/*---------------------------------------------------------------------------*
  Project:  NintendoWare
  File:     snd_Util.cpp

  Copyright (C)2009-2010 Nintendo Co., Ltd./HAL Laboratory, Inc.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Revision: 23894 $
 *---------------------------------------------------------------------------*/

#include "precompiled.h"
#include <nw/snd/snd_Util.h>

#include <nw/ut/ut_Inlines.h>
#include <nw/snd/snd_SoundArchive.h>
#include <nw/snd/snd_SoundArchivePlayer.h>
#include <nw/snd/snd_WaveArchiveFileReader.h>

namespace nw {
namespace snd {
namespace internal {

namespace {

const int OCTAVE_DIVISION            = 12;
const int VOLUME_TABLE_SIZE          = Util::VOLUME_DB_MAX - Util::VOLUME_DB_MIN + 1;

#if 0
const f32 PAN_CURVE_MIN = 0.71f;
f32 s_PanCurveMax = 1.0f; // PAN_CURVE_MIN;
#endif

const f32 SURROUND_MODE_PAN_CURVE_MAX = 0.8f;

//  ピッチスケールテーブル ( 半音単位 )
const f32 NoteTable[ OCTAVE_DIVISION ] =
{
    1.00000000000000f,
    1.05946309435930f,
    1.12246204830937f,
    1.18920711500272f,
    1.25992104989487f,
    1.33483985417003f,
    1.41421356237310f,
    1.49830707687668f,
    1.58740105196820f,
    1.68179283050743f,
    1.78179743628068f,
    1.88774862536339f
};
//  ピッチスケールテーブル ( 半音の 1/256 単位 )

const f32 PitchTable[ Util::PITCH_DIVISION_RANGE ] =
{
    1.00000000000000f, 1.00022565930507f, 1.00045136953226f, 1.00067713069307f,
    1.00090294279898f, 1.00112880586149f, 1.00135471989211f, 1.00158068490233f,
    1.00180670090365f, 1.00203276790759f, 1.00225888592566f, 1.00248505496936f,
    1.00271127505020f, 1.00293754617972f, 1.00316386836942f, 1.00339024163082f,
    1.00361666597546f, 1.00384314141486f, 1.00406966796055f, 1.00429624562407f,
    1.00452287441694f, 1.00474955435071f, 1.00497628543691f, 1.00520306768709f,
    1.00542990111280f, 1.00565678572558f, 1.00588372153699f, 1.00611070855857f,
    1.00633774680189f, 1.00656483627850f, 1.00679197699996f, 1.00701916897784f,
    1.00724641222370f, 1.00747370674912f, 1.00770105256566f, 1.00792844968490f,
    1.00815589811842f, 1.00838339787779f, 1.00861094897460f, 1.00883855142043f,
    1.00906620522687f, 1.00929391040551f, 1.00952166696794f, 1.00974947492577f,
    1.00997733429057f, 1.01020524507396f, 1.01043320728755f, 1.01066122094292f,
    1.01088928605170f, 1.01111740262549f, 1.01134557067591f, 1.01157379021458f,
    1.01180206125310f, 1.01203038380312f, 1.01225875787623f, 1.01248718348409f,
    1.01271566063830f, 1.01294418935052f, 1.01317276963236f, 1.01340140149547f,
    1.01363008495149f, 1.01385882001206f, 1.01408760668882f, 1.01431644499343f,
    1.01454533493752f, 1.01477427653277f, 1.01500326979081f, 1.01523231472332f,
    1.01546141134194f, 1.01569055965835f, 1.01591975968421f, 1.01614901143119f,
    1.01637831491095f, 1.01660767013518f, 1.01683707711556f, 1.01706653586375f,
    1.01729604639144f, 1.01752560871032f, 1.01775522283207f, 1.01798488876839f,
    1.01821460653096f, 1.01844437613148f, 1.01867419758165f, 1.01890407089317f,
    1.01913399607774f, 1.01936397314707f, 1.01959400211286f, 1.01982408298683f,
    1.02005421578069f, 1.02028440050616f, 1.02051463717495f, 1.02074492579879f,
    1.02097526638940f, 1.02120565895850f, 1.02143610351784f, 1.02166660007913f,
    1.02189714865412f, 1.02212774925453f, 1.02235840189212f, 1.02258910657863f,
    1.02281986332579f, 1.02305067214536f, 1.02328153304909f, 1.02351244604873f,
    1.02374341115603f, 1.02397442838276f, 1.02420549774068f, 1.02443661924155f,
    1.02466779289714f, 1.02489901871921f, 1.02513029671954f, 1.02536162690990f,
    1.02559300930208f, 1.02582444390784f, 1.02605593073898f, 1.02628746980727f,
    1.02651906112451f, 1.02675070470248f, 1.02698240055299f, 1.02721414868781f,
    1.02744594911876f, 1.02767780185764f, 1.02790970691624f, 1.02814166430638f,
    1.02837367403986f, 1.02860573612850f, 1.02883785058410f, 1.02907001741849f,
    1.02930223664349f, 1.02953450827092f, 1.02976683231260f, 1.02999920878037f,
    1.03023163768604f, 1.03046411904146f, 1.03069665285846f, 1.03092923914889f,
    1.03116187792457f, 1.03139456919736f, 1.03162731297909f, 1.03186010928163f,
    1.03209295811682f, 1.03232585949652f, 1.03255881343258f, 1.03279181993686f,
    1.03302487902123f, 1.03325799069755f, 1.03349115497769f, 1.03372437187351f,
    1.03395764139691f, 1.03419096355973f, 1.03442433837388f, 1.03465776585123f,
    1.03489124600365f, 1.03512477884305f, 1.03535836438130f, 1.03559200263031f,
    1.03582569360196f, 1.03605943730815f, 1.03629323376078f, 1.03652708297176f,
    1.03676098495299f, 1.03699493971638f, 1.03722894727384f, 1.03746300763728f,
    1.03769712081862f, 1.03793128682977f, 1.03816550568267f, 1.03839977738923f,
    1.03863410196138f, 1.03886847941105f, 1.03910290975017f, 1.03933739299068f,
    1.03957192914452f, 1.03980651822362f, 1.04004116023993f, 1.04027585520539f,
    1.04051060313196f, 1.04074540403158f, 1.04098025791621f, 1.04121516479780f,
    1.04145012468832f, 1.04168513759972f, 1.04192020354397f, 1.04215532253304f,
    1.04239049457890f, 1.04262571969352f, 1.04286099788887f, 1.04309632917694f,
    1.04333171356970f, 1.04356715107914f, 1.04380264171725f, 1.04403818549601f,
    1.04427378242741f, 1.04450943252346f, 1.04474513579614f, 1.04498089225746f,
    1.04521670191942f, 1.04545256479402f, 1.04568848089328f, 1.04592445022919f,
    1.04616047281379f, 1.04639654865907f, 1.04663267777707f, 1.04686886017980f,
    1.04710509587929f, 1.04734138488756f, 1.04757772721665f, 1.04781412287858f,
    1.04805057188539f, 1.04828707424912f, 1.04852362998181f, 1.04876023909550f,
    1.04899690160224f, 1.04923361751407f, 1.04947038684306f, 1.04970720960124f,
    1.04994408580069f, 1.05018101545345f, 1.05041799857160f, 1.05065503516719f,
    1.05089212525229f, 1.05112926883898f, 1.05136646593932f, 1.05160371656540f,
    1.05184102072929f, 1.05207837844307f, 1.05231578971883f, 1.05255325456865f,
    1.05279077300463f, 1.05302834503885f, 1.05326597068341f, 1.05350364995040f,
    1.05374138285194f, 1.05397916940012f, 1.05421700960704f, 1.05445490348482f,
    1.05469285104557f, 1.05493085230140f, 1.05516890726443f, 1.05540701594677f,
    1.05564517836056f, 1.05588339451791f, 1.05612166443095f, 1.05635998811181f,
    1.05659836557263f, 1.05683679682555f, 1.05707528188269f, 1.05731382075621f,
    1.05755241345824f, 1.05779106000093f, 1.05802976039644f, 1.05826851465692f,
    1.05850732279451f, 1.05874618482139f, 1.05898510074970f, 1.05922407059161f
};

