utils/makemhr/loadsofa.cpp

   1 /*
   2  * HRTF utility for producing and demonstrating the process of creating an
   3  * OpenAL Soft compatible HRIR data set.
   4  *
   5  * Copyright (C) 2018-2019  Christopher Fitzgerald
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Or visit:  http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
  22  */
  23
  24 #include "loadsofa.h"
  25
  26 #include <algorithm>
  27 #include <atomic>
  28 #include <chrono>
  29 #include <cmath>
  30 #include <cstdio>
  31 #include <functional>
  32 #include <future>
  33 #include <iterator>
  34 #include <memory>
  35 #include <numeric>
  36 #include <optional>
  37 #include <string>
  38 #include <thread>
  39 #include <vector>
  40
  41 #include "alspan.h"
  42 #include "alnumeric.h"
  43 #include "makemhr.h"
  44 #include "polyphase_resampler.h"
  45 #include "sofa-support.h"
  46
  47 #include "mysofa.h"
  48
  49
  50 using uint = unsigned int;
  51
  52 /* Attempts to produce a compatible layout.  Most data sets tend to be
  53  * uniform and have the same major axis as used by OpenAL Soft's HRTF model.
  54  * This will remove outliers and produce a maximally dense layout when
  55  * possible.  Those sets that contain purely random measurements or use
  56  * different major axes will fail.
  57  */
  58 static bool PrepareLayout(const uint m, const float *xyzs, HrirDataT *hData)
  59 {
  60     fprintf(stdout, "Detecting compatible layout...\n");
  61
  62     auto fds = GetCompatibleLayout(m, xyzs);
  63     if(fds.size() > MAX_FD_COUNT)
  64     {
  65         fprintf(stdout, "Incompatible layout (inumerable radii).\n");
  66         return false;
  67     }
  68
  69     std::array<double,MAX_FD_COUNT> distances{};
  70     std::array<uint,MAX_FD_COUNT> evCounts{};
  71     auto azCounts = std::vector<std::array<uint,MAX_EV_COUNT>>(MAX_FD_COUNT);
  72     for(auto &azs : azCounts) azs.fill(0u);
  73
  74     uint fi{0u}, ir_total{0u};
  75     for(const auto &field : fds)
  76     {
  77         distances[fi] = field.mDistance;
  78         evCounts[fi] = field.mEvCount;
  79
  80         for(uint ei{0u};ei < field.mEvStart;ei++)
  81             azCounts[fi][ei] = field.mAzCounts[field.mEvCount-ei-1];
  82         for(uint ei{field.mEvStart};ei < field.mEvCount;ei++)
  83         {
  84             azCounts[fi][ei] = field.mAzCounts[ei];
  85             ir_total += field.mAzCounts[ei];
  86         }
  87
  88         ++fi;
  89     }
  90     fprintf(stdout, "Using %u of %u IRs.\n", ir_total, m);
  91     const auto azs = al::span{azCounts}.first<MAX_FD_COUNT>();
  92     return PrepareHrirData(al::span{distances}.first(fi), evCounts, azs, hData);
  93 }
  94
  95
  96 float GetSampleRate(MYSOFA_HRTF *sofaHrtf)
  97 {
  98     const char *srate_dim{nullptr};
  99     const char *srate_units{nullptr};
 100     MYSOFA_ARRAY *srate_array{&sofaHrtf->DataSamplingRate};
 101     MYSOFA_ATTRIBUTE *srate_attrs{srate_array->attributes};
 102     while(srate_attrs)
 103     {
 104         if(std::string{"DIMENSION_LIST"} == srate_attrs->name)
 105         {
 106             if(srate_dim)
 107             {
 108                 fprintf(stderr, "Duplicate SampleRate.DIMENSION_LIST\n");
 109                 return 0.0f;
 110             }
 111             srate_dim = srate_attrs->value;
 112         }
 113         else if(std::string{"Units"} == srate_attrs->name)
 114         {
 115             if(srate_units)
 116             {
 117                 fprintf(stderr, "Duplicate SampleRate.Units\n");
 118                 return 0.0f;
 119             }
 120             srate_units = srate_attrs->value;
 121         }
 122         else
