supercell-wx/wxdata/source/scwx/wsr88d/rda/digital_radar_data.cpp

#include <scwx/wsr88d/rda/digital_radar_data.hpp>
#include <scwx/util/logger.hpp>

namespace scwx
{
namespace wsr88d
{
namespace rda
{

static const std::string logPrefix_ = "scwx::wsr88d::rda::digital_radar_data";
static const auto        logger_    = util::Logger::Create(logPrefix_);

static const std::unordered_map<std::string, DataBlockType> strToDataBlock_ {
   {"VOL", DataBlockType::Volume},
   {"ELV", DataBlockType::Elevation},
   {"RAD", DataBlockType::Radial},
   {"REF", DataBlockType::MomentRef},
   {"VEL", DataBlockType::MomentVel},
   {"SW ", DataBlockType::MomentSw},
   {"ZDR", DataBlockType::MomentZdr},
   {"PHI", DataBlockType::MomentPhi},
   {"RHO", DataBlockType::MomentRho},
   {"CFP", DataBlockType::MomentCfp}};

class DataBlockImpl
{
public:
   explicit DataBlockImpl(const std::string& dataBlockType,
                          const std::string& dataName) :
       dataBlockType_ {dataBlockType}, dataName_ {dataName}
   {
   }

   std::string dataBlockType_;
   std::string dataName_;
};

DataBlock::DataBlock(const std::string& dataBlockType,
                     const std::string& dataName) :
    p(std::make_unique<DataBlockImpl>(dataBlockType, dataName))
{
}
DataBlock::~DataBlock() = default;

DataBlock::DataBlock(DataBlock&&) noexcept            = default;
DataBlock& DataBlock::operator=(DataBlock&&) noexcept = default;

class MomentDataBlockImpl
{
public:
   explicit MomentDataBlockImpl() :
       numberOfDataMomentGates_ {0},
       dataMomentRange_ {0},
       dataMomentRangeSampleInterval_ {0},
       tover_ {0},
       snrThreshold_ {0},
       controlFlags_ {0},
       dataWordSize_ {0},
       scale_ {0.0f},
       offset_ {0.0f}
   {
   }

   uint16_t numberOfDataMomentGates_;
   uint16_t dataMomentRange_;
   uint16_t dataMomentRangeSampleInterval_;
   uint16_t tover_;
   int16_t  snrThreshold_;
   uint8_t  controlFlags_;
   uint8_t  dataWordSize_;
   float    scale_;
   float    offset_;

   std::vector<uint8_t>  momentGates8_;
   std::vector<uint16_t> momentGates16_;
};

MomentDataBlock::MomentDataBlock(const std::string& dataBlockType,
                                 const std::string& dataName) :
    DataBlock(dataBlockType, dataName),
    p(std::make_unique<MomentDataBlockImpl>())
{
}
MomentDataBlock::~MomentDataBlock() = default;

MomentDataBlock::MomentDataBlock(MomentDataBlock&&) noexcept = default;
MomentDataBlock&
MomentDataBlock::operator=(MomentDataBlock&&) noexcept = default;

uint16_t MomentDataBlock::number_of_data_moment_gates() const
{
   return p->numberOfDataMomentGates_;
}

float MomentDataBlock::data_moment_range() const
{
   return p->dataMomentRange_ * 0.001f;
}

uint16_t MomentDataBlock::data_moment_range_raw() const
{
   return p->dataMomentRange_;
}

float MomentDataBlock::data_moment_range_sample_interval() const
{
   return p->dataMomentRangeSampleInterval_ * 0.001f;
}

uint16_t MomentDataBlock::data_moment_range_sample_interval_raw() const
{
   return p->dataMomentRangeSampleInterval_;
}

float MomentDataBlock::snr_threshold() const
{
   return p->snrThreshold_ * 0.1f;
}

int16_t MomentDataBlock::snr_threshold_raw() const
{
   return p->snrThreshold_;
}

