reduce file checks during library scan

Emby.Photos/PhotoProvider.cs

@@ -17,7 +17,7 @@ using TagLib.IFD.Tags;
 
 namespace Emby.Photos
 {
-    public class PhotoProvider : ICustomMetadataProvider<Photo>, IHasItemChangeMonitor, IForcedProvider
+    public class PhotoProvider : ICustomMetadataProvider<Photo>, IForcedProvider
     {
         private readonly ILogger _logger;
         private readonly IFileSystem _fileSystem;
@@ -177,19 +177,5 @@ namespace Emby.Photos
         {
             get { return "Embedded Information"; }
         }
-
-        public bool HasChanged(IHasMetadata item, IDirectoryService directoryService)
-        {
-            if (item.EnableRefreshOnDateModifiedChange && !string.IsNullOrWhiteSpace(item.Path) && item.LocationType == LocationType.FileSystem)
-            {
-                var file = directoryService.GetFile(item.Path);
-                if (file != null && file.LastWriteTimeUtc != item.DateModified)
-                {
-                    return true;
-                }
-            }
-
-            return false;
-        }
     }
 }

Emby.Server.Implementations/Library/MediaSourceManager.cs

@@ -96,23 +96,17 @@ namespace Emby.Server.Implementations.Library
             return GetMediaStreamsForItem(list);
         }
 
-        private List<MediaStream> GetMediaStreamsForItem(IEnumerable<MediaStream> streams)
+        private List<MediaStream> GetMediaStreamsForItem(List<MediaStream> streams)
         {
-            var list = streams.ToList();
+            foreach (var stream in streams)
-
-            var subtitleStreams = list
-                .Where(i => i.Type == MediaStreamType.Subtitle)
-                .ToList();
-
-            if (subtitleStreams.Count > 0)
             {
-                foreach (var subStream in subtitleStreams)
+                if (stream.Type == MediaStreamType.Subtitle)
                 {
-                    subStream.SupportsExternalStream = StreamSupportsExternalStream(subStream);
+                    stream.SupportsExternalStream = StreamSupportsExternalStream(stream);
                 }
             }
 
-            return list;
+            return streams;
         }
 
         public async Task<IEnumerable<MediaSourceInfo>> GetPlayackMediaSources(string id, string userId, bool enablePathSubstitution, string[] supportedLiveMediaTypes, CancellationToken cancellationToken)

MediaBrowser.Controller/Entities/AudioBook.cs

@@ -51,12 +51,6 @@ namespace MediaBrowser.Controller.Entities
             return null;
         }
 
-        [IgnoreDataMember]
-        public override bool EnableRefreshOnDateModifiedChange
-        {
-            get { return true; }
-        }
-
         public Guid? FindSeriesId()
         {
             return SeriesId;

MediaBrowser.Controller/Entities/Book.cs

@@ -38,12 +38,6 @@ namespace MediaBrowser.Controller.Entities
             return SeriesPresentationUniqueKey;
         }
 
-        [IgnoreDataMember]
-        public override bool EnableRefreshOnDateModifiedChange
-        {
-            get { return true; }
-        }
-
         public Guid? FindSeriesId()
         {
             return SeriesId;

MediaBrowser.Controller/Entities/Game.cs

@@ -28,12 +28,6 @@ namespace MediaBrowser.Controller.Entities
                    locationType != LocationType.Virtual;
         }
 
-        [IgnoreDataMember]
-        public override bool EnableRefreshOnDateModifiedChange
-        {
-            get { return true; }
-        }
-
         [IgnoreDataMember]
         public override bool SupportsThemeMedia
         {

MediaBrowser.Controller/LiveTv/LiveTvChannel.cs

@@ -136,7 +136,8 @@ namespace MediaBrowser.Controller.LiveTv
                 Name = Name,
                 Path = Path,
                 RunTimeTicks = RunTimeTicks,
-                Type = MediaSourceType.Placeholder
+                Type = MediaSourceType.Placeholder,
+                IsInfiniteStream = RunTimeTicks == null
             };
 
             list.Add(info);

MediaBrowser.Controller/MediaBrowser.Controller.csproj

@@ -220,7 +220,6 @@
     <Compile Include="Providers\IExternalId.cs" />
     <Compile Include="Providers\IExtrasProvider.cs" />
     <Compile Include="Providers\IForcedProvider.cs" />
-    <Compile Include="Providers\IHasChangeMonitor.cs" />
     <Compile Include="Entities\IHasMetadata.cs" />
     <Compile Include="Providers\IHasItemChangeMonitor.cs" />
     <Compile Include="Providers\IHasLookupInfo.cs" />

