Code cleanup: some lowlevel codec infrastructure moved

from CUETools.Processor to CUETools.Codecs

CUETools.Codecs/CUEToolsUDCList.cs

@@ -0,0 +1,51 @@
+using System;
+using System.ComponentModel;
+
+namespace CUETools.Codecs
+{
+    public class CUEToolsUDCList : BindingList<CUEToolsUDC>
+    {
+        bool m_encoder;
+
+        public CUEToolsUDCList(bool encoder)
+            : base()
+        {
+            AddingNew += OnAddingNew;
+            m_encoder = encoder;
+        }
+
+        private void OnAddingNew(object sender, AddingNewEventArgs e)
+        {
+            e.NewObject = m_encoder ?
+                new CUEToolsUDC("new", "wav", true, "", "", "", "") :
+                new CUEToolsUDC("new", "wav", "", "");
+        }
+
+        public bool TryGetValue(string extension, bool lossless, string name, out CUEToolsUDC result)
+        {
+            foreach (CUEToolsUDC udc in this)
+            {
+                if (udc.extension == extension && udc.lossless == lossless && udc.name == name)
+                {
+                    result = udc;
+                    return true;
+                }
+            }
+            result = null;
+            return false;
+        }
+
+        public CUEToolsUDC GetDefault(string extension, bool lossless)
+        {
+            CUEToolsUDC result = null;
+            foreach (CUEToolsUDC udc in this)
+            {
+                if (udc.extension == extension && udc.lossless == lossless && (result == null || result.priority < udc.priority))
+                {
+                    result = udc;
+                }
+            }
+            return result;
+        }
+    }
+}