falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
58365 Commits
32 Branches
367MB
Tree: 9e22b8aca0
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '9e22b8aca0'
${ noResults }
FFmpeg/libavcodec/aacps.c

974 lines
35KB
Raw Blame History 

  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. 

  22. #include <stdint.h>

  23. #include "libavutil/common.h"

  24. #include "libavutil/internal.h"

  25. #include "libavutil/mathematics.h"

  26. #include "avcodec.h"

  27. #include "get_bits.h"

  28. #include "aacps.h"

  29. #include "aacps_tablegen.h"

  30. #include "aacpsdata.c"

  31. 

  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

  35. 

  36. #define numQMFSlots 32 //numTimeSlots * RATE

  37. 

  38. static const int8_t num_env_tab[2][4] = {

  39.     { 0, 1, 2, 4, },

  40.     { 1, 2, 3, 4, },

  41. };

  42. 

  43. static const int8_t nr_iidicc_par_tab[] = {

  44.     10, 20, 34, 10, 20, 34,

  45. };

  46. 

  47. static const int8_t nr_iidopd_par_tab[] = {

  48.      5, 11, 17,  5, 11, 17,

  49. };

  50. 

  51. enum {

  52.     huff_iid_df1,

  53.     huff_iid_dt1,

  54.     huff_iid_df0,

  55.     huff_iid_dt0,

  56.     huff_icc_df,

  57.     huff_icc_dt,

  58.     huff_ipd_df,

  59.     huff_ipd_dt,

  60.     huff_opd_df,

  61.     huff_opd_dt,

  62. };

  63. 

  64. static const int huff_iid[] = {

  65.     huff_iid_df0,

  66.     huff_iid_df1,

  67.     huff_iid_dt0,

  68.     huff_iid_dt1,

  69. };

  70. 

  71. static VLC vlc_ps[10];

  72. 

  73. #define READ_PAR_DATA(PAR, OFFSET, MASK, ERR_CONDITION) \

  74. /** \

  75.  * Read Inter-channel Intensity Difference/Inter-Channel Coherence/ \

  76.  * Inter-channel Phase Difference/Overall Phase Difference parameters from the \

  77.  * bitstream. \

  78.  * \

  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 \

  85.  */ \

  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) \

  88. { \

  89.     int b, num = ps->nr_ ## PAR ## _par; \

  90.     VLC_TYPE (*vlc_table)[2] = vlc_ps[table_idx].table; \

  91.     if (dt) { \

  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; \

  97.             PAR[e][b] = val; \

  98.             if (ERR_CONDITION) \

  99.                 goto err; \

  100.         } \

  101.     } else { \

  102.         int val = 0; \

  103.         for (b = 0; b < num; b++) { \

  104.             val += get_vlc2(gb, vlc_table, 9, 3) - OFFSET; \

  105.             if (MASK) val &= MASK; \

  106.             PAR[e][b] = val; \

  107.             if (ERR_CONDITION) \

  108.                 goto err; \

  109.         } \

  110.     } \

  111.     return 0; \

  112. err: \

  113.     av_log(avctx, AV_LOG_ERROR, "illegal "#PAR"\n"); \

  114.     return -1; \

  115. }

  116. 

  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)

  120. 

  121. static int ps_read_extension_data(GetBitContext *gb, PSContext *ps, int ps_extension_id)

  122. {

  123.     int e;

  124.     int count = get_bits_count(gb);

  125. 

  126.     if (ps_extension_id)

  127.         return 0;

  128. 

  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);

  134.             dt = get_bits1(gb);

  135.             read_ipdopd_data(NULL, gb, ps, ps->opd_par, dt ? huff_opd_dt : huff_opd_df, e, dt);

  136.         }

  137.     }

  138.     skip_bits1(gb);      //reserved_ps

  139.     return get_bits_count(gb) - count;

  140. }

  141. 

  142. static void ipdopd_reset(int8_t *ipd_hist, int8_t *opd_hist)

  143. {

  144.     int i;

  145.     for (i = 0; i < PS_MAX_NR_IPDOPD; i++) {

  146.         opd_hist[i] = 0;

  147.         ipd_hist[i] = 0;

  148.     }

  149. }

  150. 

  151. int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb_host, PSContext *ps, int bits_left)

  152. {

  153.     int e;

  154.     int bit_count_start = get_bits_count(gb_host);

  155.     int header;

  156.     int bits_consumed;

  157.     GetBitContext gbc = *gb_host, *gb = &gbc;

  158. 

  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);

  164.             if (iid_mode > 5) {

  165.                 av_log(avctx, AV_LOG_ERROR, "iid_mode %d is reserved.\n",

  166.                        iid_mode);

  167.                 goto err;

  168.             }

  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];

  172.         }

  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",

  178.                        ps->icc_mode);

  179.                 goto err;

  180.             }

  181.             ps->nr_icc_par = nr_iidicc_par_tab[ps->icc_mode];

  182.         }

  183.         ps->enable_ext = get_bits1(gb);

  184.     }

  185. 

  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)];

  189. 

  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);

  194.     } else

  195.         for (e = 1; e <= ps->num_env; e++)

  196.             ps->border_position[e] = (e * numQMFSlots >> ff_log2_tab[ps->num_env]) - 1;

  197. 

  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))

  202.                 goto err;

  203.         }

  204.     } else

  205.         memset(ps->iid_par, 0, sizeof(ps->iid_par));

  206. 

  207.     if (ps->enable_icc)

  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))

  211.                 goto err;

  212.         }

  213.     else

  214.         memset(ps->icc_par, 0, sizeof(ps->icc_par));

  215. 

