media/libeffects/lvm/lib/SpectrumAnalyzer/src/LVPSA_Tables.h

/*
 * Copyright (C) 2019 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.
 */

#ifndef __LVPSA_TABLES_H__
#define __LVPSA_TABLES_H__

/************************************************************************************/
/*                                                                                  */
/*  Sample rate table                                                               */
/*                                                                                  */
/************************************************************************************/

/*
 * Sample rate table for converting between the enumerated type and the actual
 * frequency
 */
#ifndef HIGHER_FS
extern const LVM_UINT16    LVPSA_SampleRateTab[];
#else
extern const LVM_UINT32    LVPSA_SampleRateTab[];
#endif

/************************************************************************************/
/*                                                                                  */
/*  Sample rate inverse table                                                       */
/*                                                                                  */
/************************************************************************************/

/*
 * Sample rate table for converting between the enumerated type and the actual
 * frequency
 */
extern const LVM_UINT32    LVPSA_SampleRateInvTab[];

/************************************************************************************/
/*                                                                                  */
/*  Number of samples in 20ms                                                       */
/*                                                                                  */
/************************************************************************************/

/*
 * Table for converting between the enumerated type and the number of samples
 * during 20ms
 */
extern const LVM_UINT16    LVPSA_nSamplesBufferUpdate[];

/************************************************************************************/
/*                                                                                  */
/*  Down sampling factors                                                           */
/*                                                                                  */
/************************************************************************************/

/*
 * Table for converting between the enumerated type and the down sampling factor
 */
extern const LVM_UINT16    LVPSA_DownSamplingFactor[];

/************************************************************************************/
/*                                                                                  */
/*  Coefficient calculation tables                                                  */
/*                                                                                  */
/************************************************************************************/

/*
 * Table for 2 * Pi / Fs
 */
extern const LVM_INT16     LVPSA_TwoPiOnFsTable[];
extern const LVM_FLOAT     LVPSA_Float_TwoPiOnFsTable[];

/*
 * Gain table
 */
extern const LVM_INT16     LVPSA_GainTable[];
extern const LVM_FLOAT     LVPSA_Float_GainTable[];

/************************************************************************************/
/*                                                                                  */
/*  Cosone polynomial coefficients                                                  */
/*                                                                                  */
/************************************************************************************/

/*
 * Coefficients for calculating the cosine with the equation:
 *
 *  Cos(x) = (2^Shifts)*(a0 + a1*x + a2*x^2 + a3*x^3 + a4*x^4 + a5*x^5)
 *
 * These coefficients expect the input, x, to be in the range 0 to 32768 respresenting
 * a range of 0 to Pi. The output is in the range 32767 to -32768 representing the range
 * +1.0 to -1.0
 */
extern const LVM_INT16     LVPSA_CosCoef[];
extern const LVM_FLOAT     LVPSA_Float_CosCoef[];

/*
 * Coefficients for calculating the cosine error with the equation:
 *
 *  CosErr(x) = (2^Shifts)*(a0 + a1*x + a2*x^2 + a3*x^3)
 *
 * These coefficients expect the input, x, to be in the range 0 to 32768 respresenting
 * a range of 0 to Pi/25. The output is in the range 0 to 32767 representing the range
 * 0.0 to 0.0078852986
 *
 * This is used to give a double precision cosine over the range 0 to Pi/25 using the
 * the equation:
 *
 * Cos(x) = 1.0 - CosErr(x)
 */
extern const LVM_INT16     LVPSA_DPCosCoef[];
extern const LVM_FLOAT    LVPSA_Float_DPCosCoef[];

/************************************************************************************/
/*                                                                                  */
/*  Quasi peak filter coefficients table                                            */
/*                                                                                  */
/************************************************************************************/
extern const QPD_C32_Coefs     LVPSA_QPD_Coefs[];
extern const QPD_FLOAT_Coefs     LVPSA_QPD_Float_Coefs[];

#endif /* __LVPSA_TABLES_H__ */