Method createAndInitModelsAndCompressors

src/laswriteitemcompressed_v4.cpp:217–373

}

inline BOOL LASwriteItemCompressed_POINT14_v4::createAndInitModelsAndCompressors(U32 context, const U8* item)
{
  I32 i;

  /* should only be called when context is unused */

  assert(contexts[context].unused);

  /* first create all entropy models and integer compressors (if needed) */

  if (contexts[context].m_changed_values[0] == 0)
  {
    /* for the channel_returns_XY layer */

    contexts[context].m_changed_values[0] = enc_channel_returns_XY->createSymbolModel(128);
    contexts[context].m_changed_values[1] = enc_channel_returns_XY->createSymbolModel(128);
    contexts[context].m_changed_values[2] = enc_channel_returns_XY->createSymbolModel(128);
    contexts[context].m_changed_values[3] = enc_channel_returns_XY->createSymbolModel(128);
    contexts[context].m_changed_values[4] = enc_channel_returns_XY->createSymbolModel(128);
    contexts[context].m_changed_values[5] = enc_channel_returns_XY->createSymbolModel(128);
    contexts[context].m_changed_values[6] = enc_channel_returns_XY->createSymbolModel(128);
    contexts[context].m_changed_values[7] = enc_channel_returns_XY->createSymbolModel(128);
    contexts[context].m_scanner_channel = enc_channel_returns_XY->createSymbolModel(3);
    for (i = 0; i < 16; i++)
    {
      contexts[context].m_number_of_returns[i] = 0;
      contexts[context].m_return_number[i] = 0;
    }
    contexts[context].m_return_number_gps_same = enc_channel_returns_XY->createSymbolModel(13);

    contexts[context].ic_dX = new IntegerCompressor(enc_channel_returns_XY, 32, 2);  // 32 bits, 2 context
    contexts[context].ic_dY = new IntegerCompressor(enc_channel_returns_XY, 32, 22); // 32 bits, 22 contexts

    /* for the Z layer */

    contexts[context].ic_Z = new IntegerCompressor(enc_Z, 32, 20);  // 32 bits, 20 contexts

    /* for the classification layer */
    /* for the flags layer */
    /* for the user_data layer */

    for (i = 0; i < 64; i++)
    {
      contexts[context].m_classification[i] = 0;
      contexts[context].m_flags[i] = 0;
      contexts[context].m_user_data[i] = 0;
    }

    /* for the intensity layer */

    contexts[context].ic_intensity = new IntegerCompressor(enc_intensity, 16, 4);

    /* for the scan_angle layer */

    contexts[context].ic_scan_angle = new IntegerCompressor(enc_scan_angle, 16, 2);

    /* for the point_source_ID layer */