constants.c

Ilibc 语音编解码库算法。语音质量高。接口简单。

   
   /******************************************************************
   
       iLBC Speech Coder ANSI-C Source Code
   
       constants.c
   
       Copyright (C) The Internet Society (2004). 
       All Rights Reserved.
   
   ******************************************************************/
   
   #include "iLBC_define.h"
   
   /* ULP bit allocation */
   
       /* 20 ms frame */
   
   const iLBC_ULP_Inst_t ULP_20msTbl = {
       /* LSF */
       {   {6,0,0,0,0}, {7,0,0,0,0}, {7,0,0,0,0}, 
           {0,0,0,0,0}, {0,0,0,0,0}, {0,0,0,0,0}},
       /* Start state location, gain and samples */
       {2,0,0,0,0},
       {1,0,0,0,0},
       {6,0,0,0,0},
       {0,1,2,0,0},
       /* extra CB index and extra CB gain */
       {{6,0,1,0,0}, {0,0,7,0,0}, {0,0,7,0,0}},
       {{2,0,3,0,0}, {1,1,2,0,0}, {0,0,3,0,0}},
       /* CB index and CB gain */
       {   {{7,0,1,0,0}, {0,0,7,0,0}, {0,0,7,0,0}},
           {{0,0,8,0,0}, {0,0,8,0,0}, {0,0,8,0,0}},
           {{0,0,0,0,0}, {0,0,0,0,0}, {0,0,0,0,0}},
           {{0,0,0,0,0}, {0,0,0,0,0}, {0,0,0,0,0}}},
       {   {{1,2,2,0,0}, {1,1,2,0,0}, {0,0,3,0,0}},
           {{1,1,3,0,0}, {0,2,2,0,0}, {0,0,3,0,0}},
           {{0,0,0,0,0}, {0,0,0,0,0}, {0,0,0,0,0}},
           {{0,0,0,0,0}, {0,0,0,0,0}, {0,0,0,0,0}}}
   };
   
       /* 30 ms frame */
   
   const iLBC_ULP_Inst_t ULP_30msTbl = {
       /* LSF */
       {   {6,0,0,0,0}, {7,0,0,0,0}, {7,0,0,0,0}, 
   
   
           {6,0,0,0,0}, {7,0,0,0,0}, {7,0,0,0,0}},
       /* Start state location, gain and samples */
       {3,0,0,0,0},
       {1,0,0,0,0},
       {6,0,0,0,0},
       {0,1,2,0,0},
       /* extra CB index and extra CB gain */
       {{4,2,1,0,0}, {0,0,7,0,0}, {0,0,7,0,0}},
       {{1,1,3,0,0}, {1,1,2,0,0}, {0,0,3,0,0}},
       /* CB index and CB gain */
       {   {{6,1,1,0,0}, {0,0,7,0,0}, {0,0,7,0,0}},
           {{0,7,1,0,0}, {0,0,8,0,0}, {0,0,8,0,0}},
           {{0,7,1,0,0}, {0,0,8,0,0}, {0,0,8,0,0}},
           {{0,7,1,0,0}, {0,0,8,0,0}, {0,0,8,0,0}}},
       {   {{1,2,2,0,0}, {1,2,1,0,0}, {0,0,3,0,0}},
           {{0,2,3,0,0}, {0,2,2,0,0}, {0,0,3,0,0}},
           {{0,1,4,0,0}, {0,1,3,0,0}, {0,0,3,0,0}},
           {{0,1,4,0,0}, {0,1,3,0,0}, {0,0,3,0,0}}}
   };
   
   /* HP Filters */
   
   float hpi_zero_coefsTbl[3] = {
       (float)0.92727436, (float)-1.8544941, (float)0.92727436
   };
   float hpi_pole_coefsTbl[3] = {
       (float)1.0, (float)-1.9059465, (float)0.9114024
   };
   float hpo_zero_coefsTbl[3] = {
       (float)0.93980581, (float)-1.8795834, (float)0.93980581
   };
   float hpo_pole_coefsTbl[3] = {
       (float)1.0, (float)-1.9330735, (float)0.93589199
   };
   
