BufferedInvocation.cpp

/******************************************************************************
* Copyright (c) 2011, Michael P. Gerlek (mpg@flaxen.com)
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#include <pdal/plang/BufferedInvocation.hpp>

#ifdef PDAL_COMPILER_MSVC
#  pragma warning(disable: 4127)  // conditional expression is constant
#  pragma warning(disable: 4505)  // unreferenced local function has been removed
#endif

using namespace pdal;

namespace pdal
{
namespace plang
{


BufferedInvocation::BufferedInvocation(const Script& script)
    : Invocation(script)
{
    return;
}


void BufferedInvocation::begin(PointBuffer& buffer)
{
    PointContext ctx = buffer.m_context;
    Dimension::IdList const& dims = ctx.dims();

    for (auto di = dims.begin(); di != dims.end(); ++di)
    {
        Dimension::Id::Enum d = *di;
        Dimension::Detail *dd = ctx.dimDetail(d);
        void *data = malloc(dd->size() * buffer.size());
        m_buffers.push_back(data);  // Hold pointer for deallocation
        char *p = (char *)data;
        for (PointId idx = 0; idx < buffer.size(); ++idx)
        {
            buffer.getFieldInternal(d, idx, (void *)p);
            p += dd->size();
        }
        std::string name = ctx.dimName(*di);
        insertArgument(name, (uint8_t *)data, dd->type(), buffer.size());
    }
}


void BufferedInvocation::end(PointBuffer& buffer)
{
    // for each entry in the script's outs dictionary,
    // look up that entry's name in the schema and then
    // copy the data into the right dimension spot in the
    // buffer

    std::vector<std::string> names;
    getOutputNames(names);

    // const Schema& schema = buffer.getSchema();

    for (size_t i = 0; i < names.size(); i++)
    {
        PointContext ctx = buffer.m_context;
        Dimension::Id::Enum d = ctx.findDim(names[i]);
        if (d == Dimension::Id::Unknown)
            continue;

        Dimension::Detail *dd = ctx.dimDetail(d);
        std::string name = Dimension::name(d);
        assert(name == names[i]);
        assert(hasOutputVariable(name));

        size_t size = dd->size();
        void *data = extractResult(name, dd->type());
        char *p = (char *)data;
        for (PointId idx = 0; idx < buffer.size(); ++idx)
        {
            buffer.setField(d, dd->type(), idx, (void *)p);
            p += size;
        }
    }
    for (auto bi = m_buffers.begin(); bi != m_buffers.end(); ++bi)
        free(*bi);
    m_buffers.clear();
}

} //namespace plang
} //namespace pdal