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Use an icosahedron for 3D second-order

master
Chris Robinson 2022-09-01 10:32:38 -07:00
parent bf3f63fb4c
commit 02cf2bde7b
4 changed files with 62 additions and 66 deletions
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65
alc/panning.cpp
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@ -719,10 +719,13 @@ void InitHrtfPanning(ALCdevice *device)
constexpr float Deg_90{Deg180 / 2.0f /* 90 degrees*/};
constexpr float Deg_45{Deg_90 / 2.0f /* 45 degrees*/};
constexpr float Deg135{Deg_45 * 3.0f /*135 degrees*/};
constexpr float Deg_21{3.648638281e-01f /* 20~ 21 degrees*/};
constexpr float Deg_32{5.535743589e-01f /* 31~ 32 degrees*/};
constexpr float Deg_35{6.154797087e-01f /* 35~ 36 degrees*/};
constexpr float Deg_58{1.017221968e+00f /* 58~ 59 degrees*/};
constexpr float Deg_69{1.205932499e+00f /* 69~ 70 degrees*/};
constexpr float Deg111{1.935660155e+00f /*110~111 degrees*/};
constexpr float Deg_21{3.648638281e-01f /* 20~ 21 degrees*/};
constexpr float Deg122{2.124370686e+00f /*121~122 degrees*/};
static const AngularPoint AmbiPoints1O[]{
{ EvRadians{ Deg_35}, AzRadians{-Deg_45} },
{ EvRadians{ Deg_35}, AzRadians{-Deg135} },
@ -733,20 +736,18 @@ void InitHrtfPanning(ALCdevice *device)
{ EvRadians{-Deg_35}, AzRadians{ Deg_45} },
{ EvRadians{-Deg_35}, AzRadians{ Deg135} },
}, AmbiPoints2O[]{
{ EvRadians{ 0.0f}, AzRadians{ 0.0f} },
{ EvRadians{ 0.0f}, AzRadians{ Deg180} },
{ EvRadians{ 0.0f}, AzRadians{-Deg_90} },
{ EvRadians{ 0.0f}, AzRadians{ Deg_90} },
{ EvRadians{ Deg_90}, AzRadians{ 0.0f} },
{ EvRadians{-Deg_90}, AzRadians{ 0.0f} },
{ EvRadians{ Deg_35}, AzRadians{-Deg_45} },
{ EvRadians{ Deg_35}, AzRadians{-Deg135} },
{ EvRadians{ Deg_35}, AzRadians{ Deg_45} },
{ EvRadians{ Deg_35}, AzRadians{ Deg135} },
{ EvRadians{-Deg_35}, AzRadians{-Deg_45} },
{ EvRadians{-Deg_35}, AzRadians{-Deg135} },
{ EvRadians{-Deg_35}, AzRadians{ Deg_45} },
{ EvRadians{-Deg_35}, AzRadians{ Deg135} },
{ EvRadians{-Deg_32}, AzRadians{ 0.0f} },
{ EvRadians{ 0.0f}, AzRadians{ Deg_58} },
{ EvRadians{ Deg_58}, AzRadians{ Deg_90} },
{ EvRadians{ Deg_32}, AzRadians{ 0.0f} },
{ EvRadians{ 0.0f}, AzRadians{ Deg122} },
{ EvRadians{-Deg_58}, AzRadians{-Deg_90} },
{ EvRadians{-Deg_32}, AzRadians{ Deg180} },
{ EvRadians{ 0.0f}, AzRadians{-Deg122} },
{ EvRadians{ Deg_58}, AzRadians{-Deg_90} },
{ EvRadians{ Deg_32}, AzRadians{ Deg180} },
{ EvRadians{ 0.0f}, AzRadians{-Deg_58} },
{ EvRadians{-Deg_58}, AzRadians{ Deg_90} },
}, AmbiPoints3O[]{
{ EvRadians{ Deg_69}, AzRadians{-Deg_90} },
{ EvRadians{ Deg_69}, AzRadians{ Deg_90} },
@ -779,20 +780,18 @@ void InitHrtfPanning(ALCdevice *device)
{ 1.250000000e-01f, -1.250000000e-01f, -1.250000000e-01f, 1.250000000e-01f },
{ 1.250000000e-01f, -1.250000000e-01f, -1.250000000e-01f, -1.250000000e-01f },
}, AmbiMatrix2O[][MaxAmbiChannels]{
{ 7.142857143e-02f, 0.000000000e+00f, 0.000000000e+00f, 1.237179148e-01f, 0.000000000e+00f, 0.000000000e+00f, -7.453559925e-02f, 0.000000000e+00f, 1.290994449e-01f, },
