/// <summary>
/// Returns a value between 0 and 1 how good the matching is.
/// </summary>
public double RateBiMatchedLines(SubtitleMatcher.BiMatchedLines biMatchedLines)
{
// [shared times between lines from list1 and list2] divided by [whole time]
// ...because this value is between 0 and 0.5 we have to multiply it with 2
// calculate "all time"
double sharedTime = 0;
double allTimeSpanTime = 0;
for (int listIndex = 0; listIndex < 2; listIndex++)
{
foreach (var currentLine in biMatchedLines.listlines[listIndex])
{
allTimeSpanTime += UtilsCommon.GetTimeSpanLength(currentLine);
}
}
// calculate "shared time"
foreach (var lineInfoA in biMatchedLines.listlines[0])
{
foreach (var lineInfoB in biMatchedLines.listlines[1])
{
sharedTime += UtilsCommon.OverlappingTimeSpan(lineInfoA, lineInfoB);
}
}
return((sharedTime * 2) / allTimeSpanTime);
}
/// <summary>
/// Score for overlapping of two subtitles between 0 and 1.
///
/// Corner cases:
/// subtitles do not overlap -> 0
/// subtitles fully overlap -> 1
/// </summary>
/// <returns>The score.</returns>
/// <param name="a">The alpha component.</param>
/// <param name="b">The blue component.</param>
public static double OverlappingScore(ITimeSpan a, ITimeSpan b)
{
double overlappingSpan = UtilsCommon.OverlappingTimeSpan(a, b);
double line1timeSpan = a.EndTime - a.StartTime;
double line2timeSpan = b.EndTime - b.StartTime;
// ignore matchings if there is next to no overlapping
double line1score = (double)overlappingSpan / (double)line1timeSpan;
double line2score = (double)overlappingSpan / (double)line2timeSpan;
return((line1score + line2score) * 0.5f);
}
