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Diffstat (limited to 'Alc/panning.cpp')
| -rw-r--r-- | Alc/panning.cpp | 964 |
1 files changed, 0 insertions, 964 deletions
diff --git a/Alc/panning.cpp b/Alc/panning.cpp deleted file mode 100644 index 3a67e33a..00000000 --- a/Alc/panning.cpp +++ /dev/null @@ -1,964 +0,0 @@ -/** - * OpenAL cross platform audio library - * Copyright (C) 1999-2010 by authors. - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - * Or go to http://www.gnu.org/copyleft/lgpl.html - */ - -#include "config.h" - -#include <cmath> -#include <cstdlib> -#include <cstring> -#include <cctype> -#include <cassert> - -#include <cmath> -#include <chrono> -#include <numeric> -#include <algorithm> -#include <functional> - -#include "alcmain.h" -#include "alAuxEffectSlot.h" -#include "alu.h" -#include "alconfig.h" -#include "ambdec.h" -#include "bformatdec.h" -#include "filters/splitter.h" -#include "uhjfilter.h" -#include "bs2b.h" - -#include "alspan.h" - - -constexpr std::array<float,MAX_AMBI_CHANNELS> AmbiScale::FromN3D; -constexpr std::array<float,MAX_AMBI_CHANNELS> AmbiScale::FromSN3D; -constexpr std::array<float,MAX_AMBI_CHANNELS> AmbiScale::FromFuMa; -constexpr std::array<int,MAX_AMBI_CHANNELS> AmbiIndex::FromFuMa; -constexpr std::array<int,MAX_AMBI_CHANNELS> AmbiIndex::FromACN; -constexpr std::array<int,MAX_AMBI2D_CHANNELS> AmbiIndex::From2D; -constexpr std::array<int,MAX_AMBI_CHANNELS> AmbiIndex::From3D; - - -namespace { - -using namespace std::placeholders; -using std::chrono::seconds; -using std::chrono::nanoseconds; - -inline const char *GetLabelFromChannel(Channel channel) -{ - switch(channel) - { - case FrontLeft: return "front-left"; - case FrontRight: return "front-right"; - case FrontCenter: return "front-center"; - case LFE: return "lfe"; - case BackLeft: return "back-left"; - case BackRight: return "back-right"; - case BackCenter: return "back-center"; - case SideLeft: return "side-left"; - case SideRight: return "side-right"; - - case UpperFrontLeft: return "upper-front-left"; - case UpperFrontRight: return "upper-front-right"; - case UpperBackLeft: return "upper-back-left"; - case UpperBackRight: return "upper-back-right"; - case LowerFrontLeft: return "lower-front-left"; - case LowerFrontRight: return "lower-front-right"; - case LowerBackLeft: return "lower-back-left"; - case LowerBackRight: return "lower-back-right"; - - case Aux0: return "aux-0"; - case Aux1: return "aux-1"; - case Aux2: return "aux-2"; - case Aux3: return "aux-3"; - case Aux4: return "aux-4"; - case Aux5: return "aux-5"; - case Aux6: return "aux-6"; - case Aux7: return "aux-7"; - case Aux8: return "aux-8"; - case Aux9: return "aux-9"; - case Aux10: return "aux-10"; - case Aux11: return "aux-11"; - case Aux12: return "aux-12"; - case Aux13: return "aux-13"; - case Aux14: return "aux-14"; - case Aux15: return "aux-15"; - - case MaxChannels: break; - } - return "(unknown)"; -} - - -void AllocChannels(ALCdevice *device, const ALuint main_chans, const ALuint real_chans) -{ - TRACE("Channel config, Main: %u, Real: %u\n", main_chans, real_chans); - - /* Allocate extra channels for any post-filter output. */ - const ALuint num_chans{main_chans + real_chans}; - - TRACE("Allocating %u channels, %zu bytes\n", num_chans, - num_chans*sizeof(device->MixBuffer[0])); - device->MixBuffer.resize(num_chans); - al::span<FloatBufferLine> buffer{device->MixBuffer.data(), device->MixBuffer.size()}; - - device->Dry.Buffer = buffer.first(main_chans); - buffer = buffer.subspan(main_chans); - if(real_chans != 0) - { - device->RealOut.Buffer = buffer.first(real_chans); - buffer = buffer.subspan(real_chans); - } - else - device->RealOut.Buffer = device->Dry.Buffer; -} - - -struct ChannelMap { - Channel ChanName; - ALfloat Config[MAX_AMBI2D_CHANNELS]; -}; - -bool MakeSpeakerMap(ALCdevice *device, const AmbDecConf *conf, ALsizei (&speakermap)[MAX_OUTPUT_CHANNELS]) -{ - auto map_spkr = [device](const AmbDecConf::SpeakerConf &speaker) -> ALsizei - { - /* NOTE: AmbDec does not define any standard speaker names, however - * for this to work we have to by able to find the output channel - * the speaker definition corresponds to. Therefore, OpenAL Soft - * requires these channel labels to be recognized: - * - * LF = Front left - * RF = Front right - * LS = Side left - * RS = Side right - * LB = Back left - * RB = Back right - * CE = Front center - * CB = Back center - * - * Additionally, surround51 will acknowledge back speakers for side - * channels, and surround51rear will acknowledge side speakers for - * back channels, to avoid issues with an ambdec