const f32 Decibel2RatioTable[ VOLUME_TABLE_SIZE ] =
{
                  0.000000000f, 3.05492E-05f, 3.09030E-05f, 3.12608E-05f, // -90.4dB = -infinity
    3.16228E-05f, 3.19890E-05f, 3.23594E-05f, 3.27341E-05f, 3.31131E-05f, // -90.0dB
    3.34965E-05f, 3.38844E-05f, 3.42768E-05f, 3.46737E-05f, 3.50752E-05f,
    3.54813E-05f, 3.58922E-05f, 3.63078E-05f, 3.67282E-05f, 3.71535E-05f,
    3.75837E-05f, 3.80189E-05f, 3.84592E-05f, 3.89045E-05f, 3.93550E-05f,
    3.98107E-05f, 4.02717E-05f, 4.07380E-05f, 4.12098E-05f, 4.16869E-05f,
    4.21697E-05f, 4.26580E-05f, 4.31519E-05f, 4.36516E-05f, 4.41570E-05f,
    4.46684E-05f, 4.51856E-05f, 4.57088E-05f, 4.62381E-05f, 4.67735E-05f,
    4.73151E-05f, 4.78630E-05f, 4.84172E-05f, 4.89779E-05f, 4.95450E-05f,
    5.01187E-05f, 5.06991E-05f, 5.12861E-05f, 5.18800E-05f, 5.24807E-05f,
    5.30884E-05f, 5.37032E-05f, 5.43250E-05f, 5.49541E-05f, 5.55904E-05f,
    5.62341E-05f, 5.68853E-05f, 5.75440E-05f, 5.82103E-05f, 5.88844E-05f,
    5.95662E-05f, 6.02560E-05f, 6.09537E-05f, 6.16595E-05f, 6.23735E-05f,
    6.30957E-05f, 6.38263E-05f, 6.45654E-05f, 6.53131E-05f, 6.60693E-05f, // -84.0dB
    6.68344E-05f, 6.76083E-05f, 6.83912E-05f, 6.91831E-05f, 6.99842E-05f,
    7.07946E-05f, 7.16143E-05f, 7.24436E-05f, 7.32825E-05f, 7.41310E-05f,
    7.49894E-05f, 7.58578E-05f, 7.67361E-05f, 7.76247E-05f, 7.85236E-05f,
    7.94328E-05f, 8.03526E-05f, 8.12831E-05f, 8.22243E-05f, 8.31764E-05f,
    8.41395E-05f, 8.51138E-05f, 8.60994E-05f, 8.70964E-05f, 8.81049E-05f,
    8.91251E-05f, 9.01571E-05f, 9.12011E-05f, 9.22571E-05f, 9.33254E-05f,
    9.44061E-05f, 9.54993E-05f, 9.66051E-05f, 9.77237E-05f, 9.88553E-05f,
    0.000100000f, 0.000101158f, 0.000102329f, 0.000103514f, 0.000104713f, // -80.0dB
    0.000105925f, 0.000107152f, 0.000108393f, 0.000109648f, 0.000110917f,
    0.000112202f, 0.000113501f, 0.000114815f, 0.000116145f, 0.000117490f,
    0.000118850f, 0.000120226f, 0.000121619f, 0.000123027f, 0.000124451f,
    0.000125893f, 0.000127350f, 0.000128825f, 0.000130317f, 0.000131826f, // -78.0dB
    0.000133352f, 0.000134896f, 0.000136458f, 0.000138038f, 0.000139637f,
    0.000141254f, 0.000142889f, 0.000144544f, 0.000146218f, 0.000147911f,
    0.000149624f, 0.000151356f, 0.000153109f, 0.000154882f, 0.000156675f,
    0.000158489f, 0.000160325f, 0.000162181f, 0.000164059f, 0.000165959f,
    0.000167880f, 0.000169824f, 0.000171791f, 0.000173780f, 0.000175792f,
    0.000177828f, 0.000179887f, 0.000181970f, 0.000184077f, 0.000186209f,
    0.000188365f, 0.000190546f, 0.000192752f, 0.000194984f, 0.000197242f,
    0.000199526f, 0.000201837f, 0.000204174f, 0.000206538f, 0.000208930f,
    0.000211349f, 0.000213796f, 0.000216272f, 0.000218776f, 0.000221309f,
    0.000223872f, 0.000226464f, 0.000229087f, 0.000231739f, 0.000234423f,
    0.000237137f, 0.000239883f, 0.000242661f, 0.000245471f, 0.000248313f,
    0.000251189f, 0.000254097f, 0.000257040f, 0.000260016f, 0.000263027f, // -72.0dB
    0.000266073f, 0.000269153f, 0.000272270f, 0.000275423f, 0.000278612f,
    0.000281838f, 0.000285102f, 0.000288403f, 0.000291743f, 0.000295121f,
    0.000298538f, 0.000301995f, 0.000305492f, 0.000309030f, 0.000312608f,
    0.000316228f, 0.000319890f, 0.000323594f, 0.000327341f, 0.000331131f,
    0.000334965f, 0.000338844f, 0.000342768f, 0.000346737f, 0.000350752f,
    0.000354813f, 0.000358922f, 0.000363078f, 0.000367282f, 0.000371535f,
    0.000375837f, 0.000380189f, 0.000384592f, 0.000389045f, 0.000393550f,
    0.000398107f, 0.000402717f, 0.000407380f, 0.000412098f, 0.000416869f,
    0.000421697f, 0.000426580f, 0.000431519f, 0.000436516f, 0.000441570f,
    0.000446684f, 0.000451856f, 0.000457088f, 0.000462381f, 0.000467735f,
    0.000473151f, 0.000478630f, 0.000484172f, 0.000489779f, 0.000495450f,
    0.000501187f, 0.000506991f, 0.000512861f, 0.000518800f, 0.000524807f, // -66.0dB
    0.000530884f, 0.000537032f, 0.000543250f, 0.000549541f, 0.000555904f,
    0.000562341f, 0.000568853f, 0.000575440f, 0.000582103f, 0.000588844f,
    0.000595662f, 0.000602560f, 0.000609537f, 0.000616595f, 0.000623735f,
    0.000630957f, 0.000638263f, 0.000645654f, 0.000653131f, 0.000660693f,
    0.000668344f, 0.000676083f, 0.000683912f, 0.000691831f, 0.000699842f,
    0.000707946f, 0.000716143f, 0.000724436f, 0.000732825f, 0.000741310f,
    0.000749894f, 0.000758578f, 0.000767361f, 0.000776247f, 0.000785236f,
    0.000794328f, 0.000803526f, 0.000812831f, 0.000822243f, 0.000831764f,
    0.000841395f, 0.000851138f, 0.000860994f, 0.000870964f, 0.000881049f,
    0.000891251f, 0.000901571f, 0.000912011f, 0.000922571f, 0.000933254f,
    0.000944061f, 0.000954993f, 0.000966051f, 0.000977237f, 0.000988553f,
    0.001000000f, 0.001011579f, 0.001023293f, 0.001035142f, 0.001047129f, // -60.0dB ( 1/1000 )
    0.001059254f, 0.001071519f, 0.001083927f, 0.001096478f, 0.001109175f,
    0.001122018f, 0.001135011f, 0.001148154f, 0.001161449f, 0.001174898f,
    0.001188502f, 0.001202264f, 0.001216186f, 0.001230269f, 0.001244515f,
    0.001258925f, 0.001273503f, 0.001288250f, 0.001303167f, 0.001318257f,
    0.001333521f, 0.001348963f, 0.001364583f, 0.001380384f, 0.001396368f,
    0.001412538f, 0.001428894f, 0.001445440f, 0.001462177f, 0.001479108f,
    0.001496236f, 0.001513561f, 0.001531087f, 0.001548817f, 0.001566751f,
    0.001584893f, 0.001603245f, 0.001621810f, 0.001640590f, 0.001659587f,
    0.001678804f, 0.001698244f, 0.001717908f, 0.001737801f, 0.001757924f,
    0.001778279f, 0.001798871f, 0.001819701f, 0.001840772f, 0.001862087f,
    0.001883649f, 0.001905461f, 0.001927525f, 0.001949845f, 0.001972423f,
    0.001995262f, 0.002018366f, 0.002041738f, 0.002065380f, 0.002089296f, // -54.0dB
    0.002113489f, 0.002137962f, 0.002162719f, 0.002187762f, 0.002213095f,
    0.002238721f, 0.002264644f, 0.002290868f, 0.002317395f, 0.002344229f,
    0.002371374f, 0.002398833f, 0.002426610f, 0.002454709f, 0.002483133f,
    0.002511886f, 0.002540973f, 0.002570396f, 0.002600160f, 0.002630268f,
    0.002660725f, 0.002691535f, 0.002722701f, 0.002754229f, 0.002786121f,
    0.002818383f, 0.002851018f, 0.002884032f, 0.002917427f, 0.002951209f,
    0.002985383f, 0.003019952f, 0.003054921f, 0.003090295f, 0.003126079f,
    0.003162278f, 0.003198895f, 0.003235937f, 0.003273407f, 0.003311311f,
    0.003349654f, 0.003388442f, 0.003427678f, 0.003467369f, 0.003507519f,
    0.003548134f, 0.003589219f, 0.003630781f, 0.003672823f, 0.003715352f,
    0.003758374f, 0.003801894f, 0.003845918f, 0.003890451f, 0.003935501f,
    0.003981072f, 0.004027170f, 0.004073803f, 0.004120975f, 0.004168694f, // -48.0dB
    0.004216965f, 0.004265795f, 0.004315191f, 0.004365158f, 0.004415704f,
    0.004466836f, 0.004518559f, 0.004570882f, 0.004623810f, 0.004677351f,
    0.004731513f, 0.004786301f, 0.004841724f, 0.004897788f, 0.004954502f,
    0.005011872f, 0.005069907f, 0.005128614f, 0.005188000f, 0.005248075f,
    0.005308844f, 0.005370318f, 0.005432503f, 0.005495409f, 0.005559043f,
    0.005623413f, 0.005688529f, 0.005754399f, 0.005821032f, 0.005888437f,
    0.005956621f, 0.006025596f, 0.006095369f, 0.006165950f, 0.006237348f,
    0.006309573f, 0.006382635f, 0.006456542f, 0.006531306f, 0.006606934f,
    0.006683439f, 0.006760830f, 0.006839116f, 0.006918310f, 0.006998420f,
    0.007079458f, 0.007161434f, 0.007244360f, 0.007328245f, 0.007413102f,
    0.007498942f, 0.007585776f, 0.007673615f, 0.007762471f, 0.007852356f,
