2 * MPEG-4 Parametric Stereo decoding functions
3 * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
5 * This file is part of FFmpeg.
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.
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.
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
23 #include "libavutil/common.h"
24 #include "libavutil/mathematics.h"
28 #include "aacps_tablegen.h"
29 #include "aacpsdata.c"
32 #define PS_BASELINE 0 ///< Operate in Baseline PS mode
33 ///< Baseline implies 10 or 20 stereo bands,
34 ///< mixing mode A, and no ipd/opd
36 #define numQMFSlots 32 //numTimeSlots * RATE
38 static const int8_t num_env_tab[2][4] = {
43 static const int8_t nr_iidicc_par_tab[] = {
44 10, 20, 34, 10, 20, 34,
47 static const int8_t nr_iidopd_par_tab[] = {
64 static const int huff_iid[] = {
71 static VLC vlc_ps[10];
73 #define READ_PAR_DATA(PAR, OFFSET, MASK, ERR_CONDITION) \
75 * Read Inter-channel Intensity Difference/Inter-Channel Coherence/ \
76 * Inter-channel Phase Difference/Overall Phase Difference parameters from the \
79 * @param avctx contains the current codec context \
80 * @param gb pointer to the input bitstream \
81 * @param ps pointer to the Parametric Stereo context \
82 * @param PAR pointer to the parameter to be read \
83 * @param e envelope to decode \
84 * @param dt 1: time delta-coded, 0: frequency delta-coded \
86 static int read_ ## PAR ## _data(AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, \
87 int8_t (*PAR)[PS_MAX_NR_IIDICC], int table_idx, int e, int dt) \
89 int b, num = ps->nr_ ## PAR ## _par; \
90 VLC_TYPE (*vlc_table)[2] = vlc_ps[table_idx].table; \
92 int e_prev = e ? e - 1 : ps->num_env_old - 1; \
93 e_prev = FFMAX(e_prev, 0); \
94 for (b = 0; b < num; b++) { \
95 int val = PAR[e_prev][b] + get_vlc2(gb, vlc_table, 9, 3) - OFFSET; \
96 if (MASK) val &= MASK; \
103 for (b = 0; b < num; b++) { \
104 val += get_vlc2(gb, vlc_table, 9, 3) - OFFSET; \
105 if (MASK) val &= MASK; \
113 av_log(avctx, AV_LOG_ERROR, "illegal "#PAR"\n"); \
117 READ_PAR_DATA(iid, huff_offset[table_idx], 0, FFABS(ps->iid_par[e][b]) > 7 + 8 * ps->iid_quant)
118 READ_PAR_DATA(icc, huff_offset[table_idx], 0, ps->icc_par[e][b] > 7U)
119 READ_PAR_DATA(ipdopd, 0, 0x07, 0)
121 static int ps_read_extension_data(GetBitContext *gb, PSContext *ps, int ps_extension_id)
124 int count = get_bits_count(gb);
129 ps->enable_ipdopd = get_bits1(gb);
130 if (ps->enable_ipdopd) {
131 for (e = 0; e < ps->num_env; e++) {
132 int dt = get_bits1(gb);
133 read_ipdopd_data(NULL, gb, ps, ps->ipd_par, dt ? huff_ipd_dt : huff_ipd_df, e, dt);
135 read_ipdopd_data(NULL, gb, ps, ps->opd_par, dt ? huff_opd_dt : huff_opd_df, e, dt);
138 skip_bits1(gb); //reserved_ps
139 return get_bits_count(gb) - count;
142 static void ipdopd_reset(int8_t *ipd_hist, int8_t *opd_hist)
145 for (i = 0; i < PS_MAX_NR_IPDOPD; i++) {
151 int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb_host, PSContext *ps, int bits_left)
154 int bit_count_start = get_bits_count(gb_host);
157 GetBitContext gbc = *gb_host, *gb = &gbc;
159 header = get_bits1(gb);
160 if (header) { //enable_ps_header
161 ps->enable_iid = get_bits1(gb);
162 if (ps->enable_iid) {
163 int iid_mode = get_bits(gb, 3);