uint8_t MomentDataBlock::data_word_size() const
{
   return p->dataWordSize_;
}

float MomentDataBlock::scale() const
{
   return p->scale_;
}

float MomentDataBlock::offset() const
{
   return p->offset_;
}

const void* MomentDataBlock::data_moments() const
{
   const void* dataMoments;

   switch (p->dataWordSize_)
   {
   case 8:
      dataMoments = p->momentGates8_.data();
      break;
   case 16:
      dataMoments = p->momentGates16_.data();
      break;
   default:
      dataMoments = nullptr;
      break;
   }

   return dataMoments;
}

std::shared_ptr<MomentDataBlock>
MomentDataBlock::Create(const std::string& dataBlockType,
                        const std::string& dataName,
                        std::istream&      is)
{
   std::shared_ptr<MomentDataBlock> p =
      std::make_shared<MomentDataBlock>(dataBlockType, dataName);

   if (!p->Parse(is))
   {
      p.reset();
   }

   return p;
}

bool MomentDataBlock::Parse(std::istream& is)
{
   bool dataBlockValid = true;

   is.seekg(4, std::ios_base::cur);                                   // 4-7
   is.read(reinterpret_cast<char*>(&p->numberOfDataMomentGates_), 2); // 8-9
   is.read(reinterpret_cast<char*>(&p->dataMomentRange_), 2);         // 10-11
   is.read(reinterpret_cast<char*>(&p->dataMomentRangeSampleInterval_),
           2);                                             // 12-13
   is.read(reinterpret_cast<char*>(&p->tover_), 2);        // 14-15
   is.read(reinterpret_cast<char*>(&p->snrThreshold_), 2); // 16-17
   is.read(reinterpret_cast<char*>(&p->controlFlags_), 1); // 18
   is.read(reinterpret_cast<char*>(&p->dataWordSize_), 1); // 19
   is.read(reinterpret_cast<char*>(&p->scale_), 4);        // 20-23
   is.read(reinterpret_cast<char*>(&p->offset_), 4);       // 24-27

   p->numberOfDataMomentGates_       = ntohs(p->numberOfDataMomentGates_);
   p->dataMomentRange_               = ntohs(p->dataMomentRange_);
   p->dataMomentRangeSampleInterval_ = ntohs(p->dataMomentRangeSampleInterval_);
   p->tover_                         = ntohs(p->tover_);
   p->snrThreshold_                  = ntohs(p->snrThreshold_);
   p->scale_                         = awips::Message::SwapFloat(p->scale_);
   p->offset_                        = awips::Message::SwapFloat(p->offset_);

   if (p->numberOfDataMomentGates_ <= 1840)
   {
      if (p->dataWordSize_ == 8)
      {
         p->momentGates8_.resize(p->numberOfDataMomentGates_);
         is.read(reinterpret_cast<char*>(p->momentGates8_.data()),
                 p->numberOfDataMomentGates_);
      }
      else if (p->dataWordSize_ == 16)
      {
         p->momentGates16_.resize(p->numberOfDataMomentGates_);
         is.read(reinterpret_cast<char*>(p->momentGates16_.data()),
                 p->numberOfDataMomentGates_ * 2);
         awips::Message::SwapVector(p->momentGates16_);
      }
      else
      {
         logger_->warn("Invalid data word size: {}", p->dataWordSize_);
         dataBlockValid = false;
      }
   }
   else
   {
      logger_->warn("Invalid number of data moment gates: {}",
                    p->numberOfDataMomentGates_);
      dataBlockValid = false;
   }

   return dataBlockValid;
}

class VolumeDataBlockImpl
{
public:
   explicit VolumeDataBlockImpl() :
       lrtup_ {0},
       versionNumberMajor_ {0},
       versionNumberMinor_ {0},
       latitude_ {0.0f},
       longitude_ {0.0f},
       siteHeight_ {0},
       feedhornHeight_ {0},
       calibrationConstant_ {0.0f},
       horizontaShvTxPower_ {0.0f},
       verticalShvTxPower_ {0.0f},
       systemDifferentialReflectivity_ {0.0f},
       initialSystemDifferentialPhase_ {0.0f},
       volumeCoveragePatternNumber_ {0},
       processingStatus_ {0}
   {
   }

