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#ifndef _FILTER_H_ 19#define _FILTER_H_ 20 21#ifdef __cplusplus 22extern "C" { 23#endif /* __cplusplus */ 24 25/********************************************************************************** 26 INCLUDES 27***********************************************************************************/ 28#include "LVM_Types.h" 29#include "BIQUAD.h" 30 31 32/********************************************************************************** 33 DEFINES 34***********************************************************************************/ 35#define FILTER_LOSS 32730 /* -0.01dB loss to avoid wrapping due to band ripple */ 36 37/********************************************************************************** 38 FUNCTION PROTOTYPES 39***********************************************************************************/ 40 41LVM_INT32 LVM_Polynomial(LVM_UINT16 N, 42 LVM_INT32 *pCoefficients, 43 LVM_INT32 X); 44 45LVM_INT32 LVM_Power10( LVM_INT32 X); 46 47LVM_INT32 LVM_FO_LPF( LVM_INT32 w, 48 FO_C32_Coefs_t *pCoeffs); 49 50LVM_INT32 LVM_FO_HPF( LVM_INT32 w, 51 FO_C32_Coefs_t *pCoeffs); 52 53LVM_INT32 LVM_GetOmega(LVM_UINT16 Fc, 54 LVM_Fs_en SampleRate); 55 56/**********************************************************************************/ 57#ifdef __cplusplus 58} 59#endif /* __cplusplus */ 60 61#endif /** _FILTER_H_ **/ 62 63