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Updated HRTF to process in 240-sample blocks

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This commit is contained in:
Ken Cooke 2016-08-18 08:29:32 -07:00
parent f80304d68e
commit 46c94a938e
2 changed files with 31 additions and 33 deletions
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62
libraries/audio/src/AudioHRTF.cpp
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@ -31,38 +31,36 @@
// Valimaki, Laakso. "Elimination of Transients in Time-Varying Allpass Fractional Delay Filters"
//
static const float crossfadeTable[HRTF_BLOCK] = {
1.0000000000f, 1.0000000000f, 1.0000000000f, 1.0000000000f, 1.0000000000f, 0.9999611462f, 0.9998445910f, 0.9996503524f,
0.9993784606f, 0.9990289579f, 0.9986018986f, 0.9980973490f, 0.9975153877f, 0.9968561049f, 0.9961196033f, 0.9953059972f,
0.9944154131f, 0.9934479894f, 0.9924038765f, 0.9912832366f, 0.9900862439f, 0.9888130845f, 0.9874639561f, 0.9860390685f,
0.9845386431f, 0.9829629131f, 0.9813121235f, 0.9795865307f, 0.9777864029f, 0.9759120199f, 0.9739636731f, 0.9719416652f,
0.9698463104f, 0.9676779344f, 0.9654368743f, 0.9631234783f, 0.9607381059f, 0.9582811279f, 0.9557529262f, 0.9531538935f,
0.9504844340f, 0.9477449623f, 0.9449359044f, 0.9420576968f, 0.9391107867f, 0.9360956322f, 0.9330127019f, 0.9298624749f,
0.9266454408f, 0.9233620996f, 0.9200129616f, 0.9165985472f, 0.9131193872f, 0.9095760221f, 0.9059690029f, 0.9022988899f,
0.8985662536f, 0.8947716742f, 0.8909157412f, 0.8869990541f, 0.8830222216f, 0.8789858616f, 0.8748906015f, 0.8707370778f,
0.8665259359f, 0.8622578304f, 0.8579334246f, 0.8535533906f, 0.8491184090f, 0.8446291692f, 0.8400863689f, 0.8354907140f,
0.8308429188f, 0.8261437056f, 0.8213938048f, 0.8165939546f, 0.8117449009f, 0.8068473974f, 0.8019022052f, 0.7969100928f,
0.7918718361f, 0.7867882182f, 0.7816600290f, 0.7764880657f, 0.7712731319f, 0.7660160383f, 0.7607176017f, 0.7553786457f,
0.7500000000f, 0.7445825006f, 0.7391269893f, 0.7336343141f, 0.7281053287f, 0.7225408922f, 0.7169418696f, 0.7113091309f,
0.7056435516f, 0.6999460122f, 0.6942173981f, 0.6884585998f, 0.6826705122f, 0.6768540348f, 0.6710100717f, 0.6651395310f,
0.6592433251f, 0.6533223705f, 0.6473775872f, 0.6414098993f, 0.6354202341f, 0.6294095226f, 0.6233786988f, 0.6173287002f,
0.6112604670f, 0.6051749422f, 0.5990730716f, 0.5929558036f, 0.5868240888f, 0.5806788803f, 0.5745211331f, 0.5683518042f,
0.5621718523f, 0.5559822381f, 0.5497839233f, 0.5435778714f, 0.5373650468f, 0.5311464151f, 0.5249229428f, 0.5186955971f,
0.5124653459f, 0.5062331573f, 0.5000000000f, 0.4937668427f, 0.4875346541f, 0.4813044029f, 0.4750770572f, 0.4688535849f,
0.4626349532f, 0.4564221286f, 0.4502160767f, 0.4440177619f, 0.4378281477f, 0.4316481958f, 0.4254788669f, 0.4193211197f,
0.4131759112f, 0.4070441964f, 0.4009269284f, 0.3948250578f, 0.3887395330f, 0.3826712998f, 0.3766213012f, 0.3705904774f,