 123             fprintf(stderr, "Unexpected sample rate attribute: %s = %s\n", srate_attrs->name,
 124                 srate_attrs->value);
 125         srate_attrs = srate_attrs->next;
 126     }
 127     if(!srate_dim)
 128     {
 129         fprintf(stderr, "Missing sample rate dimensions\n");
 130         return 0.0f;
 131     }
 132     if(srate_dim != std::string{"I"})
 133     {
 134         fprintf(stderr, "Unsupported sample rate dimensions: %s\n", srate_dim);
 135         return 0.0f;
 136     }
 137     if(!srate_units)
 138     {
 139         fprintf(stderr, "Missing sample rate unit type\n");
 140         return 0.0f;
 141     }
 142     if(srate_units != std::string{"hertz"})
 143     {
 144         fprintf(stderr, "Unsupported sample rate unit type: %s\n", srate_units);
 145         return 0.0f;
 146     }
 147     /* I dimensions guarantees 1 element, so just extract it. */
 148     if(srate_array->values[0] < float{MIN_RATE} || srate_array->values[0] > float{MAX_RATE})
 149     {
 150         fprintf(stderr, "Sample rate out of range: %f (expected %u to %u)", srate_array->values[0],
 151             MIN_RATE, MAX_RATE);
 152         return 0.0f;
 153     }
 154     return srate_array->values[0];
 155 }
 156
 157 enum class DelayType : uint8_t {
 158     None,
 159     I_R, /* [1][Channels] */
 160     M_R, /* [HRIRs][Channels] */
 161     Invalid,
 162 };
 163 DelayType PrepareDelay(MYSOFA_HRTF *sofaHrtf)
 164 {
 165     const char *delay_dim{nullptr};
 166     MYSOFA_ARRAY *delay_array{&sofaHrtf->DataDelay};
 167     MYSOFA_ATTRIBUTE *delay_attrs{delay_array->attributes};
 168     while(delay_attrs)
 169     {
 170         if(std::string{"DIMENSION_LIST"} == delay_attrs->name)
 171         {
 172             if(delay_dim)
 173             {
 174                 fprintf(stderr, "Duplicate Delay.DIMENSION_LIST\n");
 175                 return DelayType::Invalid;
 176             }
 177             delay_dim = delay_attrs->value;
 178         }
 179         else
 180             fprintf(stderr, "Unexpected delay attribute: %s = %s\n", delay_attrs->name,
 181                 delay_attrs->value ? delay_attrs->value : "<null>");
 182         delay_attrs = delay_attrs->next;
 183     }
 184     if(!delay_dim)
 185     {
 186         fprintf(stderr, "Missing delay dimensions\n");
 187         return DelayType::None;
 188     }
 189     if(delay_dim == std::string{"I,R"})
 190         return DelayType::I_R;
 191     if(delay_dim == std::string{"M,R"})
 192         return DelayType::M_R;
 193
 194     fprintf(stderr, "Unsupported delay dimensions: %s\n", delay_dim);
 195     return DelayType::Invalid;
 196 }
 197
 198 bool CheckIrData(MYSOFA_HRTF *sofaHrtf)
 199 {
 200     const char *ir_dim{nullptr};
 201     MYSOFA_ARRAY *ir_array{&sofaHrtf->DataIR};
 202     MYSOFA_ATTRIBUTE *ir_attrs{ir_array->attributes};
 203     while(ir_attrs)
 204     {
 205         if(std::string{"DIMENSION_LIST"} == ir_attrs->name)
 206         {
 207             if(ir_dim)
 208             {
 209                 fprintf(stderr, "Duplicate IR.DIMENSION_LIST\n");
 210                 return false;
 211             }
 212             ir_dim = ir_attrs->value;
 213         }
 214         else
 215             fprintf(stderr, "Unexpected IR attribute: %s = %s\n", ir_attrs->name,
 216                 ir_attrs->value ? ir_attrs->value : "<null>");
 217         ir_attrs = ir_attrs->next;
 218     }
 219     if(!ir_dim)
 220     {
 221         fprintf(stderr, "Missing IR dimensions\n");
 222         return false;
 223     }
 224     if(ir_dim != std::string{"M,R,N"})
 225     {
 226         fprintf(stderr, "Unsupported IR dimensions: %s\n", ir_dim);