  216.     if (ps->enable_ext) {

  217.         int cnt = get_bits(gb, 4);

  218.         if (cnt == 15) {

  219.             cnt += get_bits(gb, 8);

  220.         }

  221.         cnt *= 8;

  222.         while (cnt > 7) {

  223.             int ps_extension_id = get_bits(gb, 2);

  224.             cnt -= 2 + ps_read_extension_data(gb, ps, ps_extension_id);

  225.         }

  226.         if (cnt < 0) {

  227.             av_log(avctx, AV_LOG_ERROR, "ps extension overflow %d\n", cnt);

  228.             goto err;

  229.         }

  230.         skip_bits(gb, cnt);

  231.     }

  232. 

  233.     ps->enable_ipdopd &= !PS_BASELINE;

  234. 

  235.     //Fix up envelopes

  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.         int b;

  240.         if (source >= 0 && source != ps->num_env) {

  241.             if (ps->enable_iid) {

  242.                 memcpy(ps->iid_par+ps->num_env, ps->iid_par+source, sizeof(ps->iid_par[0]));

  243.             }

  244.             if (ps->enable_icc) {

  245.                 memcpy(ps->icc_par+ps->num_env, ps->icc_par+source, sizeof(ps->icc_par[0]));

  246.             }

  247.             if (ps->enable_ipdopd) {

  248.                 memcpy(ps->ipd_par+ps->num_env, ps->ipd_par+source, sizeof(ps->ipd_par[0]));

  249.                 memcpy(ps->opd_par+ps->num_env, ps->opd_par+source, sizeof(ps->opd_par[0]));

  250.             }

  251.         }

  252.         if (ps->enable_iid){

  253.             for (b = 0; b < ps->nr_iid_par; b++) {

  254.                 if (FFABS(ps->iid_par[ps->num_env][b]) > 7 + 8 * ps->iid_quant) {

  255.                     av_log(avctx, AV_LOG_ERROR, "iid_par invalid\n");

  256.                     goto err;

  257.                 }

  258.             }

  259.         }

  260.         if (ps->enable_icc){

  261.             for (b = 0; b < ps->nr_iid_par; b++) {

  262.                 if (ps->icc_par[ps->num_env][b] > 7U) {

  263.                     av_log(avctx, AV_LOG_ERROR, "icc_par invalid\n");

  264.                     goto err;

  265.                 }

  266.             }

  267.         }

  268.         ps->num_env++;

  269.         ps->border_position[ps->num_env] = numQMFSlots - 1;

  270.     }

  271. 

  272. 

  273.     ps->is34bands_old = ps->is34bands;

  274.     if (!PS_BASELINE && (ps->enable_iid || ps->enable_icc))

  275.         ps->is34bands = (ps->enable_iid && ps->nr_iid_par == 34) ||

  276.                         (ps->enable_icc && ps->nr_icc_par == 34);

  277. 

  278.     //Baseline

  279.     if (!ps->enable_ipdopd) {

  280.         memset(ps->ipd_par, 0, sizeof(ps->ipd_par));

  281.         memset(ps->opd_par, 0, sizeof(ps->opd_par));

  282.     }

  283. 

  284.     if (header)

  285.         ps->start = 1;

  286. 

  287.     bits_consumed = get_bits_count(gb) - bit_count_start;

  288.     if (bits_consumed <= bits_left) {

  289.         skip_bits_long(gb_host, bits_consumed);

  290.         return bits_consumed;

  291.     }

  292.     av_log(avctx, AV_LOG_ERROR, "Expected to read %d PS bits actually read %d.\n", bits_left, bits_consumed);

  293. err:

  294.     ps->start = 0;

  295.     skip_bits_long(gb_host, bits_left);

  296.     memset(ps->iid_par, 0, sizeof(ps->iid_par));

  297.     memset(ps->icc_par, 0, sizeof(ps->icc_par));

  298.     memset(ps->ipd_par, 0, sizeof(ps->ipd_par));

  299.     memset(ps->opd_par, 0, sizeof(ps->opd_par));

  300.     return bits_left;

  301. }

  302. 

  303. /** Split one subband into 2 subsubbands with a symmetric real filter.

  304.  * The filter must have its non-center even coefficients equal to zero. */

  305. static void hybrid2_re(float (*in)[2], float (*out)[32][2], const float filter[8], int len, int reverse)

  306. {

  307.     int i, j;

  308.     for (i = 0; i < len; i++, in++) {

  309.         float re_in = filter[6] * in[6][0];          //real inphase

  310.         float re_op = 0.0f;                          //real out of phase

  311.         float im_in = filter[6] * in[6][1];          //imag inphase

  312.         float im_op = 0.0f;                          //imag out of phase

  313.         for (j = 0; j < 6; j += 2) {

  314.             re_op += filter[j+1] * (in[j+1][0] + in[12-j-1][0]);

  315.             im_op += filter[j+1] * (in[j+1][1] + in[12-j-1][1]);

  316.         }

  317.         out[ reverse][i][0] = re_in + re_op;

  318.         out[ reverse][i][1] = im_in + im_op;

  319.         out[!reverse][i][0] = re_in - re_op;

  320.         out[!reverse][i][1] = im_in - im_op;

  321.     }

  322. }

  323. 

  324. /** Split one subband into 6 subsubbands with a complex filter */

  325. static void hybrid6_cx(PSDSPContext *dsp, float (*in)[2], float (*out)[32][2],

  326.                        TABLE_CONST float (*filter)[8][2], int len)

  327. {

  328.     int i;

  329.     int N = 8;

  330.     LOCAL_ALIGNED_16(float, temp, [8], [2]);

  331. 