expecting 5.1 to - * use the side channels when the device is configured for back, - * and vice-versa. - */ - Channel ch{}; - if(speaker.Name == "LF") - ch = FrontLeft; - else if(speaker.Name == "RF") - ch = FrontRight; - else if(speaker.Name == "CE") - ch = FrontCenter; - else if(speaker.Name == "LS") - { - if(device->FmtChans == DevFmtX51Rear) - ch = BackLeft; - else - ch = SideLeft; - } - else if(speaker.Name == "RS") - { - if(device->FmtChans == DevFmtX51Rear) - ch = BackRight; - else - ch = SideRight; - } - else if(speaker.Name == "LB") - { - if(device->FmtChans == DevFmtX51) - ch = SideLeft; - else - ch = BackLeft; - } - else if(speaker.Name == "RB") - { - if(device->FmtChans == DevFmtX51) - ch = SideRight; - else - ch = BackRight; - } - else if(speaker.Name == "CB") - ch = BackCenter; - else - { - const char *name{speaker.Name.c_str()}; - unsigned int n; - char c; - - if(sscanf(name, "AUX%u%c", &n, &c) == 1 && n < 16) - ch = static_cast<Channel>(Aux0+n); - else - { - ERR("AmbDec speaker label \"%s\" not recognized\n", name); - return -1; - } - } - const int chidx{GetChannelIdxByName(device->RealOut, ch)}; - if(chidx == -1) - ERR("Failed to lookup AmbDec speaker label %s\n", speaker.Name.c_str()); - return chidx; - }; - std::transform(conf->Speakers.begin(), conf->Speakers.end(), std::begin(speakermap), map_spkr); - /* Return success if no invalid entries are found. */ - auto speakermap_end = std::begin(speakermap) + conf->Speakers.size(); - return std::find(std::begin(speakermap), speakermap_end, -1) == speakermap_end; -} - - -constexpr ChannelMap MonoCfg[1] = { - { FrontCenter, { 1.0f } }, -}, StereoCfg[2] = { - { FrontLeft, { 5.00000000e-1f, 2.88675135e-1f, 5.52305643e-2f } }, - { FrontRight, { 5.00000000e-1f, -2.88675135e-1f, 5.52305643e-2f } }, -}, QuadCfg[4] = { - { BackLeft, { 3.53553391e-1f, 2.04124145e-1f, -2.04124145e-1f } }, - { FrontLeft, { 3.53553391e-1f, 2.04124145e-1f, 2.04124145e-1f } }, - { FrontRight, { 3.53553391e-1f, -2.04124145e-1f, 2.04124145e-1f } }, - { BackRight, { 3.53553391e-1f, -2.04124145e-1f, -2.04124145e-1f } }, -}, X51SideCfg[4] = { - { SideLeft, { 3.33000782e-1f, 1.89084803e-1f, -2.00042375e-1f, -2.12307769e-2f, -1.14579885e-2f } }, - { FrontLeft, { 1.88542860e-1f, 1.27709292e-1f, 1.66295695e-1f, 7.30571517e-2f, 2.10901184e-2f } }, - { FrontRight, { 1.88542860e-1f, -1.27709292e-1f, 1.66295695e-1f, -7.30571517e-2f, 2.10901184e-2f } }, - { SideRight, { 3.33000782e-1f, -1.89084803e-1f, -2.00042375e-1f, 2.12307769e-2f, -1.14579885e-2f } }, -}, X51RearCfg[4] = { - { BackLeft, { 3.33000782e-1f, 1.89084803e-1f, -2.00042375e-1f, -2.12307769e-2f, -1.14579885e-2f } }, - { FrontLeft, { 1.88542860e-1f, 1.27709292e-1f, 1.66295695e-1f, 7.30571517e-2f, 2.10901184e-2f } }, - { FrontRight, { 1.88542860e-1f, -1.27709292e-1f, 1.66295695e-1f, -7.30571517e-2f, 2.10901184e-2f } }, - { BackRight, { 3.33000782e-1f, -1.89084803e-1f, -2.00042375e-1f, 2.12307769e-2f, -1.14579885e-2f } }, -}, X61Cfg[6] = { - { SideLeft, { 2.04460341e-1f, 2.17177926e-1f, -4.39996780e-2f, -2.60790269e-2f, -6.87239792e-2f } }, - { FrontLeft, { 1.58923161e-1f, 9.21772680e-2f, 1.59658796e-1f, 6.66278083e-2f, 3.84686854e-2f } }, - { FrontRight, { 1.58923161e-1f, -9.21772680e-2f, 1.59658796e-1f, -6.66278083e-2f, 3.84686854e-2f } }, - { SideRight, { 2.04460341e-1f, -2.17177926e-1f, -4.39996780e-2f, 2.60790269e-2f, -6.87239792e-2f } }, - { BackCenter, { 2.50001688e-1f, 0.00000000e+0f, -2.50000094e-1f, 0.00000000e+0f, 6.05133395e-2f } }, -}, X71Cfg[6] = { - { BackLeft, { 2.04124145e-1f, 1.08880247e-1f, -1.88586120e-1f, -1.29099444e-1f, 7.45355993e-2f, 3.73460789e-2f, 0.00000000e+0f } }, - { SideLeft, { 2.04124145e-1f, 2.17760495e-1f, 0.00000000e+0f, 0.00000000e+0f, -1.49071198e-1f, -3.73460789e-2f, 0.00000000e+0f } }, - { FrontLeft, { 2.04124145e-1f, 1.08880247e-1f, 1.88586120e-1f, 1.29099444e-1f, 7.45355993e-2f, 3.73460789e-2f, 0.00000000e+0f } }, - { FrontRight, { 2.04124145e-1f, -1.08880247e-1f, 1.88586120e-1f, -1.29099444e-1f, 7.45355993e-2f, -3.73460789e-2f, 0.00000000e+0f } }, - { SideRight, { 2.04124145e-1f, -2.17760495e-1f, 0.00000000e+0f, 0.00000000e+0f, -1.49071198e-1f, 3.73460789e-2f, 0.00000000e+0f } }, - { BackRight, { 2.04124145e-1f, -1.08880247e-1f, -1.88586120e-1f, 1.29099444e-1f, 7.45355993e-2f, -3.73460789e-2f, 0.00000000e+0f } }, -}; - -void InitNearFieldCtrl(ALCdevice *device, ALfloat ctrl_dist, ALsizei order, - const al::span<const ALuint,MAX_AMBI_ORDER+1> chans_per_order) -{ - /* NFC is only used when AvgSpeakerDist is greater than 0. */ - const char *devname{device->DeviceName.c_str()}; - if(!GetConfigValueBool(devname, "decoder", "nfc", 0) || !