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avformat/mpeg: demux ivtv captions
[ffmpeg.git] / libavcodec / aacps.c
blob6008edd332f6ac5dfeccc2a9845398aa240d12d4
1 /*
2 * MPEG-4 Parametric Stereo decoding functions
3 * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 * Note: Rounding-to-nearest used unless otherwise stated
22 *
23 */
24
25 #include <stdint.h>
26 #include "libavutil/common.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/mem_internal.h"
29 #include "aacps.h"
30 #if USE_FIXED
31 #include "aacps_fixed_tablegen.h"
32 #else
33 #include "libavutil/internal.h"
34 #include "aacps_tablegen.h"
35 #endif /* USE_FIXED */
36
37 static const INTFLOAT g1_Q2[] = {
38 Q31(0.0f), Q31(0.01899487526049f), Q31(0.0f), Q31(-0.07293139167538f),
39 Q31(0.0f), Q31(0.30596630545168f), Q31(0.5f)
40 };
41
42 static void ipdopd_reset(int8_t *ipd_hist, int8_t *opd_hist)
43 {
44 int i;
45 for (i = 0; i < PS_MAX_NR_IPDOPD; i++) {
46 opd_hist[i] = 0;
47 ipd_hist[i] = 0;
48 }
49 }
50
51 /** Split one subband into 2 subsubbands with a symmetric real filter.
52 * The filter must have its non-center even coefficients equal to zero. */
53 static void hybrid2_re(INTFLOAT (*in)[2], INTFLOAT (*out)[32][2],
54 const INTFLOAT filter[7], int len, int reverse)
55 {
56 int i, j;
57 for (i = 0; i < len; i++, in++) {
58 INT64FLOAT re_in = AAC_MUL31(filter[6], in[6][0]); //real inphase
59 INT64FLOAT re_op = 0.0f; //real out of phase
60 INT64FLOAT im_in = AAC_MUL31(filter[6], in[6][1]); //imag inphase
61 INT64FLOAT im_op = 0.0f; //imag out of phase
62 for (j = 0; j < 6; j += 2) {
63 re_op += (INT64FLOAT)filter[j+1] * (in[j+1][0] + in[12-j-1][0]);
64 im_op += (INT64FLOAT)filter[j+1] * (in[j+1][1] + in[12-j-1][1]);
65 }
66
67 #if USE_FIXED
68 re_op = (re_op + 0x40000000) >> 31;
69 im_op = (im_op + 0x40000000) >> 31;
70 #endif /* USE_FIXED */
71
72 out[ reverse][i][0] = (INTFLOAT)(re_in + re_op);
73 out[ reverse][i][1] = (INTFLOAT)(im_in + im_op);
74 out[!reverse][i][0] = (INTFLOAT)(re_in - re_op);
75 out[!reverse][i][1] = (INTFLOAT)(im_in - im_op);
76 }
77 }
78
79 /** Split one subband into 6 subsubbands with a complex filter */
80 static void hybrid6_cx(PSDSPContext *dsp, INTFLOAT (*in)[2], INTFLOAT (*out)[32][2],
81 TABLE_CONST INTFLOAT (*filter)[8][2], int len)
82 {
83 int i;
84 int N = 8;
85 LOCAL_ALIGNED_16(INTFLOAT, temp, [8], [2]);
86
87 for (i = 0; i < len; i++, in++) {
88 dsp->hybrid_analysis(temp, in, (const INTFLOAT (*)[8][2]) filter, 1, N);
89 out[0][i][0] = temp[6][0];
90 out[0][i][1] = temp[6][1];
91 out[1][i][0] = temp[7][0];
92 out[1][i][1] = temp[7][1];
93 out[2][i][0] = temp[0][0];
94 out[2][i][1] = temp[0][1];
95 out[3][i][0] = temp[1][0];
96 out[3][i][1] = temp[1][1];
97 out[4][i][0] = temp[2][0] + temp[5][0];
98 out[4][i][1] = temp[2][1] + temp[5][1];
99 out[5][i][0] = temp[3][0] + temp[4][0];
100 out[5][i][1] = temp[3][1] + temp[4][1];
101 }
102 }
103
104 static void hybrid4_8_12_cx(PSDSPContext *dsp,
105 INTFLOAT (*in)[2], INTFLOAT (*out)[32][2],