   uint16_t lrtup_;
   uint8_t  versionNumberMajor_;
   uint8_t  versionNumberMinor_;
   float    latitude_;
   float    longitude_;
   int16_t  siteHeight_;
   uint16_t feedhornHeight_;
   float    calibrationConstant_;
   float    horizontaShvTxPower_;
   float    verticalShvTxPower_;
   float    systemDifferentialReflectivity_;
   float    initialSystemDifferentialPhase_;
   uint16_t volumeCoveragePatternNumber_;
   uint16_t processingStatus_;
};

VolumeDataBlock::VolumeDataBlock(const std::string& dataBlockType,
                                 const std::string& dataName) :
    DataBlock(dataBlockType, dataName),
    p(std::make_unique<VolumeDataBlockImpl>())
{
}
VolumeDataBlock::~VolumeDataBlock() = default;

VolumeDataBlock::VolumeDataBlock(VolumeDataBlock&&) noexcept = default;
VolumeDataBlock&
VolumeDataBlock::operator=(VolumeDataBlock&&) noexcept = default;

float VolumeDataBlock::latitude() const
{
   return p->latitude_;
}

float VolumeDataBlock::longitude() const
{
   return p->longitude_;
}

uint16_t VolumeDataBlock::volume_coverage_pattern_number() const
{
   return p->volumeCoveragePatternNumber_;
}

std::shared_ptr<VolumeDataBlock>
VolumeDataBlock::Create(const std::string& dataBlockType,
                        const std::string& dataName,
                        std::istream&      is)
{
   std::shared_ptr<VolumeDataBlock> p =
      std::make_shared<VolumeDataBlock>(dataBlockType, dataName);

   if (!p->Parse(is))
   {
      p.reset();
   }

   return p;
}

bool VolumeDataBlock::Parse(std::istream& is)
{
   bool dataBlockValid = true;

   is.read(reinterpret_cast<char*>(&p->lrtup_), 2);               // 4-5
   is.read(reinterpret_cast<char*>(&p->versionNumberMajor_), 1);  // 6
   is.read(reinterpret_cast<char*>(&p->versionNumberMinor_), 1);  // 7
   is.read(reinterpret_cast<char*>(&p->latitude_), 4);            // 8-11
   is.read(reinterpret_cast<char*>(&p->longitude_), 4);           // 12-15
   is.read(reinterpret_cast<char*>(&p->siteHeight_), 2);          // 16-17
   is.read(reinterpret_cast<char*>(&p->feedhornHeight_), 2);      // 18-19
   is.read(reinterpret_cast<char*>(&p->calibrationConstant_), 4); // 20-23
   is.read(reinterpret_cast<char*>(&p->horizontaShvTxPower_), 4); // 24-27
   is.read(reinterpret_cast<char*>(&p->verticalShvTxPower_), 4);  // 28-31
   is.read(reinterpret_cast<char*>(&p->systemDifferentialReflectivity_),
           4); // 32-35
   is.read(reinterpret_cast<char*>(&p->initialSystemDifferentialPhase_),
           4); // 36-39
   is.read(reinterpret_cast<char*>(&p->volumeCoveragePatternNumber_),
           2);                                                 // 40-41
   is.read(reinterpret_cast<char*>(&p->processingStatus_), 2); // 42-43

   p->lrtup_               = ntohs(p->lrtup_);
   p->latitude_            = awips::Message::SwapFloat(p->latitude_);
   p->longitude_           = awips::Message::SwapFloat(p->longitude_);
   p->siteHeight_          = ntohs(p->siteHeight_);
   p->feedhornHeight_      = ntohs(p->feedhornHeight_);
   p->calibrationConstant_ = awips::Message::SwapFloat(p->calibrationConstant_);
   p->horizontaShvTxPower_ = awips::Message::SwapFloat(p->horizontaShvTxPower_);
   p->verticalShvTxPower_  = awips::Message::SwapFloat(p->verticalShvTxPower_);
   p->systemDifferentialReflectivity_ =
      awips::Message::SwapFloat(p->systemDifferentialReflectivity_);
   p->initialSystemDifferentialPhase_ =
      awips::Message::SwapFloat(p->initialSystemDifferentialPhase_);
   p->volumeCoveragePatternNumber_ = ntohs(p->volumeCoveragePatternNumber_);
   p->processingStatus_            = ntohs(p->processingStatus_);

