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 { public class PhotoProvider : ICustomMetadataProvider, IForcedProvider, IHasItemChangeMonitor { private readonly ILogger _logger; private IImageProcessor _imageProcessor; public PhotoProvider(ILogger logger, IImageProcessor imageProcessor) { _logger = logger; _imageProcessor = imageProcessor; } public bool HasChanged(BaseItem item, IDirectoryService directoryService) { if (item.IsFileProtocol) { var file = directoryService.GetFile(item.Path); if (file != null && file.LastWriteTimeUtc != item.DateModified) { return true; } } return false; } // These are causing taglib to hang private string[] _includextensions = new string[] { ".jpg", ".jpeg", ".png", ".tiff", ".cr2" }; 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 (_includextensions.Contains(Path.GetExtension(item.Path) ?? string.Empty, StringComparer.OrdinalIgnoreCase)) { try { using (var file = TagLib.File.Create(item.Path)) { var image = file as TagLib.Image.File; var tag = file.GetTag(TagTypes.TiffIFD) as IFDTag; if (tag != null) { var structure = tag.Structure; if (structure != null) { var exif = structure.GetEntry(0, (ushort)IFDEntryTag.ExifIFD) as SubIFDEntry; if (exif != null) { var exifStructure = exif.Structure; if (exifStructure != null) { var entry = exifStructure.GetEntry(0, (ushort)ExifEntryTag.ApertureValue) as RationalIFDEntry; if (entry != null) { double val = entry.Value.Numerator; val /= entry.Value.Denominator; item.Aperture = val; } entry = exifStructure.GetEntry(0, (ushort)ExifEntryTag.ShutterSpeedValue) as RationalIFDEntry; if (entry != null) { double val = entry.Value.Numerator; val /= entry.Value.Denominator; item.ShutterSpeed = val; } } } } } if (image != null) { 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; if (rating.HasValue) { item.CommunityRating = rating; } else { item.CommunityRating = null; } item.Overview = image.ImageTag.Comment; if (!string.IsNullOrWhiteSpace(image.ImageTag.Title)) { if (!item.LockedFields.Contains(MetadataFields.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, false); 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); } public string Name => "Embedded Information"; } }