{ 7.142857143e-02f, 0.000000000e+00f, 0.000000000e+00f, -1.237179148e-01f, 0.000000000e+00f, 0.000000000e+00f, -7.453559925e-02f, 0.000000000e+00f, 1.290994449e-01f, },
{ 7.142857143e-02f, 1.237179148e-01f, 0.000000000e+00f, 0.000000000e+00f, 0.000000000e+00f, 0.000000000e+00f, -7.453559925e-02f, 0.000000000e+00f, -1.290994449e-01f, },
{ 7.142857143e-02f, -1.237179148e-01f, 0.000000000e+00f, 0.000000000e+00f, 0.000000000e+00f, 0.000000000e+00f, -7.453559925e-02f, 0.000000000e+00f, -1.290994449e-01f, },
{ 7.142857143e-02f, 0.000000000e+00f, 1.237179148e-01f, 0.000000000e+00f, 0.000000000e+00f, 0.000000000e+00f, 1.490711985e-01f, 0.000000000e+00f, 0.000000000e+00f, },
{ 7.142857143e-02f, 0.000000000e+00f, -1.237179148e-01f, 0.000000000e+00f, 0.000000000e+00f, 0.000000000e+00f, 1.490711985e-01f, 0.000000000e+00f, 0.000000000e+00f, },
{ 7.142857143e-02f, 7.142857143e-02f, 7.142857143e-02f, 7.142857143e-02f, 9.682458366e-02f, 9.682458366e-02f, 0.000000000e+00f, 9.682458366e-02f, 0.000000000e+00f, },
{ 7.142857143e-02f, 7.142857143e-02f, 7.142857143e-02f, -7.142857143e-02f, -9.682458366e-02f, 9.682458366e-02f, 0.000000000e+00f, -9.682458366e-02f, 0.000000000e+00f, },
{ 7.142857143e-02f, -7.142857143e-02f, 7.142857143e-02f, 7.142857143e-02f, -9.682458366e-02f, -9.682458366e-02f, 0.000000000e+00f, 9.682458366e-02f, 0.000000000e+00f, },
{ 7.142857143e-02f, -7.142857143e-02f, 7.142857143e-02f, -7.142857143e-02f, 9.682458366e-02f, -9.682458366e-02f, 0.000000000e+00f, -9.682458366e-02f, 0.000000000e+00f, },
{ 7.142857143e-02f, 7.142857143e-02f, -7.142857143e-02f, 7.142857143e-02f, 9.682458366e-02f, -9.682458366e-02f, 0.000000000e+00f, -9.682458366e-02f, 0.000000000e+00f, },
{ 7.142857143e-02f, 7.142857143e-02f, -7.142857143e-02f, -7.142857143e-02f, -9.682458366e-02f, -9.682458366e-02f, 0.000000000e+00f, 9.682458366e-02f, 0.000000000e+00f, },
{ 7.142857143e-02f, -7.142857143e-02f, -7.142857143e-02f, 7.142857143e-02f, -9.682458366e-02f, 9.682458366e-02f, 0.000000000e+00f, -9.682458366e-02f, 0.000000000e+00f, },
{ 7.142857143e-02f, -7.142857143e-02f, -7.142857143e-02f, -7.142857143e-02f, 9.682458366e-02f, 9.682458366e-02f, 0.000000000e+00f, 9.682458366e-02f, 0.000000000e+00f, },
{ 8.333333333e-02f, 0.000000000e+00f, -7.588274978e-02f, 1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, -1.591525047e-02f, -1.443375673e-01f, 1.167715449e-01f, },
{ 8.333333333e-02f, -1.227808683e-01f, 0.000000000e+00f, 7.588274978e-02f, -1.443375673e-01f, 0.000000000e+00f, -9.316949906e-02f, 0.000000000e+00f, -7.216878365e-02f, },
{ 8.333333333e-02f, -7.588274978e-02f, 1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, -1.443375673e-01f, 1.090847495e-01f, 0.000000000e+00f, -4.460276122e-02f, },
{ 8.333333333e-02f, 0.000000000e+00f, 7.588274978e-02f, 1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, -1.591525047e-02f, 1.443375673e-01f, 1.167715449e-01f, },
