Writer.hpp

/******************************************************************************
* Copyright (c) 2011, Michael P. Gerlek (mpg@flaxen.com)
*
* All rights reserved.
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*       with the distribution.
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*       names of its contributors may be used to endorse or promote
*       products derived from this software without specific prior
*       written permission.
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#pragma once

#include <pdal/Writer.hpp>
#include <pdal/drivers/las/Header.hpp>
#include <pdal/drivers/las/SummaryData.hpp>
#include <pdal/drivers/las/ZipPoint.hpp>

namespace pdal
{
namespace drivers
{

namespace nitf
{
    class NitfWriter;
}

namespace las
{

class GeotiffSupport;

struct VlrOptionInfo
{
    std::string m_name;
    std::string m_value;
    std::string m_userId;
    uint16_t m_recordId;
    std::string m_description;
};

class PDAL_DLL Writer : public pdal::Writer
{
    friend class nitf::NitfWriter;
public:
    SET_STAGE_NAME("drivers.las.writer", "Las Writer")
    SET_STAGE_LINK("http://pdal.io/stages/drivers.las.writer.html")
    SET_STAGE_ENABLED(true)

    Writer() : m_ostream(NULL)
         { construct(); }
    Writer(std::ostream *stream) : m_ostream(stream)
        { construct(); }

    static Options getDefaultOptions();

    void flush();

private:
    LasHeader m_lasHeader;
    boost::uint32_t m_numPointsWritten;
    SummaryData m_summaryData;
    std::unique_ptr<LASzipper> m_zipper;
    std::unique_ptr<ZipPoint> m_zipPoint;
    bool m_discardHighReturnNumbers;
    std::map<std::string, std::string> m_headerVals;
    std::vector<VlrOptionInfo> m_optionInfos;
    uint64_t m_streamOffset; // the first byte of the LAS file
    std::ostream *m_ostream;
    std::vector<VariableLengthRecord> m_vlrs;
    std::vector<ExtVariableLengthRecord> m_eVlrs;

    virtual void processOptions(const Options& options);
    virtual void ready(PointContextRef ctx);
    virtual void write(const PointBuffer& pointBuffer);
    virtual void done(PointContextRef ctx);

    void construct();
    void getHeaderOptions(const Options& options);
    void getVlrOptions(const Options& opts);
    template<typename T>
    T headerVal(const std::string& name);
    void fillHeader(PointContextRef ctx);
    void setVlrsFromMetadata();
    MetadataNode findVlrMetadata(MetadataNode node, uint16_t recordId,
        const std::string& userId);
    void setVlrsFromSpatialRef(const SpatialReference& srs);
    void setAutoOffset(const PointBuffer& buffer);
    void readyCompression();
    void openCompression();
    void addVlr(const std::string& userId, uint16_t recordId,
        const std::string& description, std::vector<uint8_t>& data);
    bool addGeotiffVlr(GeotiffSupport& geotiff, uint16_t recordId,
        const std::string& description);
    bool addWktVlr(const SpatialReference& srs);

    Writer& operator=(const Writer&); // not implemented
    Writer(const Writer&); // not implemented
};

} // namespace las
} // namespace drivers
} // namespace pdal