165 av_log(avctx, AV_LOG_ERROR, "iid_mode %d is reserved.\n",
169 ps->nr_iid_par = nr_iidicc_par_tab[iid_mode];
170 ps->iid_quant = iid_mode > 2;
171 ps->nr_ipdopd_par = nr_iidopd_par_tab[iid_mode];
173 ps->enable_icc = get_bits1(gb);
174 if (ps->enable_icc) {
175 ps->icc_mode = get_bits(gb, 3);
176 if (ps->icc_mode > 5) {
177 av_log(avctx, AV_LOG_ERROR, "icc_mode %d is reserved.\n",
181 ps->nr_icc_par = nr_iidicc_par_tab[ps->icc_mode];
183 ps->enable_ext = get_bits1(gb);
186 ps->frame_class = get_bits1(gb);
187 ps->num_env_old = ps->num_env;
188 ps->num_env = num_env_tab[ps->frame_class][get_bits(gb, 2)];
190 ps->border_position[0] = -1;
191 if (ps->frame_class) {
192 for (e = 1; e <= ps->num_env; e++)
193 ps->border_position[e] = get_bits(gb, 5);
195 for (e = 1; e <= ps->num_env; e++)
196 ps->border_position[e] = (e * numQMFSlots >> ff_log2_tab[ps->num_env]) - 1;
198 if (ps->enable_iid) {
199 for (e = 0; e < ps->num_env; e++) {
200 int dt = get_bits1(gb);
201 if (read_iid_data(avctx, gb, ps, ps->iid_par, huff_iid[2*dt+ps->iid_quant], e, dt))
205 memset(ps->iid_par, 0, sizeof(ps->iid_par));
208 for (e = 0; e < ps->num_env; e++) {
209 int dt = get_bits1(gb);
210 if (read_icc_data(avctx, gb, ps, ps->icc_par, dt ? huff_icc_dt : huff_icc_df, e, dt))
214 memset(ps->icc_par, 0, sizeof(ps->icc_par));
216 if (ps->enable_ext) {
217 int cnt = get_bits(gb, 4);
219 cnt += get_bits(gb, 8);
223 int ps_extension_id = get_bits(gb, 2);
224 cnt -= 2 + ps_read_extension_data(gb, ps, ps_extension_id);
227 av_log(avctx, AV_LOG_ERROR, "ps extension overflow %d\n", cnt);
233 ps->enable_ipdopd &= !PS_BASELINE;
236 if (!ps->num_env || ps->border_position[ps->num_env] < numQMFSlots - 1) {
237 //Create a fake envelope
238 int source = ps->num_env ? ps->num_env - 1 : ps->num_env_old - 1;
239 if (source >= 0 && source != ps->num_env) {
240 if (ps->enable_iid) {
241 memcpy(ps->iid_par+ps->num_env, ps->iid_par+source, sizeof(ps->iid_par[0]));
243 if (ps->enable_icc) {
244 memcpy(ps->icc_par+ps->num_env, ps->icc_par+source, sizeof(ps->icc_par[0]));
246 if (ps->enable_ipdopd) {
247 memcpy(ps->ipd_par+ps->num_env, ps->ipd_par+source, sizeof(ps->ipd_par[0]));
248 memcpy(ps->opd_par+ps->num_env, ps->opd_par+source, sizeof(ps->opd_par[0]));
252 ps->border_position[ps->num_env] = numQMFSlots - 1;
256 ps->is34bands_old = ps->is34bands;
257 if (!PS_BASELINE && (ps->enable_iid || ps->enable_icc))
258 ps->is34bands = (ps->enable_iid && ps->nr_iid_par == 34) ||
259 (ps->enable_icc && ps->nr_icc_par == 34);
262 if (!ps->enable_ipdopd) {
263 memset(ps->ipd_par, 0, sizeof(ps->ipd_par));
264 memset(ps->opd_par, 0, sizeof(ps->opd_par));
270 bits_consumed = get_bits_count(gb) - bit_count_start;
271 if (bits_consumed <= bits_left) {
272 skip_bits_long(gb_host, bits_consumed);
273 return bits_consumed;
275 av_log(avctx, AV_LOG_ERROR, "Expected to read %d PS bits actually read %d.\n", bits_left, bits_consumed);
278 skip_bits_long(gb_host, bits_left);
279 memset(ps->iid_par, 0, sizeof(ps->iid_par));
280 memset(ps->icc_par, 0, sizeof(ps->icc_par));
281 memset(ps->ipd_par, 0, sizeof(ps->ipd_par));
282 memset(ps->opd_par, 0, sizeof(ps->opd_par));
286 /** Split one subband into 2 subsubbands with a symmetric real filter.
