
455 }
456 17704 sum[0] = sum[1] = FLOAT_0;
457
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 145541 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
458 127837 sum[0] = av_add_sf(sum[0], sbr->e_origmapped[e][m]);
459 127837 sum[1] = av_add_sf(sum[1],
460 av_mul_sf(
461 av_mul_sf(sbr->e_curr[e][m],
462 sbr->gain[e][m]),
463 sbr->gain[e][m]));
464 127837 sum[1] = av_add_sf(sum[1],
465 av_mul_sf(sbr->s_m[e][m], sbr->s_m[e][m]));
466
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 127837 if (delta && !sbr->s_m[e][m].mant)
467 117689 sum[1] = av_add_sf(sum[1],
468 av_mul_sf(sbr->q_m[e][m], sbr->q_m[e][m]));
469 }
470 17704 gain_boost = av_sqrt_sf(
471 av_div_sf(
472 av_add_sf(FLOAT_EPSILON, sum[0]),
473 av_add_sf(FLOAT_EPSILON, sum[1])));
474
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 17704 if (av_gt_sf(gain_boost, FLOAT_1584893192))
475 1483 gain_boost = FLOAT_1584893192;
476
477
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 145541 for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {
478 127837 sbr->gain[e][m] = av_mul_sf(sbr->gain[e][m], gain_boost);
479 127837 sbr->q_m[e][m] = av_mul_sf(sbr->q_m[e][m], gain_boost);
480 127837 sbr->s_m[e][m] = av_mul_sf(sbr->s_m[e][m], gain_boost);
481 }
482 }
483 }
484 3787 }
485
486 /// Assembling HF Signals (14496-3 sp04 p220)
487 3787 static void sbr_hf_assemble(int Y1[38][64][2],
488 const int X_high[64][40][2],
489 SpectralBandReplication *sbr, SBRData *ch_data,
490 const int e_a[2])
491 {
492 int e, i, j, m;
493
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 3787 const int h_SL = 4 * !sbr->bs_smoothing_mode;
494 3787 const int kx = sbr->kx[1];
495 3787 const int m_max = sbr->m[1];
496 static const SoftFloat h_smooth[5] = {
497 { 715827883, -1 },
498 { 647472402, -1 },
499 { 937030863, -2 },
500 { 989249804, -3 },
501 { 546843842, -4 },
502 };
503 3787 SoftFloat (*g_temp)[48] = ch_data->g_temp, (*q_temp)[48] = ch_data->q_temp;
504 3787 int indexnoise = ch_data->f_indexnoise;
505 3787 int indexsine = ch_data->f_indexsine;
506
507
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 3787 if (sbr->reset) {
508
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 17 for (i = 0; i < h_SL; i++) {
509 8 memcpy(g_temp[i + 2*ch_data->t_env[0]], sbr->gain[0], m_max * sizeof(sbr->gain[0][0]));
510 8 memcpy(q_temp[i + 2*ch_data->t_env[0]], sbr->q_m[0], m_max * sizeof(sbr->q_m[0][0]));
511 }
512
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 3778 } else if (h_SL) {
513
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 5730 for (i = 0; i < 4; i++) {
514 4584 memcpy(g_temp[i + 2 * ch_data->t_env[0]],
515 4584 g_temp[i + 2 * ch_data->t_env_num_env_old],
516 sizeof(g_temp[0]));
517 4584 memcpy(q_temp[i + 2 * ch_data->t_env[0]],
518 4584 q_temp[i + 2 * ch_data->t_env_num_env_old],
519 sizeof(q_temp[0]));
520 }
521 }
522
523
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 9375 for (e = 0; e < ch_data->bs_num_env; e++) {
524
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 126772 for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) {
525 121184 memcpy(g_temp[h_SL + i], sbr->gain[e], m_max * sizeof(sbr->gain[0][0]));
526 121184 memcpy(q_temp[h_SL + i], sbr->q_m[e], m_max * sizeof(sbr->q_m[0][0]));