 227         return false;
 228     }
 229     return true;
 230 }
 231
 232
 233 /* Calculate the onset time of a HRIR. */
 234 static constexpr int OnsetRateMultiple{10};
 235 static double CalcHrirOnset(PPhaseResampler &rs, const uint rate, const uint n,
 236     al::span<double> upsampled, const double *hrir)
 237 {
 238     rs.process(n, hrir, static_cast<uint>(upsampled.size()), upsampled.data());
 239
 240     auto abs_lt = [](const double &lhs, const double &rhs) -> bool
 241     { return std::abs(lhs) < std::abs(rhs); };
 242     auto iter = std::max_element(upsampled.cbegin(), upsampled.cend(), abs_lt);
 243     return static_cast<double>(std::distance(upsampled.cbegin(), iter)) /
 244         (double{OnsetRateMultiple}*rate);
 245 }
 246
 247 /* Calculate the magnitude response of a HRIR. */
 248 static void CalcHrirMagnitude(const uint points, const uint n, al::span<complex_d> h, double *hrir)
 249 {
 250     auto iter = std::copy_n(hrir, points, h.begin());
 251     std::fill(iter, h.end(), complex_d{0.0, 0.0});
 252
 253     FftForward(n, h.data());
 254     MagnitudeResponse(n, h.data(), hrir);
 255 }
 256
 257 static bool LoadResponses(MYSOFA_HRTF *sofaHrtf, HrirDataT *hData, const DelayType delayType,
 258     const uint outRate)
 259 {
 260     std::atomic<uint> loaded_count{0u};
 261
 262     auto load_proc = [sofaHrtf,hData,delayType,outRate,&loaded_count]() -> bool
 263     {
 264         const uint channels{(hData->mChannelType == CT_STEREO) ? 2u : 1u};
 265         hData->mHrirsBase.resize(channels * size_t{hData->mIrCount} * hData->mIrSize, 0.0);
 266         double *hrirs = hData->mHrirsBase.data();
 267
 268         std::vector<double> restmp;
 269         std::optional<PPhaseResampler> resampler;
 270         if(outRate && outRate != hData->mIrRate)
 271         {
 272             resampler.emplace().init(hData->mIrRate, outRate);
 273             restmp.resize(sofaHrtf->N);
 274         }
 275
 276         for(uint si{0u};si < sofaHrtf->M;++si)
 277         {
 278             loaded_count.fetch_add(1u);
 279
 280             std::array aer{
 281                 sofaHrtf->SourcePosition.values[3_uz*si],
 282                 sofaHrtf->SourcePosition.values[3_uz*si + 1],
 283                 sofaHrtf->SourcePosition.values[3_uz*si + 2]
 284             };
 285             mysofa_c2s(aer.data());
 286
 287             if(std::abs(aer[1]) >= 89.999f)
 288                 aer[0] = 0.0f;
 289             else
 290                 aer[0] = std::fmod(360.0f - aer[0], 360.0f);
 291
 292             auto field = std::find_if(hData->mFds.cbegin(), hData->mFds.cend(),
 293                 [&aer](const HrirFdT &fld) -> bool
 294                 { return (std::abs(aer[2] - fld.mDistance) < 0.001); });
 295             if(field == hData->mFds.cend())
 296                 continue;
 297
 298             const double evscale{180.0 / static_cast<double>(field->mEvs.size()-1)};
 299             double ef{(90.0 + aer[1]) / evscale};
 300             auto ei = static_cast<uint>(std::round(ef));
 301             ef = (ef - ei) * evscale;
 302             if(std::abs(ef) >= 0.1) continue;
 303
 304             const double azscale{360.0 / static_cast<double>(field->mEvs[ei].mAzs.size())};
 305             double af{aer[0] / azscale};
 306             auto ai = static_cast<uint>(std::round(af));
 307             af = (af-ai) * azscale;
 308             ai %= static_cast<uint>(field->mEvs[ei].mAzs.size());
 309             if(std::abs(af) >= 0.1) continue;
 310
 311             HrirAzT *azd = &field->mEvs[ei].mAzs[ai];
 312             if(azd->mIrs[0] != nullptr)
 313             {