287 * The filter must have its non-center even coefficients equal to zero. */
288 static void hybrid2_re(float (*in)[2], float (*out)[32][2], const float filter[8], int len, int reverse)
291 for (i = 0; i < len; i++, in++) {
292 float re_in = filter[6] * in[6][0]; //real inphase
293 float re_op = 0.0f; //real out of phase
294 float im_in = filter[6] * in[6][1]; //imag inphase
295 float im_op = 0.0f; //imag out of phase
296 for (j = 0; j < 6; j += 2) {
297 re_op += filter[j+1] * (in[j+1][0] + in[12-j-1][0]);
298 im_op += filter[j+1] * (in[j+1][1] + in[12-j-1][1]);
300 out[ reverse][i][0] = re_in + re_op;
301 out[ reverse][i][1] = im_in + im_op;
302 out[!reverse][i][0] = re_in - re_op;
303 out[!reverse][i][1] = im_in - im_op;
307 /** Split one subband into 6 subsubbands with a complex filter */
308 static void hybrid6_cx(PSDSPContext *dsp, float (*in)[2], float (*out)[32][2], const float (*filter)[8][2], int len)
312 LOCAL_ALIGNED_16(float, temp, [8], [2]);
314 for (i = 0; i < len; i++, in++) {
315 dsp->hybrid_analysis(temp, in, filter, 1, N);
316 out[0][i][0] = temp[6][0];
317 out[0][i][1] = temp[6][1];
318 out[1][i][0] = temp[7][0];
319 out[1][i][1] = temp[7][1];
320 out[2][i][0] = temp[0][0];
321 out[2][i][1] = temp[0][1];
322 out[3][i][0] = temp[1][0];
323 out[3][i][1] = temp[1][1];
324 out[4][i][0] = temp[2][0] + temp[5][0];
325 out[4][i][1] = temp[2][1] + temp[5][1];
326 out[5][i][0] = temp[3][0] + temp[4][0];
327 out[5][i][1] = temp[3][1] + temp[4][1];
331 static void hybrid4_8_12_cx(PSDSPContext *dsp, float (*in)[2], float (*out)[32][2], const float (*filter)[8][2], int N, int len)
335 for (i = 0; i < len; i++, in++) {
336 dsp->hybrid_analysis(out[0] + i, in, filter, 32, N);
340 static void hybrid_analysis(PSDSPContext *dsp, float out[91][32][2],
341 float in[5][44][2], float L[2][38][64],
345 for (i = 0; i < 5; i++) {
346 for (j = 0; j < 38; j++) {
347 in[i][j+6][0] = L[0][j][i];
348 in[i][j+6][1] = L[1][j][i];
352 hybrid4_8_12_cx(dsp, in[0], out, f34_0_12, 12, len);
353 hybrid4_8_12_cx(dsp, in[1], out+12, f34_1_8, 8, len);
354 hybrid4_8_12_cx(dsp, in[2], out+20, f34_2_4, 4, len);
355 hybrid4_8_12_cx(dsp, in[3], out+24, f34_2_4, 4, len);
356 hybrid4_8_12_cx(dsp, in[4], out+28, f34_2_4, 4, len);
357 dsp->hybrid_analysis_ileave(out + 27, L, 5, len);
359 hybrid6_cx(dsp, in[0], out, f20_0_8, len);
360 hybrid2_re(in[1], out+6, g1_Q2, len, 1);
361 hybrid2_re(in[2], out+8, g1_Q2, len, 0);
362 dsp->hybrid_analysis_ileave(out + 7, L, 3, len);
365 for (i = 0; i < 5; i++) {
366 memcpy(in[i], in[i]+32, 6 * sizeof(in[i][0]));
370 static void hybrid_synthesis(PSDSPContext *dsp, float out[2][38][64],
371 float in[91][32][2], int is34, int len)
375 for (n = 0; n < len; n++) {
376 memset(out[0][n], 0, 5*sizeof(out[0][n][0]));
377 memset(out[1][n], 0, 5*sizeof(out[1][n][0]));
378 for (i = 0; i < 12; i++) {
379 out[0][n][0] += in[ i][n][0];
380 out[1][n][0] += in[ i][n][1];
382 for (i = 0; i < 8; i++) {
383 out[0][n][1] += in[12+i][n][0];
384 out[1][n][1] += in[12+i][n][1];
386 for (i = 0; i < 4; i++) {
387 out[0][n][2] += in[20+i][n][0];
388 out[1][n][2] += in[20+i][n][1];
389 out[0][n][3] += in[24+i][n][0];
390 out[1][n][3] += in[24+i][n][1];
391 out[0][n][4] += in[28+i][n][0];
392 out[1][n][4] += in[28+i][n][1];
395 dsp->hybrid_synthesis_deint(out, in + 27, 5, len);
397 for (n = 0; n < len; n++) {
398 out[0][n][0] = in[0][n][0] + in[1][n][0] + in[2][n][0] +
399 in[3][n][0] + in[4][n][0] + in[5][n][0];
