Filter.h revision 2c8e5cab3faa6d360e222b7a6c40a80083d021ac 
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/*     Project::                                                        */
21/*     $Author: beq07716 $*/
22/*     $Revision: 771 $*/
23/*     $Date: 2010-06-14 10:41:36 +0200 (Mon, 14 Jun 2010) $*/
24/*                                                                      */
25/************************************************************************/
26
27#ifndef _FILTER_H_
28#define _FILTER_H_
29
30#ifdef __cplusplus
31extern "C" {
32#endif /* __cplusplus */
33
34/**********************************************************************************
35   INCLUDES
36***********************************************************************************/
37#include "LVM_Types.h"
38#include "BIQUAD.h"
39
40
41/**********************************************************************************
42   DEFINES
43***********************************************************************************/
44#define FILTER_LOSS     32730       /* -0.01dB loss to avoid wrapping due to band ripple */
45
46/**********************************************************************************
47   FUNCTION PROTOTYPES
48***********************************************************************************/
49
50LVM_INT32 LVM_Polynomial(LVM_UINT16 N,
51                         LVM_INT32  *pCoefficients,
52                         LVM_INT32  X);
53
54LVM_INT32 LVM_Power10(   LVM_INT32  X);
55
56LVM_INT32 LVM_FO_LPF(    LVM_INT32  w,
57                         FO_C32_Coefs_t  *pCoeffs);
58
59LVM_INT32 LVM_FO_HPF(    LVM_INT32  w,
60                         FO_C32_Coefs_t  *pCoeffs);
61
62LVM_INT32   LVM_GetOmega(LVM_UINT16  Fc,
63                         LVM_Fs_en   SampleRate);
64
65/**********************************************************************************/
66#ifdef __cplusplus
67}
68#endif /* __cplusplus */
69
70#endif  /** _FILTER_H_ **/
71
72