(ctrl_dist > 0.0f)) - return; - - device->AvgSpeakerDist = clampf(ctrl_dist, 0.1f, 10.0f); - TRACE("Using near-field reference distance: %.2f meters\n", device->AvgSpeakerDist); - - auto iter = std::copy(chans_per_order.begin(), chans_per_order.begin()+order+1, - std::begin(device->NumChannelsPerOrder)); - std::fill(iter, std::end(device->NumChannelsPerOrder), 0u); -} - -void InitDistanceComp(ALCdevice *device, const AmbDecConf *conf, const ALsizei (&speakermap)[MAX_OUTPUT_CHANNELS]) -{ - auto get_max = std::bind(maxf, _1, - std::bind(std::mem_fn(&AmbDecConf::SpeakerConf::Distance), _2)); - const ALfloat maxdist{ - std::accumulate(conf->Speakers.begin(), conf->Speakers.end(), float{0.0f}, get_max)}; - - const char *devname{device->DeviceName.c_str()}; - if(!GetConfigValueBool(devname, "decoder", "distance-comp", 1) || !(maxdist > 0.0f)) - return; - - const auto distSampleScale = static_cast<ALfloat>(device->Frequency)/SPEEDOFSOUNDMETRESPERSEC; - const auto ChanDelay = device->ChannelDelay.as_span(); - size_t total{0u}; - for(size_t i{0u};i < conf->Speakers.size();i++) - { - const AmbDecConf::SpeakerConf &speaker = conf->Speakers[i]; - const ALsizei chan{speakermap[i]}; - - /* Distance compensation only delays in steps of the sample rate. This - * is a bit less accurate since the delay time falls to the nearest - * sample time, but it's far simpler as it doesn't have to deal with - * phase offsets. This means at 48khz, for instance, the distance delay - * will be in steps of about 7 millimeters. - */ - ALfloat delay{std::floor((maxdist - speaker.Distance)*distSampleScale + 0.5f)}; - if(delay > ALfloat{MAX_DELAY_LENGTH-1}) - { - ERR("Delay for speaker \"%s\" exceeds buffer length (%f > %d)\n", - speaker.Name.c_str(), delay, MAX_DELAY_LENGTH-1); - delay = ALfloat{MAX_DELAY_LENGTH-1}; - } - - ChanDelay[chan].Length = static_cast<ALsizei>(delay); - ChanDelay[chan].Gain = speaker.Distance / maxdist; - TRACE("Channel %u \"%s\" distance compensation: %d samples, %f gain\n", chan, - speaker.Name.c_str(), ChanDelay[chan].Length, ChanDelay[chan].Gain); - - /* Round up to the next 4th sample, so each channel buffer starts - * 16-byte aligned. - */ - total += RoundUp(ChanDelay[chan].Length, 4); - } - - if(total > 0) - { - device->ChannelDelay.setSampleCount(total); - ChanDelay[0].Buffer = device->ChannelDelay.getSamples(); - auto set_bufptr = [](const DistanceComp::DistData &last, const DistanceComp::DistData &cur) -> DistanceComp::DistData - { - DistanceComp::DistData ret{cur}; - ret.Buffer = last.Buffer + RoundUp(last.Length, 4); - return ret; - }; - std::partial_sum(ChanDelay.begin(), ChanDelay.end(), ChanDelay.begin(), set_bufptr); - } -} - - -auto GetAmbiScales(AmbiNorm scaletype) noexcept -> const std::array<float,MAX_AMBI_CHANNELS>& -{ - if(scaletype == AmbiNorm::FuMa) return AmbiScale::FromFuMa; - if(scaletype == AmbiNorm::SN3D) return AmbiScale::FromSN3D; - return AmbiScale::FromN3D; -} - -auto GetAmbiLayout(AmbiLayout layouttype) noexcept -> const std::array<int,MAX_AMBI_CHANNELS>& -{ - if(layouttype == AmbiLayout::FuMa) return AmbiIndex::FromFuMa; - return AmbiIndex::FromACN; -} - - -void InitPanning(ALCdevice *device) -{ - al::span<const ChannelMap> chanmap; - ALuint coeffcount{}; - - switch(device->FmtChans) - { - case DevFmtMono: - chanmap = MonoCfg; - coeffcount = 1; - break; - - case DevFmtStereo: - chanmap = StereoCfg; - coeffcount = 3; - break; - - case DevFmtQuad: - chanmap = QuadCfg; - coeffcount = 3; - break; - - case DevFmtX51: - chanmap = X51SideCfg; - coeffcount = 5; - break; - - case DevFmtX51Rear: - chanmap = X51RearCfg; - coeffcount = 5; - break; - - case DevFmtX61: - chanmap = X61Cfg; - coeffcount = 5; - break; - - case DevFmtX71: - chanmap = X71Cfg; - coeffcount = 7; - break; - - case DevFmtAmbi3D: - break; - } - - if(device->FmtChans == DevFmtAmbi3D) - { - const char *devname{device->DeviceName.c_str()}; - const std::array<int,MAX_AMBI_CHANNELS> &acnmap = GetAmbiLayout(device->mAmbiLayout); - const std::array<float,MAX_AMBI_CHANNELS> &n3dscale = GetAmbiScales(device->mAmbiScale); - - /* For DevFmtAmbi3D, the ambisonic order is already set. */ - const size_t count{AmbiChannelsFromOrder(device->mAmbiOrder)}; - std::transform(acnmap.begin(), acnmap.begin()+count, std::begin(device->Dry.AmbiMap), - [&n3dscale](const ALsizei &acn) noexcept -> BFChannelConfig - { return BFChannelConfig{1.0f/n3dscale[acn], acn}; } - ); - AllocChannels(device, static_cast<ALuint>(count), 0); - - ALfloat nfc_delay{ConfigValueFloat(devname, "decoder", "nfc-ref-delay").value_or(0.0f)}; - if(nfc_delay > 0.0f) - { - static