   /* LP Filter */
   
   float lpFilt_coefsTbl[FILTERORDER_DS]={
       (float)-0.066650, (float)0.125000, (float)0.316650, 
       (float)0.414063, (float)0.316650, 
       (float)0.125000, (float)-0.066650
   };
   
   /* State quantization tables */
   
   float state_sq3Tbl[8] = {
       (float)-3.719849, (float)-2.177490, (float)-1.130005, 
       (float)-0.309692, (float)0.444214, (float)1.329712, 
       (float)2.436279, (float)3.983887
   };
   
   float state_frgqTbl[64] = {
       (float)1.000085, (float)1.071695, (float)1.140395, 
       (float)1.206868, (float)1.277188, (float)1.351503, 
   
   
       (float)1.429380, (float)1.500727, (float)1.569049, 
       (float)1.639599, (float)1.707071, (float)1.781531, 
       (float)1.840799, (float)1.901550, (float)1.956695, 
       (float)2.006750, (float)2.055474, (float)2.102787, 
       (float)2.142819, (float)2.183592, (float)2.217962, 
       (float)2.257177, (float)2.295739, (float)2.332967, 
       (float)2.369248, (float)2.402792, (float)2.435080, 
       (float)2.468598, (float)2.503394, (float)2.539284, 
       (float)2.572944, (float)2.605036, (float)2.636331, 
       (float)2.668939, (float)2.698780, (float)2.729101, 
       (float)2.759786, (float)2.789834, (float)2.818679, 
       (float)2.848074, (float)2.877470, (float)2.906899, 
       (float)2.936655, (float)2.967804, (float)3.000115, 
       (float)3.033367, (float)3.066355, (float)3.104231, 
       (float)3.141499, (float)3.183012, (float)3.222952, 
       (float)3.265433, (float)3.308441, (float)3.350823, 
       (float)3.395275, (float)3.442793, (float)3.490801, 
       (float)3.542514, (float)3.604064, (float)3.666050, 
       (float)3.740994, (float)3.830749, (float)3.938770, 
       (float)4.101764
   };
   
   /* CB tables */
   
   int search_rangeTbl[5][CB_NSTAGES]={{58,58,58}, {108,44,44}, 
               {108,108,108}, {108,108,108}, {108,108,108}};
   int stMemLTbl=85;
   int memLfTbl[NASUB_MAX]={147,147,147,147};
   
   /* expansion filter(s) */
   
   float cbfiltersTbl[CB_FILTERLEN]={
       (float)-0.034180, (float)0.108887, (float)-0.184326,
       (float)0.806152,  (float)0.713379, (float)-0.144043,
       (float)0.083740,  (float)-0.033691
   };
   
   /* Gain Quantization */
   
   float gain_sq3Tbl[8]={
       (float)-1.000000,  (float)-0.659973,  (float)-0.330017,
       (float)0.000000, (float)0.250000, (float)0.500000, 
       (float)0.750000, (float)1.00000};
   
   float gain_sq4Tbl[16]={
       (float)-1.049988, (float)-0.900024, (float)-0.750000, 
       (float)-0.599976, (float)-0.450012, (float)-0.299988, 
       (float)-0.150024, (float)0.000000, (float)0.150024, 
       (float)0.299988, (float)0.450012, (float)0.599976, 
       (float)0.750000, (float)0.900024, (float)1.049988, 
       (float)1.200012};
   
   float gain_sq5Tbl[32]={
       (float)0.037476, (float)0.075012, (float)0.112488, 
   
   
       (float)0.150024, (float)0.187500, (float)0.224976, 
       (float)0.262512, (float)0.299988, (float)0.337524, 
       (float)0.375000, (float)0.412476, (float)0.450012, 
       (float)0.487488, (float)0.525024, (float)0.562500, 
       (float)0.599976, (float)0.637512, (float)0.674988, 
       (float)0.712524, (float)0.750000, (float)0.787476, 
       (float)0.825012, (float)0.862488, (float)0.900024, 
       (float)0.937500, (float)0.974976, (float)1.012512, 
       (float)1.049988, (float)1.087524, (float)1.125000, 
       (float)1.162476, (float)1.200012};
   