   return dataBlockValid;
}

class ElevationDataBlockImpl
{
public:
   explicit ElevationDataBlockImpl() :
       lrtup_ {0}, atmos_ {0}, calibrationConstant_ {0.0f}
   {
   }

   uint16_t lrtup_;
   int16_t  atmos_;
   float    calibrationConstant_;
};

ElevationDataBlock::ElevationDataBlock(const std::string& dataBlockType,
                                       const std::string& dataName) :
    DataBlock(dataBlockType, dataName),
    p(std::make_unique<ElevationDataBlockImpl>())
{
}
ElevationDataBlock::~ElevationDataBlock() = default;

ElevationDataBlock::ElevationDataBlock(ElevationDataBlock&&) noexcept = default;
ElevationDataBlock&
ElevationDataBlock::operator=(ElevationDataBlock&&) noexcept = default;

std::shared_ptr<ElevationDataBlock>
ElevationDataBlock::Create(const std::string& dataBlockType,
                           const std::string& dataName,
                           std::istream&      is)
{
   std::shared_ptr<ElevationDataBlock> p =
      std::make_shared<ElevationDataBlock>(dataBlockType, dataName);

   if (!p->Parse(is))
   {
      p.reset();
   }

   return p;
}

bool ElevationDataBlock::Parse(std::istream& is)
{
   bool dataBlockValid = true;

   is.read(reinterpret_cast<char*>(&p->lrtup_), 2);               // 4-5
   is.read(reinterpret_cast<char*>(&p->atmos_), 2);               // 6-7
   is.read(reinterpret_cast<char*>(&p->calibrationConstant_), 4); // 8-11

   p->lrtup_               = ntohs(p->lrtup_);
   p->atmos_               = ntohs(p->atmos_);
   p->calibrationConstant_ = awips::Message::SwapFloat(p->calibrationConstant_);

   return dataBlockValid;
}

class RadialDataBlockImpl
{
public:
   explicit RadialDataBlockImpl() :
       lrtup_ {0},
       unambigiousRange_ {0},
       noiseLevelHorizontal_ {0.0f},
       noiseLevelVertical_ {0.0f},
       nyquistVelocity_ {0},
       radialFlags_ {0},
       calibrationConstantHorizontal_ {0.0f},
       calibrationConstantVertical_ {0.0f}
   {
   }

   uint16_t lrtup_;
   uint16_t unambigiousRange_;
   float    noiseLevelHorizontal_;
   float    noiseLevelVertical_;
   uint16_t nyquistVelocity_;
   uint16_t radialFlags_;
   float    calibrationConstantHorizontal_;
   float    calibrationConstantVertical_;
};

RadialDataBlock::RadialDataBlock(const std::string& dataBlockType,
                                 const std::string& dataName) :
    DataBlock(dataBlockType, dataName),
    p(std::make_unique<RadialDataBlockImpl>())
{
}
RadialDataBlock::~RadialDataBlock() = default;

RadialDataBlock::RadialDataBlock(RadialDataBlock&&) noexcept = default;
RadialDataBlock&
RadialDataBlock::operator=(RadialDataBlock&&) noexcept = default;

float RadialDataBlock::unambiguous_range() const
{
   return p->unambigiousRange_ / 10.0f;
}

std::shared_ptr<RadialDataBlock>
RadialDataBlock::Create(const std::string& dataBlockType,
                        const std::string& dataName,
                        std::istream&      is)
{
   std::shared_ptr<RadialDataBlock> p =
      std::make_shared<RadialDataBlock>(dataBlockType, dataName);