106 TABLE_CONST INTFLOAT (*filter)[8][2], int N, int len)
107 {
108 int i;
109
110 for (i = 0; i < len; i++, in++) {
111 dsp->hybrid_analysis(out[0] + i, in, (const INTFLOAT (*)[8][2]) filter, 32, N);
112 }
113 }
114
115 static void hybrid_analysis(PSDSPContext *dsp, INTFLOAT out[91][32][2],
116 INTFLOAT in[5][44][2], INTFLOAT L[2][38][64],
117 int is34, int len)
118 {
119 int i, j;
120 for (i = 0; i < 5; i++) {
121 for (j = 0; j < 38; j++) {
122 in[i][j+6][0] = L[0][j][i];
123 in[i][j+6][1] = L[1][j][i];
124 }
125 }
126 if (is34) {
127 hybrid4_8_12_cx(dsp, in[0], out, f34_0_12, 12, len);
128 hybrid4_8_12_cx(dsp, in[1], out+12, f34_1_8, 8, len);
129 hybrid4_8_12_cx(dsp, in[2], out+20, f34_2_4, 4, len);
130 hybrid4_8_12_cx(dsp, in[3], out+24, f34_2_4, 4, len);
131 hybrid4_8_12_cx(dsp, in[4], out+28, f34_2_4, 4, len);
132 dsp->hybrid_analysis_ileave(out + 27, L, 5, len);
133 } else {
134 hybrid6_cx(dsp, in[0], out, f20_0_8, len);
135 hybrid2_re(in[1], out+6, g1_Q2, len, 1);
136 hybrid2_re(in[2], out+8, g1_Q2, len, 0);
137 dsp->hybrid_analysis_ileave(out + 7, L, 3, len);
138 }
139 //update in_buf
140 for (i = 0; i < 5; i++) {
141 memcpy(in[i], in[i]+32, 6 * sizeof(in[i][0]));
142 }
143 }
144
145 static void hybrid_synthesis(PSDSPContext *dsp, INTFLOAT out[2][38][64],
146 INTFLOAT in[91][32][2], int is34, int len)
147 {
148 int i, n;
149 if (is34) {
150 for (n = 0; n < len; n++) {
151 memset(out[0][n], 0, 5*sizeof(out[0][n][0]));
152 memset(out[1][n], 0, 5*sizeof(out[1][n][0]));
153 for (i = 0; i < 12; i++) {
154 out[0][n][0] += (UINTFLOAT)in[ i][n][0];
155 out[1][n][0] += (UINTFLOAT)in[ i][n][1];
156 }
157 for (i = 0; i < 8; i++) {
158 out[0][n][1] += (UINTFLOAT)in[12+i][n][0];
159 out[1][n][1] += (UINTFLOAT)in[12+i][n][1];
160 }
161 for (i = 0; i < 4; i++) {
162 out[0][n][2] += (UINTFLOAT)in[20+i][n][0];
163 out[1][n][2] += (UINTFLOAT)in[20+i][n][1];
164 out[0][n][3] += (UINTFLOAT)in[24+i][n][0];
165 out[1][n][3] += (UINTFLOAT)in[24+i][n][1];
166 out[0][n][4] += (UINTFLOAT)in[28+i][n][0];
167 out[1][n][4] += (UINTFLOAT)in[28+i][n][1];
168 }
169 }
170 dsp->hybrid_synthesis_deint(out, in + 27, 5, len);
171 } else {
172 for (n = 0; n < len; n++) {
173 out[0][n][0] = (UINTFLOAT)in[0][n][0] + in[1][n][0] + in[2][n][0] +
174 (UINTFLOAT)in[3][n][0] + in[4][n][0] + in[5][n][0];
175 out[1][n][0] = (UINTFLOAT)in[0][n][1] + in[1][n][1] + in[2][n][1] +
176 (UINTFLOAT)in[3][n][1] + in[4][n][1] + in[5][n][1];
177 out[0][n][1] = (UINTFLOAT)in[6][n][0] + in[7][n][0];
178 out[1][n][1] = (UINTFLOAT)in[6][n][1] + in[7][n][1];
179 out[0][n][2] = (UINTFLOAT)in[8][n][0] + in[9][n][0];
180 out[1][n][2] = (UINTFLOAT)in[8][n][1] + in[9][n][1];
181 }
182 dsp->hybrid_synthesis_deint(out, in + 7, 3, len);
183 }
184 }
185
186 /// All-pass filter decay slope
187 #define DECAY_SLOPE Q30(0.05f)
188 /// Number of frequency bands that can be addressed by the parameter index, b(k)
189 static const int NR_PAR_BANDS[] = { 20, 34 };
190 static const int NR_IPDOPD_BANDS[] = { 11, 17 };
191 /// Number of frequency bands that can be addressed by the sub subband index, k