{ 8.333333333e-02f, -1.227808683e-01f, 0.000000000e+00f, -7.588274978e-02f, 1.443375673e-01f, 0.000000000e+00f, -9.316949906e-02f, 0.000000000e+00f, -7.216878365e-02f, },
{ 8.333333333e-02f, 7.588274978e-02f, -1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, -1.443375673e-01f, 1.090847495e-01f, 0.000000000e+00f, -4.460276122e-02f, },
{ 8.333333333e-02f, 0.000000000e+00f, -7.588274978e-02f, -1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, -1.591525047e-02f, 1.443375673e-01f, 1.167715449e-01f, },
{ 8.333333333e-02f, 1.227808683e-01f, 0.000000000e+00f, -7.588274978e-02f, -1.443375673e-01f, 0.000000000e+00f, -9.316949906e-02f, 0.000000000e+00f, -7.216878365e-02f, },
{ 8.333333333e-02f, 7.588274978e-02f, 1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, 1.443375673e-01f, 1.090847495e-01f, 0.000000000e+00f, -4.460276122e-02f, },
{ 8.333333333e-02f, 0.000000000e+00f, 7.588274978e-02f, -1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, -1.591525047e-02f, -1.443375673e-01f, 1.167715449e-01f, },
{ 8.333333333e-02f, 1.227808683e-01f, 0.000000000e+00f, 7.588274978e-02f, 1.443375673e-01f, 0.000000000e+00f, -9.316949906e-02f, 0.000000000e+00f, -7.216878365e-02f, },
{ 8.333333333e-02f, -7.588274978e-02f, -1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, 1.443375673e-01f, 1.090847495e-01f, 0.000000000e+00f, -4.460276122e-02f, },
}, AmbiMatrix3O[][MaxAmbiChannels]{
{ 5.000000000e-02f, 3.090169944e-02f, 8.090169944e-02f, 0.000000000e+00f, 0.000000000e+00f, 6.454972244e-02f, 9.045084972e-02f, 0.000000000e+00f, -1.232790000e-02f, -1.256118221e-01f, 0.000000000e+00f, 1.126112056e-01f, 7.944389175e-02f, 0.000000000e+00f, 2.421151497e-02f, 0.000000000e+00f, },
{ 5.000000000e-02f, -3.090169944e-02f, 8.090169944e-02f, 0.000000000e+00f, 0.000000000e+00f, -6.454972244e-02f, 9.045084972e-02f, 0.000000000e+00f, -1.232790000e-02f, 1.256118221e-01f, 0.000000000e+00f, -1.126112056e-01f, 7.944389175e-02f, 0.000000000e+00f, 2.421151497e-02f, 0.000000000e+00f, },
@ -818,8 +817,8 @@ void InitHrtfPanning(ALCdevice *device)
static const float AmbiOrderHFGain1O[MaxAmbiOrder+1]{
/*ENRGY*/ 2.000000000e+00f, 1.154700538e+00f
}, AmbiOrderHFGain2O[MaxAmbiOrder+1]{
/*ENRGY 1.972026594e+00f, 1.527525232e+00f, 7.888106377e-01f*/
/*AMP*/ 1.000000000e+00f, 7.745966692e-01f, 4.000000000e-01f
/*ENRGY*/ 1.825741858e+00f, 1.414213562e+00f, 7.302967433e-01f
/*AMP 1.000000000e+00f, 7.745966692e-01f, 4.000000000e-01f*/
/*RMS 9.128709292e-01f, 7.071067812e-01f, 3.651483717e-01f*/
}, AmbiOrderHFGain3O[MaxAmbiOrder+1]{
/*ENRGY 1.865086714e+00f, 1.606093894e+00f, 1.142055301e+00f, 5.683795528e-01f*/
@ -889,11 +888,13 @@ void InitHrtfPanning(ALCdevice *device)
(device->mRenderMode == RenderMode::Hrtf) ? "+ Full " : "",
device->mHrtfName.c_str());
bool perHrirMin{false};
al::span<const AngularPoint> AmbiPoints{AmbiPoints1O};
const float (*AmbiMatrix)[MaxAmbiChannels]{AmbiMatrix1O};
al::span<const float,MaxAmbiOrder+1> AmbiOrderHFGain{AmbiOrderHFGain1O};
if(ambi_order >= 3)
{
perHrirMin = true;
AmbiPoints = AmbiPoints3O;
AmbiMatrix = AmbiMatrix3O;
