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FFmpeg/libavcodec/aacps.c

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  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 Libav.

  6.  *

  7.  * Libav 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.  * Libav 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 Libav; 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.         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]));

  242.             }

  243.             if (ps->enable_icc) {

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

  245.             }

  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]));

  249.             }

  250.         }

  251.         ps->num_env++;

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

  253.     }

  254. 

  255. 

  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);

  260. 

  261.     //Baseline

  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));

  265.     }

  266. 

  267.     if (header)

  268.         ps->start = 1;

  269. 

  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;

  274.     }

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

  276. err:

  277.     ps->start = 0;

  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));

  283.     return bits_left;

  284. }

  285. 

  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)

  289. {

  290.     int i, j;

  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]);

  299.         }

  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;

  304.     }

  305. }

  306. 

  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],

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

  310. {

  311.     int i;

  312.     int N = 8;

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

  314. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  329.     }

  330. }

  331. 

  332. static void hybrid4_8_12_cx(PSDSPContext *dsp,

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

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

  335. {

  336.     int i;

  337. 

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

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

  340.     }

  341. }

  342. 

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

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

  345.                             int is34, int len)

  346. {

  347.     int i, j;

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

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

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

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

  352.         }

  353.     }

  354.     if (is34) {

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

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

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

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

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

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

  361.     } else {

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

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

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

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

  366.     }

  367.     //update in_buf

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

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

  370.     }

  371. }

  372. 

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

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

  375. {

  376.     int i, n;

  377.     if (is34) {

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

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

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

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

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

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

  384.             }

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

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

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

  388.             }

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

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

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

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

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

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

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

  396.             }

  397.         }

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

  399.     } else {

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

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

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

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

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

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

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

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

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

  409.         }

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

  411.     }

  412. }

  413. 

  414. /// All-pass filter decay slope

  415. #define DECAY_SLOPE      0.05f

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

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

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

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

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

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

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

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

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

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

  426. 

  427. /** Table 8.46 */

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

  429. {

  430.     int b;

  431.     if (full)

  432.         b = 9;

  433.     else {

  434.         b = 4;

  435.         par_mapped[10] = 0;

  436.     }

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

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

  439.     }

  440. }

  441. 

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

  443. {

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

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

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

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

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

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

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

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

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

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

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

  455.     if (full) {

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

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

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

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

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

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

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

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

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

  465.     }

  466. }

  467. 

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

  469. {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  490. }

  491. 

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

  493. {

  494.     if (full) {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  513.     } else {

  514.         par_mapped[16] =      0;

  515.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  532. }

  533. 

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

  535. {

  536.     if (full) {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  554.     }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  572. }

  573. 

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

  575. {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  609.     par[ 0] =  par[ 0];

  610. }

  611. 

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

  613. {

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

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

  616.     float *peak_decay_nrg = ps->peak_decay_nrg;

  617.     float *power_smooth = ps->power_smooth;

  618.     float *peak_decay_diff_smooth = ps->peak_decay_diff_smooth;

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

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

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

  622.     const float peak_decay_factor = 0.76592833836465f;

  623.     const float transient_impact  = 1.5f;

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

  625.     int i, k, m, n;

  626.     int n0 = 0, nL = 32;

  627. 

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

  629. 

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

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

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

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

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

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

  636.     }

  637. 

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

  639.         int i = k_to_i[k];

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

  641.     }

  642. 

  643.     //Transient detection

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

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

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

  647.             float denom;

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

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

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

  651.             denom = transient_impact * peak_decay_diff_smooth[i];

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

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

  654.         }

  655.     }

  656. 

  657.     //Decorrelation and transient reduction

  658.     //                         PS_AP_LINKS - 1

  659.     //                               -----

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

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

  662.     //                                | | 1 - a[m]*g_decay_slope[k]*Q_fract_allpass[k][m]*z^-link_delay[m]

  663.     //                               m = 0

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

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

  666.         int b = k_to_i[k];

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

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

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

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

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

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

  673.         }

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

  675.                             phi_fract[is34][k],

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

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

  678.     }

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

  680.         int i = k_to_i[k];

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

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

  683.         //H = delay 14

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

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

  686.     }

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

  688.         int i = k_to_i[k];

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

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

  691.         //H = delay 1

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

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

  694.     }

  695. }

  696. 

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

  698.                     int8_t           (*par)[PS_MAX_NR_IIDICC],

  699.                     int num_par, int num_env, int full)

  700. {

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

  702.     int e;

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

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

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

  706.         }

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

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

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

  710.         }

  711.     } else {

  712.         *p_par_mapped = par;

  713.     }

  714. }

  715. 

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

  717.                     int8_t           (*par)[PS_MAX_NR_IIDICC],

  718.                     int num_par, int num_env, int full)

  719. {

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

  721.     int e;

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

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

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

  725.         }

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

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

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

  729.         }

  730.     } else {

  731.         *p_par_mapped = par;

  732.     }

  733. }

  734. 

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

  736. {

  737.     int e, b, k;

  738. 

