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qgspdalprovider.cpp
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qgspdalprovider.cpp
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/***************************************************************************
qgspdaldataprovider.cpp
-----------------------
Date : November 2020
Copyright : (C) 2020 by Peter Petrik
Email : zilolv at gmail dot com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgis.h"
#include "qgspdalprovider.h"
#include "qgspdaldataitems.h"
#include "qgsruntimeprofiler.h"
#include "qgsapplication.h"
#include "qgslogger.h"
#include "qgsmessagelog.h"
#include "qgsjsonutils.h"
#include "qgspdaleptgenerationtask.h"
#include "qgseptpointcloudindex.h"
#include "qgstaskmanager.h"
#include <pdal/io/LasReader.hpp>
#include <pdal/io/LasHeader.hpp>
#include <pdal/Options.hpp>
#define PROVIDER_KEY QStringLiteral( "pdal" )
#define PROVIDER_DESCRIPTION QStringLiteral( "PDAL point cloud data provider" )
QQueue<QgsPdalProvider *> QgsPdalProvider::sIndexingQueue;
QgsPdalProvider::QgsPdalProvider(
const QString &uri,
const QgsDataProvider::ProviderOptions &options,
QgsDataProvider::ReadFlags flags )
: QgsPointCloudDataProvider( uri, options, flags )
, mIndex( new QgsEptPointCloudIndex )
{
std::unique_ptr< QgsScopedRuntimeProfile > profile;
if ( QgsApplication::profiler()->groupIsActive( QStringLiteral( "projectload" ) ) )
profile = std::make_unique< QgsScopedRuntimeProfile >( tr( "Open data source" ), QStringLiteral( "projectload" ) );
mIsValid = load( uri );
loadIndex( );
}
QgsPdalProvider::~QgsPdalProvider() = default;
QgsCoordinateReferenceSystem QgsPdalProvider::crs() const
{
return mCrs;
}
QgsRectangle QgsPdalProvider::extent() const
{
return mExtent;
}
QgsPointCloudAttributeCollection QgsPdalProvider::attributes() const
{
return mIndex->attributes();
}
QVariantList QgsPdalProvider::metadataClasses( const QString &attribute ) const
{
return mIndex->metadataClasses( attribute );
}
QVariant QgsPdalProvider::metadataClassStatistic( const QString &attribute, const QVariant &value, QgsStatisticalSummary::Statistic statistic ) const
{
return mIndex->metadataClassStatistic( attribute, value, statistic );
}
static QString _outdir( const QString &filename )
{
const QFileInfo fi( filename );
const QDir directory = fi.absoluteDir();
const QString outputDir = QStringLiteral( "%1/ept_%2" ).arg( directory.absolutePath() ).arg( fi.baseName() );
return outputDir;
}
void QgsPdalProvider::generateIndex()
{
if ( mRunningIndexingTask || mIndex->isValid() )
return;
if ( anyIndexingTaskExists() )
{
sIndexingQueue.push_back( this );
return;
}
const QString outputDir = _outdir( dataSourceUri() );
QgsPdalEptGenerationTask *generationTask = new QgsPdalEptGenerationTask( dataSourceUri(), outputDir, QFileInfo( dataSourceUri() ).fileName() );
connect( generationTask, &QgsPdalEptGenerationTask::taskTerminated, this, &QgsPdalProvider::onGenerateIndexFailed );
connect( generationTask, &QgsPdalEptGenerationTask::taskCompleted, this, &QgsPdalProvider::onGenerateIndexFinished );
mRunningIndexingTask = generationTask;
QgsDebugMsgLevel( "Ept Generation Task Created", 2 );
emit indexGenerationStateChanged( PointCloudIndexGenerationState::Indexing );
QgsApplication::taskManager()->addTask( generationTask );
}
QgsPointCloudDataProvider::PointCloudIndexGenerationState QgsPdalProvider::indexingState()
{
if ( mIndex->isValid() )
return PointCloudIndexGenerationState::Indexed;
else if ( mRunningIndexingTask )
return PointCloudIndexGenerationState::Indexing;
else
return PointCloudIndexGenerationState::NotIndexed;
}
void QgsPdalProvider::loadIndex( )
{
if ( mIndex->isValid() )
return;
const QString outputDir = _outdir( dataSourceUri() );
QString outEptJson = QStringLiteral( "%1/ept.json" ).arg( outputDir );
QFileInfo fi( outEptJson );
if ( fi.isFile() )
{
mIndex->load( outEptJson );
}
else
{
QgsDebugMsgLevel( QStringLiteral( "pdalprovider: ept index %1 is not correctly loaded" ).arg( outEptJson ), 2 );
}
}
void QgsPdalProvider::onGenerateIndexFinished()
{
QgsPdalEptGenerationTask *task = qobject_cast<QgsPdalEptGenerationTask *>( QObject::sender() );
// this may be already canceled task that we don't care anymore...