AmbiOrderHFGain = AmbiOrderHFGain3O;
@ -915,7 +916,7 @@ void InitHrtfPanning(ALCdevice *device)
HrtfStore *Hrtf{device->mHrtf.get()};
auto hrtfstate = DirectHrtfState::Create(count);
hrtfstate->build(Hrtf, device->mIrSize, AmbiPoints, AmbiMatrix, device->mXOverFreq,
hrtfstate->build(Hrtf, device->mIrSize, perHrirMin, AmbiPoints, AmbiMatrix, device->mXOverFreq,
AmbiOrderHFGain);
device->mHrtfState = std::move(hrtfstate);

56
core/ambidefs.cpp
View File

@ -99,37 +99,33 @@ auto CalcFirstOrder2DUp()
}
constexpr std::array<std::array<float,9>,14> SecondOrderDecoder{{
{{ 7.142857143e-02f, 0.000000000e+00f, 0.000000000e+00f, 1.237179148e-01f, 0.000000000e+00f, 0.000000000e+00f, -7.453559925e-02f, 0.000000000e+00f, 1.290994449e-01f, }},
{{ 7.142857143e-02f, 0.000000000e+00f, 0.000000000e+00f, -1.237179148e-01f, 0.000000000e+00f, 0.000000000e+00f, -7.453559925e-02f, 0.000000000e+00f, 1.290994449e-01f, }},
{{ 7.142857143e-02f, 1.237179148e-01f, 0.000000000e+00f, 0.000000000e+00f, 0.000000000e+00f, 0.000000000e+00f, -7.453559925e-02f, 0.000000000e+00f, -1.290994449e-01f, }},
{{ 7.142857143e-02f, -1.237179148e-01f, 0.000000000e+00f, 0.000000000e+00f, 0.000000000e+00f, 0.000000000e+00f, -7.453559925e-02f, 0.000000000e+00f, -1.290994449e-01f, }},
{{ 7.142857143e-02f, 0.000000000e+00f, 1.237179148e-01f, 0.000000000e+00f, 0.000000000e+00f, 0.000000000e+00f, 1.490711985e-01f, 0.000000000e+00f, 0.000000000e+00f, }},
{{ 7.142857143e-02f, 0.000000000e+00f, -1.237179148e-01f, 0.000000000e+00f, 0.000000000e+00f, 0.000000000e+00f, 1.490711985e-01f, 0.000000000e+00f, 0.000000000e+00f, }},
{{ 7.142857143e-02f, 7.142857143e-02f, 7.142857143e-02f, 7.142857143e-02f, 9.682458366e-02f, 9.682458366e-02f, 0.000000000e+00f, 9.682458366e-02f, 0.000000000e+00f, }},
{{ 7.142857143e-02f, 7.142857143e-02f, 7.142857143e-02f, -7.142857143e-02f, -9.682458366e-02f, 9.682458366e-02f, 0.000000000e+00f, -9.682458366e-02f, 0.000000000e+00f, }},
{{ 7.142857143e-02f, -7.142857143e-02f, 7.142857143e-02f, 7.142857143e-02f, -9.682458366e-02f, -9.682458366e-02f, 0.000000000e+00f, 9.682458366e-02f, 0.000000000e+00f, }},
{{ 7.142857143e-02f, -7.142857143e-02f, 7.142857143e-02f, -7.142857143e-02f, 9.682458366e-02f, -9.682458366e-02f, 0.000000000e+00f, -9.682458366e-02f, 0.000000000e+00f, }},
{{ 7.142857143e-02f, 7.142857143e-02f, -7.142857143e-02f, 7.142857143e-02f, 9.682458366e-02f, -9.682458366e-02f, 0.000000000e+00f, -9.682458366e-02f, 0.000000000e+00f, }},
{{ 7.142857143e-02f, 7.142857143e-02f, -7.142857143e-02f, -7.142857143e-02f, -9.682458366e-02f, -9.682458366e-02f, 0.000000000e+00f, 9.682458366e-02f, 0.000000000e+00f, }},
{{ 7.142857143e-02f, -7.142857143e-02f, -7.142857143e-02f, 7.142857143e-02f, -9.682458366e-02f, 9.682458366e-02f, 0.000000000e+00f, -9.682458366e-02f, 0.000000000e+00f, }},
{{ 7.142857143e-02f, -7.142857143e-02f, -7.142857143e-02f, -7.142857143e-02f, 9.682458366e-02f, 9.682458366e-02f, 0.000000000e+00f, 9.682458366e-02f, 0.000000000e+00f, }},