  332.     for (i = 0; i < len; i++, in++) {

  333.         dsp->hybrid_analysis(temp, in, (const float (*)[8][2]) filter, 1, N);

  334.         out[0][i][0] = temp[6][0];

  335.         out[0][i][1] = temp[6][1];

  336.         out[1][i][0] = temp[7][0];

  337.         out[1][i][1] = temp[7][1];

  338.         out[2][i][0] = temp[0][0];

  339.         out[2][i][1] = temp[0][1];

  340.         out[3][i][0] = temp[1][0];

  341.         out[3][i][1] = temp[1][1];

  342.         out[4][i][0] = temp[2][0] + temp[5][0];

  343.         out[4][i][1] = temp[2][1] + temp[5][1];

  344.         out[5][i][0] = temp[3][0] + temp[4][0];

  345.         out[5][i][1] = temp[3][1] + temp[4][1];

  346.     }

  347. }

  348. 

  349. static void hybrid4_8_12_cx(PSDSPContext *dsp,

  350.                             float (*in)[2], float (*out)[32][2],

  351.                             TABLE_CONST float (*filter)[8][2], int N, int len)

  352. {

  353.     int i;

  354. 

  355.     for (i = 0; i < len; i++, in++) {

  356.         dsp->hybrid_analysis(out[0] + i, in, (const float (*)[8][2]) filter, 32, N);

  357.     }

  358. }

  359. 

  360. static void hybrid_analysis(PSDSPContext *dsp, float out[91][32][2],

  361.                             float in[5][44][2], float L[2][38][64],

  362.                             int is34, int len)

  363. {

  364.     int i, j;

  365.     for (i = 0; i < 5; i++) {

  366.         for (j = 0; j < 38; j++) {

  367.             in[i][j+6][0] = L[0][j][i];

  368.             in[i][j+6][1] = L[1][j][i];

  369.         }

  370.     }

  371.     if (is34) {

  372.         hybrid4_8_12_cx(dsp, in[0], out,    f34_0_12, 12, len);

  373.         hybrid4_8_12_cx(dsp, in[1], out+12, f34_1_8,   8, len);

  374.         hybrid4_8_12_cx(dsp, in[2], out+20, f34_2_4,   4, len);

  375.         hybrid4_8_12_cx(dsp, in[3], out+24, f34_2_4,   4, len);

  376.         hybrid4_8_12_cx(dsp, in[4], out+28, f34_2_4,   4, len);

  377.         dsp->hybrid_analysis_ileave(out + 27, L, 5, len);

  378.     } else {

  379.         hybrid6_cx(dsp, in[0], out, f20_0_8, len);

  380.         hybrid2_re(in[1], out+6, g1_Q2, len, 1);

  381.         hybrid2_re(in[2], out+8, g1_Q2, len, 0);

  382.         dsp->hybrid_analysis_ileave(out + 7, L, 3, len);

  383.     }

  384.     //update in_buf

  385.     for (i = 0; i < 5; i++) {

  386.         memcpy(in[i], in[i]+32, 6 * sizeof(in[i][0]));

  387.     }

  388. }

  389. 

  390. static void hybrid_synthesis(PSDSPContext *dsp, float out[2][38][64],

  391.                              float in[91][32][2], int is34, int len)

  392. {

  393.     int i, n;

  394.     if (is34) {

  395.         for (n = 0; n < len; n++) {

  396.             memset(out[0][n], 0, 5*sizeof(out[0][n][0]));

  397.             memset(out[1][n], 0, 5*sizeof(out[1][n][0]));

  398.             for (i = 0; i < 12; i++) {

  399.                 out[0][n][0] += in[   i][n][0];

  400.                 out[1][n][0] += in[   i][n][1];

  401.             }

  402.             for (i = 0; i < 8; i++) {

  403.                 out[0][n][1] += in[12+i][n][0];

  404.                 out[1][n][1] += in[12+i][n][1];

  405.             }

  406.             for (i = 0; i < 4; i++) {

  407.                 out[0][n][2] += in[20+i][n][0];

  408.                 out[1][n][2] += in[20+i][n][1];

  409.                 out[0][n][3] += in[24+i][n][0];

  410.                 out[1][n][3] += in[24+i][n][1];

  411.                 out[0][n][4] += in[28+i][n][0];

  412.                 out[1][n][4] += in[28+i][n][1];

  413.             }

  414.         }

  415.         dsp->hybrid_synthesis_deint(out, in + 27, 5, len);

  416.     } else {

  417.         for (n = 0; n < len; n++) {

  418.             out[0][n][0] = in[0][n][0] + in[1][n][0] + in[2][n][0] +

  419.                            in[3][n][0] + in[4][n][0] + in[5][n][0];

  420.             out[1][n][0] = in[0][n][1] + in[1][n][1] + in[2][n][1] +

  421.                            in[3][n][1] + in[4][n][1] + in[5][n][1];

  422.             out[0][n][1] = in[6][n][0] + in[7][n][0];

  423.             out[1][n][1] = in[6][n][1] + in[7][n][1];

  424.             out[0][n][2] = in[8][n][0] + in[9][n][0];

  425.             out[1][n][2] = in[8][n][1] + in[9][n][1];

  426.         }

  427.         dsp->hybrid_synthesis_deint(out, in + 7, 3, len);

  428.     }

  429. }

  430. 

  431. /// All-pass filter decay slope

  432. #define DECAY_SLOPE      0.05f

  433. /// Number of frequency bands that can be addressed by the parameter index, b(k)

  434. static const int   NR_PAR_BANDS[]      = { 20, 34 };

  435. /// Number of frequency bands that can be addressed by the sub subband index, k

  436. static const int   NR_BANDS[]          = { 71, 91 };

  437. /// Start frequency band for the all-pass filter decay slope

  438. static const int   DECAY_CUTOFF[]      = { 10, 32 };

  439. /// Number of all-pass filer bands

  440. static const int   NR_ALLPASS_BANDS[]  = { 30, 50 };

  441. /// First stereo band using the short one sample delay

  442. static const int   SHORT_DELAY_BAND[]  = { 42, 62 };

  443. 