constexpr ALuint chans_per_order[MAX_AMBI_ORDER+1]{ 1, 3, 5, 7 }; - InitNearFieldCtrl(device, nfc_delay * SPEEDOFSOUNDMETRESPERSEC, device->mAmbiOrder, - chans_per_order); - } - } - else - { - ChannelDec chancoeffs[MAX_OUTPUT_CHANNELS]{}; - ALsizei idxmap[MAX_OUTPUT_CHANNELS]{}; - for(size_t i{0u};i < chanmap.size();++i) - { - const ALint idx{GetChannelIdxByName(device->RealOut, chanmap[i].ChanName)}; - if(idx < 0) - { - ERR("Failed to find %s channel in device\n", - GetLabelFromChannel(chanmap[i].ChanName)); - continue; - } - idxmap[i] = idx; - std::copy_n(chanmap[i].Config, coeffcount, chancoeffs[i]); - } - - /* For non-DevFmtAmbi3D, set the ambisonic order given the mixing - * channel count. Built-in speaker decoders are always 2D, so just - * reverse that calculation. - */ - device->mAmbiOrder = static_cast<ALsizei>((coeffcount-1) / 2); - - std::transform(AmbiIndex::From2D.begin(), AmbiIndex::From2D.begin()+coeffcount, - std::begin(device->Dry.AmbiMap), - [](const ALsizei &index) noexcept { return BFChannelConfig{1.0f, index}; } - ); - AllocChannels(device, coeffcount, device->channelsFromFmt()); - - TRACE("Enabling %s-order%s ambisonic decoder\n", - (coeffcount > 5) ? "third" : - (coeffcount > 3) ? "second" : "first", - "" - ); - device->AmbiDecoder = al::make_unique<BFormatDec>(coeffcount, - static_cast<ALsizei>(chanmap.size()), chancoeffs, idxmap); - } -} - -void InitCustomPanning(ALCdevice *device, bool hqdec, const AmbDecConf *conf, const ALsizei (&speakermap)[MAX_OUTPUT_CHANNELS]) -{ - static constexpr ALuint chans_per_order2d[MAX_AMBI_ORDER+1] = { 1, 2, 2, 2 }; - static constexpr ALuint chans_per_order3d[MAX_AMBI_ORDER+1] = { 1, 3, 5, 7 }; - - if(!hqdec && conf->FreqBands != 1) - ERR("Basic renderer uses the high-frequency matrix as single-band (xover_freq = %.0fhz)\n", - conf->XOverFreq); - - ALsizei order{(conf->ChanMask > AMBI_2ORDER_MASK) ? 3 : - (conf->ChanMask > AMBI_1ORDER_MASK) ? 2 : 1}; - device->mAmbiOrder = order; - - ALuint count; - if((conf->ChanMask&AMBI_PERIPHONIC_MASK)) - { - count = static_cast<ALuint>(AmbiChannelsFromOrder(order)); - std::transform(AmbiIndex::From3D.begin(), AmbiIndex::From3D.begin()+count, - std::begin(device->Dry.AmbiMap), - [](const ALsizei &index) noexcept { return BFChannelConfig{1.0f, index}; } - ); - } - else - { - count = static_cast<ALuint>(Ambi2DChannelsFromOrder(order)); - std::transform(AmbiIndex::From2D.begin(), AmbiIndex::From2D.begin()+count, - std::begin(device->Dry.AmbiMap), - [](const ALsizei &index) noexcept { return BFChannelConfig{1.0f, index}; } - ); - } - AllocChannels(device, count, device->channelsFromFmt()); - - TRACE("Enabling %s-band %s-order%s ambisonic decoder\n", - (!hqdec || conf->FreqBands == 1) ? "single" : "dual", - (conf->ChanMask > AMBI_2ORDER_MASK) ? "third" : - (conf->ChanMask > AMBI_1ORDER_MASK) ? "second" : "first", - (conf->ChanMask&AMBI_PERIPHONIC_MASK) ? " periphonic" : "" - ); - device->AmbiDecoder = al::make_unique<BFormatDec>(conf, hqdec, count, device->Frequency, - speakermap); - - auto accum_spkr_dist = std::bind(std::plus<float>{}, _1, - std::bind(std::mem_fn(&AmbDecConf::SpeakerConf::Distance), _2)); - const ALfloat avg_dist{ - std::accumulate(conf->Speakers.begin(), conf->Speakers.end(), float{0.0f}, - accum_spkr_dist) / static_cast<ALfloat>(conf->Speakers.size()) - }; - InitNearFieldCtrl(device, avg_dist, order, - (conf->ChanMask&AMBI_PERIPHONIC_MASK) ? chans_per_order3d : chans_per_order2d); - - InitDistanceComp(device, conf, speakermap); -} - -void InitHrtfPanning(ALCdevice *device) -{ - /* NOTE: In degrees, and azimuth goes clockwise. */ - static constexpr AngularPoint AmbiPoints[]{ - { 35.264390f, -45.000000f }, - { 35.264390f, 45.000000f }, - { 35.264390f, 135.000000f }, - { 35.264390f, -135.000000f }, - { -35.264390f, -45.000000f }, - { -35.264390f, 45.000000f }, - { -35.264390f, 135.000000f }, - { -35.264390f, -135.000000f }, - { 0.000000f, -20.905157f }, - { 0.000000f, 20.905157f }, - { 0.000000f, 159.094843f }, - { 0.000000f, -159.094843f }, - { 20.905157f, -90.000000f }, - { -20.905157f, -90.000000f }, - { -20.905157f, 90.000000f }, - { 20.905157f, 90.000000f }, - { 69.094843f, 0.000000f }, - { -69.094843f, 0.000000f }, - { -69.094843f, 180.000000f }, - { 69.094843f, 180.000000f }, - }; - static constexpr ALfloat AmbiMatrix[][MAX_AMBI_CHANNELS]{ - { 5.00000000e-02f, 5.00000000e-02f, 5.00000000e-02f, 5.00000000e-02f, 6.45497224e-02f, 6.45497224e-02f, 0.00000000e+00f, 6.45497224e-02f, 0.00000000e+00f, 1.48264644e-02f, 6.33865691e-02f, 1.01126676e-01f, -7.36485380e-02f, -1.09260065e-02f, 7.08683387e-02f, -1.01622099e-01f }, - { 5.00000000e-02f, -5.00000000e-02f, 5.00000000e-02f, 5.00000000e-02f, -6.45497224e-02f, -6.45497224e-02f, 0.00000000e+00f, 6.45497224e-02f, 0.00000000e+00f, -1.48264644e-02f, -6.33865691e-02f, -1.01126676e-01f, -7.36485380e-02f, -1.09260065e-02f, 7.08683387e-02f, -1.01622099e-01f }, - { 5.00000000e-02f, -5.00000000e-02f, 5.00000000e-02f, -5.00000000e-02f, 6.45497224e-02f, -6.45497224e-02f, 0.00000000e+00f, -6.45497224e-02f, 0.00000000e+00f, -1.48264644e-02f, 6.33865691e-02f, -1.01126676e-01f, -7.36485380e-02f, 1.09260065e-02f, 7.08683387e-02f, 1.01622099e-01f }, - { 5.00000000e-02f, 5.00000000e-02f, 5.00000000e-02f, -5.00000000e-02f, -6.45497224e-02f, 6.45497224e-02f, 0.00000000e+00f, -6.45497224e-02f, 0.00000000e+00f, 1.48264644e-02f, -6.33865691e-02f, 1.01126676e-01f, -7.36485380e-02f, 1.09260065e-02f, 7.08683387e-02f, 1.01622099e-01f }, - { 5.00000000e-02f, 5.00000000e-02f, -5.00000000e-02f, 5.00000000e-02f, 6.45497224e-02f, -6.45497224e-02f, 0.00000000e+00f, -6.45497224e-02f, 0.00000000e+00f, 1.48264644e-02f, -6.33865691e-02f, 1.01126676e-01f, 7.36485380e-02f, -1.09260065e-02f, -7.08683387e-02f, -1.01622099e-01f }, - { 5.00000000e-02f, -5.00000000e-02f, -5.00000000e-02f, 5.00000000e-02f, -6.45497224e-02f, 6.45497224e-02f, 0.00000000e+00f, -6.45497224e-02f, 0.00000000e+00f, -1.48264644e-02f, 6.33865691e-02f, -1.01126676e-01f, 7.36485380e-02f, -1.09260065e-02f, -7.08683387e-02f, -1.01622099e-01f }, - { 5.00000000e-02f, -5.00000000e-02f, -5.00000000e-02f, -5.00000000e-02f, 6.45497224e-02f, 6.45497224e-02f, 0.00000000e+00f, 6.45497224e-02f, 0.00000000e+00f, -1.48264644e-02f, -6.33865691e-02f, -1.01126676e-01f, 7.36485380e-02f, 1.09260065e-02f, -7.08683387e-02f, 1.01622099e-01f }, - { 5.00000000e-02f, 5.00000000e-02f, -5.00000000e-02f, -5.00000000e-02f, -6.45497224e-02f, -6.45497224e-02f, 0.00000000e+00f, 6.45497224e-02f, 0.00000000e+00f, 1.48264644e-02f, 6.33865691e-02f, 1.01126676e-01f, 7.36485380e-02f, 1.09260065e-02f, -7.08683387e-02f, 1.01622099e-01f }, - { 5.00000000e-02f, 3.09016994e-02f, 0.00000000e+00f, 8.09016994e-02f, 6.45497224e-02f, 0.00000000e+00f, -5.59016994e-02f, 0.00000000e+00f, 7.21687836e-02f, 7.76323754e-02f, 0.00000000e+00f, -1.49775925e-01f, 0.00000000e+00f, -2.95083663e-02f, 0.00000000e+00f, 7.76323754e-02f }, - { 5.00000000e-02f, -3.09016994e-02f, 0.00000000e+00f, 8.09016994e-02f, -6.45497224e-02f, 0.00000000e+00f, -5.59016994e-02f, 0.00000000e+00f, 7.21687836e-02f, -7.76323754e-02f, 0.00000000e+00f, 1.49775925e-01f, 0.00000000e+00f, -2.95083663e-02f, 0.00000000e+00f, 7.76323754e-02f }, - { 5.00000000e-02f, -3.09016994e-02f, 0.00000000e+00f, -8.09016994e-02f, 6.45497224e-02f, 0.00000000e+00f, -5.59016994e-02f, 0.00000000e+00f, 7.21687836e-02f, -7.76323754e-02f, 0.00000000e+00f, 1.49775925e-01f, 0.00000000e+00f, 2.95083663e-02f, 0.00000000e+00f, -7.76323754e-02f }, - { 5.00000000e-02f, 3.09016994e-02f, 0.00000000e+00f, -8.09016994e-02f, -6.45497224e-02f, 0.00000000e+00f, -5.59016994e-02f, 0.00000000e+00f, 7.21687836e-02f, 7.76323754e-02f, 0.00000000e+00f, -1.49775925e-01f, 0.00000000e+00f, 2.95083663e-02f, 0.00000000e+00f, -7.76323754e-02f }, - { 5.00000000e-02f, 8.09016994e-02f, 3.09016994e-02f, 0.00000000e+00f, 0.00000000e+00f, 6.45497224e-02f, -3.45491503e-02f, 0.00000000e+00f, -8.44966837e-02f, -4.79794466e-02f, 0.00000000e+00f, -6.77901327e-02f, 3.03448665e-02f, 0.00000000e+00f, -1.65948192e-01f, 0.00000000e+00f }, - { 5.00000000e-02f, 8.09016994e-02f, -3.09016994e-02f, 0.00000000e+00f, 0.00000000e+00f, -6.45497224e-02f, -3.45491503e-02f, 0.00000000e+00f, -8.44966837e-02f, -4.79794466e-02f, 0.00000000e+00f, -6.77901327e-02f, -3.03448665e-02f, 0.00000000e+00f, 1.65948192e-01f, 0.00000000e+00f }, - { 5.00000000e-02f, -8.09016994e-02f, -3.09016994e-02f, 0.00000000e+00f, 0.00000000e+00f, 6.45497224e-02f, -3.45491503e-02f, 0.00000000e+00f, -8.44966837e-02f, 4.79794466e-02f, 0.00000000e+00f, 6.77901327e-02f, -3.03448665e-02f, 0.00000000e+00f, 1.65948192e-01f, 0.00000000e+00f }, - { 5.00000000e-02f, -8.09016994e-02f, 3.09016994e-02f, 0.00000000e+00f, 0.00000000e+00f, -6.45497224e-02f, -3.45491503e-02f, 0.00000000e+00f, -8.44966837e-02f, 4.79794466e-02f, 0.00000000e+00f, 6.77901327e-02f, 3.03448665e-02f, 0.00000000e+00f, -1.65948192e-01f, 0.00000000e+00f }, - { 5.00000000e-02f, 0.00000000e+00f, 8.09016994e-02f, 3.09016994e-02f, 0.00000000e+00f, 0.00000000e+00f, 9.04508497e-02f, 6.45497224e-02f, 1.23279000e-02f, 0.00000000e+00f, 0.00000000e+00f, 0.00000000e+00f, 7.94438918e-02f, 1.12611206e-01f, -2.42115150e-02f, 1.25611822e-01f }, - { 5.00000000e-02f, 0.00000000e+00f, -8.09016994e-02f, 3.09016994e-02f, 