constexpr std::array<std::array<float,9>,12> SecondOrderDecoder{{
{{ 8.333333333e-02f, 0.000000000e+00f, -7.588274978e-02f, 1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, -1.591525047e-02f, -1.443375673e-01f, 1.167715449e-01f, }},
{{ 8.333333333e-02f, -1.227808683e-01f, 0.000000000e+00f, 7.588274978e-02f, -1.443375673e-01f, 0.000000000e+00f, -9.316949906e-02f, 0.000000000e+00f, -7.216878365e-02f, }},
{{ 8.333333333e-02f, -7.588274978e-02f, 1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, -1.443375673e-01f, 1.090847495e-01f, 0.000000000e+00f, -4.460276122e-02f, }},
{{ 8.333333333e-02f, 0.000000000e+00f, 7.588274978e-02f, 1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, -1.591525047e-02f, 1.443375673e-01f, 1.167715449e-01f, }},
{{ 8.333333333e-02f, -1.227808683e-01f, 0.000000000e+00f, -7.588274978e-02f, 1.443375673e-01f, 0.000000000e+00f, -9.316949906e-02f, 0.000000000e+00f, -7.216878365e-02f, }},
{{ 8.333333333e-02f, 7.588274978e-02f, -1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, -1.443375673e-01f, 1.090847495e-01f, 0.000000000e+00f, -4.460276122e-02f, }},
{{ 8.333333333e-02f, 0.000000000e+00f, -7.588274978e-02f, -1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, -1.591525047e-02f, 1.443375673e-01f, 1.167715449e-01f, }},
{{ 8.333333333e-02f, 1.227808683e-01f, 0.000000000e+00f, -7.588274978e-02f, -1.443375673e-01f, 0.000000000e+00f, -9.316949906e-02f, 0.000000000e+00f, -7.216878365e-02f, }},
{{ 8.333333333e-02f, 7.588274978e-02f, 1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, 1.443375673e-01f, 1.090847495e-01f, 0.000000000e+00f, -4.460276122e-02f, }},
{{ 8.333333333e-02f, 0.000000000e+00f, 7.588274978e-02f, -1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, -1.591525047e-02f, -1.443375673e-01f, 1.167715449e-01f, }},
{{ 8.333333333e-02f, 1.227808683e-01f, 0.000000000e+00f, 7.588274978e-02f, 1.443375673e-01f, 0.000000000e+00f, -9.316949906e-02f, 0.000000000e+00f, -7.216878365e-02f, }},
{{ 8.333333333e-02f, -7.588274978e-02f, -1.227808683e-01f, 0.000000000e+00f, 0.000000000e+00f, 1.443375673e-01f, 1.090847495e-01f, 0.000000000e+00f, -4.460276122e-02f, }},
}};
constexpr std::array<AmbiChannelFloatArray,14> SecondOrderEncoder{{
CalcAmbiCoeffs( 0.0000000f, 0.0000000f, 1.0000000f),
CalcAmbiCoeffs( 0.0000000f, 0.0000000f, -1.0000000f),
CalcAmbiCoeffs( 1.0000000f, 0.0000000f, 0.0000000f),
CalcAmbiCoeffs(-1.0000000f, 0.0000000f, 0.0000000f),
CalcAmbiCoeffs( 0.0000000f, 1.0000000f, 0.0000000f),
CalcAmbiCoeffs( 0.0000000f, -1.0000000f, 0.0000000f),
CalcAmbiCoeffs( inv_sqrt3f, inv_sqrt3f, inv_sqrt3f),
CalcAmbiCoeffs( inv_sqrt3f, inv_sqrt3f, -inv_sqrt3f),
CalcAmbiCoeffs(-inv_sqrt3f, inv_sqrt3f, inv_sqrt3f),
CalcAmbiCoeffs(-inv_sqrt3f, inv_sqrt3f, -inv_sqrt3f),
CalcAmbiCoeffs( inv_sqrt3f, -inv_sqrt3f, inv_sqrt3f),
CalcAmbiCoeffs( inv_sqrt3f, -inv_sqrt3f, -inv_sqrt3f),
CalcAmbiCoeffs(-inv_sqrt3f, -inv_sqrt3f, inv_sqrt3f),
CalcAmbiCoeffs(-inv_sqrt3f, -inv_sqrt3f, -inv_sqrt3f),
constexpr std::array<AmbiChannelFloatArray,12> SecondOrderEncoder{{
