Separate out PlayerSource (nw)

RedBookPlayer/PlayerSource.cs

@@ -0,0 +1,44 @@
+using System;
+using CSCore;
+using WaveFormat = CSCore.WaveFormat;
+
+namespace RedBookPlayer
+{
+    public class PlayerSource : IWaveSource
+    {
+        public delegate int ReadFunction(byte[] buffer, int offset, int count);
+
+        readonly ReadFunction _read;
+
+        public bool Run = true;
+
+        public PlayerSource(ReadFunction read) => _read = read;
+
+        public WaveFormat WaveFormat => new WaveFormat();
+        bool IAudioSource.CanSeek    => throw new NotImplementedException();
+
+        public long Position
+        {
+            get => throw new NotImplementedException();
+            set => throw new NotImplementedException();
+        }
+
+        public long Length => throw new NotImplementedException();
+
+        public int Read(byte[] buffer, int offset, int count)
+        {
+            if(Run)
+                return _read(buffer, offset, count);
+
+            Array.Clear(buffer, offset, count);
+
+            return count;
+        }
+
+        public void Dispose() {}
+
+        public void Start() => Run = true;
+
+        public void Stop() => Run = false;
+    }
+}