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Diffstat (limited to 'media/libeffects/lvm/lib/Reverb/src/LVREV_Tables.c')
| -rwxr-xr-x | media/libeffects/lvm/lib/Reverb/src/LVREV_Tables.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/media/libeffects/lvm/lib/Reverb/src/LVREV_Tables.c b/media/libeffects/lvm/lib/Reverb/src/LVREV_Tables.c new file mode 100755 index 0000000..9249a31 --- /dev/null +++ b/media/libeffects/lvm/lib/Reverb/src/LVREV_Tables.c @@ -0,0 +1,108 @@ +/* + * Copyright (C) 2004-2010 NXP Software + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/****************************************************************************************/ +/* */ +/* Project:: */ +/* $Author: beq07716 $ */ +/* $Revision: 1011 $ */ +/* $Date: 2010-06-28 15:07:08 +0200 (Mon, 28 Jun 2010) $ */ +/* */ +/****************************************************************************************/ + +/****************************************************************************************/ +/* */ +/* Includes */ +/* */ +/****************************************************************************************/ +#include "LVREV.h" + +/****************************************************************************************/ +/* */ +/* Tables */ +/* */ +/****************************************************************************************/ + +/* Table with supported sampling rates. The table can be indexed using LVM_Fs_en */ +const LVM_UINT16 LVM_FsTable[] = { + 8000 , + 11025, + 12000, + 16000, + 22050, + 24000, + 32000, + 44100, + 48000 +}; + +/* Table with supported sampling rates. The table can be indexed using LVM_Fs_en */ +LVM_UINT16 LVM_GetFsFromTable(LVM_Fs_en FsIndex){ + if (FsIndex > LVM_FS_48000) + return 0; + + return (LVM_FsTable[FsIndex]); +} + +/* In order to maintain consistant input and out put signal strengths + output gain/attenuation is applied. This gain depends on T60 and Rooms + size parameters. These polynomial coefficients are calculated experimentally. + First value in the table is room size + second value is A0 + third value is A1 + fourth value is A2 + fifth value is A3 + sixth value is A4 + + shift value is to be added array (to use LVM_Polynomial function) + + The gain is calculated using variable x=(T60*32767/7000)*32768; + + first values is used to get polynomial set for given room size, + For room sizes which are not in the table, linear interpolation can be used. + + */ + +/* Normalizing output including Reverb Level part (only shift up)*/ +const LVM_INT32 LVREV_GainPolyTable[24][5]={{1,17547434,128867434,-120988896,50761228,}, + {2,18256869,172666902,-193169292,88345744,}, + {3,16591311,139250151,-149667234,66770059,}, + {4,17379977,170835131,-173579321,76278163,}, + {5,18963512,210364934,-228623519,103435022,}, + {6,17796318,135756417,-144084053,64327698,}, + {7,17454695,174593214,-187513064,85146582,}, + {8,17229257,140715570,-145790588,65361740,}, + {9,17000547,163195946,-176733969,79562130,}, + {10,16711699,142476304,-133339887,58366547,}, + {13,18108419,149223697,-161762020,74397589,}, + {15,16682043,124844884,-134284487,60082180,}, + {17,16627346,120936430,-121766674,53146421,}, + {20,17338325,125432694,-126616983,56534237,}, + {25,16489146,99218217,-94597467,40616506,}, + {30,15582373,84479043,-75365006,30952348,}, + {40,16000669,84896611,-75031127,30696306,}, + {50,15087054,71695031,-59349268,23279669,}, + {60,15830714,68672971,-58211201,23671158,}, + {70,15536061,66657972,-55901437,22560153,}, + {75,15013145,48179917,-24138354,5232074,}, + {80,15688738,50195036,-34206760,11515792,}, + {90,16003322,48323661,-35607378,13153872,}, + {100,15955223,48558201,-33706865,11715792,}, + }; + +/* End of file */ + |