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 22 extern "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 */ 61 typedef 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 */ 79 typedef 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 /****************************************************************************************/ 110 111 void LVEQNB_SetFilters(LVEQNB_Instance_t *pInstance, 112 LVEQNB_Params_t *pParams); 113 114 void LVEQNB_SetCoefficients(LVEQNB_Instance_t *pInstance); 115 116 void LVEQNB_ClearFilterHistory(LVEQNB_Instance_t *pInstance); 117 118 LVEQNB_ReturnStatus_en LVEQNB_SinglePrecCoefs(LVM_UINT16 Fs, 119 LVEQNB_BandDef_t *pFilterDefinition, 120 PK_C16_Coefs_t *pCoefficients); 121 122 LVEQNB_ReturnStatus_en LVEQNB_DoublePrecCoefs(LVM_UINT16 Fs, 123 LVEQNB_BandDef_t *pFilterDefinition, 124 PK_C32_Coefs_t *pCoefficients); 125 126 LVM_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