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 __LVEQNB_PRIVATE_H__ 19#define __LVEQNB_PRIVATE_H__ 20 21#ifdef __cplusplus 22extern "C" { 23#endif /* __cplusplus */ 24 25 26/****************************************************************************************/ 27/* */ 28/* Includes */ 29/* */ 30/****************************************************************************************/ 31 32#include "LVEQNB.h" /* Calling or Application layer definitions */ 33#include "BIQUAD.h" 34#include "LVC_Mixer.h" 35 36/****************************************************************************************/ 37/* */ 38/* Defines */ 39/* */ 40/****************************************************************************************/ 41 42/* General */ 43#define LVEQNB_INVALID 0xFFFF /* Invalid init parameter */ 44 45/* Memory */ 46#define LVEQNB_INSTANCE_ALIGN 4 /* 32-bit alignment for instance structures */ 47#define LVEQNB_DATA_ALIGN 4 /* 32-bit alignment for structures */ 48#define LVEQNB_COEF_ALIGN 4 /* 32-bit alignment for long words */ 49#define LVEQNB_SCRATCHBUFFERS 4 /* Number of buffers required for inplace processing */ 50#define LVEQNB_SCRATCH_ALIGN 4 /* 32-bit alignment for long data */ 51 52#define LVEQNB_BYPASS_MIXER_TC 100 /* Bypass Mixer TC */ 53 54/****************************************************************************************/ 55/* */ 56/* Types */ 57/* */ 58/****************************************************************************************/ 59 60/* Filter biquad types */ 61typedef enum 62{ 63 LVEQNB_SinglePrecision = 0, 64 LVEQNB_DoublePrecision = 1, 65 LVEQNB_OutOfRange = 2, 66 LVEQNB_BIQUADTYPE_MAX = LVM_MAXINT_32 67} LVEQNB_BiquadType_en; 68 69 70/****************************************************************************************/ 71/* */ 72/* Structures */ 73/* */ 74/****************************************************************************************/ 75 76 77 78/* Instance structure */ 79typedef struct 80{ 81 /* Public parameters */ 82 LVEQNB_MemTab_t MemoryTable; /* Instance memory allocation table */ 83 LVEQNB_Params_t Params; /* Instance parameters */ 84 LVEQNB_Capabilities_t Capabilities; /* Instance capabilities */ 85 86 /* Aligned memory pointers */ 87 LVM_INT16 *pFastTemporary; /* Fast temporary data base address */ 88 89 /* Process variables */ 90 Biquad_2I_Order2_Taps_t *pEQNB_Taps; /* Equaliser Taps */ 91 Biquad_Instance_t *pEQNB_FilterState; /* State for each filter band */ 92 93 /* Filter definitions and call back */ 94 LVM_UINT16 NBands; /* Number of bands */ 95 LVEQNB_BandDef_t *pBandDefinitions; /* Filter band definitions */ 96 LVEQNB_BiquadType_en *pBiquadType; /* Filter biquad types */ 97 98 /* Bypass variable */ 99 LVMixer3_2St_st BypassMixer; /* Bypass mixer used in transitions */ 100 LVM_INT16 bInOperatingModeTransition; /* Operating mode transition flag */ 101 102} LVEQNB_Instance_t; 103 104 105/****************************************************************************************/ 106/* */ 107/* Function prototypes */ 108/* */ 109/****************************************************************************************/ 110 111void LVEQNB_SetFilters(LVEQNB_Instance_t *pInstance, 112 LVEQNB_Params_t *pParams); 113 114void LVEQNB_SetCoefficients(LVEQNB_Instance_t *pInstance); 115 116void LVEQNB_ClearFilterHistory(LVEQNB_Instance_t *pInstance); 117 118LVEQNB_ReturnStatus_en LVEQNB_SinglePrecCoefs(LVM_UINT16 Fs, 119 LVEQNB_BandDef_t *pFilterDefinition, 120 PK_C16_Coefs_t *pCoefficients); 121 122LVEQNB_ReturnStatus_en LVEQNB_DoublePrecCoefs(LVM_UINT16 Fs, 123 LVEQNB_BandDef_t *pFilterDefinition, 124 PK_C32_Coefs_t *pCoefficients); 125 126LVM_INT32 LVEQNB_BypassMixerCallBack (void* hInstance, void *pGeneralPurpose, LVM_INT16 CallbackParam); 127 128#ifdef __cplusplus 129} 130#endif /* __cplusplus */ 131 132#endif /* __LVEQNB_PRIVATE_H__ */ 133 134