load embedded song metadata (#495)

* load embedded song metadata

* index song artist and song album

* reset all song metadata

ErsatzTV.Core/Interfaces/Metadata/ILocalMetadataProvider.cs

@@ -12,6 +12,7 @@ namespace ErsatzTV.Core.Interfaces.Metadata
         Task<bool> RefreshSidecarMetadata(Episode episode, string nfoFileName);
         Task<bool> RefreshSidecarMetadata(Artist artist, string nfoFileName);
         Task<bool> RefreshSidecarMetadata(MusicVideo musicVideo, string nfoFileName);
+        Task<bool> RefreshTagMetadata(Song song, string ffprobePath);
         Task<bool> RefreshFallbackMetadata(Movie movie);
         Task<bool> RefreshFallbackMetadata(Episode episode);
         Task<bool> RefreshFallbackMetadata(Artist artist, string artistFolder);

ErsatzTV.Core/Interfaces/Metadata/ILocalStatisticsProvider.cs

@@ -1,4 +1,5 @@
-using System.Threading.Tasks;
+using System.Collections.Generic;
+using System.Threading.Tasks;
 using ErsatzTV.Core.Domain;
 using LanguageExt;
 
@@ -8,5 +9,7 @@ namespace ErsatzTV.Core.Interfaces.Metadata
     {
         Task<Either<BaseError, bool>> RefreshStatistics(string ffprobePath, MediaItem mediaItem);
         Task<Either<BaseError, bool>> RefreshStatistics(string ffprobePath, MediaItem mediaItem, string mediaItemPath);
+
+        Task<Either<BaseError, Dictionary<string, string>>> GetFormatTags(string ffprobePath, MediaItem mediaItem);
     }
 }

ErsatzTV.Core/Interfaces/Metadata/ISongFolderScanner.cs

@@ -9,6 +9,7 @@ namespace ErsatzTV.Core.Interfaces.Metadata
         Task<Either<BaseError, Unit>> ScanFolder(
             LibraryPath libraryPath,
             string ffprobePath,
+            string ffmpegPath,
             decimal progressMin,
             decimal progressMax);
     }

ErsatzTV.Core/Interfaces/Repositories/ISongRepository.cs

@@ -11,6 +11,7 @@ namespace ErsatzTV.Core.Interfaces.Repositories
         Task<Either<BaseError, MediaItemScanResult<Song>>> GetOrAdd(LibraryPath libraryPath, string path);
         Task<IEnumerable<string>> FindSongPaths(LibraryPath libraryPath);
         Task<List<int>> DeleteByPath(LibraryPath libraryPath, string path);
+        Task<bool> AddGenre(SongMetadata metadata, Genre genre);
         Task<bool> AddTag(SongMetadata metadata, Tag tag);
         Task<List<SongMetadata>> GetSongsForCards(List<int> ids);
     }