527 }
528 }
529
530
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 9375 for (e = 0; e < ch_data->bs_num_env; e++) {
531
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 126772 for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) {
532 SoftFloat g_filt_tab[48];
533 SoftFloat q_filt_tab[48];
534 SoftFloat *g_filt, *q_filt;
535
536
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 121184 if (h_SL && e != e_a[0] && e != e_a[1]) {
537 36634 g_filt = g_filt_tab;
538 36634 q_filt = q_filt_tab;
539
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 659412 for (m = 0; m < m_max; m++) {
540 622778 const int idx1 = i + h_SL;
541 622778 g_filt[m].mant = g_filt[m].exp = 0;
542 622778 q_filt[m].mant = q_filt[m].exp = 0;
543
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 3736668 for (j = 0; j <= h_SL; j++) {
544 3113890 g_filt[m] = av_add_sf(g_filt[m],
545 3113890 av_mul_sf(g_temp[idx1 - j][m],
546 h_smooth[j]));
547 3113890 q_filt[m] = av_add_sf(q_filt[m],
548 3113890 av_mul_sf(q_temp[idx1 - j][m],
549 h_smooth[j]));
550 }
551 }
552 } else {
553 84550 g_filt = g_temp[i + h_SL];
554 84550 q_filt = q_temp[i];
555 }
556
557 121184 sbr->dsp.hf_g_filt(Y1[i] + kx, X_high + kx, g_filt, m_max,
558 121184 i + ENVELOPE_ADJUSTMENT_OFFSET);
559
560
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 121184 if (e != e_a[0] && e != e_a[1]) {
561 119686 sbr->dsp.hf_apply_noise[indexsine](Y1[i] + kx, sbr->s_m[e],
562 q_filt, indexnoise,
563 kx, m_max);
564 } else {
565 1498 int idx = indexsine&1;
566 1498 int A = (1-((indexsine+(kx & 1))&2));
567 1498 int B = (A^(-idx)) + idx;
568 1498 unsigned *out = &Y1[i][kx][idx];
569 int shift;
570 unsigned round;
571
572 1498 SoftFloat *in = sbr->s_m[e];
573
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 18898 for (m = 0; m+1 < m_max; m+=2) {
574 int shift2;
575 17400 shift = 22 - in[m ].exp;
576 17400 shift2= 22 - in[m+1].exp;
577
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 17400 if (shift < 1 || shift2 < 1) {
578 ✗ av_log(NULL, AV_LOG_ERROR, "Overflow in sbr_hf_assemble, shift=%d,%d\n", shift, shift2);
579 ✗ return;
580 }
581
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 17400 if (shift < 32) {
582 600 round = 1 << (shift-1);
583 600 out[2*m ] += (int)(in[m ].mant * A + round) >> shift;
584 }
585
586
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 17400 if (shift2 < 32) {
587 152 round = 1 << (shift2-1);
588 152 out[2*m+2] += (int)(in[m+1].mant * B + round) >> shift2;
589 }
590 }
591
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 1498 if(m_max&1)
592 {
593 1004 shift = 22 - in[m ].exp;
594
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 1004 if (shift < 1) {
595 ✗ av_log(NULL, AV_LOG_ERROR, "Overflow in sbr_hf_assemble, shift=%d\n", shift);
596 ✗ return;
597
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 1004 } else if (shift < 32) {
598 ✗ round = 1 << (shift-1);
599 ✗ out[2*m ] += (int)(in[m ].mant * A + round) >> shift;
600 }
601 }
602 }
603 121184 indexnoise = (indexnoise + m_max) & 0x1ff;
604 121184 indexsine = (indexsine + 1) & 3;
605 }
606 }
607 3787 ch_data->f_indexnoise = indexnoise;
608 3787 ch_data->f_indexsine = indexsine;
609 }
610
611 #include "aacsbr_template.c"
612