   /* Enhancer - Upsamling a factor 4 (ENH_UPS0 = 4) */
   float polyphaserTbl[ENH_UPS0*(2*ENH_FL0+1)]={ 
       (float)0.000000, (float)0.000000, (float)0.000000,
   (float)1.000000, 
           (float)0.000000, (float)0.000000, (float)0.000000, 
       (float)0.015625, (float)-0.076904, (float)0.288330,
   (float)0.862061, 
           (float)-0.106445, (float)0.018799, (float)-0.015625, 
       (float)0.023682, (float)-0.124268, (float)0.601563,
   (float)0.601563, 
           (float)-0.124268, (float)0.023682, (float)-0.023682, 
       (float)0.018799, (float)-0.106445, (float)0.862061,
   (float)0.288330, 
           (float)-0.076904, (float)0.015625, (float)-0.018799};
   
   float enh_plocsTbl[ENH_NBLOCKS_TOT] = {(float)40.0, (float)120.0, 
               (float)200.0, (float)280.0, (float)360.0, 
               (float)440.0, (float)520.0, (float)600.0};
   
   /* LPC analysis and quantization */ 
   
   int dim_lsfCbTbl[LSF_NSPLIT] = {3, 3, 4};
   int size_lsfCbTbl[LSF_NSPLIT] = {64,128,128};
   
   
   float lsfmeanTbl[LPC_FILTERORDER] = { 
       (float)0.281738, (float)0.445801, (float)0.663330, 
       (float)0.962524, (float)1.251831, (float)1.533081, 
       (float)1.850586, (float)2.137817, (float)2.481445, 
       (float)2.777344};
   
   float lsf_weightTbl_30ms[6] = {(float)(1.0/2.0), (float)1.0,
   (float)(2.0/3.0), 
       (float)(1.0/3.0), (float)0.0, (float)0.0};
   
   float lsf_weightTbl_20ms[4] = {(float)(3.0/4.0), (float)(2.0/4.0), 
       (float)(1.0/4.0), (float)(0.0)};
   
   /* Hanning LPC window */
   float lpc_winTbl[BLOCKL_MAX]={
       (float)0.000183, (float)0.000671, (float)0.001526,
       (float)0.002716, (float)0.004242, (float)0.006104,
       (float)0.008301, (float)0.010834, (float)0.013702,
   
   
       (float)0.016907, (float)0.020416, (float)0.024261,
       (float)0.028442, (float)0.032928, (float)0.037750,
       (float)0.042877, (float)0.048309, (float)0.054047,
       (float)0.060089, (float)0.066437, (float)0.073090,
       (float)0.080017, (float)0.087219, (float)0.094727,
       (float)0.102509, (float)0.110535, (float)0.118835,
       (float)0.127411, (float)0.136230, (float)0.145294,
       (float)0.154602, (float)0.164154, (float)0.173920,
       (float)0.183899, (float)0.194122, (float)0.204529,
       (float)0.215149, (float)0.225952, (float)0.236938,
       (float)0.248108, (float)0.259460, (float)0.270966,
       (float)0.282654, (float)0.294464, (float)0.306396,
       (float)0.318481, (float)0.330688, (float)0.343018,
       (float)0.355438, (float)0.367981, (float)0.380585,
       (float)0.393280, (float)0.406067, (float)0.418884,
       (float)0.431763, (float)0.444702, (float)0.457672,
       (float)0.470673, (float)0.483704, (float)0.496735,
       (float)0.509766, (float)0.522797, (float)0.535828,
       (float)0.548798, (float)0.561768, (float)0.574677,
       (float)0.587524, (float)0.600342, (float)0.613068,
       (float)0.625732, (float)0.638306, (float)0.650787,
       (float)0.663147, (float)0.675415, (float)0.687561,
       (float)0.699585, (float)0.711487, (float)0.723206,
       (float)0.734802, (float)0.746216, (float)0.757477,
       (float)0.768585, (float)0.779480, (float)0.790192,
       (float)0.800720, (float)0.811005, (float)0.821106,
       (float)0.830994, (float)0.840668, (float)0.850067,
       (float)0.859253, (float)0.868225, (float)0.876892,