134 lines
6.0 KiB
C
134 lines
6.0 KiB
C
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/*
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* Copyright (C) 2004-2010 NXP Software
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __LVEQNB_PRIVATE_H__
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#define __LVEQNB_PRIVATE_H__
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/****************************************************************************************/
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/* */
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/* Includes */
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/* */
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/****************************************************************************************/
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#include "LVEQNB.h" /* Calling or Application layer definitions */
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#include "BIQUAD.h"
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#include "LVC_Mixer.h"
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/****************************************************************************************/
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/* */
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/* Defines */
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/* */
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/****************************************************************************************/
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/* General */
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#define LVEQNB_INVALID 0xFFFF /* Invalid init parameter */
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/* Memory */
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#define LVEQNB_INSTANCE_ALIGN 4 /* 32-bit alignment for instance structures */
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#define LVEQNB_DATA_ALIGN 4 /* 32-bit alignment for structures */
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#define LVEQNB_COEF_ALIGN 4 /* 32-bit alignment for long words */
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#define LVEQNB_SCRATCHBUFFERS 4 /* Number of buffers required for inplace processing */
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#define LVEQNB_SCRATCH_ALIGN 4 /* 32-bit alignment for long data */
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#define LVEQNB_BYPASS_MIXER_TC 100 /* Bypass Mixer TC */
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/****************************************************************************************/
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/* */
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/* Types */
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/* */
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/****************************************************************************************/
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/* Filter biquad types */
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typedef enum
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{
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LVEQNB_SinglePrecision = 0,
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LVEQNB_DoublePrecision = 1,
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LVEQNB_OutOfRange = 2,
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LVEQNB_BIQUADTYPE_MAX = LVM_MAXINT_32
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} LVEQNB_BiquadType_en;
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/****************************************************************************************/
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/* */
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/* Structures */
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/* */
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/****************************************************************************************/
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/* Instance structure */
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typedef struct
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{
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/* Public parameters */
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LVEQNB_MemTab_t MemoryTable; /* Instance memory allocation table */
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LVEQNB_Params_t Params; /* Instance parameters */
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LVEQNB_Capabilities_t Capabilities; /* Instance capabilities */
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/* Aligned memory pointers */
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LVM_INT16 *pFastTemporary; /* Fast temporary data base address */
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/* Process variables */
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Biquad_2I_Order2_Taps_t *pEQNB_Taps; /* Equaliser Taps */
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Biquad_Instance_t *pEQNB_FilterState; /* State for each filter band */
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/* Filter definitions and call back */
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LVM_UINT16 NBands; /* Number of bands */
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LVEQNB_BandDef_t *pBandDefinitions; /* Filter band definitions */
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LVEQNB_BiquadType_en *pBiquadType; /* Filter biquad types */
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/* Bypass variable */
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LVMixer3_2St_st BypassMixer; /* Bypass mixer used in transitions */
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LVM_INT16 bInOperatingModeTransition; /* Operating mode transition flag */
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} LVEQNB_Instance_t;
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/****************************************************************************************/
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/* */
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/* Function prototypes */
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/* */
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/****************************************************************************************/
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void LVEQNB_SetFilters(LVEQNB_Instance_t *pInstance,
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LVEQNB_Params_t *pParams);
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void LVEQNB_SetCoefficients(LVEQNB_Instance_t *pInstance);
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void LVEQNB_ClearFilterHistory(LVEQNB_Instance_t *pInstance);
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LVEQNB_ReturnStatus_en LVEQNB_SinglePrecCoefs(LVM_UINT16 Fs,
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LVEQNB_BandDef_t *pFilterDefinition,
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PK_C16_Coefs_t *pCoefficients);
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LVEQNB_ReturnStatus_en LVEQNB_DoublePrecCoefs(LVM_UINT16 Fs,
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LVEQNB_BandDef_t *pFilterDefinition,
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PK_C32_Coefs_t *pCoefficients);
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LVM_INT32 LVEQNB_BypassMixerCallBack (void* hInstance, void *pGeneralPurpose, LVM_INT16 CallbackParam);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __LVEQNB_PRIVATE_H__ */
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