Quelle  lookup_data.h

/********************************************************************
 *                                                                  *
 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
 *                                                                  *
 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
 * by the Xiph.Org Foundation https://xiph.org/                     *
 *                                                                  *
 ********************************************************************

  function: lookup data; generated by lookups.pl; edit there

 ********************************************************************/

#ifndef _V_LOOKUP_DATA_H_

#ifdef FLOAT_LOOKUP
#define COS_LOOKUP_SZ 128
static const float COS_LOOKUP[COS_LOOKUP_SZ+1]={
        +1.0000000000000f,+0.9996988186962f,+0.9987954562052f,+0.9972904566787f,
        +0.9951847266722f,+0.9924795345987f,+0.9891765099648f,+0.9852776423889f,
        +0.9807852804032f,+0.9757021300385f,+0.9700312531945f,+0.9637760657954f,
        +0.9569403357322f,+0.9495281805930f,+0.9415440651830f,+0.9329927988347f,
        +0.9238795325113f,+0.9142097557035f,+0.9039892931234f,+0.8932243011955f,
        +0.8819212643484f,+0.8700869911087f,+0.8577286100003f,+0.8448535652497f,
        +0.8314696123025f,+0.8175848131516f,+0.8032075314806f,+0.7883464276266f,
        +0.7730104533627f,+0.7572088465065f,+0.7409511253550f,+0.7242470829515f,
        +0.7071067811865f,+0.6895405447371f,+0.6715589548470f,+0.6531728429538f,
        +0.6343932841636f,+0.6152315905806f,+0.5956993044924f,+0.5758081914178f,
        +0.5555702330196f,+0.5349976198871f,+0.5141027441932f,+0.4928981922298f,
        +0.4713967368260f,+0.4496113296546f,+0.4275550934303f,+0.4052413140050f,
        +0.3826834323651f,+0.3598950365350f,+0.3368898533922f,+0.3136817403989f,
        +0.2902846772545f,+0.2667127574749f,+0.2429801799033f,+0.2191012401569f,
        +0.1950903220161f,+0.1709618887603f,+0.1467304744554f,+0.1224106751992f,
        +0.0980171403296f,+0.0735645635997f,+0.0490676743274f,+0.0245412285229f,
        +0.0000000000000f,-0.0245412285229f,-0.0490676743274f,-0.0735645635997f,
        -0.0980171403296f,-0.1224106751992f,-0.1467304744554f,-0.1709618887603f,
        -0.1950903220161f,-0.2191012401569f,-0.2429801799033f,-0.2667127574749f,
        -0.2902846772545f,-0.3136817403989f,-0.3368898533922f,-0.3598950365350f,
        -0.3826834323651f,-0.4052413140050f,-0.4275550934303f,-0.4496113296546f,
        -0.4713967368260f,-0.4928981922298f,-0.5141027441932f,-0.5349976198871f,
        -0.5555702330196f,-0.5758081914178f,-0.5956993044924f,-0.6152315905806f,
        -0.6343932841636f,-0.6531728429538f,-0.6715589548470f,-0.6895405447371f,
        -0.7071067811865f,-0.7242470829515f,-0.7409511253550f,-0.7572088465065f,
        -0.7730104533627f,-0.7883464276266f,-0.8032075314806f,-0.8175848131516f,
        -0.8314696123025f,-0.8448535652497f,-0.8577286100003f,-0.8700869911087f,
        -0.8819212643484f,-0.8932243011955f,-0.9039892931234f,-0.9142097557035f,
        -0.9238795325113f,-0.9329927988347f,-0.9415440651830f,-0.9495281805930f,
        -0.9569403357322f,-0.9637760657954f,-0.9700312531945f,-0.9757021300385f,
        -0.9807852804032f,-0.9852776423889f,-0.9891765099648f,-0.9924795345987f,
        -0.9951847266722f,-0.9972904566787f,-0.9987954562052f,-0.9996988186962f,
        -1.0000000000000f,
};