MediaBrowser.Controller/Providers/IHasChangeMonitor.cs

@@ -1,17 +0,0 @@
-using MediaBrowser.Controller.Entities;
-using System;
-
-namespace MediaBrowser.Controller.Providers
-{
-    public interface IHasChangeMonitor
-    {
-        /// <summary>
-        /// Determines whether the specified item has changed.
-        /// </summary>
-        /// <param name="item">The item.</param>
-        /// <param name="directoryService">The directory service.</param>
-        /// <param name="date">The date.</param>
-        /// <returns><c>true</c> if the specified item has changed; otherwise, <c>false</c>.</returns>
-        bool HasChanged(IHasMetadata item, IDirectoryService directoryService, DateTime date);
-    }
-}

MediaBrowser.Providers/MediaInfo/AudioImageProvider.cs

@@ -19,7 +19,7 @@ namespace MediaBrowser.Providers.MediaInfo
     /// <summary>
     /// Uses ffmpeg to create video images
     /// </summary>
-    public class AudioImageProvider : IDynamicImageProvider, IHasItemChangeMonitor
+    public class AudioImageProvider : IDynamicImageProvider
     {
         private readonly IMediaEncoder _mediaEncoder;
         private readonly IServerConfigurationManager _config;
@@ -134,19 +134,5 @@ namespace MediaBrowser.Providers.MediaInfo
 
             return item.LocationType == LocationType.FileSystem && audio != null;
         }
-
-        public bool HasChanged(IHasMetadata item, IDirectoryService directoryService)
-        {
-            if (item.EnableRefreshOnDateModifiedChange && !string.IsNullOrWhiteSpace(item.Path) && item.LocationType == LocationType.FileSystem)
-            {
-                var file = directoryService.GetFile(item.Path);
-                if (file != null && file.LastWriteTimeUtc != item.DateModified)
-                {
-                    return true;
-                }
-            }
-
-            return false;
-        }
     }
 }

MediaBrowser.Providers/MediaInfo/FFProbeProvider.cs

@@ -34,7 +34,6 @@ namespace MediaBrowser.Providers.MediaInfo
         ICustomMetadataProvider<Audio>,
         ICustomMetadataProvider<AudioPodcast>,
         ICustomMetadataProvider<AudioBook>,
-        IHasItemChangeMonitor,
         IHasOrder,
         IForcedProvider,
         IPreRefreshProvider
@@ -180,32 +179,6 @@ namespace MediaBrowser.Providers.MediaInfo
             return prober.Probe(item, cancellationToken);
         }
 
-        public bool HasChanged(IHasMetadata item, IDirectoryService directoryService)
-        {
-            if (item.EnableRefreshOnDateModifiedChange && !string.IsNullOrWhiteSpace(item.Path) && item.LocationType == LocationType.FileSystem)
-            {
-                var file = directoryService.GetFile(item.Path);
-                if (file != null && file.LastWriteTimeUtc != item.DateModified)
-                {
-                    return true;
-                }
-            }
-
-            if (item.SupportsLocalMetadata)
-            {
-                var video = item as Video;
-
-                if (video != null && !video.IsPlaceHolder)
-                {
-                    return !video.SubtitleFiles
-                        .SequenceEqual(SubtitleResolver.GetSubtitleFiles(video, directoryService, _fileSystem, false)
-                        .OrderBy(i => i), StringComparer.OrdinalIgnoreCase);
-                }
-            }
-
-            return false;
-        }
-
         public int Order
         {
             get

MediaBrowser.Providers/MediaInfo/VideoImageProvider.cs

@@ -16,7 +16,7 @@ using System.Threading.Tasks;
 
 namespace MediaBrowser.Providers.MediaInfo
 {
-    public class VideoImageProvider : IDynamicImageProvider, IHasItemChangeMonitor, IHasOrder
+    public class VideoImageProvider : IDynamicImageProvider, IHasOrder
     {
         private readonly IMediaEncoder _mediaEncoder;
         private readonly ILogger _logger;
@@ -149,19 +149,5 @@ namespace MediaBrowser.Providers.MediaInfo
                 return 100;
             }
         }
-
-        public bool HasChanged(IHasMetadata item, IDirectoryService directoryService)
-        {
-            if (item.EnableRefreshOnDateModifiedChange && !string.IsNullOrWhiteSpace(item.Path) && item.LocationType == LocationType.FileSystem)
-            {
-                var file = directoryService.GetFile(item.Path);
-                if (file != null && file.LastWriteTimeUtc != item.DateModified)
-                {
-                    return true;
-                }
-            }
-
-            return false;
-        }
     }
 }