400 out[1][n][0] = in[0][n][1] + in[1][n][1] + in[2][n][1] +
401 in[3][n][1] + in[4][n][1] + in[5][n][1];
402 out[0][n][1] = in[6][n][0] + in[7][n][0];
403 out[1][n][1] = in[6][n][1] + in[7][n][1];
404 out[0][n][2] = in[8][n][0] + in[9][n][0];
405 out[1][n][2] = in[8][n][1] + in[9][n][1];
407 dsp->hybrid_synthesis_deint(out, in + 7, 3, len);
411 /// All-pass filter decay slope
412 #define DECAY_SLOPE 0.05f
413 /// Number of frequency bands that can be addressed by the parameter index, b(k)
414 static const int NR_PAR_BANDS[] = { 20, 34 };
415 /// Number of frequency bands that can be addressed by the sub subband index, k
416 static const int NR_BANDS[] = { 71, 91 };
417 /// Start frequency band for the all-pass filter decay slope
418 static const int DECAY_CUTOFF[] = { 10, 32 };
419 /// Number of all-pass filer bands
420 static const int NR_ALLPASS_BANDS[] = { 30, 50 };
421 /// First stereo band using the short one sample delay
422 static const int SHORT_DELAY_BAND[] = { 42, 62 };
425 static void map_idx_10_to_20(int8_t *par_mapped, const int8_t *par, int full)
434 for (; b >= 0; b--) {
435 par_mapped[2*b+1] = par_mapped[2*b] = par[b];
439 static void map_idx_34_to_20(int8_t *par_mapped, const int8_t *par, int full)
441 par_mapped[ 0] = (2*par[ 0] + par[ 1]) / 3;
442 par_mapped[ 1] = ( par[ 1] + 2*par[ 2]) / 3;
443 par_mapped[ 2] = (2*par[ 3] + par[ 4]) / 3;
444 par_mapped[ 3] = ( par[ 4] + 2*par[ 5]) / 3;
445 par_mapped[ 4] = ( par[ 6] + par[ 7]) / 2;
446 par_mapped[ 5] = ( par[ 8] + par[ 9]) / 2;
447 par_mapped[ 6] = par[10];
448 par_mapped[ 7] = par[11];
449 par_mapped[ 8] = ( par[12] + par[13]) / 2;
450 par_mapped[ 9] = ( par[14] + par[15]) / 2;
451 par_mapped[10] = par[16];
453 par_mapped[11] = par[17];
454 par_mapped[12] = par[18];
455 par_mapped[13] = par[19];
456 par_mapped[14] = ( par[20] + par[21]) / 2;
457 par_mapped[15] = ( par[22] + par[23]) / 2;
458 par_mapped[16] = ( par[24] + par[25]) / 2;
459 par_mapped[17] = ( par[26] + par[27]) / 2;
460 par_mapped[18] = ( par[28] + par[29] + par[30] + par[31]) / 4;
461 par_mapped[19] = ( par[32] + par[33]) / 2;
465 static void map_val_34_to_20(float par[PS_MAX_NR_IIDICC])
467 par[ 0] = (2*par[ 0] + par[ 1]) * 0.33333333f;
468 par[ 1] = ( par[ 1] + 2*par[ 2]) * 0.33333333f;
469 par[ 2] = (2*par[ 3] + par[ 4]) * 0.33333333f;
470 par[ 3] = ( par[ 4] + 2*par[ 5]) * 0.33333333f;
471 par[ 4] = ( par[ 6] + par[ 7]) * 0.5f;
472 par[ 5] = ( par[ 8] + par[ 9]) * 0.5f;
475 par[ 8] = ( par[12] + par[13]) * 0.5f;
476 par[ 9] = ( par[14] + par[15]) * 0.5f;
481 par[14] = ( par[20] + par[21]) * 0.5f;
482 par[15] = ( par[22] + par[23]) * 0.5f;
483 par[16] = ( par[24] + par[25]) * 0.5f;
484 par[17] = ( par[26] + par[27]) * 0.5f;
485 par[18] = ( par[28] + par[29] + par[30] + par[31]) * 0.25f;
486 par[19] = ( par[32] + par[33]) * 0.5f;
489 static void map_idx_10_to_34(int8_t *par_mapped, const int8_t *par, int full)
492 par_mapped[33] = par[9];
493 par_mapped[32] = par[9];
494 par_mapped[31] = par[9];
495 par_mapped[30] = par[9];
496 par_mapped[29] = par[9];
497 par_mapped[28] = par[9];
498 par_mapped[27] = par[8];
499 par_mapped[26] = par[8];
500 par_mapped[25] = par[8];
501 par_mapped[24] = par[8];
502 par_mapped[23] = par[7];
503 par_mapped[22] = par[7];
504 par_mapped[21] = par[7];
505 par_mapped[20] = par[7];
506 par_mapped[19] = par[6];
507 par_mapped[18] = par[6];
508 par_mapped[17] = par[5];
509 par_mapped[16] = par[5];
513 par_mapped[15] = par[4];
514 par_mapped[14] = par[4];