  444. /** Table 8.46 */

  445. static void map_idx_10_to_20(int8_t *par_mapped, const int8_t *par, int full)

  446. {

  447.     int b;

  448.     if (full)

  449.         b = 9;

  450.     else {

  451.         b = 4;

  452.         par_mapped[10] = 0;

  453.     }

  454.     for (; b >= 0; b--) {

  455.         par_mapped[2*b+1] = par_mapped[2*b] = par[b];

  456.     }

  457. }

  458. 

  459. static void map_idx_34_to_20(int8_t *par_mapped, const int8_t *par, int full)

  460. {

  461.     par_mapped[ 0] = (2*par[ 0] +   par[ 1]) / 3;

  462.     par_mapped[ 1] = (  par[ 1] + 2*par[ 2]) / 3;

  463.     par_mapped[ 2] = (2*par[ 3] +   par[ 4]) / 3;

  464.     par_mapped[ 3] = (  par[ 4] + 2*par[ 5]) / 3;

  465.     par_mapped[ 4] = (  par[ 6] +   par[ 7]) / 2;

  466.     par_mapped[ 5] = (  par[ 8] +   par[ 9]) / 2;

  467.     par_mapped[ 6] =    par[10];

  468.     par_mapped[ 7] =    par[11];

  469.     par_mapped[ 8] = (  par[12] +   par[13]) / 2;

  470.     par_mapped[ 9] = (  par[14] +   par[15]) / 2;

  471.     par_mapped[10] =    par[16];

  472.     if (full) {

  473.         par_mapped[11] =    par[17];

  474.         par_mapped[12] =    par[18];

  475.         par_mapped[13] =    par[19];

  476.         par_mapped[14] = (  par[20] +   par[21]) / 2;

  477.         par_mapped[15] = (  par[22] +   par[23]) / 2;

  478.         par_mapped[16] = (  par[24] +   par[25]) / 2;

  479.         par_mapped[17] = (  par[26] +   par[27]) / 2;

  480.         par_mapped[18] = (  par[28] +   par[29] +   par[30] +   par[31]) / 4;

  481.         par_mapped[19] = (  par[32] +   par[33]) / 2;

  482.     }

  483. }

  484. 

  485. static void map_val_34_to_20(float par[PS_MAX_NR_IIDICC])

  486. {

  487.     par[ 0] = (2*par[ 0] +   par[ 1]) * 0.33333333f;

  488.     par[ 1] = (  par[ 1] + 2*par[ 2]) * 0.33333333f;

  489.     par[ 2] = (2*par[ 3] +   par[ 4]) * 0.33333333f;

  490.     par[ 3] = (  par[ 4] + 2*par[ 5]) * 0.33333333f;

  491.     par[ 4] = (  par[ 6] +   par[ 7]) * 0.5f;

  492.     par[ 5] = (  par[ 8] +   par[ 9]) * 0.5f;

  493.     par[ 6] =    par[10];

  494.     par[ 7] =    par[11];

  495.     par[ 8] = (  par[12] +   par[13]) * 0.5f;

  496.     par[ 9] = (  par[14] +   par[15]) * 0.5f;

  497.     par[10] =    par[16];

  498.     par[11] =    par[17];

  499.     par[12] =    par[18];

  500.     par[13] =    par[19];

  501.     par[14] = (  par[20] +   par[21]) * 0.5f;

  502.     par[15] = (  par[22] +   par[23]) * 0.5f;

  503.     par[16] = (  par[24] +   par[25]) * 0.5f;

  504.     par[17] = (  par[26] +   par[27]) * 0.5f;

  505.     par[18] = (  par[28] +   par[29] +   par[30] +   par[31]) * 0.25f;

  506.     par[19] = (  par[32] +   par[33]) * 0.5f;

  507. }

  508. 

  509. static void map_idx_10_to_34(int8_t *par_mapped, const int8_t *par, int full)

  510. {

  511.     if (full) {

  512.         par_mapped[33] = par[9];

  513.         par_mapped[32] = par[9];

  514.         par_mapped[31] = par[9];

  515.         par_mapped[30] = par[9];

  516.         par_mapped[29] = par[9];

  517.         par_mapped[28] = par[9];

  518.         par_mapped[27] = par[8];

  519.         par_mapped[26] = par[8];

  520.         par_mapped[25] = par[8];

  521.         par_mapped[24] = par[8];

  522.         par_mapped[23] = par[7];

  523.         par_mapped[22] = par[7];

  524.         par_mapped[21] = par[7];

  525.         par_mapped[20] = par[7];

  526.         par_mapped[19] = par[6];

  527.         par_mapped[18] = par[6];

  528.         par_mapped[17] = par[5];

  529.         par_mapped[16] = par[5];

  530.     } else {

  531.         par_mapped[16] =      0;

  532.     }

  533.     par_mapped[15] = par[4];

  534.     par_mapped[14] = par[4];

  535.     par_mapped[13] = par[4];

  536.     par_mapped[12] = par[4];

  537.     par_mapped[11] = par[3];

  538.     par_mapped[10] = par[3];

  539.     par_mapped[ 9] = par[2];

  540.     par_mapped[ 8] = par[2];

  541.     par_mapped[ 7] = par[2];

  542.     par_mapped[ 6] = par[2];

  543.     par_mapped[ 5] = par[1];

  544.     par_mapped[ 4] = par[1];

  545.     par_mapped[ 3] = par[1];

  546.     par_mapped[ 2] = par[0];

  547.     par_mapped[ 1] = par[0];

  548.     par_mapped[ 0] = par[0];

  549. }

  550. 