    0.007943282f, 0.008035261f, 0.008128305f, 0.008222426f, 0.008317638f, // -42.0dB
    0.008413951f, 0.008511380f, 0.008609938f, 0.008709636f, 0.008810489f,
    0.008912509f, 0.009015711f, 0.009120108f, 0.009225714f, 0.009332543f,
    0.009440609f, 0.009549926f, 0.009660509f, 0.009772372f, 0.009885531f,
    0.010000000f, 0.010115795f, 0.010232930f, 0.010351422f, 0.010471285f, // -40.0dB ( 1/100 )
    0.010592537f, 0.010715193f, 0.010839269f, 0.010964782f, 0.011091748f,
    0.011220185f, 0.011350108f, 0.011481536f, 0.011614486f, 0.011748976f,
    0.011885022f, 0.012022644f, 0.012161860f, 0.012302688f, 0.012445146f,
    0.012589254f, 0.012735031f, 0.012882496f, 0.013031668f, 0.013182567f,
    0.013335214f, 0.013489629f, 0.013645831f, 0.013803843f, 0.013963684f,
    0.014125375f, 0.014288940f, 0.014454398f, 0.014621772f, 0.014791084f,
    0.014962357f, 0.015135612f, 0.015310875f, 0.015488166f, 0.015667511f,
    0.015848932f, 0.016032454f, 0.016218101f, 0.016405898f, 0.016595869f, // -36.0dB
    0.016788040f, 0.016982437f, 0.017179084f, 0.017378008f, 0.017579236f,
    0.017782794f, 0.017988709f, 0.018197009f, 0.018407720f, 0.018620871f,
    0.018836491f, 0.019054607f, 0.019275249f, 0.019498446f, 0.019724227f,
    0.019952623f, 0.020183664f, 0.020417379f, 0.020653802f, 0.020892961f,
    0.021134890f, 0.021379621f, 0.021627185f, 0.021877616f, 0.022130947f,
    0.022387211f, 0.022646443f, 0.022908677f, 0.023173946f, 0.023442288f,
    0.023713737f, 0.023988329f, 0.024266101f, 0.024547089f, 0.024831331f,
    0.025118864f, 0.025409727f, 0.025703958f, 0.026001596f, 0.026302680f,
    0.026607251f, 0.026915348f, 0.027227013f, 0.027542287f, 0.027861212f,
    0.028183829f, 0.028510183f, 0.028840315f, 0.029174270f, 0.029512092f,
    0.029853826f, 0.030199517f, 0.030549211f, 0.030902954f, 0.031260794f,
    0.031622777f, 0.031988951f, 0.032359366f, 0.032734069f, 0.033113112f, // -30.0dB
    0.033496544f, 0.033884416f, 0.034276779f, 0.034673685f, 0.035075187f,
    0.035481339f, 0.035892193f, 0.036307805f, 0.036728230f, 0.037153523f,
    0.037583740f, 0.038018940f, 0.038459178f, 0.038904514f, 0.039355008f,
    0.039810717f, 0.040271703f, 0.040738028f, 0.041209752f, 0.041686938f,
    0.042169650f, 0.042657952f, 0.043151908f, 0.043651583f, 0.044157045f,
    0.044668359f, 0.045185594f, 0.045708819f, 0.046238102f, 0.046773514f,
    0.047315126f, 0.047863009f, 0.048417237f, 0.048977882f, 0.049545019f,
    0.050118723f, 0.050699071f, 0.051286138f, 0.051880004f, 0.052480746f,
    0.053088444f, 0.053703180f, 0.054325033f, 0.054954087f, 0.055590426f,
    0.056234133f, 0.056885293f, 0.057543994f, 0.058210322f, 0.058884366f,
    0.059566214f, 0.060255959f, 0.060953690f, 0.061659500f, 0.062373484f,
    0.063095734f, 0.063826349f, 0.064565423f, 0.065313055f, 0.066069345f, // -24.0dB
    0.066834392f, 0.067608298f, 0.068391165f, 0.069183097f, 0.069984200f,
    0.070794578f, 0.071614341f, 0.072443596f, 0.073282453f, 0.074131024f,
    0.074989421f, 0.075857758f, 0.076736149f, 0.077624712f, 0.078523563f,
    0.079432823f, 0.080352612f, 0.081283052f, 0.082224265f, 0.083176377f,
    0.084139514f, 0.085113804f, 0.086099375f, 0.087096359f, 0.088104887f,
    0.089125094f, 0.090157114f, 0.091201084f, 0.092257143f, 0.093325430f,
    0.094406088f, 0.095499259f, 0.096605088f, 0.097723722f, 0.098855309f,
    0.100000000f, 0.101157945f, 0.102329299f, 0.103514217f, 0.104712855f, // -20.0dB ( 1/10 )
    0.105925373f, 0.107151931f, 0.108392691f, 0.109647820f, 0.110917482f,
    0.112201845f, 0.113501082f, 0.114815362f, 0.116144861f, 0.117489755f,
    0.118850223f, 0.120226443f, 0.121618600f, 0.123026877f, 0.124451461f,
    0.125892541f, 0.127350308f, 0.128824955f, 0.130316678f, 0.131825674f, // -18.0dB
    0.133352143f, 0.134896288f, 0.136458314f, 0.138038426f, 0.139636836f,
    0.141253754f, 0.142889396f, 0.144543977f, 0.146217717f, 0.147910839f,
    0.149623566f, 0.151356125f, 0.153108746f, 0.154881662f, 0.156675107f,
    0.158489319f, 0.160324539f, 0.162181010f, 0.164058977f, 0.165958691f,
    0.167880402f, 0.169824365f, 0.171790839f, 0.173780083f, 0.175792361f,
    0.177827941f, 0.179887092f, 0.181970086f, 0.184077200f, 0.186208714f,
    0.188364909f, 0.190546072f, 0.192752491f, 0.194984460f, 0.197242274f,
    0.199526231f, 0.201836636f, 0.204173794f, 0.206538016f, 0.208929613f,
    0.211348904f, 0.213796209f, 0.216271852f, 0.218776162f, 0.221309471f,
    0.223872114f, 0.226464431f, 0.229086765f, 0.231739465f, 0.234422882f,
    0.237137371f, 0.239883292f, 0.242661010f, 0.245470892f, 0.248313311f,
    0.251188643f, 0.254097271f, 0.257039578f, 0.260015956f, 0.263026799f, // -12.0dB ( 1/4 )
    0.266072506f, 0.269153480f, 0.272270131f, 0.275422870f, 0.278612117f,
    0.281838293f, 0.285101827f, 0.288403150f, 0.291742701f, 0.295120923f,
    0.298538262f, 0.301995172f, 0.305492111f, 0.309029543f, 0.312607937f,
    0.316227766f, 0.319889511f, 0.323593657f, 0.327340695f, 0.331131121f,
    0.334965439f, 0.338844156f, 0.342767787f, 0.346736850f, 0.350751874f,
    0.354813389f, 0.358921935f, 0.363078055f, 0.367282300f, 0.371535229f,
    0.375837404f, 0.380189396f, 0.384591782f, 0.389045145f, 0.393550075f,
    0.398107171f, 0.402717034f, 0.407380278f, 0.412097519f, 0.416869383f,
    0.421696503f, 0.426579519f, 0.431519077f, 0.436515832f, 0.441570447f,
    0.446683592f, 0.451855944f, 0.457088190f, 0.462381021f, 0.467735141f,
    0.473151259f, 0.478630092f, 0.484172368f, 0.489778819f, 0.495450191f,
    0.501187234f, 0.506990708f, 0.512861384f, 0.518800039f, 0.524807460f, //  -6.0dB ( 1/2 )
    0.530884444f, 0.537031796f, 0.543250331f, 0.549540874f, 0.555904257f,
    0.562341325f, 0.568852931f, 0.575439937f, 0.582103218f, 0.588843655f,
    0.595662144f, 0.602559586f, 0.609536897f, 0.616595002f, 0.623734835f,
    0.630957344f, 0.638263486f, 0.645654229f, 0.653130553f, 0.660693448f,
    0.668343918f, 0.676082975f, 0.683911647f, 0.691830971f, 0.699841996f,
    0.707945784f, 0.716143410f, 0.724435960f, 0.732824533f, 0.741310241f,
    0.749894209f, 0.758577575f, 0.767361489f, 0.776247117f, 0.785235635f,
    0.794328235f, 0.803526122f, 0.812830516f, 0.822242650f, 0.831763771f, //  -2.0dB
    0.841395142f, 0.851138038f, 0.860993752f, 0.870963590f, 0.881048873f,
    0.891250938f, 0.901571138f, 0.912010839f, 0.922571427f, 0.933254301f, //  -1.0dB
    0.944060876f, 0.954992586f, 0.966050879f, 0.977237221f, 0.988553095f,
    1.000000000f, 1.011579454f, 1.023292992f, 1.035142167f, 1.047128548f, //   0.0dB
    1.059253725f, 1.071519305f, 1.083926914f, 1.096478196f, 1.109174815f,
    1.122018454f, 1.135010816f, 1.148153621f, 1.161448614f, 1.174897555f, //   1.0dB
    1.188502227f, 1.202264435f, 1.216186001f, 1.230268771f, 1.244514612f,
    1.258925412f, 1.273503081f, 1.288249552f, 1.303166778f, 1.318256739f, //   2.0dB
    1.333521432f, 1.348962883f, 1.364583137f, 1.380384265f, 1.396368361f,
    1.412537545f, 1.428893959f, 1.445439771f, 1.462177174f, 1.479108388f,
    1.496235656f, 1.513561248f, 1.531087462f, 1.548816619f, 1.566751070f,
    1.584893192f, 1.603245391f, 1.621810097f, 1.640589773f, 1.659586907f,
    1.678804018f, 1.698243652f, 1.717908387f, 1.737800829f, 1.757923614f,
    1.778279410f, 1.798870915f, 1.819700859f, 1.840772001f, 1.862087137f,
    1.883649089f, 1.905460718f, 1.927524913f, 1.949844600f, 1.972422736f,
    1.995262315f                                                          //   6.0dB ( *2 )
};

