using System; using System.IO; using System.Linq; using System.Threading; using System.Threading.Tasks; using MediaBrowser.Controller.Drawing; using MediaBrowser.Controller.Entities; using MediaBrowser.Controller.Library; using MediaBrowser.Controller.Providers; using MediaBrowser.Model.Drawing; using MediaBrowser.Model.Entities; using Microsoft.Extensions.Logging; using TagLib; using TagLib.IFD; using TagLib.IFD.Entries; using TagLib.IFD.Tags; namespace Emby.Photos { /// /// Metadata provider for photos. /// public class PhotoProvider : ICustomMetadataProvider, IForcedProvider, IHasItemChangeMonitor { private readonly ILogger _logger; private readonly IImageProcessor _imageProcessor; // These are causing taglib to hang private readonly string[] _includeExtensions = new string[] { ".jpg", ".jpeg", ".png", ".tiff", ".cr2" }; /// /// Initializes a new instance of the class. /// /// The logger. /// The image processor. public PhotoProvider(ILogger logger, IImageProcessor imageProcessor) { _logger = logger; _imageProcessor = imageProcessor; } /// public string Name => "Embedded Information"; /// public bool HasChanged(BaseItem item, IDirectoryService directoryService) { if (item.IsFileProtocol) { var file = directoryService.GetFile(item.Path); return file != null && file.LastWriteTimeUtc != item.DateModified; } return false; } /// public Task FetchAsync(Photo item, MetadataRefreshOptions options, CancellationToken cancellationToken) { item.SetImagePath(ImageType.Primary, item.Path); // Examples: https://github.com/mono/taglib-sharp/blob/a5f6949a53d09ce63ee7495580d6802921a21f14/tests/fixtures/TagLib.Tests.Images/NullOrientationTest.cs if (_includeExtensions.Contains(Path.GetExtension(item.Path), StringComparer.OrdinalIgnoreCase)) { try { using (var file = TagLib.File.Create(item.Path)) { if (file.GetTag(TagTypes.TiffIFD) is IFDTag tag) { var structure = tag.Structure; if (structure != null && structure.GetEntry(0, (ushort)IFDEntryTag.ExifIFD) is SubIFDEntry exif) { var exifStructure = exif.Structure; if (exifStructure != null) { var entry = exifStructure.GetEntry(0, (ushort)ExifEntryTag.ApertureValue) as RationalIFDEntry; if (entry != null) { item.Aperture = (double)entry.Value.Numerator / entry.Value.Denominator; } entry = exifStructure.GetEntry(0, (ushort)ExifEntryTag.ShutterSpeedValue) as RationalIFDEntry; if (entry != null) { item.ShutterSpeed = (double)entry.Value.Numerator / entry.Value.Denominator; } } } } if (file is TagLib.Image.File image) { item.CameraMake = image.ImageTag.Make; item.CameraModel = image.ImageTag.Model; item.Width = image.Properties.PhotoWidth; item.Height = image.Properties.PhotoHeight; var rating = image.ImageTag.Rating; item.CommunityRating = rating.HasValue ? rating : null; item.Overview = image.ImageTag.Comment; if (!string.IsNullOrWhiteSpace(image.ImageTag.Title) && !item.LockedFields.Contains(MetadataField.Name)) { item.Name = image.ImageTag.Title; } var dateTaken = image.ImageTag.DateTime; if (dateTaken.HasValue) { item.DateCreated = dateTaken.Value; item.PremiereDate = dateTaken.Value; item.ProductionYear = dateTaken.Value.Year; } item.Genres = image.ImageTag.Genres; item.Tags = image.ImageTag.Keywords; item.Software = image.ImageTag.Software; if (image.ImageTag.Orientation == TagLib.Image.ImageOrientation.None) { item.Orientation = null; } else if (Enum.TryParse(image.ImageTag.Orientation.ToString(), true, out ImageOrientation orientation)) { item.Orientation = orientation; } item.ExposureTime = image.ImageTag.ExposureTime; item.FocalLength = image.ImageTag.FocalLength; item.Latitude = image.ImageTag.Latitude; item.Longitude = image.ImageTag.Longitude; item.Altitude = image.ImageTag.Altitude; if (image.ImageTag.ISOSpeedRatings.HasValue) { item.IsoSpeedRating = Convert.ToInt32(image.ImageTag.ISOSpeedRatings.Value); } else { item.IsoSpeedRating = null; } } } } catch (Exception ex) { _logger.LogError(ex, "Image Provider - Error reading image tag for {0}", item.Path); } } if (item.Width <= 0 || item.Height <= 0) { var img = item.GetImageInfo(ImageType.Primary, 0); try { var size = _imageProcessor.GetImageDimensions(item, img); if (size.Width > 0 && size.Height > 0) { item.Width = size.Width; item.Height = size.Height; } } catch (ArgumentException) { // format not supported } } const ItemUpdateType Result = ItemUpdateType.ImageUpdate | ItemUpdateType.MetadataImport; return Task.FromResult(Result); } } }