   if (!p->Parse(is))
   {
      p.reset();
   }

   return p;
}

bool RadialDataBlock::Parse(std::istream& is)
{
   bool dataBlockValid = true;

   is.read(reinterpret_cast<char*>(&p->lrtup_), 2);                // 4-5
   is.read(reinterpret_cast<char*>(&p->unambigiousRange_), 2);     // 6-7
   is.read(reinterpret_cast<char*>(&p->noiseLevelHorizontal_), 4); // 8-11
   is.read(reinterpret_cast<char*>(&p->noiseLevelVertical_), 4);   // 12-15
   is.read(reinterpret_cast<char*>(&p->nyquistVelocity_), 2);      // 16-17
   is.read(reinterpret_cast<char*>(&p->radialFlags_), 2);          // 18-19
   is.read(reinterpret_cast<char*>(&p->calibrationConstantHorizontal_),
           4); // 20-23
   is.read(reinterpret_cast<char*>(&p->calibrationConstantVertical_),
           4); // 24-27

   p->lrtup_            = ntohs(p->lrtup_);
   p->unambigiousRange_ = ntohs(p->unambigiousRange_);
   p->noiseLevelHorizontal_ =
      awips::Message::SwapFloat(p->noiseLevelHorizontal_);
   p->noiseLevelVertical_ = awips::Message::SwapFloat(p->noiseLevelVertical_);
   p->nyquistVelocity_    = ntohs(p->nyquistVelocity_);
   p->radialFlags_        = ntohs(p->radialFlags_);
   p->calibrationConstantHorizontal_ =
      awips::Message::SwapFloat(p->calibrationConstantHorizontal_);
   p->calibrationConstantVertical_ =
      awips::Message::SwapFloat(p->calibrationConstantVertical_);

   return dataBlockValid;
}

class DigitalRadarDataImpl
{
public:
   explicit DigitalRadarDataImpl() :
       radarIdentifier_ {},
       collectionTime_ {0},
       modifiedJulianDate_ {0},
       azimuthNumber_ {0},
       azimuthAngle_ {0.0f},
       compressionIndicator_ {0},
       radialLength_ {0},
       azimuthResolutionSpacing_ {0},
       radialStatus_ {0},
       elevationNumber_ {0},
       cutSectorNumber_ {0},
       elevationAngle_ {0.0f},
       radialSpotBlankingStatus_ {0},
       azimuthIndexingMode_ {0},
       dataBlockCount_ {0},
       dataBlockPointer_ {0},
       volumeDataBlock_ {nullptr},
       elevationDataBlock_ {nullptr},
       radialDataBlock_ {nullptr},
       momentDataBlock_ {} {};
   ~DigitalRadarDataImpl() = default;

   std::string              radarIdentifier_;
   uint32_t                 collectionTime_;
   uint16_t                 modifiedJulianDate_;
   uint16_t                 azimuthNumber_;
   float                    azimuthAngle_;
   uint8_t                  compressionIndicator_;
   uint16_t                 radialLength_;
   uint8_t                  azimuthResolutionSpacing_;
   uint8_t                  radialStatus_;
   uint8_t                  elevationNumber_;
   uint8_t                  cutSectorNumber_;
   float                    elevationAngle_;
   uint8_t                  radialSpotBlankingStatus_;
   uint8_t                  azimuthIndexingMode_;
   uint16_t                 dataBlockCount_;
   std::array<uint32_t, 10> dataBlockPointer_;

   std::shared_ptr<VolumeDataBlock>    volumeDataBlock_;
   std::shared_ptr<ElevationDataBlock> elevationDataBlock_;
   std::shared_ptr<RadialDataBlock>    radialDataBlock_;
   std::unordered_map<DataBlockType, std::shared_ptr<MomentDataBlock>>
      momentDataBlock_;
};

DigitalRadarData::DigitalRadarData() :
    Level2Message(), p(std::make_unique<DigitalRadarDataImpl>())
{
}
DigitalRadarData::~DigitalRadarData() = default;