const int PAN_TABLE_MAX              = 256;
const int PAN_TABLE_MIN              = 0;
const int PAN_TABLE_CENTER           = 128;
const int PAN_TABLE_SIZE             = PAN_TABLE_MAX - PAN_TABLE_MIN + 1;

const f32 Pan2RatioTableSqrt[ PAN_TABLE_SIZE ] =
{
    1.000000000f, 0.998044964f, 0.996086091f, 0.994123358f, 0.992156742f, 0.990186220f, 0.988211769f, 0.986233365f,
    0.984250984f, 0.982264603f, 0.980274196f, 0.978279740f, 0.976281209f, 0.974278579f, 0.972271824f, 0.970260919f,
    0.968245837f, 0.966226552f, 0.964203039f, 0.962175270f, 0.960143218f, 0.958106857f, 0.956066159f, 0.954021095f,
    0.951971638f, 0.949917760f, 0.947859431f, 0.945796622f, 0.943729304f, 0.941657448f, 0.939581024f, 0.937500000f,
    0.935414347f, 0.933324033f, 0.931229027f, 0.929129297f, 0.927024811f, 0.924915537f, 0.922801441f, 0.920682491f,
    0.918558654f, 0.916429894f, 0.914296177f, 0.912157470f, 0.910013736f, 0.907864940f, 0.905711047f, 0.903552018f,
    0.901387819f, 0.899218411f, 0.897043756f, 0.894863816f, 0.892678554f, 0.890487928f, 0.888291900f, 0.886090430f,
    0.883883476f, 0.881670999f, 0.879452955f, 0.877229303f, 0.875000000f, 0.872765003f, 0.870524267f, 0.868277749f,
    0.866025404f, 0.863767185f, 0.861503047f, 0.859232943f, 0.856956825f, 0.854674646f, 0.852386356f, 0.850091907f,
    0.847791248f, 0.845484329f, 0.843171098f, 0.840851503f, 0.838525492f, 0.836193010f, 0.833854004f, 0.831508418f,
    0.829156198f, 0.826797285f, 0.824431622f, 0.822059152f, 0.819679816f, 0.817293552f, 0.814900301f, 0.812500000f,
    0.810092587f, 0.807677999f, 0.805256170f, 0.802827036f, 0.800390530f, 0.797946583f, 0.795495129f, 0.793036096f,
    0.790569415f, 0.788095013f, 0.785612818f, 0.783122755f, 0.780624750f, 0.778118725f, 0.775604603f, 0.773082305f,
    0.770551750f, 0.768012858f, 0.765465545f, 0.762909726f, 0.760345316f, 0.757772228f, 0.755190373f, 0.752599661f,
    0.750000000f, 0.747391296f, 0.744773455f, 0.742146380f, 0.739509973f, 0.736864133f, 0.734208758f, 0.731543744f,
    0.728868987f, 0.726184377f, 0.723489806f, 0.720785162f, 0.718070331f, 0.715345196f, 0.712609641f, 0.709863543f,
    0.707106781f, 0.704339229f, 0.701560760f, 0.698771243f, 0.695970545f, 0.693158532f, 0.690335064f, 0.687500000f, // center(-3dB)
    0.684653197f, 0.681794507f, 0.678923781f, 0.676040864f, 0.673145601f, 0.670237831f, 0.667317391f, 0.664384113f,
    0.661437828f, 0.658478360f, 0.655505530f, 0.652519157f, 0.649519053f, 0.646505027f, 0.643476884f, 0.640434423f,
    0.637377439f, 0.634305723f, 0.631219059f, 0.628117226f, 0.625000000f, 0.621867148f, 0.618718434f, 0.615553613f,
    0.612372436f, 0.609174647f, 0.605959982f, 0.602728173f, 0.599478940f, 0.596212001f, 0.592927061f, 0.589623821f,
    0.586301970f, 0.582961191f, 0.579601156f, 0.576221529f, 0.572821962f, 0.569402099f, 0.565961571f, 0.562500000f,
    0.559016994f, 0.555512151f, 0.551985054f, 0.548435274f, 0.544862368f, 0.541265877f, 0.537645329f, 0.534000234f,
    0.530330086f, 0.526634361f, 0.522912517f, 0.519163991f, 0.515388203f, 0.511584548f, 0.507752400f, 0.503891109f,
    0.500000000f, 0.496078371f, 0.492125492f, 0.488140605f, 0.484122918f, 0.480071609f, 0.475985819f, 0.471864652f,
    0.467707173f, 0.463512405f, 0.459279327f, 0.455006868f, 0.450693909f, 0.446339277f, 0.441941738f, 0.437500000f,
    0.433012702f, 0.428478413f, 0.423895624f, 0.419262746f, 0.414578099f, 0.409839908f, 0.405046294f, 0.400195265f,
    0.395284708f, 0.390312375f, 0.385275875f, 0.380172658f, 0.375000000f, 0.369754986f, 0.364434493f, 0.359035165f,
    0.353553391f, 0.347985273f, 0.342326598f, 0.336572800f, 0.330718914f, 0.324759526f, 0.318688720f, 0.312500000f,
    0.306186218f, 0.299739470f, 0.293150985f, 0.286410981f, 0.279508497f, 0.272431184f, 0.265165043f, 0.257694102f,
    0.250000000f, 0.242061459f, 0.233853587f, 0.225346955f, 0.216506351f, 0.207289049f, 0.197642354f, 0.187500000f,
    0.176776695f, 0.165359457f, 0.153093109f, 0.139754249f, 0.125000000f, 0.108253175f, 0.088388348f, 0.062500000f,
    0.000000000f
};
const f32 Pan2RatioTableSqrtSurround[ PAN_TABLE_SIZE ] =
{
    0.800000000f, 0.799274272f, 0.798548543f, 0.797822815f, 0.797097087f, 0.796371359f, 0.795645630f, 0.794919902f,
    0.794194174f, 0.793468446f, 0.792742717f, 0.792016989f, 0.791291261f, 0.790565532f, 0.789839804f, 0.789114076f,
    0.788388348f, 0.787662619f, 0.786936891f, 0.786211163f, 0.785485435f, 0.784759706f, 0.784033978f, 0.783308250f,
    0.782582521f, 0.781856793f, 0.781131065f, 0.780405337f, 0.779679608f, 0.778953880f, 0.778228152f, 0.777502424f,
    0.776776695f, 0.776050967f, 0.775325239f, 0.774599510f, 0.773873782f, 0.773148054f, 0.772422326f, 0.771696597f,
    0.770970869f, 0.770245141f, 0.769519413f, 0.768793684f, 0.768067956f, 0.767342228f, 0.766616499f, 0.765890771f,
    0.765165043f, 0.764439315f, 0.763713586f, 0.762987858f, 0.762262130f, 0.761536402f, 0.760810673f, 0.760084945f,
    0.759359217f, 0.758633488f, 0.757907760f, 0.757182032f, 0.756456304f, 0.755730575f, 0.755004847f, 0.754279119f,
    0.753553391f, 0.752827662f, 0.752101934f, 0.751376206f, 0.750650477f, 0.749924749f, 0.749199021f, 0.748473293f,
    0.747747564f, 0.747021836f, 0.746296108f, 0.745570379f, 0.744844651f, 0.744118923f, 0.743393195f, 0.742667466f,
    0.741941738f, 0.741216010f, 0.740490282f, 0.739764553f, 0.739038825f, 0.738313097f, 0.737587368f, 0.736861640f,
    0.736135912f, 0.735410184f, 0.734684455f, 0.733958727f, 0.733232999f, 0.732507271f, 0.731781542f, 0.731055814f,
    0.730330086f, 0.729604357f, 0.728878629f, 0.728152901f, 0.727427173f, 0.726701444f, 0.725975716f, 0.725249988f,
    0.724524260f, 0.723798531f, 0.723072803f, 0.722347075f, 0.721621346f, 0.720895618f, 0.720169890f, 0.719444162f,
    0.718718433f, 0.717992705f, 0.717266977f, 0.716541249f, 0.715815520f, 0.715089792f, 0.714364064f, 0.713638335f,
    0.712912607f, 0.712186879f, 0.711461151f, 0.710735422f, 0.710009694f, 0.709283966f, 0.708558238f, 0.707832509f,
    0.707106781f, 0.704339229f, 0.701560760f, 0.698771243f, 0.695970545f, 0.693158532f, 0.690335064f, 0.687500000f, // center(-3dB)
    0.684653197f, 0.681794507f, 0.678923781f, 0.676040864f, 0.673145601f, 0.670237831f, 0.667317391f, 0.664384113f,
    0.661437828f, 0.658478360f, 0.655505530f, 0.652519157f, 0.649519053f, 0.646505027f, 0.643476884f, 0.640434423f,
    0.637377439f, 0.634305723f, 0.631219059f, 0.628117226f, 0.625000000f, 0.621867148f, 0.618718434f, 0.615553613f,
    0.612372436f, 0.609174647f, 0.605959982f, 0.602728173f, 0.599478940f, 0.596212001f, 0.592927061f, 0.589623821f,
    0.586301970f, 0.582961191f, 0.579601156f, 0.576221529f, 0.572821962f, 0.569402099f, 0.565961571f, 0.562500000f,
    0.559016994f, 0.555512151f, 0.551985054f, 0.548435274f, 0.544862368f, 0.541265877f, 0.537645329f, 0.534000234f,
    0.530330086f, 0.526634361f, 0.522912517f, 0.519163991f, 0.515388203f, 0.511584548f, 0.507752400f, 0.503891109f,
    0.500000000f, 0.496078371f, 0.492125492f, 0.488140605f, 0.484122918f, 0.480071609f, 0.475985819f, 0.471864652f,
    0.467707173f, 0.463512405f, 0.459279327f, 0.455006868f, 0.450693909f, 0.446339277f, 0.441941738f, 0.437500000f,
    0.433012702f, 0.428478413f, 0.423895624f, 0.419262746f, 0.414578099f, 0.409839908f, 0.405046294f, 0.400195265f,
    0.395284708f, 0.390312375f, 0.385275875f, 0.380172658f, 0.375000000f, 0.369754986f, 0.364434493f, 0.359035165f,
    0.353553391f, 0.347985273f, 0.342326598f, 0.336572800f, 0.330718914f, 0.324759526f, 0.318688720f, 0.312500000f,
    0.306186218f, 0.299739470f, 0.293150985f, 0.286410981f, 0.279508497f, 0.272431184f, 0.265165043f, 0.257694102f,
    0.250000000f, 0.242061459f, 0.233853587f, 0.225346955f, 0.216506351f, 0.207289049f, 0.197642354f, 0.187500000f,
    0.176776695f, 0.165359457f, 0.153093109f, 0.139754249f, 0.125000000f, 0.108253175f, 0.088388348f, 0.062500000f,
    0.000000000f
};