192 static const int NR_BANDS[] = { 71, 91 };
193 /// Start frequency band for the all-pass filter decay slope
194 static const int DECAY_CUTOFF[] = { 10, 32 };
195 /// Number of all-pass filer bands
196 static const int NR_ALLPASS_BANDS[] = { 30, 50 };
197 /// First stereo band using the short one sample delay
198 static const int SHORT_DELAY_BAND[] = { 42, 62 };
199
200 /** Table 8.46 */
201 static void map_idx_10_to_20(int8_t *par_mapped, const int8_t *par, int full)
202 {
203 int b;
204 if (full)
205 b = 9;
206 else {
207 b = 4;
208 par_mapped[10] = 0;
209 }
210 for (; b >= 0; b--) {
211 par_mapped[2*b+1] = par_mapped[2*b] = par[b];
212 }
213 }
214
215 static void map_idx_34_to_20(int8_t *par_mapped, const int8_t *par, int full)
216 {
217 par_mapped[ 0] = (2*par[ 0] + par[ 1]) / 3;
218 par_mapped[ 1] = ( par[ 1] + 2*par[ 2]) / 3;
219 par_mapped[ 2] = (2*par[ 3] + par[ 4]) / 3;
220 par_mapped[ 3] = ( par[ 4] + 2*par[ 5]) / 3;
221 par_mapped[ 4] = ( par[ 6] + par[ 7]) / 2;
222 par_mapped[ 5] = ( par[ 8] + par[ 9]) / 2;
223 par_mapped[ 6] = par[10];
224 par_mapped[ 7] = par[11];
225 par_mapped[ 8] = ( par[12] + par[13]) / 2;
226 par_mapped[ 9] = ( par[14] + par[15]) / 2;
227 par_mapped[10] = par[16];
228 if (full) {
229 par_mapped[11] = par[17];
230 par_mapped[12] = par[18];
231 par_mapped[13] = par[19];
232 par_mapped[14] = ( par[20] + par[21]) / 2;
233 par_mapped[15] = ( par[22] + par[23]) / 2;
234 par_mapped[16] = ( par[24] + par[25]) / 2;
235 par_mapped[17] = ( par[26] + par[27]) / 2;
236 par_mapped[18] = ( par[28] + par[29] + par[30] + par[31]) / 4;
237 par_mapped[19] = ( par[32] + par[33]) / 2;
238 }
239 }
240
241 static void map_val_34_to_20(INTFLOAT par[PS_MAX_NR_IIDICC])
242 {
243 #if USE_FIXED
244 par[ 0] = (int)(((int64_t)(par[ 0] + (unsigned)(par[ 1]>>1)) * 1431655765 + \
245 0x40000000) >> 31);
246 par[ 1] = (int)(((int64_t)((par[ 1]>>1) + (unsigned)par[ 2]) * 1431655765 + \
247 0x40000000) >> 31);
248 par[ 2] = (int)(((int64_t)(par[ 3] + (unsigned)(par[ 4]>>1)) * 1431655765 + \
249 0x40000000) >> 31);
250 par[ 3] = (int)(((int64_t)((par[ 4]>>1) + (unsigned)par[ 5]) * 1431655765 + \
251 0x40000000) >> 31);
252 #else
253 par[ 0] = (2*par[ 0] + par[ 1]) * 0.33333333f;
254 par[ 1] = ( par[ 1] + 2*par[ 2]) * 0.33333333f;
255 par[ 2] = (2*par[ 3] + par[ 4]) * 0.33333333f;
256 par[ 3] = ( par[ 4] + 2*par[ 5]) * 0.33333333f;
257 #endif /* USE_FIXED */
258 par[ 4] = AAC_HALF_SUM(par[ 6], par[ 7]);
259 par[ 5] = AAC_HALF_SUM(par[ 8], par[ 9]);
260 par[ 6] = par[10];
261 par[ 7] = par[11];
262 par[ 8] = AAC_HALF_SUM(par[12], par[13]);
263 par[ 9] = AAC_HALF_SUM(par[14], par[15]);
264 par[10] = par[16];
265 par[11] = par[17];
266 par[12] = par[18];
267 par[13] = par[19];
268 par[14] = AAC_HALF_SUM(par[20], par[21]);
269 par[15] = AAC_HALF_SUM(par[22], par[23]);
270 par[16] = AAC_HALF_SUM(par[24], par[25]);
271 par[17] = AAC_HALF_SUM(par[26], par[27]);
272 #if USE_FIXED
273 par[18] = (((par[28]+2)>>2) + ((par[29]+2)>>2) + ((par[30]+2)>>2) + ((par[31]+2)>>2));
