Revert "Simplifying image handling"

This reverts commit f264024666.

LLama.Examples/Examples/LlavaInteractiveModeExecute.cs

@@ -102,7 +102,7 @@ namespace LLama.Examples.Examples
                     //
                     foreach (var image in imagePaths)
                     {
-                        ex.Images.Add(File.ReadAllBytes(image));
+                        ex.Images.Add(new ImageData(ImageData.DataType.ImagePath, image));
                     }
                 }
 

LLama/Abstractions/ILLamaExecutor.cs

@@ -27,7 +27,7 @@ namespace LLama.Abstractions
         /// <summary>
         /// List of images: Image filen path, uri or image byte array. See ImageData.
         /// </summary>
-        public List<byte[]> Images { get; }
+        public List<ImageData> Images { get; }
 
         /// <summary>
         /// Asynchronously infers a response from the model.
@@ -38,4 +38,46 @@ namespace LLama.Abstractions
         /// <returns></returns>
         IAsyncEnumerable<string> InferAsync(string text, IInferenceParams? inferenceParams = null, CancellationToken token = default);
     }
+
+    /// <summary>
+    /// Holds image data
+    /// </summary>
+    public class ImageData
+    {
+        /// <summary>
+        /// constructor
+        /// </summary>
+        /// <param name="type"></param>
+        /// <param name="data"></param>
+        public ImageData(DataType type, object data) { Type = type; Data = data; }
+
+        /// <summary>
+        /// the possible types of image data
+        /// </summary>
+        public enum DataType 
+        { 
+            /// <summary>
+            /// file path
+            /// </summary>
+            ImagePath, 
+            /// <summary>
+            /// byte array
+            /// </summary>
+            ImageBytes, 
+            /// <summary>
+            /// uri
+            /// </summary>
+            ImageURL 
+        }
+
+        /// <summary>
+        /// the type of this image data
+        /// </summary>
+        public DataType Type { get; set; }
+
+        /// <summary>
+        /// the image data (string, byte array or uri)
+        /// </summary>
+        public object? Data { get; set; }
+    }
 }

LLama/LLamaStatelessExecutor.cs

@@ -34,7 +34,7 @@ namespace LLama
         public LLavaWeights? ClipModel { get;  }
 
         /// <inheritdoc />
-        public List<byte[]> Images { get; set; }
+        public List<ImageData> Images { get; set; }
 
         /// <summary>
         /// The context used by the executor when running the inference.
@@ -49,7 +49,7 @@ namespace LLama
         /// <param name="logger"></param>
         public StatelessExecutor(LLamaWeights weights, IContextParams @params, ILogger? logger = null)
         {
-            Images = new List<byte[]>();
+            Images = new List<ImageData>();
             _weights = weights;
             _params = @params;
             _logger = logger;