DigitalRadarData::DigitalRadarData(DigitalRadarData&&) noexcept = default;
DigitalRadarData&
DigitalRadarData::operator=(DigitalRadarData&&) noexcept = default;

std::string DigitalRadarData::radar_identifier() const
{
   return p->radarIdentifier_;
}

uint32_t DigitalRadarData::collection_time() const
{
   return p->collectionTime_;
}

uint16_t DigitalRadarData::modified_julian_date() const
{
   return p->modifiedJulianDate_;
}

uint16_t DigitalRadarData::azimuth_number() const
{
   return p->azimuthNumber_;
}

float DigitalRadarData::azimuth_angle() const
{
   return p->azimuthAngle_;
}

uint8_t DigitalRadarData::compression_indicator() const
{
   return p->compressionIndicator_;
}

uint16_t DigitalRadarData::radial_length() const
{
   return p->radialLength_;
}

uint8_t DigitalRadarData::azimuth_resolution_spacing() const
{
   return p->azimuthResolutionSpacing_;
}

uint8_t DigitalRadarData::radial_status() const
{
   return p->radialStatus_;
}

uint8_t DigitalRadarData::elevation_number() const
{
   return p->elevationNumber_;
}

uint8_t DigitalRadarData::cut_sector_number() const
{
   return p->cutSectorNumber_;
}

float DigitalRadarData::elevation_angle() const
{
   return p->elevationAngle_;
}

uint8_t DigitalRadarData::radial_spot_blanking_status() const
{
   return p->radialSpotBlankingStatus_;
}

uint8_t DigitalRadarData::azimuth_indexing_mode() const
{
   return p->azimuthIndexingMode_;
}

uint16_t DigitalRadarData::data_block_count() const
{
   return p->dataBlockCount_;
}

std::shared_ptr<ElevationDataBlock>
DigitalRadarData::elevation_data_block() const
{
   return p->elevationDataBlock_;
}

std::shared_ptr<RadialDataBlock> DigitalRadarData::radial_data_block() const
{
   return p->radialDataBlock_;
}

std::shared_ptr<VolumeDataBlock> DigitalRadarData::volume_data_block() const
{
   return p->volumeDataBlock_;
}

std::shared_ptr<MomentDataBlock>
DigitalRadarData::moment_data_block(DataBlockType type) const
{
   std::shared_ptr<MomentDataBlock> momentDataBlock = nullptr;

   auto it = p->momentDataBlock_.find(type);
   if (it != p->momentDataBlock_.end())
   {
      momentDataBlock = it->second;
   }

   return momentDataBlock;
}

bool DigitalRadarData::Parse(std::istream& is)
{
   logger_->trace("Parsing Digital Radar Data (Message Type 31)");

   bool   messageValid = true;
   size_t bytesRead    = 0;

   std::streampos isBegin = is.tellg();

   p->radarIdentifier_.resize(4);

   is.read(&p->radarIdentifier_[0], 4);                                // 0-3
   is.read(reinterpret_cast<char*>(&p->collectionTime_), 4);           // 4-7
   is.read(reinterpret_cast<char*>(&p->modifiedJulianDate_), 2);       // 8-9
   is.read(reinterpret_cast<char*>(&p->azimuthNumber_), 2);            // 10-11
   is.read(reinterpret_cast<char*>(&p->azimuthAngle_), 4);             // 12-15
   is.read(reinterpret_cast<char*>(&p->compressionIndicator_), 1);     // 16
   is.seekg(1, std::ios_base::cur);                                    // 17
   is.read(reinterpret_cast<char*>(&p->radialLength_), 2);             // 18-19
   is.read(reinterpret_cast<char*>(&p->azimuthResolutionSpacing_), 1); // 20
   is.read(reinterpret_cast<char*>(&p->radialStatus_), 1);             // 21
   is.read(reinterpret_cast<char*>(&p->elevationNumber_), 1);          // 22
   is.read(reinterpret_cast<char*>(&p->cutSectorNumber_), 1);          // 23
   is.read(reinterpret_cast<char*>(&p->elevationAngle_), 4);           // 24-27
   is.read(reinterpret_cast<char*>(&p->radialSpotBlankingStatus_), 1); // 28
   is.read(reinterpret_cast<char*>(&p->azimuthIndexingMode_), 1);      // 29
   is.read(reinterpret_cast<char*>(&p->dataBlockCount_), 2);           // 30-31