  551. static void map_idx_20_to_34(int8_t *par_mapped, const int8_t *par, int full)

  552. {

  553.     if (full) {

  554.         par_mapped[33] =  par[19];

  555.         par_mapped[32] =  par[19];

  556.         par_mapped[31] =  par[18];

  557.         par_mapped[30] =  par[18];

  558.         par_mapped[29] =  par[18];

  559.         par_mapped[28] =  par[18];

  560.         par_mapped[27] =  par[17];

  561.         par_mapped[26] =  par[17];

  562.         par_mapped[25] =  par[16];

  563.         par_mapped[24] =  par[16];

  564.         par_mapped[23] =  par[15];

  565.         par_mapped[22] =  par[15];

  566.         par_mapped[21] =  par[14];

  567.         par_mapped[20] =  par[14];

  568.         par_mapped[19] =  par[13];

  569.         par_mapped[18] =  par[12];

  570.         par_mapped[17] =  par[11];

  571.     }

  572.     par_mapped[16] =  par[10];

  573.     par_mapped[15] =  par[ 9];

  574.     par_mapped[14] =  par[ 9];

  575.     par_mapped[13] =  par[ 8];

  576.     par_mapped[12] =  par[ 8];

  577.     par_mapped[11] =  par[ 7];

  578.     par_mapped[10] =  par[ 6];

  579.     par_mapped[ 9] =  par[ 5];

  580.     par_mapped[ 8] =  par[ 5];

  581.     par_mapped[ 7] =  par[ 4];

  582.     par_mapped[ 6] =  par[ 4];

  583.     par_mapped[ 5] =  par[ 3];

  584.     par_mapped[ 4] = (par[ 2] + par[ 3]) / 2;

  585.     par_mapped[ 3] =  par[ 2];

  586.     par_mapped[ 2] =  par[ 1];

  587.     par_mapped[ 1] = (par[ 0] + par[ 1]) / 2;

  588.     par_mapped[ 0] =  par[ 0];

  589. }

  590. 

  591. static void map_val_20_to_34(float par[PS_MAX_NR_IIDICC])

  592. {

  593.     par[33] =  par[19];

  594.     par[32] =  par[19];

  595.     par[31] =  par[18];

  596.     par[30] =  par[18];

  597.     par[29] =  par[18];

  598.     par[28] =  par[18];

  599.     par[27] =  par[17];

  600.     par[26] =  par[17];

  601.     par[25] =  par[16];

  602.     par[24] =  par[16];

  603.     par[23] =  par[15];

  604.     par[22] =  par[15];

  605.     par[21] =  par[14];

  606.     par[20] =  par[14];

  607.     par[19] =  par[13];

  608.     par[18] =  par[12];

  609.     par[17] =  par[11];

  610.     par[16] =  par[10];

  611.     par[15] =  par[ 9];

  612.     par[14] =  par[ 9];

  613.     par[13] =  par[ 8];

  614.     par[12] =  par[ 8];

  615.     par[11] =  par[ 7];

  616.     par[10] =  par[ 6];

  617.     par[ 9] =  par[ 5];

  618.     par[ 8] =  par[ 5];

  619.     par[ 7] =  par[ 4];

  620.     par[ 6] =  par[ 4];

  621.     par[ 5] =  par[ 3];

  622.     par[ 4] = (par[ 2] + par[ 3]) * 0.5f;

  623.     par[ 3] =  par[ 2];

  624.     par[ 2] =  par[ 1];

  625.     par[ 1] = (par[ 0] + par[ 1]) * 0.5f;

  626. }

  627. 

  628. static void decorrelation(PSContext *ps, float (*out)[32][2], const float (*s)[32][2], int is34)

  629. {

  630.     LOCAL_ALIGNED_16(float, power, [34], [PS_QMF_TIME_SLOTS]);

  631.     LOCAL_ALIGNED_16(float, transient_gain, [34], [PS_QMF_TIME_SLOTS]);

  632.     float *peak_decay_nrg = ps->peak_decay_nrg;

  633.     float *power_smooth = ps->power_smooth;

  634.     float *peak_decay_diff_smooth = ps->peak_decay_diff_smooth;

  635.     float (*delay)[PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2] = ps->delay;

  636.     float (*ap_delay)[PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2] = ps->ap_delay;

  637.     const int8_t *k_to_i = is34 ? k_to_i_34 : k_to_i_20;

  638.     const float peak_decay_factor = 0.76592833836465f;

  639.     const float transient_impact  = 1.5f;

  640.     const float a_smooth          = 0.25f; ///< Smoothing coefficient

  641.     int i, k, m, n;

  642.     int n0 = 0, nL = 32;

  643. 

  644.     memset(power, 0, 34 * sizeof(*power));

  645. 

  646.     if (is34 != ps->is34bands_old) {

  647.         memset(ps->peak_decay_nrg,         0, sizeof(ps->peak_decay_nrg));

  648.         memset(ps->power_smooth,           0, sizeof(ps->power_smooth));

  649.         memset(ps->peak_decay_diff_smooth, 0, sizeof(ps->peak_decay_diff_smooth));

  650.         memset(ps->delay,                  0, sizeof(ps->delay));

  651.         memset(ps->ap_delay,               0, sizeof(ps->ap_delay));

  652.     }

  653. 

  654.     for (k = 0; k < NR_BANDS[is34]; k++) {

  655.         int i = k_to_i[k];

  656.         ps->dsp.add_squares(power[i], s[k], nL - n0);

  657.     }

  658. 

  659.     //Transient detection

  660.     for (i = 0; i < NR_PAR_BANDS[is34]; i++) {

  661.         for (n = n0; n < nL; n++) {

  662.             float decayed_peak = peak_decay_factor * peak_decay_nrg[i];

  663.             float denom;

  664.             peak_decay_nrg[i] = FFMAX(decayed_peak, power[i][n]);

  665.             power_smooth[i] += a_smooth * (power[i][n] - power_smooth[i]);

  666.             peak_decay_diff_smooth[i] += a_smooth * (peak_decay_nrg[i] - power[i][n] - peak_decay_diff_smooth[i]);

  667.             denom = transient_impact * peak_decay_diff_smooth[i];

  668.             transient_gain[i][n]   = (denom > power_smooth[i]) ?