0.00000000e+00f, 0.00000000e+00f, 9.04508497e-02f, -6.45497224e-02f, 1.23279000e-02f, 0.00000000e+00f, 0.00000000e+00f, 0.00000000e+00f, -7.94438918e-02f, 1.12611206e-01f, 2.42115150e-02f, 1.25611822e-01f }, - { 5.00000000e-02f, 0.00000000e+00f, -8.09016994e-02f, -3.09016994e-02f, 0.00000000e+00f, 0.00000000e+00f, 9.04508497e-02f, 6.45497224e-02f, 1.23279000e-02f, 0.00000000e+00f, 0.00000000e+00f, 0.00000000e+00f, -7.94438918e-02f, -1.12611206e-01f, 2.42115150e-02f, -1.25611822e-01f }, - { 5.00000000e-02f, 0.00000000e+00f, 8.09016994e-02f, -3.09016994e-02f, 0.00000000e+00f, 0.00000000e+00f, 9.04508497e-02f, -6.45497224e-02f, 1.23279000e-02f, 0.00000000e+00f, 0.00000000e+00f, 0.00000000e+00f, 7.94438918e-02f, -1.12611206e-01f, -2.42115150e-02f, -1.25611822e-01f } - }; - static constexpr ALfloat AmbiOrderHFGain1O[MAX_AMBI_ORDER+1]{ - 3.16227766e+00f, 1.82574186e+00f - }, AmbiOrderHFGain2O[MAX_AMBI_ORDER+1]{ - 2.35702260e+00f, 1.82574186e+00f, 9.42809042e-01f - }, AmbiOrderHFGain3O[MAX_AMBI_ORDER+1]{ - 1.86508671e+00f, 1.60609389e+00f, 1.14205530e+00f, 5.68379553e-01f - }; - static constexpr ALuint ChansPerOrder[MAX_AMBI_ORDER+1]{ 1, 3, 5, 7 }; - const ALfloat *AmbiOrderHFGain{AmbiOrderHFGain1O}; - - static_assert(al::size(AmbiPoints) == al::size(AmbiMatrix), "Ambisonic HRTF mismatch"); - - /* Don't bother with HOA when using full HRTF rendering. Nothing needs it, - * and it eases the CPU/memory load. - */ - device->mRenderMode = HrtfRender; - ALsizei ambi_order{1}; - if(auto modeopt = ConfigValueStr(device->DeviceName.c_str(), nullptr, "hrtf-mode")) - { - const char *mode{modeopt->c_str()}; - if(strcasecmp(mode, "basic") == 0) - { - ERR("HRTF mode \"%s\" deprecated, substituting \"%s\"\n", mode, "ambi2"); - mode = "ambi2"; - } - - if(strcasecmp(mode, "full") == 0) - device->mRenderMode = HrtfRender; - else if(strcasecmp(mode, "ambi1") == 0) - { - device->mRenderMode = NormalRender; - ambi_order = 1; - } - else if(strcasecmp(mode, "ambi2") == 0) - { - device->mRenderMode = NormalRender; - ambi_order = 2; - } - else if(strcasecmp(mode, "ambi3") == 0) - { - device->mRenderMode = NormalRender; - ambi_order = 3; - } - else - ERR("Unexpected hrtf-mode: %s\n", mode); - } - TRACE("%s HRTF rendering enabled, using \"%s\"\n", - (device->mRenderMode == HrtfRender) ? "Full" : - (ambi_order >= 3) ? "Third-Order" : - (ambi_order == 2) ? "Second-Order" : - (ambi_order == 1) ? "First-Order" : "Unknown", - device->HrtfName.c_str()); - - if(ambi_order >= 3) - AmbiOrderHFGain = AmbiOrderHFGain3O; - else if(ambi_order == 2) - AmbiOrderHFGain = AmbiOrderHFGain2O; - else if(ambi_order == 1) - AmbiOrderHFGain = AmbiOrderHFGain1O; - device->mAmbiOrder = ambi_order; - - const size_t count{AmbiChannelsFromOrder(ambi_order)}; - device->mHrtfState = DirectHrtfState::Create(count); - - std::transform(AmbiIndex::From3D.begin(), AmbiIndex::From3D.begin()+count, - std::begin(device->Dry.AmbiMap), - [](const ALsizei &index) noexcept { return BFChannelConfig{1.0f, index}; } - ); - AllocChannels(device, static_cast<ALuint>(count), device->channelsFromFmt()); - - BuildBFormatHrtf(device->mHrtf, device->mHrtfState.get(), static_cast<ALuint>(count), - AmbiPoints, AmbiMatrix, al::size(AmbiPoints), AmbiOrderHFGain); - - HrtfEntry *Hrtf{device->mHrtf}; - InitNearFieldCtrl(device, Hrtf->field[0].distance, ambi_order, ChansPerOrder); -} - -void InitUhjPanning(ALCdevice *device) -{ - /* UHJ is always 2D first-order. */ - static constexpr size_t count{Ambi2DChannelsFromOrder(1)}; - - device->mAmbiOrder = 1; - - auto acnmap_end = AmbiIndex::FromFuMa.begin() + count; - std::transform(AmbiIndex::FromFuMa.begin(), acnmap_end, std::begin(device->Dry.AmbiMap), - [](const ALsizei &acn) noexcept -> BFChannelConfig - { return BFChannelConfig{1.0f/AmbiScale::FromFuMa[acn], acn}; } - ); - AllocChannels(device, ALuint{count}, device->channelsFromFmt()); -} - -} // namespace - -void aluInitRenderer(ALCdevice *device, ALint hrtf_id, HrtfRequestMode hrtf_appreq, HrtfRequestMode hrtf_userreq) -{ - /* Hold the HRTF the device last used, in case it's used again. */ - HrtfEntry *old_hrtf{device->mHrtf}; - - device->mHrtfState = nullptr; - device->mHrtf = nullptr; - device->HrtfName.clear(); - device->mRenderMode = NormalRender; - - if(device->FmtChans != DevFmtStereo) - { - if(old_hrtf) - old_hrtf->DecRef(); - old_hrtf = nullptr; - if(hrtf_appreq == Hrtf_Enable) - device->HrtfStatus = ALC_HRTF_UNSUPPORTED_FORMAT_SOFT; - - const char *layout{nullptr}; - switch(device->FmtChans) - { - case DevFmtQuad: layout = "quad"; break; - case DevFmtX51: /* fall-through */ - case DevFmtX51Rear: layout = "surround51"; break; - case DevFmtX61: layout = "surround61"; break; - case DevFmtX71: layout = "surround71"; break; - /* Mono, Stereo, and Ambisonics output don't use custom decoders. */ - case DevFmtMono: - case DevFmtStereo: - case DevFmtAmbi3D: - break; - } - - const char *devname{device->DeviceName.c_str()}; - ALsizei speakermap[MAX_OUTPUT_CHANNELS]; - AmbDecConf *pconf{nullptr}; - AmbDecConf conf{}; - if(layout) - { - if(auto decopt = ConfigValueStr(devname, "decoder", layout)) - { - if(!conf.load(decopt->c_str())) - ERR("Failed to load layout file %s\n", decopt->c_str()); - else if(conf.Speakers.size() > MAX_OUTPUT_CHANNELS) - ERR("Unsupported speaker count %zu (max %d)\n", conf.Speakers.size(), - MAX_OUTPUT_CHANNELS); - else if(conf.ChanMask > AMBI_3ORDER_MASK) - ERR("Unsupported channel mask 0x%04x (max 0x%x)\n", conf.ChanMask, - AMBI_3ORDER_MASK); - else if(MakeSpeakerMap(device, &conf, speakermap)) - pconf = &conf; - } - } - - if(!pconf) - InitPanning(device); - else - { - int hqdec{GetConfigValueBool(devname, "decoder", "hq-mode", 0)}; - InitCustomPanning(device, !!hqdec, pconf, speakermap); - } - if(device->AmbiDecoder) - device->PostProcess = ProcessAmbiDec; - return; - } - - bool headphones{device->IsHeadphones != AL_FALSE}; - if(device->Type != Loopback) - { - if(auto modeopt = ConfigValueStr(device->DeviceName.c_str(), nullptr, "stereo-mode")) - { - const char *mode{modeopt->c_str()}; - if(strcasecmp(mode, "headphones") == 0) - headphones = true; - else if(strcasecmp(mode, "speakers") == 0) - headphones = false; - else if(strcasecmp(mode, "auto") != 0) - ERR("Unexpected stereo-mode: %s\n", mode); - } - } - - if(hrtf_userreq == Hrtf_Default) - { - bool usehrtf = (headphones && hrtf_appreq != Hrtf_Disable) || - (hrtf_appreq == Hrtf_Enable); - if(!usehrtf) goto no_hrtf; - - device->HrtfStatus = ALC_HRTF_ENABLED_SOFT; - if(headphones && hrtf_appreq != Hrtf_Disable) - device->HrtfStatus = ALC_HRTF_HEADPHONES_DETECTED_SOFT; - } - else - { - if(hrtf_userreq != Hrtf_Enable) - { - if(hrtf_appreq == Hrtf_Enable) - device->HrtfStatus = ALC_HRTF_DENIED_SOFT; - goto no_hrtf; - } - device->HrtfStatus = ALC_HRTF_REQUIRED_SOFT; - } - - if(device->HrtfList.empty()) - device->HrtfList = EnumerateHrtf(device->DeviceName.c_str()); - - if(hrtf_id >= 0 && static_cast<size_t>(hrtf_id) < device->HrtfList.size()) - { - const EnumeratedHrtf &entry = device->HrtfList[hrtf_id]; - HrtfEntry *hrtf{GetLoadedHrtf(entry.hrtf)}; - if(hrtf && hrtf->sampleRate == device->Frequency) - { - device->mHrtf = hrtf; - device->HrtfName = entry.name; - } - else if(hrtf) - hrtf->DecRef(); - } - - if(!device->mHrtf) - { - auto find_hrtf = [device](const EnumeratedHrtf &entry) -> bool - { - HrtfEntry *hrtf{GetLoadedHrtf(entry.hrtf)}; - if(!hrtf) return false; - if(hrtf->sampleRate != device->Frequency) - { - hrtf->DecRef(); - return false; - } - device->mHrtf = hrtf; - device->HrtfName = entry.name; - return true; - }; - std::find_if(device->HrtfList.cbegin(), device->HrtfList.cend(), find_hrtf); - } - - if(device->mHrtf) - { - if(old_hrtf) - old_hrtf->DecRef(); - old_hrtf = nullptr; - - InitHrtfPanning(device); - device->PostProcess = ProcessHrtf; - return; - } - device->HrtfStatus = ALC_HRTF_UNSUPPORTED_FORMAT_SOFT; - -no_hrtf: - if(old_hrtf) - old_hrtf->DecRef(); - old_hrtf = nullptr; - - device->mRenderMode = StereoPair; - - if(device->Type != Loopback) - { - if(auto cflevopt = ConfigValueInt(device->DeviceName.c_str(), nullptr, "cf_level")) - { - if(*cflevopt > 0 && *cflevopt <= 6) - { - device->Bs2b = al::make_unique<bs2b>(); - bs2b_set_params(device->Bs2b.get(), *cflevopt, device->Frequency); - TRACE("BS2B enabled\n"); - InitPanning(device); - device->PostProcess = ProcessBs2b; - return; - } - } - } - - if(auto encopt = ConfigValueStr(device->DeviceName.c_str(), nullptr, "stereo-encoding")) - { - const char *mode{encopt->c_str()}; - if(strcasecmp(mode, "uhj") == 0) - device->mRenderMode = NormalRender; - else if(strcasecmp(mode, "panpot") != 0) - ERR("Unexpected stereo-encoding: %s\n", mode); - } - if(device->mRenderMode == NormalRender) - { - device->Uhj_Encoder = al::make_unique<Uhj2Encoder>(); - TRACE("UHJ enabled\n"); - InitUhjPanning(device); - device->PostProcess = ProcessUhj; - return; - } - - TRACE("Stereo rendering\n"); - InitPanning(device); - device->PostProcess = ProcessAmbiDec; -} - - -void aluInitEffectPanning(ALeffectslot *slot, ALCdevice *device) -{ - const size_t count{AmbiChannelsFromOrder(device->mAmbiOrder)}; - slot->MixBuffer.resize(count); - slot->MixBuffer.shrink_to_fit(); - - auto acnmap_end = AmbiIndex::From3D.begin() + count; - auto