274 #else
275 par[18] = ( par[28] + par[29] + par[30] + par[31]) * 0.25f;
276 #endif /* USE_FIXED */
277 par[19] = AAC_HALF_SUM(par[32], par[33]);
278 }
279
280 static void map_idx_10_to_34(int8_t *par_mapped, const int8_t *par, int full)
281 {
282 if (full) {
283 par_mapped[33] = par[9];
284 par_mapped[32] = par[9];
285 par_mapped[31] = par[9];
286 par_mapped[30] = par[9];
287 par_mapped[29] = par[9];
288 par_mapped[28] = par[9];
289 par_mapped[27] = par[8];
290 par_mapped[26] = par[8];
291 par_mapped[25] = par[8];
292 par_mapped[24] = par[8];
293 par_mapped[23] = par[7];
294 par_mapped[22] = par[7];
295 par_mapped[21] = par[7];
296 par_mapped[20] = par[7];
297 par_mapped[19] = par[6];
298 par_mapped[18] = par[6];
299 par_mapped[17] = par[5];
300 par_mapped[16] = par[5];
301 } else {
302 par_mapped[16] = 0;
303 }
304 par_mapped[15] = par[4];
305 par_mapped[14] = par[4];
306 par_mapped[13] = par[4];
307 par_mapped[12] = par[4];
308 par_mapped[11] = par[3];
309 par_mapped[10] = par[3];
310 par_mapped[ 9] = par[2];
311 par_mapped[ 8] = par[2];
312 par_mapped[ 7] = par[2];
313 par_mapped[ 6] = par[2];
314 par_mapped[ 5] = par[1];
315 par_mapped[ 4] = par[1];
316 par_mapped[ 3] = par[1];
317 par_mapped[ 2] = par[0];
318 par_mapped[ 1] = par[0];
319 par_mapped[ 0] = par[0];
320 }
321
322 static void map_idx_20_to_34(int8_t *par_mapped, const int8_t *par, int full)
323 {
324 if (full) {
325 par_mapped[33] = par[19];
326 par_mapped[32] = par[19];
327 par_mapped[31] = par[18];
328 par_mapped[30] = par[18];
329 par_mapped[29] = par[18];
330 par_mapped[28] = par[18];
331 par_mapped[27] = par[17];
332 par_mapped[26] = par[17];
333 par_mapped[25] = par[16];
334 par_mapped[24] = par[16];
335 par_mapped[23] = par[15];
336 par_mapped[22] = par[15];
337 par_mapped[21] = par[14];
338 par_mapped[20] = par[14];
339 par_mapped[19] = par[13];
340 par_mapped[18] = par[12];
341 par_mapped[17] = par[11];
342 }
343 par_mapped[16] = par[10];
344 par_mapped[15] = par[ 9];
345 par_mapped[14] = par[ 9];
346 par_mapped[13] = par[ 8];
347 par_mapped[12] = par[ 8];
348 par_mapped[11] = par[ 7];
349 par_mapped[10] = par[ 6];
350 par_mapped[ 9] = par[ 5];
351 par_mapped[ 8] = par[ 5];
352 par_mapped[ 7] = par[ 4];
353 par_mapped[ 6] = par[ 4];
354 par_mapped[ 5] = par[ 3];
355 par_mapped[ 4] = (par[ 2] + par[ 3]) / 2;
356 par_mapped[ 3] = par[ 2];
357 par_mapped[ 2] = par[ 1];
358 par_mapped[ 1] = (par[ 0] + par[ 1]) / 2;
359 par_mapped[ 0] = par[ 0];
360 }
361
362 static void map_val_20_to_34(INTFLOAT par[PS_MAX_NR_IIDICC])
363 {
364 par[33] = par[19];
365 par[32] = par[19];
366 par[31] = par[18];
367 par[30] = par[18];
368 par[29] = par[18];
369 par[28] = par[18];
370 par[27] = par[17];
371 par[26] = par[17];
372 par[25] = par[16];
373 par[24] = par[16];
374 par[23] = par[15];
375 par[22] = par[15];
376 par[21] = par[14];
377 par[20] = par[14];
378 par[19] = par[13];
379 par[18] = par[12];
380 par[17] = par[11];
381 par[16] = par[10];
382 par[15] = par[ 9];