  669.                                          power_smooth[i] / denom : 1.0f;

  670.         }

  671.     }

  672. 

  673.     //Decorrelation and transient reduction

  674.     //                         PS_AP_LINKS - 1

  675.     //                               -----

  676.     //                                | |  Q_fract_allpass[k][m]*z^-link_delay[m] - a[m]*g_decay_slope[k]

  677.     //H[k][z] = z^-2 * phi_fract[k] * | | ----------------------------------------------------------------

  678.     //                                | | 1 - a[m]*g_decay_slope[k]*Q_fract_allpass[k][m]*z^-link_delay[m]

  679.     //                               m = 0

  680.     //d[k][z] (out) = transient_gain_mapped[k][z] * H[k][z] * s[k][z]

  681.     for (k = 0; k < NR_ALLPASS_BANDS[is34]; k++) {

  682.         int b = k_to_i[k];

  683.         float g_decay_slope = 1.f - DECAY_SLOPE * (k - DECAY_CUTOFF[is34]);

  684.         g_decay_slope = av_clipf(g_decay_slope, 0.f, 1.f);

  685.         memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));

  686.         memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));

  687.         for (m = 0; m < PS_AP_LINKS; m++) {

  688.             memcpy(ap_delay[k][m],   ap_delay[k][m]+numQMFSlots,           5*sizeof(ap_delay[k][m][0]));

  689.         }

  690.         ps->dsp.decorrelate(out[k], delay[k] + PS_MAX_DELAY - 2, ap_delay[k],

  691.                             phi_fract[is34][k],

  692.                             (const float (*)[2]) Q_fract_allpass[is34][k],

  693.                             transient_gain[b], g_decay_slope, nL - n0);

  694.     }

  695.     for (; k < SHORT_DELAY_BAND[is34]; k++) {

  696.         int i = k_to_i[k];

  697.         memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));

  698.         memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));

  699.         //H = delay 14

  700.         ps->dsp.mul_pair_single(out[k], delay[k] + PS_MAX_DELAY - 14,

  701.                                 transient_gain[i], nL - n0);

  702.     }

  703.     for (; k < NR_BANDS[is34]; k++) {

  704.         int i = k_to_i[k];

  705.         memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));

  706.         memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));

  707.         //H = delay 1

  708.         ps->dsp.mul_pair_single(out[k], delay[k] + PS_MAX_DELAY - 1,

  709.                                 transient_gain[i], nL - n0);

  710.     }

  711. }

  712. 

  713. static void remap34(int8_t (**p_par_mapped)[PS_MAX_NR_IIDICC],

  714.                     int8_t           (*par)[PS_MAX_NR_IIDICC],

  715.                     int num_par, int num_env, int full)

  716. {

  717.     int8_t (*par_mapped)[PS_MAX_NR_IIDICC] = *p_par_mapped;

  718.     int e;

  719.     if (num_par == 20 || num_par == 11) {

  720.         for (e = 0; e < num_env; e++) {

  721.             map_idx_20_to_34(par_mapped[e], par[e], full);

  722.         }

  723.     } else if (num_par == 10 || num_par == 5) {

  724.         for (e = 0; e < num_env; e++) {

  725.             map_idx_10_to_34(par_mapped[e], par[e], full);

  726.         }

  727.     } else {

  728.         *p_par_mapped = par;

  729.     }

  730. }

  731. 

  732. static void remap20(int8_t (**p_par_mapped)[PS_MAX_NR_IIDICC],

  733.                     int8_t           (*par)[PS_MAX_NR_IIDICC],

  734.                     int num_par, int num_env, int full)

  735. {

  736.     int8_t (*par_mapped)[PS_MAX_NR_IIDICC] = *p_par_mapped;

  737.     int e;

  738.     if (num_par == 34 || num_par == 17) {

  739.         for (e = 0; e < num_env; e++) {

  740.             map_idx_34_to_20(par_mapped[e], par[e], full);

  741.         }

  742.     } else if (num_par == 10 || num_par == 5) {

  743.         for (e = 0; e < num_env; e++) {

  744.             map_idx_10_to_20(par_mapped[e], par[e], full);

  745.         }

  746.     } else {

  747.         *p_par_mapped = par;

  748.     }

  749. }

  750. 

  751. static void stereo_processing(PSContext *ps, float (*l)[32][2], float (*r)[32][2], int is34)

  752. {

  753.     int e, b, k;

  754. 

  755.     float (*H11)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H11;

  756.     float (*H12)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H12;

  757.     float (*H21)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H21;

  758.     float (*H22)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H22;

  759.     int8_t *opd_hist = ps->opd_hist;

  760.     int8_t *ipd_hist = ps->ipd_hist;

  761.     int8_t iid_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];

  762.     int8_t icc_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];

  763.     int8_t ipd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];

  764.     int8_t opd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];

  765.     int8_t (*iid_mapped)[PS_MAX_NR_IIDICC] = iid_mapped_buf;

  766.     int8_t (*icc_mapped)[PS_MAX_NR_IIDICC] = icc_mapped_buf;

  767.     int8_t (*ipd_mapped)[PS_MAX_NR_IIDICC] = ipd_mapped_buf;

  768.     int8_t (*opd_mapped)[PS_MAX_NR_IIDICC] = opd_mapped_buf;

  769.     const int8_t *k_to_i = is34 ? k_to_i_34 : k_to_i_20;

  770.     TABLE_CONST float (*H_LUT)[8][4] = (PS_BASELINE || ps->icc_mode < 3) ? HA : HB;

  771. 