515 par_mapped[13] = par[4];
516 par_mapped[12] = par[4];
517 par_mapped[11] = par[3];
518 par_mapped[10] = par[3];
519 par_mapped[ 9] = par[2];
520 par_mapped[ 8] = par[2];
521 par_mapped[ 7] = par[2];
522 par_mapped[ 6] = par[2];
523 par_mapped[ 5] = par[1];
524 par_mapped[ 4] = par[1];
525 par_mapped[ 3] = par[1];
526 par_mapped[ 2] = par[0];
527 par_mapped[ 1] = par[0];
528 par_mapped[ 0] = par[0];
531 static void map_idx_20_to_34(int8_t *par_mapped, const int8_t *par, int full)
534 par_mapped[33] = par[19];
535 par_mapped[32] = par[19];
536 par_mapped[31] = par[18];
537 par_mapped[30] = par[18];
538 par_mapped[29] = par[18];
539 par_mapped[28] = par[18];
540 par_mapped[27] = par[17];
541 par_mapped[26] = par[17];
542 par_mapped[25] = par[16];
543 par_mapped[24] = par[16];
544 par_mapped[23] = par[15];
545 par_mapped[22] = par[15];
546 par_mapped[21] = par[14];
547 par_mapped[20] = par[14];
548 par_mapped[19] = par[13];
549 par_mapped[18] = par[12];
550 par_mapped[17] = par[11];
552 par_mapped[16] = par[10];
553 par_mapped[15] = par[ 9];
554 par_mapped[14] = par[ 9];
555 par_mapped[13] = par[ 8];
556 par_mapped[12] = par[ 8];
557 par_mapped[11] = par[ 7];
558 par_mapped[10] = par[ 6];
559 par_mapped[ 9] = par[ 5];
560 par_mapped[ 8] = par[ 5];
561 par_mapped[ 7] = par[ 4];
562 par_mapped[ 6] = par[ 4];
563 par_mapped[ 5] = par[ 3];
564 par_mapped[ 4] = (par[ 2] + par[ 3]) / 2;
565 par_mapped[ 3] = par[ 2];
566 par_mapped[ 2] = par[ 1];
567 par_mapped[ 1] = (par[ 0] + par[ 1]) / 2;
568 par_mapped[ 0] = par[ 0];
571 static void map_val_20_to_34(float par[PS_MAX_NR_IIDICC])
602 par[ 4] = (par[ 2] + par[ 3]) * 0.5f;
605 par[ 1] = (par[ 0] + par[ 1]) * 0.5f;
608 static void decorrelation(PSContext *ps, float (*out)[32][2], const float (*s)[32][2], int is34)
610 LOCAL_ALIGNED_16(float, power, [34], [PS_QMF_TIME_SLOTS]);
611 LOCAL_ALIGNED_16(float, transient_gain, [34], [PS_QMF_TIME_SLOTS]);
612 float *peak_decay_nrg = ps->peak_decay_nrg;
613 float *power_smooth = ps->power_smooth;
614 float *peak_decay_diff_smooth = ps->peak_decay_diff_smooth;
615 float (*delay)[PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2] = ps->delay;
616 float (*ap_delay)[PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2] = ps->ap_delay;
617 const int8_t *k_to_i = is34 ? k_to_i_34 : k_to_i_20;
618 const float peak_decay_factor = 0.76592833836465f;
619 const float transient_impact = 1.5f;
620 const float a_smooth = 0.25f; ///< Smoothing coefficient
624 memset(power, 0, 34 * sizeof(*power));
626 if (is34 != ps->is34bands_old) {
627 memset(ps->peak_decay_nrg, 0, sizeof(ps->peak_decay_nrg));
628 memset(ps->power_smooth, 0, sizeof(ps->power_smooth));
629 memset(ps->peak_decay_diff_smooth, 0, sizeof(ps->peak_decay_diff_smooth));
630 memset(ps->delay, 0, sizeof(ps->delay));
631 memset(ps->ap_delay, 0, sizeof(ps->ap_delay));
634 for (k = 0; k < NR_BANDS[is34]; k++) {
636 ps->dsp.add_squares(power[i], s[k], nL - n0);
639 //Transient detection
640 for (i = 0; i < NR_PAR_BANDS[is34]; i++) {
641 for (n = n0; n < nL; n++) {
642 float decayed_peak = peak_decay_factor * peak_decay_nrg[i];
644 peak_decay_nrg[i] = FFMAX(decayed_peak, power[i][n]);
645 power_smooth[i] += a_smooth * (power[i][n] - power_smooth[i]);
646 peak_decay_diff_smooth[i] += a_smooth * (peak_decay_nrg[i] - power[i][n] - peak_decay_diff_smooth[i]);
647 denom = transient_impact * peak_decay_diff_smooth[i];
648 transient_gain[i][n] = (denom > power_smooth[i]) ?