const f32 Pan2RatioTableSinCos[ PAN_TABLE_SIZE ] =
{
    1.000000000f, 0.999981175f, 0.999924702f, 0.999830582f, 0.999698819f, 0.999529418f, 0.999322385f, 0.999077728f,
    0.998795456f, 0.998475581f, 0.998118113f, 0.997723067f, 0.997290457f, 0.996820299f, 0.996312612f, 0.995767414f,
    0.995184727f, 0.994564571f, 0.993906970f, 0.993211949f, 0.992479535f, 0.991709754f, 0.990902635f, 0.990058210f,
    0.989176510f, 0.988257568f, 0.987301418f, 0.986308097f, 0.985277642f, 0.984210092f, 0.983105487f, 0.981963869f,
    0.980785280f, 0.979569766f, 0.978317371f, 0.977028143f, 0.975702130f, 0.974339383f, 0.972939952f, 0.971503891f,
    0.970031253f, 0.968522094f, 0.966976471f, 0.965394442f, 0.963776066f, 0.962121404f, 0.960430519f, 0.958703475f,
    0.956940336f, 0.955141168f, 0.953306040f, 0.951435021f, 0.949528181f, 0.947585591f, 0.945607325f, 0.943593458f,
    0.941544065f, 0.939459224f, 0.937339012f, 0.935183510f, 0.932992799f, 0.930766961f, 0.928506080f, 0.926210242f,
    0.923879533f, 0.921514039f, 0.919113852f, 0.916679060f, 0.914209756f, 0.911706032f, 0.909167983f, 0.906595705f,
    0.903989293f, 0.901348847f, 0.898674466f, 0.895966250f, 0.893224301f, 0.890448723f, 0.887639620f, 0.884797098f,
    0.881921264f, 0.879012226f, 0.876070094f, 0.873094978f, 0.870086991f, 0.867046246f, 0.863972856f, 0.860866939f,
    0.857728610f, 0.854557988f, 0.851355193f, 0.848120345f, 0.844853565f, 0.841554977f, 0.838224706f, 0.834862875f,
    0.831469612f, 0.828045045f, 0.824589303f, 0.821102515f, 0.817584813f, 0.814036330f, 0.810457198f, 0.806847554f,
    0.803207531f, 0.799537269f, 0.795836905f, 0.792106577f, 0.788346428f, 0.784556597f, 0.780737229f, 0.776888466f,
    0.773010453f, 0.769103338f, 0.765167266f, 0.761202385f, 0.757208847f, 0.753186799f, 0.749136395f, 0.745057785f,
    0.740951125f, 0.736816569f, 0.732654272f, 0.728464390f, 0.724247083f, 0.720002508f, 0.715730825f, 0.711432196f,
    0.707106781f, 0.702754744f, 0.698376249f, 0.693971461f, 0.689540545f, 0.685083668f, 0.680600998f, 0.676092704f, // center(-3dB)
    0.671558955f, 0.666999922f, 0.662415778f, 0.657806693f, 0.653172843f, 0.648514401f, 0.643831543f, 0.639124445f,
    0.634393284f, 0.629638239f, 0.624859488f, 0.620057212f, 0.615231591f, 0.610382806f, 0.605511041f, 0.600616479f,
    0.595699304f, 0.590759702f, 0.585797857f, 0.580813958f, 0.575808191f, 0.570780746f, 0.565731811f, 0.560661576f,
    0.555570233f, 0.550457973f, 0.545324988f, 0.540171473f, 0.534997620f, 0.529803625f, 0.524589683f, 0.519355990f,
    0.514102744f, 0.508830143f, 0.503538384f, 0.498227667f, 0.492898192f, 0.487550160f, 0.482183772f, 0.476799230f,
    0.471396737f, 0.465976496f, 0.460538711f, 0.455083587f, 0.449611330f, 0.444122145f, 0.438616239f, 0.433093819f,
    0.427555093f, 0.422000271f, 0.416429560f, 0.410843171f, 0.405241314f, 0.399624200f, 0.393992040f, 0.388345047f,
    0.382683432f, 0.377007410f, 0.371317194f, 0.365612998f, 0.359895037f, 0.354163525f, 0.348418680f, 0.342660717f,
    0.336889853f, 0.331106306f, 0.325310292f, 0.319502031f, 0.313681740f, 0.307849640f, 0.302005949f, 0.296150888f,
    0.290284677f, 0.284407537f, 0.278519689f, 0.272621355f, 0.266712757f, 0.260794118f, 0.254865660f, 0.248927606f,
    0.242980180f, 0.237023606f, 0.231058108f, 0.225083911f, 0.219101240f, 0.213110320f, 0.207111376f, 0.201104635f,
    0.195090322f, 0.189068664f, 0.183039888f, 0.177004220f, 0.170961889f, 0.164913120f, 0.158858143f, 0.152797185f,
    0.146730474f, 0.140658239f, 0.134580709f, 0.128498111f, 0.122410675f, 0.116318631f, 0.110222207f, 0.104121634f,
    0.098017140f, 0.091908956f, 0.085797312f, 0.079682438f, 0.073564564f, 0.067443920f, 0.061320736f, 0.055195244f,
    0.049067674f, 0.042938257f, 0.036807223f, 0.030674803f, 0.024541229f, 0.018406730f, 0.012271538f, 0.006135885f,
    0.000000000f
};
const f32 Pan2RatioTableSinCosSurround[ PAN_TABLE_SIZE ] =
{
    0.800000000f, 0.799274272f, 0.798548543f, 0.797822815f, 0.797097087f, 0.796371359f, 0.795645630f, 0.794919902f,
    0.794194174f, 0.793468446f, 0.792742717f, 0.792016989f, 0.791291261f, 0.790565532f, 0.789839804f, 0.789114076f,
    0.788388348f, 0.787662619f, 0.786936891f, 0.786211163f, 0.785485435f, 0.784759706f, 0.784033978f, 0.783308250f,
    0.782582521f, 0.781856793f, 0.781131065f, 0.780405337f, 0.779679608f, 0.778953880f, 0.778228152f, 0.777502424f,
    0.776776695f, 0.776050967f, 0.775325239f, 0.774599510f, 0.773873782f, 0.773148054f, 0.772422326f, 0.771696597f,
    0.770970869f, 0.770245141f, 0.769519413f, 0.768793684f, 0.768067956f, 0.767342228f, 0.766616499f, 0.765890771f,
    0.765165043f, 0.764439315f, 0.763713586f, 0.762987858f, 0.762262130f, 0.761536402f, 0.760810673f, 0.760084945f,
    0.759359217f, 0.758633488f, 0.757907760f, 0.757182032f, 0.756456304f, 0.755730575f, 0.755004847f, 0.754279119f,
    0.753553391f, 0.752827662f, 0.752101934f, 0.751376206f, 0.750650477f, 0.749924749f, 0.749199021f, 0.748473293f,
    0.747747564f, 0.747021836f, 0.746296108f, 0.745570379f, 0.744844651f, 0.744118923f, 0.743393195f, 0.742667466f,
    0.741941738f, 0.741216010f, 0.740490282f, 0.739764553f, 0.739038825f, 0.738313097f, 0.737587368f, 0.736861640f,
    0.736135912f, 0.735410184f, 0.734684455f, 0.733958727f, 0.733232999f, 0.732507271f, 0.731781542f, 0.731055814f,
    0.730330086f, 0.729604357f, 0.728878629f, 0.728152901f, 0.727427173f, 0.726701444f, 0.725975716f, 0.725249988f,
    0.724524260f, 0.723798531f, 0.723072803f, 0.722347075f, 0.721621346f, 0.720895618f, 0.720169890f, 0.719444162f,
    0.718718433f, 0.717992705f, 0.717266977f, 0.716541249f, 0.715815520f, 0.715089792f, 0.714364064f, 0.713638335f,
    0.712912607f, 0.712186879f, 0.711461151f, 0.710735422f, 0.710009694f, 0.709283966f, 0.708558238f, 0.707832509f,
    0.707106781f, 0.702754744f, 0.698376249f, 0.693971461f, 0.689540545f, 0.685083668f, 0.680600998f, 0.676092704f, // center(-3dB)
    0.671558955f, 0.666999922f, 0.662415778f, 0.657806693f, 0.653172843f, 0.648514401f, 0.643831543f, 0.639124445f,
    0.634393284f, 0.629638239f, 0.624859488f, 0.620057212f, 0.615231591f, 0.610382806f, 0.605511041f, 0.600616479f,
    0.595699304f, 0.590759702f, 0.585797857f, 0.580813958f, 0.575808191f, 0.570780746f, 0.565731811f, 0.560661576f,
    0.555570233f, 0.550457973f, 0.545324988f, 0.540171473f, 0.534997620f, 0.529803625f, 0.524589683f, 0.519355990f,
    0.514102744f, 0.508830143f, 0.503538384f, 0.498227667f, 0.492898192f, 0.487550160f, 0.482183772f, 0.476799230f,
    0.471396737f, 0.465976496f, 0.460538711f, 0.455083587f, 0.449611330f, 0.444122145f, 0.438616239f, 0.433093819f,
    0.427555093f, 0.422000271f, 0.416429560f, 0.410843171f, 0.405241314f, 0.399624200f, 0.393992040f, 0.388345047f,
    0.382683432f, 0.377007410f, 0.371317194f, 0.365612998f, 0.359895037f, 0.354163525f, 0.348418680f, 0.342660717f,
    0.336889853f, 0.331106306f, 0.325310292f, 0.319502031f, 0.313681740f, 0.307849640f, 0.302005949f, 0.296150888f,
    0.290284677f, 0.284407537f, 0.278519689f, 0.272621355f, 0.266712757f, 0.260794118f, 0.254865660f, 0.248927606f,
    0.242980180f, 0.237023606f, 0.231058108f, 0.225083911f, 0.219101240f, 0.213110320f, 0.207111376f, 0.201104635f,
    0.195090322f, 0.189068664f, 0.183039888f, 0.177004220f, 0.170961889f, 0.164913120f, 0.158858143f, 0.152797185f,
    0.146730474f, 0.140658239f, 0.134580709f, 0.128498111f, 0.122410675f, 0.116318631f, 0.110222207f, 0.104121634f,
    0.098017140f, 0.091908956f, 0.085797312f, 0.079682438f, 0.073564564f, 0.067443920f, 0.061320736f, 0.055195244f,
    0.049067674f, 0.042938257f, 0.036807223f, 0.030674803f, 0.024541229f, 0.018406730f, 0.012271538f, 0.006135885f,
    0.000000000f
};