383 par[14] = par[ 9];
384 par[13] = par[ 8];
385 par[12] = par[ 8];
386 par[11] = par[ 7];
387 par[10] = par[ 6];
388 par[ 9] = par[ 5];
389 par[ 8] = par[ 5];
390 par[ 7] = par[ 4];
391 par[ 6] = par[ 4];
392 par[ 5] = par[ 3];
393 par[ 4] = AAC_HALF_SUM(par[ 2], par[ 3]);
394 par[ 3] = par[ 2];
395 par[ 2] = par[ 1];
396 par[ 1] = AAC_HALF_SUM(par[ 0], par[ 1]);
397 }
398
399 static void decorrelation(PSContext *ps, INTFLOAT (*out)[32][2], const INTFLOAT (*s)[32][2], int is34)
400 {
401 LOCAL_ALIGNED_16(INTFLOAT, power, [34], [PS_QMF_TIME_SLOTS]);
402 LOCAL_ALIGNED_16(INTFLOAT, transient_gain, [34], [PS_QMF_TIME_SLOTS]);
403 INTFLOAT *peak_decay_nrg = ps->peak_decay_nrg;
404 INTFLOAT *power_smooth = ps->power_smooth;
405 INTFLOAT *peak_decay_diff_smooth = ps->peak_decay_diff_smooth;
406 INTFLOAT (*delay)[PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2] = ps->delay;
407 INTFLOAT (*ap_delay)[PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2] = ps->ap_delay;
408 #if !USE_FIXED
409 const float transient_impact = 1.5f;
410 const float a_smooth = 0.25f; ///< Smoothing coefficient
411 #endif /* USE_FIXED */
412 const int8_t *const k_to_i = is34 ? ff_k_to_i_34 : ff_k_to_i_20;
413 int i, k, m, n;
414 int n0 = 0, nL = 32;
415 const INTFLOAT peak_decay_factor = Q31(0.76592833836465f);
416
417 memset(power, 0, 34 * sizeof(*power));
418
419 if (is34 != ps->common.is34bands_old) {
420 memset(ps->peak_decay_nrg, 0, sizeof(ps->peak_decay_nrg));
421 memset(ps->power_smooth, 0, sizeof(ps->power_smooth));
422 memset(ps->peak_decay_diff_smooth, 0, sizeof(ps->peak_decay_diff_smooth));
423 memset(ps->delay, 0, sizeof(ps->delay));
424 memset(ps->ap_delay, 0, sizeof(ps->ap_delay));
425 }
426
427 for (k = 0; k < NR_BANDS[is34]; k++) {
428 int i = k_to_i[k];
429 ps->dsp.add_squares(power[i], s[k], nL - n0);
430 }
431
432 //Transient detection
433 #if USE_FIXED
434 for (i = 0; i < NR_PAR_BANDS[is34]; i++) {
435 for (n = n0; n < nL; n++) {
436 int decayed_peak;
437 decayed_peak = (int)(((int64_t)peak_decay_factor * \
438 peak_decay_nrg[i] + 0x40000000) >> 31);
439 peak_decay_nrg[i] = FFMAX(decayed_peak, power[i][n]);
440 power_smooth[i] += (power[i][n] + 2LL - power_smooth[i]) >> 2;
441 peak_decay_diff_smooth[i] += (peak_decay_nrg[i] + 2LL - power[i][n] - \
442 peak_decay_diff_smooth[i]) >> 2;
443
444 if (peak_decay_diff_smooth[i]) {
445 transient_gain[i][n] = FFMIN(power_smooth[i]*43691LL / peak_decay_diff_smooth[i], 1<<16);
446 } else
447 transient_gain[i][n] = 1 << 16;
448 }
449 }
450 #else
451 for (i = 0; i < NR_PAR_BANDS[is34]; i++) {
452 for (n = n0; n < nL; n++) {
453 float decayed_peak = peak_decay_factor * peak_decay_nrg[i];
454 float denom;
455 peak_decay_nrg[i] = FFMAX(decayed_peak, power[i][n]);
456 power_smooth[i] += a_smooth * (power[i][n] - power_smooth[i]);
457 peak_decay_diff_smooth[i] += a_smooth * (peak_decay_nrg[i] - power[i][n] - peak_decay_diff_smooth[i]);
458 denom = transient_impact * peak_decay_diff_smooth[i];
459 transient_gain[i][n] = (denom > power_smooth[i]) ?