0.3645797659f, 0.3585901007f, 0.3526224128f, 0.3466776295f, 0.3407566749f, 0.3348604690f, 0.3289899283f, 0.3231459652f,
0.3173294878f, 0.3115414002f, 0.3057826019f, 0.3000539878f, 0.2943564484f, 0.2886908691f, 0.2830581304f, 0.2774591078f,
0.2718946713f, 0.2663656859f, 0.2608730107f, 0.2554174994f, 0.2500000000f, 0.2446213543f, 0.2392823983f, 0.2339839617f,
0.2287268681f, 0.2235119343f, 0.2183399710f, 0.2132117818f, 0.2081281639f, 0.2030899072f, 0.1980977948f, 0.1931526026f,
0.1882550991f, 0.1834060454f, 0.1786061952f, 0.1738562944f, 0.1691570812f, 0.1645092860f, 0.1599136311f, 0.1553708308f,
0.1508815910f, 0.1464466094f, 0.1420665754f, 0.1377421696f, 0.1334740641f, 0.1292629222f, 0.1251093985f, 0.1210141384f,
0.1169777784f, 0.1130009459f, 0.1090842588f, 0.1052283258f, 0.1014337464f, 0.0977011101f, 0.0940309971f, 0.0904239779f,
0.0868806128f, 0.0834014528f, 0.0799870384f, 0.0766379004f, 0.0733545592f, 0.0701375251f, 0.0669872981f, 0.0639043678f,
0.0608892133f, 0.0579423032f, 0.0550640956f, 0.0522550377f, 0.0495155660f, 0.0468461065f, 0.0442470738f, 0.0417188721f,
0.0392618941f, 0.0368765217f, 0.0345631257f, 0.0323220656f, 0.0301536896f, 0.0280583348f, 0.0260363269f, 0.0240879801f,
0.0222135971f, 0.0204134693f, 0.0186878765f, 0.0170370869f, 0.0154613569f, 0.0139609315f, 0.0125360439f, 0.0111869155f,
0.0099137561f, 0.0087167634f, 0.0075961235f, 0.0065520106f, 0.0055845869f, 0.0046940028f, 0.0038803967f, 0.0031438951f,
0.0024846123f, 0.0019026510f, 0.0013981014f, 0.0009710421f, 0.0006215394f, 0.0003496476f, 0.0001554090f, 0.0000388538f,
1.0000000000f, 1.0000000000f, 1.0000000000f, 1.0000000000f, 1.0000000000f, 1.0000000000f, 1.0000000000f, 1.0000000000f,
0.9999545513f, 0.9998182135f, 0.9995910114f, 0.9992729863f, 0.9988641959f, 0.9983647147f, 0.9977746334f, 0.9970940592f,
0.9963231160f, 0.9954619438f, 0.9945106993f, 0.9934695553f, 0.9923387012f, 0.9911183425f, 0.9898087010f, 0.9884100149f,
0.9869225384f, 0.9853465419f, 0.9836823120f, 0.9819301512f, 0.9800903780f, 0.9781633270f, 0.9761493483f, 0.9740488082f,
0.9718620885f, 0.9695895868f, 0.9672317161f, 0.9647889052f, 0.9622615981f, 0.9596502542f, 0.9569553484f, 0.9541773705f,
0.9513168255f, 0.9483742335f, 0.9453501294f, 0.9422450630f, 0.9390595988f, 0.9357943158f, 0.9324498078f, 0.9290266826f,
0.9255255626f, 0.9219470843f, 0.9182918983f, 0.9145606690f, 0.9107540747f, 0.9068728075f, 0.9029175730f, 0.8988890902f,
0.8947880914f, 0.8906153223f, 0.8863715413f, 0.8820575200f, 0.8776740426f, 0.8732219061f, 0.8687019198f, 0.8641149055f,
0.8594616970f, 0.8547431402f, 0.8499600930f, 0.8451134248f, 0.8402040169f, 0.8352327617f, 0.8302005629f, 0.8251083354f,
0.8199570049f, 0.8147475079f, 0.8094807915f, 0.8041578130f, 0.7987795403f, 0.7933469510f, 0.7878610328f, 0.7823227830f,
