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/*
* Copyright (C) 2004-2010 NXP Software
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/************************************************************************/
/* */
/* Project:: PSA_01_ARMC_01 */
/* $Author: beq07716 $*/
/* $Revision: 1006 $*/
/* $Date: 2010-06-28 14:01:47 +0200 (Mon, 28 Jun 2010) $*/
/* */
/************************************************************************/
#ifndef _LVPSA_PRIVATE_H_
#define _LVPSA_PRIVATE_H_
#include "LVPSA.h"
#include "BIQUAD.h"
#include "LVPSA_QPD.h"
#include "LVM_Macros.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**********************************************************************************
CONSTANT DEFINITIONS
***********************************************************************************/
/* Memory */
#define LVPSA_INSTANCE_ALIGN 4 /* 32-bit alignment for structures */
#define LVPSA_SCRATCH_ALIGN 4 /* 32-bit alignment for long data */
#define LVPSA_COEF_ALIGN 4 /* 32-bit alignment for long words */
#define LVPSA_DATA_ALIGN 4 /* 32-bit alignment for long data */
#define LVPSA_MEMREGION_INSTANCE 0 /* Offset to instance memory region in memory table */
#define LVPSA_MEMREGION_PERSISTENT_COEF 1 /* Offset to persistent coefficients memory region in memory table */
#define LVPSA_MEMREGION_PERSISTENT_DATA 2 /* Offset to persistent taps memory region in memory table */
#define LVPSA_MEMREGION_SCRATCH 3 /* Offset to scratch memory region in memory table */
#define LVPSA_NR_SUPPORTED_RATE 9 /* From 8000Hz to 48000Hz */
#define LVPSA_NR_SUPPORTED_SPEED 3 /* LOW, MEDIUM, HIGH */
#define LVPSA_MAXBUFFERDURATION 4000 /* Maximum length in ms of the levels buffer */
#define LVPSA_MAXINPUTBLOCKSIZE 5000 /* Maximum length in mono samples of the block to process */
#define LVPSA_NBANDSMIN 1 /* Minimum number of frequency band */
#define LVPSA_NBANDSMAX 30 /* Maximum number of frequency band */
#define LVPSA_MAXCENTERFREQ 20000 /* Maximum possible center frequency */
#define LVPSA_MINPOSTGAIN -15 /* Minimum possible post gain */
#define LVPSA_MAXPOSTGAIN 15 /* Maximum possible post gain */
#define LVPSA_MINQFACTOR 25 /* Minimum possible Q factor */
#define LVPSA_MAXQFACTOR 1200 /* Maximum possible Q factor */
#define LVPSA_MAXLEVELDECAYFACTOR 0x4111 /* Decay factor for the maximum values calculation */
#define LVPSA_MAXLEVELDECAYSHIFT 14 /* Decay shift for the maximum values calculation */
#define LVPSA_MAXUNSIGNEDCHAR 0xFF
#define LVPSA_FsInvertShift 31
#define LVPSA_GAINSHIFT 11
#define LVPSA_FREQSHIFT 25
/**********************************************************************************
TYPES DEFINITIONS
***********************************************************************************/
#define LVPSA_InternalRefreshTime 0x0014 /* 20 ms (50Hz) in Q16.0 */
#define LVPSA_InternalRefreshTimeInv 0x0666 /* 1/20ms left shifted by 15 */
#define LVPSA_InternalRefreshTimeShift 15
/* Precision of the filter */
typedef enum
{
LVPSA_SimplePrecisionFilter, /* Simple precision */
LVPSA_DoublePrecisionFilter /* Double precision */
} LVPSA_BPFilterPrecision_en;
typedef struct
{
LVM_CHAR bControlPending; /* Flag incating a change of the control parameters */
LVM_UINT16 nBands; /* Number of bands of the spectrum analyzer */
LVM_UINT16 MaxInputBlockSize; /* Maximum input data buffer size */
LVPSA_ControlParams_t CurrentParams; /* Current control parameters of the module */
LVPSA_ControlParams_t NewParams; /* New control parameters given by the user */
LVPSA_MemTab_t MemoryTable;
LVPSA_BPFilterPrecision_en *pBPFiltersPrecision; /* Points a nBands elements array that contains the filter precision for each band */
Biquad_Instance_t *pBP_Instances; /* Points a nBands elements array that contains the band pass filter instance for each band */
Biquad_1I_Order2_Taps_t *pBP_Taps; /* Points a nBands elements array that contains the band pass filter taps for each band */
QPD_State_t *pQPD_States; /* Points a nBands elements array that contains the QPD filter instance for each band */
QPD_Taps_t *pQPD_Taps; /* Points a nBands elements array that contains the QPD filter taps for each band */
LVM_UINT16 *pPostGains; /* Points a nBands elements array that contains the post-filter gains for each band */
LVPSA_FilterParam_t *pFiltersParams; /* Copy of the filters parameters from the input parameters */
LVM_UINT16 nSamplesBufferUpdate; /* Number of samples to make 20ms */
LVM_INT32 BufferUpdateSamplesCount; /* Counter used to know when to put a new value in the buffer */
LVM_UINT16 nRelevantFilters; /* Number of relevent filters depending on sampling frequency and bands center frequency */
LVM_UINT16 LocalSamplesCount; /* Counter used to update the SpectralDataBufferAudioTime */
LVM_UINT16 DownSamplingFactor; /* Down sampling factor depending on the sampling frequency */
LVM_UINT16 DownSamplingCount; /* Counter used for the downsampling handling */
LVM_UINT16 SpectralDataBufferDuration; /* Length of the buffer in time (ms) defined by the application */
LVM_UINT8 *pSpectralDataBufferStart; /* Starting address of the buffer */
LVM_UINT8 *pSpectralDataBufferWritePointer; /* Current position of the writting pointer of the buffer */
LVPSA_Time SpectralDataBufferAudioTime; /* AudioTime at which the last value save occured in the buffer */
LVM_UINT32 SpectralDataBufferLength; /* Number of spectrum data value that the buffer can contain (per band)
= SpectralDataBufferDuration/20ms */
LVM_UINT8 *pPreviousPeaks; /* Points to a nBands elements array that contains the previous peak value of the level
detection. Those values are decremented after each call to the GetSpectrum function */
}LVPSA_InstancePr_t, *pLVPSA_InstancePr_t;
/**********************************************************************************
FUNCTIONS PROTOTYPE
***********************************************************************************/
/************************************************************************************/
/* */
/* FUNCTION: LVPSA_ApplyNewSettings */
/* */
/* DESCRIPTION: */
/* Reinitialize some parameters and changes filters' coefficients if */
/* some control parameters have changed. */
/* */
/* PARAMETERS: */
/* pInst Pointer to the instance */
/* */
/* RETURNS: */
/* LVPSA_OK Always succeeds */
/* */
/************************************************************************************/
LVPSA_RETURN LVPSA_ApplyNewSettings (LVPSA_InstancePr_t *pInst);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _LVPSA_PRIVATE_H */
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