 314                 fprintf(stderr, "\nMultiple measurements near [ a=%f, e=%f, r=%f ].\n",
 315                     aer[0], aer[1], aer[2]);
 316                 return false;
 317             }
 318
 319             for(uint ti{0u};ti < channels;++ti)
 320             {
 321                 azd->mIrs[ti] = &hrirs[(size_t{hData->mIrCount}*ti + azd->mIndex)*hData->mIrSize];
 322                 if(!resampler)
 323                     std::copy_n(&sofaHrtf->DataIR.values[(size_t{si}*sofaHrtf->R + ti)*sofaHrtf->N],
 324                         sofaHrtf->N, azd->mIrs[ti]);
 325                 else
 326                 {
 327                     std::copy_n(&sofaHrtf->DataIR.values[(size_t{si}*sofaHrtf->R + ti)*sofaHrtf->N],
 328                         sofaHrtf->N, restmp.data());
 329                     resampler->process(sofaHrtf->N, restmp.data(), hData->mIrSize, azd->mIrs[ti]);
 330                 }
 331             }
 332
 333             /* Include any per-channel or per-HRIR delays. */
 334             if(delayType == DelayType::I_R)
 335             {
 336                 const float *delayValues{sofaHrtf->DataDelay.values};
 337                 for(uint ti{0u};ti < channels;++ti)
 338                     azd->mDelays[ti] = delayValues[ti] / static_cast<float>(hData->mIrRate);
 339             }
 340             else if(delayType == DelayType::M_R)
 341             {
 342                 const float *delayValues{sofaHrtf->DataDelay.values};
 343                 for(uint ti{0u};ti < channels;++ti)
 344                     azd->mDelays[ti] = delayValues[si*sofaHrtf->R + ti] /
 345                         static_cast<float>(hData->mIrRate);
 346             }
 347         }
 348
 349         if(outRate && outRate != hData->mIrRate)
 350         {
 351             const double scale{static_cast<double>(outRate) / hData->mIrRate};
 352             hData->mIrRate = outRate;
 353             hData->mIrPoints = std::min(static_cast<uint>(std::ceil(hData->mIrPoints*scale)),
 354                 hData->mIrSize);
 355         }
 356         return true;
 357     };
 358
 359     std::future_status load_status{};
 360     auto load_future = std::async(std::launch::async, load_proc);
 361     do {
 362         load_status = load_future.wait_for(std::chrono::milliseconds{50});
 363         printf("\rLoading HRIRs... %u of %u", loaded_count.load(), sofaHrtf->M);
 364         fflush(stdout);
 365     } while(load_status != std::future_status::ready);
 366     fputc('\n', stdout);
 367     return load_future.get();
 368 }
 369
 370
 371 /* Calculates the frequency magnitudes of the HRIR set. Work is delegated to
 372  * this struct, which runs asynchronously on one or more threads (sharing the
 373  * same calculator object).
 374  */
 375 struct MagCalculator {
 376     const uint mFftSize{};
 377     const uint mIrPoints{};
 378     std::vector<double*> mIrs{};
 379     std::atomic<size_t> mCurrent{};
 380     std::atomic<size_t> mDone{};
 381
 382     void Worker()
 383     {
 384         auto htemp = std::vector<complex_d>(mFftSize);
 385
 386         while(true)
 387         {
 388             /* Load the current index to process. */
 389             size_t idx{mCurrent.load()};
 390             do {
 391                 /* If the index is at the end, we're done. */
 392                 if(idx >= mIrs.size())
 393                     return;
 394                 /* Otherwise, increment the current index atomically so other
 395                  * threads know to go to the next one. If this call fails, the
 396                  * current index was just changed by another thread and the new
 397                  * value is loaded into idx, which we'll recheck.