460 power_smooth[i] / denom : 1.0f;
461 }
462 }
463
464 #endif /* USE_FIXED */
465 //Decorrelation and transient reduction
466 // PS_AP_LINKS - 1
467 // -----
468 // | | Q_fract_allpass[k][m]*z^-link_delay[m] - a[m]*g_decay_slope[k]
469 //H[k][z] = z^-2 * phi_fract[k] * | | ----------------------------------------------------------------
470 // | | 1 - a[m]*g_decay_slope[k]*Q_fract_allpass[k][m]*z^-link_delay[m]
471 // m = 0
472 //d[k][z] (out) = transient_gain_mapped[k][z] * H[k][z] * s[k][z]
473 for (k = 0; k < NR_ALLPASS_BANDS[is34]; k++) {
474 int b = k_to_i[k];
475 #if USE_FIXED
476 int g_decay_slope;
477
478 if (k - DECAY_CUTOFF[is34] <= 0) {
479 g_decay_slope = 1 << 30;
480 }
481 else if (k - DECAY_CUTOFF[is34] >= 20) {
482 g_decay_slope = 0;
483 }
484 else {
485 g_decay_slope = (1 << 30) - DECAY_SLOPE * (k - DECAY_CUTOFF[is34]);
486 }
487 #else
488 float g_decay_slope = 1.f - DECAY_SLOPE * (k - DECAY_CUTOFF[is34]);
489 g_decay_slope = av_clipf(g_decay_slope, 0.f, 1.f);
490 #endif /* USE_FIXED */
491 memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));
492 memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));
493 for (m = 0; m < PS_AP_LINKS; m++) {
494 memcpy(ap_delay[k][m], ap_delay[k][m]+numQMFSlots, 5*sizeof(ap_delay[k][m][0]));
495 }
496 ps->dsp.decorrelate(out[k], delay[k] + PS_MAX_DELAY - 2, ap_delay[k],
497 phi_fract[is34][k],
498 (const INTFLOAT (*)[2]) Q_fract_allpass[is34][k],
499 transient_gain[b], g_decay_slope, nL - n0);
500 }
501 for (; k < SHORT_DELAY_BAND[is34]; k++) {
502 int i = k_to_i[k];
503 memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));
504 memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));
505 //H = delay 14
506 ps->dsp.mul_pair_single(out[k], delay[k] + PS_MAX_DELAY - 14,
507 transient_gain[i], nL - n0);
508 }
509 for (; k < NR_BANDS[is34]; k++) {
510 int i = k_to_i[k];
511 memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));
512 memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));
513 //H = delay 1
514 ps->dsp.mul_pair_single(out[k], delay[k] + PS_MAX_DELAY - 1,
515 transient_gain[i], nL - n0);
516 }
517 }
518
519 static void remap34(int8_t (**p_par_mapped)[PS_MAX_NR_IIDICC],
520 int8_t (*par)[PS_MAX_NR_IIDICC],
521 int num_par, int num_env, int full)
522 {
523 int8_t (*par_mapped)[PS_MAX_NR_IIDICC] = *p_par_mapped;
524 int e;
525 if (num_par == 20 || num_par == 11) {
526 for (e = 0; e < num_env; e++) {
527 map_idx_20_to_34(par_mapped[e], par[e], full);
528 }
529 } else if (num_par == 10 || num_par == 5) {
530 for (e = 0; e < num_env; e++) {
531 map_idx_10_to_34(par_mapped[e], par[e], full);
532 }
533 } else {
534 *p_par_mapped = par;
535 }
536 }
537
538 static void remap20(int8_t (**p_par_mapped)[PS_MAX_NR_IIDICC],
539 int8_t (*par)[PS_MAX_NR_IIDICC],
540 int num_par, int num_env, int full)
541 {
542 int8_t (*par_mapped)[PS_MAX_NR_IIDICC] = *p_par_mapped;
543 int e;
544 if (num_par == 34 || num_par == 17) {
545 for (e = 0; e < num_env; e++) {
546 map_idx_34_to_20(par_mapped[e], par[e], full);
547 }
548 } else if (num_par == 10 || num_par == 5) {
549 for (e = 0; e < num_env; e++) {
550 map_idx_10_to_20(par_mapped[e], par[e], full);
551 }
552 } else {
553 *p_par_mapped = par;
554 }
555 }
556
557 static void stereo_processing(PSContext *ps, INTFLOAT (*l)[32][2], INTFLOAT (*r)[32][2], int is34)
558 {
559 int e, b, k;
560
561 PSCommonContext *const ps2 = &ps->common;
562 INTFLOAT (*H11)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H11;
563 INTFLOAT (*H12)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H12;
564 INTFLOAT (*H21)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H21;