  772.     //Remapping

  773.     if (ps->num_env_old) {

  774.         memcpy(H11[0][0], H11[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H11[0][0][0]));

  775.         memcpy(H11[1][0], H11[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H11[1][0][0]));

  776.         memcpy(H12[0][0], H12[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H12[0][0][0]));

  777.         memcpy(H12[1][0], H12[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H12[1][0][0]));

  778.         memcpy(H21[0][0], H21[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H21[0][0][0]));

  779.         memcpy(H21[1][0], H21[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H21[1][0][0]));

  780.         memcpy(H22[0][0], H22[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H22[0][0][0]));

  781.         memcpy(H22[1][0], H22[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H22[1][0][0]));

  782.     }

  783. 

  784.     if (is34) {

  785.         remap34(&iid_mapped, ps->iid_par, ps->nr_iid_par, ps->num_env, 1);

  786.         remap34(&icc_mapped, ps->icc_par, ps->nr_icc_par, ps->num_env, 1);

  787.         if (ps->enable_ipdopd) {

  788.             remap34(&ipd_mapped, ps->ipd_par, ps->nr_ipdopd_par, ps->num_env, 0);

  789.             remap34(&opd_mapped, ps->opd_par, ps->nr_ipdopd_par, ps->num_env, 0);

  790.         }

  791.         if (!ps->is34bands_old) {

  792.             map_val_20_to_34(H11[0][0]);

  793.             map_val_20_to_34(H11[1][0]);

  794.             map_val_20_to_34(H12[0][0]);

  795.             map_val_20_to_34(H12[1][0]);

  796.             map_val_20_to_34(H21[0][0]);

  797.             map_val_20_to_34(H21[1][0]);

  798.             map_val_20_to_34(H22[0][0]);

  799.             map_val_20_to_34(H22[1][0]);

  800.             ipdopd_reset(ipd_hist, opd_hist);

  801.         }

  802.     } else {

  803.         remap20(&iid_mapped, ps->iid_par, ps->nr_iid_par, ps->num_env, 1);

  804.         remap20(&icc_mapped, ps->icc_par, ps->nr_icc_par, ps->num_env, 1);

  805.         if (ps->enable_ipdopd) {

  806.             remap20(&ipd_mapped, ps->ipd_par, ps->nr_ipdopd_par, ps->num_env, 0);

  807.             remap20(&opd_mapped, ps->opd_par, ps->nr_ipdopd_par, ps->num_env, 0);

  808.         }

  809.         if (ps->is34bands_old) {

  810.             map_val_34_to_20(H11[0][0]);

  811.             map_val_34_to_20(H11[1][0]);

  812.             map_val_34_to_20(H12[0][0]);

  813.             map_val_34_to_20(H12[1][0]);

  814.             map_val_34_to_20(H21[0][0]);

  815.             map_val_34_to_20(H21[1][0]);

  816.             map_val_34_to_20(H22[0][0]);

  817.             map_val_34_to_20(H22[1][0]);

  818.             ipdopd_reset(ipd_hist, opd_hist);

  819.         }

  820.     }

  821. 

  822.     //Mixing

  823.     for (e = 0; e < ps->num_env; e++) {

  824.         for (b = 0; b < NR_PAR_BANDS[is34]; b++) {

  825.             float h11, h12, h21, h22;

  826.             h11 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][0];

  827.             h12 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][1];

  828.             h21 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][2];

  829.             h22 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][3];

  830. 

  831.             if (!PS_BASELINE && ps->enable_ipdopd && 2*b <= NR_PAR_BANDS[is34]) {

  832.                 //The spec say says to only run this smoother when enable_ipdopd

  833.                 //is set but the reference decoder appears to run it constantly

  834.                 float h11i, h12i, h21i, h22i;

  835.                 float ipd_adj_re, ipd_adj_im;

  836.                 int opd_idx = opd_hist[b] * 8 + opd_mapped[e][b];

  837.                 int ipd_idx = ipd_hist[b] * 8 + ipd_mapped[e][b];

  838.                 float opd_re = pd_re_smooth[opd_idx];

  839.                 float opd_im = pd_im_smooth[opd_idx];

  840.                 float ipd_re = pd_re_smooth[ipd_idx];

  841.                 float ipd_im = pd_im_smooth[ipd_idx];

  842.                 opd_hist[b] = opd_idx & 0x3F;

  843.                 ipd_hist[b] = ipd_idx & 0x3F;

  844. 

  845.                 ipd_adj_re = opd_re*ipd_re + opd_im*ipd_im;

  846.                 ipd_adj_im = opd_im*ipd_re - opd_re*ipd_im;

  847.                 h11i = h11 * opd_im;

  848.                 h11  = h11 * opd_re;

  849.                 h12i = h12 * ipd_adj_im;

  850.                 h12  = h12 * ipd_adj_re;

  851.                 h21i = h21 * opd_im;

  852.                 h21  = h21 * opd_re;

  853.                 h22i = h22 * ipd_adj_im;

  854.                 h22  = h22 * ipd_adj_re;

  855.                 H11[1][e+1][b] = h11i;

  856.                 H12[1][e+1][b] = h12i;

  857.                 H21[1][e+1][b] = h21i;

  858.                 H22[1][e+1][b] = h22i;

  859.             }

  860.             H11[0][e+1][b] = h11;

  861.             H12[0][e+1][b] = h12;

  862.             H21[0][e+1][b] = h21;

  863.             H22[0][e+1][b] = h22;

  864.         }

  865.         for (k = 0; k < NR_BANDS[is34]; k++) {

  866.             float h[2][4];

  867.             float h_step[2][4];

  868.             int start = ps->border_position[e];