const f32 Pan2RatioTableLinear[ PAN_TABLE_SIZE ] =
{
    1.000000000f, 0.996093750f, 0.992187500f, 0.988281250f, 0.984375000f, 0.980468750f, 0.976562500f, 0.972656250f,
    0.968750000f, 0.964843750f, 0.960937500f, 0.957031250f, 0.953125000f, 0.949218750f, 0.945312500f, 0.941406250f,
    0.937500000f, 0.933593750f, 0.929687500f, 0.925781250f, 0.921875000f, 0.917968750f, 0.914062500f, 0.910156250f,
    0.906250000f, 0.902343750f, 0.898437500f, 0.894531250f, 0.890625000f, 0.886718750f, 0.882812500f, 0.878906250f,
    0.875000000f, 0.871093750f, 0.867187500f, 0.863281250f, 0.859375000f, 0.855468750f, 0.851562500f, 0.847656250f,
    0.843750000f, 0.839843750f, 0.835937500f, 0.832031250f, 0.828125000f, 0.824218750f, 0.820312500f, 0.816406250f,
    0.812500000f, 0.808593750f, 0.804687500f, 0.800781250f, 0.796875000f, 0.792968750f, 0.789062500f, 0.785156250f,
    0.781250000f, 0.777343750f, 0.773437500f, 0.769531250f, 0.765625000f, 0.761718750f, 0.757812500f, 0.753906250f,
    0.750000000f, 0.746093750f, 0.742187500f, 0.738281250f, 0.734375000f, 0.730468750f, 0.726562500f, 0.722656250f,
    0.718750000f, 0.714843750f, 0.710937500f, 0.707031250f, 0.703125000f, 0.699218750f, 0.695312500f, 0.691406250f,
    0.687500000f, 0.683593750f, 0.679687500f, 0.675781250f, 0.671875000f, 0.667968750f, 0.664062500f, 0.660156250f,
    0.656250000f, 0.652343750f, 0.648437500f, 0.644531250f, 0.640625000f, 0.636718750f, 0.632812500f, 0.628906250f,
    0.625000000f, 0.621093750f, 0.617187500f, 0.613281250f, 0.609375000f, 0.605468750f, 0.601562500f, 0.597656250f,
    0.593750000f, 0.589843750f, 0.585937500f, 0.582031250f, 0.578125000f, 0.574218750f, 0.570312500f, 0.566406250f,
    0.562500000f, 0.558593750f, 0.554687500f, 0.550781250f, 0.546875000f, 0.542968750f, 0.539062500f, 0.535156250f,
    0.531250000f, 0.527343750f, 0.523437500f, 0.519531250f, 0.515625000f, 0.511718750f, 0.507812500f, 0.503906250f,
    0.500000000f, 0.496093750f, 0.492187500f, 0.488281250f, 0.484375000f, 0.480468750f, 0.476562500f, 0.472656250f, // center(-6dB)
    0.468750000f, 0.464843750f, 0.460937500f, 0.457031250f, 0.453125000f, 0.449218750f, 0.445312500f, 0.441406250f,
    0.437500000f, 0.433593750f, 0.429687500f, 0.425781250f, 0.421875000f, 0.417968750f, 0.414062500f, 0.410156250f,
    0.406250000f, 0.402343750f, 0.398437500f, 0.394531250f, 0.390625000f, 0.386718750f, 0.382812500f, 0.378906250f,
    0.375000000f, 0.371093750f, 0.367187500f, 0.363281250f, 0.359375000f, 0.355468750f, 0.351562500f, 0.347656250f,
    0.343750000f, 0.339843750f, 0.335937500f, 0.332031250f, 0.328125000f, 0.324218750f, 0.320312500f, 0.316406250f,
    0.312500000f, 0.308593750f, 0.304687500f, 0.300781250f, 0.296875000f, 0.292968750f, 0.289062500f, 0.285156250f,
    0.281250000f, 0.277343750f, 0.273437500f, 0.269531250f, 0.265625000f, 0.261718750f, 0.257812500f, 0.253906250f,
    0.250000000f, 0.246093750f, 0.242187500f, 0.238281250f, 0.234375000f, 0.230468750f, 0.226562500f, 0.222656250f,
    0.218750000f, 0.214843750f, 0.210937500f, 0.207031250f, 0.203125000f, 0.199218750f, 0.195312500f, 0.191406250f,
    0.187500000f, 0.183593750f, 0.179687500f, 0.175781250f, 0.171875000f, 0.167968750f, 0.164062500f, 0.160156250f,
    0.156250000f, 0.152343750f, 0.148437500f, 0.144531250f, 0.140625000f, 0.136718750f, 0.132812500f, 0.128906250f,
    0.125000000f, 0.121093750f, 0.117187500f, 0.113281250f, 0.109375000f, 0.105468750f, 0.101562500f, 0.097656250f,
    0.093750000f, 0.089843750f, 0.085937500f, 0.082031250f, 0.078125000f, 0.074218750f, 0.070312500f, 0.066406250f,
    0.062500000f, 0.058593750f, 0.054687500f, 0.050781250f, 0.046875000f, 0.042968750f, 0.039062500f, 0.035156250f,
    0.031250000f, 0.027343750f, 0.023437500f, 0.019531250f, 0.015625000f, 0.011718750f, 0.007812500f, 0.003906250f,
    0.000000000f
};
const f32 Pan2RatioTableLinearSurround[ PAN_TABLE_SIZE ] =
{
    0.800000000f, 0.797656250f, 0.795312500f, 0.792968750f, 0.790625000f, 0.788281250f, 0.785937500f, 0.783593750f, 
    0.781250000f, 0.778906250f, 0.776562500f, 0.774218750f, 0.771875000f, 0.769531250f, 0.767187500f, 0.764843750f, 
    0.762500000f, 0.760156250f, 0.757812500f, 0.755468750f, 0.753125000f, 0.750781250f, 0.748437500f, 0.746093750f, 
    0.743750000f, 0.741406250f, 0.739062500f, 0.736718750f, 0.734375000f, 0.732031250f, 0.729687500f, 0.727343750f, 
    0.725000000f, 0.722656250f, 0.720312500f, 0.717968750f, 0.715625000f, 0.713281250f, 0.710937500f, 0.708593750f, 
    0.706250000f, 0.703906250f, 0.701562500f, 0.699218750f, 0.696875000f, 0.694531250f, 0.692187500f, 0.689843750f, 
    0.687500000f, 0.685156250f, 0.682812500f, 0.680468750f, 0.678125000f, 0.675781250f, 0.673437500f, 0.671093750f, 
    0.668750000f, 0.666406250f, 0.664062500f, 0.661718750f, 0.659375000f, 0.657031250f, 0.654687500f, 0.652343750f, 
    0.650000000f, 0.647656250f, 0.645312500f, 0.642968750f, 0.640625000f, 0.638281250f, 0.635937500f, 0.633593750f, 
    0.631250000f, 0.628906250f, 0.626562500f, 0.624218750f, 0.621875000f, 0.619531250f, 0.617187500f, 0.614843750f, 
    0.612500000f, 0.610156250f, 0.607812500f, 0.605468750f, 0.603125000f, 0.600781250f, 0.598437500f, 0.596093750f, 
    0.593750000f, 0.591406250f, 0.589062500f, 0.586718750f, 0.584375000f, 0.582031250f, 0.579687500f, 0.577343750f, 
    0.575000000f, 0.572656250f, 0.570312500f, 0.567968750f, 0.565625000f, 0.563281250f, 0.560937500f, 0.558593750f, 
    0.556250000f, 0.553906250f, 0.551562500f, 0.549218750f, 0.546875000f, 0.544531250f, 0.542187500f, 0.539843750f, 
    0.537500000f, 0.535156250f, 0.532812500f, 0.530468750f, 0.528125000f, 0.525781250f, 0.523437500f, 0.521093750f, 
    0.518750000f, 0.516406250f, 0.514062500f, 0.511718750f, 0.509375000f, 0.507031250f, 0.504687500f, 0.502343750f, 
    0.500000000f, 0.496093750f, 0.492187500f, 0.488281250f, 0.484375000f, 0.480468750f, 0.476562500f, 0.472656250f, // center(-6dB)
    0.468750000f, 0.464843750f, 0.460937500f, 0.457031250f, 0.453125000f, 0.449218750f, 0.445312500f, 0.441406250f,
    0.437500000f, 0.433593750f, 0.429687500f, 0.425781250f, 0.421875000f, 0.417968750f, 0.414062500f, 0.410156250f,
    0.406250000f, 0.402343750f, 0.398437500f, 0.394531250f, 0.390625000f, 0.386718750f, 0.382812500f, 0.378906250f,
    0.375000000f, 0.371093750f, 0.367187500f, 0.363281250f, 0.359375000f, 0.355468750f, 0.351562500f, 0.347656250f,
    0.343750000f, 0.339843750f, 0.335937500f, 0.332031250f, 0.328125000f, 0.324218750f, 0.320312500f, 0.316406250f,
    0.312500000f, 0.308593750f, 0.304687500f, 0.300781250f, 0.296875000f, 0.292968750f, 0.289062500f, 0.285156250f,
    0.281250000f, 0.277343750f, 0.273437500f, 0.269531250f, 0.265625000f, 0.261718750f, 0.257812500f, 0.253906250f,
    0.250000000f, 0.246093750f, 0.242187500f, 0.238281250f, 0.234375000f, 0.230468750f, 0.226562500f, 0.222656250f,
    0.218750000f, 0.214843750f, 0.210937500f, 0.207031250f, 0.203125000f, 0.199218750f, 0.195312500f, 0.191406250f,
    0.187500000f, 0.183593750f, 0.179687500f, 0.175781250f, 0.171875000f, 0.167968750f, 0.164062500f, 0.160156250f,
    0.156250000f, 0.152343750f, 0.148437500f, 0.144531250f, 0.140625000f, 0.136718750f, 0.132812500f, 0.128906250f,
    0.125000000f, 0.121093750f, 0.117187500f, 0.113281250f, 0.109375000f, 0.105468750f, 0.101562500f, 0.097656250f,
    0.093750000f, 0.089843750f, 0.085937500f, 0.082031250f, 0.078125000f, 0.074218750f, 0.070312500f, 0.066406250f,
    0.062500000f, 0.058593750f, 0.054687500f, 0.050781250f, 0.046875000f, 0.042968750f, 0.039062500f, 0.035156250f,
    0.031250000f, 0.027343750f, 0.023437500f, 0.019531250f, 0.015625000f, 0.011718750f, 0.007812500f, 0.003906250f,
    0.000000000f
};

