godot/drivers/opus/silk/tables_other.c

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#ifdef OPUS_HAVE_CONFIG_H
#include "opus_config.h"
#endif

#include "structs.h"
#include "define.h"
#include "tables.h"

#ifdef __cplusplus
extern "C"
{
#endif

/* Piece-wise linear mapping from bitrate in kbps to coding quality in dB SNR */
const opus_int32 silk_TargetRate_table_NB[ TARGET_RATE_TAB_SZ ] = {
    0,      8000,   9400,   11500,  13500,  17500,  25000,  MAX_TARGET_RATE_BPS
};
const opus_int32 silk_TargetRate_table_MB[ TARGET_RATE_TAB_SZ ] = {
    0,      9000,   12000,  14500,  18500,  24500,  35500,  MAX_TARGET_RATE_BPS
};
const opus_int32 silk_TargetRate_table_WB[ TARGET_RATE_TAB_SZ ] = {
    0,      10500,  14000,  17000,  21500,  28500,  42000,  MAX_TARGET_RATE_BPS
};
const opus_int16 silk_SNR_table_Q1[ TARGET_RATE_TAB_SZ ] = {
    18,     29,     38,     40,     46,     52,     62,     84
};

/* Tables for stereo predictor coding */
const opus_int16 silk_stereo_pred_quant_Q13[ STEREO_QUANT_TAB_SIZE ] = {
    -13732, -10050, -8266, -7526, -6500, -5000, -2950,  -820,
       820,   2950,  5000,  6500,  7526,  8266, 10050, 13732
};
const opus_uint8  silk_stereo_pred_joint_iCDF[ 25 ] = {
    249, 247, 246, 245, 244,
    234, 210, 202, 201, 200,
    197, 174,  82,  59,  56,
     55,  54,  46,  22,  12,
     11,  10,   9,   7,   0
};
const opus_uint8  silk_stereo_only_code_mid_iCDF[ 2 ] = { 64, 0 };

/* Tables for LBRR flags */
static const opus_uint8 silk_LBRR_flags_2_iCDF[ 3 ] = { 203, 150, 0 };
static const opus_uint8 silk_LBRR_flags_3_iCDF[ 7 ] = { 215, 195, 166, 125, 110, 82, 0 };
const opus_uint8 * const silk_LBRR_flags_iCDF_ptr[ 2 ] = {
    silk_LBRR_flags_2_iCDF,
    silk_LBRR_flags_3_iCDF
};

/* Table for LSB coding */
const opus_uint8 silk_lsb_iCDF[ 2 ] = { 120, 0 };

/* Tables for LTPScale */
const opus_uint8 silk_LTPscale_iCDF[ 3 ] = { 128, 64, 0 };

/* Tables for signal type and offset coding */
const opus_uint8 silk_type_offset_VAD_iCDF[ 4 ] = {
       232,    158,    10,      0
};
const opus_uint8 silk_type_offset_no_VAD_iCDF[ 2 ] = {
       230,      0
};

/* Tables for NLSF interpolation factor */
const opus_uint8 silk_NLSF_interpolation_factor_iCDF[ 5 ] = { 243, 221, 192, 181, 0 };

/* Quantization offsets */
const opus_int16  silk_Quantization_Offsets_Q10[ 2 ][ 2 ] = {
    { OFFSET_UVL_Q10, OFFSET_UVH_Q10 }, { OFFSET_VL_Q10, OFFSET_VH_Q10 }
};

/* Table for LTPScale */
const opus_int16 silk_LTPScales_table_Q14[ 3 ] = { 15565, 12288, 8192 };

/* Uniform entropy tables */
const opus_uint8 silk_uniform3_iCDF[ 3 ] = { 171, 85, 0 };
const opus_uint8 silk_uniform4_iCDF[ 4 ] = { 192, 128, 64, 0 };
const opus_uint8 silk_uniform5_iCDF[ 5 ] = { 205, 154, 102, 51, 0 };
const opus_uint8 silk_uniform6_iCDF[ 6 ] = { 213, 171, 128, 85, 43, 0 };
const opus_uint8 silk_uniform8_iCDF[ 8 ] = { 224, 192, 160, 128, 96, 64, 32, 0 };

const opus_uint8 silk_NLSF_EXT_iCDF[ 7 ] = { 100, 40, 16, 7, 3, 1, 0 };

/*  Elliptic/Cauer filters designed with 0.1 dB passband ripple,
        80 dB minimum stopband attenuation, and
        [0.95 : 0.15 : 0.35] normalized cut off frequencies. */

/* Interpolation points for filter coefficients used in the bandwidth transition smoother */
const opus_int32 silk_Transition_LP_B_Q28[ TRANSITION_INT_NUM ][ TRANSITION_NB ] =
{
{    250767114,  501534038,  250767114  },
{    209867381,  419732057,  209867381  },
{    170987846,  341967853,  170987846  },
{    131531482,  263046905,  131531482  },
{     89306658,  178584282,   89306658  }
};

/* Interpolation points for filter coefficients used in the bandwidth transition smoother */
const opus_int32 silk_Transition_LP_A_Q28[ TRANSITION_INT_NUM ][ TRANSITION_NA ] =
{
{    506393414,  239854379  },
{    411067935,  169683996  },
{    306733530,  116694253  },
{    185807084,   77959395  },
{     35497197,   57401098  }
};

#ifdef __cplusplus
}
#endif