iter = std::transform(AmbiIndex::From3D.begin(), acnmap_end, slot->Wet.AmbiMap.begin(), - [](const ALsizei &acn) noexcept -> BFChannelConfig - { return BFChannelConfig{1.0f, acn}; } - ); - std::fill(iter, slot->Wet.AmbiMap.end(), BFChannelConfig{}); - slot->Wet.Buffer = {slot->MixBuffer.data(), slot->MixBuffer.size()}; -} - - -void CalcAmbiCoeffs(const ALfloat y, const ALfloat z, const ALfloat x, const ALfloat spread, - ALfloat (&coeffs)[MAX_AMBI_CHANNELS]) -{ - /* Zeroth-order */ - coeffs[0] = 1.0f; /* ACN 0 = 1 */ - /* First-order */ - coeffs[1] = 1.732050808f * y; /* ACN 1 = sqrt(3) * Y */ - coeffs[2] = 1.732050808f * z; /* ACN 2 = sqrt(3) * Z */ - coeffs[3] = 1.732050808f * x; /* ACN 3 = sqrt(3) * X */ - /* Second-order */ - coeffs[4] = 3.872983346f * x * y; /* ACN 4 = sqrt(15) * X * Y */ - coeffs[5] = 3.872983346f * y * z; /* ACN 5 = sqrt(15) * Y * Z */ - coeffs[6] = 1.118033989f * (z*z*3.0f - 1.0f); /* ACN 6 = sqrt(5)/2 * (3*Z*Z - 1) */ - coeffs[7] = 3.872983346f * x * z; /* ACN 7 = sqrt(15) * X * Z */ - coeffs[8] = 1.936491673f * (x*x - y*y); /* ACN 8 = sqrt(15)/2 * (X*X - Y*Y) */ - /* Third-order */ - coeffs[9] = 2.091650066f * y * (x*x*3.0f - y*y); /* ACN 9 = sqrt(35/8) * Y * (3*X*X - Y*Y) */ - coeffs[10] = 10.246950766f * z * x * y; /* ACN 10 = sqrt(105) * Z * X * Y */ - coeffs[11] = 1.620185175f * y * (z*z*5.0f - 1.0f); /* ACN 11 = sqrt(21/8) * Y * (5*Z*Z - 1) */ - coeffs[12] = 1.322875656f * z * (z*z*5.0f - 3.0f); /* ACN 12 = sqrt(7)/2 * Z * (5*Z*Z - 3) */ - coeffs[13] = 1.620185175f * x * (z*z*5.0f - 1.0f); /* ACN 13 = sqrt(21/8) * X * (5*Z*Z - 1) */ - coeffs[14] = 5.123475383f * z * (x*x - y*y); /* ACN 14 = sqrt(105)/2 * Z * (X*X - Y*Y) */ - coeffs[15] = 2.091650066f * x * (x*x - y*y*3.0f); /* ACN 15 = sqrt(35/8) * X * (X*X - 3*Y*Y) */ - /* Fourth-order */ - /* ACN 16 = sqrt(35)*3/2 * X * Y * (X*X - Y*Y) */ - /* ACN 17 = sqrt(35/2)*3/2 * (3*X*X - Y*Y) * Y * Z */ - /* ACN 18 = sqrt(5)*3/2 * X * Y * (7*Z*Z - 1) */ - /* ACN 19 = sqrt(5/2)*3/2 * Y * Z * (7*Z*Z - 3) */ - /* ACN 20 = 3/8 * (35*Z*Z*Z*Z - 30*Z*Z + 3) */ - /* ACN 21 = sqrt(5/2)*3/2 * X * Z * (7*Z*Z - 3) */ - /* ACN 22 = sqrt(5)*3/4 * (X*X - Y*Y) * (7*Z*Z - 1) */ - /* ACN 23 = sqrt(35/2)*3/2 * (X*X - 3*Y*Y) * X * Z */ - /* ACN 24 = sqrt(35)*3/8 * (X*X*X*X - 6*X*X*Y*Y + Y*Y*Y*Y) */ - - if(spread > 0.0f) - { - /* Implement the spread by using a spherical source that subtends the - * angle spread. See: - * http://www.ppsloan.org/publications/StupidSH36.pdf - Appendix A3 - * - * When adjusted for N3D normalization instead of SN3D, these - * calculations are: - * - * ZH0 = -sqrt(pi) * (-1+ca); - * ZH1 = 0.5*sqrt(pi) * sa*sa; - * ZH2 = -0.5*sqrt(pi) * ca*(-1+ca)*(ca+1); - * ZH3 = -0.125*sqrt(pi) * (-1+ca)*(ca+1)*(5*ca*ca - 1); - * ZH4 = -0.125*sqrt(pi) * ca*(-1+ca)*(ca+1)*(7*ca*ca - 3); - * ZH5 = -0.0625*sqrt(pi) * (-1+ca)*(ca+1)*(21*ca*ca*ca*ca - 14*ca*ca + 1); - * - * The gain of the source is compensated for size, so that the - * loudness doesn't depend on the spread. Thus: - * - * ZH0 = 1.0f; - * ZH1 = 0.5f * (ca+1.0f); - * ZH2 = 0.5f * (ca+1.0f)*ca; - * ZH3 = 0.125f * (ca+1.0f)*(5.0f*ca*ca - 1.0f); - * ZH4 = 0.125f * (ca+1.0f)*(7.0f*ca*ca - 3.0f)*ca; - * ZH5 = 0.0625f * (ca+1.0f)*(21.0f*ca*ca*ca*ca - 14.0f*ca*ca + 1.0f); - */ - ALfloat ca = std::cos(spread * 0.5f); - /* Increase the source volume by up to +3dB for a full spread. */ - ALfloat scale = std::sqrt(1.0f + spread/al::MathDefs<float>::Tau()); - - ALfloat ZH0_norm = scale; - ALfloat ZH1_norm = 0.5f * (ca+1.f) * scale; - ALfloat ZH2_norm = 0.5f * (ca+1.f)*ca * scale; - ALfloat ZH3_norm = 0.125f * (ca+1.f)*(5.f*ca*ca-1.f) * scale; - - /* Zeroth-order */ - coeffs[0] *= ZH0_norm; - /* First-order */ - coeffs[1] *= ZH1_norm; - coeffs[2] *= ZH1_norm; - coeffs[3] *= ZH1_norm; - /* Second-order */ - coeffs[4] *= ZH2_norm; - coeffs[5] *= ZH2_norm; - coeffs[6] *= ZH2_norm; - coeffs[7] *= ZH2_norm; - coeffs[8] *= ZH2_norm; - /* Third-order */ - coeffs[9] *= ZH3_norm; - coeffs[10] *= ZH3_norm; - coeffs[11] *= ZH3_norm; - coeffs[12] *= ZH3_norm; - coeffs[13] *= ZH3_norm; - coeffs[14] *= ZH3_norm; - coeffs[15] *= ZH3_norm; - } -} - -void ComputePanGains(const MixParams *mix, const ALfloat *RESTRICT coeffs, ALfloat ingain, ALfloat (&gains)[MAX_OUTPUT_CHANNELS]) -{ - auto ambimap = mix->AmbiMap.cbegin(); - - auto iter = std::transform(ambimap, ambimap+mix->Buffer.size(), std::begin(gains), - [coeffs,ingain](const BFChannelConfig &chanmap) noexcept -> ALfloat - { - ASSUME(chanmap.Index >= 0); - return chanmap.Scale * coeffs[chanmap.Index] * ingain; - } - ); - std::fill(iter, std::end(gains), 0.0f); -} |