565 INTFLOAT (*H22)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H22;
566 int8_t *opd_hist = ps->opd_hist;
567 int8_t *ipd_hist = ps->ipd_hist;
568 int8_t iid_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
569 int8_t icc_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
570 int8_t ipd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
571 int8_t opd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
572 int8_t (*iid_mapped)[PS_MAX_NR_IIDICC] = iid_mapped_buf;
573 int8_t (*icc_mapped)[PS_MAX_NR_IIDICC] = icc_mapped_buf;
574 int8_t (*ipd_mapped)[PS_MAX_NR_IIDICC] = ipd_mapped_buf;
575 int8_t (*opd_mapped)[PS_MAX_NR_IIDICC] = opd_mapped_buf;
576 const int8_t *const k_to_i = is34 ? ff_k_to_i_34 : ff_k_to_i_20;
577 TABLE_CONST INTFLOAT (*H_LUT)[8][4] = (PS_BASELINE || ps2->icc_mode < 3) ? HA : HB;
578
579 //Remapping
580 if (ps2->num_env_old) {
581 memcpy(H11[0][0], H11[0][ps2->num_env_old], sizeof(H11[0][0]));
582 memcpy(H11[1][0], H11[1][ps2->num_env_old], sizeof(H11[1][0]));
583 memcpy(H12[0][0], H12[0][ps2->num_env_old], sizeof(H12[0][0]));
584 memcpy(H12[1][0], H12[1][ps2->num_env_old], sizeof(H12[1][0]));
585 memcpy(H21[0][0], H21[0][ps2->num_env_old], sizeof(H21[0][0]));
586 memcpy(H21[1][0], H21[1][ps2->num_env_old], sizeof(H21[1][0]));
587 memcpy(H22[0][0], H22[0][ps2->num_env_old], sizeof(H22[0][0]));
588 memcpy(H22[1][0], H22[1][ps2->num_env_old], sizeof(H22[1][0]));
589 }
590
591 if (is34) {
592 remap34(&iid_mapped, ps2->iid_par, ps2->nr_iid_par, ps2->num_env, 1);
593 remap34(&icc_mapped, ps2->icc_par, ps2->nr_icc_par, ps2->num_env, 1);
594 if (ps2->enable_ipdopd) {
595 remap34(&ipd_mapped, ps2->ipd_par, ps2->nr_ipdopd_par, ps2->num_env, 0);
596 remap34(&opd_mapped, ps2->opd_par, ps2->nr_ipdopd_par, ps2->num_env, 0);
597 }
598 if (!ps2->is34bands_old) {
599 map_val_20_to_34(H11[0][0]);
600 map_val_20_to_34(H11[1][0]);
601 map_val_20_to_34(H12[0][0]);
602 map_val_20_to_34(H12[1][0]);
603 map_val_20_to_34(H21[0][0]);
604 map_val_20_to_34(H21[1][0]);
605 map_val_20_to_34(H22[0][0]);
606 map_val_20_to_34(H22[1][0]);
607 ipdopd_reset(ipd_hist, opd_hist);
608 }
609 } else {
610 remap20(&iid_mapped, ps2->iid_par, ps2->nr_iid_par, ps2->num_env, 1);
611 remap20(&icc_mapped, ps2->icc_par, ps2->nr_icc_par, ps2->num_env, 1);
612 if (ps2->enable_ipdopd) {
613 remap20(&ipd_mapped, ps2->ipd_par, ps2->nr_ipdopd_par, ps2->num_env, 0);
614 remap20(&opd_mapped, ps2->opd_par, ps2->nr_ipdopd_par, ps2->num_env, 0);
615 }
616 if (ps2->is34bands_old) {
617 map_val_34_to_20(H11[0][0]);
618 map_val_34_to_20(H11[1][0]);
619 map_val_34_to_20(H12[0][0]);
620 map_val_34_to_20(H12[1][0]);
621 map_val_34_to_20(H21[0][0]);
622 map_val_34_to_20(H21[1][0]);
623 map_val_34_to_20(H22[0][0]);
624 map_val_34_to_20(H22[1][0]);
625 ipdopd_reset(ipd_hist, opd_hist);
626 }
627 }
628
629 //Mixing
630 for (e = 0; e < ps2->num_env; e++) {
631 for (b = 0; b < NR_PAR_BANDS[is34]; b++) {
632 INTFLOAT h11, h12, h21, h22;
633 h11 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps2->iid_quant][icc_mapped[e][b]][0];
634 h12 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps2->iid_quant][icc_mapped[e][b]][1];
635 h21 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps2->iid_quant][icc_mapped[e][b]][2];
636 h22 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps2->iid_quant][icc_mapped[e][b]][3];
637
638 if (!PS_BASELINE && ps2->enable_ipdopd && b < NR_IPDOPD_BANDS[is34]) {
639 //The spec say says to only run this smoother when enable_ipdopd
640 //is set but the reference decoder appears to run it constantly
641 INTFLOAT h11i, h12i, h21i, h22i;
