Method readHeaderFromFile

YUViewLib/src/statistics/StatisticsFileVTMBMS.cpp:416–554

}

void StatisticsFileVTMBMS::readHeaderFromFile(StatisticsData &statisticsData)
{
  try
  {
    if (!this->file.isOk())
      return;

    statisticsData.clear();

    while (!this->file.atEnd())
    {
      // read one line
      auto    aLineByteArray = this->file.readLine();
      QString aLine(aLineByteArray);

      // if we found a non-header line, stop here
      if (aLine[0] != '#')
        return;

      // extract statistics information from header lines
      // match:
      //# Sequence size: [832x 480]
      QRegularExpression sequenceSizeRegex("# Sequence size: \\[([0-9]+)x *([0-9]+)\\]");

      // match:
      //# Block Statistic Type: MergeFlag; Flag
      QRegularExpression availableStatisticsRegex(
          "# Block Statistic Type: *([0-9a-zA-Z_]+); *([0-9a-zA-Z]+); *(.*)");

      // get sequence size
      auto sequenceSizeMatch = sequenceSizeRegex.match(aLine);
      if (sequenceSizeMatch.hasMatch())
      {
        statisticsData.setFrameSize(
            Size(sequenceSizeMatch.captured(1).toInt(), sequenceSizeMatch.captured(2).toInt()));
      }

      // get available statistics
      auto availableStatisticsMatch = availableStatisticsRegex.match(aLine);
      if (availableStatisticsMatch.hasMatch())
      {
        StatisticsType aType;
        // Store initial state.
        aType.setInitialState();

        // set name
        aType.typeName = availableStatisticsMatch.captured(1);

        // with -1, an id will be automatically assigned
        aType.typeID = -1;

        // check if scalar or vector
        auto statType = availableStatisticsMatch.captured(2);
        if (statType.contains(
                "AffineTFVectors")) // "Vector" is contained in this, need to check it first
        {
          auto               scaleInfo = availableStatisticsMatch.captured(3);
          QRegularExpression scaleInfoRegex("Scale: *([0-9]+)");