if ( task == mRunningIndexingTask )
{
mRunningIndexingTask = nullptr;
emit indexGenerationStateChanged( PointCloudIndexGenerationState::Indexed );
}
if ( !sIndexingQueue.empty() )
sIndexingQueue.takeFirst()->generateIndex();
}
void QgsPdalProvider::onGenerateIndexFailed()
{
QgsPdalEptGenerationTask *task = qobject_cast<QgsPdalEptGenerationTask *>( QObject::sender() );
// this may be already canceled task that we don't care anymore...
if ( task == mRunningIndexingTask )
{
mRunningIndexingTask = nullptr;
emit indexGenerationStateChanged( PointCloudIndexGenerationState::NotIndexed );
}
if ( !sIndexingQueue.empty() )
sIndexingQueue.takeFirst()->generateIndex();
}
bool QgsPdalProvider::anyIndexingTaskExists()
{
const QList< QgsTask * > tasks = QgsApplication::taskManager()->activeTasks();
for ( const QgsTask *task : tasks )
{
const QgsPdalEptGenerationTask *eptTask = qobject_cast<const QgsPdalEptGenerationTask *>( task );
if ( eptTask )
{
return true;
}
}
return false;
}
QVariant QgsPdalProvider::metadataStatistic( const QString &attribute, QgsStatisticalSummary::Statistic statistic ) const
{
if ( mIndex )
return mIndex->metadataStatistic( attribute, statistic );
else
return QVariant();
}
int QgsPdalProvider::pointCount() const
{
return mPointCount;
}
QVariantMap QgsPdalProvider::originalMetadata() const
{
return mOriginalMetadata;
}
bool QgsPdalProvider::isValid() const
{
return mIsValid;
}
QString QgsPdalProvider::name() const
{
return QStringLiteral( "pdal" );
}
QString QgsPdalProvider::description() const
{
return QStringLiteral( "Point Clouds PDAL" );
}
QgsPointCloudIndex *QgsPdalProvider::index() const
{
return mIndex.get();
}
bool QgsPdalProvider::load( const QString &uri )
{
try
{
pdal::Option las_opt( "filename", uri.toStdString() );
pdal::Options las_opts;
las_opts.add( las_opt );
pdal::LasReader las_reader;
las_reader.setOptions( las_opts );
pdal::PointTable table;
las_reader.prepare( table );
pdal::LasHeader las_header = las_reader.header();
const std::string tableMetadata = pdal::Utils::toJSON( table.metadata() );
const QVariantMap readerMetadata = QgsJsonUtils::parseJson( tableMetadata ).toMap().value( QStringLiteral( "root" ) ).toMap();
// source metadata is only value present here!