642 INTFLOAT ipd_adj_re, ipd_adj_im;
643 int opd_idx = opd_hist[b] * 8 + opd_mapped[e][b];
644 int ipd_idx = ipd_hist[b] * 8 + ipd_mapped[e][b];
645 INTFLOAT opd_re = pd_re_smooth[opd_idx];
646 INTFLOAT opd_im = pd_im_smooth[opd_idx];
647 INTFLOAT ipd_re = pd_re_smooth[ipd_idx];
648 INTFLOAT ipd_im = pd_im_smooth[ipd_idx];
649 opd_hist[b] = opd_idx & 0x3F;
650 ipd_hist[b] = ipd_idx & 0x3F;
651
652 ipd_adj_re = AAC_MADD30(opd_re, ipd_re, opd_im, ipd_im);
653 ipd_adj_im = AAC_MSUB30(opd_im, ipd_re, opd_re, ipd_im);
654 h11i = AAC_MUL30(h11, opd_im);
655 h11 = AAC_MUL30(h11, opd_re);
656 h12i = AAC_MUL30(h12, ipd_adj_im);
657 h12 = AAC_MUL30(h12, ipd_adj_re);
658 h21i = AAC_MUL30(h21, opd_im);
659 h21 = AAC_MUL30(h21, opd_re);
660 h22i = AAC_MUL30(h22, ipd_adj_im);
661 h22 = AAC_MUL30(h22, ipd_adj_re);
662 H11[1][e+1][b] = h11i;
663 H12[1][e+1][b] = h12i;
664 H21[1][e+1][b] = h21i;
665 H22[1][e+1][b] = h22i;
666 }
667 H11[0][e+1][b] = h11;
668 H12[0][e+1][b] = h12;
669 H21[0][e+1][b] = h21;
670 H22[0][e+1][b] = h22;
671 }
672 for (k = 0; k < NR_BANDS[is34]; k++) {
673 LOCAL_ALIGNED_16(INTFLOAT, h, [2], [4]);
674 LOCAL_ALIGNED_16(INTFLOAT, h_step, [2], [4]);
675 int start = ps2->border_position[e];
676 int stop = ps2->border_position[e+1];
677 INTFLOAT width = Q30(1.f) / ((stop - start) ? (stop - start) : 1);
678 #if USE_FIXED
679 width = FFMIN(2U*width, INT_MAX);
680 #endif
681 b = k_to_i[k];
682 h[0][0] = H11[0][e][b];
683 h[0][1] = H12[0][e][b];
684 h[0][2] = H21[0][e][b];
685 h[0][3] = H22[0][e][b];
686 if (!PS_BASELINE && ps2->enable_ipdopd) {
687 //Is this necessary? ps_04_new seems unchanged
688 if ((is34 && k <= 13 && k >= 9) || (!is34 && k <= 1)) {
689 h[1][0] = -H11[1][e][b];
690 h[1][1] = -H12[1][e][b];
691 h[1][2] = -H21[1][e][b];
692 h[1][3] = -H22[1][e][b];
693 } else {
694 h[1][0] = H11[1][e][b];
695 h[1][1] = H12[1][e][b];
696 h[1][2] = H21[1][e][b];
697 h[1][3] = H22[1][e][b];
698 }
699 }
700 //Interpolation
701 h_step[0][0] = AAC_MSUB31_V3(H11[0][e+1][b], h[0][0], width);
702 h_step[0][1] = AAC_MSUB31_V3(H12[0][e+1][b], h[0][1], width);
703 h_step[0][2] = AAC_MSUB31_V3(H21[0][e+1][b], h[0][2], width);
704 h_step[0][3] = AAC_MSUB31_V3(H22[0][e+1][b], h[0][3], width);
705 if (!PS_BASELINE && ps2->enable_ipdopd) {
706 h_step[1][0] = AAC_MSUB31_V3(H11[1][e+1][b], h[1][0], width);
707 h_step[1][1] = AAC_MSUB31_V3(H12[1][e+1][b], h[1][1], width);
708 h_step[1][2] = AAC_MSUB31_V3(H21[1][e+1][b], h[1][2], width);
709 h_step[1][3] = AAC_MSUB31_V3(H22[1][e+1][b], h[1][3], width);
710 }
711 if (stop - start)
712 ps->dsp.stereo_interpolate[!PS_BASELINE && ps2->enable_ipdopd](
713 l[k] + 1 + start, r[k] + 1 + start,
714 h, h_step, stop - start);
715 }
716 }
717 }
718
719 int AAC_RENAME(ff_ps_apply)(PSContext *ps, INTFLOAT L[2][38][64], INTFLOAT R[2][38][64], int top)
720 {
721 INTFLOAT (*Lbuf)[32][2] = ps->Lbuf;
722 INTFLOAT (*Rbuf)[32][2] = ps->Rbuf;
723 const int len = 32;
724 int is34 = ps->common.is34bands;
725
726 top += NR_BANDS[is34] - 64;
727 memset(ps->delay+top, 0, (NR_BANDS[is34] - top)*sizeof(ps->delay[0]));
728 if (top < NR_ALLPASS_BANDS[is34])
729 memset(ps->ap_delay + top, 0, (NR_ALLPASS_BANDS[is34] - top)*sizeof(ps->ap_delay[0]));
730
731 hybrid_analysis(&ps->dsp, Lbuf, ps->in_buf, L, is34, len);
732 decorrelation(ps, Rbuf, (const INTFLOAT (*)[32][2]) Lbuf, is34);
733 stereo_processing(ps, Lbuf, Rbuf, is34);
734 hybrid_synthesis(&ps->dsp, L, Lbuf, is34, len);
735 hybrid_synthesis(&ps->dsp, R, Rbuf, is34, len);
736
737 return 0;
738 }
739
740 av_cold void AAC_RENAME(ff_ps_init)(void) {
741 ps_tableinit();
742 }