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/******************************************************************************
* Copyright (c) 2014, Connor Manning, connor@hobu.co
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Hobu, Inc. or Flaxen Geo Consulting nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
****************************************************************************/
#include "IcebridgeReader.hpp"
#include <pdal/util/FileUtils.hpp>
#include <pdal/PointView.hpp>
#include <pdal/util/ProgramArgs.hpp>
#include <map>
namespace
{
const std::vector<pdal::hdf5::Hdf5ColumnData> hdf5Columns =
{
{ "instrument_parameters/time_hhmmss", H5::PredType::NATIVE_FLOAT },
{ "latitude", H5::PredType::NATIVE_FLOAT },
{ "longitude", H5::PredType::NATIVE_FLOAT },
{ "elevation", H5::PredType::NATIVE_FLOAT },
{ "instrument_parameters/xmt_sigstr", H5::PredType::NATIVE_INT },
{ "instrument_parameters/rcv_sigstr", H5::PredType::NATIVE_INT },
{ "instrument_parameters/azimuth", H5::PredType::NATIVE_FLOAT },
{ "instrument_parameters/pitch", H5::PredType::NATIVE_FLOAT },
{ "instrument_parameters/roll", H5::PredType::NATIVE_FLOAT },
{ "instrument_parameters/gps_pdop", H5::PredType::NATIVE_FLOAT },
{ "instrument_parameters/pulse_width", H5::PredType::NATIVE_FLOAT },
{ "instrument_parameters/rel_time", H5::PredType::NATIVE_FLOAT }
};
}
namespace pdal
{
static PluginInfo const s_info
{
"readers.icebridge",
"NASA HDF5-based IceBridge ATM reader. \n" \
"See http://nsidc.org/data/docs/daac/icebridge/ilatm1b/index.html \n" \
"for more information.",
"http://pdal.io/stages/readers.icebridge.html"
};
CREATE_SHARED_STAGE(IcebridgeReader, s_info)
std::string IcebridgeReader::getName() const { return s_info.name; }
namespace
{
Dimension::IdList dimensions()
{
using namespace Dimension;
return IdList { Id::OffsetTime, Id::Y, Id::X, Id::Z, Id::StartPulse,
Id::ReflectedPulse, Id::Azimuth, Id::Pitch, Id::Roll, Id::Pdop,
Id::PulseWidth, Id::GpsTime };
}
} // unnamed namespace
void IcebridgeReader::addDimensions(PointLayoutPtr layout)
{
layout->registerDims(dimensions());
}
void IcebridgeReader::ready(PointTableRef table)
{
try
{
m_hdf5Handler.initialize(m_filename, hdf5Columns);
}
catch (const Hdf5Handler::error& err)
{
throwError(err.what());
}
m_index = 0;
if (!m_metadataFile.empty())
{
m_mdReader.readMetadataFile(m_metadataFile, &m_metadata);
}
}
point_count_t IcebridgeReader::read(PointViewPtr view, point_count_t count)
{
//All data we read for icebridge is currently 4 bytes wide, so
// just allocate once and forget it.
//This could be a huge allocation. Perhaps we should do something
// in the icebridge handler?
PointId startId = view->size();
point_count_t remaining = m_hdf5Handler.getNumPoints() - m_index;
count = (std::min)(count, remaining);
std::unique_ptr<unsigned char>
rawData(new unsigned char[count * sizeof(float)]);
//Not loving the position-linked data, but fine for now.
Dimension::IdList dims = dimensions();
auto di = dims.begin();
for (auto ci = hdf5Columns.begin(); ci != hdf5Columns.end(); ++ci, ++di)
{
PointId nextId = startId;
PointId idx = m_index;
const hdf5::Hdf5ColumnData& column = *ci;
try
{
m_hdf5Handler.getColumnEntries(rawData.get(), column.name, count,
m_index);
void *p = (void *)rawData.get();
// This is ugly but avoids a test in a tight loop.
if (column.predType == H5::PredType::NATIVE_FLOAT)
{
// Offset time is in ms but icebridge stores in seconds.
if (*di == Dimension::Id::OffsetTime)
{
float *fval = (float *)p;
for (PointId i = 0; i < count; ++i)
{
view->setField(*di, nextId++, *fval * 1000);
fval++;
}
}
else if (*di == Dimension::Id::X)
{
float *fval = (float *)p;
for (PointId i = 0; i < count; ++i)
{
double dval = (double)(*fval);
// Longitude is 0-360. Convert
dval = Utils::normalizeLongitude(dval);
view->setField(*di, nextId++, dval);
fval++;
}
}
else
{
float *fval = (float *)p;
for (PointId i = 0; i < count; ++i)
view->setField(*di, nextId++, *fval++);
}
}
else if (column.predType == H5::PredType::NATIVE_INT)
{
int32_t *ival = (int32_t *)p;
for (PointId i = 0; i < count; ++i)
view->setField(*di, nextId++, *ival++);
}
}
catch(const Hdf5Handler::error& err)
{
throwError(err.what());
}
}
return count;
}
void IcebridgeReader::addArgs(ProgramArgs& args)
{
args.add("metadata", "Metadata file", m_metadataFile);
}
void IcebridgeReader::initialize()
{
if (!m_metadataFile.empty() && !FileUtils::fileExists(m_metadataFile))
{
throwError("Invalid metadata file: '" + m_metadataFile + "'");
}
// Data are WGS84 (4326) with ITRF2000 datum (6656)
// See http://nsidc.org/data/docs/daac/icebridge/ilvis2/index.html for
// background
setSpatialReference("EPSG:4326");
}
void IcebridgeReader::done(PointTableRef table)
{
m_hdf5Handler.close();
}
bool IcebridgeReader::eof()
{
return m_index >= m_hdf5Handler.getNumPoints();
}
} // namespace pdal
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