 398                  */
 399             } while(!mCurrent.compare_exchange_weak(idx, idx+1, std::memory_order_relaxed));
 400
 401             CalcHrirMagnitude(mIrPoints, mFftSize, htemp, mIrs[idx]);
 402
 403             /* Increment the number of IRs done. */
 404             mDone.fetch_add(1);
 405         }
 406     }
 407 };
 408
 409 bool LoadSofaFile(const char *filename, const uint numThreads, const uint fftSize,
 410     const uint truncSize, const uint outRate, const ChannelModeT chanMode, HrirDataT *hData)
 411 {
 412     int err;
 413     MySofaHrtfPtr sofaHrtf{mysofa_load(filename, &err)};
 414     if(!sofaHrtf)
 415     {
 416         fprintf(stdout, "Error: Could not load %s: %s\n", filename, SofaErrorStr(err));
 417         return false;
 418     }
 419
 420     /* NOTE: Some valid SOFA files are failing this check. */
 421     err = mysofa_check(sofaHrtf.get());
 422     if(err != MYSOFA_OK)
 423         fprintf(stderr, "Warning: Supposedly malformed source file '%s' (%s).\n", filename,
 424             SofaErrorStr(err));
 425
 426     mysofa_tocartesian(sofaHrtf.get());
 427
 428     /* Make sure emitter and receiver counts are sane. */
 429     if(sofaHrtf->E != 1)
 430     {
 431         fprintf(stderr, "%u emitters not supported\n", sofaHrtf->E);
 432         return false;
 433     }
 434     if(sofaHrtf->R > 2 || sofaHrtf->R < 1)
 435     {
 436         fprintf(stderr, "%u receivers not supported\n", sofaHrtf->R);
 437         return false;
 438     }
 439     /* Assume R=2 is a stereo measurement, and R=1 is mono left-ear-only. */
 440     if(sofaHrtf->R == 2 && chanMode == CM_AllowStereo)
 441         hData->mChannelType = CT_STEREO;
 442     else
 443         hData->mChannelType = CT_MONO;
 444
 445     /* Check and set the FFT and IR size. */
 446     if(sofaHrtf->N > fftSize)
 447     {
 448         fprintf(stderr, "Sample points exceeds the FFT size.\n");
 449         return false;
 450     }
 451     if(sofaHrtf->N < truncSize)
 452     {
 453         fprintf(stderr, "Sample points is below the truncation size.\n");
 454         return false;
 455     }
 456     hData->mIrPoints = sofaHrtf->N;
 457     hData->mFftSize = fftSize;
 458     hData->mIrSize = std::max(1u + (fftSize/2u), sofaHrtf->N);
 459
 460     /* Assume a default head radius of 9cm. */
 461     hData->mRadius = 0.09;
 462
 463     hData->mIrRate = static_cast<uint>(std::lround(GetSampleRate(sofaHrtf.get())));
 464     if(!hData->mIrRate)
 465         return false;
 466
 467     DelayType delayType = PrepareDelay(sofaHrtf.get());
 468     if(delayType == DelayType::Invalid)
 469         return false;
 470
 471     if(!CheckIrData(sofaHrtf.get()))
 472         return false;
 473     if(!PrepareLayout(sofaHrtf->M, sofaHrtf->SourcePosition.values, hData))
 474         return false;
 475     if(!LoadResponses(sofaHrtf.get(), hData, delayType, outRate))
 476         return false;
 477     sofaHrtf = nullptr;
 478
 479     for(uint fi{0u};fi < hData->mFds.size();fi++)
 480     {
 481         uint ei{0u};
 482         for(;ei < hData->mFds[fi].mEvs.size();ei++)
 483         {
 484             uint ai{0u};
 485             for(;ai < hData->mFds[fi].mEvs[ei].mAzs.size();ai++)
 486             {
 487                 HrirAzT &azd = hData->mFds[fi].mEvs[ei].mAzs[ai];
 488                 if(azd.mIrs[0] != nullptr) break;
 489             }
 490             if(ai < hData->mFds[fi].mEvs[ei].mAzs.size())
 491                 break;
 492         }
 493         if(ei >= hData->mFds[fi].mEvs.size())
 494         {
 495             fprintf(stderr, "Missing source references [ %d, *, * ].\n", fi);
 496             return false;
 497         }
 498         hData->mFds[fi].mEvStart = ei;
 499         for(;ei < hData->mFds[fi].mEvs.size();ei++)
 500         {
 501             for(uint ai{0u};ai < hData->mFds[fi].mEvs[ei].mAzs.size();ai++)
 502             {
 503                 HrirAzT &azd = hData->mFds[fi].mEvs[ei].mAzs[ai];
