Method guessFormatFromFilename

YUViewLib/src/filesource/FileSource.cpp:145–303

}

FileSource::fileFormat_t FileSource::guessFormatFromFilename() const
{
  FileSource::fileFormat_t format;

  // We are going to check two strings (one after the other) for indicators on the frames size, fps
  // and bit depth. 1: The file name, 2: The folder name that the file is contained in.

  auto dirName  = this->fileInfo.absoluteDir().dirName();
  auto fileName = this->fileInfo.fileName();
  if (fileName.isEmpty())
    return format;

  for (auto const &name : {fileName, dirName})
  {
    // First, we will try to get a frame size from the name
    if (!format.frameSize.isValid())
    {
      // The regular expressions to match. They are sorted from most detailed to least so that the
      // most detailed ones are tested first.
      auto regExprList =
          QStringList()
          << "([0-9]+)(?:x|X|\\*)([0-9]+)_([0-9]+)(?:Hz)?_([0-9]+)b?[\\._]" // Something_2160x1440_60_8_more.yuv
                                                                            // or
                                                                            // Something_2160x1440_60_8b.yuv
                                                                            // or
                                                                            // Something_2160x1440_60Hz_8_more.yuv
          << "([0-9]+)(?:x|X|\\*)([0-9]+)_([0-9]+)(?:Hz)?[\\._]" // Something_2160x1440_60_more.yuv
                                                                 // or Something_2160x1440_60.yuv
          << "([0-9]+)(?:x|X|\\*)([0-9]+)[\\._]";                // Something_2160x1440_more.yuv or
                                                                 // Something_2160x1440.yuv

      for (auto regExpStr : regExprList)
      {
        QRegularExpression exp(regExpStr);
        auto               match = exp.match(name);
        if (match.hasMatch())
        {
          auto widthString  = match.captured(1);
          auto heightString = match.captured(2);
          format.frameSize  = Size(widthString.toInt(), heightString.toInt());

          auto rateString = match.captured(3);
          if (!rateString.isEmpty())
            format.frameRate = rateString.toDouble();

          auto bitDepthString = match.captured(4);
          if (!bitDepthString.isEmpty())
            format.bitDepth = bitDepthString.toUInt();

          break; // Don't check the following expressions
        }
      }
    }

    // try resolution indicators with framerate: "1080p50", "720p24" ...
    if (!format.frameSize.isValid())
    {
      QRegularExpression rx1080p("1080p([0-9]+)");