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

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

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

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

  743.     int8_t *opd_hist = ps->opd_hist;

  744.     int8_t *ipd_hist = ps->ipd_hist;

  745.     int8_t iid_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];

  746.     int8_t icc_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];

  747.     int8_t ipd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];

  748.     int8_t opd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];

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

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

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

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

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

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

  755. 

  756.     //Remapping

  757.     if (ps->num_env_old) {

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

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

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

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

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

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

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

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

  766.     }

  767. 

  768.     if (is34) {

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

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

  771.         if (ps->enable_ipdopd) {

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

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

  774.         }

  775.         if (!ps->is34bands_old) {

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

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

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

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

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

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

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

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

  784.             ipdopd_reset(ipd_hist, opd_hist);

  785.         }

  786.     } else {

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

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

  789.         if (ps->enable_ipdopd) {

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

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

  792.         }

  793.         if (ps->is34bands_old) {

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

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

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

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

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

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

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

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

  802.             ipdopd_reset(ipd_hist, opd_hist);

  803.         }

  804.     }

  805. 

  806.     //Mixing

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

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

  809.             float h11, h12, h21, h22;

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

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

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

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

  814.             if (!PS_BASELINE && ps->enable_ipdopd && b < ps->nr_ipdopd_par) {

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

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

  817.                 float h11i, h12i, h21i, h22i;

  818.                 float ipd_adj_re, ipd_adj_im;

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

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

  821.                 float opd_re = pd_re_smooth[opd_idx];

  822.                 float opd_im = pd_im_smooth[opd_idx];

  823.                 float ipd_re = pd_re_smooth[ipd_idx];

  824.                 float ipd_im = pd_im_smooth[ipd_idx];

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

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

  827. 

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

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

  830.                 h11i = h11 * opd_im;

  831.                 h11  = h11 * opd_re;

  832.                 h12i = h12 * ipd_adj_im;

  833.                 h12  = h12 * ipd_adj_re;

  834.                 h21i = h21 * opd_im;

  835.                 h21  = h21 * opd_re;

  836.                 h22i = h22 * ipd_adj_im;

  837.                 h22  = h22 * ipd_adj_re;

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

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

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

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

  842.             }

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

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

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

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

  847.         }

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

  849.             float h[2][4];

  850.             float h_step[2][4];

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

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

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

  854.             b = k_to_i[k];

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

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

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

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

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

  860.             //Is this necessary? ps_04_new seems unchanged

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

  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];

  866.             } else {

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

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

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

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

  871.             }

  872.             }

  873.             //Interpolation

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

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

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

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

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

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

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

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

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

  883.             }

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

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

  886.                 h, h_step, stop - start);

  887.         }

  888.     }

  889. }

  890. 

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

  892. {

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

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

  895.     const int len = 32;

  896.     int is34 = ps->is34bands;

  897. 

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

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

  900.     if (top < NR_ALLPASS_BANDS[is34])

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

  902. 

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

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

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

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

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

  908. 

  909.     return 0;

  910. }

  911. 

  912. #define PS_INIT_VLC_STATIC(num, size) \

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

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

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

  916.                     size);

  917. 

  918. #define PS_VLC_ROW(name) \

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

  920. 

  921. av_cold void ff_ps_init(void) {

  922.     // Syntax initialization

  923.     static const struct {

  924.         const void *ps_codes, *ps_bits;

  925.         const unsigned int table_size, elem_size;

  926.     } ps_tmp[] = {

  927.         PS_VLC_ROW(huff_iid_df1),

  928.         PS_VLC_ROW(huff_iid_dt1),

  929.         PS_VLC_ROW(huff_iid_df0),

  930.         PS_VLC_ROW(huff_iid_dt0),

  931.         PS_VLC_ROW(huff_icc_df),

  932.         PS_VLC_ROW(huff_icc_dt),

  933.         PS_VLC_ROW(huff_ipd_df),

  934.         PS_VLC_ROW(huff_ipd_dt),

  935.         PS_VLC_ROW(huff_opd_df),

  936.         PS_VLC_ROW(huff_opd_dt),

  937.     };

  938. 

  939.     PS_INIT_VLC_STATIC(0, 1544);

  940.     PS_INIT_VLC_STATIC(1,  832);

  941.     PS_INIT_VLC_STATIC(2, 1024);

  942.     PS_INIT_VLC_STATIC(3, 1036);

  943.     PS_INIT_VLC_STATIC(4,  544);

  944.     PS_INIT_VLC_STATIC(5,  544);

  945.     PS_INIT_VLC_STATIC(6,  512);

  946.     PS_INIT_VLC_STATIC(7,  512);

  947.     PS_INIT_VLC_STATIC(8,  512);

  948.     PS_INIT_VLC_STATIC(9,  512);

  949. 

  950.     ps_tableinit();

  951. }

  952. 

  953. av_cold void ff_ps_ctx_init(PSContext *ps)

  954. {

  955.     ff_psdsp_init(&ps->dsp);

  956. }