649 power_smooth[i] / denom : 1.0f;
653 //Decorrelation and transient reduction
656 // | | Q_fract_allpass[k][m]*z^-link_delay[m] - a[m]*g_decay_slope[k]
657 //H[k][z] = z^-2 * phi_fract[k] * | | ----------------------------------------------------------------
658 // | | 1 - a[m]*g_decay_slope[k]*Q_fract_allpass[k][m]*z^-link_delay[m]
660 //d[k][z] (out) = transient_gain_mapped[k][z] * H[k][z] * s[k][z]
661 for (k = 0; k < NR_ALLPASS_BANDS[is34]; k++) {
663 float g_decay_slope = 1.f - DECAY_SLOPE * (k - DECAY_CUTOFF[is34]);
664 g_decay_slope = av_clipf(g_decay_slope, 0.f, 1.f);
665 memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));
666 memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));
667 for (m = 0; m < PS_AP_LINKS; m++) {
668 memcpy(ap_delay[k][m], ap_delay[k][m]+numQMFSlots, 5*sizeof(ap_delay[k][m][0]));
670 ps->dsp.decorrelate(out[k], delay[k] + PS_MAX_DELAY - 2, ap_delay[k],
671 phi_fract[is34][k], Q_fract_allpass[is34][k],
672 transient_gain[b], g_decay_slope, nL - n0);
674 for (; k < SHORT_DELAY_BAND[is34]; k++) {
676 memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));
677 memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));
679 ps->dsp.mul_pair_single(out[k], delay[k] + PS_MAX_DELAY - 14,
680 transient_gain[i], nL - n0);
682 for (; k < NR_BANDS[is34]; k++) {
684 memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));
685 memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));
687 ps->dsp.mul_pair_single(out[k], delay[k] + PS_MAX_DELAY - 1,
688 transient_gain[i], nL - n0);
692 static void remap34(int8_t (**p_par_mapped)[PS_MAX_NR_IIDICC],
693 int8_t (*par)[PS_MAX_NR_IIDICC],
694 int num_par, int num_env, int full)
696 int8_t (*par_mapped)[PS_MAX_NR_IIDICC] = *p_par_mapped;
698 if (num_par == 20 || num_par == 11) {
699 for (e = 0; e < num_env; e++) {
700 map_idx_20_to_34(par_mapped[e], par[e], full);
702 } else if (num_par == 10 || num_par == 5) {
703 for (e = 0; e < num_env; e++) {
704 map_idx_10_to_34(par_mapped[e], par[e], full);
711 static void remap20(int8_t (**p_par_mapped)[PS_MAX_NR_IIDICC],
712 int8_t (*par)[PS_MAX_NR_IIDICC],
713 int num_par, int num_env, int full)
715 int8_t (*par_mapped)[PS_MAX_NR_IIDICC] = *p_par_mapped;
717 if (num_par == 34 || num_par == 17) {
718 for (e = 0; e < num_env; e++) {
719 map_idx_34_to_20(par_mapped[e], par[e], full);
721 } else if (num_par == 10 || num_par == 5) {
722 for (e = 0; e < num_env; e++) {
723 map_idx_10_to_20(par_mapped[e], par[e], full);
730 static void stereo_processing(PSContext *ps, float (*l)[32][2], float (*r)[32][2], int is34)
734 float (*H11)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H11;
735 float (*H12)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H12;
736 float (*H21)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H21;
737 float (*H22)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H22;
738 int8_t *opd_hist = ps->opd_hist;
739 int8_t *ipd_hist = ps->ipd_hist;
740 int8_t iid_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
741 int8_t icc_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
742 int8_t ipd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
743 int8_t opd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
744 int8_t (*iid_mapped)[PS_MAX_NR_IIDICC] = iid_mapped_buf;
745 int8_t (*icc_mapped)[PS_MAX_NR_IIDICC] = icc_mapped_buf;
746 int8_t (*ipd_mapped)[PS_MAX_NR_IIDICC] = ipd_mapped_buf;