#define INVSQ_LOOKUP_SZ 32
static const float INVSQ_LOOKUP[INVSQ_LOOKUP_SZ+1]={
        1.414213562373f,1.392621247646f,1.371988681140f,1.352246807566f,
        1.333333333333f,1.315191898443f,1.297771369046f,1.281025230441f,
        1.264911064067f,1.249390095109f,1.234426799697f,1.219988562661f,
        1.206045378311f,1.192569588000f,1.179535649239f,1.166919931983f,
        1.154700538379f,1.142857142857f,1.131370849898f,1.120224067222f,
        1.109400392450f,1.098884511590f,1.088662107904f,1.078719779941f,
        1.069044967650f,1.059625885652f,1.050451462878f,1.041511287847f,
        1.032795558989f,1.024295039463f,1.016001016002f,1.007905261358f,
        1.000000000000f,
};

#define INVSQ2EXP_LOOKUP_MIN (-32)
#define INVSQ2EXP_LOOKUP_MAX 32
static const float INVSQ2EXP_LOOKUP[INVSQ2EXP_LOOKUP_MAX-\
                              INVSQ2EXP_LOOKUP_MIN+1]={
                 65536.f,    46340.95001f,         32768.f,    23170.47501f,
                 16384.f,     11585.2375f,          8192.f,    5792.618751f,
                  4096.f,    2896.309376f,          2048.f,    1448.154688f,
                  1024.f,    724.0773439f,           512.f,     362.038672f,
                   256.f,     181.019336f,           128.f,    90.50966799f,
                    64.f,      45.254834f,            32.f,      22.627417f,
                    16.f,     11.3137085f,             8.f,    5.656854249f,
                     4.f,    2.828427125f,             2.f,    1.414213562f,
                     1.f,   0.7071067812f,            0.5f,   0.3535533906f,
                   0.25f,   0.1767766953f,          0.125f,  0.08838834765f,
                 0.0625f,  0.04419417382f,        0.03125f,  0.02209708691f,
               0.015625f,  0.01104854346f,      0.0078125f, 0.005524271728f,
             0.00390625f, 0.002762135864f,    0.001953125f, 0.001381067932f,
           0.0009765625f, 0.000690533966f,  0.00048828125f, 0.000345266983f,
         0.000244140625f,0.0001726334915f,0.0001220703125f,8.631674575e-05f,
        6.103515625e-05f,4.315837288e-05f,3.051757812e-05f,2.157918644e-05f,
        1.525878906e-05f,
};

#endif

#define FROMdB_LOOKUP_SZ 35
#define FROMdB2_LOOKUP_SZ 32
#define FROMdB_SHIFT 5
#define FROMdB2_SHIFT 3
#define FROMdB2_MASK 31

#ifdef FLOAT_LOOKUP
static const float FROMdB_LOOKUP[FROMdB_LOOKUP_SZ]={
                     1.f,   0.6309573445f,   0.3981071706f,   0.2511886432f,
           0.1584893192f,            0.1f,  0.06309573445f,  0.03981071706f,
          0.02511886432f,  0.01584893192f,           0.01f, 0.006309573445f,
         0.003981071706f, 0.002511886432f, 0.001584893192f,          0.001f,
        0.0006309573445f,0.0003981071706f,0.0002511886432f,0.0001584893192f,
                 0.0001f,6.309573445e-05f,3.981071706e-05f,2.511886432e-05f,
        1.584893192e-05f,          1e-05f,6.309573445e-06f,3.981071706e-06f,
        2.511886432e-06f,1.584893192e-06f,          1e-06f,6.309573445e-07f,
        3.981071706e-07f,2.511886432e-07f,1.584893192e-07f,
};

