ref: 4800d66598126c980571c74df08fe6f8a73e2fe2
dir: /silk/tables_other.c/
/***********************************************************************
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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modification, are permitted provided that the following conditions
are met:
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- Redistributions in binary form must reproduce the above copyright
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- Neither the name of Internet Society, IETF or IETF Trust, nor the
names of specific contributors, may be used to endorse or promote
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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***********************************************************************/
#ifdef HAVE_CONFIG_H
#include "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