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| 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 /* Piece-wise linear mapping from bitrate in kbps to coding quality in dB SNR */ |
| 42 const opus_int32 silk_TargetRate_table_NB[ TARGET_RATE_TAB_SZ ] = { |
| 43 0, 8000, 9400, 11500, 13500, 17500, 25000, MAX_TARGET_RATE_BPS |
| 44 }; |
| 45 const opus_int32 silk_TargetRate_table_MB[ TARGET_RATE_TAB_SZ ] = { |
| 46 0, 9000, 12000, 14500, 18500, 24500, 35500, MAX_TARGET_RATE_BPS |
| 47 }; |
| 48 const opus_int32 silk_TargetRate_table_WB[ TARGET_RATE_TAB_SZ ] = { |
| 49 0, 10500, 14000, 17000, 21500, 28500, 42000, MAX_TARGET_RATE_BPS |
| 50 }; |
| 51 const opus_int16 silk_SNR_table_Q1[ TARGET_RATE_TAB_SZ ] = { |
| 52 18, 29, 38, 40, 46, 52, 62, 84 |
| 53 }; |
| 54 |
| 55 /* Tables for stereo predictor coding */ |
| 56 const opus_int16 silk_stereo_pred_quant_Q13[ STEREO_QUANT_TAB_SIZE ] = { |
| 57 -13732, -10050, -8266, -7526, -6500, -5000, -2950, -820, |
| 58 820, 2950, 5000, 6500, 7526, 8266, 10050, 13732 |
| 59 }; |
| 60 const opus_uint8 silk_stereo_pred_joint_iCDF[ 25 ] = { |
| 61 249, 247, 246, 245, 244, |
| 62 234, 210, 202, 201, 200, |
| 63 197, 174, 82, 59, 56, |
| 64 55, 54, 46, 22, 12, |
| 65 11, 10, 9, 7, 0 |
| 66 }; |
| 67 const opus_uint8 silk_stereo_only_code_mid_iCDF[ 2 ] = { 64, 0 }; |
| 68 |
| 69 /* Tables for LBRR flags */ |
| 70 const opus_uint8 silk_LBRR_flags_2_iCDF[ 3 ] = { 203, 150, 0 }; |
| 71 const opus_uint8 silk_LBRR_flags_3_iCDF[ 7 ] = { 215, 195, 166, 125, 110, 82, 0
}; |
| 72 const opus_uint8 * const silk_LBRR_flags_iCDF_ptr[ 2 ] = { |
| 73 silk_LBRR_flags_2_iCDF, |
| 74 silk_LBRR_flags_3_iCDF |
| 75 }; |
| 76 |
| 77 /* Table for LSB coding */ |
| 78 const opus_uint8 silk_lsb_iCDF[ 2 ] = { 120, 0 }; |
| 79 |
| 80 /* Tables for LTPScale */ |
| 81 const opus_uint8 silk_LTPscale_iCDF[ 3 ] = { 128, 64, 0 }; |
| 82 |
| 83 /* Tables for signal type and offset coding */ |
| 84 const opus_uint8 silk_type_offset_VAD_iCDF[ 4 ] = { |
| 85 232, 158, 10, 0 |
| 86 }; |
| 87 const opus_uint8 silk_type_offset_no_VAD_iCDF[ 2 ] = { |
| 88 230, 0 |
| 89 }; |
| 90 |
| 91 /* Tables for NLSF interpolation factor */ |
| 92 const opus_uint8 silk_NLSF_interpolation_factor_iCDF[ 5 ] = { 243, 221, 192, 181
, 0 }; |
| 93 |
| 94 /* Quantization offsets */ |
| 95 const opus_int16 silk_Quantization_Offsets_Q10[ 2 ][ 2 ] = { |
| 96 { OFFSET_UVL_Q10, OFFSET_UVH_Q10 }, { OFFSET_VL_Q10, OFFSET_VH_Q10 } |
| 97 }; |
| 98 |
| 99 /* Table for LTPScale */ |
| 100 const opus_int16 silk_LTPScales_table_Q14[ 3 ] = { 15565, 12288, 8192 }; |
| 101 |
| 102 /* Uniform entropy tables */ |
| 103 const opus_uint8 silk_uniform3_iCDF[ 3 ] = { 171, 85, 0 }; |
| 104 const opus_uint8 silk_uniform4_iCDF[ 4 ] = { 192, 128, 64, 0 }; |
| 105 const opus_uint8 silk_uniform5_iCDF[ 5 ] = { 205, 154, 102, 51, 0 }; |
| 106 const opus_uint8 silk_uniform6_iCDF[ 6 ] = { 213, 171, 128, 85, 43, 0 }; |
| 107 const opus_uint8 silk_uniform8_iCDF[ 8 ] = { 224, 192, 160, 128, 96, 64, 32, 0 }
; |
| 108 |
| 109 const opus_uint8 silk_NLSF_EXT_iCDF[ 7 ] = { 100, 40, 16, 7, 3, 1, 0 }; |
| 110 |
| 111 /* Elliptic/Cauer filters designed with 0.1 dB passband ripple, |
| 112 80 dB minimum stopband attenuation, and |
| 113 [0.95 : 0.15 : 0.35] normalized cut off frequencies. */ |
| 114 |
| 115 /* Interpolation points for filter coefficients used in the bandwidth transition
smoother */ |
| 116 const opus_int32 silk_Transition_LP_B_Q28[ TRANSITION_INT_NUM ][ TRANSITION_NB ]
= |
| 117 { |
| 118 { 250767114, 501534038, 250767114 }, |
| 119 { 209867381, 419732057, 209867381 }, |
| 120 { 170987846, 341967853, 170987846 }, |
| 121 { 131531482, 263046905, 131531482 }, |
| 122 { 89306658, 178584282, 89306658 } |
| 123 }; |
| 124 |
| 125 /* Interpolation points for filter coefficients used in the bandwidth transition
smoother */ |
| 126 const opus_int32 silk_Transition_LP_A_Q28[ TRANSITION_INT_NUM ][ TRANSITION_NA ]
= |
| 127 { |
| 128 { 506393414, 239854379 }, |
| 129 { 411067935, 169683996 }, |
| 130 { 306733530, 116694253 }, |
| 131 { 185807084, 77959395 }, |
| 132 { 35497197, 57401098 } |
| 133 }; |
| 134 |
| 135 #ifdef __cplusplus |
| 136 } |
| 137 #endif |
| 138 |
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