if ( !readerMetadata.empty() )
mOriginalMetadata = readerMetadata.constBegin().value().toMap();
// extent
/*
double scale_x = las_header.scaleX();
double scale_y = las_header.scaleY();
double scale_z = las_header.scaleZ();
double offset_x = las_header.offsetX();
double offset_y = las_header.offsetY();
double offset_z = las_header.offsetZ();
*/
double xmin = las_header.minX();
double xmax = las_header.maxX();
double ymin = las_header.minY();
double ymax = las_header.maxY();
mExtent = QgsRectangle( xmin, ymin, xmax, ymax );
mPointCount = las_header.pointCount();
// projection
QString wkt = QString::fromStdString( las_reader.getSpatialReference().getWKT() );
mCrs = QgsCoordinateReferenceSystem::fromWkt( wkt );
return true;
}
catch ( pdal::pdal_error &error )
{
QgsDebugMsg( QStringLiteral( "Error loading PDAL data source %1" ).arg( error.what() ) );
QgsMessageLog::logMessage( tr( "Data source is invalid (%1)" ).arg( error.what() ), QStringLiteral( "PDAL" ) );
return false;
}
}
QgsPdalProviderMetadata::QgsPdalProviderMetadata():
QgsProviderMetadata( PROVIDER_KEY, PROVIDER_DESCRIPTION )
{
}
QgsPdalProvider *QgsPdalProviderMetadata::createProvider( const QString &uri, const QgsDataProvider::ProviderOptions &options, QgsDataProvider::ReadFlags flags )
{
return new QgsPdalProvider( uri, options, flags );
}
QgsProviderMetadata::ProviderMetadataCapabilities QgsPdalProviderMetadata::capabilities() const
{
return ProviderMetadataCapability::LayerTypesForUri
| ProviderMetadataCapability::PriorityForUri;
}
QList<QgsDataItemProvider *> QgsPdalProviderMetadata::dataItemProviders() const
{
QList< QgsDataItemProvider * > providers;
providers << new QgsPdalDataItemProvider;
return providers;
}
QVariantMap QgsPdalProviderMetadata::decodeUri( const QString &uri ) const
{
const QString path = uri;
QVariantMap uriComponents;
uriComponents.insert( QStringLiteral( "path" ), path );
return uriComponents;
}
int QgsPdalProviderMetadata::priorityForUri( const QString &uri ) const
{
const QVariantMap parts = decodeUri( uri );
QFileInfo fi( parts.value( QStringLiteral( "path" ) ).toString() );
if ( fi.suffix().compare( QLatin1String( "las" ), Qt::CaseInsensitive ) == 0 || fi.suffix().compare( QLatin1String( "laz" ), Qt::CaseInsensitive ) == 0 )
return 100;
return 0;
}
QList<QgsMapLayerType> QgsPdalProviderMetadata::validLayerTypesForUri( const QString &uri ) const
{
const QVariantMap parts = decodeUri( uri );
QFileInfo fi( parts.value( QStringLiteral( "path" ) ).toString() );
if ( fi.suffix().compare( QLatin1String( "las" ), Qt::CaseInsensitive ) == 0 || fi.suffix().compare( QLatin1String( "laz" ), Qt::CaseInsensitive ) == 0 )
return QList<QgsMapLayerType>() << QgsMapLayerType::PointCloudLayer;
return QList<QgsMapLayerType>();
}
QString QgsPdalProviderMetadata::filters( QgsProviderMetadata::FilterType type )
{
switch ( type )
{
case QgsProviderMetadata::FilterType::FilterVector:
case QgsProviderMetadata::FilterType::FilterRaster:
case QgsProviderMetadata::FilterType::FilterMesh:
case QgsProviderMetadata::FilterType::FilterMeshDataset:
return QString();
case QgsProviderMetadata::FilterType::FilterPointCloud:
// TODO get the available/supported filters from PDAL library
return QObject::tr( "PDAL Point Clouds" ) + QStringLiteral( " (*.laz *.las)" );
}
return QString();
}
QString QgsPdalProviderMetadata::encodeUri( const QVariantMap &parts ) const
{
const QString path = parts.value( QStringLiteral( "path" ) ).toString();
return path;
}
QGISEXTERN QgsProviderMetadata *providerMetadataFactory()
{
return new QgsPdalProviderMetadata();
}