0.7767332084f, 0.7710933251f, 0.7654041585f, 0.7596667428f, 0.7538821211f, 0.7480513449f, 0.7421754743f, 0.7362555775f,
0.7302927306f, 0.7242880178f, 0.7182425305f, 0.7121573680f, 0.7060336363f, 0.6998724488f, 0.6936749255f, 0.6874421931f,
0.6811753847f, 0.6748756396f, 0.6685441031f, 0.6621819261f, 0.6557902652f, 0.6493702826f, 0.6429231452f, 0.6364500251f,
0.6299520991f, 0.6234305485f, 0.6168865589f, 0.6103213199f, 0.6037360251f, 0.5971318716f, 0.5905100601f, 0.5838717943f,
0.5772182810f, 0.5705507299f, 0.5638703530f, 0.5571783649f, 0.5504759820f, 0.5437644228f, 0.5370449075f, 0.5303186576f,
0.5235868960f, 0.5168508463f, 0.5101117333f, 0.5033707820f, 0.4966292180f, 0.4898882667f, 0.4831491537f, 0.4764131040f,
0.4696813424f, 0.4629550925f, 0.4562355772f, 0.4495240180f, 0.4428216351f, 0.4361296470f, 0.4294492701f, 0.4227817190f,
0.4161282057f, 0.4094899399f, 0.4028681284f, 0.3962639749f, 0.3896786801f, 0.3831134411f, 0.3765694515f, 0.3700479009f,
0.3635499749f, 0.3570768548f, 0.3506297174f, 0.3442097348f, 0.3378180739f, 0.3314558969f, 0.3251243604f, 0.3188246153f,
0.3125578069f, 0.3063250745f, 0.3001275512f, 0.2939663637f, 0.2878426320f, 0.2817574695f, 0.2757119822f, 0.2697072694f,
0.2637444225f, 0.2578245257f, 0.2519486551f, 0.2461178789f, 0.2403332572f, 0.2345958415f, 0.2289066749f, 0.2232667916f,
0.2176772170f, 0.2121389672f, 0.2066530490f, 0.2012204597f, 0.1958421870f, 0.1905192085f, 0.1852524921f, 0.1800429951f,
0.1748916646f, 0.1697994371f, 0.1647672383f, 0.1597959831f, 0.1548865752f, 0.1500399070f, 0.1452568598f, 0.1405383030f,
0.1358850945f, 0.1312980802f, 0.1267780939f, 0.1223259574f, 0.1179424800f, 0.1136284587f, 0.1093846777f, 0.1052119086f,
0.1011109098f, 0.0970824270f, 0.0931271925f, 0.0892459253f, 0.0854393310f, 0.0817081017f, 0.0780529157f, 0.0744744374f,
0.0709733174f, 0.0675501922f, 0.0642056842f, 0.0609404012f, 0.0577549370f, 0.0546498706f, 0.0516257665f, 0.0486831745f,
0.0458226295f, 0.0430446516f, 0.0403497458f, 0.0377384019f, 0.0352110948f, 0.0327682839f, 0.0304104132f, 0.0281379115f,
0.0259511918f, 0.0238506517f, 0.0218366730f, 0.0199096220f, 0.0180698488f, 0.0163176880f, 0.0146534581f, 0.0130774616f,
0.0115899851f, 0.0101912990f, 0.0088816575f, 0.0076612988f, 0.0065304447f, 0.0054893007f, 0.0045380562f, 0.0036768840f,
0.0029059408f, 0.0022253666f, 0.0016352853f, 0.0011358041f, 0.0007270137f, 0.0004089886f, 0.0001817865f, 0.0000454487f,
};
//

2
libraries/audio/src/AudioHRTF.h
View file

@ -19,7 +19,7 @@ static const int HRTF_TAPS = 64; // minimum-phase FIR coefficients
static const int HRTF_TABLES = 25; // number of HRTF subjects
static const int HRTF_DELAY = 24; // max ITD in samples (1.0ms at 24KHz)
static const int HRTF_BLOCK = 256; // block processing size
static const int HRTF_BLOCK = 240; // block processing size
static const float HRTF_GAIN = 1.0f; // HRTF global gain adjustment