AAX_FastInterpolatedTableLookup.h

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/*================================================================================================*/
/*
 *  Copyright 2013-2015, 2019, 2023-2024 Avid Technology, Inc.
 *  All rights reserved.
 *  
 *  This file is part of the Avid AAX SDK.
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 *  Agreement and Avid Privacy Policy.
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 *  AAX SDK License: https://developer.avid.com/aax
 *  Privacy Policy: https://www.avid.com/legal/privacy-policy-statement
 *  
 *  Or: You may also use this code under the terms of the GPL v3 (see
 *  www.gnu.org/licenses).
 *  
 *  THE AAX SDK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
 *  EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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 */
 
/*================================================================================================*/
#pragma once
 
#ifndef AAX_FASTINTERPOLATEDTABLELOOKUP_H
#define AAX_FASTINTERPOLATEDTABLELOOKUP_H
 
#include "AAX_Quantize.h"
 
//==============================================================================
//
//  NOTE:
//  Construtors and destructors are not call because state and coefficientrs blocks 
//  are not allocated as classes
//
 
#include AAX_ALIGN_FILE_BEGIN
#include AAX_ALIGN_FILE_ALG
#include AAX_ALIGN_FILE_END
 
template<class TFLOAT, class DFLOAT>
class AAX_FastInterpolatedTableLookup
{
public:
    
    void SetParameters(int iTableSize, TFLOAT iMin=0.0, TFLOAT iMax=1.0, int iNumTables=1)
    {
        mTableSizeM1=(TFLOAT)(iTableSize-1);
        mTableSize=(TFLOAT)iTableSize;
        mIntTableSizeM1=iTableSize-1;
        mMin=iMin;
        mMax=iMax;
        mMaxMinusMin=iMax-iMin;
        mTableSizeM1DivMaxMinusMin=TFLOAT(iTableSize-1)/(iMax-iMin); //Two divides??
        mTableSizeDivMaxMinusMin=TFLOAT(iTableSize)/(iMax-iMin);
        mNumTables=iNumTables;
    }
    
    DFLOAT  DoTableLookupExtraFast(const TFLOAT* const iTable, DFLOAT iValue) const;
    void    DoTableLookupExtraFastMulti(const TFLOAT* iTable, DFLOAT iValue, DFLOAT* oValues) const;
 
    void    DoTableLookupExtraFast(const TFLOAT* const iTable, const TFLOAT* const inpBuf, DFLOAT* const outBuf, int blockSize);
 
    TFLOAT GetMin()         { return mMin; };
    TFLOAT GetMaxMinusMin() { return mMaxMinusMin; };
 
private:
 
    TFLOAT  mTableSizeM1;
    int     mIntTableSizeM1;
    TFLOAT  mTableSizeM1DivMaxMinusMin;
    TFLOAT  mMin;
    TFLOAT  mMax;
    TFLOAT  mMaxMinusMin;
    TFLOAT  mTableSize;
    TFLOAT  mTableSizeDivMaxMinusMin;
    int     mNumTables;             //This is used for multi-element lookups
};
 
#include AAX_ALIGN_FILE_BEGIN
#include AAX_ALIGN_FILE_RESET
#include AAX_ALIGN_FILE_END
 
// Template implementation
#include "AAX_FastInterpolatedTableLookup.hpp"
 
#endif // AAX_FASTINTERPOLATEDTABLELOOKUP_H