   p->collectionTime_     = ntohl(p->collectionTime_);
   p->modifiedJulianDate_ = ntohs(p->modifiedJulianDate_);
   p->azimuthNumber_      = ntohs(p->azimuthNumber_);
   p->azimuthAngle_       = SwapFloat(p->azimuthAngle_);
   p->radialLength_       = ntohs(p->radialLength_);
   p->elevationAngle_     = SwapFloat(p->elevationAngle_);
   p->dataBlockCount_     = ntohs(p->dataBlockCount_);

   if (p->azimuthNumber_ < 1 || p->azimuthNumber_ > 720)
   {
      logger_->warn("Invalid azimuth number: {}", p->azimuthNumber_);
      messageValid = false;
   }
   if (p->elevationNumber_ < 1 || p->elevationNumber_ > 32)
   {
      logger_->warn("Invalid elevation number: ", p->elevationNumber_);
      messageValid = false;
   }
   if (p->dataBlockCount_ < 4 || p->dataBlockCount_ > 10)
   {
      logger_->warn("Invalid number of data blocks: {}", p->dataBlockCount_);
      messageValid = false;
   }
   if (p->compressionIndicator_ != 0)
   {
      logger_->warn("Compression not supported");
      messageValid = false;
   }

   if (!messageValid)
   {
      p->dataBlockCount_ = 0;
   }

   is.read(reinterpret_cast<char*>(&p->dataBlockPointer_),
           p->dataBlockCount_ * 4);

   SwapArray(p->dataBlockPointer_, p->dataBlockCount_);

   for (uint16_t b = 0; b < p->dataBlockCount_; ++b)
   {
      is.seekg(isBegin + std::streamoff(p->dataBlockPointer_[b]),
               std::ios_base::beg);

      std::string dataBlockType(1, 0);
      std::string dataName(3, 0);

      is.read(&dataBlockType[0], 1);
      is.read(&dataName[0], 3);

      DataBlockType dataBlock = DataBlockType::Unknown;
      try
      {
         dataBlock = strToDataBlock_.at(dataName);
      }
      catch (const std::exception&)
      {
      }

      switch (dataBlock)
      {
      case DataBlockType::Volume:
         p->volumeDataBlock_ =
            std::move(VolumeDataBlock::Create(dataBlockType, dataName, is));
         break;
      case DataBlockType::Elevation:
         p->elevationDataBlock_ =
            std::move(ElevationDataBlock::Create(dataBlockType, dataName, is));
         break;
      case DataBlockType::Radial:
         p->radialDataBlock_ =
            std::move(RadialDataBlock::Create(dataBlockType, dataName, is));
         break;
      case DataBlockType::MomentRef:
      case DataBlockType::MomentVel:
      case DataBlockType::MomentSw:
      case DataBlockType::MomentZdr:
      case DataBlockType::MomentPhi:
      case DataBlockType::MomentRho:
      case DataBlockType::MomentCfp:
         p->momentDataBlock_[dataBlock] =
            std::move(MomentDataBlock::Create(dataBlockType, dataName, is));
         break;
      default:
         logger_->warn("Unknown data name: {}", dataName);
         break;
      }
   }

   is.seekg(isBegin, std::ios_base::beg);
   if (!ValidateMessage(is, bytesRead))
   {
      messageValid = false;
   }

   return messageValid;
}

std::shared_ptr<DigitalRadarData>
DigitalRadarData::Create(Level2MessageHeader&& header, std::istream& is)
{
   std::shared_ptr<DigitalRadarData> message =
      std::make_shared<DigitalRadarData>();
   message->set_header(std::move(header));

   if (!message->Parse(is))
   {
      message.reset();
   }

   return message;
}

} // namespace rda
} // namespace wsr88d
} // namespace scwx