CalcAmbiCoeffs( 0.000000000e+00f, -5.257311121e-01f, 8.506508084e-01f),
CalcAmbiCoeffs(-8.506508084e-01f, 0.000000000e+00f, 5.257311121e-01f),
CalcAmbiCoeffs(-5.257311121e-01f, 8.506508084e-01f, 0.000000000e+00f),
CalcAmbiCoeffs( 0.000000000e+00f, 5.257311121e-01f, 8.506508084e-01f),
CalcAmbiCoeffs(-8.506508084e-01f, 0.000000000e+00f, -5.257311121e-01f),
CalcAmbiCoeffs( 5.257311121e-01f, -8.506508084e-01f, 0.000000000e+00f),
CalcAmbiCoeffs( 0.000000000e+00f, -5.257311121e-01f, -8.506508084e-01f),
CalcAmbiCoeffs( 8.506508084e-01f, 0.000000000e+00f, -5.257311121e-01f),
CalcAmbiCoeffs( 5.257311121e-01f, 8.506508084e-01f, 0.000000000e+00f),
CalcAmbiCoeffs( 0.000000000e+00f, 5.257311121e-01f, -8.506508084e-01f),
CalcAmbiCoeffs( 8.506508084e-01f, 0.000000000e+00f, 5.257311121e-01f),
CalcAmbiCoeffs(-5.257311121e-01f, -8.506508084e-01f, 0.000000000e+00f),
}};
static_assert(SecondOrderDecoder.size() == SecondOrderEncoder.size(), "Second-order mismatch");

5
core/hrtf.cpp
View File

@ -262,7 +262,7 @@ void GetHrtfCoeffs(const HrtfStore *Hrtf, float elevation, float azimuth, float
std::unique_ptr<DirectHrtfState> DirectHrtfState::Create(size_t num_chans)
{ return std::unique_ptr<DirectHrtfState>{new(FamCount(num_chans)) DirectHrtfState{num_chans}}; }
void DirectHrtfState::build(const HrtfStore *Hrtf, const uint irSize,
void DirectHrtfState::build(const HrtfStore *Hrtf, const uint irSize, const bool perHrirMin,
const al::span<const AngularPoint> AmbiPoints, const float (*AmbiMatrix)[MaxAmbiChannels],
const float XOverFreq, const al::span<const float,MaxAmbiOrder+1> AmbiOrderHFGain)
{
@ -318,13 +318,12 @@ void DirectHrtfState::build(const HrtfStore *Hrtf, const uint irSize,
TRACE("Min delay: %.2f, max delay: %.2f, FIR length: %u\n",
min_delay/double{HrirDelayFracOne}, max_delay/double{HrirDelayFracOne}, irSize);
const bool per_hrir_min{mChannels.size() > AmbiChannelsFromOrder(1)};
auto tmpres = al::vector<std::array<double2,HrirLength>>(mChannels.size());
max_delay = 0;
for(size_t c{0u};c < AmbiPoints.size();++c)
{
const ConstHrirSpan hrir{impres[c].hrir};
const uint base_delay{per_hrir_min ? minu(impres[c].ldelay, impres[c].rdelay) : min_delay};
const uint base_delay{perHrirMin ? minu(impres[c].ldelay, impres[c].rdelay) : min_delay};
const uint ldelay{hrir_delay_round(impres[c].ldelay - base_delay)};
const uint rdelay{hrir_delay_round(impres[c].rdelay - base_delay)};
max_delay = maxu(max_delay, maxu(impres[c].ldelay, impres[c].rdelay) - base_delay);

2
core/hrtf.h
View File

@ -71,7 +71,7 @@ struct DirectHrtfState {
* high-frequency gains for the decoder. The calculated impulse responses
* are ordered and scaled according to the matrix input.
*/
void build(const HrtfStore *Hrtf, const uint irSize,
void build(const HrtfStore *Hrtf, const uint irSize, const bool perHrirMin,
const al::span<const AngularPoint> AmbiPoints, const float (*AmbiMatrix)[MaxAmbiChannels],
const float XOverFreq, const al::span<const float,MaxAmbiOrder+1> AmbiOrderHFGain);