747 int8_t (*opd_mapped)[PS_MAX_NR_IIDICC] = opd_mapped_buf;
748 const int8_t *k_to_i = is34 ? k_to_i_34 : k_to_i_20;
749 const float (*H_LUT)[8][4] = (PS_BASELINE || ps->icc_mode < 3) ? HA : HB;
752 if (ps->num_env_old) {
753 memcpy(H11[0][0], H11[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H11[0][0][0]));
754 memcpy(H11[1][0], H11[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H11[1][0][0]));
755 memcpy(H12[0][0], H12[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H12[0][0][0]));
756 memcpy(H12[1][0], H12[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H12[1][0][0]));
757 memcpy(H21[0][0], H21[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H21[0][0][0]));
758 memcpy(H21[1][0], H21[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H21[1][0][0]));
759 memcpy(H22[0][0], H22[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H22[0][0][0]));
760 memcpy(H22[1][0], H22[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H22[1][0][0]));
764 remap34(&iid_mapped, ps->iid_par, ps->nr_iid_par, ps->num_env, 1);
765 remap34(&icc_mapped, ps->icc_par, ps->nr_icc_par, ps->num_env, 1);
766 if (ps->enable_ipdopd) {
767 remap34(&ipd_mapped, ps->ipd_par, ps->nr_ipdopd_par, ps->num_env, 0);
768 remap34(&opd_mapped, ps->opd_par, ps->nr_ipdopd_par, ps->num_env, 0);
770 if (!ps->is34bands_old) {
771 map_val_20_to_34(H11[0][0]);
772 map_val_20_to_34(H11[1][0]);
773 map_val_20_to_34(H12[0][0]);
774 map_val_20_to_34(H12[1][0]);
775 map_val_20_to_34(H21[0][0]);
776 map_val_20_to_34(H21[1][0]);
777 map_val_20_to_34(H22[0][0]);
778 map_val_20_to_34(H22[1][0]);
779 ipdopd_reset(ipd_hist, opd_hist);
782 remap20(&iid_mapped, ps->iid_par, ps->nr_iid_par, ps->num_env, 1);
783 remap20(&icc_mapped, ps->icc_par, ps->nr_icc_par, ps->num_env, 1);
784 if (ps->enable_ipdopd) {
785 remap20(&ipd_mapped, ps->ipd_par, ps->nr_ipdopd_par, ps->num_env, 0);
786 remap20(&opd_mapped, ps->opd_par, ps->nr_ipdopd_par, ps->num_env, 0);
788 if (ps->is34bands_old) {
789 map_val_34_to_20(H11[0][0]);
790 map_val_34_to_20(H11[1][0]);
791 map_val_34_to_20(H12[0][0]);
792 map_val_34_to_20(H12[1][0]);
793 map_val_34_to_20(H21[0][0]);
794 map_val_34_to_20(H21[1][0]);
795 map_val_34_to_20(H22[0][0]);
796 map_val_34_to_20(H22[1][0]);
797 ipdopd_reset(ipd_hist, opd_hist);
802 for (e = 0; e < ps->num_env; e++) {
803 for (b = 0; b < NR_PAR_BANDS[is34]; b++) {
804 float h11, h12, h21, h22;
805 h11 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][0];
806 h12 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][1];
807 h21 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][2];
808 h22 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][3];
809 if (!PS_BASELINE && ps->enable_ipdopd && b < ps->nr_ipdopd_par) {
810 //The spec say says to only run this smoother when enable_ipdopd
811 //is set but the reference decoder appears to run it constantly
812 float h11i, h12i, h21i, h22i;
813 float ipd_adj_re, ipd_adj_im;
814 int opd_idx = opd_hist[b] * 8 + opd_mapped[e][b];
815 int ipd_idx = ipd_hist[b] * 8 + ipd_mapped[e][b];
816 float opd_re = pd_re_smooth[opd_idx];
817 float opd_im = pd_im_smooth[opd_idx];
818 float ipd_re = pd_re_smooth[ipd_idx];
819 float ipd_im = pd_im_smooth[ipd_idx];
820 opd_hist[b] = opd_idx & 0x3F;
821 ipd_hist[b] = ipd_idx & 0x3F;
823 ipd_adj_re = opd_re*ipd_re + opd_im*ipd_im;
824 ipd_adj_im = opd_im*ipd_re - opd_re*ipd_im;
827 h12i = h12 * ipd_adj_im;
828 h12 = h12 * ipd_adj_re;
