shithub: opus

ref: 2ca6c5d2c6e68ca4c0302a352d717857fc1bc65d
dir: /silk/silk_resampler_rom.c/

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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

/* Filter coefficients for IIR/FIR polyphase resampling                    *
 * Total size: < 600 Words (1.2 kB)                                     */

#include "silk_resampler_private.h"

/* Tables for 2x downsampler */
const opus_int16 silk_resampler_down2_0 = 9872;
const opus_int16 silk_resampler_down2_1 = 39809 - 65536;

/* Tables for 2x upsampler, low quality */
const opus_int16 silk_resampler_up2_lq_0 = 8102;
const opus_int16 silk_resampler_up2_lq_1 = 36783 - 65536;

/* Tables for 2x upsampler, high quality */
const opus_int16 silk_resampler_up2_hq_0[ 2 ] = {  4280, 33727 - 65536 };
const opus_int16 silk_resampler_up2_hq_1[ 2 ] = { 16295, 54015 - 65536 };
const opus_int16 silk_resampler_up2_hq_notch[ 4 ] = { 6554,  -3932,   6554,  30573 };

/* Tables with IIR and FIR coefficients for fractional downsamplers (90 Words) */
SKP_DWORD_ALIGN const opus_int16 silk_Resampler_3_4_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
    -20253, -13986,
        86,      7,   -151,    368,   -542,    232,  11041,  21904,
        39,     90,   -181,    216,    -17,   -877,   6408,  19695,
         2,    113,   -108,      2,    314,   -977,   2665,  15787,
};

SKP_DWORD_ALIGN const opus_int16 silk_Resampler_2_3_COEFS[ 2 + 2 * RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
    -13997, -14120,
        60,   -174,     71,    298,   -800,    659,   9238,  17461,
        48,    -40,   -150,    314,   -155,   -845,   4188,  14293,
};

SKP_DWORD_ALIGN const opus_int16 silk_Resampler_1_2_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
      1233, -14293,
       -91,    162,    169,   -342,   -505,   1332,   5281,   8742,
};

SKP_DWORD_ALIGN const opus_int16 silk_Resampler_3_8_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
     12634, -14550,
       246,   -175,   -326,   -113,    764,   2209,   3664,   4402,
       171,      3,   -301,   -258,    391,   1693,   3227,   4272,
        88,    138,   -236,   -327,     95,   1203,   2733,   4022,
};

SKP_DWORD_ALIGN const opus_int16 silk_Resampler_1_3_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
     16306, -14409,
        99,   -201,   -220,    -16,    572,   1483,   2433,   3043,
};

SKP_DWORD_ALIGN const opus_int16 silk_Resampler_2_3_COEFS_LQ[ 2 + 2 * 2 ] = {
     -2797,  -6507,
      4697,  10739,
      1567,   8276,
};

SKP_DWORD_ALIGN const opus_int16 silk_Resampler_1_3_COEFS_LQ[ 2 + 3 ] = {
     16777,  -9792,
       890,   1614,   2148,
};


/* Tables with coefficients for 4th order ARMA filter (35 Words), in a packed format:       */
/*    { B1_Q14[1], B2_Q14[1], -A1_Q14[1], -A1_Q14[2], -A2_Q14[1], -A2_Q14[2], gain_Q16 }    */
/* where it is assumed that B*_Q14[0], B*_Q14[2], A*_Q14[0] are all 16384                   */
SKP_DWORD_ALIGN const opus_int16 silk_Resampler_320_441_ARMA4_COEFS[ 7 ] = {
     31454,  24746,  -9706,  -3386, -17911, -13243,  24797
};

SKP_DWORD_ALIGN const opus_int16 silk_Resampler_240_441_ARMA4_COEFS[ 7 ] = {
     28721,  11254,   3189,  -2546,  -1495, -12618,  11562
};

SKP_DWORD_ALIGN const opus_int16 silk_Resampler_160_441_ARMA4_COEFS[ 7 ] = {
     23492,  -6457,  14358,  -4856,  14654, -13008,   4456
};

SKP_DWORD_ALIGN const opus_int16 silk_Resampler_120_441_ARMA4_COEFS[ 7 ] = {
     19311, -15569,  19489,  -6950,  21441, -13559,   2370
};

SKP_DWORD_ALIGN const opus_int16 silk_Resampler_80_441_ARMA4_COEFS[ 7 ] = {
     13248, -23849,  24126,  -9486,  26806, -14286,   1065
};

