/*** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com**** This program is free software; you can redistribute it and/or modify** it under the terms of the GNU General Public License as published by** the Free Software Foundation; either version 2 of the License, or** (at your option) any later version.**** This program is distributed in the hope that it will be useful,** but WITHOUT ANY WARRANTY; without even the implied warranty of** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the** GNU General Public License for more details.**** You should have received a copy of the GNU General Public License** along with this program; if not, write to the Free Software** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.**** Any non-GPL usage of this software or parts of this software is strictly** forbidden.**** The "appropriate copyright message" mentioned in section 2c of the GPLv2** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"**** Commercial non-GPL licensing of this software is possible.** For more info contact Nero AG through Mpeg4AAClicense@nero.com.**** $Id: drm_dec.c,v 1.9 2007/11/01 12:33:30 menno Exp $**/ #include "common.h" #ifdef DRM #include "sbr_dec.h"#include "drm_dec.h"#include "bits.h" /* constants */#define DECAY_CUTOFF         3#define DECAY_SLOPE          0.05f /* type definitaions */typedef const int8_t (*drm_ps_huff_tab)[2];  /* binary search huffman tables */static const int8_t f_huffman_sa[][2] ={    { /*0*/ -15, 1 },             /* index 0: 1 bits:  x */    { 2, 3 },                     /* index 1: 2 bits:  1x */    { /*7*/ -8, 4 },              /* index 2: 3 bits:  10x */    { 5, 6 },                     /* index 3: 3 bits:  11x */    { /*1*/ -14, /*-1*/ -16 },    /* index 4: 4 bits:  101x */    { /*-2*/ -17, 7 },            /* index 5: 4 bits:  110x */    { 8, 9 },                     /* index 6: 4 bits:  111x */    { /*2*/ -13, /*-3*/ -18 },    /* index 7: 5 bits:  1101x */    { /*3*/ -12, 10 },            /* index 8: 5 bits:  1110x */    { 11, 12 },                   /* index 9: 5 bits:  1111x */    { /*4*/ -11, /*5*/ -10 },     /* index 10: 6 bits: 11101x */    { /*-4*/ -19, /*-5*/ -20 },   /* index 11: 6 bits: 11110x */    { /*6*/ -9, 13 },             /* index 12: 6 bits: 11111x */    { /*-7*/ -22, /*-6*/ -21 }    /* index 13: 7 bits: 111111x */}; static const int8_t t_huffman_sa[][2] ={    { /*0*/ -15, 1 },             /* index 0: 1 bits: x */    { 2, 3 },                     /* index 1: 2 bits: 1x */    { /*-1*/ -16, /*1*/ -14 },    /* index 2: 3 bits: 10x */    { 4, 5 },                     /* index 3: 3 bits: 11x */    { /*-2*/ -17, /*2*/ -13 },    /* index 4: 4 bits: 110x */    { 6, 7 },                     /* index 5: 4 bits: 111x */    { /*-3*/ -18, /*3*/ -12 },    /* index 6: 5 bits: 1110x */    { 8, 9 },                     /* index 7: 5 bits: 1111x */    { /*-4*/ -19, /*4*/ -11 },    /* index 8: 6 bits: 11110x */    { 10, 11 },                   /* index 9: 6 bits: 11111x */    { /*-5*/ -20, /*5*/ -10 },    /* index 10: 7 bits: 111110x */    { /*-6*/ -21, 12 },           /* index 11: 7 bits: 111111x */    { /*-7*/ -22, 13 },           /* index 12: 8 bits: 1111111x */    { /*6*/ -9, /*7*/ -8 }        /* index 13: 9 bits: 11111111x */}; static const int8_t f_huffman_pan[][2] ={    { /*0*/ -15, 1 },             /* index 0: 1 bits: x */    { /*-1*/ -16, 2 },            /* index 1: 2 bits: 1x */    { /*1*/ -14, 3 },             /* index 2: 3 bits: 11x */    { 4, 5 },                     /* index 3: 4 bits: 111x */    { /*-2*/ -17, /*2*/ -13 },    /* index 4: 5 bits: 1110x */    { 6, 7 },                     /* index 5: 5 bits: 1111x */    { /*-3*/ -18, /*3*/ -12 },    /* index 6: 6 bits: 11110x */    { 8, 9 },                     /* index 7: 6 bits: 11111x */    { /*-4*/ -19, /*4*/ -11 },    /* index 8: 7 bits: 111110x */    { 10, 11 },                   /* index 9: 7 bits: 111111x */    { /*-5*/ -20, /*5*/ -10 },    /* index 10: 8 bits: 1111110x */    { 12, 13 },                   /* index 11: 8 bits: 1111111x */    { /*-6*/ -21, /*6*/ -9 },     /* index 12: 9 bits: 11111110x */    { /*-7*/ -22, 14 },           /* index 13: 9 bits: 11111111x */    { /*7*/ -8, 15 },             /* index 14: 10 bits: 111111111x */    { 16, 17 },                   /* index 15: 11 bits: 1111111111x */    { /*-8*/ -23, /*8*/ -7 },     /* index 16: 12 bits: 11111111110x */    { 18, 19 },                   /* index 17: 12 bits: 11111111111x */    { /*-10*/ -25, 20 },          /* index 18: 13 bits: 111111111110x */    { 21, 22 },                   /* index 19: 13 bits: 111111111111x */    { /*-9*/ -24, /*9*/ -6 },     /* index 20: 14 bits: 1111111111101x */    { /*10*/ -5, 23 },            /* index 21: 14 bits: 1111111111110x */    { 24, 25 },                   /* index 22: 14 bits: 1111111111111x */    { /*-13*/ -28, /*-11*/ -26 }, /* index 23: 15 bits: 11111111111101x */    { /*11*/ -4, /*13*/ -2 },     /* index 24: 15 bits: 11111111111110x */    { 26, 27 },                   /* index 25: 15 bits: 11111111111111x */    { /*-14*/ -29, /*-12*/ -27 }, /* index 26: 16 bits: 111111111111110x */    { /*12*/ -3, /*14*/ -1 }      /* index 27: 16 bits: 111111111111111x */}; static const int8_t t_huffman_pan[][2] ={    { /*0*/ -15, 1 },             /* index 0: 1 bits: x */    { /*-1*/ -16, 2 },            /* index 1: 2 bits: 1x */    { /*1*/ -14, 3 },             /* index 2: 3 bits: 11x */    { /*-2*/ -17, 4 },            /* index 3: 4 bits: 111x */    { /*2*/ -13, 5 },             /* index 4: 5 bits: 1111x */    { /*-3*/ -18, 6 },            /* index 5: 6 bits: 11111x */    { /*3*/ -12, 7 },             /* index 6: 7 bits: 111111x */    { /*-4*/ -19, 8 },            /* index 7: 8 bits: 1111111x */    { /*4*/ -11, 9 },             /* index 8: 9 bits: 11111111x */    { 10, 11 },                   /* index 9: 10 bits: 111111111x */    { /*-5*/ -20, /*5*/ -10 },    /* index 10: 11 bits: 1111111110x */    { 12, 13 },                   /* index 11: 11 bits: 1111111111x */    { /*-6*/ -21, /*6*/ -9 },     /* index 12: 12 bits: 11111111110x */    { 14, 15 },                   /* index 13: 12 bits: 11111111111x */    { /*-7*/ -22, /*7*/ -8 },     /* index 14: 13 bits: 111111111110x */    { 16, 17 },                   /* index 15: 13 bits: 111111111111x */    { /*-8*/ -23, /*8*/ -7 },     /* index 16: 14 bits: 1111111111110x */    { 18, 19 },                   /* index 17: 14 bits: 1111111111111x */    { /*-10*/ -25, /*10*/ -5 },   /* index 18: 15 bits: 11111111111110x */    { 20, 21 },                   /* index 19: 15 bits: 11111111111111x */    { /*-9*/ -24, /*9*/ -6 },     /* index 20: 16 bits: 111111111111110x */    { 22, 23 },                   /* index 21: 16 bits: 111111111111111x */    { 24, 25 },                   /* index 22: 17 bits: 1111111111111110x */    { 26, 27 },                   /* index 23: 17 bits: 1111111111111111x */    { /*-14*/ -29, /*-13*/ -28 }, /* index 24: 18 bits: 11111111111111100x */    { /*-12*/ -27, /*-11*/ -26 }, /* index 25: 18 bits: 11111111111111101x */    { /*11*/ -4, /*12*/ -3 },     /* index 26: 18 bits: 11111111111111110x */    { /*13*/ -2, /*14*/ -1 }      /* index 27: 18 bits: 11111111111111111x */}; /* There are 3 classes in the standard but the last 2 are identical */static const real_t sa_quant[8][2] ={    { FRAC_CONST(0.0000), FRAC_CONST(0.0000) },    { FRAC_CONST(0.0501), FRAC_CONST(0.1778) },    { FRAC_CONST(0.0706), FRAC_CONST(0.2818) },    { FRAC_CONST(0.0995), FRAC_CONST(0.4467) },    { FRAC_CONST(0.1399), FRAC_CONST(0.5623) },    { FRAC_CONST(0.1957), FRAC_CONST(0.7079) },    { FRAC_CONST(0.2713), FRAC_CONST(0.8913) },    { FRAC_CONST(0.3699), FRAC_CONST(1.0000) },}; /* We don't need the actual quantizer values */#if 0static const real_t pan_quant[8][5] ={    { COEF_CONST(0.0000), COEF_CONST(0.0000), COEF_CONST(0.0000), COEF_CONST(0.0000), COEF_CONST(0.0000) },    { COEF_CONST(0.1661), COEF_CONST(0.1661), COEF_CONST(0.3322), COEF_CONST(0.3322), COEF_CONST(0.3322) },    { COEF_CONST(0.3322), COEF_CONST(0.3322), COEF_CONST(0.6644), COEF_CONST(0.8305), COEF_CONST(0.8305) },    { COEF_CONST(0.4983), COEF_CONST(0.6644), COEF_CONST(0.9966), COEF_CONST(1.4949), COEF_CONST(1.6610) },    { COEF_CONST(0.6644), COEF_CONST(0.9966), COEF_CONST(1.4949), COEF_CONST(2.1593), COEF_CONST(2.4914) },    { COEF_CONST(0.8305), COEF_CONST(1.3288), COEF_CONST(2.1593), COEF_CONST(2.9897), COEF_CONST(3.4880) },    { COEF_CONST(0.9966), COEF_CONST(1.8271), COEF_CONST(2.8236), COEF_CONST(3.8202), COEF_CONST(4.6507) },    { COEF_CONST(1.3288), COEF_CONST(2.3253), COEF_CONST(3.4880), COEF_CONST(4.6507), COEF_CONST(5.8134) },};#endif /* 2^(pan_quant[x][y] */static const real_t pan_pow_2_pos[8][5] = {    { REAL_CONST(1.0000000), REAL_CONST(1.0000000), REAL_CONST(1.0000000), REAL_CONST(1.0000000), REAL_CONST(1.0000000)  },    { REAL_CONST(1.1220021), REAL_CONST(1.1220021), REAL_CONST(1.2589312), REAL_CONST(1.2589312), REAL_CONST(1.2589312)  },    { REAL_CONST(1.2589312), REAL_CONST(1.2589312), REAL_CONST(1.5849090), REAL_CONST(1.7783016), REAL_CONST(1.7783016)  },    { REAL_CONST(1.4125481), REAL_CONST(1.5849090), REAL_CONST(1.9952921), REAL_CONST(2.8184461), REAL_CONST(3.1623565)  },    { REAL_CONST(1.5849090), REAL_CONST(1.9952922), REAL_CONST(2.8184461), REAL_CONST(4.4669806), REAL_CONST(5.6232337)  },    { REAL_CONST(1.7783016), REAL_CONST(2.5119365), REAL_CONST(4.4669806), REAL_CONST(7.9430881), REAL_CONST(11.219994)  },    { REAL_CONST(1.9952921), REAL_CONST(3.5482312), REAL_CONST(7.0792671), REAL_CONST(14.125206), REAL_CONST(25.118876)  },    { REAL_CONST(2.5119365), REAL_CONST(5.0116998), REAL_CONST(11.219994), REAL_CONST(25.118876), REAL_CONST(56.235140)  }}; /* 2^(-pan_quant[x][y] */static const real_t pan_pow_2_neg[8][5] = {    { REAL_CONST(1),         REAL_CONST(1),         REAL_CONST(1),         REAL_CONST(1),         REAL_CONST(1)          },    { REAL_CONST(0.8912487), REAL_CONST(0.8912487), REAL_CONST(0.7943242), REAL_CONST(0.7943242), REAL_CONST(0.7943242)  },    { REAL_CONST(0.7943242), REAL_CONST(0.7943242), REAL_CONST(0.6309511), REAL_CONST(0.5623344), REAL_CONST(0.5623344)  },    { REAL_CONST(0.7079405), REAL_CONST(0.6309511), REAL_CONST(0.5011797), REAL_CONST(0.3548054), REAL_CONST(0.3162199)  },    { REAL_CONST(0.6309511), REAL_CONST(0.5011797), REAL_CONST(0.3548054), REAL_CONST(0.2238649), REAL_CONST(0.1778336)  },    { REAL_CONST(0.5623343), REAL_CONST(0.3980992), REAL_CONST(0.2238649), REAL_CONST(0.1258956), REAL_CONST(0.0891266)  },    { REAL_CONST(0.5011797), REAL_CONST(0.2818306), REAL_CONST(0.1412576), REAL_CONST(0.0707954), REAL_CONST(0.0398107)  },    { REAL_CONST(0.3980992), REAL_CONST(0.1995331), REAL_CONST(0.0891267), REAL_CONST(0.0398107), REAL_CONST(0.0177825)  }}; /* 2^(pan_quant[x][y]/30) */static const real_t pan_pow_2_30_pos[8][5] = {    { COEF_CONST(1),           COEF_CONST(1),           COEF_CONST(1),           COEF_CONST(1),           COEF_CONST(1)           },    { COEF_CONST(1.003845098), COEF_CONST(1.003845098), COEF_CONST(1.007704982), COEF_CONST(1.007704982), COEF_CONST(1.007704982) },    { COEF_CONST(1.007704982), COEF_CONST(1.007704982), COEF_CONST(1.01546933),  COEF_CONST(1.019373909), COEF_CONST(1.019373909) },    { COEF_CONST(1.011579706), COEF_CONST(1.01546933),  COEF_CONST(1.023293502), COEF_CONST(1.035142941), COEF_CONST(1.039123167) },    { COEF_CONST(1.01546933),  COEF_CONST(1.023293502), COEF_CONST(1.035142941), COEF_CONST(1.051155908), COEF_CONST(1.059252598) },    { COEF_CONST(1.019373909), COEF_CONST(1.03117796),  COEF_CONST(1.051155908), COEF_CONST(1.071518432), COEF_CONST(1.0839263)   },    { COEF_CONST(1.023293502), COEF_CONST(1.043118698), COEF_CONST(1.067414119), COEF_CONST(1.092277933), COEF_CONST(1.113439626) },    { COEF_CONST(1.03117796),  COEF_CONST(1.055195268), COEF_CONST(1.0839263),   COEF_CONST(1.113439626), COEF_CONST(1.143756546) }}; /* 2^(-pan_quant[x][y]/30) */static const real_t