private static IEnumerable <IEnumerable <VideoFingerPrintDatabaseMetaTableEntryWrapper> > DetermineGroups(IEnumerable <VideoFingerPrintDatabaseMetaTableEntryWrapper> entries)
{
var unusedEntries = new HashSet <VideoFingerPrintDatabaseMetaTableEntryWrapper>(entries);
var groupedEntries = new HashSet <IEnumerable <VideoFingerPrintDatabaseMetaTableEntryWrapper> >();
while (unusedEntries.Any())
{
ulong currentGroupSize = 0;
var currentGroup = new HashSet <VideoFingerPrintDatabaseMetaTableEntryWrapper>();
while (currentGroupSize < FileSizeLimit)
{
VideoFingerPrintDatabaseMetaTableEntryWrapper currentEntry = unusedEntries.FirstOrDefault();
if (currentEntry == null)
{
// We didn't hit the limit before exhausting all available entries
break;
}
unusedEntries.Remove(currentEntry);
currentGroup.Add(currentEntry);
currentGroupSize += currentEntry.FileSize;
}
groupedEntries.Add(currentGroup);
}
return(groupedEntries);
}
public void TestDatabaseMetaTableSerialization()
{
var entry = new VideoFingerPrintDatabaseMetaTableEntryWrapper
{
FileName = "test",
FileSize = 1,
};
var entry2 = new VideoFingerPrintDatabaseMetaTableEntryWrapper
{
FileName = "test 2",
FileSize = 2,
};
var database = new VideoFingerPrintDatabaseMetaTableWrapper
{
DatabaseMetaTableEntries = new[] { entry, entry2 },
};
using (var memoryStream = new MemoryStream())
{
VideoFingerPrintDatabaseMetaTableSaver.Save(database, memoryStream);
byte[] savedDatabase = memoryStream.ToArray();
VideoFingerPrintDatabaseMetaTableWrapper reloadedDatabase = VideoFingerPrintDatabaseMetaTableLoader.Load(savedDatabase);
Assert.AreEqual(database, reloadedDatabase);
}
}
private void UpdateMetatable(string databasePath, ulong fileSize)
{
VideoFingerPrintDatabaseMetaTableWrapper metatable = CreateOrLoadMetatable(_metatablePath);
// Get matching database entry
VideoFingerPrintDatabaseMetaTableEntryWrapper databaseEntry = (from entry in metatable.DatabaseMetaTableEntries
where string.Equals(entry.FileName, databasePath, StringComparison.Ordinal)
select entry).SingleOrDefault();
databaseEntry.FileSize = fileSize;
VideoFingerPrintDatabaseMetaTableSaver.Save(metatable, _metatablePath);
}