 504                 if(azd.mIrs[0] == nullptr)
 505                 {
 506                     fprintf(stderr, "Missing source reference [ %d, %d, %d ].\n", fi, ei, ai);
 507                     return false;
 508                 }
 509             }
 510         }
 511     }
 512
 513
 514     size_t hrir_total{0};
 515     const uint channels{(hData->mChannelType == CT_STEREO) ? 2u : 1u};
 516     double *hrirs = hData->mHrirsBase.data();
 517     for(uint fi{0u};fi < hData->mFds.size();fi++)
 518     {
 519         for(uint ei{0u};ei < hData->mFds[fi].mEvStart;ei++)
 520         {
 521             for(uint ai{0u};ai < hData->mFds[fi].mEvs[ei].mAzs.size();ai++)
 522             {
 523                 HrirAzT &azd = hData->mFds[fi].mEvs[ei].mAzs[ai];
 524                 for(size_t ti{0u};ti < channels;ti++)
 525                     azd.mIrs[ti] = &hrirs[hData->mIrSize * (hData->mIrCount*ti + azd.mIndex)];
 526             }
 527         }
 528
 529         for(uint ei{hData->mFds[fi].mEvStart};ei < hData->mFds[fi].mEvs.size();ei++)
 530             hrir_total += hData->mFds[fi].mEvs[ei].mAzs.size() * channels;
 531     }
 532
 533     std::atomic<size_t> hrir_done{0};
 534     auto onset_proc = [hData,channels,&hrir_done]() -> bool
 535     {
 536         /* Temporary buffer used to calculate the IR's onset. */
 537         auto upsampled = std::vector<double>(size_t{OnsetRateMultiple} * hData->mIrPoints);
 538         /* This resampler is used to help detect the response onset. */
 539         PPhaseResampler rs;
 540         rs.init(hData->mIrRate, OnsetRateMultiple*hData->mIrRate);
 541
 542         for(auto &field : hData->mFds)
 543         {
 544             for(auto &elev : field.mEvs.subspan(field.mEvStart))
 545             {
 546                 for(auto &azd : elev.mAzs)
 547                 {
 548                     for(uint ti{0};ti < channels;ti++)
 549                     {
 550                         hrir_done.fetch_add(1u, std::memory_order_acq_rel);
 551                         azd.mDelays[ti] += CalcHrirOnset(rs, hData->mIrRate, hData->mIrPoints,
 552                             upsampled, azd.mIrs[ti]);
 553                     }
 554                 }
 555             }
 556         }
 557         return true;
 558     };
 559
 560     std::future_status load_status{};
 561     auto load_future = std::async(std::launch::async, onset_proc);
 562     do {
 563         load_status = load_future.wait_for(std::chrono::milliseconds{50});
 564         printf("\rCalculating HRIR onsets... %zu of %zu", hrir_done.load(), hrir_total);
 565         fflush(stdout);
 566     } while(load_status != std::future_status::ready);
 567     fputc('\n', stdout);
 568     if(!load_future.get())
 569         return false;
 570
 571     MagCalculator calculator{hData->mFftSize, hData->mIrPoints};
 572     for(auto &field : hData->mFds)
 573     {
 574         for(auto &elev : field.mEvs.subspan(field.mEvStart))
 575         {
 576             for(auto &azd : elev.mAzs)
 577             {
 578                 for(uint ti{0};ti < channels;ti++)
 579                     calculator.mIrs.push_back(azd.mIrs[ti]);
 580             }
 581         }
 582     }
 583
 584     std::vector<std::thread> thrds;
 585     thrds.reserve(numThreads);
 586     for(size_t i{0};i < numThreads;++i)
 587         thrds.emplace_back(std::mem_fn(&MagCalculator::Worker), &calculator);
 588     size_t count;
 589     do {
 590         std::this_thread::sleep_for(std::chrono::milliseconds{50});
 591         count = calculator.mDone.load();
 592
 593         printf("\rCalculating HRIR magnitudes... %zu of %zu", count, calculator.mIrs.size());
 594         fflush(stdout);
 595     } while(count != calculator.mIrs.size());
 596     fputc('\n', stdout);
 597
 598     for(auto &thrd : thrds)
 599     {
 600         if(thrd.joinable())
 601             thrd.join();
 602     }
 603     return true;
 604 }