831 h22i = h22 * ipd_adj_im;
832 h22 = h22 * ipd_adj_re;
833 H11[1][e+1][b] = h11i;
834 H12[1][e+1][b] = h12i;
835 H21[1][e+1][b] = h21i;
836 H22[1][e+1][b] = h22i;
838 H11[0][e+1][b] = h11;
839 H12[0][e+1][b] = h12;
840 H21[0][e+1][b] = h21;
841 H22[0][e+1][b] = h22;
843 for (k = 0; k < NR_BANDS[is34]; k++) {
846 int start = ps->border_position[e];
847 int stop = ps->border_position[e+1];
848 float width = 1.f / (stop - start);
850 h[0][0] = H11[0][e][b];
851 h[0][1] = H12[0][e][b];
852 h[0][2] = H21[0][e][b];
853 h[0][3] = H22[0][e][b];
854 if (!PS_BASELINE && ps->enable_ipdopd) {
855 //Is this necessary? ps_04_new seems unchanged
856 if ((is34 && k <= 13 && k >= 9) || (!is34 && k <= 1)) {
857 h[1][0] = -H11[1][e][b];
858 h[1][1] = -H12[1][e][b];
859 h[1][2] = -H21[1][e][b];
860 h[1][3] = -H22[1][e][b];
862 h[1][0] = H11[1][e][b];
863 h[1][1] = H12[1][e][b];
864 h[1][2] = H21[1][e][b];
865 h[1][3] = H22[1][e][b];
869 h_step[0][0] = (H11[0][e+1][b] - h[0][0]) * width;
870 h_step[0][1] = (H12[0][e+1][b] - h[0][1]) * width;
871 h_step[0][2] = (H21[0][e+1][b] - h[0][2]) * width;
872 h_step[0][3] = (H22[0][e+1][b] - h[0][3]) * width;
873 if (!PS_BASELINE && ps->enable_ipdopd) {
874 h_step[1][0] = (H11[1][e+1][b] - h[1][0]) * width;
875 h_step[1][1] = (H12[1][e+1][b] - h[1][1]) * width;
876 h_step[1][2] = (H21[1][e+1][b] - h[1][2]) * width;
877 h_step[1][3] = (H22[1][e+1][b] - h[1][3]) * width;
879 ps->dsp.stereo_interpolate[!PS_BASELINE && ps->enable_ipdopd](
880 l[k] + start + 1, r[k] + start + 1,
881 h, h_step, stop - start);
886 int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top)
888 LOCAL_ALIGNED_16(float, Lbuf, [91], [32][2]);
889 LOCAL_ALIGNED_16(float, Rbuf, [91], [32][2]);
891 int is34 = ps->is34bands;
893 top += NR_BANDS[is34] - 64;
894 memset(ps->delay+top, 0, (NR_BANDS[is34] - top)*sizeof(ps->delay[0]));
895 if (top < NR_ALLPASS_BANDS[is34])
896 memset(ps->ap_delay + top, 0, (NR_ALLPASS_BANDS[is34] - top)*sizeof(ps->ap_delay[0]));
898 hybrid_analysis(&ps->dsp, Lbuf, ps->in_buf, L, is34, len);
899 decorrelation(ps, Rbuf, Lbuf, is34);
900 stereo_processing(ps, Lbuf, Rbuf, is34);
901 hybrid_synthesis(&ps->dsp, L, Lbuf, is34, len);
902 hybrid_synthesis(&ps->dsp, R, Rbuf, is34, len);
907 #define PS_INIT_VLC_STATIC(num, size) \
908 INIT_VLC_STATIC(&vlc_ps[num], 9, ps_tmp[num].table_size / ps_tmp[num].elem_size, \
909 ps_tmp[num].ps_bits, 1, 1, \
910 ps_tmp[num].ps_codes, ps_tmp[num].elem_size, ps_tmp[num].elem_size, \
913 #define PS_VLC_ROW(name) \
914 { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) }
916 av_cold void ff_ps_init(void) {
917 // Syntax initialization
918 static const struct {
919 const void *ps_codes, *ps_bits;
920 const unsigned int table_size, elem_size;
922 PS_VLC_ROW(huff_iid_df1),
923 PS_VLC_ROW(huff_iid_dt1),
924 PS_VLC_ROW(huff_iid_df0),
925 PS_VLC_ROW(huff_iid_dt0),
926 PS_VLC_ROW(huff_icc_df),
927 PS_VLC_ROW(huff_icc_dt),
928 PS_VLC_ROW(huff_ipd_df),
929 PS_VLC_ROW(huff_ipd_dt),
930 PS_VLC_ROW(huff_opd_df),
931 PS_VLC_ROW(huff_opd_dt),
934 PS_INIT_VLC_STATIC(0, 1544);
935 PS_INIT_VLC_STATIC(1, 832);
936 PS_INIT_VLC_STATIC(2, 1024);
937 PS_INIT_VLC_STATIC(3, 1036);
938 PS_INIT_VLC_STATIC(4, 544);
939 PS_INIT_VLC_STATIC(5, 544);
940 PS_INIT_VLC_STATIC(6, 512);
941 PS_INIT_VLC_STATIC(7, 512);
942 PS_INIT_VLC_STATIC(8, 512);
943 PS_INIT_VLC_STATIC(9, 512);
948 av_cold void ff_ps_ctx_init(PSContext *ps)
950 ff_psdsp_init(&ps->dsp);