1/* 2 * Copyright (C) 2004-2010 NXP Software 3 * Copyright (C) 2010 The Android Open Source Project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18/****************************************************************************************/ 19/* */ 20/* Includes */ 21/* */ 22/****************************************************************************************/ 23#include "LVREV.h" 24 25/****************************************************************************************/ 26/* */ 27/* Tables */ 28/* */ 29/****************************************************************************************/ 30 31/* Table with supported sampling rates. The table can be indexed using LVM_Fs_en */ 32#ifndef HIGHER_FS 33const LVM_UINT16 LVM_FsTable[] = { 34 8000 , 35 11025, 36 12000, 37 16000, 38 22050, 39 24000, 40 32000, 41 44100, 42 48000 43}; 44#else 45const LVM_UINT32 LVM_FsTable[] = { 46 8000 , 47 11025, 48 12000, 49 16000, 50 22050, 51 24000, 52 32000, 53 44100, 54 48000, 55 96000, 56 192000 57}; 58#endif 59/* Table with supported sampling rates. The table can be indexed using LVM_Fs_en */ 60#ifndef HIGHER_FS 61LVM_UINT16 LVM_GetFsFromTable(LVM_Fs_en FsIndex){ 62 if (FsIndex > LVM_FS_48000) 63 return 0; 64 65 return (LVM_FsTable[FsIndex]); 66} 67#else 68LVM_UINT32 LVM_GetFsFromTable(LVM_Fs_en FsIndex){ 69 if (FsIndex > LVM_FS_192000) 70 return 0; 71 72 return (LVM_FsTable[FsIndex]); 73} 74#endif 75 76/* In order to maintain consistant input and out put signal strengths 77 output gain/attenuation is applied. This gain depends on T60 and Rooms 78 size parameters. These polynomial coefficients are calculated experimentally. 79 First value in the table is room size 80 second value is A0 81 third value is A1 82 fourth value is A2 83 fifth value is A3 84 sixth value is A4 85 86 shift value is to be added array (to use LVM_Polynomial function) 87 88 The gain is calculated using variable x=(T60*32767/7000)*32768; 89 90 first values is used to get polynomial set for given room size, 91 For room sizes which are not in the table, linear interpolation can be used. 92 93 */ 94 95/* Normalizing output including Reverb Level part (only shift up)*/ 96#ifndef BUILD_FLOAT 97const LVM_INT32 LVREV_GainPolyTable[24][5]={{1,17547434,128867434,-120988896,50761228,}, 98 {2,18256869,172666902,-193169292,88345744,}, 99 {3,16591311,139250151,-149667234,66770059,}, 100 {4,17379977,170835131,-173579321,76278163,}, 101 {5,18963512,210364934,-228623519,103435022,}, 102 {6,17796318,135756417,-144084053,64327698,}, 103 {7,17454695,174593214,-187513064,85146582,}, 104 {8,17229257,140715570,-145790588,65361740,}, 105 {9,17000547,163195946,-176733969,79562130,}, 106 {10,16711699,142476304,-133339887,58366547,}, 107 {13,18108419,149223697,-161762020,74397589,}, 108 {15,16682043,124844884,-134284487,60082180,}, 109 {17,16627346,120936430,-121766674,53146421,}, 110 {20,17338325,125432694,-126616983,56534237,}, 111 {25,16489146,99218217,-94597467,40616506,}, 112 {30,15582373,84479043,-75365006,30952348,}, 113 {40,16000669,84896611,-75031127,30696306,}, 114 {50,15087054,71695031,-59349268,23279669,}, 115 {60,15830714,68672971,-58211201,23671158,}, 116 {70,15536061,66657972,-55901437,22560153,}, 117 {75,15013145,48179917,-24138354,5232074,}, 118 {80,15688738,50195036,-34206760,11515792,}, 119 {90,16003322,48323661,-35607378,13153872,}, 120 {100,15955223,48558201,-33706865,11715792,}, 121 }; 122#else 123const LVM_FLOAT LVREV_GainPolyTable[24][5]={{1,1.045909f,7.681098f,-7.211500f,3.025605f,}, 124 {2,1.088194f,10.291749f,-11.513787f,5.265817f,}, 125 {3,0.988919f,8.299956f,-8.920862f,3.979806f,}, 126 {4,1.035927f,10.182567f,-10.346134f,4.546533f,}, 127 {5,1.130313f,12.538727f,-13.627023f,6.165208f,}, 128 {6,1.060743f,8.091713f,-8.588079f,3.834230f,}, 129 {7,1.040381f,10.406566f,-11.176650f,5.075132f,}, 130 {8,1.026944f,8.387302f,-8.689796f,3.895863f,}, 131 {9,1.013312f,9.727236f,-10.534165f,4.742272f,}, 132 {10,0.996095f,8.492249f,-7.947677f,3.478917f,}, 133 {13,1.079346f,8.894425f,-9.641768f,4.434442f,}, 134 {15,0.994327f,7.441335f,-8.003979f,3.581177f,}, 135 {17,0.991067f,7.208373f,-7.257859f,3.167774f,}, 136 {20,1.033445f,7.476371f,-7.546960f,3.369703f,}, 137 {25,0.982830f,5.913867f,-5.638448f,2.420932f,}, 138 {30,0.928782f,5.035343f,-4.492104f,1.844904f,}, 139 {40,0.953714f,5.060232f,-4.472204f,1.829642f,}, 140 {50,0.899258f,4.273357f,-3.537492f,1.387576f,}, 141 {60,0.943584f,4.093228f,-3.469658f,1.410911f,}, 142 {70,0.926021f,3.973125f,-3.331985f,1.344690f,}, 143 {75,0.894853f,2.871747f,-1.438758f,0.311856f,}, 144 {80,0.935122f,2.991857f,-2.038882f,0.686395f,}, 145 {90,0.953872f,2.880315f,-2.122365f,0.784032f,}, 146 {100,0.951005f,2.894294f,-2.009086f,0.698316f,}, 147}; 148#endif 149/* End of file */ 150 151