Home | History | Annotate | Download | only in silk 
      1 /***********************************************************************
      2 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
      3 Redistribution and use in source and binary forms, with or without
      4 modification, are permitted provided that the following conditions
      5 are met:
      6 - Redistributions of source code must retain the above copyright notice,
      7 this list of conditions and the following disclaimer.
      8 - Redistributions in binary form must reproduce the above copyright
      9 notice, this list of conditions and the following disclaimer in the
     10 documentation and/or other materials provided with the distribution.
     11 - Neither the name of Internet Society, IETF or IETF Trust, nor the
     12 names of specific contributors, may be used to endorse or promote
     13 products derived from this software without specific prior written
     14 permission.
     15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
     16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
     19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     25 POSSIBILITY OF SUCH DAMAGE.
     26 ***********************************************************************/
     27 
     28 #ifdef HAVE_CONFIG_H
     29 #include "config.h"
     30 #endif
     31 
     32 #include "structs.h"
     33 #include "define.h"
     34 #include "tables.h"
     35 
     36 #ifdef __cplusplus
     37 extern "C"
     38 {
     39 #endif
     40 
     41 /* Tables for stereo predictor coding */
     42 const opus_int16 silk_stereo_pred_quant_Q13[ STEREO_QUANT_TAB_SIZE ] = {
     43     -13732, -10050, -8266, -7526, -6500, -5000, -2950,  -820,
     44        820,   2950,  5000,  6500,  7526,  8266, 10050, 13732
     45 };
     46 const opus_uint8  silk_stereo_pred_joint_iCDF[ 25 ] = {
     47     249, 247, 246, 245, 244,
     48     234, 210, 202, 201, 200,
     49     197, 174,  82,  59,  56,
     50      55,  54,  46,  22,  12,
     51      11,  10,   9,   7,   0
     52 };
     53 const opus_uint8  silk_stereo_only_code_mid_iCDF[ 2 ] = { 64, 0 };
     54 
     55 /* Tables for LBRR flags */
     56 static const opus_uint8 silk_LBRR_flags_2_iCDF[ 3 ] = { 203, 150, 0 };
     57 static const opus_uint8 silk_LBRR_flags_3_iCDF[ 7 ] = { 215, 195, 166, 125, 110, 82, 0 };
     58 const opus_uint8 * const silk_LBRR_flags_iCDF_ptr[ 2 ] = {
     59     silk_LBRR_flags_2_iCDF,
     60     silk_LBRR_flags_3_iCDF
     61 };
     62 
     63 /* Table for LSB coding */
     64 const opus_uint8 silk_lsb_iCDF[ 2 ] = { 120, 0 };
     65 
     66 /* Tables for LTPScale */
     67 const opus_uint8 silk_LTPscale_iCDF[ 3 ] = { 128, 64, 0 };
     68 
     69 /* Tables for signal type and offset coding */
     70 const opus_uint8 silk_type_offset_VAD_iCDF[ 4 ] = {
     71        232,    158,    10,      0
     72 };
     73 const opus_uint8 silk_type_offset_no_VAD_iCDF[ 2 ] = {
     74        230,      0
     75 };
     76 
     77 /* Tables for NLSF interpolation factor */
     78 const opus_uint8 silk_NLSF_interpolation_factor_iCDF[ 5 ] = { 243, 221, 192, 181, 0 };
     79 
     80 /* Quantization offsets */
     81 const opus_int16  silk_Quantization_Offsets_Q10[ 2 ][ 2 ] = {
     82     { OFFSET_UVL_Q10, OFFSET_UVH_Q10 }, { OFFSET_VL_Q10, OFFSET_VH_Q10 }
     83 };
     84 
     85 /* Table for LTPScale */
     86 const opus_int16 silk_LTPScales_table_Q14[ 3 ] = { 15565, 12288, 8192 };
     87 
     88 /* Uniform entropy tables */
     89 const opus_uint8 silk_uniform3_iCDF[ 3 ] = { 171, 85, 0 };
     90 const opus_uint8 silk_uniform4_iCDF[ 4 ] = { 192, 128, 64, 0 };
     91 const opus_uint8 silk_uniform5_iCDF[ 5 ] = { 205, 154, 102, 51, 0 };
     92 const opus_uint8 silk_uniform6_iCDF[ 6 ] = { 213, 171, 128, 85, 43, 0 };
     93 const opus_uint8 silk_uniform8_iCDF[ 8 ] = { 224, 192, 160, 128, 96, 64, 32, 0 };
     94 
     95 const opus_uint8 silk_NLSF_EXT_iCDF[ 7 ] = { 100, 40, 16, 7, 3, 1, 0 };
     96 
     97 /*  Elliptic/Cauer filters designed with 0.1 dB passband ripple,
     98         80 dB minimum stopband attenuation, and
     99         [0.95 : 0.15 : 0.35] normalized cut off frequencies. */
    100 
    101 /* Interpolation points for filter coefficients used in the bandwidth transition smoother */
    102 const opus_int32 silk_Transition_LP_B_Q28[ TRANSITION_INT_NUM ][ TRANSITION_NB ] =
    103 {
    104 {    250767114,  501534038,  250767114  },
    105 {    209867381,  419732057,  209867381  },
    106 {    170987846,  341967853,  170987846  },
    107 {    131531482,  263046905,  131531482  },
    108 {     89306658,  178584282,   89306658  }
    109 };
    110 
    111 /* Interpolation points for filter coefficients used in the bandwidth transition smoother */
    112 const opus_int32 silk_Transition_LP_A_Q28[ TRANSITION_INT_NUM ][ TRANSITION_NA ] =
    113 {
    114 {    506393414,  239854379  },
    115 {    411067935,  169683996  },
    116 {    306733530,  116694253  },
    117 {    185807084,   77959395  },
    118 {     35497197,   57401098  }
    119 };
    120 
    121 #ifdef __cplusplus
    122 }
    123 #endif
    124 
    125