public IEnumerable <FrameHashBase> GetAllFrameHashes(EnumFramingMode mode)
{
using var context = VideoIndexingDbContext.Create();
var query = from frameHash in context.FrameHashes
where frameHash.Discriminator == mode
select frameHash;
return(query.ToList());
}
public IEnumerable <SimilarityInfo> FindSimilarVideos(EnumFramingMode mode, Concept concept)
{
var concepts = conceptProcessor.BuildConceptsFromFrameHashes(mode);
return(concepts.SelectMany(builtConcept => conceptProcessor.CompareConcepts(concept, builtConcept))
.GroupBy(similarity => similarity.Original.VideoId)
.Select(groupedSimilarity => groupedSimilarity.OrderByDescending(similarity => similarity.Similarity).First())
.OrderByDescending(similarity => similarity.Similarity)
.Take(SimilarityThreshold)
.ToImmutableList());
}
public IEnumerable <Concept> BuildConceptsFromFrameHashes(EnumFramingMode mode)
{
var frameHashes = frameHashesQueries.GetAllFrameHashes(mode);
var parsedFrames = ParseFrameHashesIntoFrames(frameHashes);
var concepts = parsedFrames.Item1;
var videos = parsedFrames.Item2;
var frames = parsedFrames.Item3;
var hashes = parsedFrames.Item4;
return(BuildConceptsFromParsedFrames(concepts, videos, frames, hashes));
}
