| /* |
| * 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. |
| */ |
| |
| #ifndef _FILTER_H_ |
| #define _FILTER_H_ |
| |
| /********************************************************************************** |
| INCLUDES |
| ***********************************************************************************/ |
| #include "LVM_Types.h" |
| #include "BIQUAD.h" |
| |
| /********************************************************************************** |
| DEFINES |
| ***********************************************************************************/ |
| #define FILTER_LOSS 32730 /* -0.01dB loss to avoid wrapping due to band ripple */ |
| #define FILTER_LOSS_FLOAT 0.998849f |
| /********************************************************************************** |
| FUNCTION PROTOTYPES |
| ***********************************************************************************/ |
| |
| LVM_FLOAT LVM_Power10( LVM_FLOAT X); |
| |
| LVM_FLOAT LVM_Polynomial(LVM_UINT16 N, |
| LVM_FLOAT *pCoefficients, |
| LVM_FLOAT X); |
| LVM_FLOAT LVM_GetOmega(LVM_UINT32 Fc, |
| LVM_Fs_en SampleRate); |
| |
| LVM_FLOAT LVM_FO_LPF( LVM_FLOAT w, |
| FO_FLOAT_Coefs_t *pCoeffs); |
| |
| LVM_FLOAT LVM_FO_HPF( LVM_FLOAT w, |
| FO_FLOAT_Coefs_t *pCoeffs); |
| /**********************************************************************************/ |
| |
| #endif /** _FILTER_H_ **/ |
| |