pan_pow_2_30_neg[8][5] = {    { COEF_CONST(1),           COEF_CONST(1),           COEF_CONST(1),           COEF_CONST(1),           COEF_CONST(1)           },    { COEF_CONST(0.99616963),  COEF_CONST(0.99616963),  COEF_CONST(0.992353931), COEF_CONST(0.992353931), COEF_CONST(0.99235393)  },    { COEF_CONST(0.992353931), COEF_CONST(0.992353931), COEF_CONST(0.984766325), COEF_CONST(0.980994305), COEF_CONST(0.980994305) },    { COEF_CONST(0.988552848), COEF_CONST(0.984766325), COEF_CONST(0.977236734), COEF_CONST(0.966050157), COEF_CONST(0.962349827) },    { COEF_CONST(0.984766325), COEF_CONST(0.977236734), COEF_CONST(0.966050157), COEF_CONST(0.951333663), COEF_CONST(0.944061881) },    { COEF_CONST(0.980994305), COEF_CONST(0.969764715), COEF_CONST(0.951333663), COEF_CONST(0.933255062), COEF_CONST(0.922571949) },    { COEF_CONST(0.977236734), COEF_CONST(0.958663671), COEF_CONST(0.936843519), COEF_CONST(0.915517901), COEF_CONST(0.898117847) },    { COEF_CONST(0.969764715), COEF_CONST(0.947691892), COEF_CONST(0.922571949), COEF_CONST(0.898117847), COEF_CONST(0.874311936) }}; static const real_t g_decayslope[MAX_SA_BAND] = {    FRAC_CONST(1),   FRAC_CONST(1),   FRAC_CONST(1),   FRAC_CONST(0.95),FRAC_CONST(0.9), FRAC_CONST(0.85), FRAC_CONST(0.8),    FRAC_CONST(0.75),FRAC_CONST(0.7), FRAC_CONST(0.65),FRAC_CONST(0.6), FRAC_CONST(0.55),FRAC_CONST(0.5),  FRAC_CONST(0.45),    FRAC_CONST(0.4), FRAC_CONST(0.35),FRAC_CONST(0.3), FRAC_CONST(0.25),FRAC_CONST(0.2), FRAC_CONST(0.15), FRAC_CONST(0.1),    FRAC_CONST(0.05),FRAC_CONST(0),   FRAC_CONST(0),   FRAC_CONST(0),   FRAC_CONST(0),   FRAC_CONST(0),    FRAC_CONST(0),    FRAC_CONST(0),   FRAC_CONST(0),   FRAC_CONST(0),   FRAC_CONST(0),   FRAC_CONST(0),   FRAC_CONST(0),    FRAC_CONST(0),    FRAC_CONST(0),   FRAC_CONST(0),   FRAC_CONST(0),   FRAC_CONST(0),   FRAC_CONST(0),   FRAC_CONST(0),    FRAC_CONST(0),    FRAC_CONST(0),   FRAC_CONST(0),   FRAC_CONST(0)}; static const real_t sa_sqrt_1_minus[8][2] = {    { FRAC_CONST(1),            FRAC_CONST(1)           },    { FRAC_CONST(0.998744206),  FRAC_CONST(0.984066644) },    { FRAC_CONST(0.997504707),  FRAC_CONST(0.959473168) },    { FRAC_CONST(0.995037562),  FRAC_CONST(0.894683804) },    { FRAC_CONST(0.990165638),  FRAC_CONST(0.826933317) },    { FRAC_CONST(0.980663811),  FRAC_CONST(0.706312672) },    { FRAC_CONST(0.962494836),  FRAC_CONST(0.45341406)  },    { FRAC_CONST(0.929071574),  FRAC_CONST(0)           }}; static const uint8_t sa_freq_scale[9] ={    0, 1, 2, 3, 5, 7, 10, 13, 23}; //static const uint8_t pan_freq_scale[21] =//{//    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,//    11, 12, 13, 14, 15, 18, 22, 26, 32, 64//}; static const uint8_t pan_quant_class[20] ={    0, 1, 1, 1, 1, 1, 1, 1, 1, 1,    2, 2, 2, 2, 3, 3, 3, 4, 4, 4}; /* Inverse mapping lookup */static const uint8_t pan_inv_freq[64] = {     0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,    15, 15, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18,    19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19,    19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19}; static const uint8_t sa_inv_freq[MAX_SA_BAND] = {    0, 1, 2, 3, 3, 4, 4, 5, 5, 5, 6, 6, 6,    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,    7, 7, 7, 7, 7, 7, 7}; static const real_t filter_coeff[] ={    FRAC_CONST(0.65143905754106),    FRAC_CONST(0.56471812200776),    FRAC_CONST(0.48954165955695)}; static const uint8_t delay_length[3] ={    3, 4, 5}; //static const real_t delay_fraction[] =//{//    FRAC_CONST(0.43), FRAC_CONST(0.75), FRAC_CONST(0.347)//}; static const real_t peak_decay = FRAC_CONST(0.76592833836465); static const real_t smooth_coeff = FRAC_CONST(0.25); /* Please note that these are the same tables as in plain PS */static const complex_t Q_Fract_allpass_Qmf[][3] = {    { { FRAC_CONST(0.7804303765), FRAC_CONST(0.6252426505) }, { FRAC_CONST(0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(0.8550928831), FRAC_CONST(0.5184748173) } },    { { FRAC_CONST(-0.4399392009), FRAC_CONST(0.8980275393) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(-0.0643581524), FRAC_CONST(0.9979268909) } },    { { FRAC_CONST(-0.9723699093), FRAC_CONST(-0.2334454209) }, { FRAC_CONST(0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(-0.9146071672), FRAC_CONST(0.4043435752) } },    { { FRAC_CONST(0.0157073960), FRAC_CONST(-0.9998766184) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(-0.7814115286), FRAC_CONST(-0.6240159869) } },    { { FRAC_CONST(0.9792228341), FRAC_CONST(-0.2027871907) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(0.1920081824), FRAC_CONST(-0.9813933372) } },    { { FRAC_CONST(0.4115142524), FRAC_CONST(0.9114032984) }, { FRAC_CONST(0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(0.9589683414), FRAC_CONST(-0.2835132182) } },    { { FRAC_CONST(-0.7996847630), FRAC_CONST(0.6004201174) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(0.6947838664), FRAC_CONST(0.7192186117) } },    { { FRAC_CONST(-0.7604058385), FRAC_CONST(-0.6494481564) }, { FRAC_CONST(0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(-0.3164770305), FRAC_CONST(0.9486001730) } },    { { FRAC_CONST(0.4679299891), FRAC_CONST(-0.8837655187) }, { FRAC_CONST(0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(-0.9874414206), FRAC_CONST(0.1579856575) } },    { { FRAC_CONST(0.9645573497), FRAC_CONST(0.2638732493) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(-0.5966450572), FRAC_CONST(-0.8025052547) } },    { { FRAC_CONST(-0.0471066870), FRAC_CONST(0.9988898635) }, { FRAC_CONST(0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(0.4357025325), FRAC_CONST(-0.9000906944) } },    { { FRAC_CONST(-0.9851093888), FRAC_CONST(0.1719288528) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(0.9995546937), FRAC_CONST(-0.0298405960) } },    { { FRAC_CONST(-0.3826831877), FRAC_CONST(-0.9238796234) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(0.4886211455), FRAC_CONST(0.8724960685) } },    { { FRAC_CONST(0.8181498647), FRAC_CONST(-0.5750049949) }, { FRAC_CONST(0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(-0.5477093458), FRAC_CONST(0.8366686702) } },    { { FRAC_CONST(0.7396308780), FRAC_CONST(0.6730127335) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(-0.9951074123), FRAC_CONST(-0.0987988561) } },    { { FRAC_CONST(-0.4954589605), FRAC_CONST(0.8686313629) }, { FRAC_CONST(0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(-0.3725017905), FRAC_CONST(-0.9280315042) } },    { { FRAC_CONST(-0.9557929039), FRAC_CONST(-0.2940406799) }, { FRAC_CONST(0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(0.6506417990), FRAC_CONST(-0.7593847513) } },    { { FRAC_CONST(0.0784594864), FRAC_CONST(-0.9969173074) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(0.9741733670), FRAC_CONST(0.2258014232) } },    { { FRAC_CONST(0.9900237322), FRAC_CONST(-0.1409008205) }, { FRAC_CONST(0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(0.2502108514), FRAC_CONST(0.9681913853) } },    { { FRAC_CONST(0.3534744382), FRAC_CONST(0.9354441762) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(-0.7427945137), FRAC_CONST(0.6695194840) } },    { { FRAC_CONST(-0.8358076215), FRAC_CONST(0.5490224361) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(-0.9370992780), FRAC_CONST(-0.3490629196) } },    { { FRAC_CONST(-0.7181259394), FRAC_CONST(-0.6959131360) }, { FRAC_CONST(0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(-0.1237744763), FRAC_CONST(-0.9923103452) } },    { { FRAC_CONST(0.5224990249), FRAC_CONST(-0.8526399136) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(0.8226406574), FRAC_CONST(-0.5685616732) } },    { { FRAC_CONST(0.9460852146), FRAC_CONST(0.3239179254) }, { FRAC_CONST(0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(0.8844994903), FRAC_CONST(0.4665412009) } },    { { FRAC_CONST(-0.1097348556), FRAC_CONST(0.9939609170) }, { FRAC_CONST(0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(-0.0047125919), FRAC_CONST(0.9999889135) } },    { { FRAC_CONST(-0.9939610362), FRAC_CONST(0.1097337380) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(-0.8888573647), FRAC_CONST(0.4581840038) } },    { { FRAC_CONST(-0.3239168525), FRAC_CONST(-0.9460855722) }, { FRAC_CONST(0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(-0.8172453642), FRAC_CONST(-0.5762898922) } },    { { FRAC_CONST(0.8526405096), FRAC_CONST(-0.5224980116) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(0.1331215799), FRAC_CONST(-0.9910997152) } },    { { FRAC_CONST(0.6959123611), FRAC_CONST(0.7181267142) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(0.9403476119), FRAC_CONST(-0.3402152061) } },    { { FRAC_CONST(-0.5490233898), FRAC_CONST(0.8358070254) }, { FRAC_CONST(0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(0.7364512086), FRAC_CONST(0.6764906645) } },    { { FRAC_CONST(-0.9354437590), FRAC_CONST(-0.3534754813) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(-0.2593250275), FRAC_CONST(0.9657900929) } },    { { FRAC_CONST(0.1409019381), FRAC_CONST(-0.9900235534) }, { FRAC_CONST(0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(-0.9762582779), FRAC_CONST(0.2166097313) } },    { { FRAC_CONST(0.9969173670), FRAC_CONST(-0.0784583688) }, { FRAC_CONST(0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(-0.6434556246), FRAC_CONST(-0.7654833794) } },    { { FRAC_CONST(0.2940396070), FRAC_CONST(0.9557932615) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(0.3812320232), FRAC_CONST(-0.9244794250) } },    { { FRAC_CONST(-0.8686318994), FRAC_CONST(0.4954580069) }, { FRAC_CONST(0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(0.9959943891), FRAC_CONST(-0.0894154981) } },    { { FRAC_CONST(-0.6730118990), FRAC_CONST(-0.7396316528) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(0.5397993922), FRAC_CONST(0.8417937160) } },    { { FRAC_CONST(0.5750059485), FRAC_CONST(-0.8181492686) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(-0.4968227744), FRAC_CONST(0.8678520322) } },    { { FRAC_CONST(0.9238792062), FRAC_CONST(0.3826842010) }, { FRAC_CONST(0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(-0.9992290139), FRAC_CONST(-0.0392601527) } },    { { FRAC_CONST(-0.1719299555), FRAC_CONST(0.9851091504) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(-0.4271997511), FRAC_CONST(-0.9041572809) } },    { { FRAC_CONST(-0.9988899231), FRAC_CONST(0.0471055657) }, { FRAC_CONST(0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(0.6041822433), FRAC_CONST(-0.7968461514) } },    { { FRAC_CONST(-0.2638721764), FRAC_CONST(-0.9645576477) }, { FRAC_CONST(0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(0.9859085083), FRAC_CONST(0.1672853529) } },    { { FRAC_CONST(0.8837660551), FRAC_CONST(-0.4679289758) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(0.3075223565), FRAC_CONST(0.9515408874) } },    { { FRAC_CONST(0.6494473219), FRAC_CONST(0.7604066133) }, { FRAC_CONST(0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(-0.7015317082), FRAC_CONST(0.7126382589) } },    { { FRAC_CONST(-0.6004210114), FRAC_CONST(0.7996840477) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(-0.9562535882), FRAC_CONST(-0.2925389707) } },    { { FRAC_CONST(-0.9114028811), FRAC_CONST(-0.4115152657) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(-0.1827499419), FRAC_CONST(-0.9831594229) } },    { { FRAC_CONST(0.2027882934), FRAC_CONST(-0.9792225957) }, { FRAC_CONST(0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(0.7872582674), FRAC_CONST(-0.6166234016) } },    { { FRAC_CONST(0.9998766780), FRAC_CONST(-0.0157062728) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(0.9107555747), FRAC_CONST(0.4129458666) } },    { { FRAC_CONST(0.2334443331), FRAC_CONST(0.9723701477) }, { FRAC_CONST(0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(0.0549497530), FRAC_CONST(0.9984891415) } },    { { FRAC_CONST(-0.8980280757), FRAC_CONST(0.4399381876) }, { FRAC_CONST(0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(-0.8599416018), FRAC_CONST(0.5103924870) } },    { { FRAC_CONST(-0.6252418160), FRAC_CONST(-0.7804310918) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(-0.8501682281), FRAC_CONST(-0.5265110731) } },    { { FRAC_CONST(0.6252435446), FRAC_CONST(-0.7804297209) }, { FRAC_CONST(0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(0.0737608299), FRAC_CONST(-0.9972759485) } },    { { FRAC_CONST(0.8980270624), FRAC_CONST(0.4399402142) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(0.9183775187), FRAC_CONST(-0.3957053721) } },    { { FRAC_CONST(-0.2334465086), FRAC_CONST(0.9723696709) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(0.7754954696), FRAC_CONST(0.6313531399) } },    { { FRAC_CONST(-0.9998766184), FRAC_CONST(-0.0157085191) }, { FRAC_CONST(0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(-0.2012493610), FRAC_CONST(0.9795400500) } },    { { FRAC_CONST(-0.2027861029), FRAC_CONST(-0.9792230725) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(-0.9615978599), FRAC_CONST(0.2744622827) } },    { { FRAC_CONST(0.9114037752), FRAC_CONST(-0.4115132093) }, { FRAC_CONST(0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(-0.6879743338), FRAC_CONST(-0.7257350087) } },    { { FRAC_CONST(0.6004192233), FRAC_CONST(0.7996854186) }, { FRAC_CONST(0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(0.3254036009), FRAC_CONST(-0.9455752373) } },    { { FRAC_CONST(-0.6494490504), FRAC_CONST(0.7604051232) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(0.9888865948), FRAC_CONST(-0.1486719251) } },    { { FRAC_CONST(-0.8837650418), FRAC_CONST(-0.4679309726) }, { FRAC_CONST(0.9238795042), FRAC_CONST(-0.3826834261) }, { FRAC_CONST(0.5890548825), FRAC_CONST(0.8080930114) } },    { { FRAC_CONST(0.2638743520), FRAC_CONST(-0.9645570517) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(0.9238795042) }, { FRAC_CONST(-0.4441666007), FRAC_CONST(0.8959442377) } },    { { FRAC_CONST(0.9988898039), FRAC_CONST(0.0471078083) }, { FRAC_CONST(-0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(-0.9997915030), FRAC_CONST(0.0204183888) } },    { { FRAC_CONST(0.1719277352), FRAC_CONST(0.9851095676) }, { FRAC_CONST(0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(-0.4803760946), FRAC_CONST(-0.8770626187) } },    { { FRAC_CONST(-0.9238800406), FRAC_CONST(0.3826821446) }, { FRAC_CONST(-0.9238795042), FRAC_CONST(0.3826834261) }, { FRAC_CONST(0.5555707216), FRAC_CONST(-0.8314692974) } },    { { FRAC_CONST(-0.5750041008), FRAC_CONST(-0.8181505203) }, { FRAC_CONST(0.3826834261), FRAC_CONST(-0.9238795042) }, { FRAC_CONST(0.9941320419), FRAC_CONST(0.1081734300) } }}; static const complex_t Phi_Fract_Qmf[] = {    { FRAC_CONST(0.8181497455), FRAC_CONST(0.5750052333) },    { FRAC_CONST(-0.2638730407), FRAC_CONST(0.9645574093) },    { FRAC_CONST(-0.9969173074), FRAC_CONST(0.0784590989) },    { FRAC_CONST(-0.4115143716), FRAC_CONST(-0.9114032984) },    { FRAC_CONST(0.7181262970), FRAC_CONST(-0.6959127784) },    { FRAC_CONST(0.8980275989), FRAC_CONST(0.4399391711) },    { FRAC_CONST(-0.1097343117), FRAC_CONST(0.9939609766) },    { FRAC_CONST(-0.9723699093), FRAC_CONST(0.2334453613) },    { FRAC_CONST(-0.5490227938), FRAC_CONST(-0.8358073831) },    { FRAC_CONST(0.6004202366), FRAC_CONST(-0.7996846437) },    { FRAC_CONST(0.9557930231), FRAC_CONST(0.2940403223) },    { FRAC_CONST(0.0471064523), FRAC_CONST(0.9988898635) },    { FRAC_CONST(-0.9238795042), FRAC_CONST(0.3826834261) },    { FRAC_CONST(-0.6730124950), FRAC_CONST(-0.7396311164) },    { FRAC_CONST(0.4679298103), FRAC_CONST(-0.8837656379) },    { FRAC_CONST(0.9900236726), FRAC_CONST(0.1409012377) },    { FRAC_CONST(0.2027872950), FRAC_CONST(0.9792228341) },    { FRAC_CONST(-0.8526401520), FRAC_CONST(0.5224985480) },    { FRAC_CONST(-0.7804304361), FRAC_CONST(-0.6252426505) },    { FRAC_CONST(0.3239174187), FRAC_CONST(-0.9460853338) },    { FRAC_CONST(0.9998766184), FRAC_CONST(-0.0157073177) },    { FRAC_CONST(0.3534748554), FRAC_CONST(0.9354440570) },    { FRAC_CONST(-0.7604059577), FRAC_CONST(0.6494480371) },    { FRAC_CONST(-0.8686315417), FRAC_CONST(-0.4954586625) },    { FRAC_CONST(0.1719291061), FRAC_CONST(-0.9851093292) },    { FRAC_CONST(0.9851093292), FRAC_CONST(-0.1719291061) },    { FRAC_CONST(0.4954586625), FRAC_CONST(0.8686315417) },    { FRAC_CONST(-0.6494480371), FRAC_CONST(0.7604059577) },    { FRAC_CONST(-0.9354440570), FRAC_CONST(-0.3534748554) },    { FRAC_CONST(0.0157073177), FRAC_CONST(-0.9998766184) },    { FRAC_CONST(0.9460853338), FRAC_CONST(-0.3239174187) },    { FRAC_CONST(0.6252426505), FRAC_CONST(0.7804304361) },    { FRAC_CONST(-0.5224985480), FRAC_CONST(0.8526401520) },    { FRAC_CONST(-0.9792228341), FRAC_CONST(-0.2027872950) },    { FRAC_CONST(-0.1409012377), FRAC_CONST(-0.9900236726) },    { FRAC_CONST(0.8837656379), FRAC_CONST(-0.4679298103) },    { FRAC_CONST(0.7396311164), FRAC_CONST(0.6730124950) },    { FRAC_CONST(-0.3826834261), FRAC_CONST(0.9238795042) },    { FRAC_CONST(-0.9988898635), FRAC_CONST(-0.0471064523) },    { FRAC_CONST(-0.2940403223), FRAC_CONST(-0.9557930231) },    { FRAC_CONST(0.7996846437), FRAC_CONST(-0.6004202366) },    { FRAC_CONST(0.8358073831), FRAC_CONST(0.5490227938) },    { FRAC_CONST(-0.2334453613), FRAC_CONST(0.9723699093) },    { FRAC_CONST(-0.9939609766), FRAC_CONST(0.1097343117) },    { FRAC_CONST(-0.4399391711), FRAC_CONST(-0.8980275989) },    { FRAC_CONST(0.6959127784), FRAC_CONST(-0.7181262970) },    { FRAC_CONST(0.9114032984), FRAC_CONST(0.4115143716) },    { FRAC_CONST(-0.0784590989), FRAC_CONST(0.9969173074) },    { FRAC_CONST(-0.9645574093), FRAC_CONST(0.2638730407) },    { FRAC_CONST(-0.5750052333), FRAC_CONST(-0.8181497455) },    { FRAC_CONST(0.5750052333), FRAC_CONST(-0.8181497455) },    { FRAC_CONST(0.9645574093), FRAC_CONST(0.2638730407) },    { FRAC_CONST(0.0784590989), FRAC_CONST(0.9969173074) },    { FRAC_CONST(-0.9114032984), FRAC_CONST(0.4115143716) },    { FRAC_CONST(-0.6959127784), FRAC_CONST(-0.7181262970) },    { FRAC_CONST(0.4399391711), FRAC_CONST(-0.8980275989) },    { FRAC_CONST(0.9939609766), FRAC_CONST(0.1097343117) },    { FRAC_CONST(0.2334453613), FRAC_CONST(0.9723699093) },    { FRAC_CONST(-0.8358073831), FRAC_CONST(0.5490227938) },    { FRAC_CONST(-0.7996846437), FRAC_CONST(-0.6004202366) },    { FRAC_CONST(0.2940403223), FRAC_CONST(-0.9557930231) },    { FRAC_CONST(0.9988898635), FRAC_CONST(-0.0471064523) },    { FRAC_CONST(0.3826834261), FRAC_CONST(0.9238795042) },    { FRAC_CONST(-0.7396311164), FRAC_CONST(0.6730124950) }};  /* static function declarations */static void drm_ps_sa_element(drm_ps_info *ps, bitfile *ld);static void drm_ps_pan_element(drm_ps_info *ps, bitfile *ld);static int8_t huff_dec(bitfile *ld, drm_ps_huff_tab huff);  uint16_t drm_ps_data(drm_ps_info *ps, bitfile *ld){    uint16_t bits = (uint16_t)faad_get_processed_bits(ld);     ps->drm_ps_data_available = 1;     ps->bs_enable_sa = faad_get1bit(ld);    ps->bs_enable_pan = faad_get1bit(ld);     if (ps->bs_enable_sa)    {        drm_ps_sa_element(ps, ld);    }     if (ps->bs_enable_pan)    {        drm_ps_pan_element(ps, ld);    }     bits = (uint16_t)faad_get_processed_bits(ld) - bits;     return bits;} static void drm_ps_sa_element(drm_ps_info *ps, bitfile *ld){    drm_ps_huff_tab huff;    uint8_t band;     ps->bs_sa_dt_flag = faad_get1bit(ld);    if (ps->bs_sa_dt_flag)    {        huff = t_huffman_sa;    } else {        huff = f_huffman_sa;    }     for (band = 0; band < DRM_NUM_SA_BANDS; band++)    {        ps->bs_sa_data[band] = huff_dec(ld, huff);    }} static void drm_ps_pan_element(drm_ps_info *ps, bitfile *ld){    drm_ps_huff_tab huff;    uint8_t band;     ps->bs_pan_dt_flag = faad_get1bit(ld);    if (ps->bs_pan_dt_flag)    {        huff = t_huffman_pan;    } else {        huff = f_huffman_pan;    }     for (band = 0; band < DRM_NUM_PAN_BANDS; band++)    {        ps->bs_pan_data[band] = huff_dec(ld, huff);    }}

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