update default image providers

MediaBrowser.Controller/Providers/IDynamicImageProvider.cs

@@ -0,0 +1,27 @@
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Model.Entities;
+
+namespace MediaBrowser.Controller.Providers
+{
+    public interface IDynamicImageProvider : IImageProvider
+    {
+        /// <summary>
+        /// Gets the supported images.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <returns>IEnumerable{ImageType}.</returns>
+        IEnumerable<ImageType> GetSupportedImages(IHasImages item);
+
+        /// <summary>
+        /// Gets the image.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <param name="type">The type.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task{DynamicImageResponse}.</returns>
+        Task<DynamicImageResponse> GetImage(IHasImages item, ImageType type, CancellationToken cancellationToken);
+    }
+}