static const float FROMdB2_LOOKUP[FROMdB2_LOOKUP_SZ]={
           0.9928302478f,   0.9786445908f,   0.9646616199f,   0.9508784391f,
           0.9372921937f,     0.92390007f,   0.9106992942f,   0.8976871324f,
           0.8848608897f,   0.8722179097f,   0.8597555737f,   0.8474713009f,
            0.835362547f,   0.8234268041f,   0.8116616003f,   0.8000644989f,
           0.7886330981f,   0.7773650302f,   0.7662579617f,    0.755309592f,
           0.7445176537f,   0.7338799116f,   0.7233941627f,   0.7130582353f,
           0.7028699885f,   0.6928273125f,   0.6829281272f,   0.6731703824f,
           0.6635520573f,   0.6540711597f,   0.6447257262f,   0.6355138211f,
};
#endif

#ifdef INT_LOOKUP

#define INVSQ_LOOKUP_I_SHIFT 10
#define INVSQ_LOOKUP_I_MASK 1023
static const long INVSQ_LOOKUP_I[64+1]={
           92682l,   91966l,   91267l,   90583l,
           89915l,   89261l,   88621l,   87995l,
           87381l,   86781l,   86192l,   85616l,
           85051l,   84497l,   83953l,   83420l,
           82897l,   82384l,   81880l,   81385l,
           80899l,   80422l,   79953l,   79492l,
           79039l,   78594l,   78156l,   77726l,
           77302l,   76885l,   76475l,   76072l,
           75674l,   75283l,   74898l,   74519l,
           74146l,   73778l,   73415l,   73058l,
           72706l,   72359l,   72016l,   71679l,
           71347l,   71019l,   70695l,   70376l,
           70061l,   69750l,   69444l,   69141l,
           68842l,   68548l,   68256l,   67969l,
           67685l,   67405l,   67128l,   66855l,
           66585l,   66318l,   66054l,   65794l,
           65536l,
};

#define COS_LOOKUP_I_SHIFT 9
#define COS_LOOKUP_I_MASK 511
#define COS_LOOKUP_I_SZ 128
static const long COS_LOOKUP_I[COS_LOOKUP_I_SZ+1]={
           16384l,   16379l,   16364l,   16340l,
           16305l,   16261l,   16207l,   16143l,
           16069l,   15986l,   15893l,   15791l,
           15679l,   15557l,   15426l,   15286l,
           15137l,   14978l,   14811l,   14635l,
           14449l,   14256l,   14053l,   13842l,
           13623l,   13395l,   13160l,   12916l,
           12665l,   12406l,   12140l,   11866l,
           11585l,   11297l,   11003l,   10702l,
           10394l,   10080l,    9760l,    9434l,
            9102l,    8765l,    8423l,    8076l,
            7723l,    7366l,    7005l,    6639l,
            6270l,    5897l,    5520l,    5139l,
            4756l,    4370l,    3981l,    3590l,
            3196l,    2801l,    2404l,    2006l,
            1606l,    1205l,     804l,     402l,
               0l,    -401l,    -803l,   -1204l,
           -1605l,   -2005l,   -2403l,   -2800l,
           -3195l,   -3589l,   -3980l,   -4369l,
           -4755l,   -5138l,   -5519l,   -5896l,
           -6269l,   -6638l,   -7004l,   -7365l,
           -7722l,   -8075l,   -8422l,   -8764l,
           -9101l,   -9433l,   -9759l,  -10079l,
          -10393l,  -10701l,  -11002l,  -11296l,
          -11584l,  -11865l,  -12139l,  -12405l,
          -12664l,  -12915l,  -13159l,  -13394l,
          -13622l,  -13841l,  -14052l,  -14255l,
          -14448l,  -14634l,  -14810l,  -14977l,
          -15136l,  -15285l,  -15425l,  -15556l,
          -15678l,  -15790l,  -15892l,  -15985l,
          -16068l,  -16142l,  -16206l,  -16260l,
          -16304l,  -16339l,  -16363l,  -16378l,
          -16383l,
};

#endif

#endif