  869.             int stop  = ps->border_position[e+1];

  870.             float width = 1.f / (stop - start);

  871.             b = k_to_i[k];

  872.             h[0][0] = H11[0][e][b];

  873.             h[0][1] = H12[0][e][b];

  874.             h[0][2] = H21[0][e][b];

  875.             h[0][3] = H22[0][e][b];

  876.             if (!PS_BASELINE && ps->enable_ipdopd) {

  877.             //Is this necessary? ps_04_new seems unchanged

  878.             if ((is34 && k <= 13 && k >= 9) || (!is34 && k <= 1)) {

  879.                 h[1][0] = -H11[1][e][b];

  880.                 h[1][1] = -H12[1][e][b];

  881.                 h[1][2] = -H21[1][e][b];

  882.                 h[1][3] = -H22[1][e][b];

  883.             } else {

  884.                 h[1][0] = H11[1][e][b];

  885.                 h[1][1] = H12[1][e][b];

  886.                 h[1][2] = H21[1][e][b];

  887.                 h[1][3] = H22[1][e][b];

  888.             }

  889.             }

  890.             //Interpolation

  891.             h_step[0][0] = (H11[0][e+1][b] - h[0][0]) * width;

  892.             h_step[0][1] = (H12[0][e+1][b] - h[0][1]) * width;

  893.             h_step[0][2] = (H21[0][e+1][b] - h[0][2]) * width;

  894.             h_step[0][3] = (H22[0][e+1][b] - h[0][3]) * width;

  895.             if (!PS_BASELINE && ps->enable_ipdopd) {

  896.                 h_step[1][0] = (H11[1][e+1][b] - h[1][0]) * width;

  897.                 h_step[1][1] = (H12[1][e+1][b] - h[1][1]) * width;

  898.                 h_step[1][2] = (H21[1][e+1][b] - h[1][2]) * width;

  899.                 h_step[1][3] = (H22[1][e+1][b] - h[1][3]) * width;

  900.             }

  901.             ps->dsp.stereo_interpolate[!PS_BASELINE && ps->enable_ipdopd](

  902.                 l[k] + start + 1, r[k] + start + 1,

  903.                 h, h_step, stop - start);

  904.         }

  905.     }

  906. }

  907. 

  908. int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top)

  909. {

  910.     LOCAL_ALIGNED_16(float, Lbuf, [91], [32][2]);

  911.     LOCAL_ALIGNED_16(float, Rbuf, [91], [32][2]);

  912.     const int len = 32;

  913.     int is34 = ps->is34bands;

  914. 

  915.     top += NR_BANDS[is34] - 64;

  916.     memset(ps->delay+top, 0, (NR_BANDS[is34] - top)*sizeof(ps->delay[0]));

  917.     if (top < NR_ALLPASS_BANDS[is34])

  918.         memset(ps->ap_delay + top, 0, (NR_ALLPASS_BANDS[is34] - top)*sizeof(ps->ap_delay[0]));

  919. 

  920.     hybrid_analysis(&ps->dsp, Lbuf, ps->in_buf, L, is34, len);

  921.     decorrelation(ps, Rbuf, (const float (*)[32][2]) Lbuf, is34);

  922.     stereo_processing(ps, Lbuf, Rbuf, is34);

  923.     hybrid_synthesis(&ps->dsp, L, Lbuf, is34, len);

  924.     hybrid_synthesis(&ps->dsp, R, Rbuf, is34, len);

  925. 

  926.     return 0;

  927. }

  928. 

  929. #define PS_INIT_VLC_STATIC(num, size) \

  930.     INIT_VLC_STATIC(&vlc_ps[num], 9, ps_tmp[num].table_size / ps_tmp[num].elem_size,    \

  931.                     ps_tmp[num].ps_bits, 1, 1,                                          \

  932.                     ps_tmp[num].ps_codes, ps_tmp[num].elem_size, ps_tmp[num].elem_size, \

  933.                     size);

  934. 

  935. #define PS_VLC_ROW(name) \

  936.     { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) }

  937. 

  938. av_cold void ff_ps_init(void) {

  939.     // Syntax initialization

  940.     static const struct {

  941.         const void *ps_codes, *ps_bits;

  942.         const unsigned int table_size, elem_size;

  943.     } ps_tmp[] = {

  944.         PS_VLC_ROW(huff_iid_df1),

  945.         PS_VLC_ROW(huff_iid_dt1),

  946.         PS_VLC_ROW(huff_iid_df0),

  947.         PS_VLC_ROW(huff_iid_dt0),

  948.         PS_VLC_ROW(huff_icc_df),

  949.         PS_VLC_ROW(huff_icc_dt),

  950.         PS_VLC_ROW(huff_ipd_df),

  951.         PS_VLC_ROW(huff_ipd_dt),

  952.         PS_VLC_ROW(huff_opd_df),

  953.         PS_VLC_ROW(huff_opd_dt),

  954.     };

  955. 

  956.     PS_INIT_VLC_STATIC(0, 1544);

  957.     PS_INIT_VLC_STATIC(1,  832);

  958.     PS_INIT_VLC_STATIC(2, 1024);

  959.     PS_INIT_VLC_STATIC(3, 1036);

  960.     PS_INIT_VLC_STATIC(4,  544);

  961.     PS_INIT_VLC_STATIC(5,  544);

  962.     PS_INIT_VLC_STATIC(6,  512);

  963.     PS_INIT_VLC_STATIC(7,  512);

  964.     PS_INIT_VLC_STATIC(8,  512);

  965.     PS_INIT_VLC_STATIC(9,  512);

  966. 

  967.     ps_tableinit();

  968. }

  969. 

  970. av_cold void ff_ps_ctx_init(PSContext *ps)

  971. {

  972.     ff_psdsp_init(&ps->dsp);

  973. }