/* Table with interplation fractions of 1/288 : 2/288 : 287/288 (432 Words) */
SKP_DWORD_ALIGN const opus_int16 silk_resampler_frac_FIR_144[ 144 ][ RESAMPLER_ORDER_FIR_144 / 2 ] = {
    {  -25,    58, 32526},
    {   -8,   -69, 32461},
    {    8,  -195, 32393},
    {   25,  -318, 32321},
    {   41,  -439, 32244},
    {   57,  -557, 32163},
    {   72,  -673, 32079},
    {   88,  -787, 31990},
    {  103,  -899, 31897},
    {  118, -1009, 31801},
    {  133, -1116, 31700},
    {  148, -1221, 31596},
    {  162, -1324, 31488},
    {  177, -1424, 31376},
    {  191, -1522, 31260},
    {  205, -1618, 31140},
    {  218, -1712, 31017},
    {  231, -1803, 30890},
    {  245, -1893, 30759},
    {  257, -1980, 30625},
    {  270, -2065, 30487},
    {  282, -2147, 30346},
    {  295, -2228, 30201},
    {  306, -2306, 30052},
    {  318, -2382, 29900},
    {  330, -2456, 29745},
    {  341, -2528, 29586},
    {  352, -2597, 29424},
    {  362, -2664, 29259},
    {  373, -2730, 29090},
    {  383, -2793, 28918},
    {  393, -2854, 28743},
    {  402, -2912, 28565},
    {  411, -2969, 28384},
    {  421, -3024, 28199},
    {  429, -3076, 28012},
    {  438, -3126, 27822},
    {  446, -3175, 27628},
    {  454, -3221, 27432},
    {  462, -3265, 27233},
    {  469, -3307, 27031},
    {  476, -3348, 26826},
    {  483, -3386, 26619},
    {  490, -3422, 26409},
    {  496, -3456, 26196},
    {  502, -3488, 25981},
    {  508, -3518, 25763},
    {  514, -3547, 25543},
    {  519, -3573, 25320},
    {  524, -3597, 25095},
    {  529, -3620, 24867},
    {  533, -3640, 24637},
    {  538, -3659, 24405},
    {  541, -3676, 24171},
    {  545, -3691, 23934},
    {  548, -3704, 23696},
    {  552, -3716, 23455},
    {  554, -3726, 23212},
    {  557, -3733, 22967},
    {  559, -3740, 22721},
    {  561, -3744, 22472},
    {  563, -3747, 22222},
    {  565, -3748, 21970},
    {  566, -3747, 21716},
    {  567, -3745, 21460},
    {  568, -3741, 21203},
    {  568, -3735, 20944},
    {  568, -3728, 20684},
    {  568, -3719, 20422},
    {  568, -3708, 20159},
    {  568, -3697, 19894},
    {  567, -3683, 19628},
    {  566, -3668, 19361},
    {  564, -3652, 19093},
    {  563, -3634, 18823},
    {  561, -3614, 18552},
    {  559, -3594, 18280},
    {  557, -3571, 18008},
    {  554, -3548, 17734},
    {  552, -3523, 17459},
    {  549, -3497, 17183},
    {  546, -3469, 16907},
    {  542, -3440, 16630},
    {  539, -3410, 16352},
    {  535, -3379, 16074},
    {  531, -3346, 15794},
    {  527, -3312, 15515},
    {  522, -3277, 15235},
    {  517, -3241, 14954},
    {  513, -3203, 14673},
    {  507, -3165, 14392},
    {  502, -3125, 14110},
    {  497, -3085, 13828},
    {  491, -3043, 13546},
    {  485, -3000, 13264},
    {  479, -2957, 12982},
    {  473, -2912, 12699},
    {  466, -2867, 12417},
    {  460, -2820, 12135},
    {  453, -2772, 11853},
    {  446, -2724, 11571},
    {  439, -2675, 11289},
    {  432, -2625, 11008},
    {  424, -2574, 10727},
    {  417, -2522, 10446},
    {  409, -2470, 10166},
    {  401, -2417,  9886},
    {  393, -2363,  9607},
    {  385, -2309,  9328},
    {  376, -2253,  9050},
    {  368, -2198,  8773},
    {  359, -2141,  8497},
    {  351, -2084,  8221},
    {  342, -2026,  7946},
    {  333, -1968,  7672},
    {  324, -1910,  7399},
    {  315, -1850,  7127},
    {  305, -1791,  6856},
    {  296, -1731,  6586},
    {  286, -1670,  6317},
    {  277, -1609,  6049},
    {  267, -1548,  5783},
    {  257, -1486,  5517},
    {  247, -1424,  5254},
    {  237, -1362,  4991},
    {  227, -1300,  4730},
    {  217, -1237,  4470},
    {  207, -1174,  4212},
    {  197, -1110,  3956},
    {  187, -1047,  3701},
    {  176,  -984,  3448},
    {  166,  -920,  3196},
    {  155,  -856,  2946},
    {  145,  -792,  2698},
    {  134,  -728,  2452},
    {  124,  -664,  2207},
    {  113,  -600,  1965},
    {  102,  -536,  1724},
    {   92,  -472,  1486},
    {   81,  -408,  1249},
    {   70,  -345,  1015},
    {   60,  -281,   783},
    {   49,  -217,   553},
    {   38,  -154,   325},
};