const int PAN_CURVE_NUM = 3;
const f32* PanTableTable[ PAN_CURVE_NUM ] =
{
    Pan2RatioTableSqrt,
    Pan2RatioTableSinCos,
    Pan2RatioTableLinear
};
const f32* PanTableTableForSurround[ PAN_CURVE_NUM ] =
{
    Pan2RatioTableSqrtSurround,
    Pan2RatioTableSinCosSurround,
    Pan2RatioTableLinearSurround
};

// CalcTick 用
#ifdef NW_PLATFORM_CTR
class TickCalculator
{
private:
    static const int LOG_BUF_SIZE = 20;

    nn::os::Tick m_Ticks[ LOG_BUF_SIZE ];
    nn::os::Tick m_TmpTick;
    int m_Counter;

public:
    TickCalculator() : m_Counter( 0 ) {}

    void Calc()
    {
        nn::os::Tick tick2 = nn::os::Tick::GetSystemCurrent();
        m_Ticks[ m_Counter ] = ( tick2 - m_TmpTick );
        m_TmpTick = tick2;

        m_Counter += 1;
        if ( m_Counter == LOG_BUF_SIZE )
        {
            char str[300]; str[0] = '\0';
            for ( int i = 0; i < LOG_BUF_SIZE; i++ )
            {
                std::snprintf( str, 300, "%s [%2lld]",
                        str, m_Ticks[i].ToTimeSpan().GetMilliSeconds() );
            }
            NN_LOG("%s\n", str );
            m_Counter = 0;
        }
    }
};
TickCalculator s_TickCalculator;
#endif

} // anonymous namespace



// CalcLpfFreq Table 80Hz - 16000Hz
//      - scale 値は scale = (0.1/3) * idx + 0.135614381 と見なす
//      - freq 値は RVL_SDK の axvpb.pb.lpf のカットオフ周波数を参考にした
const f32 Util::CALC_LPF_FREQ_INTERCEPT = 0.135614381f;
const u16 Util::CalcLpfFreqTable[ CALC_LPF_FREQ_TABLE_SIZE ] =
{
    // freq(Hz),   scale
       80,      // 0.135614381 == CALC_LPF_FREQ_INTERCEPT
      100,      // 0.167807191
      128,      // 0.203421572
      160,      // 0.235614381
      200,      // 0.267807191
      256,      // 0.303421572
      320,      // 0.335614381
      400,      // 0.367807191
      500,      // 0.400000000
      640,      // 0.435614381
      800,      // 0.467807191
     1000,      // 0.500000000
     1280,      // 0.535614381
     1600,      // 0.567807191
     2000,      // 0.600000000
     2560,      // 0.635614381
     3200,      // 0.667807191
     4000,      // 0.700000000
     5120,      // 0.735614381
     6400,      // 0.767807191
     8000,      // 0.800000000
    10240,      // 0.835614381
    12800,      // 0.867807191
    16000       // 0.900000000
};

u16 Util::CalcLpfFreq( f32 scale )
{
    scale = ut::Clamp( scale, 0.0f, 1.0f );

    u16 freq = 0;

    // freq = static_cast<u16>( std::pow( 2.0, ( scale-1.0 ) * 10.0 ) * 32000.0 );
    // のかわりにテーブルを使用する
    if ( scale < CALC_LPF_FREQ_INTERCEPT )
    {
        freq = CalcLpfFreqTable[0];
    }
    else if ( scale >= 0.9f )
    {
        freq = CalcLpfFreqTable[CALC_LPF_FREQ_TABLE_SIZE-1];
    }
    else
    {
        int idx = static_cast<int>( (scale-CALC_LPF_FREQ_INTERCEPT) / (0.1f/3) );
        freq = CalcLpfFreqTable[ idx ];
    }

    return freq;
}

#if 0
f32 Util::SetPanCurveMax( f32 max )
{
    if ( max > PAN_CURVE_MIN )
    {
        s_PanCurveMax = max;
    }
    else
    {
        s_PanCurveMax = PAN_CURVE_MIN;
    }
    return s_PanCurveMax;
}
f32 Util::GetPanCurveMax()
{
    return s_PanCurveMax;
}
f32 Util::GetPanCurveMin()
{
    return PAN_CURVE_MIN;
}
#endif


f32 Util::CalcPanRatio( f32 pan, const PanInfo& info )
{
    pan = ( ut::Clamp( pan, -1.0f, 1.0f ) + 1.0f ) / 2.0f; // 0.0 - 1.0 のスケールに

    const f32* table = NULL;
    if ( nw::snd::SoundSystem::GetOutputMode() == nw::snd::OUTPUT_MODE_SURROUND )
    {
        table = PanTableTableForSurround[ info.curve ];
    }
    else
    {
        table = PanTableTable[ info.curve ];
    }

    register f32 ratio = 0.0f;
    ratio = table[ static_cast<int>( pan * PAN_TABLE_MAX + 0.5f ) ];

    if ( info.centerZeroFlag )
    {
        ratio /= table[ PAN_TABLE_CENTER ]; // 中央で1.0倍になるようにする
    }

    if ( info.zeroClampFlag )
    {
        ratio = ut::Clamp( ratio, 0.0f, 1.0f );
    }
    else
    {
        ratio = ut::Clamp( ratio, 0.0f, 2.0f );
    }

    return ratio;
}

f32 Util::CalcSurroundPanRatio( f32 surroundPan, const PanInfo& info )
{
    surroundPan = ut::Clamp( surroundPan, 0.0f, 2.0f ) / 2.0f; // 0.0 - 1.0 のスケールに

    const f32* table = PanTableTable[ info.curve ];

    f32 ratio = table[ static_cast<int>( surroundPan * PAN_TABLE_MAX + 0.5f ) ];

    ratio = ut::Clamp( ratio, 0.0f, 2.0f );

    return ratio;
}
/*---------------------------------------------------------------------------*
  Name:         CalcPitchRatio

  Description:  セント単位系から倍率を求める

  Arguments:    pitch : original key からのピッチのずれ(分解能:半音の1/256)

  Returns:      ピッチ倍率
 *---------------------------------------------------------------------------*/
f32 Util::CalcPitchRatio( int pitch_ )
{
    static const int RANGE = PITCH_DIVISION_RANGE * OCTAVE_DIVISION;

    register int pitch = pitch_;
    
    register int octave = 0;
    while ( pitch < 0 )
    {
        octave--;
        pitch += RANGE;
    }
    while ( pitch >= RANGE )
    {
        octave++;
        pitch -= RANGE;
    }
    
    register int note = pitch / PITCH_DIVISION_RANGE;
    pitch -= note * PITCH_DIVISION_RANGE;
    
    register f32 ratio = 1.0f;
    while ( octave > 0 )
    {
        ratio *= 2.0f;
        octave--;
    }
    while ( octave < 0 )
    {
        ratio /= 2.0f;
        octave++;
    }

    if ( note  != 0 )
    {
        ratio *= NoteTable[note];
    }
    if ( pitch != 0 )
    {
        ratio *= PitchTable[pitch];
    }

    return ratio;
}

f32 Util::CalcVolumeRatio( f32 dB )
{
    dB = ut::Clamp( dB, -90.4f, 6.0f );
    int index = static_cast<int>( dB * 10 ) - VOLUME_DB_MIN;
    return Decibel2RatioTable[ index ];
}

u16 Util::CalcRandom()
{
    static u32 u = 0x12345678;
    u = u * 1664525 + 1013904223;
    return static_cast<u16>( u >> 16 );
}

// ID が waveArchiveId の波形アーカイブの waveIndex 番目の波形アドレスを返します。
// 未ロードの場合、NULL が返ります。
const void* Util::GetWaveFile(
    u32 waveArchiveId,
    u32 waveIndex,
    const SoundArchive& arc,
    const SoundArchivePlayer& player )
{
    // 波形アーカイブを取得
    SoundArchive::WaveArchiveInfo info;
    if ( ! arc.ReadWaveArchiveInfo( waveArchiveId, &info ) )
    {
        return NULL;    // ID == warcId の波形アーカイブ情報が見つからない
    }

    const void* warcFile = player.detail_GetFileAddress( info.fileId );
    NW_WARNING( warcFile, "warc(%d) is not loaded.", waveArchiveId );
    if ( warcFile == NULL )
    {
        return NULL;    // 波形アーカイブが未ロードだった
    }

    // 波形ファイルを取得
    internal::WaveArchiveFileReader reader( warcFile, info.isLoadIndividual );
    const void* waveFile = reader.GetWaveFile( waveIndex );
    // TODO: この waveFile を差し替えることができれば、任意の波形で
    //       ノートオンすることができる。
    NW_WARNING( waveFile, "index(%d) in warc(%d) is not loaded.", waveIndex, waveArchiveId );
    if ( waveFile == NULL )
    {
        return NULL;
    }
    return waveFile;
}

void Util::CalcTick()
{
#ifdef NW_PLATFORM_CTR
    s_TickCalculator.Calc();
#endif /* NW_PLATFORM_CTR */
}

unsigned long Util::GetSampleByByte( unsigned long byte, SampleFormat format )
{
    unsigned long samples = 0;
    unsigned long frac;

    switch ( format )
    {
    case SAMPLE_FORMAT_DSP_ADPCM:
        samples = ( byte / 8 ) * 14;
        frac = ( byte % 8 );
        if ( frac != 0 )
        {
            samples += ( frac - 1 ) * 2 ;
        }
        break;

    case SAMPLE_FORMAT_PCM_S8:
        samples = byte;
        break;

    /*
    case SAMPLE_FORMAT_PCM_S16_BE:
    case SAMPLE_FORMAT_PCM_S16_LE:
    */
    case SAMPLE_FORMAT_PCM_S16:
        samples = ( byte >> 1 );
        break;

    default:
        NW_ASSERTMSG( false, "Invalid format\n" );
        break;
    }

    return samples;
}

unsigned long Util::GetByteBySample( unsigned long samples, SampleFormat format )
{
    unsigned long byte = 0;
    unsigned long frac;

    switch ( format )
    {
    case SAMPLE_FORMAT_DSP_ADPCM:
        byte = ( samples / 14 ) * 8;
        frac = ( samples % 14 );
        if ( frac != 0 )
        {
            byte += ( ( frac + 1 ) >> 1 ) + 1;
        }
        break;
        
    case SAMPLE_FORMAT_PCM_S8:
        byte = samples;
        break;

    /*
    case SAMPLE_FORMAT_PCM_S16_BE:
    case SAMPLE_FORMAT_PCM_S16_LE:
    */
    case SAMPLE_FORMAT_PCM_S16:
        byte = ( samples << 1 );
        break;

    default:
        NW_ASSERTMSG( false, "Invalid format\n" );
        break;
    }
    
    return byte;
}

} // namespace nw::snd::internal
} // namespace nw::snd
} // namespace nw